]> git.openstreetmap.org Git - rails.git/blobdiff - vendor/assets/iD/iD.js
Update to iD v2.20.4
[rails.git] / vendor / assets / iD / iD.js
index 24cb83d9fde13bd007f17358c2acda98dc09a2d5..088e252a260e8bc791ff56df4edb2d3930f0ca78 100644 (file)
@@ -2,35 +2,24 @@
 
        var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
 
-       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 =
-         /* global globalThis -- safe */
+       var global$1o =
+         // 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 -- fallback
          (function () { return this; })() || Function('return this')();
 
-       var fails = function (exec) {
+       var objectGetOwnPropertyDescriptor = {};
+
+       var fails$V = function (exec) {
          try {
            return !!exec();
          } catch (error) {
          }
        };
 
+       var fails$U = fails$V;
+
        // Detect IE8's incomplete defineProperty implementation
-       var descriptors = !fails(function () {
+       var descriptors = !fails$U(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 fails$T = fails$V;
+
+       var functionBindNative = !fails$T(function () {
+         var test = (function () { /* empty */ }).bind();
+         // eslint-disable-next-line no-prototype-builtins -- safe
+         return typeof test != 'function' || test.hasOwnProperty('prototype');
+       });
+
+       var NATIVE_BIND$4 = functionBindNative;
+
+       var call$q = Function.prototype.call;
+
+       var functionCall = NATIVE_BIND$4 ? call$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.es/ecma262/#sec-object.prototype.propertyisenumerable
-       var f = NASHORN_BUG ? function propertyIsEnumerable(V) {
-         var descriptor = getOwnPropertyDescriptor(this, V);
+       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 NATIVE_BIND$3 = functionBindNative;
+
+       var FunctionPrototype$3 = Function.prototype;
+       var bind$g = FunctionPrototype$3.bind;
+       var call$p = FunctionPrototype$3.call;
+       var uncurryThis$Y = NATIVE_BIND$3 && bind$g.bind(call$p, call$p);
 
-       var classofRaw = function (it) {
-         return toString.call(it).slice(8, -1);
+       var functionUncurryThis = NATIVE_BIND$3 ? function (fn) {
+         return fn && uncurryThis$Y(fn);
+       } : function (fn) {
+         return fn && function () {
+           return call$p.apply(fn, arguments);
+         };
        };
 
-       var split = ''.split;
+       var uncurryThis$X = functionUncurryThis;
+
+       var toString$n = uncurryThis$X({}.toString);
+       var stringSlice$c = uncurryThis$X(''.slice);
+
+       var classofRaw$1 = function (it) {
+         return stringSlice$c(toString$n(it), 8, -1);
+       };
+
+       var global$1n = global$1o;
+       var uncurryThis$W = functionUncurryThis;
+       var fails$S = fails$V;
+       var classof$e = classofRaw$1;
+
+       var Object$5 = global$1n.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$S(function () {
          // throws an error in rhino, see https://github.com/mozilla/rhino/issues/346
          // eslint-disable-next-line no-prototype-builtins -- safe
-         return !Object('z').propertyIsEnumerable(0);
+         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$1m = global$1o;
+
+       var TypeError$p = global$1m.TypeError;
 
        // `RequireObjectCoercible` abstract operation
        // https://tc39.es/ecma262/#sec-requireobjectcoercible
-       var requireObjectCoercible = function (it) {
-         if (it == undefined) throw TypeError("Can't call method on " + it);
+       var requireObjectCoercible$e = function (it) {
+         if (it == undefined) throw TypeError$p("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$e;
+
+       var toIndexedObject$d = 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 isObject$s = function (it) {
+         return typeof it == 'object' ? it !== null : isCallable$q(it);
+       };
 
+       var global$1l = global$1o;
+       var isCallable$p = isCallable$r;
 
-       var toIndexedObject = function (it) {
-         return indexedObject(requireObjectCoercible(it));
+       var aFunction = function (argument) {
+         return isCallable$p(argument) ? argument : undefined;
        };
 
-       var isObject = function (it) {
-         return typeof it === 'object' ? it !== null : typeof it === 'function';
+       var getBuiltIn$b = function (namespace, method) {
+         return arguments.length < 2 ? aFunction(global$1l[namespace]) : global$1l[namespace] && global$1l[namespace][method];
        };
 
+       var uncurryThis$V = functionUncurryThis;
+
+       var objectIsPrototypeOf = uncurryThis$V({}.isPrototypeOf);
+
+       var getBuiltIn$a = getBuiltIn$b;
+
+       var engineUserAgent = getBuiltIn$a('navigator', 'userAgent') || '';
+
+       var global$1k = global$1o;
+       var userAgent$7 = engineUserAgent;
+
+       var process$4 = global$1k.process;
+       var Deno = global$1k.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$3 = engineV8Version;
+       var fails$R = fails$V;
+
+       // eslint-disable-next-line es/no-object-getownpropertysymbols -- required for testing
+       var nativeSymbol = !!Object.getOwnPropertySymbols && !fails$R(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$1j = global$1o;
+       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$1j.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$1i = global$1o;
+
+       var String$6 = global$1i.String;
+
+       var tryToString$5 = function (argument) {
+         try {
+           return String$6(argument);
+         } catch (error) {
+           return 'Object';
+         }
+       };
+
+       var global$1h = global$1o;
+       var isCallable$n = isCallable$r;
+       var tryToString$4 = tryToString$5;
+
+       var TypeError$o = global$1h.TypeError;
+
+       // `Assert: IsCallable(argument) is true`
+       var aCallable$a = function (argument) {
+         if (isCallable$n(argument)) return argument;
+         throw TypeError$o(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$1g = global$1o;
+       var call$o = functionCall;
+       var isCallable$m = isCallable$r;
+       var isObject$r = isObject$s;
+
+       var TypeError$n = global$1g.TypeError;
+
+       // `OrdinaryToPrimitive` abstract operation
+       // https://tc39.es/ecma262/#sec-ordinarytoprimitive
+       var ordinaryToPrimitive$1 = function (input, pref) {
+         var fn, val;
+         if (pref === 'string' && isCallable$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$n("Can't convert object to primitive value");
+       };
+
+       var shared$5 = {exports: {}};
+
+       var isPure = false;
+
+       var global$1f = global$1o;
+
+       // eslint-disable-next-line es/no-object-defineproperty -- safe
+       var defineProperty$d = Object.defineProperty;
+
+       var setGlobal$3 = function (key, value) {
+         try {
+           defineProperty$d(global$1f, key, { value: value, configurable: true, writable: true });
+         } catch (error) {
+           global$1f[key] = value;
+         } return value;
+       };
+
+       var global$1e = global$1o;
+       var setGlobal$2 = setGlobal$3;
+
+       var SHARED = '__core-js_shared__';
+       var store$4 = global$1e[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: '3.21.0',
+         mode: 'global',
+         copyright: '© 2014-2022 Denis Pushkarev (zloirock.ru)',
+         license: 'https://github.com/zloirock/core-js/blob/v3.21.0/LICENSE',
+         source: 'https://github.com/zloirock/core-js'
+       });
+
+       var global$1d = global$1o;
+       var requireObjectCoercible$c = requireObjectCoercible$e;
+
+       var Object$3 = global$1d.Object;
+
+       // `ToObject` abstract operation
+       // https://tc39.es/ecma262/#sec-toobject
+       var toObject$i = function (argument) {
+         return Object$3(requireObjectCoercible$c(argument));
+       };
+
+       var uncurryThis$U = functionUncurryThis;
+       var toObject$h = toObject$i;
+
+       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$3(toObject$h(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$1c = global$1o;
+       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$1c.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$1b = global$1o;
+       var call$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$t;
+
+       var TypeError$m = global$1b.TypeError;
+       var TO_PRIMITIVE$1 = wellKnownSymbol$s('toPrimitive');
+
        // `ToPrimitive` abstract operation
        // https://tc39.es/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 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");
+       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$5(result)) return result;
+           throw TypeError$m("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$1a = global$1o;
+       var isObject$p = isObject$s;
+
+       var document$3 = global$1a.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) : {};
        };
 
-       // Thank's IE8 for his funny defineProperty
-       var ie8DomDefine = !descriptors && !fails(function () {
-         return Object.defineProperty(documentCreateElement('div'), 'a', {
+       var DESCRIPTORS$p = descriptors;
+       var fails$Q = fails$V;
+       var createElement$1 = documentCreateElement$2;
+
+       // Thanks to IE8 for its funny defineProperty
+       var ie8DomDefine = !DESCRIPTORS$p && !fails$Q(function () {
+         // eslint-disable-next-line es/no-object-defineproperty -- required for testing
+         return Object.defineProperty(createElement$1('div'), 'a', {
            get: function () { return 7; }
          }).a != 7;
        });
 
-       var nativeGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
+       var DESCRIPTORS$o = descriptors;
+       var call$m = functionCall;
+       var propertyIsEnumerableModule$2 = objectPropertyIsEnumerable;
+       var createPropertyDescriptor$6 = createPropertyDescriptor$7;
+       var toIndexedObject$c = toIndexedObject$d;
+       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$2 = Object.getOwnPropertyDescriptor;
 
        // `Object.getOwnPropertyDescriptor` method
        // https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
-       var f$1 = descriptors ? nativeGetOwnPropertyDescriptor : function getOwnPropertyDescriptor(O, P) {
-         O = toIndexedObject(O);
-         P = toPrimitive(P, true);
-         if (ie8DomDefine) try {
-           return nativeGetOwnPropertyDescriptor(O, P);
+       objectGetOwnPropertyDescriptor.f = DESCRIPTORS$o ? $getOwnPropertyDescriptor$2 : function getOwnPropertyDescriptor(O, P) {
+         O = toIndexedObject$c(O);
+         P = toPropertyKey$4(P);
+         if (IE8_DOM_DEFINE$1) try {
+           return $getOwnPropertyDescriptor$2(O, P);
          } catch (error) { /* empty */ }
-         if (has(O, P)) return createPropertyDescriptor(!objectPropertyIsEnumerable.f.call(O, P), O[P]);
+         if (hasOwn$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 DESCRIPTORS$n = descriptors;
+       var fails$P = fails$V;
+
+       // V8 ~ Chrome 36-
+       // https://bugs.chromium.org/p/v8/issues/detail?id=3334
+       var v8PrototypeDefineBug = DESCRIPTORS$n && fails$P(function () {
+         // eslint-disable-next-line es/no-object-defineproperty -- required for testing
+         return Object.defineProperty(function () { /* empty */ }, 'prototype', {
+           value: 42,
+           writable: false
+         }).prototype != 42;
+       });
+
+       var global$19 = global$1o;
+       var isObject$o = isObject$s;
+
+       var String$5 = global$19.String;
+       var TypeError$l = global$19.TypeError;
+
+       // `Assert: Type(argument) is Object`
+       var anObject$n = function (argument) {
+         if (isObject$o(argument)) return argument;
+         throw TypeError$l(String$5(argument) + ' is not an object');
        };
 
-       var nativeDefineProperty = Object.defineProperty;
+       var global$18 = global$1o;
+       var DESCRIPTORS$m = descriptors;
+       var IE8_DOM_DEFINE = ie8DomDefine;
+       var V8_PROTOTYPE_DEFINE_BUG$1 = v8PrototypeDefineBug;
+       var anObject$m = anObject$n;
+       var toPropertyKey$3 = toPropertyKey$5;
+
+       var TypeError$k = global$18.TypeError;
+       // eslint-disable-next-line es/no-object-defineproperty -- safe
+       var $defineProperty$1 = Object.defineProperty;
+       // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+       var $getOwnPropertyDescriptor$1 = Object.getOwnPropertyDescriptor;
+       var ENUMERABLE = 'enumerable';
+       var CONFIGURABLE$1 = 'configurable';
+       var WRITABLE = 'writable';
 
        // `Object.defineProperty` method
        // https://tc39.es/ecma262/#sec-object.defineproperty
-       var f$2 = descriptors ? nativeDefineProperty : function defineProperty(O, P, Attributes) {
-         anObject(O);
-         P = toPrimitive(P, true);
-         anObject(Attributes);
-         if (ie8DomDefine) try {
-           return nativeDefineProperty(O, P, Attributes);
+       objectDefineProperty.f = DESCRIPTORS$m ? V8_PROTOTYPE_DEFINE_BUG$1 ? function defineProperty(O, P, Attributes) {
+         anObject$m(O);
+         P = toPropertyKey$3(P);
+         anObject$m(Attributes);
+         if (typeof O === 'function' && P === 'prototype' && 'value' in Attributes && WRITABLE in Attributes && !Attributes[WRITABLE]) {
+           var current = $getOwnPropertyDescriptor$1(O, P);
+           if (current && current[WRITABLE]) {
+             O[P] = Attributes.value;
+             Attributes = {
+               configurable: CONFIGURABLE$1 in Attributes ? Attributes[CONFIGURABLE$1] : current[CONFIGURABLE$1],
+               enumerable: ENUMERABLE in Attributes ? Attributes[ENUMERABLE] : current[ENUMERABLE],
+               writable: false
+             };
+           }
+         } return $defineProperty$1(O, P, Attributes);
+       } : $defineProperty$1 : function defineProperty(O, P, Attributes) {
+         anObject$m(O);
+         P = toPropertyKey$3(P);
+         anObject$m(Attributes);
+         if (IE8_DOM_DEFINE) try {
+           return $defineProperty$1(O, P, Attributes);
          } catch (error) { /* empty */ }
-         if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported');
+         if ('get' in Attributes || 'set' in Attributes) throw TypeError$k('Accessors not supported');
          if ('value' in Attributes) O[P] = Attributes.value;
          return O;
        };
 
-       var objectDefineProperty = {
-               f: f$2
-       };
+       var DESCRIPTORS$l = 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$b = DESCRIPTORS$l ? 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$17 = global$1o;
+       var isCallable$k = isCallable$r;
+       var inspectSource$3 = inspectSource$4;
 
-       var nativeWeakMap = typeof WeakMap === 'function' && /native code/.test(inspectSource(WeakMap));
+       var WeakMap$1 = global$17.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: '3.9.1',
-         mode:  'global',
-         copyright: '© 2021 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$16 = global$1o;
+       var uncurryThis$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$1;
+       var OBJECT_ALREADY_INITIALIZED = 'Object already initialized';
+       var TypeError$j = global$16.TypeError;
+       var WeakMap = global$16.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$5(it)).type !== TYPE) {
+             throw TypeError$j('Incompatible receiver, ' + TYPE + ' required');
            } return state;
          };
        };
 
-       if (nativeWeakMap) {
-         var store$1 = sharedStore.state || (sharedStore.state = new WeakMap$1());
-         var wmget = store$1.get;
-         var wmhas = store$1.has;
-         var wmset = store$1.set;
-         set = function (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$1, it)) throw new TypeError$j(OBJECT_ALREADY_INITIALIZED);
            metadata.facade = it;
-           wmset.call(store$1, it, metadata);
+           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) {
+         var STATE = sharedKey$3('state');
+         hiddenKeys$5[STATE] = true;
+         set$4 = function (it, metadata) {
+           if (hasOwn$j(it, STATE)) throw new TypeError$j(OBJECT_ALREADY_INITIALIZED);
            metadata.facade = it;
-           createNonEnumerableProperty(it, STATE, metadata);
+           createNonEnumerableProperty$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$k = descriptors;
+       var hasOwn$i = hasOwnProperty_1;
+
+       var FunctionPrototype$2 = Function.prototype;
+       // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+       var getDescriptor = DESCRIPTORS$k && Object.getOwnPropertyDescriptor;
+
+       var EXISTS = hasOwn$i(FunctionPrototype$2, 'name');
+       // additional protection from minified / mangled / dropped function names
+       var PROPER = EXISTS && (function something() { /* empty */ }).name === 'something';
+       var CONFIGURABLE = EXISTS && (!DESCRIPTORS$k || (DESCRIPTORS$k && getDescriptor(FunctionPrototype$2, 'name').configurable));
+
+       var functionName = {
+         EXISTS: EXISTS,
+         PROPER: PROPER,
+         CONFIGURABLE: CONFIGURABLE
+       };
+
+       var global$15 = global$1o;
+       var isCallable$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$h.exports = function (O, key, value, options) {
          var unsafe = options ? !!options.unsafe : false;
          var simple = options ? !!options.enumerable : false;
          var noTargetGet = options ? !!options.noTargetGet : false;
+         var name = options && options.name !== undefined ? options.name : key;
          var state;
-         if (typeof value == 'function') {
-           if (typeof key == 'string' && !has(value, 'name')) {
-             createNonEnumerableProperty(value, 'name', key);
+         if (isCallable$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(value);
+           state = enforceInternalState$1(value);
            if (!state.source) {
-             state.source = TEMPLATE.join(typeof key == 'string' ? key : '');
+             state.source = TEMPLATE.join(typeof name == 'string' ? name : '');
            }
          }
-         if (O === global_1) {
+         if (O === global$15) {
            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$5 = Math.max;
+       var min$9 = Math.min;
 
-       // `ToInteger` abstract operation
-       // https://tc39.es/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$9 = function (index, length) {
+         var integer = toIntegerOrInfinity$a(index);
+         return integer < 0 ? max$5(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.es/ecma262/#sec-tolength
-       var toLength = function (argument) {
-         return argument > 0 ? min(toInteger(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991
+       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$1(integer, length);
+       // `LengthOfArrayLike` abstract operation
+       // https://tc39.es/ecma262/#sec-lengthofarraylike
+       var lengthOfArrayLike$i = function (obj) {
+         return toLength$b(obj.length);
        };
 
+       var toIndexedObject$b = toIndexedObject$d;
+       var toAbsoluteIndex$8 = toAbsoluteIndex$9;
+       var lengthOfArrayLike$h = lengthOfArrayLike$i;
+
        // `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($this);
-           var length = toLength(O.length);
-           var index = toAbsoluteIndex(fromIndex, length);
+           var O = toIndexedObject$b($this);
+           var length = lengthOfArrayLike$h(O);
+           var index = toAbsoluteIndex$8(fromIndex, length);
            var value;
            // Array#includes uses SameValueZero equality algorithm
            // eslint-disable-next-line no-self-compare -- NaN check
        var arrayIncludes = {
          // `Array.prototype.includes` method
          // https://tc39.es/ecma262/#sec-array.prototype.includes
-         includes: createMethod(true),
+         includes: createMethod$6(true),
          // `Array.prototype.indexOf` method
          // https://tc39.es/ecma262/#sec-array.prototype.indexof
-         indexOf: createMethod(false)
+         indexOf: createMethod$6(false)
        };
 
-       var indexOf = arrayIncludes.indexOf;
+       var uncurryThis$Q = functionUncurryThis;
+       var hasOwn$g = hasOwnProperty_1;
+       var toIndexedObject$a = toIndexedObject$d;
+       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$a(object);
          var i = 0;
          var result = [];
          var key;
-         for (key in O) !has(hiddenKeys, key) && has(O, key) && result.push(key);
+         for (key in O) !hasOwn$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.es/ecma262/#sec-object.getownpropertynames
-       var f$3 = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {
-         return objectKeysInternal(O, hiddenKeys$1);
+       // 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, exceptions) {
          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) && !(exceptions && hasOwn$f(exceptions, key))) {
+             defineProperty(target, key, getOwnPropertyDescriptor(source, key));
+           }
          }
        };
 
+       var fails$O = fails$V;
+       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$O(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$14 = global$1o;
+       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$14;
          } else if (STATIC) {
-           target = global_1[TARGET] || setGlobal(TARGET, {});
+           target = global$14[TARGET] || setGlobal(TARGET, {});
          } else {
-           target = (global_1[TARGET] || {}).prototype;
+           target = (global$14[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 $$1e = _export;
+       var global$13 = global$1o;
+       var uncurryThis$O = functionUncurryThis;
+
+       var Date$1 = global$13.Date;
+       var getTime$2 = uncurryThis$O(Date$1.prototype.getTime);
+
        // `Date.now` method
        // https://tc39.es/ecma262/#sec-date.now
-       _export({ target: 'Date', stat: true }, {
+       $$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.es/ecma262/#sec-date.prototype.tostring
-       if (new Date(NaN) + '' != INVALID_DATE) {
-         redefine(DatePrototype, TO_STRING, function toString() {
-           var value = getTime.call(this);
+       if (String(new Date(NaN)) != INVALID_DATE) {
+         redefine$f(DatePrototype$1, TO_STRING$1, function toString() {
+           var value = getTime$1(this);
            // eslint-disable-next-line no-self-compare -- NaN check
-           return value === value ? nativeDateToString.call(this) : INVALID_DATE;
+           return value === value ? un$DateToString(this) : INVALID_DATE;
          });
        }
 
        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);
+         return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) {
+           return typeof obj;
+         } : function (obj) {
+           return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
+         }, _typeof(obj);
        }
 
-       function _classCallCheck(instance, Constructor) {
+       function _classCallCheck$1(instance, Constructor) {
          if (!(instance instanceof Constructor)) {
            throw new TypeError("Cannot call a class as a function");
          }
        }
 
-       function _defineProperties(target, props) {
+       function _defineProperties$1(target, props) {
          for (var i = 0; i < props.length; i++) {
            var descriptor = props[i];
            descriptor.enumerable = descriptor.enumerable || false;
          }
        }
 
-       function _createClass(Constructor, protoProps, staticProps) {
-         if (protoProps) _defineProperties(Constructor.prototype, protoProps);
-         if (staticProps) _defineProperties(Constructor, staticProps);
+       function _createClass$1(Constructor, protoProps, staticProps) {
+         if (protoProps) _defineProperties$1(Constructor.prototype, protoProps);
+         if (staticProps) _defineProperties$1(Constructor, staticProps);
+         Object.defineProperty(Constructor, "prototype", {
+           writable: false
+         });
          return Constructor;
        }
 
        }
 
        function _iterableToArray(iter) {
-         if (typeof Symbol !== "undefined" && Symbol.iterator in Object(iter)) return Array.from(iter);
+         if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter);
        }
 
        function _iterableToArrayLimit(arr, i) {
-         if (typeof Symbol === "undefined" || !(Symbol.iterator in Object(arr))) return;
+         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 _e = undefined;
+
+         var _s, _e;
 
          try {
-           for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
+           for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) {
              _arr.push(_s.value);
 
              if (i && _arr.length === i) break;
        }
 
        function _createForOfIteratorHelper(o, allowArrayLike) {
-         var it;
+         var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"];
 
-         if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) {
+         if (!it) {
            if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
              if (it) o = it;
              var i = 0;
              err;
          return {
            s: function () {
-             it = o[Symbol.iterator]();
+             it = it.call(o);
            },
            n: function () {
              var step = it.next();
          };
        }
 
-       var engineIsNode = classofRaw(global_1.process) == 'process';
-
-       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 $$1d = _export;
+       var global$12 = global$1o;
 
-       var nativeSymbol = !!Object.getOwnPropertySymbols && !fails(function () {
-         /* global Symbol -- required for testing */
-         return !Symbol.sham &&
-           // Chrome 38 Symbol has incorrect toString conversion
-           // Chrome 38-40 symbols are not inherited from DOM collections prototypes to instances
-           (engineIsNode ? engineV8Version === 38 : engineV8Version > 37 && engineV8Version < 41);
+       // `globalThis` object
+       // https://tc39.es/ecma262/#sec-globalthis
+       $$1d({ global: true }, {
+         globalThis: global$12
        });
 
-       var useSymbolAsUid = nativeSymbol
-         /* global Symbol -- safe */
-         && !Symbol.sham
-         && typeof Symbol.iterator == 'symbol';
+       var global$11 = global$1o;
 
-       var WellKnownSymbolsStore = shared('wks');
-       var Symbol$1 = global_1.Symbol;
-       var createWellKnownSymbol = useSymbolAsUid ? Symbol$1 : Symbol$1 && Symbol$1.withoutSetter || uid;
+       var path$1 = global$11;
 
-       var wellKnownSymbol = function (name) {
-         if (!has(WellKnownSymbolsStore, name) || !(nativeSymbol || typeof WellKnownSymbolsStore[name] == 'string')) {
-           if (nativeSymbol && has(Symbol$1, name)) {
-             WellKnownSymbolsStore[name] = Symbol$1[name];
-           } else {
-             WellKnownSymbolsStore[name] = createWellKnownSymbol('Symbol.' + name);
-           }
-         } return WellKnownSymbolsStore[name];
-       };
+       var wellKnownSymbolWrapped = {};
 
-       var f$5 = wellKnownSymbol;
+       var wellKnownSymbol$r = wellKnownSymbol$t;
 
-       var wellKnownSymbolWrapped = {
-               f: f$5
-       };
+       wellKnownSymbolWrapped.f = wellKnownSymbol$r;
 
-       var defineProperty = objectDefineProperty.f;
+       var path = path$1;
+       var hasOwn$e = hasOwnProperty_1;
+       var wrappedWellKnownSymbolModule$1 = wellKnownSymbolWrapped;
+       var defineProperty$c = objectDefineProperty.f;
 
-       var defineWellKnownSymbol = function (NAME) {
+       var defineWellKnownSymbol$4 = function (NAME) {
          var Symbol = path.Symbol || (path.Symbol = {});
-         if (!has(Symbol, NAME)) defineProperty(Symbol, NAME, {
-           value: wellKnownSymbolWrapped.f(NAME)
+         if (!hasOwn$e(Symbol, NAME)) defineProperty$c(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('iterator');
-
-       var TO_STRING_TAG = wellKnownSymbol('toStringTag');
-       var test = {};
-
-       test[TO_STRING_TAG] = 'z';
+       defineWellKnownSymbol$3('iterator');
 
-       var toStringTagSupport = String(test) === '[object z]';
+       var objectDefineProperties = {};
 
-       var TO_STRING_TAG$1 = 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 */ }
-       };
-
-       // 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$1)) == 'string' ? tag
-           // builtinTag case
-           : CORRECT_ARGUMENTS ? classofRaw(O)
-           // ES3 arguments fallback
-           : (result = classofRaw(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : result;
-       };
-
-       // `Object.prototype.toString` method implementation
-       // https://tc39.es/ecma262/#sec-object.prototype.tostring
-       var objectToString = toStringTagSupport ? {}.toString : function toString() {
-         return '[object ' + classof(this) + ']';
-       };
-
-       // `Object.prototype.toString` method
-       // https://tc39.es/ecma262/#sec-object.prototype.tostring
-       if (!toStringTagSupport) {
-         redefine(Object.prototype, 'toString', objectToString, { unsafe: true });
-       }
-
-       // `String.prototype.{ codePointAt, at }` methods implementation
-       var createMethod$1 = function (CONVERT_TO_STRING) {
-         return function ($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 stringMultibyte = {
-         // `String.prototype.codePointAt` method
-         // https://tc39.es/ecma262/#sec-string.prototype.codepointat
-         codeAt: createMethod$1(false),
-         // `String.prototype.at` method
-         // https://github.com/mathiasbynens/String.prototype.at
-         charAt: createMethod$1(true)
-       };
-
-       // `ToObject` abstract operation
-       // https://tc39.es/ecma262/#sec-toobject
-       var toObject = function (argument) {
-         return Object(requireObjectCoercible(argument));
-       };
-
-       var correctPrototypeGetter = !fails(function () {
-         function F() { /* empty */ }
-         F.prototype.constructor = null;
-         return Object.getPrototypeOf(new F()) !== F.prototype;
-       });
-
-       var IE_PROTO = sharedKey('IE_PROTO');
-       var ObjectPrototype = Object.prototype;
-
-       // `Object.getPrototypeOf` method
-       // https://tc39.es/ecma262/#sec-object.getprototypeof
-       var objectGetPrototypeOf = correctPrototypeGetter ? Object.getPrototypeOf : function (O) {
-         O = toObject(O);
-         if (has(O, IE_PROTO)) return O[IE_PROTO];
-         if (typeof O.constructor == 'function' && O instanceof O.constructor) {
-           return O.constructor.prototype;
-         } return O instanceof Object ? ObjectPrototype : null;
-       };
-
-       var ITERATOR = wellKnownSymbol('iterator');
-       var BUGGY_SAFARI_ITERATORS = false;
-
-       var returnThis = function () { return this; };
-
-       // `%IteratorPrototype%` object
-       // https://tc39.es/ecma262/#sec-%iteratorprototype%-object
-       var IteratorPrototype, PrototypeOfArrayIteratorPrototype, arrayIterator;
-
-       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;
-         }
-       }
-
-       var NEW_ITERATOR_PROTOTYPE = IteratorPrototype == undefined || fails(function () {
-         var test = {};
-         // FF44- legacy iterators case
-         return IteratorPrototype[ITERATOR].call(test) !== test;
-       });
-
-       if (NEW_ITERATOR_PROTOTYPE) IteratorPrototype = {};
-
-       // 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 internalObjectKeys = objectKeysInternal;
+       var enumBugKeys$1 = enumBugKeys$3;
 
        // `Object.keys` method
        // https://tc39.es/ecma262/#sec-object.keys
-       var objectKeys = Object.keys || function keys(O) {
-         return objectKeysInternal(O, enumBugKeys);
+       // eslint-disable-next-line es/no-object-keys -- safe
+       var objectKeys$4 = Object.keys || function keys(O) {
+         return internalObjectKeys(O, enumBugKeys$1);
        };
 
+       var DESCRIPTORS$j = descriptors;
+       var V8_PROTOTYPE_DEFINE_BUG = v8PrototypeDefineBug;
+       var definePropertyModule$5 = objectDefineProperty;
+       var anObject$k = anObject$n;
+       var toIndexedObject$9 = toIndexedObject$d;
+       var objectKeys$3 = objectKeys$4;
+
        // `Object.defineProperties` method
        // https://tc39.es/ecma262/#sec-object.defineproperties
-       var objectDefineProperties = descriptors ? Object.defineProperties : function defineProperties(O, Properties) {
-         anObject(O);
-         var keys = objectKeys(Properties);
+       // eslint-disable-next-line es/no-object-defineproperties -- safe
+       objectDefineProperties.f = DESCRIPTORS$j && !V8_PROTOTYPE_DEFINE_BUG ? Object.defineProperties : function defineProperties(O, Properties) {
+         anObject$k(O);
+         var props = toIndexedObject$9(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 definePropertiesModule$1 = 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$1 = 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 -- old IE */
-           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$1] = true;
+       hiddenKeys$2[IE_PROTO$1] = true;
 
        // `Object.create` method
        // 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$1] = O;
          } else result = NullProtoObject();
-         return Properties === undefined ? result : objectDefineProperties(result, Properties);
+         return Properties === undefined ? result : definePropertiesModule$1.f(result, Properties);
        };
 
-       var defineProperty$1 = objectDefineProperty.f;
-
+       var wellKnownSymbol$q = wellKnownSymbol$t;
+       var create$a = objectCreate;
+       var definePropertyModule$4 = objectDefineProperty;
 
+       var UNSCOPABLES = wellKnownSymbol$q('unscopables');
+       var ArrayPrototype$1 = Array.prototype;
 
-       var TO_STRING_TAG$2 = wellKnownSymbol('toStringTag');
+       // 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 setToStringTag = function (it, TAG, STATIC) {
-         if (it && !has(it = STATIC ? it : it.prototype, TO_STRING_TAG$2)) {
-           defineProperty$1(it, TO_STRING_TAG$2, { configurable: true, value: TAG });
-         }
+       // add a key to Array.prototype[@@unscopables]
+       var addToUnscopables$6 = function (key) {
+         ArrayPrototype$1[UNSCOPABLES][key] = true;
        };
 
        var iterators = {};
 
-       var IteratorPrototype$1 = iteratorsCore.IteratorPrototype;
+       var fails$N = fails$V;
+
+       var correctPrototypeGetter = !fails$N(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 global$10 = global$1o;
+       var hasOwn$d = hasOwnProperty_1;
+       var isCallable$h = isCallable$r;
+       var toObject$g = toObject$i;
+       var sharedKey$1 = sharedKey$4;
+       var CORRECT_PROTOTYPE_GETTER$1 = correctPrototypeGetter;
+
+       var IE_PROTO = sharedKey$1('IE_PROTO');
+       var Object$2 = global$10.Object;
+       var ObjectPrototype$4 = Object$2.prototype;
+
+       // `Object.getPrototypeOf` method
+       // https://tc39.es/ecma262/#sec-object.getprototypeof
+       var objectGetPrototypeOf = CORRECT_PROTOTYPE_GETTER$1 ? Object$2.getPrototypeOf : function (O) {
+         var object = toObject$g(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$4 : null;
+       };
+
+       var fails$M = fails$V;
+       var isCallable$g = isCallable$r;
+       var getPrototypeOf$4 = objectGetPrototypeOf;
+       var redefine$e = redefine$h.exports;
+       var wellKnownSymbol$p = wellKnownSymbol$t;
+
+       var ITERATOR$a = wellKnownSymbol$p('iterator');
+       var BUGGY_SAFARI_ITERATORS$1 = false;
+
+       // `%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$2 == undefined || fails$M(function () {
+         var test = {};
+         // FF44- legacy iterators case
+         return IteratorPrototype$2[ITERATOR$a].call(test) !== test;
+       });
 
+       if (NEW_ITERATOR_PROTOTYPE) IteratorPrototype$2 = {};
 
+       // `%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 iteratorsCore = {
+         IteratorPrototype: IteratorPrototype$2,
+         BUGGY_SAFARI_ITERATORS: BUGGY_SAFARI_ITERATORS$1
+       };
 
+       var defineProperty$b = objectDefineProperty.f;
+       var hasOwn$c = hasOwnProperty_1;
+       var wellKnownSymbol$o = wellKnownSymbol$t;
+
+       var TO_STRING_TAG$4 = wellKnownSymbol$o('toStringTag');
+
+       var setToStringTag$a = function (target, TAG, STATIC) {
+         if (target && !STATIC) target = target.prototype;
+         if (target && !hasOwn$c(target, TO_STRING_TAG$4)) {
+           defineProperty$b(target, TO_STRING_TAG$4, { configurable: true, value: TAG });
+         }
+       };
+
+       var IteratorPrototype$1 = iteratorsCore.IteratorPrototype;
+       var create$9 = objectCreate;
+       var createPropertyDescriptor$4 = createPropertyDescriptor$7;
+       var setToStringTag$9 = setToStringTag$a;
+       var Iterators$4 = iterators;
 
        var returnThis$1 = function () { return this; };
 
-       var createIteratorConstructor = function (IteratorConstructor, NAME, next) {
+       var createIteratorConstructor$2 = function (IteratorConstructor, NAME, next, ENUMERABLE_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;
+         IteratorConstructor.prototype = create$9(IteratorPrototype$1, { next: createPropertyDescriptor$4(+!ENUMERABLE_NEXT, next) });
+         setToStringTag$9(IteratorConstructor, TO_STRING_TAG, false);
+         Iterators$4[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;
+       var global$$ = global$1o;
+       var isCallable$f = isCallable$r;
+
+       var String$4 = global$$.String;
+       var TypeError$i = global$$.TypeError;
+
+       var aPossiblePrototype$1 = function (argument) {
+         if (typeof argument == 'object' || isCallable$f(argument)) return argument;
+         throw TypeError$i("Can't set " + String$4(argument) + ' as a prototype');
        };
 
        /* eslint-disable no-proto -- safe */
 
-
+       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 {
-           setter = Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set;
-           setter.call(test, []);
+           // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+           setter = uncurryThis$M(Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set);
+           setter(test, []);
            CORRECT_SETTER = test instanceof Array;
          } catch (error) { /* empty */ }
          return function setPrototypeOf(O, proto) {
-           anObject(O);
+           anObject$i(O);
            aPossiblePrototype(proto);
-           if (CORRECT_SETTER) setter.call(O, proto);
+           if (CORRECT_SETTER) setter(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 $$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$3 = 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$2 = function () { return this; };
+       var returnThis = function () { return this; };
 
-       var defineIterator = function (Iterable, NAME, IteratorConstructor, next, DEFAULT, IS_SET, FORCED) {
-         createIteratorConstructor(IteratorConstructor, NAME, next);
+       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$1 && KIND in IterablePrototype) return IterablePrototype[KIND];
+           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); };
          var TO_STRING_TAG = NAME + ' Iterator';
          var INCORRECT_VALUES_NAME = false;
          var IterablePrototype = Iterable.prototype;
-         var nativeIterator = IterablePrototype[ITERATOR$1]
+         var nativeIterator = IterablePrototype[ITERATOR$9]
            || IterablePrototype['@@iterator']
            || DEFAULT && IterablePrototype[DEFAULT];
-         var defaultIterator = !BUGGY_SAFARI_ITERATORS$1 && nativeIterator || getIterationMethod(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 = 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);
+           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(CurrentIteratorPrototype, TO_STRING_TAG, true);
+             setToStringTag$8(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);
+         // fix Array.prototype.{ values, @@iterator }.name in V8 / FF
+         if (PROPER_FUNCTION_NAME$3 && 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); };
+           }
          }
-         iterators[NAME] = defaultIterator;
 
          // export additional methods
          if (DEFAULT) {
              entries: getIterationMethod(ENTRIES)
            };
            if (FORCED) for (KEY in methods) {
-             if (BUGGY_SAFARI_ITERATORS$1 || INCORRECT_VALUES_NAME || !(KEY in IterablePrototype)) {
-               redefine(IterablePrototype, KEY, methods[KEY]);
+             if (BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME || !(KEY in IterablePrototype)) {
+               redefine$d(IterablePrototype, KEY, methods[KEY]);
              }
-           } else _export({ target: NAME, proto: true, forced: BUGGY_SAFARI_ITERATORS$1 || INCORRECT_VALUES_NAME }, methods);
+           } 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 charAt = stringMultibyte.charAt;
-
-
-
-       var STRING_ITERATOR = 'String Iterator';
-       var setInternalState = internalState.set;
-       var getInternalState = internalState.getterFor(STRING_ITERATOR);
-
-       // `String.prototype[@@iterator]` method
-       // https://tc39.es/ecma262/#sec-string.prototype-@@iterator
-       defineIterator(String, 'String', function (iterated) {
-         setInternalState(this, {
-           type: STRING_ITERATOR,
-           string: String(iterated),
-           index: 0
-         });
-       // `%StringIteratorPrototype%.next` method
-       // https://tc39.es/ecma262/#sec-%stringiteratorprototype%.next
-       }, function next() {
-         var state = getInternalState(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 };
-       });
-
-       var UNSCOPABLES = wellKnownSymbol('unscopables');
-       var ArrayPrototype = Array.prototype;
-
-       // Array.prototype[@@unscopables]
-       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
-       if (ArrayPrototype[UNSCOPABLES] == undefined) {
-         objectDefineProperty.f(ArrayPrototype, UNSCOPABLES, {
-           configurable: true,
-           value: objectCreate(null)
-         });
-       }
-
-       // add a key to Array.prototype[@@unscopables]
-       var addToUnscopables = function (key) {
-         ArrayPrototype[UNSCOPABLES][key] = true;
-       };
+       var toIndexedObject$8 = toIndexedObject$d;
+       var addToUnscopables$5 = addToUnscopables$6;
+       var Iterators$2 = iterators;
+       var InternalStateModule$8 = internalState;
+       var defineProperty$a = objectDefineProperty.f;
+       var defineIterator$2 = defineIterator$3;
+       var DESCRIPTORS$i = descriptors;
 
        var ARRAY_ITERATOR = 'Array Iterator';
-       var setInternalState$1 = internalState.set;
-       var getInternalState$1 = internalState.getterFor(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
        // https://tc39.es/ecma262/#sec-array.prototype-@@iterator
        // `CreateArrayIterator` internal method
        // https://tc39.es/ecma262/#sec-createarrayiterator
-       var es_array_iterator = defineIterator(Array, 'Array', function (iterated, kind) {
-         setInternalState$1(this, {
+       var es_array_iterator = defineIterator$2(Array, 'Array', function (iterated, kind) {
+         setInternalState$8(this, {
            type: ARRAY_ITERATOR,
-           target: toIndexedObject(iterated), // target
+           target: toIndexedObject$8(iterated), // target
            index: 0,                          // next index
            kind: kind                         // kind
          });
        // `%ArrayIteratorPrototype%.next` method
        // https://tc39.es/ecma262/#sec-%arrayiteratorprototype%.next
        }, function () {
-         var state = getInternalState$1(this);
+         var state = getInternalState$6(this);
          var target = state.target;
          var kind = state.kind;
          var index = state.index++;
        // argumentsList[@@iterator] is %ArrayProto_values%
        // https://tc39.es/ecma262/#sec-createunmappedargumentsobject
        // https://tc39.es/ecma262/#sec-createmappedargumentsobject
-       iterators.Arguments = iterators.Array;
+       var values = Iterators$2.Arguments = Iterators$2.Array;
 
        // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
-       addToUnscopables('keys');
-       addToUnscopables('values');
-       addToUnscopables('entries');
+       addToUnscopables$5('keys');
+       addToUnscopables$5('values');
+       addToUnscopables$5('entries');
+
+       // V8 ~ Chrome 45- bug
+       if (DESCRIPTORS$i && values.name !== 'values') try {
+         defineProperty$a(values, 'name', { value: 'values' });
+       } catch (error) { /* empty */ }
+
+       var wellKnownSymbol$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$2) === '[object z]';
+
+       var global$_ = global$1o;
+       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$1 = global$_.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$l, { unsafe: true });
+       }
+
+       var global$Z = global$1o;
+       var classof$b = classof$d;
+
+       var String$3 = global$Z.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
          TouchList: 0
        };
 
-       var ITERATOR$2 = wellKnownSymbol('iterator');
-       var TO_STRING_TAG$3 = wellKnownSymbol('toStringTag');
-       var ArrayValues = es_array_iterator.values;
+       // 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$2;
+
+       var global$Y = global$1o;
+       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;
 
-       for (var COLLECTION_NAME in domIterables) {
-         var Collection = global_1[COLLECTION_NAME];
-         var CollectionPrototype = Collection && Collection.prototype;
+       var handlePrototype$1 = function (CollectionPrototype, COLLECTION_NAME) {
          if (CollectionPrototype) {
            // some Chrome versions have non-configurable methods on DOMTokenList
-           if (CollectionPrototype[ITERATOR$2] !== ArrayValues) try {
-             createNonEnumerableProperty(CollectionPrototype, ITERATOR$2, ArrayValues);
+           if (CollectionPrototype[ITERATOR$8] !== ArrayValues) try {
+             createNonEnumerableProperty$6(CollectionPrototype, ITERATOR$8, ArrayValues);
            } catch (error) {
-             CollectionPrototype[ITERATOR$2] = ArrayValues;
+             CollectionPrototype[ITERATOR$8] = ArrayValues;
            }
-           if (!CollectionPrototype[TO_STRING_TAG$3]) {
-             createNonEnumerableProperty(CollectionPrototype, TO_STRING_TAG$3, COLLECTION_NAME);
+           if (!CollectionPrototype[TO_STRING_TAG$1]) {
+             createNonEnumerableProperty$6(CollectionPrototype, TO_STRING_TAG$1, COLLECTION_NAME);
            }
-           if (domIterables[COLLECTION_NAME]) for (var METHOD_NAME in es_array_iterator) {
+           if (DOMIterables$1[COLLECTION_NAME]) for (var METHOD_NAME in ArrayIteratorMethods) {
              // some Chrome versions have non-configurable methods on DOMTokenList
-             if (CollectionPrototype[METHOD_NAME] !== es_array_iterator[METHOD_NAME]) try {
-               createNonEnumerableProperty(CollectionPrototype, METHOD_NAME, es_array_iterator[METHOD_NAME]);
+             if (CollectionPrototype[METHOD_NAME] !== ArrayIteratorMethods[METHOD_NAME]) try {
+               createNonEnumerableProperty$6(CollectionPrototype, METHOD_NAME, ArrayIteratorMethods[METHOD_NAME]);
              } catch (error) {
-               CollectionPrototype[METHOD_NAME] = es_array_iterator[METHOD_NAME];
+               CollectionPrototype[METHOD_NAME] = ArrayIteratorMethods[METHOD_NAME];
              }
            }
          }
+       };
+
+       for (var COLLECTION_NAME$1 in DOMIterables$1) {
+         handlePrototype$1(global$Y[COLLECTION_NAME$1] && global$Y[COLLECTION_NAME$1].prototype, COLLECTION_NAME$1);
        }
 
+       handlePrototype$1(DOMTokenListPrototype$1, 'DOMTokenList');
+
+       var NATIVE_BIND$2 = functionBindNative;
+
+       var FunctionPrototype$1 = Function.prototype;
+       var apply$9 = FunctionPrototype$1.apply;
+       var call$k = FunctionPrototype$1.call;
+
+       // eslint-disable-next-line es/no-reflect -- safe
+       var functionApply = typeof Reflect == 'object' && Reflect.apply || (NATIVE_BIND$2 ? call$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
-       var isArray = Array.isArray || function isArray(arg) {
-         return classofRaw(arg) == 'Array';
+       // 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 toPropertyKey$2 = toPropertyKey$5;
+       var definePropertyModule$3 = objectDefineProperty;
+       var createPropertyDescriptor$3 = createPropertyDescriptor$7;
+
+       var createProperty$5 = function (object, key, value) {
+         var propertyKey = toPropertyKey$2(key);
+         if (propertyKey in object) definePropertyModule$3.f(object, propertyKey, createPropertyDescriptor$3(0, value));
+         else object[propertyKey] = value;
        };
 
-       var nativeGetOwnPropertyNames = objectGetOwnPropertyNames.f;
+       var global$X = global$1o;
+       var toAbsoluteIndex$7 = toAbsoluteIndex$9;
+       var lengthOfArrayLike$g = lengthOfArrayLike$i;
+       var createProperty$4 = createProperty$5;
+
+       var Array$7 = global$X.Array;
+       var max$4 = Math.max;
+
+       var arraySliceSimple = function (O, start, end) {
+         var length = lengthOfArrayLike$g(O);
+         var k = toAbsoluteIndex$7(start, length);
+         var fin = toAbsoluteIndex$7(end === undefined ? length : end, length);
+         var result = Array$7(max$4(fin - k, 0));
+         for (var n = 0; k < fin; k++, n++) createProperty$4(result, n, O[k]);
+         result.length = n;
+         return result;
+       };
 
-       var toString$1 = {}.toString;
+       /* eslint-disable es/no-object-getownpropertynames -- safe */
+
+       var classof$9 = classofRaw$1;
+       var toIndexedObject$7 = toIndexedObject$d;
+       var $getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;
+       var arraySlice$c = arraySliceSimple;
 
        var windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames
          ? Object.getOwnPropertyNames(window) : [];
 
        var getWindowNames = function (it) {
          try {
-           return nativeGetOwnPropertyNames(it);
+           return $getOwnPropertyNames$1(it);
          } catch (error) {
-           return windowNames.slice();
+           return arraySlice$c(windowNames);
          }
        };
 
        // fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window
-       var f$6 = function getOwnPropertyNames(it) {
-         return windowNames && toString$1.call(it) == '[object Window]'
+       objectGetOwnPropertyNamesExternal.f = function getOwnPropertyNames(it) {
+         return windowNames && classof$9(it) == 'Window'
            ? getWindowNames(it)
-           : nativeGetOwnPropertyNames(toIndexedObject(it));
+           : $getOwnPropertyNames$1(toIndexedObject$7(it));
        };
 
-       var objectGetOwnPropertyNamesExternal = {
-               f: f$6
-       };
+       var uncurryThis$K = functionUncurryThis;
 
-       var aFunction$1 = function (it) {
-         if (typeof it != 'function') {
-           throw TypeError(String(it) + ' is not a function');
-         } return it;
-       };
+       var arraySlice$b = uncurryThis$K([].slice);
+
+       var uncurryThis$J = functionUncurryThis;
+       var aCallable$8 = aCallable$a;
+       var NATIVE_BIND$1 = functionBindNative;
+
+       var bind$f = uncurryThis$J(uncurryThis$J.bind);
 
        // 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 */) {
+       var functionBindContext = function (fn, that) {
+         aCallable$8(fn);
+         return that === undefined ? fn : NATIVE_BIND$1 ? bind$f(fn, that) : function (/* ...args */) {
            return fn.apply(that, arguments);
          };
        };
 
-       var SPECIES = wellKnownSymbol('species');
+       var uncurryThis$I = functionUncurryThis;
+       var fails$L = fails$V;
+       var isCallable$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$2);
+
+       var isConstructorModern = function isConstructor(argument) {
+         if (!isCallable$c(argument)) return false;
+         try {
+           construct$1(noop$2, empty$1, argument);
+           return true;
+         } catch (error) {
+           return false;
+         }
+       };
 
-       // `ArraySpeciesCreate` abstract operation
+       var isConstructorLegacy = function isConstructor(argument) {
+         if (!isCallable$c(argument)) return false;
+         switch (classof$8(argument)) {
+           case 'AsyncFunction':
+           case 'GeneratorFunction':
+           case 'AsyncGeneratorFunction': return false;
+         }
+         try {
+           // we can't check .prototype since constructors produced by .bind haven't it
+           // `Function#toString` throws on some built-it function in some legacy engines
+           // (for example, `DOMQuad` and similar in FF41-)
+           return INCORRECT_TO_STRING || !!exec$6(constructorRegExp, inspectSource$1(argument));
+         } catch (error) {
+           return true;
+         }
+       };
+
+       isConstructorLegacy.sham = true;
+
+       // `IsConstructor` abstract operation
+       // https://tc39.es/ecma262/#sec-isconstructor
+       var isConstructor$4 = !construct$1 || fails$L(function () {
+         var called;
+         return isConstructorModern(isConstructorModern.call)
+           || !isConstructorModern(Object)
+           || !isConstructorModern(function () { called = true; })
+           || called;
+       }) ? isConstructorLegacy : isConstructorModern;
+
+       var global$W = global$1o;
+       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$6 = global$W.Array;
+
+       // a part of `ArraySpeciesCreate` abstract operation
        // https://tc39.es/ecma262/#sec-arrayspeciescreate
-       var arraySpeciesCreate = function (originalArray, length) {
+       var arraySpeciesConstructor$1 = function (originalArray) {
          var C;
-         if (isArray(originalArray)) {
+         if (isArray$7(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 (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 new (C === undefined ? Array : C)(length === 0 ? 0 : length);
+         } return C === undefined ? Array$6 : C;
        };
 
-       var push = [].push;
+       var arraySpeciesConstructor = arraySpeciesConstructor$1;
 
-       // `Array.prototype.{ forEach, map, filter, some, every, find, findIndex, filterOut }` methods implementation
-       var createMethod$2 = function (TYPE) {
+       // `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$3 = indexedObject;
+       var toObject$f = toObject$i;
+       var lengthOfArrayLike$f = lengthOfArrayLike$i;
+       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$4 = function (TYPE) {
          var IS_MAP = TYPE == 1;
          var IS_FILTER = TYPE == 2;
          var IS_SOME = TYPE == 3;
          var IS_EVERY = TYPE == 4;
          var IS_FIND_INDEX = TYPE == 6;
-         var IS_FILTER_OUT = TYPE == 7;
+         var IS_FILTER_REJECT = TYPE == 7;
          var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;
          return function ($this, callbackfn, that, specificCreate) {
-           var O = toObject($this);
-           var self = indexedObject(O);
-           var boundFunction = functionBindContext(callbackfn, that, 3);
-           var length = toLength(self.length);
+           var O = toObject$f($this);
+           var self = IndexedObject$3(O);
+           var boundFunction = bind$e(callbackfn, that);
+           var length = lengthOfArrayLike$f(self);
            var index = 0;
-           var create = specificCreate || arraySpeciesCreate;
-           var target = IS_MAP ? create($this, length) : IS_FILTER || IS_FILTER_OUT ? create($this, 0) : undefined;
+           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];
                  case 3: return true;              // some
                  case 5: return value;             // find
                  case 6: return index;             // findIndex
-                 case 2: push.call(target, value); // filter
+                 case 2: push$9(target, value);      // filter
                } else switch (TYPE) {
                  case 4: return false;             // every
-                 case 7: push.call(target, value); // filterOut
+                 case 7: push$9(target, value);      // filterReject
                }
              }
            }
        var arrayIteration = {
          // `Array.prototype.forEach` method
          // https://tc39.es/ecma262/#sec-array.prototype.foreach
-         forEach: createMethod$2(0),
+         forEach: createMethod$4(0),
          // `Array.prototype.map` method
          // https://tc39.es/ecma262/#sec-array.prototype.map
-         map: createMethod$2(1),
+         map: createMethod$4(1),
          // `Array.prototype.filter` method
          // https://tc39.es/ecma262/#sec-array.prototype.filter
-         filter: createMethod$2(2),
+         filter: createMethod$4(2),
          // `Array.prototype.some` method
          // https://tc39.es/ecma262/#sec-array.prototype.some
-         some: createMethod$2(3),
+         some: createMethod$4(3),
          // `Array.prototype.every` method
          // https://tc39.es/ecma262/#sec-array.prototype.every
-         every: createMethod$2(4),
+         every: createMethod$4(4),
          // `Array.prototype.find` method
          // https://tc39.es/ecma262/#sec-array.prototype.find
-         find: createMethod$2(5),
+         find: createMethod$4(5),
          // `Array.prototype.findIndex` method
          // https://tc39.es/ecma262/#sec-array.prototype.findIndex
-         findIndex: createMethod$2(6),
-         // `Array.prototype.filterOut` method
+         findIndex: createMethod$4(6),
+         // `Array.prototype.filterReject` method
          // https://github.com/tc39/proposal-array-filtering
-         filterOut: createMethod$2(7)
+         filterReject: createMethod$4(7)
        };
 
-       var $forEach = arrayIteration.forEach;
+       var $$1b = _export;
+       var global$V = global$1o;
+       var getBuiltIn$5 = getBuiltIn$b;
+       var apply$8 = functionApply;
+       var call$j = functionCall;
+       var uncurryThis$G = functionUncurryThis;
+       var DESCRIPTORS$h = descriptors;
+       var NATIVE_SYMBOL$1 = nativeSymbol;
+       var fails$K = fails$V;
+       var hasOwn$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$n;
+       var toObject$e = toObject$i;
+       var toIndexedObject$6 = toIndexedObject$d;
+       var toPropertyKey$1 = toPropertyKey$5;
+       var $toString$3 = toString$k;
+       var createPropertyDescriptor$2 = 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$2 = objectDefineProperty;
+       var definePropertiesModule = objectDefineProperties;
+       var propertyIsEnumerableModule$1 = objectPropertyIsEnumerable;
+       var arraySlice$a = arraySlice$b;
+       var redefine$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('toPrimitive');
-       var setInternalState$2 = internalState.set;
-       var getInternalState$2 = internalState.getterFor(SYMBOL);
-       var ObjectPrototype$1 = 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$1 = shared('wks');
-       var QObject = global_1.QObject;
+       var TO_PRIMITIVE = wellKnownSymbol$i('toPrimitive');
+
+       var setInternalState$6 = InternalStateModule$6.set;
+       var getInternalState$4 = InternalStateModule$6.getterFor(SYMBOL);
+
+       var ObjectPrototype$3 = Object[PROTOTYPE$1];
+       var $Symbol = global$V.Symbol;
+       var SymbolPrototype$1 = $Symbol && $Symbol[PROTOTYPE$1];
+       var TypeError$h = global$V.TypeError;
+       var QObject = global$V.QObject;
+       var $stringify = getBuiltIn$5('JSON', 'stringify');
+       var nativeGetOwnPropertyDescriptor$2 = getOwnPropertyDescriptorModule$2.f;
+       var nativeDefineProperty$1 = definePropertyModule$2.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 && fails(function () {
-         return objectCreate(nativeDefineProperty$1({}, 'a', {
+       var setSymbolDescriptor = DESCRIPTORS$h && fails$K(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$1(ObjectPrototype$1, P);
-         if (ObjectPrototypeDescriptor) delete ObjectPrototype$1[P];
+         var ObjectPrototypeDescriptor = nativeGetOwnPropertyDescriptor$2(ObjectPrototype$3, P);
+         if (ObjectPrototypeDescriptor) delete ObjectPrototype$3[P];
          nativeDefineProperty$1(O, P, Attributes);
-         if (ObjectPrototypeDescriptor && O !== ObjectPrototype$1) {
-           nativeDefineProperty$1(ObjectPrototype$1, P, ObjectPrototypeDescriptor);
+         if (ObjectPrototypeDescriptor && O !== ObjectPrototype$3) {
+           nativeDefineProperty$1(ObjectPrototype$3, P, ObjectPrototypeDescriptor);
          }
        } : nativeDefineProperty$1;
 
-       var wrap = function (tag, description) {
-         var symbol = AllSymbols[tag] = objectCreate($Symbol[PROTOTYPE$1]);
-         setInternalState$2(symbol, {
+       var wrap$2 = function (tag, description) {
+         var symbol = AllSymbols[tag] = nativeObjectCreate(SymbolPrototype$1);
+         setInternalState$6(symbol, {
            type: SYMBOL,
            tag: tag,
            description: description
          });
-         if (!descriptors) symbol.description = description;
+         if (!DESCRIPTORS$h) symbol.description = description;
          return symbol;
        };
 
-       var isSymbol = useSymbolAsUid ? function (it) {
-         return typeof it == 'symbol';
-       } : function (it) {
-         return Object(it) instanceof $Symbol;
-       };
-
        var $defineProperty = function defineProperty(O, P, Attributes) {
-         if (O === ObjectPrototype$1) $defineProperty(ObjectPrototypeSymbols, P, Attributes);
-         anObject(O);
-         var key = toPrimitive(P, true);
-         anObject(Attributes);
-         if (has(AllSymbols, key)) {
+         if (O === ObjectPrototype$3) $defineProperty(ObjectPrototypeSymbols, P, Attributes);
+         anObject$h(O);
+         var key = toPropertyKey$1(P);
+         anObject$h(Attributes);
+         if (hasOwn$b(AllSymbols, key)) {
            if (!Attributes.enumerable) {
-             if (!has(O, HIDDEN)) nativeDefineProperty$1(O, HIDDEN, createPropertyDescriptor(1, {}));
+             if (!hasOwn$b(O, HIDDEN)) nativeDefineProperty$1(O, HIDDEN, createPropertyDescriptor$2(1, {}));
              O[HIDDEN][key] = true;
            } else {
-             if (has(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;
-             Attributes = objectCreate(Attributes, { enumerable: createPropertyDescriptor(0, false) });
+             if (hasOwn$b(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;
+             Attributes = nativeObjectCreate(Attributes, { enumerable: createPropertyDescriptor$2(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$6(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$1 && 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$1(V);
+         var enumerable = call$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$1 && 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$6(O);
+         var key = toPropertyKey$1(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$6(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$1;
-         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$6(O));
          var result = [];
-         $forEach(names, function (key) {
-           if (has(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || has(ObjectPrototype$1, 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.es/ecma262/#sec-symbol-constructor
-       if (!nativeSymbol) {
+       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$1, this)) throw TypeError$h('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$1) 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$2(1, value));
            };
-           if (descriptors && USE_SETTER) setSymbolDescriptor(ObjectPrototype$1, tag, { configurable: true, set: setter });
-           return wrap(tag, description);
+           if (DESCRIPTORS$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$2(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$2.f = $defineProperty;
+         definePropertiesModule.f = $defineProperties;
+         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$2(this).description;
+               return getInternalState$4(this).description;
              }
            });
            {
-             redefine(ObjectPrototype$1, '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.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;
          // `Symbol.keyFor` method
          // 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$3(sym)) throw TypeError$h(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.es/ecma262/#sec-object.create
          create: $create,
          getOwnPropertyDescriptor: $getOwnPropertyDescriptor
        });
 
-       _export({ target: 'Object', stat: true, forced: !nativeSymbol }, {
+       $$1b({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL$1 }, {
          // `Object.getOwnPropertyNames` method
          // https://tc39.es/ecma262/#sec-object.getownpropertynames
          getOwnPropertyNames: $getOwnPropertyNames,
 
        // 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$K(function () { getOwnPropertySymbolsModule$1.f(1); }) }, {
          getOwnPropertySymbols: function getOwnPropertySymbols(it) {
-           return objectGetOwnPropertySymbols.f(toObject(it));
+           return getOwnPropertySymbolsModule$1.f(toObject$e(it));
          }
        });
 
        // `JSON.stringify` method behavior with symbols
        // https://tc39.es/ecma262/#sec-json.stringify
        if ($stringify) {
-         var FORCED_JSON_STRINGIFY = !nativeSymbol || fails(function () {
+         var FORCED_JSON_STRINGIFY = !NATIVE_SYMBOL$1 || fails$K(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 }, {
+         $$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.es/ecma262/#sec-symbol.prototype-@@toprimitive
-       if (!$Symbol[PROTOTYPE$1][TO_PRIMITIVE]) {
-         createNonEnumerableProperty($Symbol[PROTOTYPE$1], TO_PRIMITIVE, $Symbol[PROTOTYPE$1].valueOf);
+       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.es/ecma262/#sec-symbol.prototype-@@tostringtag
-       setToStringTag($Symbol, SYMBOL);
-
-       hiddenKeys[HIDDEN] = true;
-
-       var defineProperty$2 = objectDefineProperty.f;
-
+       setToStringTag$7($Symbol, SYMBOL);
+
+       hiddenKeys$1[HIDDEN] = true;
+
+       var $$1a = _export;
+       var DESCRIPTORS$g = descriptors;
+       var global$U = global$1o;
+       var uncurryThis$F = functionUncurryThis;
+       var hasOwn$a = hasOwnProperty_1;
+       var isCallable$a = isCallable$r;
+       var isPrototypeOf$7 = objectIsPrototypeOf;
+       var toString$h = toString$k;
+       var defineProperty$9 = objectDefineProperty.f;
+       var copyConstructorProperties = copyConstructorProperties$2;
 
-       var NativeSymbol = global_1.Symbol;
+       var NativeSymbol = global$U.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$9(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
          });
        }
 
-       var arrayBufferNative = typeof ArrayBuffer !== 'undefined' && typeof DataView !== 'undefined';
+       // eslint-disable-next-line es/no-typed-arrays -- safe
+       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);
+       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 anInstance = function (it, Constructor, name) {
-         if (!(it instanceof Constructor)) {
-           throw TypeError('Incorrect ' + (name ? name + ' ' : '') + 'invocation');
-         } return it;
+       var global$T = global$1o;
+       var isPrototypeOf$6 = objectIsPrototypeOf;
+
+       var TypeError$g = global$T.TypeError;
+
+       var anInstance$7 = function (it, Prototype) {
+         if (isPrototypeOf$6(Prototype, it)) return it;
+         throw TypeError$g('Incorrect invocation');
        };
 
+       var global$S = global$1o;
+       var toIntegerOrInfinity$7 = toIntegerOrInfinity$b;
+       var toLength$a = toLength$c;
+
+       var RangeError$b = global$S.RangeError;
+
        // `ToIndex` abstract operation
        // https://tc39.es/ecma262/#sec-toindex
-       var toIndex = function (it) {
+       var toIndex$2 = function (it) {
          if (it === undefined) return 0;
-         var number = toInteger(it);
-         var length = toLength(number);
-         if (number !== length) throw RangeError('Wrong length or index');
+         var number = toIntegerOrInfinity$7(it);
+         var length = toLength$a(number);
+         if (number !== length) throw RangeError$b('Wrong length or index');
          return length;
        };
 
        // IEEE754 conversions based on https://github.com/feross/ieee754
-       var abs = Math.abs;
-       var pow = Math.pow;
-       var floor$1 = Math.floor;
-       var log = Math.log;
+       var global$R = global$1o;
+
+       var Array$5 = global$R.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;
 
        var pack = function (number, mantissaLength, bytes) {
-         var buffer = new Array(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, -24) - pow(2, -77) : 0;
+         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(number);
+         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$1(log(number) / LN2);
-           if (number * (c = pow(2, -exponent)) < 1) {
+           exponent = floor$7(log$2(number) / LN2);
+           c = pow$2(2, -exponent);
+           if (number * c < 1) {
              exponent--;
              c *= 2;
            }
            if (exponent + eBias >= 1) {
              number += rt / c;
            } else {
-             number += rt * pow(2, 1 - eBias);
+             number += rt * pow$2(2, 1 - eBias);
            }
            if (number * c >= 2) {
              exponent++;
              mantissa = 0;
              exponent = eMax;
            } else if (exponent + eBias >= 1) {
-             mantissa = (number * c - 1) * pow(2, mantissaLength);
+             mantissa = (number * c - 1) * pow$2(2, mantissaLength);
              exponent = exponent + eBias;
            } else {
-             mantissa = number * pow(2, eBias - 1) * pow(2, mantissaLength);
+             mantissa = number * pow$2(2, eBias - 1) * pow$2(2, mantissaLength);
              exponent = 0;
            }
          }
-         for (; mantissaLength >= 8; buffer[index++] = mantissa & 255, mantissa /= 256, mantissaLength -= 8);
+         while (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);
+         while (exponentLength > 0) {
+           buffer[index++] = exponent & 255;
+           exponent /= 256;
+           exponentLength -= 8;
+         }
          buffer[--index] |= sign * 128;
          return buffer;
        };
          var exponent = sign & 127;
          var mantissa;
          sign >>= 7;
-         for (; nBits > 0; exponent = exponent * 256 + buffer[index], index--, nBits -= 8);
+         while (nBits > 0) {
+           exponent = exponent * 256 + buffer[index--];
+           nBits -= 8;
+         }
          mantissa = exponent & (1 << -nBits) - 1;
          exponent >>= -nBits;
          nBits += mantissaLength;
-         for (; nBits > 0; mantissa = mantissa * 256 + buffer[index], index--, nBits -= 8);
+         while (nBits > 0) {
+           mantissa = mantissa * 256 + buffer[index--];
+           nBits -= 8;
+         }
          if (exponent === 0) {
            exponent = 1 - eBias;
          } else if (exponent === eMax) {
            return mantissa ? NaN : sign ? -Infinity : Infinity;
          } else {
-           mantissa = mantissa + pow(2, mantissaLength);
+           mantissa = mantissa + pow$2(2, mantissaLength);
            exponent = exponent - eBias;
-         } return (sign ? -1 : 1) * mantissa * pow(2, exponent - mantissaLength);
+         } return (sign ? -1 : 1) * mantissa * pow$2(2, exponent - mantissaLength);
        };
 
-       var ieee754 = {
+       var ieee754$2 = {
          pack: pack,
          unpack: unpack
        };
 
+       var toObject$d = toObject$i;
+       var toAbsoluteIndex$6 = toAbsoluteIndex$9;
+       var lengthOfArrayLike$e = lengthOfArrayLike$i;
+
        // `Array.prototype.fill` method implementation
        // https://tc39.es/ecma262/#sec-array.prototype.fill
-       var arrayFill = function fill(value /* , start = 0, end = @length */) {
-         var O = toObject(this);
-         var length = toLength(O.length);
+       var arrayFill$1 = function fill(value /* , start = 0, end = @length */) {
+         var O = toObject$d(this);
+         var length = lengthOfArrayLike$e(O);
          var argumentsLength = arguments.length;
-         var index = toAbsoluteIndex(argumentsLength > 1 ? arguments[1] : undefined, length);
+         var index = toAbsoluteIndex$6(argumentsLength > 1 ? arguments[1] : undefined, length);
          var end = argumentsLength > 2 ? arguments[2] : undefined;
-         var endPos = end === undefined ? length : toAbsoluteIndex(end, length);
+         var endPos = end === undefined ? length : toAbsoluteIndex$6(end, length);
          while (endPos > index) O[index++] = value;
          return O;
        };
 
-       var getOwnPropertyNames = objectGetOwnPropertyNames.f;
-       var defineProperty$3 = objectDefineProperty.f;
-
-
-
-
-       var getInternalState$3 = internalState.get;
-       var setInternalState$3 = internalState.set;
-       var ARRAY_BUFFER = 'ArrayBuffer';
+       var global$Q = global$1o;
+       var uncurryThis$E = functionUncurryThis;
+       var DESCRIPTORS$f = descriptors;
+       var NATIVE_ARRAY_BUFFER$2 = arrayBufferNative;
+       var FunctionName = functionName;
+       var createNonEnumerableProperty$5 = createNonEnumerableProperty$b;
+       var redefineAll$3 = redefineAll$4;
+       var fails$J = fails$V;
+       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$8 = objectDefineProperty.f;
+       var arrayFill = arrayFill$1;
+       var arraySlice$9 = arraySliceSimple;
+       var setToStringTag$6 = setToStringTag$a;
+       var InternalStateModule$5 = internalState;
+
+       var PROPER_FUNCTION_NAME$2 = 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$2 = 'prototype';
-       var WRONG_LENGTH = 'Wrong length';
+       var PROTOTYPE = 'prototype';
+       var WRONG_LENGTH$1 = '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 NativeArrayBuffer$1 = global$Q[ARRAY_BUFFER$1];
+       var $ArrayBuffer = NativeArrayBuffer$1;
+       var ArrayBufferPrototype$1 = $ArrayBuffer && $ArrayBuffer[PROTOTYPE];
+       var $DataView = global$Q[DATA_VIEW];
+       var DataViewPrototype$1 = $DataView && $DataView[PROTOTYPE];
        var ObjectPrototype$2 = Object.prototype;
-       var RangeError$1 = global_1.RangeError;
+       var Array$4 = global$Q.Array;
+       var RangeError$a = global$Q.RangeError;
+       var fill$1 = uncurryThis$E(arrayFill);
+       var reverse = uncurryThis$E([].reverse);
 
-       var packIEEE754 = ieee754.pack;
-       var unpackIEEE754 = ieee754.unpack;
+       var packIEEE754 = IEEE754.pack;
+       var unpackIEEE754 = IEEE754.unpack;
 
        var packInt8 = function (number) {
          return [number & 0xFF];
          return packIEEE754(number, 52, 8);
        };
 
-       var addGetter = function (Constructor, key) {
-         defineProperty$3(Constructor[PROTOTYPE$2], key, { get: function () { return getInternalState$3(this)[key]; } });
+       var addGetter$1 = function (Constructor, key) {
+         defineProperty$8(Constructor[PROTOTYPE], key, { get: function () { return getInternalState$3(this)[key]; } });
        };
 
-       var get$1 = function (view, count, index, isLittleEndian) {
-         var intIndex = toIndex(index);
+       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$1(WRONG_INDEX);
+         if (intIndex + count > store.byteLength) throw RangeError$a(WRONG_INDEX);
          var bytes = getInternalState$3(store.buffer).bytes;
          var start = intIndex + store.byteOffset;
-         var pack = bytes.slice(start, start + count);
-         return isLittleEndian ? pack : pack.reverse();
+         var pack = arraySlice$9(bytes, start, start + count);
+         return isLittleEndian ? pack : reverse(pack);
        };
 
-       var set$1 = function (view, count, index, conversion, value, isLittleEndian) {
-         var intIndex = toIndex(index);
+       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$1(WRONG_INDEX);
+         if (intIndex + count > store.byteLength) throw RangeError$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];
        };
 
-       if (!arrayBufferNative) {
+       if (!NATIVE_ARRAY_BUFFER$2) {
          $ArrayBuffer = function ArrayBuffer(length) {
-           anInstance(this, $ArrayBuffer, ARRAY_BUFFER);
-           var byteLength = toIndex(length);
-           setInternalState$3(this, {
-             bytes: arrayFill.call(new Array(byteLength), 0),
+           anInstance$6(this, ArrayBufferPrototype$1);
+           var byteLength = toIndex$1(length);
+           setInternalState$5(this, {
+             bytes: fill$1(Array$4(byteLength), 0),
              byteLength: byteLength
            });
-           if (!descriptors) this.byteLength = byteLength;
+           if (!DESCRIPTORS$f) this.byteLength = byteLength;
          };
 
+         ArrayBufferPrototype$1 = $ArrayBuffer[PROTOTYPE];
+
          $DataView = function DataView(buffer, byteOffset, byteLength) {
-           anInstance(this, $DataView, DATA_VIEW);
-           anInstance(buffer, $ArrayBuffer, DATA_VIEW);
+           anInstance$6(this, DataViewPrototype$1);
+           anInstance$6(buffer, ArrayBufferPrototype$1);
            var bufferLength = getInternalState$3(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$3(this, {
+           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$5(this, {
              buffer: buffer,
              byteLength: byteLength,
              byteOffset: offset
            });
-           if (!descriptors) {
+           if (!DESCRIPTORS$f) {
              this.buffer = buffer;
              this.byteLength = byteLength;
              this.byteOffset = offset;
            }
          };
 
-         if (descriptors) {
-           addGetter($ArrayBuffer, 'byteLength');
-           addGetter($DataView, 'buffer');
-           addGetter($DataView, 'byteLength');
-           addGetter($DataView, 'byteOffset');
+         DataViewPrototype$1 = $DataView[PROTOTYPE];
+
+         if (DESCRIPTORS$f) {
+           addGetter$1($ArrayBuffer, 'byteLength');
+           addGetter$1($DataView, 'buffer');
+           addGetter$1($DataView, 'byteLength');
+           addGetter$1($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 {
+         var INCORRECT_ARRAY_BUFFER_NAME = PROPER_FUNCTION_NAME$2 && NativeArrayBuffer$1.name !== ARRAY_BUFFER$1;
          /* eslint-disable no-new -- required for testing */
-         if (!fails(function () {
-           NativeArrayBuffer(1);
-         }) || !fails(function () {
-           new NativeArrayBuffer(-1);
-         }) || fails(function () {
-           new NativeArrayBuffer();
-           new NativeArrayBuffer(1.5);
-           new NativeArrayBuffer(NaN);
-           return NativeArrayBuffer.name != ARRAY_BUFFER;
+         if (!fails$J(function () {
+           NativeArrayBuffer$1(1);
+         }) || !fails$J(function () {
+           new NativeArrayBuffer$1(-1);
+         }) || fails$J(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
        };
 
-       // `DataView` constructor
-       // https://tc39.es/ecma262/#sec-dataview-constructor
-       _export({ global: true, forced: !arrayBufferNative }, {
-         DataView: arrayBuffer.DataView
-       });
+       var global$P = global$1o;
+       var isConstructor$2 = isConstructor$4;
+       var tryToString$3 = tryToString$5;
+
+       var TypeError$f = global$P.TypeError;
 
-       var SPECIES$1 = wellKnownSymbol('species');
+       // `Assert: IsConstructor(argument) is true`
+       var aConstructor$3 = function (argument) {
+         if (isConstructor$2(argument)) return argument;
+         throw TypeError$f(tryToString$3(argument) + ' is not a constructor');
+       };
+
+       var anObject$g = anObject$n;
+       var aConstructor$2 = aConstructor$3;
+       var wellKnownSymbol$h = wellKnownSymbol$t;
+
+       var SPECIES$5 = wellKnownSymbol$h('species');
 
        // `SpeciesConstructor` abstract operation
        // https://tc39.es/ecma262/#sec-speciesconstructor
-       var speciesConstructor = function (O, defaultConstructor) {
-         var C = anObject(O).constructor;
+       var speciesConstructor$5 = function (O, defaultConstructor) {
+         var C = anObject$g(O).constructor;
          var S;
-         return C === undefined || (S = anObject(C)[SPECIES$1]) == undefined ? defaultConstructor : aFunction$1(S);
+         return C === undefined || (S = anObject$g(C)[SPECIES$5]) == undefined ? defaultConstructor : aConstructor$2(S);
        };
 
-       var ArrayBuffer$1 = arrayBuffer.ArrayBuffer;
-       var DataView$1 = arrayBuffer.DataView;
-       var nativeArrayBufferSlice = ArrayBuffer$1.prototype.slice;
-
-       var INCORRECT_SLICE = fails(function () {
-         return !new ArrayBuffer$1(2).slice(1, undefined).byteLength;
+       var $$19 = _export;
+       var uncurryThis$D = functionUncurryThis;
+       var fails$I = fails$V;
+       var ArrayBufferModule$2 = arrayBuffer;
+       var anObject$f = anObject$n;
+       var toAbsoluteIndex$5 = toAbsoluteIndex$9;
+       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$D(DataViewPrototype.setUint8);
+
+       var INCORRECT_SLICE = fails$I(function () {
+         return !new ArrayBuffer$4(2).slice(1, undefined).byteLength;
        });
 
        // `ArrayBuffer.prototype.slice` method
        // https://tc39.es/ecma262/#sec-arraybuffer.prototype.slice
-       _export({ target: 'ArrayBuffer', proto: true, unsafe: true, forced: INCORRECT_SLICE }, {
+       $$19({ 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$1))(toLength(fin - first));
-           var viewSource = new DataView$1(this);
-           var viewTarget = new DataView$1(result);
+           if (un$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) {
-             viewTarget.setUint8(index++, viewSource.getUint8(first++));
+             setUint8(viewTarget, index++, getUint8(viewSource, first++));
            } return result;
          }
        });
 
-       var defineProperty$4 = objectDefineProperty.f;
-
+       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 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 TO_STRING_TAG$4 = wellKnownSymbol('toStringTag');
-       var TYPED_ARRAY_TAG = uid('TYPED_ARRAY_TAG');
+       var NATIVE_ARRAY_BUFFER = arrayBufferNative;
+       var DESCRIPTORS$e = descriptors;
+       var global$O = global$1o;
+       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$7 = 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$4 = global$O.Int8Array;
+       var Int8ArrayPrototype$1 = Int8Array$4 && Int8Array$4.prototype;
+       var Uint8ClampedArray$1 = global$O.Uint8ClampedArray;
+       var Uint8ClampedArrayPrototype = Uint8ClampedArray$1 && Uint8ClampedArray$1.prototype;
+       var TypedArray$1 = Int8Array$4 && getPrototypeOf$1(Int8Array$4);
+       var TypedArrayPrototype$2 = Int8ArrayPrototype$1 && getPrototypeOf$1(Int8ArrayPrototype$1);
+       var ObjectPrototype$1 = Object.prototype;
+       var TypeError$e = global$O.TypeError;
+
+       var TO_STRING_TAG = wellKnownSymbol$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 TYPED_ARRAY_TAG_REQIRED = false;
-       var NAME;
+       var NATIVE_ARRAY_BUFFER_VIEWS$3 = NATIVE_ARRAY_BUFFER && !!setPrototypeOf$4 && classof$7(global$O.opera) !== 'Opera';
+       var TYPED_ARRAY_TAG_REQUIRED = false;
+       var NAME$1, Constructor, Prototype;
 
        var TypedArrayConstructorsList = {
          Int8Array: 1,
        };
 
        var isView = function isView(it) {
-         if (!isObject(it)) return false;
-         var klass = classof(it);
+         if (!isObject$k(it)) return false;
+         var klass = classof$7(it);
          return klass === 'DataView'
-           || has(TypedArrayConstructorsList, klass)
-           || has(BigIntArrayConstructorsList, klass);
+           || hasOwn$9(TypedArrayConstructorsList, klass)
+           || hasOwn$9(BigIntArrayConstructorsList, klass);
        };
 
-       var isTypedArray = function (it) {
-         if (!isObject(it)) return false;
-         var klass = classof(it);
-         return has(TypedArrayConstructorsList, klass)
-           || has(BigIntArrayConstructorsList, klass);
+       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$1(it)) return it;
+         throw TypeError$e('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$1, C))) return C;
+         throw TypeError$e(tryToString$2(C) + ' is not a typed array constructor');
        };
 
-       var exportTypedArrayMethod = function (KEY, property, forced) {
-         if (!descriptors) return;
+       var exportTypedArrayMethod$n = function (KEY, property, forced, options) {
+         if (!DESCRIPTORS$e) return;
          if (forced) for (var ARRAY in TypedArrayConstructorsList) {
-           var TypedArrayConstructor = global_1[ARRAY];
-           if (TypedArrayConstructor && has(TypedArrayConstructor.prototype, KEY)) {
+           var TypedArrayConstructor = global$O[ARRAY];
+           if (TypedArrayConstructor && hasOwn$9(TypedArrayConstructor.prototype, KEY)) try {
              delete TypedArrayConstructor.prototype[KEY];
+           } catch (error) {
+             // old WebKit bug - some methods are non-configurable
+             try {
+               TypedArrayConstructor.prototype[KEY] = property;
+             } catch (error2) { /* empty */ }
            }
          }
-         if (!TypedArrayPrototype[KEY] || forced) {
-           redefine(TypedArrayPrototype, KEY, forced ? property
-             : NATIVE_ARRAY_BUFFER_VIEWS && Int8ArrayPrototype[KEY] || property);
+         if (!TypedArrayPrototype$2[KEY] || forced) {
+           redefine$9(TypedArrayPrototype$2, KEY, forced ? property
+             : NATIVE_ARRAY_BUFFER_VIEWS$3 && Int8ArrayPrototype$1[KEY] || property, options);
          }
        };
 
-       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$4) {
            if (forced) for (ARRAY in TypedArrayConstructorsList) {
-             TypedArrayConstructor = global_1[ARRAY];
-             if (TypedArrayConstructor && has(TypedArrayConstructor, KEY)) {
+             TypedArrayConstructor = global$O[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$1[KEY] || property);
              } catch (error) { /* empty */ }
            } else return;
          }
          for (ARRAY in TypedArrayConstructorsList) {
-           TypedArrayConstructor = global_1[ARRAY];
+           TypedArrayConstructor = global$O[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$1 in TypedArrayConstructorsList) {
+         Constructor = global$O[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$1 in BigIntArrayConstructorsList) {
+         Constructor = global$O[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) {
+       if (!NATIVE_ARRAY_BUFFER_VIEWS$3 || !isCallable$9(TypedArray$1) || TypedArray$1 === Function.prototype) {
          // eslint-disable-next-line no-shadow -- safe
-         TypedArray = function TypedArray() {
-           throw TypeError('Incorrect invocation');
+         TypedArray$1 = function TypedArray() {
+           throw TypeError$e('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$1 in TypedArrayConstructorsList) {
+           if (global$O[NAME$1]) setPrototypeOf$4(global$O[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$2 || TypedArrayPrototype$2 === ObjectPrototype$1) {
+         TypedArrayPrototype$2 = TypedArray$1.prototype;
+         if (NATIVE_ARRAY_BUFFER_VIEWS$3) for (NAME$1 in TypedArrayConstructorsList) {
+           if (global$O[NAME$1]) setPrototypeOf$4(global$O[NAME$1].prototype, TypedArrayPrototype$2);
          }
        }
 
        // 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$2) {
+         setPrototypeOf$4(Uint8ClampedArrayPrototype, TypedArrayPrototype$2);
        }
 
-       if (descriptors && !has(TypedArrayPrototype, TO_STRING_TAG$4)) {
-         TYPED_ARRAY_TAG_REQIRED = true;
-         defineProperty$4(TypedArrayPrototype, TO_STRING_TAG$4, { get: function () {
-           return isObject(this) ? this[TYPED_ARRAY_TAG] : undefined;
+       if (DESCRIPTORS$e && !hasOwn$9(TypedArrayPrototype$2, TO_STRING_TAG)) {
+         TYPED_ARRAY_TAG_REQUIRED = true;
+         defineProperty$7(TypedArrayPrototype$2, TO_STRING_TAG, { get: function () {
+           return isObject$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$1 in TypedArrayConstructorsList) if (global$O[NAME$1]) {
+           createNonEnumerableProperty$4(global$O[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_REQUIRED && 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$2
        };
 
-       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.es/ecma262/#sec-arraybuffer.isview
-       _export({ target: 'ArrayBuffer', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS$1 }, {
-         isView: arrayBufferViewCore.isView
+       $$17({ target: 'ArrayBuffer', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS$2 }, {
+         isView: ArrayBufferViewCore$o.isView
        });
 
-       var SPECIES$2 = wellKnownSymbol('species');
+       var getBuiltIn$4 = getBuiltIn$b;
+       var definePropertyModule$1 = objectDefineProperty;
+       var wellKnownSymbol$f = wellKnownSymbol$t;
+       var DESCRIPTORS$d = descriptors;
+
+       var SPECIES$4 = wellKnownSymbol$f('species');
 
-       var setSpecies = function (CONSTRUCTOR_NAME) {
-         var Constructor = getBuiltIn(CONSTRUCTOR_NAME);
-         var defineProperty = objectDefineProperty.f;
+       var setSpecies$5 = function (CONSTRUCTOR_NAME) {
+         var Constructor = getBuiltIn$4(CONSTRUCTOR_NAME);
+         var defineProperty = definePropertyModule$1.f;
 
-         if (descriptors && Constructor && !Constructor[SPECIES$2]) {
-           defineProperty(Constructor, SPECIES$2, {
+         if (DESCRIPTORS$d && Constructor && !Constructor[SPECIES$4]) {
+           defineProperty(Constructor, SPECIES$4, {
              configurable: true,
              get: function () { return this; }
            });
          }
        };
 
-       var ARRAY_BUFFER$1 = 'ArrayBuffer';
-       var ArrayBuffer$2 = arrayBuffer[ARRAY_BUFFER$1];
-       var NativeArrayBuffer$1 = global_1[ARRAY_BUFFER$1];
+       var $$16 = _export;
+       var global$N = global$1o;
+       var arrayBufferModule = arrayBuffer;
+       var setSpecies$4 = setSpecies$5;
+
+       var ARRAY_BUFFER = 'ArrayBuffer';
+       var ArrayBuffer$3 = arrayBufferModule[ARRAY_BUFFER];
+       var NativeArrayBuffer = global$N[ARRAY_BUFFER];
 
        // `ArrayBuffer` constructor
        // https://tc39.es/ecma262/#sec-arraybuffer-constructor
-       _export({ global: true, forced: NativeArrayBuffer$1 !== ArrayBuffer$2 }, {
-         ArrayBuffer: ArrayBuffer$2
+       $$16({ global: true, forced: NativeArrayBuffer !== ArrayBuffer$3 }, {
+         ArrayBuffer: ArrayBuffer$3
        });
 
-       setSpecies(ARRAY_BUFFER$1);
+       setSpecies$4(ARRAY_BUFFER);
+
+       var fails$H = fails$V;
 
-       var arrayMethodIsStrict = function (METHOD_NAME, argument) {
+       var arrayMethodIsStrict$9 = function (METHOD_NAME, argument) {
          var method = [][METHOD_NAME];
-         return !!method && fails(function () {
+         return !!method && fails$H(function () {
            // eslint-disable-next-line no-useless-call,no-throw-literal -- required for testing
            method.call(null, argument || function () { throw 1; }, 1);
          });
        };
 
-       var $indexOf = arrayIncludes.indexOf;
-
+       /* 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 nativeIndexOf = [].indexOf;
+       var un$IndexOf = uncurryThis$C([].indexOf);
 
-       var NEGATIVE_ZERO = !!nativeIndexOf && 1 / [1].indexOf(1, -0) < 0;
-       var STRICT_METHOD = arrayMethodIsStrict('indexOf');
+       var NEGATIVE_ZERO$1 = !!un$IndexOf && 1 / un$IndexOf([1], 1, -0) < 0;
+       var STRICT_METHOD$8 = arrayMethodIsStrict$8('indexOf');
 
        // `Array.prototype.indexOf` method
        // https://tc39.es/ecma262/#sec-array.prototype.indexof
-       _export({ target: 'Array', proto: true, forced: NEGATIVE_ZERO || !STRICT_METHOD }, {
+       $$15({ target: 'Array', proto: true, forced: NEGATIVE_ZERO$1 || !STRICT_METHOD$8 }, {
          indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {
-           return NEGATIVE_ZERO
+           var fromIndex = arguments.length > 1 ? arguments[1] : undefined;
+           return NEGATIVE_ZERO$1
              // convert -0 to +0
-             ? nativeIndexOf.apply(this, arguments) || 0
-             : $indexOf(this, searchElement, arguments.length > 1 ? arguments[1] : undefined);
+             ? un$IndexOf(this, searchElement, fromIndex) || 0
+             : $IndexOf(this, searchElement, fromIndex);
          }
        });
 
-       var SPECIES$3 = wellKnownSymbol('species');
+       var anObject$e = anObject$n;
+
+       // `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 fails$G = fails$V;
+       var global$M = global$1o;
+
+       // babel-minify and Closure Compiler transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError
+       var $RegExp$2 = global$M.RegExp;
+
+       var UNSUPPORTED_Y$3 = fails$G(function () {
+         var re = $RegExp$2('a', 'y');
+         re.lastIndex = 2;
+         return re.exec('abcd') != null;
+       });
+
+       // UC Browser bug
+       // https://github.com/zloirock/core-js/issues/1008
+       var MISSED_STICKY$1 = UNSUPPORTED_Y$3 || fails$G(function () {
+         return !$RegExp$2('a', 'y').sticky;
+       });
+
+       var BROKEN_CARET = UNSUPPORTED_Y$3 || fails$G(function () {
+         // https://bugzilla.mozilla.org/show_bug.cgi?id=773687
+         var re = $RegExp$2('^r', 'gy');
+         re.lastIndex = 2;
+         return re.exec('str') != null;
+       });
+
+       var regexpStickyHelpers = {
+         BROKEN_CARET: BROKEN_CARET,
+         MISSED_STICKY: MISSED_STICKY$1,
+         UNSUPPORTED_Y: UNSUPPORTED_Y$3
+       };
+
+       var fails$F = fails$V;
+       var global$L = global$1o;
+
+       // babel-minify and Closure Compiler transpiles RegExp('.', 's') -> /./s and it causes SyntaxError
+       var $RegExp$1 = global$L.RegExp;
+
+       var regexpUnsupportedDotAll = fails$F(function () {
+         var re = $RegExp$1('.', 's');
+         return !(re.dotAll && re.exec('\n') && re.flags === 's');
+       });
+
+       var fails$E = fails$V;
+       var global$K = global$1o;
+
+       // babel-minify and Closure Compiler transpiles RegExp('(?<a>b)', 'g') -> /(?<a>b)/g and it causes SyntaxError
+       var $RegExp = global$K.RegExp;
+
+       var regexpUnsupportedNcg = fails$E(function () {
+         var re = $RegExp('(?<a>b)', 'g');
+         return re.exec('b').groups.a !== 'b' ||
+           'b'.replace(re, '$<a>c') !== 'bc';
+       });
+
+       /* 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;
+
+       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.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) {
+         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;
+           }
+
+           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 arrayMethodHasSpeciesSupport = function (METHOD_NAME) {
+       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$5
+       });
+
+       var fails$D = fails$V;
+       var wellKnownSymbol$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 engineV8Version >= 51 || !fails(function () {
+         return V8_VERSION$2 >= 51 || !fails$D(function () {
            var array = [];
            var constructor = array.constructor = {};
            constructor[SPECIES$3] = function () {
          });
        };
 
-       var $map = arrayIteration.map;
-
+       var $$13 = _export;
+       var $map$1 = arrayIteration.map;
+       var arrayMethodHasSpeciesSupport$4 = arrayMethodHasSpeciesSupport$5;
 
-       var HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('map');
+       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
-       _export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT }, {
+       $$13({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$3 }, {
          map: function map(callbackfn /* , thisArg */) {
-           return $map(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+           return $map$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
          }
        });
 
        var $forEach$1 = arrayIteration.forEach;
+       var arrayMethodIsStrict$7 = arrayMethodIsStrict$9;
 
-
-       var STRICT_METHOD$1 = arrayMethodIsStrict('forEach');
+       var STRICT_METHOD$7 = arrayMethodIsStrict$7('forEach');
 
        // `Array.prototype.forEach` method implementation
        // https://tc39.es/ecma262/#sec-array.prototype.foreach
-       var arrayForEach = !STRICT_METHOD$1 ? function forEach(callbackfn /* , thisArg */) {
+       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 $$12 = _export;
+       var forEach$3 = arrayForEach;
+
        // `Array.prototype.forEach` method
        // https://tc39.es/ecma262/#sec-array.prototype.foreach
-       _export({ target: 'Array', proto: true, forced: [].forEach != arrayForEach }, {
-         forEach: arrayForEach
+       // eslint-disable-next-line es/no-array-prototype-foreach -- safe
+       $$12({ target: 'Array', proto: true, forced: [].forEach != forEach$3 }, {
+         forEach: forEach$3
        });
 
-       for (var COLLECTION_NAME$1 in domIterables) {
-         var Collection$1 = global_1[COLLECTION_NAME$1];
-         var CollectionPrototype$1 = Collection$1 && Collection$1.prototype;
+       var global$J = global$1o;
+       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$1 && CollectionPrototype$1.forEach !== arrayForEach) try {
-           createNonEnumerableProperty(CollectionPrototype$1, 'forEach', arrayForEach);
+         if (CollectionPrototype && CollectionPrototype.forEach !== forEach$2) try {
+           createNonEnumerableProperty$3(CollectionPrototype, 'forEach', forEach$2);
          } catch (error) {
-           CollectionPrototype$1.forEach = arrayForEach;
+           CollectionPrototype.forEach = forEach$2;
+         }
+       };
+
+       for (var COLLECTION_NAME in DOMIterables) {
+         if (DOMIterables[COLLECTION_NAME]) {
+           handlePrototype(global$J[COLLECTION_NAME] && global$J[COLLECTION_NAME].prototype);
          }
        }
 
+       handlePrototype(DOMTokenListPrototype);
+
+       var $$11 = _export;
+       var isArray$5 = isArray$8;
+
        // `Array.isArray` method
        // https://tc39.es/ecma262/#sec-array.isarray
-       _export({ target: 'Array', stat: true }, {
-         isArray: isArray
+       $$11({ target: 'Array', stat: true }, {
+         isArray: isArray$5
        });
 
-       var nativeGetOwnPropertyNames$2 = objectGetOwnPropertyNamesExternal.f;
+       var $$10 = _export;
+       var fails$C = fails$V;
+       var getOwnPropertyNames$3 = objectGetOwnPropertyNamesExternal.f;
 
-       var FAILS_ON_PRIMITIVES = fails(function () { return !Object.getOwnPropertyNames(1); });
+       // eslint-disable-next-line es/no-object-getownpropertynames -- required for testing
+       var FAILS_ON_PRIMITIVES$5 = fails$C(function () { return !Object.getOwnPropertyNames(1); });
 
        // `Object.getOwnPropertyNames` method
        // https://tc39.es/ecma262/#sec-object.getownpropertynames
-       _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, {
-         getOwnPropertyNames: nativeGetOwnPropertyNames$2
+       $$10({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$5 }, {
+         getOwnPropertyNames: getOwnPropertyNames$3
        });
 
-       var nativePromiseConstructor = global_1.Promise;
+       var global$I = global$1o;
 
-       var ITERATOR$3 = wellKnownSymbol('iterator');
-       var ArrayPrototype$1 = Array.prototype;
+       var nativePromiseConstructor = global$I.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 = function (it) {
-         return it !== undefined && (iterators.Array === it || ArrayPrototype$1[ITERATOR$3] === it);
+       var isArrayIteratorMethod$3 = function (it) {
+         return it !== undefined && (Iterators$1.Array === it || ArrayPrototype[ITERATOR$7] === it);
        };
 
-       var ITERATOR$4 = wellKnownSymbol('iterator');
+       var classof$6 = classof$d;
+       var getMethod$5 = getMethod$7;
+       var Iterators = iterators;
+       var wellKnownSymbol$c = wellKnownSymbol$t;
 
-       var getIteratorMethod = function (it) {
-         if (it != undefined) return it[ITERATOR$4]
-           || it['@@iterator']
-           || iterators[classof(it)];
+       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 iteratorClose = function (iterator) {
-         var returnMethod = iterator['return'];
-         if (returnMethod !== undefined) {
-           return anObject(returnMethod.call(iterator)).value;
+       var global$H = global$1o;
+       var call$h = functionCall;
+       var aCallable$7 = aCallable$a;
+       var anObject$d = anObject$n;
+       var tryToString$1 = tryToString$5;
+       var getIteratorMethod$4 = getIteratorMethod$5;
+
+       var TypeError$d = global$H.TypeError;
+
+       var getIterator$4 = function (argument, usingIterator) {
+         var iteratorMethod = arguments.length < 2 ? getIteratorMethod$4(argument) : usingIterator;
+         if (aCallable$7(iteratorMethod)) return anObject$d(call$h(iteratorMethod, argument));
+         throw TypeError$d(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$G = global$1o;
+       var bind$d = functionBindContext;
+       var call$f = functionCall;
+       var anObject$b = anObject$n;
+       var tryToString = tryToString$5;
+       var isArrayIteratorMethod$2 = isArrayIteratorMethod$3;
+       var lengthOfArrayLike$d = lengthOfArrayLike$i;
+       var isPrototypeOf$4 = objectIsPrototypeOf;
+       var getIterator$3 = getIterator$4;
+       var getIteratorMethod$3 = getIteratorMethod$5;
+       var iteratorClose$1 = iteratorClose$2;
+
+       var TypeError$c = global$G.TypeError;
+
        var Result = function (stopped, result) {
          this.stopped = stopped;
          this.result = result;
        };
 
-       var iterate = function (iterable, unboundFunction, options) {
+       var ResultPrototype = Result.prototype;
+
+       var iterate$3 = function (iterable, unboundFunction, options) {
          var that = options && options.that;
          var AS_ENTRIES = !!(options && options.AS_ENTRIES);
          var IS_ITERATOR = !!(options && options.IS_ITERATOR);
          var INTERRUPTED = !!(options && options.INTERRUPTED);
-         var fn = functionBindContext(unboundFunction, that, 1 + AS_ENTRIES + INTERRUPTED);
+         var fn = bind$d(unboundFunction, that);
          var iterator, iterFn, index, length, result, next, step;
 
          var stop = function (condition) {
-           if (iterator) iteratorClose(iterator);
+           if (iterator) iteratorClose$1(iterator, 'normal', condition);
            return new Result(true, condition);
          };
 
          var callFn = function (value) {
            if (AS_ENTRIES) {
-             anObject(value);
+             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(iterable);
-           if (typeof iterFn != 'function') throw TypeError('Target is not iterable');
+           iterFn = getIteratorMethod$3(iterable);
+           if (!iterFn) throw TypeError$c(tryToString(iterable) + ' is not iterable');
            // optimisation for array iterators
-           if (isArrayIteratorMethod(iterFn)) {
-             for (index = 0, length = toLength(iterable.length); length > index; index++) {
+           if (isArrayIteratorMethod$2(iterFn)) {
+             for (index = 0, length = lengthOfArrayLike$d(iterable); length > index; index++) {
                result = callFn(iterable[index]);
-               if (result && result instanceof Result) return result;
+               if (result && isPrototypeOf$4(ResultPrototype, result)) return result;
              } return new Result(false);
            }
-           iterator = iterFn.call(iterable);
+           iterator = getIterator$3(iterable, iterFn);
          }
 
          next = iterator.next;
-         while (!(step = next.call(iterator)).done) {
+         while (!(step = call$f(next, iterator)).done) {
            try {
              result = callFn(step.value);
            } catch (error) {
-             iteratorClose(iterator);
-             throw error;
+             iteratorClose$1(iterator, 'throw', error);
            }
-           if (typeof result == 'object' && result && result instanceof Result) return result;
+           if (typeof result == 'object' && result && isPrototypeOf$4(ResultPrototype, result)) return result;
          } return new Result(false);
        };
 
-       var ITERATOR$5 = wellKnownSymbol('iterator');
+       var wellKnownSymbol$b = wellKnownSymbol$t;
+
+       var ITERATOR$5 = wellKnownSymbol$b('iterator');
        var SAFE_CLOSING = false;
 
        try {
          iteratorWithReturn[ITERATOR$5] = function () {
            return this;
          };
-         // eslint-disable-next-line no-throw-literal -- required for testing
+         // 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 = function (exec, SKIP_CLOSING) {
+       var checkCorrectnessOfIteration$4 = function (exec, SKIP_CLOSING) {
          if (!SKIP_CLOSING && !SAFE_CLOSING) return false;
          var ITERATION_SUPPORT = false;
          try {
          return ITERATION_SUPPORT;
        };
 
-       var engineIsIos = /(iphone|ipod|ipad).*applewebkit/i.test(engineUserAgent);
+       var global$F = global$1o;
 
-       var location$1 = global_1.location;
-       var set$2 = global_1.setImmediate;
-       var clear = global_1.clearImmediate;
-       var process$2 = global_1.process;
-       var MessageChannel = global_1.MessageChannel;
-       var Dispatch = global_1.Dispatch;
+       var TypeError$b = global$F.TypeError;
+
+       var validateArgumentsLength$4 = function (passed, required) {
+         if (passed < required) throw TypeError$b('Not enough arguments');
+         return passed;
+       };
+
+       var userAgent$6 = engineUserAgent;
+
+       var engineIsIos = /(?:ipad|iphone|ipod).*applewebkit/i.test(userAgent$6);
+
+       var classof$5 = classofRaw$1;
+       var global$E = global$1o;
+
+       var engineIsNode = classof$5(global$E.process) == 'process';
+
+       var global$D = global$1o;
+       var apply$7 = functionApply;
+       var bind$c = functionBindContext;
+       var isCallable$8 = isCallable$r;
+       var hasOwn$8 = hasOwnProperty_1;
+       var fails$B = fails$V;
+       var html = html$2;
+       var arraySlice$8 = arraySlice$b;
+       var createElement = documentCreateElement$2;
+       var validateArgumentsLength$3 = validateArgumentsLength$4;
+       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 queue$1 = {};
        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 -- safe
-         if (queue.hasOwnProperty(id)) {
-           var fn = queue[id];
-           delete queue[id];
+         if (hasOwn$8(queue$1, id)) {
+           var fn = queue$1[id];
+           delete queue$1[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++]);
-           queue[++counter] = function () {
-             // eslint-disable-next-line no-new-func -- spec requirement
-             (typeof fn == 'function' ? fn : Function(fn)).apply(undefined, args);
+         set$2 = function setImmediate(handler) {
+           validateArgumentsLength$3(arguments.length, 1);
+           var fn = isCallable$8(handler) ? handler : Function$3(handler);
+           var args = arraySlice$8(arguments, 1);
+           queue$1[++counter] = function () {
+             apply$7(fn, undefined, args);
            };
            defer(counter);
            return counter;
          };
          clear = function clearImmediate(id) {
-           delete queue[id];
+           delete queue$1[id];
          };
          // Node.js 0.8-
-         if (engineIsNode) {
+         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 &&
+           global$D.addEventListener &&
+           isCallable$8(global$D.postMessage) &&
+           !global$D.importScripts &&
            location$1 && location$1.protocol !== 'file:' &&
-           !fails(post)
+           !fails$B(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 engineIsWebosWebkit = /web0s(?!.*chrome)/i.test(engineUserAgent);
-
-       var getOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;
-       var macrotask = task.set;
+       var userAgent$5 = engineUserAgent;
+       var global$C = global$1o;
 
+       var engineIsIosPebble = /ipad|iphone|ipod/i.test(userAgent$5) && global$C.Pebble !== undefined;
 
+       var userAgent$4 = engineUserAgent;
 
+       var engineIsWebosWebkit = /web0s(?!.*chrome)/i.test(userAgent$4);
 
-       var MutationObserver = global_1.MutationObserver || global_1.WebKitMutationObserver;
-       var document$2 = global_1.document;
-       var process$3 = global_1.process;
-       var Promise$1 = global_1.Promise;
+       var global$B = global$1o;
+       var bind$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 (engineIsNode && (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;
              }
 
          // browsers with MutationObserver, except iOS - https://github.com/zloirock/core-js/issues/339
          // also except WebOS Webkit https://github.com/zloirock/core-js/issues/898
-         if (!engineIsIos && !engineIsNode && !engineIsWebosWebkit && MutationObserver && document$2) {
+         if (!IS_IOS && !IS_NODE$3 && !IS_WEBOS_WEBKIT && MutationObserver && document$2) {
            toggle = true;
            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 (engineIsNode) {
-           notify = function () {
-             process$3.nextTick(flush);
+         } 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$1o;
+
+       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 Queue$1 = function () {
+         this.head = null;
+         this.tail = null;
+       };
 
+       Queue$1.prototype = {
+         add: function (item) {
+           var entry = { item: item, next: null };
+           if (this.head) this.tail.next = entry;
+           else this.head = entry;
+           this.tail = entry;
+         },
+         get: function () {
+           var entry = this.head;
+           if (entry) {
+             this.head = entry.next;
+             if (this.tail === entry) this.tail = null;
+             return entry.item;
+           }
+         }
+       };
 
-       var SPECIES$4 = wellKnownSymbol('species');
+       var queue = Queue$1;
+
+       var engineIsBrowser = typeof window == 'object';
+
+       var $$$ = _export;
+       var global$z = global$1o;
+       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 Queue = queue;
+       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$4 = internalState.get;
-       var setInternalState$4 = internalState.set;
-       var getInternalPromiseState = internalState.getterFor(PROMISE);
-       var PromiseConstructor = nativePromiseConstructor;
-       var TypeError$1 = global_1.TypeError;
-       var document$3 = global_1.document;
-       var process$4 = global_1.process;
-       var $fetch = getBuiltIn('fetch');
-       var newPromiseCapability$1 = newPromiseCapability.f;
-       var newGenericPromiseCapability = newPromiseCapability$1;
-       var DISPATCH_EVENT = !!(document$3 && document$3.createEvent && global_1.dispatchEvent);
-       var NATIVE_REJECTION_EVENT = typeof PromiseRejectionEvent == 'function';
+
+       var getInternalState$1 = InternalStateModule$4.getterFor(PROMISE);
+       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 (!engineIsNode && !NATIVE_REJECTION_EVENT) return true;
-         }
+       var FORCED$g = 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$4] = 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$1 = FORCED$g || !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$1 = function (state, isReject) {
+       var callReaction = function (reaction, state) {
+         var value = state.value;
+         var ok = state.state == FULFILLED;
+         var handler = ok ? reaction.ok : reaction.fail;
+         var resolve = reaction.resolve;
+         var reject = reaction.reject;
+         var domain = reaction.domain;
+         var result, then, exited;
+         try {
+           if (handler) {
+             if (!ok) {
+               if (state.rejection === UNHANDLED) onHandleUnhandled(state);
+               state.rejection = HANDLED;
+             }
+             if (handler === true) result = value;
+             else {
+               if (domain) domain.enter();
+               result = handler(value); // can throw
+               if (domain) {
+                 domain.exit();
+                 exited = true;
+               }
+             }
+             if (result === reaction.promise) {
+               reject(TypeError$a('Promise-chain cycle'));
+             } else if (then = isThenable(result)) {
+               call$e(then, result, resolve, reject);
+             } else resolve(result);
+           } else reject(value);
+         } catch (error) {
+           if (domain && !exited) domain.exit();
+           reject(error);
+         }
+       };
+
+       var notify = function (state, isReject) {
          if (state.notified) return;
          state.notified = true;
-         var chain = state.reactions;
          microtask(function () {
-           var value = state.value;
-           var ok = state.state == FULFILLED;
-           var index = 0;
-           // variable length - can't use forEach
-           while (chain.length > index) {
-             var reaction = chain[index++];
-             var handler = ok ? reaction.ok : reaction.fail;
-             var resolve = reaction.resolve;
-             var reject = reaction.reject;
-             var domain = reaction.domain;
-             var result, then, exited;
-             try {
-               if (handler) {
-                 if (!ok) {
-                   if (state.rejection === UNHANDLED) onHandleUnhandled(state);
-                   state.rejection = HANDLED;
-                 }
-                 if (handler === true) result = value;
-                 else {
-                   if (domain) domain.enter();
-                   result = handler(value); // can throw
-                   if (domain) {
-                     domain.exit();
-                     exited = true;
-                   }
-                 }
-                 if (result === reaction.promise) {
-                   reject(TypeError$1('Promise-chain cycle'));
-                 } else if (then = isThenable(result)) {
-                   then.call(result, resolve, reject);
-                 } else resolve(result);
-               } else reject(value);
-             } catch (error) {
-               if (domain && !exited) domain.exit();
-               reject(error);
-             }
+           var reactions = state.reactions;
+           var reaction;
+           while (reaction = reactions.get()) {
+             callReaction(reaction, state);
            }
-           state.reactions = [];
            state.notified = false;
            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$3.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 (!NATIVE_REJECTION_EVENT && (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 (state) {
-         task$1.call(global_1, function () {
+         call$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 (engineIsNode) {
-                 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 = engineIsNode || isUnhandled(state) ? UNHANDLED : HANDLED;
+             state.rejection = IS_NODE$2 || isUnhandled(state) ? UNHANDLED : HANDLED;
              if (result.error) throw result.value;
            }
          });
        };
 
        var onHandleUnhandled = function (state) {
-         task$1.call(global_1, function () {
+         call$e(task, global$z, function () {
            var promise = state.facade;
-           if (engineIsNode) {
-             process$4.emit('rejectionHandled', promise);
-           } else dispatchEvent(REJECTION_HANDLED, promise, state.value);
+           if (IS_NODE$2) {
+             process$1.emit('rejectionHandled', promise);
+           } else dispatchEvent$1(REJECTION_HANDLED, promise, state.value);
          });
        };
 
-       var bind = function (fn, state, unwrap) {
+       var bind$a = function (fn, state, unwrap) {
          return function (value) {
            fn(state, value, unwrap);
          };
          if (unwrap) state = unwrap;
          state.value = value;
          state.state = REJECTED;
-         notify$1(state, true);
+         notify(state, true);
        };
 
        var internalResolve = function (state, value, unwrap) {
          state.done = true;
          if (unwrap) state = unwrap;
          try {
-           if (state.facade === 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, wrapper, state),
-                   bind(internalReject, wrapper, state)
+                 call$e(then, value,
+                   bind$a(internalResolve, wrapper, state),
+                   bind$a(internalReject, wrapper, state)
                  );
                } catch (error) {
                  internalReject(wrapper, error, state);
            } else {
              state.value = value;
              state.state = FULFILLED;
-             notify$1(state, false);
+             notify(state, false);
            }
          } catch (error) {
            internalReject({ done: false }, error, state);
        };
 
        // constructor polyfill
-       if (FORCED) {
+       if (FORCED$g) {
          // 25.4.3.1 Promise(executor)
          PromiseConstructor = function Promise(executor) {
-           anInstance(this, PromiseConstructor, PROMISE);
-           aFunction$1(executor);
-           Internal.call(this);
-           var state = getInternalState$4(this);
+           anInstance$5(this, PromisePrototype);
+           aCallable$5(executor);
+           call$e(Internal, this);
+           var state = getInternalState$1(this);
            try {
-             executor(bind(internalResolve, state), bind(internalReject, state));
+             executor(bind$a(internalResolve, state), bind$a(internalReject, state));
            } catch (error) {
              internalReject(state, error);
            }
          };
+         PromisePrototype = PromiseConstructor.prototype;
          // eslint-disable-next-line no-unused-vars -- required for `.length`
          Internal = function Promise(executor) {
            setInternalState$4(this, {
              done: false,
              notified: false,
              parent: false,
-             reactions: [],
+             reactions: new Queue(),
              rejection: false,
              state: PENDING,
              value: undefined
            });
          };
-         Internal.prototype = redefineAll(PromiseConstructor.prototype, {
+         Internal.prototype = redefineAll$2(PromisePrototype, {
            // `Promise.prototype.then` method
            // https://tc39.es/ecma262/#sec-promise.prototype.then
+           // eslint-disable-next-line unicorn/no-thenable -- safe
            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 = engineIsNode ? process$4.domain : undefined;
+             var reaction = newPromiseCapability(speciesConstructor$3(this, PromiseConstructor));
              state.parent = true;
-             state.reactions.push(reaction);
-             if (state.state != PENDING) notify$1(state, false);
+             reaction.ok = isCallable$7(onFulfilled) ? onFulfilled : true;
+             reaction.fail = isCallable$7(onRejected) && onRejected;
+             reaction.domain = IS_NODE$2 ? process$1.domain : undefined;
+             if (state.state == PENDING) state.reactions.add(reaction);
+             else microtask(function () {
+               callReaction(reaction, state);
+             });
              return reaction.promise;
            },
            // `Promise.prototype.catch` method
          });
          OwnPromiseCapability = function () {
            var promise = new Internal();
-           var state = getInternalState$4(promise);
+           var state = getInternalState$1(promise);
            this.promise = promise;
-           this.resolve = bind(internalResolve, state);
-           this.reject = bind(internalReject, state);
+           this.resolve = bind$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 -- required for `.length`
-             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$g }, {
          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$g }, {
          // `Promise.reject` method
          // 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$g }, {
          // `Promise.resolve` method
          // 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.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(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;
          // 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(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);
          }
        });
 
+       var typedArrayConstructor = {exports: {}};
+
        /* eslint-disable no-new -- required for testing */
 
+       var global$y = global$1o;
+       var fails$A = fails$V;
+       var checkCorrectnessOfIteration$2 = checkCorrectnessOfIteration$4;
+       var NATIVE_ARRAY_BUFFER_VIEWS$1 = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
+
+       var ArrayBuffer$2 = global$y.ArrayBuffer;
+       var Int8Array$3 = global$y.Int8Array;
+
+       var typedArrayConstructorsRequireWrappers = !NATIVE_ARRAY_BUFFER_VIEWS$1 || !fails$A(function () {
+         Int8Array$3(1);
+       }) || !fails$A(function () {
+         new Int8Array$3(-1);
+       }) || !checkCorrectnessOfIteration$2(function (iterable) {
+         new Int8Array$3();
+         new Int8Array$3(null);
+         new Int8Array$3(1.5);
+         new Int8Array$3(iterable);
+       }, true) || fails$A(function () {
+         // Safari (11+) bug - a reason why even Safari 13 should load a typed array polyfill
+         return new Int8Array$3(new ArrayBuffer$2(2), 1, undefined).length !== 1;
+       });
 
+       var isObject$h = isObject$s;
 
-       var NATIVE_ARRAY_BUFFER_VIEWS$2 = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
+       var floor$6 = Math.floor;
 
-       var ArrayBuffer$3 = global_1.ArrayBuffer;
-       var Int8Array$2 = global_1.Int8Array;
+       // `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 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$3(2), 1, undefined).length !== 1;
-       });
+       var global$x = global$1o;
+       var toIntegerOrInfinity$5 = toIntegerOrInfinity$b;
 
-       var toPositiveInteger = function (it) {
-         var result = toInteger(it);
-         if (result < 0) throw RangeError("The argument can't be less than 0");
+       var RangeError$9 = global$x.RangeError;
+
+       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 toOffset = function (it, BYTES) {
+       var global$w = global$1o;
+       var toPositiveInteger = toPositiveInteger$1;
+
+       var RangeError$8 = global$w.RangeError;
+
+       var toOffset$2 = function (it, BYTES) {
          var offset = toPositiveInteger(it);
-         if (offset % BYTES) throw RangeError('Wrong offset');
+         if (offset % BYTES) throw RangeError$8('Wrong offset');
          return offset;
        };
 
-       var aTypedArrayConstructor$1 = arrayBufferViewCore.aTypedArrayConstructor;
+       var bind$9 = functionBindContext;
+       var call$d = functionCall;
+       var aConstructor$1 = aConstructor$3;
+       var toObject$c = toObject$i;
+       var lengthOfArrayLike$c = lengthOfArrayLike$i;
+       var getIterator$2 = getIterator$4;
+       var getIteratorMethod$2 = getIteratorMethod$5;
+       var isArrayIteratorMethod$1 = isArrayIteratorMethod$3;
+       var aTypedArrayConstructor$2 = arrayBufferViewCore.aTypedArrayConstructor;
 
-       var typedArrayFrom = function from(source /* , mapfn, thisArg */) {
-         var O = toObject(source);
+       var typedArrayFrom$2 = function from(source /* , mapfn, thisArg */) {
+         var C = aConstructor$1(this);
+         var O = toObject$c(source);
          var argumentsLength = arguments.length;
          var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
          var mapping = mapfn !== undefined;
-         var iteratorMethod = getIteratorMethod(O);
+         var iteratorMethod = getIteratorMethod$2(O);
          var i, length, result, step, iterator, next;
-         if (iteratorMethod != undefined && !isArrayIteratorMethod(iteratorMethod)) {
-           iterator = iteratorMethod.call(O);
+         if (iteratorMethod && !isArrayIteratorMethod$1(iteratorMethod)) {
+           iterator = getIterator$2(O, iteratorMethod);
            next = iterator.next;
            O = [];
-           while (!(step = next.call(iterator)).done) {
+           while (!(step = call$d(next, iterator)).done) {
              O.push(step.value);
            }
          }
          if (mapping && argumentsLength > 2) {
-           mapfn = functionBindContext(mapfn, arguments[2], 2);
+           mapfn = bind$9(mapfn, arguments[2]);
          }
-         length = toLength(O.length);
-         result = new (aTypedArrayConstructor$1(this))(length);
+         length = lengthOfArrayLike$c(O);
+         result = new (aTypedArrayConstructor$2(C))(length);
          for (i = 0; length > i; i++) {
            result[i] = mapping ? mapfn(O[i], i) : O[i];
          }
          return result;
        };
 
+       var isCallable$6 = isCallable$r;
+       var isObject$g = isObject$s;
+       var setPrototypeOf$2 = objectSetPrototypeOf;
+
        // makes subclassing work correct for wrapped built-ins
-       var inheritIfRequired = function ($this, dummy, Wrapper) {
+       var inheritIfRequired$4 = function ($this, dummy, Wrapper) {
          var NewTarget, NewTargetPrototype;
          if (
            // it can work only with native `setPrototypeOf`
-           objectSetPrototypeOf &&
+           setPrototypeOf$2 &&
            // we haven't completely correct pre-ES6 way for getting `new.target`, so use this
-           typeof (NewTarget = dummy.constructor) == 'function' &&
+           isCallable$6(NewTarget = dummy.constructor) &&
            NewTarget !== Wrapper &&
-           isObject(NewTargetPrototype = NewTarget.prototype) &&
+           isObject$g(NewTargetPrototype = NewTarget.prototype) &&
            NewTargetPrototype !== Wrapper.prototype
-         ) objectSetPrototypeOf($this, NewTargetPrototype);
+         ) setPrototypeOf$2($this, NewTargetPrototype);
          return $this;
        };
 
-       var typedArrayConstructor = createCommonjsModule(function (module) {
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-       var getOwnPropertyNames = objectGetOwnPropertyNames.f;
-
-       var forEach = arrayIteration.forEach;
-
-
-
-
-
-
-       var getInternalState = internalState.get;
-       var setInternalState = internalState.set;
-       var nativeDefineProperty = objectDefineProperty.f;
-       var nativeGetOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+       var $$_ = _export;
+       var global$v = global$1o;
+       var call$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$1 = 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 = 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 = 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.f;
+       var nativeGetOwnPropertyDescriptor$1 = getOwnPropertyDescriptorModule$1.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 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$1 = ArrayBufferViewCore$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';
 
        var fromList = function (C, list) {
+         aTypedArrayConstructor$1(C);
          var index = 0;
          var length = list.length;
-         var result = new (aTypedArrayConstructor(C))(length);
+         var result = new C(length);
          while (length > index) result[index] = list[index++];
          return result;
        };
 
        var isArrayBuffer = function (it) {
          var klass;
-         return it instanceof ArrayBuffer || (klass = classof(it)) == 'ArrayBuffer' || klass == 'SharedArrayBuffer';
+         return isPrototypeOf$3(ArrayBufferPrototype, it) || (klass = classof$4(it)) == 'ArrayBuffer' || klass == 'SharedArrayBuffer';
        };
 
        var isTypedArrayIndex = function (target, key) {
          return isTypedArray(target)
-           && typeof key != 'symbol'
+           && !isSymbol$2(key)
            && key in target
-           && String(+key) == String(key);
+           && isIntegralNumber(+key)
+           && key >= 0;
        };
 
        var wrappedGetOwnPropertyDescriptor = function getOwnPropertyDescriptor(target, key) {
-         return isTypedArrayIndex(target, key = toPrimitive(key, true))
-           ? createPropertyDescriptor(2, target[key])
-           : nativeGetOwnPropertyDescriptor(target, key);
+         key = toPropertyKey(key);
+         return isTypedArrayIndex(target, key)
+           ? createPropertyDescriptor$1(2, target[key])
+           : nativeGetOwnPropertyDescriptor$1(target, key);
        };
 
        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')
+         key = toPropertyKey(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
-           && (!has(descriptor, 'writable') || descriptor.writable)
-           && (!has(descriptor, 'enumerable') || descriptor.enumerable)
+           && (!hasOwn$7(descriptor, 'writable') || descriptor.writable)
+           && (!hasOwn$7(descriptor, 'enumerable') || descriptor.enumerable)
          ) {
            target[key] = descriptor.value;
            return target;
          } return nativeDefineProperty(target, key, descriptor);
        };
 
-       if (descriptors) {
+       if (DESCRIPTORS$c) {
          if (!NATIVE_ARRAY_BUFFER_VIEWS) {
-           objectGetOwnPropertyDescriptor.f = wrappedGetOwnPropertyDescriptor;
-           objectDefineProperty.f = wrappedDefineProperty;
-           addGetter(TypedArrayPrototype, 'buffer');
-           addGetter(TypedArrayPrototype, 'byteOffset');
-           addGetter(TypedArrayPrototype, 'byteLength');
-           addGetter(TypedArrayPrototype, 'length');
+           getOwnPropertyDescriptorModule$1.f = wrappedGetOwnPropertyDescriptor;
+           definePropertyModule.f = wrappedDefineProperty;
+           addGetter(TypedArrayPrototype$1, 'buffer');
+           addGetter(TypedArrayPrototype$1, 'byteOffset');
+           addGetter(TypedArrayPrototype$1, 'byteLength');
+           addGetter(TypedArrayPrototype$1, 'length');
          }
 
-         _export({ target: 'Object', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {
+         $$_({ target: 'Object', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {
            getOwnPropertyDescriptor: wrappedGetOwnPropertyDescriptor,
            defineProperty: wrappedDefineProperty
          });
 
-         module.exports = function (TYPE, wrapper, CLAMPED) {
+         typedArrayConstructor.exports = function (TYPE, wrapper, CLAMPED) {
            var BYTES = TYPE.match(/\d+$/)[0] / 8;
            var CONSTRUCTOR_NAME = TYPE + (CLAMPED ? 'Clamped' : '') + 'Array';
            var GETTER = 'get' + TYPE;
            var SETTER = 'set' + TYPE;
-           var NativeTypedArrayConstructor = global_1[CONSTRUCTOR_NAME];
+           var NativeTypedArrayConstructor = global$v[CONSTRUCTOR_NAME];
            var TypedArrayConstructor = NativeTypedArrayConstructor;
            var TypedArrayConstructorPrototype = TypedArrayConstructor && TypedArrayConstructor.prototype;
            var exported = {};
 
            if (!NATIVE_ARRAY_BUFFER_VIEWS) {
              TypedArrayConstructor = wrapper(function (that, data, offset, $length) {
-               anInstance(that, TypedArrayConstructor, CONSTRUCTOR_NAME);
+               anInstance$4(that, TypedArrayConstructorPrototype);
                var index = 0;
                var byteOffset = 0;
                var buffer, byteLength, length;
-               if (!isObject(data)) {
+               if (!isObject$f(data)) {
                  length = toIndex(data);
                  byteLength = length * BYTES;
-                 buffer = new ArrayBuffer(byteLength);
+                 buffer = new ArrayBuffer$1(byteLength);
                } else if (isArrayBuffer(data)) {
                  buffer = data;
-                 byteOffset = toOffset(offset, BYTES);
+                 byteOffset = toOffset$1(offset, BYTES);
                  var $len = data.byteLength;
                  if ($length === undefined) {
-                   if ($len % BYTES) throw RangeError(WRONG_LENGTH);
+                   if ($len % BYTES) throw RangeError$7(WRONG_LENGTH);
                    byteLength = $len - byteOffset;
-                   if (byteLength < 0) throw RangeError(WRONG_LENGTH);
+                   if (byteLength < 0) throw RangeError$7(WRONG_LENGTH);
                  } else {
-                   byteLength = toLength($length) * BYTES;
-                   if (byteLength + byteOffset > $len) throw RangeError(WRONG_LENGTH);
+                   byteLength = toLength$7($length) * BYTES;
+                   if (byteLength + byteOffset > $len) throw RangeError$7(WRONG_LENGTH);
                  }
                  length = byteLength / BYTES;
                } else if (isTypedArray(data)) {
                  return fromList(TypedArrayConstructor, data);
                } else {
-                 return typedArrayFrom.call(TypedArrayConstructor, data);
+                 return call$c(typedArrayFrom$1, TypedArrayConstructor, data);
                }
-               setInternalState(that, {
+               setInternalState$3(that, {
                  buffer: buffer,
                  byteOffset: byteOffset,
                  byteLength: byteLength,
                  length: length,
-                 view: new DataView(buffer)
+                 view: new DataView$1(buffer)
                });
                while (index < length) addElement(that, index++);
              });
 
-             if (objectSetPrototypeOf) objectSetPrototypeOf(TypedArrayConstructor, TypedArray);
-             TypedArrayConstructorPrototype = TypedArrayConstructor.prototype = objectCreate(TypedArrayPrototype);
-           } else if (typedArrayConstructorsRequireWrappers) {
+             if (setPrototypeOf$1) setPrototypeOf$1(TypedArrayConstructor, TypedArray);
+             TypedArrayConstructorPrototype = TypedArrayConstructor.prototype = create$7(TypedArrayPrototype$1);
+           } else if (TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS$1) {
              TypedArrayConstructor = wrapper(function (dummy, data, typedArrayOffset, $length) {
-               anInstance(dummy, TypedArrayConstructor, CONSTRUCTOR_NAME);
-               return inheritIfRequired(function () {
-                 if (!isObject(data)) return new NativeTypedArrayConstructor(toIndex(data));
+               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(typedArrayOffset, BYTES), $length)
+                   ? new NativeTypedArrayConstructor(data, toOffset$1(typedArrayOffset, BYTES), $length)
                    : typedArrayOffset !== undefined
-                     ? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES))
+                     ? new NativeTypedArrayConstructor(data, toOffset$1(typedArrayOffset, BYTES))
                      : new NativeTypedArrayConstructor(data);
                  if (isTypedArray(data)) return fromList(TypedArrayConstructor, data);
-                 return typedArrayFrom.call(TypedArrayConstructor, data);
+                 return call$c(typedArrayFrom$1, TypedArrayConstructor, data);
                }(), dummy, TypedArrayConstructor);
              });
 
-             if (objectSetPrototypeOf) objectSetPrototypeOf(TypedArrayConstructor, TypedArray);
-             forEach(getOwnPropertyNames(NativeTypedArrayConstructor), function (key) {
+             if (setPrototypeOf$1) setPrototypeOf$1(TypedArrayConstructor, TypedArray);
+             forEach$1(getOwnPropertyNames$2(NativeTypedArrayConstructor), function (key) {
                if (!(key in TypedArrayConstructor)) {
-                 createNonEnumerableProperty(TypedArrayConstructor, key, NativeTypedArrayConstructor[key]);
+                 createNonEnumerableProperty$2(TypedArrayConstructor, key, NativeTypedArrayConstructor[key]);
                }
              });
              TypedArrayConstructor.prototype = TypedArrayConstructorPrototype;
            }
 
            if (TypedArrayConstructorPrototype.constructor !== TypedArrayConstructor) {
-             createNonEnumerableProperty(TypedArrayConstructorPrototype, 'constructor', TypedArrayConstructor);
+             createNonEnumerableProperty$2(TypedArrayConstructorPrototype, 'constructor', TypedArrayConstructor);
            }
 
+           createNonEnumerableProperty$2(TypedArrayConstructorPrototype, TYPED_ARRAY_CONSTRUCTOR$1, TypedArrayConstructor);
+
            if (TYPED_ARRAY_TAG) {
-             createNonEnumerableProperty(TypedArrayConstructorPrototype, TYPED_ARRAY_TAG, CONSTRUCTOR_NAME);
+             createNonEnumerableProperty$2(TypedArrayConstructorPrototype, TYPED_ARRAY_TAG, CONSTRUCTOR_NAME);
            }
 
            exported[CONSTRUCTOR_NAME] = TypedArrayConstructor;
 
-           _export({
+           $$_({
              global: true, forced: TypedArrayConstructor != NativeTypedArrayConstructor, sham: !NATIVE_ARRAY_BUFFER_VIEWS
            }, exported);
 
            if (!(BYTES_PER_ELEMENT in TypedArrayConstructor)) {
-             createNonEnumerableProperty(TypedArrayConstructor, BYTES_PER_ELEMENT, BYTES);
+             createNonEnumerableProperty$2(TypedArrayConstructor, BYTES_PER_ELEMENT, BYTES);
            }
 
            if (!(BYTES_PER_ELEMENT in TypedArrayConstructorPrototype)) {
-             createNonEnumerableProperty(TypedArrayConstructorPrototype, BYTES_PER_ELEMENT, BYTES);
+             createNonEnumerableProperty$2(TypedArrayConstructorPrototype, BYTES_PER_ELEMENT, BYTES);
            }
 
-           setSpecies(CONSTRUCTOR_NAME);
+           setSpecies$2(CONSTRUCTOR_NAME);
          };
-       } else module.exports = function () { /* empty */ };
-       });
+       } else typedArrayConstructor.exports = function () { /* empty */ };
+
+       var createTypedArrayConstructor$1 = typedArrayConstructor.exports;
 
        // `Uint8Array` constructor
        // https://tc39.es/ecma262/#sec-typedarray-objects
-       typedArrayConstructor('Uint8', function (init) {
+       createTypedArrayConstructor$1('Uint8', function (init) {
          return function Uint8Array(data, byteOffset, length) {
            return init(this, data, byteOffset, length);
          };
        });
 
-       var min$2 = Math.min;
+       var toObject$b = toObject$i;
+       var toAbsoluteIndex$4 = toAbsoluteIndex$9;
+       var lengthOfArrayLike$b = lengthOfArrayLike$i;
+
+       var min$7 = Math.min;
 
        // `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(this);
-         var len = toLength(O.length);
-         var to = toAbsoluteIndex(target, len);
-         var from = toAbsoluteIndex(start, len);
+         var O = toObject$b(this);
+         var len = lengthOfArrayLike$b(O);
+         var to = toAbsoluteIndex$4(target, len);
+         var from = toAbsoluteIndex$4(start, len);
          var end = arguments.length > 2 ? arguments[2] : undefined;
-         var count = min$2((end === undefined ? len : toAbsoluteIndex(end, len)) - from, len - to);
+         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;
          } return O;
        };
 
-       var aTypedArray$1 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$1 = arrayBufferViewCore.exportTypedArrayMethod;
+       var uncurryThis$A = functionUncurryThis;
+       var ArrayBufferViewCore$m = arrayBufferViewCore;
+       var $ArrayCopyWithin = arrayCopyWithin;
+
+       var u$ArrayCopyWithin = uncurryThis$A($ArrayCopyWithin);
+       var aTypedArray$l = ArrayBufferViewCore$m.aTypedArray;
+       var exportTypedArrayMethod$m = ArrayBufferViewCore$m.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.copyWithin` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.copywithin
-       exportTypedArrayMethod$1('copyWithin', function copyWithin(target, start /* , end */) {
-         return arrayCopyWithin.call(aTypedArray$1(this), target, start, arguments.length > 2 ? arguments[2] : undefined);
+       exportTypedArrayMethod$m('copyWithin', function copyWithin(target, start /* , end */) {
+         return u$ArrayCopyWithin(aTypedArray$l(this), target, start, arguments.length > 2 ? arguments[2] : undefined);
        });
 
-       var $every = arrayIteration.every;
+       var ArrayBufferViewCore$l = arrayBufferViewCore;
+       var $every$1 = arrayIteration.every;
 
-       var aTypedArray$2 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$2 = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$k = ArrayBufferViewCore$l.aTypedArray;
+       var exportTypedArrayMethod$l = ArrayBufferViewCore$l.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.every` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.every
-       exportTypedArrayMethod$2('every', function every(callbackfn /* , thisArg */) {
-         return $every(aTypedArray$2(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+       exportTypedArrayMethod$l('every', function every(callbackfn /* , thisArg */) {
+         return $every$1(aTypedArray$k(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
        });
 
-       var aTypedArray$3 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$3 = arrayBufferViewCore.exportTypedArrayMethod;
+       var ArrayBufferViewCore$k = arrayBufferViewCore;
+       var call$b = functionCall;
+       var $fill = arrayFill$1;
+
+       var aTypedArray$j = ArrayBufferViewCore$k.aTypedArray;
+       var exportTypedArrayMethod$k = ArrayBufferViewCore$k.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.fill` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.fill
-       // eslint-disable-next-line no-unused-vars -- required for `.length`
-       exportTypedArrayMethod$3('fill', function fill(value /* , start, end */) {
-         return arrayFill.apply(aTypedArray$3(this), arguments);
+       exportTypedArrayMethod$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
+         );
        });
 
-       var aTypedArrayConstructor$2 = arrayBufferViewCore.aTypedArrayConstructor;
-
+       var lengthOfArrayLike$a = lengthOfArrayLike$i;
 
-       var typedArrayFromSpeciesAndList = function (instance, list) {
-         var C = speciesConstructor(instance, instance.constructor);
+       var arrayFromConstructorAndList$1 = function (Constructor, list) {
          var index = 0;
-         var length = list.length;
-         var result = new (aTypedArrayConstructor$2(C))(length);
+         var length = lengthOfArrayLike$a(list);
+         var result = new Constructor(length);
          while (length > index) result[index] = list[index++];
          return result;
        };
 
-       var $filter = arrayIteration.filter;
+       var ArrayBufferViewCore$j = arrayBufferViewCore;
+       var speciesConstructor$2 = speciesConstructor$5;
+
+       var TYPED_ARRAY_CONSTRUCTOR = ArrayBufferViewCore$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]));
+       };
+
+       var arrayFromConstructorAndList = arrayFromConstructorAndList$1;
+       var typedArraySpeciesConstructor$3 = typedArraySpeciesConstructor$4;
+
+       var typedArrayFromSpeciesAndList = function (instance, list) {
+         return arrayFromConstructorAndList(typedArraySpeciesConstructor$3(instance), list);
+       };
 
+       var ArrayBufferViewCore$i = arrayBufferViewCore;
+       var $filter$1 = arrayIteration.filter;
+       var fromSpeciesAndList = typedArrayFromSpeciesAndList;
 
-       var aTypedArray$4 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$4 = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$i = ArrayBufferViewCore$i.aTypedArray;
+       var exportTypedArrayMethod$j = ArrayBufferViewCore$i.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.filter` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.filter
-       exportTypedArrayMethod$4('filter', function filter(callbackfn /* , thisArg */) {
-         var list = $filter(aTypedArray$4(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-         return typedArrayFromSpeciesAndList(this, list);
+       exportTypedArrayMethod$j('filter', function filter(callbackfn /* , thisArg */) {
+         var list = $filter$1(aTypedArray$i(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+         return fromSpeciesAndList(this, list);
        });
 
-       var $find = arrayIteration.find;
+       var ArrayBufferViewCore$h = arrayBufferViewCore;
+       var $find$1 = arrayIteration.find;
 
-       var aTypedArray$5 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$5 = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$h = ArrayBufferViewCore$h.aTypedArray;
+       var exportTypedArrayMethod$i = ArrayBufferViewCore$h.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.find` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.find
-       exportTypedArrayMethod$5('find', function find(predicate /* , thisArg */) {
-         return $find(aTypedArray$5(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
+       exportTypedArrayMethod$i('find', function find(predicate /* , thisArg */) {
+         return $find$1(aTypedArray$h(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
        });
 
-       var $findIndex = arrayIteration.findIndex;
+       var ArrayBufferViewCore$g = arrayBufferViewCore;
+       var $findIndex$1 = arrayIteration.findIndex;
 
-       var aTypedArray$6 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$6 = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$g = ArrayBufferViewCore$g.aTypedArray;
+       var exportTypedArrayMethod$h = ArrayBufferViewCore$g.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.findIndex` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.findindex
-       exportTypedArrayMethod$6('findIndex', function findIndex(predicate /* , thisArg */) {
-         return $findIndex(aTypedArray$6(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
+       exportTypedArrayMethod$h('findIndex', function findIndex(predicate /* , thisArg */) {
+         return $findIndex$1(aTypedArray$g(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
        });
 
-       var $forEach$2 = arrayIteration.forEach;
+       var ArrayBufferViewCore$f = arrayBufferViewCore;
+       var $forEach = arrayIteration.forEach;
 
-       var aTypedArray$7 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$7 = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$f = ArrayBufferViewCore$f.aTypedArray;
+       var exportTypedArrayMethod$g = ArrayBufferViewCore$f.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.forEach` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.foreach
-       exportTypedArrayMethod$7('forEach', function forEach(callbackfn /* , thisArg */) {
-         $forEach$2(aTypedArray$7(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+       exportTypedArrayMethod$g('forEach', function forEach(callbackfn /* , thisArg */) {
+         $forEach(aTypedArray$f(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
        });
 
-       var $includes = arrayIncludes.includes;
+       var ArrayBufferViewCore$e = arrayBufferViewCore;
+       var $includes$1 = arrayIncludes.includes;
 
-       var aTypedArray$8 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$8 = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$e = ArrayBufferViewCore$e.aTypedArray;
+       var exportTypedArrayMethod$f = ArrayBufferViewCore$e.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.includes` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.includes
-       exportTypedArrayMethod$8('includes', function includes(searchElement /* , fromIndex */) {
-         return $includes(aTypedArray$8(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
+       exportTypedArrayMethod$f('includes', function includes(searchElement /* , fromIndex */) {
+         return $includes$1(aTypedArray$e(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
        });
 
-       var $indexOf$1 = arrayIncludes.indexOf;
+       var ArrayBufferViewCore$d = arrayBufferViewCore;
+       var $indexOf = arrayIncludes.indexOf;
 
-       var aTypedArray$9 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$9 = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$d = ArrayBufferViewCore$d.aTypedArray;
+       var exportTypedArrayMethod$e = ArrayBufferViewCore$d.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.indexOf` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.indexof
-       exportTypedArrayMethod$9('indexOf', function indexOf(searchElement /* , fromIndex */) {
-         return $indexOf$1(aTypedArray$9(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
+       exportTypedArrayMethod$e('indexOf', function indexOf(searchElement /* , fromIndex */) {
+         return $indexOf(aTypedArray$d(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
        });
 
-       var ITERATOR$6 = 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$6];
+       var global$u = global$1o;
+       var fails$z = fails$V;
+       var uncurryThis$z = functionUncurryThis;
+       var ArrayBufferViewCore$c = arrayBufferViewCore;
+       var ArrayIterators = es_array_iterator;
+       var wellKnownSymbol$9 = wellKnownSymbol$t;
+
+       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 TypedArrayPrototype = Uint8Array$2 && Uint8Array$2.prototype;
+
+       var GENERIC = !fails$z(function () {
+         TypedArrayPrototype[ITERATOR$4].call([1]);
+       });
 
-       var CORRECT_ITER_NAME = !!nativeTypedArrayIterator
-         && (nativeTypedArrayIterator.name == 'values' || nativeTypedArrayIterator.name == undefined);
+       var ITERATOR_IS_VALUES = !!TypedArrayPrototype
+         && TypedArrayPrototype.values
+         && TypedArrayPrototype[ITERATOR$4] === TypedArrayPrototype.values
+         && TypedArrayPrototype.values.name === 'values';
 
        var typedArrayValues = function values() {
-         return arrayValues.call(aTypedArray$a(this));
+         return arrayValues(aTypedArray$c(this));
        };
 
        // `%TypedArray%.prototype.entries` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.entries
-       exportTypedArrayMethod$a('entries', function entries() {
-         return arrayEntries.call(aTypedArray$a(this));
-       });
+       exportTypedArrayMethod$d('entries', function entries() {
+         return arrayEntries(aTypedArray$c(this));
+       }, GENERIC);
        // `%TypedArray%.prototype.keys` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.keys
-       exportTypedArrayMethod$a('keys', function keys() {
-         return arrayKeys.call(aTypedArray$a(this));
-       });
+       exportTypedArrayMethod$d('keys', function keys() {
+         return arrayKeys(aTypedArray$c(this));
+       }, GENERIC);
        // `%TypedArray%.prototype.values` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.values
-       exportTypedArrayMethod$a('values', typedArrayValues, !CORRECT_ITER_NAME);
+       exportTypedArrayMethod$d('values', typedArrayValues, GENERIC || !ITERATOR_IS_VALUES, { name: 'values' });
        // `%TypedArray%.prototype[@@iterator]` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype-@@iterator
-       exportTypedArrayMethod$a(ITERATOR$6, typedArrayValues, !CORRECT_ITER_NAME);
+       exportTypedArrayMethod$d(ITERATOR$4, typedArrayValues, GENERIC || !ITERATOR_IS_VALUES, { name: 'values' });
 
-       var aTypedArray$b = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$b = arrayBufferViewCore.exportTypedArrayMethod;
-       var $join = [].join;
+       var ArrayBufferViewCore$b = arrayBufferViewCore;
+       var uncurryThis$y = functionUncurryThis;
+
+       var aTypedArray$b = ArrayBufferViewCore$b.aTypedArray;
+       var exportTypedArrayMethod$c = ArrayBufferViewCore$b.exportTypedArrayMethod;
+       var $join = uncurryThis$y([].join);
 
        // `%TypedArray%.prototype.join` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.join
-       // eslint-disable-next-line no-unused-vars -- required for `.length`
-       exportTypedArrayMethod$b('join', function join(separator) {
-         return $join.apply(aTypedArray$b(this), arguments);
+       exportTypedArrayMethod$c('join', function join(separator) {
+         return $join(aTypedArray$b(this), separator);
        });
 
-       var min$3 = Math.min;
-       var nativeLastIndexOf = [].lastIndexOf;
-       var NEGATIVE_ZERO$1 = !!nativeLastIndexOf && 1 / [1].lastIndexOf(1, -0) < 0;
-       var STRICT_METHOD$2 = arrayMethodIsStrict('lastIndexOf');
-       var FORCED$1 = NEGATIVE_ZERO$1 || !STRICT_METHOD$2;
+       /* eslint-disable es/no-array-prototype-lastindexof -- safe */
+       var apply$6 = functionApply;
+       var toIndexedObject$5 = toIndexedObject$d;
+       var toIntegerOrInfinity$4 = toIntegerOrInfinity$b;
+       var lengthOfArrayLike$9 = lengthOfArrayLike$i;
+       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$6('lastIndexOf');
+       var FORCED$f = NEGATIVE_ZERO || !STRICT_METHOD$6;
 
        // `Array.prototype.lastIndexOf` method implementation
        // https://tc39.es/ecma262/#sec-array.prototype.lastindexof
-       var arrayLastIndexOf = FORCED$1 ? function lastIndexOf(searchElement /* , fromIndex = @[*-1] */) {
+       var arrayLastIndexOf = FORCED$f ? 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);
+         if (NEGATIVE_ZERO) return apply$6($lastIndexOf$1, this, arguments) || 0;
+         var O = toIndexedObject$5(this);
+         var length = lengthOfArrayLike$9(O);
          var index = length - 1;
-         if (arguments.length > 1) index = min$3(index, toInteger(arguments[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;
-       } : nativeLastIndexOf;
+       } : $lastIndexOf$1;
 
-       var aTypedArray$c = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$c = arrayBufferViewCore.exportTypedArrayMethod;
+       var ArrayBufferViewCore$a = arrayBufferViewCore;
+       var apply$5 = functionApply;
+       var $lastIndexOf = arrayLastIndexOf;
+
+       var aTypedArray$a = ArrayBufferViewCore$a.aTypedArray;
+       var exportTypedArrayMethod$b = ArrayBufferViewCore$a.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.lastIndexOf` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.lastindexof
-       // eslint-disable-next-line no-unused-vars -- required for `.length`
-       exportTypedArrayMethod$c('lastIndexOf', function lastIndexOf(searchElement /* , fromIndex */) {
-         return arrayLastIndexOf.apply(aTypedArray$c(this), arguments);
+       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 $map$1 = arrayIteration.map;
-
+       var ArrayBufferViewCore$9 = arrayBufferViewCore;
+       var $map = arrayIteration.map;
+       var typedArraySpeciesConstructor$2 = typedArraySpeciesConstructor$4;
 
-       var aTypedArray$d = arrayBufferViewCore.aTypedArray;
-       var aTypedArrayConstructor$3 = arrayBufferViewCore.aTypedArrayConstructor;
-       var exportTypedArrayMethod$d = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$9 = ArrayBufferViewCore$9.aTypedArray;
+       var exportTypedArrayMethod$a = ArrayBufferViewCore$9.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.map` method
        // https://tc39.es/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$3(speciesConstructor(O, O.constructor)))(length);
+       exportTypedArrayMethod$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 global$t = global$1o;
+       var aCallable$4 = aCallable$a;
+       var toObject$a = toObject$i;
+       var IndexedObject$2 = indexedObject;
+       var lengthOfArrayLike$8 = lengthOfArrayLike$i;
+
+       var TypeError$9 = global$t.TypeError;
+
        // `Array.prototype.{ reduce, reduceRight }` methods implementation
        var createMethod$3 = 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);
+           aCallable$4(callbackfn);
+           var O = toObject$a(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) {
              }
              index += i;
              if (IS_RIGHT ? index < 0 : length <= index) {
-               throw TypeError('Reduce of empty array with no initial value');
+               throw TypeError$9('Reduce of empty array with no initial value');
              }
            }
            for (;IS_RIGHT ? index >= 0 : length > index; index += i) if (index in self) {
          right: createMethod$3(true)
        };
 
-       var $reduce = arrayReduce.left;
+       var ArrayBufferViewCore$8 = arrayBufferViewCore;
+       var $reduce$1 = arrayReduce.left;
 
-       var aTypedArray$e = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$e = arrayBufferViewCore.exportTypedArrayMethod;
+       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$e('reduce', function reduce(callbackfn /* , initialValue */) {
-         return $reduce(aTypedArray$e(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
+       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 $reduceRight = arrayReduce.right;
+       var ArrayBufferViewCore$7 = arrayBufferViewCore;
+       var $reduceRight$1 = arrayReduce.right;
 
-       var aTypedArray$f = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$f = arrayBufferViewCore.exportTypedArrayMethod;
+       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$f('reduceRight', function reduceRight(callbackfn /* , initialValue */) {
-         return $reduceRight(aTypedArray$f(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
+       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 aTypedArray$g = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$g = arrayBufferViewCore.exportTypedArrayMethod;
-       var floor$2 = Math.floor;
+       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$g('reverse', function reverse() {
+       exportTypedArrayMethod$7('reverse', function reverse() {
          var that = this;
-         var length = aTypedArray$g(that).length;
-         var middle = floor$2(length / 2);
+         var length = aTypedArray$6(that).length;
+         var middle = floor$5(length / 2);
          var index = 0;
          var value;
          while (index < middle) {
          } return that;
        });
 
-       var aTypedArray$h = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$h = arrayBufferViewCore.exportTypedArrayMethod;
+       var global$s = global$1o;
+       var call$a = functionCall;
+       var ArrayBufferViewCore$5 = arrayBufferViewCore;
+       var lengthOfArrayLike$7 = lengthOfArrayLike$i;
+       var toOffset = toOffset$2;
+       var toIndexedObject$4 = toObject$i;
+       var fails$y = fails$V;
+
+       var RangeError$6 = global$s.RangeError;
+       var Int8Array$2 = global$s.Int8Array;
+       var Int8ArrayPrototype = Int8Array$2 && Int8Array$2.prototype;
+       var $set = Int8ArrayPrototype && Int8ArrayPrototype.set;
+       var aTypedArray$5 = ArrayBufferViewCore$5.aTypedArray;
+       var exportTypedArrayMethod$6 = ArrayBufferViewCore$5.exportTypedArrayMethod;
+
+       var WORKS_WITH_OBJECTS_AND_GEERIC_ON_TYPED_ARRAYS = !fails$y(function () {
+         // eslint-disable-next-line es/no-typed-arrays -- required for testing
+         var array = new Uint8ClampedArray(2);
+         call$a($set, array, { length: 1, 0: 3 }, 1);
+         return array[1] !== 3;
+       });
 
-       var FORCED$2 = fails(function () {
-         /* global Int8Array -- safe */
-         new Int8Array(1).set({});
+       // https://bugs.chromium.org/p/v8/issues/detail?id=11294 and other
+       var TO_OBJECT_BUG = WORKS_WITH_OBJECTS_AND_GEERIC_ON_TYPED_ARRAYS && ArrayBufferViewCore$5.NATIVE_ARRAY_BUFFER_VIEWS && fails$y(function () {
+         var array = new Int8Array$2(2);
+         array.set(1);
+         array.set('2', 1);
+         return array[0] !== 0 || array[1] !== 2;
        });
 
        // `%TypedArray%.prototype.set` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.set
-       exportTypedArrayMethod$h('set', function set(arrayLike /* , offset */) {
-         aTypedArray$h(this);
+       exportTypedArrayMethod$6('set', function set(arrayLike /* , offset */) {
+         aTypedArray$5(this);
          var offset = toOffset(arguments.length > 1 ? arguments[1] : undefined, 1);
+         var src = toIndexedObject$4(arrayLike);
+         if (WORKS_WITH_OBJECTS_AND_GEERIC_ON_TYPED_ARRAYS) return call$a($set, this, src, offset);
          var length = this.length;
-         var src = toObject(arrayLike);
-         var len = toLength(src.length);
+         var len = lengthOfArrayLike$7(src);
          var index = 0;
-         if (len + offset > length) throw RangeError('Wrong length');
+         if (len + offset > length) throw RangeError$6('Wrong length');
          while (index < len) this[offset + index] = src[index++];
-       }, FORCED$2);
+       }, !WORKS_WITH_OBJECTS_AND_GEERIC_ON_TYPED_ARRAYS || TO_OBJECT_BUG);
+
+       var ArrayBufferViewCore$4 = arrayBufferViewCore;
+       var typedArraySpeciesConstructor$1 = typedArraySpeciesConstructor$4;
+       var fails$x = fails$V;
+       var arraySlice$7 = arraySlice$b;
 
-       var aTypedArray$i = arrayBufferViewCore.aTypedArray;
-       var aTypedArrayConstructor$4 = arrayBufferViewCore.aTypedArrayConstructor;
-       var exportTypedArrayMethod$i = arrayBufferViewCore.exportTypedArrayMethod;
-       var $slice = [].slice;
+       var aTypedArray$4 = ArrayBufferViewCore$4.aTypedArray;
+       var exportTypedArrayMethod$5 = ArrayBufferViewCore$4.exportTypedArrayMethod;
 
-       var FORCED$3 = fails(function () {
-         /* global Int8Array -- safe */
+       var FORCED$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$i('slice', function slice(start, end) {
-         var list = $slice.call(aTypedArray$i(this), start, end);
-         var C = speciesConstructor(this, this.constructor);
+       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 (aTypedArrayConstructor$4(C))(length);
+         var result = new C(length);
          while (length > index) result[index] = list[index++];
          return result;
-       }, FORCED$3);
+       }, FORCED$e);
 
-       var $some = arrayIteration.some;
+       var ArrayBufferViewCore$3 = arrayBufferViewCore;
+       var $some$1 = arrayIteration.some;
 
-       var aTypedArray$j = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$j = arrayBufferViewCore.exportTypedArrayMethod;
+       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$j('some', function some(callbackfn /* , thisArg */) {
-         return $some(aTypedArray$j(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+       exportTypedArrayMethod$4('some', function some(callbackfn /* , thisArg */) {
+         return $some$1(aTypedArray$3(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+       });
+
+       var arraySlice$6 = arraySliceSimple;
+
+       var floor$4 = Math.floor;
+
+       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 insertionSort = function (array, comparefn) {
+         var length = array.length;
+         var i = 1;
+         var element, j;
+
+         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 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 arraySort$1 = mergeSort;
+
+       var userAgent$3 = engineUserAgent;
+
+       var firefox = userAgent$3.match(/firefox\/(\d+)/i);
+
+       var engineFfVersion = !!firefox && +firefox[1];
+
+       var UA = engineUserAgent;
+
+       var engineIsIeOrEdge = /MSIE|Trident/.test(UA);
+
+       var userAgent$2 = engineUserAgent;
+
+       var webkit = userAgent$2.match(/AppleWebKit\/(\d+)\./);
+
+       var engineWebkitVersion = !!webkit && +webkit[1];
+
+       var global$r = global$1o;
+       var uncurryThis$x = functionUncurryThis;
+       var fails$w = fails$V;
+       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;
+
+       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);
+
+       // 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), {});
+       }));
+
+       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;
+
+         var array = new Uint16Array(516);
+         var expected = Array$3(516);
+         var index, mod;
+
+         for (index = 0; index < 516; index++) {
+           mod = index % 4;
+           array[index] = 515 - index;
+           expected[index] = index - 2 * mod + 3;
+         }
+
+         un$Sort$1(array, function (a, b) {
+           return (a / 4 | 0) - (b / 4 | 0);
+         });
+
+         for (index = 0; index < 516; index++) {
+           if (array[index] !== expected[index]) return true;
+         }
        });
 
-       var aTypedArray$k = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$k = arrayBufferViewCore.exportTypedArrayMethod;
-       var $sort = [].sort;
+       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;
+         };
+       };
 
        // `%TypedArray%.prototype.sort` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.sort
-       exportTypedArrayMethod$k('sort', function sort(comparefn) {
-         return $sort.call(aTypedArray$k(this), comparefn);
-       });
+       exportTypedArrayMethod$3('sort', function sort(comparefn) {
+         if (comparefn !== undefined) aCallable$3(comparefn);
+         if (STABLE_SORT$1) return un$Sort$1(this, comparefn);
+
+         return internalSort$1(aTypedArray$2(this), getSortCompare$1(comparefn));
+       }, !STABLE_SORT$1 || ACCEPT_INCORRECT_ARGUMENTS);
 
-       var aTypedArray$l = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$l = arrayBufferViewCore.exportTypedArrayMethod;
+       var ArrayBufferViewCore$1 = arrayBufferViewCore;
+       var toLength$6 = toLength$c;
+       var toAbsoluteIndex$3 = toAbsoluteIndex$9;
+       var typedArraySpeciesConstructor = typedArraySpeciesConstructor$4;
+
+       var aTypedArray$1 = ArrayBufferViewCore$1.aTypedArray;
+       var exportTypedArrayMethod$2 = ArrayBufferViewCore$1.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.subarray` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.subarray
-       exportTypedArrayMethod$l('subarray', function subarray(begin, end) {
-         var O = aTypedArray$l(this);
+       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$1o;
+       var apply$4 = functionApply;
+       var ArrayBufferViewCore = arrayBufferViewCore;
+       var fails$v = fails$V;
+       var arraySlice$5 = arraySlice$b;
+
+       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.es/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;
-
+       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$u = fails$V;
+       var global$p = global$1o;
+       var uncurryThis$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);
          };
        }
 
 
        // `%TypedArray%.prototype.toString` method
        // https://tc39.es/ecma262/#sec-%typedarray%.prototype.tostring
-       exportTypedArrayMethod$n('toString', arrayToString, IS_NOT_ARRAY_METHOD);
+       exportTypedArrayMethod('toString', arrayToString, IS_NOT_ARRAY_METHOD);
+
+       var $$Z = _export;
+       var uncurryThis$v = functionUncurryThis;
+       var IndexedObject$1 = indexedObject;
+       var toIndexedObject$3 = toIndexedObject$d;
+       var arrayMethodIsStrict$5 = arrayMethodIsStrict$9;
 
-       var nativeJoin = [].join;
+       var un$Join = uncurryThis$v([].join);
 
-       var ES3_STRINGS = indexedObject != Object;
-       var STRICT_METHOD$3 = arrayMethodIsStrict('join', ',');
+       var ES3_STRINGS = IndexedObject$1 != Object;
+       var STRICT_METHOD$5 = arrayMethodIsStrict$5('join', ',');
 
        // `Array.prototype.join` method
        // https://tc39.es/ecma262/#sec-array.prototype.join
-       _export({ target: 'Array', proto: true, forced: ES3_STRINGS || !STRICT_METHOD$3 }, {
+       $$Z({ target: 'Array', proto: true, forced: ES3_STRINGS || !STRICT_METHOD$5 }, {
          join: function join(separator) {
-           return nativeJoin.call(toIndexedObject(this), separator === undefined ? ',' : separator);
+           return un$Join(toIndexedObject$3(this), separator === undefined ? ',' : separator);
          }
        });
 
-       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 SPECIES$5 = wellKnownSymbol('species');
-       var nativeSlice = [].slice;
-       var max$1 = Math.max;
+       var $$Y = _export;
+       var global$o = global$1o;
+       var isArray$4 = isArray$8;
+       var isConstructor$1 = isConstructor$4;
+       var isObject$e = isObject$s;
+       var toAbsoluteIndex$2 = toAbsoluteIndex$9;
+       var lengthOfArrayLike$6 = lengthOfArrayLike$i;
+       var toIndexedObject$2 = toIndexedObject$d;
+       var createProperty$3 = createProperty$5;
+       var wellKnownSymbol$8 = wellKnownSymbol$t;
+       var arrayMethodHasSpeciesSupport$3 = arrayMethodHasSpeciesSupport$5;
+       var un$Slice = arraySlice$b;
+
+       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
-       _export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$1 }, {
+       $$Y({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$2 }, {
          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);
+           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(O)) {
+           if (isArray$4(O)) {
              Constructor = O.constructor;
              // cross-realm fallback
-             if (typeof Constructor == 'function' && (Constructor === Array || isArray(Constructor.prototype))) {
+             if (isConstructor$1(Constructor) && (Constructor === Array$2 || isArray$4(Constructor.prototype))) {
                Constructor = undefined;
-             } else if (isObject(Constructor)) {
-               Constructor = Constructor[SPECIES$5];
+             } else if (isObject$e(Constructor)) {
+               Constructor = Constructor[SPECIES$1];
                if (Constructor === null) Constructor = undefined;
              }
-             if (Constructor === Array || Constructor === undefined) {
-               return nativeSlice.call(O, k, fin);
+             if (Constructor === Array$2 || Constructor === undefined) {
+               return un$Slice(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 = 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$V;
+       var wellKnownSymbol$7 = wellKnownSymbol$t;
+       var IS_PURE = isPure;
 
-       var nativeUrl = !fails(function () {
+       var ITERATOR$3 = wellKnownSymbol$7('iterator');
+
+       var nativeUrl = !fails$t(function () {
+         // eslint-disable-next-line unicorn/relative-url-style -- required for testing
          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$5 = Object.defineProperty;
-
-       // `Object.assign` method
-       // https://tc39.es/ecma262/#sec-object.assign
-       var objectAssign = !nativeAssign || fails(function () {
-         // should have correct order of operations (Edge bug)
-         if (descriptors && nativeAssign({ b: 1 }, nativeAssign(defineProperty$5({}, 'a', {
-           enumerable: true,
-           get: function () {
-             defineProperty$5(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 = {};
-         /* global Symbol -- required for testing */
-         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 -- required for `.length`
-         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;
-
-       // 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) {
-           iteratorClose(iterator);
-           throw error;
-         }
-       };
-
-       // `Array.from` method implementation
-       // https://tc39.es/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$3 = 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$3(delta / damp) : delta >> 1;
-         delta += floor$3(delta / numPoints);
-         for (; delta > baseMinusTMin * tMax >> 1; k += base) {
-           delta = floor$3(delta / baseMinusTMin);
-         }
-         return floor$3(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 -- TODO
-       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$3((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$3(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$1o;
+       var getBuiltIn$2 = getBuiltIn$b;
+       var call$9 = functionCall;
+       var uncurryThis$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 validateArgumentsLength$2 = validateArgumentsLength$4;
+       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);
-       };
-
-       var parseSearchParams = function (result, query) {
-         if (query) {
-           var attributes = query.split('&');
-           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('='))
-               });
-             }
-           }
-         }
-       };
-
-       var updateSearchParams = function (query) {
-         this.entries.length = 0;
-         parseSearchParams(this.entries, query);
-       };
-
-       var validateArgumentsLength = function (passed, required) {
-         if (passed < required) throw TypeError('Not enough arguments');
+         return replace$6(encodeURIComponent$1(it), find$1, replacer);
        };
 
        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() {
          if (!step.done) {
            step.value = kind === 'keys' ? entry.key : kind === 'values' ? entry.value : [entry.key, entry.value];
          } return step;
-       });
+       }, true);
 
-       // `URLSearchParams` constructor
-       // https://url.spec.whatwg.org/#interface-urlsearchparams
-       var URLSearchParamsConstructor = function URLSearchParams(/* init */) {
-         anInstance(this, URLSearchParamsConstructor, URL_SEARCH_PARAMS);
-         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, {
-           type: URL_SEARCH_PARAMS,
-           entries: entries,
-           updateURL: function () { /* empty */ },
-           updateSearchParams: updateSearchParams
-         });
+       var URLSearchParamsState = function (init) {
+         this.entries = [];
+         this.url = null;
 
          if (init !== undefined) {
-           if (isObject(init)) {
-             iteratorMethod = getIteratorMethod(init);
-             if (typeof iteratorMethod === 'function') {
-               iterator = iteratorMethod.call(init);
-               next = iterator.next;
-               while (!(step = next.call(iterator)).done) {
-                 entryIterator = getIterator(anObject(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 + '' });
+           if (isObject$d(init)) this.parseObject(init);
+           else this.parseQuery(typeof init == 'string' ? charAt$5(init, 0) === '?' ? stringSlice$8(init, 1) : init : $toString$2(init));
+         }
+       };
+
+       URLSearchParamsState.prototype = {
+         type: URL_SEARCH_PARAMS,
+         bindURL: function (url) {
+           this.url = url;
+           this.update();
+         },
+         parseObject: function (object) {
+           var iteratorMethod = getIteratorMethod$1(object);
+           var iterator, next, step, entryIterator, entryNext, first, second;
+
+           if (iteratorMethod) {
+             iterator = getIterator$1(object, iteratorMethod);
+             next = iterator.next;
+             while (!(step = call$9(next, iterator)).done) {
+               entryIterator = getIterator$1(anObject$9(step.value));
+               entryNext = entryIterator.next;
+               if (
+                 (first = call$9(entryNext, entryIterator)).done ||
+                 (second = call$9(entryNext, entryIterator)).done ||
+                 !call$9(entryNext, entryIterator).done
+               ) throw TypeError$8('Expected sequence with length 2');
+               push$7(this.entries, { key: $toString$2(first.value), value: $toString$2(second.value) });
+             }
+           } else for (var key in object) if (hasOwn$6(object, key)) {
+             push$7(this.entries, { key: key, value: $toString$2(object[key]) });
+           }
+         },
+         parseQuery: function (query) {
+           if (query) {
+             var attributes = split$3(query, '&');
+             var index = 0;
+             var attribute, entry;
+             while (index < attributes.length) {
+               attribute = attributes[index++];
+               if (attribute.length) {
+                 entry = split$3(attribute, '=');
+                 push$7(this.entries, {
+                   key: deserialize(shift$1(entry)),
+                   value: deserialize(join$4(entry, '='))
+                 });
                }
-             } else for (key in init) if (has(init, key)) entries.push({ key: key, value: init[key] + '' });
-           } else {
-             parseSearchParams(entries, typeof init === 'string' ? init.charAt(0) === '?' ? init.slice(1) : init : init + '');
+             }
            }
+         },
+         serialize: function () {
+           var entries = this.entries;
+           var result = [];
+           var index = 0;
+           var entry;
+           while (index < entries.length) {
+             entry = entries[index++];
+             push$7(result, serialize(entry.key) + '=' + serialize(entry.value));
+           } return join$4(result, '&');
+         },
+         update: function () {
+           this.entries.length = 0;
+           this.parseQuery(this.url.query);
+         },
+         updateURL: function () {
+           if (this.url) this.url.update();
          }
        };
 
+       // `URLSearchParams` constructor
+       // https://url.spec.whatwg.org/#interface-urlsearchparams
+       var URLSearchParamsConstructor = function URLSearchParams(/* init */) {
+         anInstance$3(this, URLSearchParamsPrototype);
+         var init = arguments.length > 0 ? arguments[0] : undefined;
+         setInternalState$2(this, new URLSearchParamsState(init));
+       };
+
        var URLSearchParamsPrototype = URLSearchParamsConstructor.prototype;
 
-       redefineAll(URLSearchParamsPrototype, {
+       redefineAll$1(URLSearchParamsPrototype, {
          // `URLSearchParams.prototype.append` method
          // https://url.spec.whatwg.org/#dom-urlsearchparams-append
          append: function append(name, value) {
-           validateArgumentsLength(arguments.length, 2);
+           validateArgumentsLength$2(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
          // https://url.spec.whatwg.org/#dom-urlsearchparams-delete
          'delete': function (name) {
-           validateArgumentsLength(arguments.length, 1);
+           validateArgumentsLength$2(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();
          // `URLSearchParams.prototype.get` method
          // https://url.spec.whatwg.org/#dom-urlsearchparams-get
          get: function get(name) {
-           validateArgumentsLength(arguments.length, 1);
+           validateArgumentsLength$2(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;
          // `URLSearchParams.prototype.getAll` method
          // https://url.spec.whatwg.org/#dom-urlsearchparams-getall
          getAll: function getAll(name) {
-           validateArgumentsLength(arguments.length, 1);
+           validateArgumentsLength$2(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;
          },
          // `URLSearchParams.prototype.has` method
          // https://url.spec.whatwg.org/#dom-urlsearchparams-has
          has: function has(name) {
-           validateArgumentsLength(arguments.length, 1);
+           validateArgumentsLength$2(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;
          // `URLSearchParams.prototype.set` method
          // https://url.spec.whatwg.org/#dom-urlsearchparams-set
          set: function set(name, value) {
-           validateArgumentsLength(arguments.length, 1);
+           validateArgumentsLength$2(arguments.length, 1);
            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() {
-         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('&');
+       redefine$7(URLSearchParamsPrototype, 'toString', function toString() {
+         return getInternalParamsState(this).serialize();
        }, { 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$s = fails$V;
+       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$V;
+       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];
+           }
 
+           re.exec = function () { execCalled = true; return null; };
 
-       var codeAt = stringMultibyte.codeAt;
+           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 charAt$4 = stringMultibyte.charAt;
 
-       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$4 = Math.floor;
-       var pow$1 = Math.pow;
+       // `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 INVALID_AUTHORITY = 'Invalid authority';
-       var INVALID_SCHEME = 'Invalid scheme';
-       var INVALID_HOST = 'Invalid host';
-       var INVALID_PORT = 'Invalid port';
+       var uncurryThis$r = functionUncurryThis;
+       var toObject$9 = toObject$i;
 
-       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]+$/;
-       /* eslint-disable no-control-regex -- safe */
-       var FORBIDDEN_HOST_CODE_POINT = /[\u0000\t\u000A\u000D #%/:?@[\\]]/;
-       var FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT = /[\u0000\t\u000A\u000D #/:?@[\\]]/;
-       var LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE = /^[\u0000-\u001F ]+|[\u0000-\u001F ]+$/g;
-       var TAB_AND_NEW_LINE = /[\t\u000A\u000D]/g;
-       /* eslint-enable no-control-regex -- safe */
-       var EOF;
+       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;
 
-       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);
-           }
-           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;
+       // `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];
+           }
+           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();
+       var global$m = global$1o;
+       var call$8 = 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$8(exec, R, S);
+           if (result !== null) anObject$7(result);
+           return result;
          }
-         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);
-         }
-         return ipv4;
+         if (classof$2(R) === 'RegExp') return call$8(regexpExec$1, R, S);
+         throw TypeError$7('RegExp#exec called on incompatible receiver');
        };
 
-       // 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;
-
-         var char = function () {
-           return input.charAt(pointer);
-         };
+       var apply$3 = functionApply;
+       var call$7 = functionCall;
+       var uncurryThis$q = functionUncurryThis;
+       var fixRegExpWellKnownSymbolLogic$3 = fixRegexpWellKnownSymbolLogic;
+       var fails$q = fails$V;
+       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);
 
-         if (char() == ':') {
-           if (input.charAt(1) != ':') return;
-           pointer += 2;
-           pieceIndex++;
-           compress = pieceIndex;
-         }
-         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;
-               }
-               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++;
-               }
-               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;
-           }
-         } else if (pieceIndex != 8) return;
-         return address;
+       var maybeToString = function (it) {
+         return it === undefined ? it : String(it);
        };
 
-       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 {
-             if (currStart === null) currStart = index;
-             ++currLength;
-           }
-         }
-         if (currLength > maxLength) {
-           maxIndex = currStart;
-           maxLength = currLength;
-         }
-         return maxIndex;
-       };
+       // 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';
+       })();
 
-       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$4(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 '[' + result + ']';
-         } return host;
-       };
+       // 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 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
+       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';
        });
 
-       var percentEncode = function (char, set) {
-         var code = codeAt(char, 0);
-         return code > 0x20 && code < 0x7F && !has(set, char) ? char : encodeURIComponent(char);
-       };
-
-       var specialSchemes = {
-         ftp: 21,
-         file: null,
-         http: 80,
-         https: 443,
-         ws: 80,
-         wss: 443
-       };
+       // @@replace logic
+       fixRegExpWellKnownSymbolLogic$3('replace', function (_, nativeReplace, maybeCallNative) {
+         var UNSAFE_SUBSTITUTE = REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE ? '$' : '$0';
 
-       var isSpecial = function (url) {
-         return has(specialSchemes, url.scheme);
-       };
+         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$7(replacer, searchValue, O, replaceValue)
+               : call$7(nativeReplace, toString$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);
 
-       var includesCredentials = function (url) {
-         return url.username != '' || url.password != '';
-       };
+             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 cannotHaveUsernamePasswordPort = function (url) {
-         return !url.host || url.cannotBeABaseURL || url.scheme == 'file';
-       };
+             var functionalReplace = isCallable$3(replaceValue);
+             if (!functionalReplace) replaceValue = toString$f(replaceValue);
 
-       var isWindowsDriveLetter = function (string, normalized) {
-         var second;
-         return string.length == 2 && ALPHA.test(string.charAt(0))
-           && ((second = string.charAt(1)) == ':' || (!normalized && second == '|'));
-       };
+             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;
 
-       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 === '#')
-         );
-       };
+               push$6(results, result);
+               if (!global) break;
 
-       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 matchStr = toString$f(result[0]);
+               if (matchStr === '') rx.lastIndex = advanceStringIndex$2(S, toLength$5(rx.lastIndex), fullUnicode);
+             }
 
-       var isSingleDot = function (segment) {
-         return segment === '.' || segment.toLowerCase() === '%2e';
-       };
+             var accumulatedResult = '';
+             var nextSourcePosition = 0;
+             for (var i = 0; i < results.length; i++) {
+               result = results[i];
 
-       var isDoubleDot = function (segment) {
-         segment = segment.toLowerCase();
-         return segment === '..' || segment === '%2e.' || segment === '.%2e' || segment === '%2e%2e';
-       };
+               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 (position >= nextSourcePosition) {
+                 accumulatedResult += stringSlice$6(S, nextSourcePosition, position) + replacement;
+                 nextSourcePosition = position + matched.length;
+               }
+             }
+             return accumulatedResult + stringSlice$6(S, nextSourcePosition);
+           }
+         ];
+       }, !REPLACE_SUPPORTS_NAMED_GROUPS || !REPLACE_KEEPS_$0 || REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE);
 
-       // 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 = {};
+       var isObject$c = isObject$s;
+       var classof$1 = classofRaw$1;
+       var wellKnownSymbol$3 = wellKnownSymbol$t;
 
-       // 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, char, bufferCodePoints, failure;
-
-         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, '');
-         }
-
-         input = input.replace(TAB_AND_NEW_LINE, '');
-
-         codePoints = arrayFrom(input);
-
-         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 MATCH$2 = wellKnownSymbol$3('match');
 
-             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;
+       // `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');
+       };
 
-             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;
+       var apply$2 = functionApply;
+       var call$6 = functionCall;
+       var uncurryThis$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 = arraySliceSimple;
+       var callRegExpExec = regexpExecAbstract;
+       var regexpExec = regexpExec$3;
+       var stickyHelpers$1 = regexpStickyHelpers;
+       var fails$p = fails$V;
+
+       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);
 
-             case SPECIAL_RELATIVE_OR_AUTHORITY:
-               if (char == '/' && codePoints[pointer + 1] == '/') {
-                 state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
-                 pointer++;
-               } else {
-                 state = RELATIVE;
-                 continue;
-               } break;
+       // 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';
+       });
 
-             case PATH_OR_AUTHORITY:
-               if (char == '/') {
-                 state = AUTHORITY;
-                 break;
-               } else {
-                 state = PATH;
-                 continue;
+       // @@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$6(nativeSplit, 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 = call$6(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$6(nativeSplit, this, separator, limit);
+           };
+         } else internalSplit = nativeSplit;
 
-             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;
+         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$6(splitter, separator, O, limit)
+               : call$6(internalSplit, toString$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);
 
-             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 (res.done) return res.value;
 
-             case SPECIAL_AUTHORITY_SLASHES:
-               state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
-               if (char != '/' || buffer.charAt(pointer + 1) != '/') continue;
-               pointer++;
-               break;
+             var C = speciesConstructor$1(rx, RegExp);
 
-             case SPECIAL_AUTHORITY_IGNORE_SLASHES:
-               if (char != '/' && char != '\\') {
-                 state = AUTHORITY;
-                 continue;
-               } break;
-
-             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;
+             var unicodeMatching = rx.unicode;
+             var flags = (rx.ignoreCase ? 'i' : '') +
+                         (rx.multiline ? 'm' : '') +
+                         (rx.unicode ? 'u' : '') +
+                         (UNSUPPORTED_Y$1 ? 'g' : 'y');
 
-             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))
+             // ^(? + 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
                ) {
-                 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;
+                 q = advanceStringIndex$1(S, q, unicodeMatching);
                } else {
-                 if (char == '[') seenBracket = true;
-                 else if (char == ']') seenBracket = false;
-                 buffer += char;
-               } break;
-
-             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;
-
-             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;
+                 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;
                  }
-               } else {
-                 state = PATH;
-                 continue;
-               } break;
-
-             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;
+                 q = p = e;
                }
-               state = PATH;
-               continue;
+             }
+             push$5(A, stringSlice$5(S, p));
+             return A;
+           }
+         ];
+       }, !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC, UNSUPPORTED_Y$1);
 
-             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;
+       // 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';
 
-             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;
+       var uncurryThis$o = functionUncurryThis;
+       var requireObjectCoercible$8 = requireObjectCoercible$e;
+       var toString$d = toString$k;
+       var whitespaces$3 = whitespaces$4;
 
-             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;
-
-             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;
-
-             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;
-
-             case FRAGMENT:
-               if (char != EOF) url.fragment += percentEncode(char, fragmentPercentEncodeSet);
-               break;
-           }
+       var replace$4 = uncurryThis$o(''.replace);
+       var whitespace = '[' + whitespaces$3 + ']';
+       var ltrim = RegExp('^' + whitespace + whitespace + '*');
+       var rtrim$2 = RegExp(whitespace + whitespace + '*$');
 
-           pointer++;
-         }
+       // `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;
+         };
        };
 
-       // `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);
-         }
+       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 URLPrototype = URLConstructor.prototype;
+       var PROPER_FUNCTION_NAME = functionName.PROPER;
+       var fails$o = fails$V;
+       var whitespaces$2 = whitespaces$4;
 
-       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;
+       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$o(function () {
+           return !!whitespaces$2[METHOD_NAME]()
+             || non[METHOD_NAME]() !== non
+             || (PROPER_FUNCTION_NAME && whitespaces$2[METHOD_NAME].name !== METHOD_NAME);
+         });
        };
 
-       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';
+       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);
          }
-         if (scheme == 'file' || !isSpecial(url)) return 'null';
-         return scheme + '://' + serializeHost(url.host) + (port !== null ? ':' + port : '');
-       };
+       });
 
-       var getProtocol = function () {
-         return getInternalURLState(this).scheme + ':';
-       };
+       var DESCRIPTORS$b = descriptors;
+       var FUNCTION_NAME_EXISTS = functionName.EXISTS;
+       var uncurryThis$n = functionUncurryThis;
+       var defineProperty$6 = objectDefineProperty.f;
 
-       var getUsername = function () {
-         return getInternalURLState(this).username;
-       };
+       var FunctionPrototype = Function.prototype;
+       var functionToString = uncurryThis$n(FunctionPrototype.toString);
+       var nameRE = /function\b(?:\s|\/\*[\S\s]*?\*\/|\/\/[^\n\r]*[\n\r]+)*([^\s(/]*)/;
+       var regExpExec$2 = uncurryThis$n(nameRE.exec);
+       var NAME = 'name';
 
-       var getPassword = function () {
-         return getInternalURLState(this).password;
-       };
+       // Function instances `.name` property
+       // https://tc39.es/ecma262/#sec-function-instances-name
+       if (DESCRIPTORS$b && !FUNCTION_NAME_EXISTS) {
+         defineProperty$6(FunctionPrototype, NAME, {
+           configurable: true,
+           get: function () {
+             try {
+               return regExpExec$2(nameRE, functionToString(this))[1];
+             } catch (error) {
+               return '';
+             }
+           }
+         });
+       }
 
-       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;
-       };
+       var $$V = _export;
+       var DESCRIPTORS$a = descriptors;
+       var create$5 = objectCreate;
 
-       var getHostname = function () {
-         var host = getInternalURLState(this).host;
-         return host === null ? '' : serializeHost(host);
-       };
+       // `Object.create` method
+       // https://tc39.es/ecma262/#sec-object.create
+       $$V({ target: 'Object', stat: true, sham: !DESCRIPTORS$a }, {
+         create: create$5
+       });
 
-       var getPort = function () {
-         var port = getInternalURLState(this).port;
-         return port === null ? '' : String(port);
-       };
+       var $$U = _export;
+       var global$l = global$1o;
+       var apply$1 = functionApply;
+       var isCallable$2 = isCallable$r;
+       var userAgent$1 = engineUserAgent;
+       var arraySlice$3 = arraySlice$b;
+       var validateArgumentsLength$1 = validateArgumentsLength$4;
 
-       var getPathname = function () {
-         var url = getInternalURLState(this);
-         var path = url.path;
-         return url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';
-       };
+       var MSIE = /MSIE .\./.test(userAgent$1); // <- dirty ie9- check
+       var Function$2 = global$l.Function;
 
-       var getSearch = function () {
-         var query = getInternalURLState(this).query;
-         return query ? '?' + query : '';
+       var wrap$1 = function (scheduler) {
+         return function (handler, timeout /* , ...arguments */) {
+           var boundArgs = validateArgumentsLength$1(arguments.length, 1) > 2;
+           var fn = isCallable$2(handler) ? handler : Function$2(handler);
+           var args = boundArgs ? arraySlice$3(arguments, 2) : undefined;
+           return scheduler(boundArgs ? function () {
+             apply$1(fn, this, args);
+           } : fn, timeout);
+         };
        };
 
-       var getSearchParams = function () {
-         return getInternalURLState(this).searchParams;
-       };
+       // 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)
+       });
 
-       var getHash = function () {
-         var fragment = getInternalURLState(this).fragment;
-         return fragment ? '#' + fragment : '';
+       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
        };
 
-       var accessorDescriptor = function (getter, setter) {
-         return { get: getter, set: setter, configurable: true, enumerable: true };
-       };
+       function isDataView(obj) {
+         return obj && DataView.prototype.isPrototypeOf(obj);
+       }
 
-       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);
-           })
-         });
+       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;
+         };
        }
 
-       // `URL.prototype.toJSON` method
-       // https://url.spec.whatwg.org/#dom-url-tojson
-       redefine(URLPrototype, 'toJSON', function toJSON() {
-         return serializeURL.call(this);
-       }, { enumerable: true });
+       function normalizeName(name) {
+         if (typeof name !== 'string') {
+           name = String(name);
+         }
 
-       // `URL.prototype.toString` method
-       // https://url.spec.whatwg.org/#URL-stringification-behavior
-       redefine(URLPrototype, 'toString', function toString() {
-         return serializeURL.call(this);
-       }, { enumerable: true });
+         if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
+           throw new TypeError('Invalid character in header field name: "' + name + '"');
+         }
 
-       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 -- required for `.length`
-         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 -- required for `.length`
-         if (nativeRevokeObjectURL) redefine(URLConstructor, 'revokeObjectURL', function revokeObjectURL(url) {
-           return nativeRevokeObjectURL.apply(NativeURL, arguments);
-         });
+         return name.toLowerCase();
        }
 
-       setToStringTag(URLConstructor, 'URL');
-
-       _export({ global: true, forced: !nativeUrl, sham: !descriptors }, {
-         URL: URLConstructor
-       });
+       function normalizeValue(value) {
+         if (typeof value !== 'string') {
+           value = String(value);
+         }
 
-       // `RegExp.prototype.flags` getter implementation
-       // https://tc39.es/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;
-       };
+         return value;
+       } // Build a destructive iterator for the value list
 
-       var TO_STRING$1 = 'toString';
-       var RegExpPrototype = RegExp.prototype;
-       var nativeToString = RegExpPrototype[TO_STRING$1];
 
-       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;
+       function iteratorFor(items) {
+         var iterator = {
+           next: function next() {
+             var value = items.shift();
+             return {
+               done: value === undefined,
+               value: value
+             };
+           }
+         };
 
-       // `RegExp.prototype.toString` method
-       // https://tc39.es/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 });
-       }
+         if (support.iterable) {
+           iterator[Symbol.iterator] = function () {
+             return iterator;
+           };
+         }
 
-       // 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);
+         return iterator;
        }
 
-       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;
-       });
+       function Headers(headers) {
+         this.map = {};
 
-       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;
-       });
+         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);
+         }
+       }
 
-       var regexpStickyHelpers = {
-               UNSUPPORTED_Y: UNSUPPORTED_Y,
-               BROKEN_CARET: BROKEN_CARET
+       Headers.prototype.append = function (name, value) {
+         name = normalizeName(name);
+         value = normalizeValue(value);
+         var oldValue = this.map[name];
+         this.map[name] = oldValue ? oldValue + ', ' + value : value;
        };
 
-       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;
+       Headers.prototype['delete'] = function (name) {
+         delete this.map[normalizeName(name)];
+       };
 
-       var patchedExec = nativeExec;
+       Headers.prototype.get = function (name) {
+         name = normalizeName(name);
+         return this.has(name) ? this.map[name] : null;
+       };
 
-       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;
-       })();
+       Headers.prototype.has = function (name) {
+         return this.map.hasOwnProperty(normalizeName(name));
+       };
 
-       var UNSUPPORTED_Y$1 = regexpStickyHelpers.UNSUPPORTED_Y || regexpStickyHelpers.BROKEN_CARET;
+       Headers.prototype.set = function (name, value) {
+         this.map[normalizeName(name)] = normalizeValue(value);
+       };
 
-       // nonparticipating capturing group, copied from es5-shim's String#split patch.
-       // eslint-disable-next-line regexp/no-assertion-capturing-group, regexp/no-empty-group -- required for testing
-       var NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;
+       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);
+           }
+         }
+       };
 
-       var PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED || UNSUPPORTED_Y$1;
+       Headers.prototype.keys = function () {
+         var items = [];
+         this.forEach(function (value, name) {
+           items.push(name);
+         });
+         return iteratorFor(items);
+       };
 
-       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;
+       Headers.prototype.values = function () {
+         var items = [];
+         this.forEach(function (value) {
+           items.push(value);
+         });
+         return iteratorFor(items);
+       };
 
-           if (sticky) {
-             flags = flags.replace('y', '');
-             if (flags.indexOf('g') === -1) {
-               flags += 'g';
-             }
+       Headers.prototype.entries = function () {
+         var items = [];
+         this.forEach(function (value, name) {
+           items.push([name, value]);
+         });
+         return iteratorFor(items);
+       };
 
-             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);
-           }
+       if (support.iterable) {
+         Headers.prototype[Symbol.iterator] = Headers.prototype.entries;
+       }
 
-           if (NPCG_INCLUDED) {
-             reCopy = new RegExp('^' + source + '$(?!\\s)', flags);
-           }
-           if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;
+       function consumed(body) {
+         if (body.bodyUsed) {
+           return Promise.reject(new TypeError('Already read'));
+         }
 
-           match = nativeExec.call(sticky ? reCopy : re, strCopy);
+         body.bodyUsed = true;
+       }
 
-           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;
-               }
-             });
-           }
+       function fileReaderReady(reader) {
+         return new Promise(function (resolve, reject) {
+           reader.onload = function () {
+             resolve(reader.result);
+           };
 
-           return match;
-         };
+           reader.onerror = function () {
+             reject(reader.error);
+           };
+         });
        }
 
-       var regexpExec = patchedExec;
+       function readBlobAsArrayBuffer(blob) {
+         var reader = new FileReader();
+         var promise = fileReaderReady(reader);
+         reader.readAsArrayBuffer(blob);
+         return promise;
+       }
 
-       // `RegExp.prototype.exec` method
-       // https://tc39.es/ecma262/#sec-regexp.prototype.exec
-       _export({ target: 'RegExp', proto: true, forced: /./.exec !== regexpExec }, {
-         exec: regexpExec
-       });
+       function readBlobAsText(blob) {
+         var reader = new FileReader();
+         var promise = fileReaderReady(reader);
+         reader.readAsText(blob);
+         return promise;
+       }
 
-       // TODO: Remove from `core-js@4` since it's moved to entry points
+       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]);
+         }
 
+         return chars.join('');
+       }
 
+       function bufferClone(buf) {
+         if (buf.slice) {
+           return buf.slice(0);
+         } else {
+           var view = new Uint8Array(buf.byteLength);
+           view.set(new Uint8Array(buf));
+           return view.buffer;
+         }
+       }
 
+       function Body() {
+         this.bodyUsed = false;
 
+         this._initBody = function (body) {
+           /*
+             fetch-mock wraps the Response object in an ES6 Proxy to
+             provide useful test harness features such as flush. However, on
+             ES5 browsers without fetch or Proxy support pollyfills must be used;
+             the proxy-pollyfill is unable to proxy an attribute unless it exists
+             on the object before the Proxy is created. This change ensures
+             Response.bodyUsed exists on the instance, while maintaining the
+             semantic of setting Request.bodyUsed in the constructor before
+             _initBody is called.
+           */
+           this.bodyUsed = this.bodyUsed;
+           this._bodyInit = body;
 
+           if (!body) {
+             this._bodyText = '';
+           } else if (typeof body === 'string') {
+             this._bodyText = body;
+           } else if (support.blob && Blob.prototype.isPrototypeOf(body)) {
+             this._bodyBlob = body;
+           } else if (support.formData && FormData.prototype.isPrototypeOf(body)) {
+             this._bodyFormData = body;
+           } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
+             this._bodyText = body.toString();
+           } else if (support.arrayBuffer && support.blob && isDataView(body)) {
+             this._bodyArrayBuffer = bufferClone(body.buffer); // IE 10-11 can't handle a DataView body.
 
-       var SPECIES$6 = wellKnownSymbol('species');
+             this._bodyInit = new Blob([this._bodyArrayBuffer]);
+           } else if (support.arrayBuffer && (ArrayBuffer.prototype.isPrototypeOf(body) || isArrayBufferView(body))) {
+             this._bodyArrayBuffer = bufferClone(body);
+           } else {
+             this._bodyText = body = Object.prototype.toString.call(body);
+           }
 
-       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;
+           if (!this.headers.get('content-type')) {
+             if (typeof body === 'string') {
+               this.headers.set('content-type', 'text/plain;charset=UTF-8');
+             } else if (this._bodyBlob && this._bodyBlob.type) {
+               this.headers.set('content-type', this._bodyBlob.type);
+             } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
+               this.headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
+             }
+           }
          };
-         return ''.replace(re, '$<a>') !== '7';
-       });
 
-       // 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';
-       })();
+         if (support.blob) {
+           this.blob = function () {
+             var rejected = consumed(this);
 
-       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;
-       })();
+             if (rejected) {
+               return rejected;
+             }
 
-       // 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 () {
-         // 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';
-       });
+             if (this._bodyBlob) {
+               return Promise.resolve(this._bodyBlob);
+             } else if (this._bodyArrayBuffer) {
+               return Promise.resolve(new Blob([this._bodyArrayBuffer]));
+             } else if (this._bodyFormData) {
+               throw new Error('could not read FormData body as blob');
+             } else {
+               return Promise.resolve(new Blob([this._bodyText]));
+             }
+           };
 
-       var fixRegexpWellKnownSymbolLogic = function (KEY, length, exec, sham) {
-         var SYMBOL = wellKnownSymbol(KEY);
+           this.arrayBuffer = function () {
+             if (this._bodyArrayBuffer) {
+               var isConsumed = consumed(this);
 
-         var DELEGATES_TO_SYMBOL = !fails(function () {
-           // String methods call symbol-named RegEp methods
-           var O = {};
-           O[SYMBOL] = function () { return 7; };
-           return ''[KEY](O) != 7;
-         });
+               if (isConsumed) {
+                 return isConsumed;
+               }
 
-         var DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL && !fails(function () {
-           // Symbol-named RegExp methods call .exec
-           var execCalled = false;
-           var re = /a/;
+               if (ArrayBuffer.isView(this._bodyArrayBuffer)) {
+                 return Promise.resolve(this._bodyArrayBuffer.buffer.slice(this._bodyArrayBuffer.byteOffset, this._bodyArrayBuffer.byteOffset + this._bodyArrayBuffer.byteLength));
+               } else {
+                 return Promise.resolve(this._bodyArrayBuffer);
+               }
+             } else {
+               return this.blob().then(readBlobAsArrayBuffer);
+             }
+           };
+         }
 
-           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];
-           }
+         this.text = function () {
+           var rejected = consumed(this);
 
-           re.exec = function () { execCalled = true; return null; };
+           if (rejected) {
+             return rejected;
+           }
 
-           re[SYMBOL]('');
-           return !execCalled;
-         });
+           if (this._bodyBlob) {
+             return readBlobAsText(this._bodyBlob);
+           } else if (this._bodyArrayBuffer) {
+             return Promise.resolve(readArrayBufferAsText(this._bodyArrayBuffer));
+           } else if (this._bodyFormData) {
+             throw new Error('could not read FormData body as text');
+           } else {
+             return Promise.resolve(this._bodyText);
+           }
+         };
 
-         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); }
-           );
+         if (support.formData) {
+           this.formData = function () {
+             return this.text().then(decode);
+           };
          }
 
-         if (sham) createNonEnumerableProperty(RegExp.prototype[SYMBOL], 'sham', true);
-       };
+         this.json = function () {
+           return this.text().then(JSON.parse);
+         };
 
-       var charAt$1 = stringMultibyte.charAt;
+         return this;
+       } // HTTP methods whose capitalization should be normalized
 
-       // `AdvanceStringIndex` abstract operation
-       // https://tc39.es/ecma262/#sec-advancestringindex
-       var advanceStringIndex = function (S, index, unicode) {
-         return index + (unicode ? charAt$1(S, index).length : 1);
-       };
 
-       var floor$5 = Math.floor;
-       var replace$1 = ''.replace;
-       var SUBSTITUTION_SYMBOLS = /\$([$&'`]|\d{1,2}|<[^>]*>)/g;
-       var SUBSTITUTION_SYMBOLS_NO_NAMED = /\$([$&'`]|\d{1,2})/g;
+       var methods = ['DELETE', 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT'];
 
-       // https://tc39.es/ecma262/#sec-getsubstitution
-       var getSubstitution = 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(namedCaptures);
-           symbols = SUBSTITUTION_SYMBOLS;
+       function normalizeMethod(method) {
+         var upcased = method.toUpperCase();
+         return methods.indexOf(upcased) > -1 ? upcased : method;
+       }
+
+       function Request(input, options) {
+         if (!(this instanceof Request)) {
+           throw new TypeError('Please use the "new" operator, this DOM object constructor cannot be called as a function.');
          }
-         return replace$1.call(replacement, symbols, function (match, ch) {
-           var capture;
-           switch (ch.charAt(0)) {
-             case '$': 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$5(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];
+
+         options = options || {};
+         var body = options.body;
+
+         if (input instanceof Request) {
+           if (input.bodyUsed) {
+             throw new TypeError('Already read');
            }
-           return capture === undefined ? '' : capture;
-         });
-       };
 
-       // `RegExpExec` abstract operation
-       // https://tc39.es/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');
+           this.url = input.url;
+           this.credentials = input.credentials;
+
+           if (!options.headers) {
+             this.headers = new Headers(input.headers);
            }
-           return result;
-         }
 
-         if (classofRaw(R) !== 'RegExp') {
-           throw TypeError('RegExp#exec called on incompatible receiver');
+           this.method = input.method;
+           this.mode = input.mode;
+           this.signal = input.signal;
+
+           if (!body && input._bodyInit != null) {
+             body = input._bodyInit;
+             input.bodyUsed = true;
+           }
+         } else {
+           this.url = String(input);
          }
 
-         return regexpExec.call(R, S);
-       };
+         this.credentials = options.credentials || this.credentials || 'same-origin';
 
-       var max$2 = Math.max;
-       var min$4 = Math.min;
+         if (options.headers || !this.headers) {
+           this.headers = new Headers(options.headers);
+         }
 
-       var maybeToString = function (it) {
-         return it === undefined ? it : String(it);
-       };
-
-       // @@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';
-
-         return [
-           // `String.prototype.replace` method
-           // https://tc39.es/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.es/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 rx = anObject(regexp);
-             var S = String(this);
-
-             var functionalReplace = typeof replaceValue === 'function';
-             if (!functionalReplace) replaceValue = String(replaceValue);
-
-             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;
+         this.method = normalizeMethod(options.method || this.method || 'GET');
+         this.mode = options.mode || this.mode || null;
+         this.signal = options.signal || this.signal;
+         this.referrer = null;
 
-               results.push(result);
-               if (!global) break;
+         if ((this.method === 'GET' || this.method === 'HEAD') && body) {
+           throw new TypeError('Body not allowed for GET or HEAD requests');
+         }
 
-               var matchStr = String(result[0]);
-               if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength(rx.lastIndex), fullUnicode);
-             }
+         this._initBody(body);
 
-             var accumulatedResult = '';
-             var nextSourcePosition = 0;
-             for (var i = 0; i < results.length; i++) {
-               result = results[i];
+         if (this.method === 'GET' || this.method === 'HEAD') {
+           if (options.cache === 'no-store' || options.cache === 'no-cache') {
+             // Search for a '_' parameter in the query string
+             var reParamSearch = /([?&])_=[^&]*/;
 
-               var matched = String(result[0]);
-               var position = max$2(min$4(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;
-               }
+             if (reParamSearch.test(this.url)) {
+               // If it already exists then set the value with the current time
+               this.url = this.url.replace(reParamSearch, '$1_=' + new Date().getTime());
+             } else {
+               // Otherwise add a new '_' parameter to the end with the current time
+               var reQueryString = /\?/;
+               this.url += (reQueryString.test(this.url) ? '&' : '?') + '_=' + new Date().getTime();
              }
-             return accumulatedResult + S.slice(nextSourcePosition);
            }
-         ];
-       });
-
-       var MATCH = wellKnownSymbol('match');
+         }
+       }
 
-       // `IsRegExp` abstract operation
-       // https://tc39.es/ecma262/#sec-isregexp
-       var isRegexp = function (it) {
-         var isRegExp;
-         return isObject(it) && ((isRegExp = it[MATCH]) !== undefined ? !!isRegExp : classofRaw(it) == 'RegExp');
+       Request.prototype.clone = function () {
+         return new Request(this, {
+           body: this._bodyInit
+         });
        };
 
-       var arrayPush = [].push;
-       var min$5 = Math.min;
-       var MAX_UINT32 = 0xFFFFFFFF;
+       function decode(body) {
+         var form = new FormData();
+         body.trim().split('&').forEach(function (bytes) {
+           if (bytes) {
+             var split = bytes.split('=');
+             var name = split.shift().replace(/\+/g, ' ');
+             var value = split.join('=').replace(/\+/g, ' ');
+             form.append(decodeURIComponent(name), decodeURIComponent(value));
+           }
+         });
+         return form;
+       }
 
-       // babel-minify transpiles RegExp('x', 'y') -> /x/y and it causes SyntaxError
-       var SUPPORTS_Y = !fails(function () { return !RegExp(MAX_UINT32, 'y'); });
+       function parseHeaders(rawHeaders) {
+         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
 
-       // @@split logic
-       fixRegexpWellKnownSymbolLogic('split', 2, 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-assertion-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 = 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 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
 
-         return [
-           // `String.prototype.split` method
-           // https://tc39.es/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.es/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;
+         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();
 
-             var rx = anObject(regexp);
-             var S = String(this);
-             var C = speciesConstructor(rx, RegExp);
+           if (key) {
+             var value = parts.join(':').trim();
+             headers.append(key, value);
+           }
+         });
+         return headers;
+       }
 
-             var unicodeMatching = rx.unicode;
-             var flags = (rx.ignoreCase ? 'i' : '') +
-                         (rx.multiline ? 'm' : '') +
-                         (rx.unicode ? 'u' : '') +
-                         (SUPPORTS_Y ? 'y' : 'g');
+       Body.call(Request.prototype);
+       function Response(bodyInit, options) {
+         if (!(this instanceof Response)) {
+           throw new TypeError('Please use the "new" operator, this DOM object constructor cannot be called as a function.');
+         }
 
-             // ^(? + 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$5(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);
+         if (!options) {
+           options = {};
+         }
 
-       // a string of all valid unicode whitespaces
-       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';
+         this.type = 'default';
+         this.status = options.status === undefined ? 200 : options.status;
+         this.ok = this.status >= 200 && this.status < 300;
+         this.statusText = options.statusText === undefined ? '' : '' + options.statusText;
+         this.headers = new Headers(options.headers);
+         this.url = options.url || '';
 
-       var whitespace = '[' + whitespaces + ']';
-       var ltrim = RegExp('^' + whitespace + whitespace + '*');
-       var rtrim = RegExp(whitespace + whitespace + '*$');
+         this._initBody(bodyInit);
+       }
+       Body.call(Response.prototype);
 
-       // `String.prototype.{ trim, trimStart, trimEnd, trimLeft, trimRight }` methods implementation
-       var createMethod$4 = function (TYPE) {
-         return function ($this) {
-           var string = String(requireObjectCoercible($this));
-           if (TYPE & 1) string = string.replace(ltrim, '');
-           if (TYPE & 2) string = string.replace(rtrim, '');
-           return string;
-         };
+       Response.prototype.clone = function () {
+         return new Response(this._bodyInit, {
+           status: this.status,
+           statusText: this.statusText,
+           headers: new Headers(this.headers),
+           url: this.url
+         });
        };
 
-       var stringTrim = {
-         // `String.prototype.{ trimLeft, trimStart }` methods
-         // https://tc39.es/ecma262/#sec-string.prototype.trimstart
-         start: createMethod$4(1),
-         // `String.prototype.{ trimRight, trimEnd }` methods
-         // https://tc39.es/ecma262/#sec-string.prototype.trimend
-         end: createMethod$4(2),
-         // `String.prototype.trim` method
-         // https://tc39.es/ecma262/#sec-string.prototype.trim
-         trim: createMethod$4(3)
+       Response.error = function () {
+         var response = new Response(null, {
+           status: 0,
+           statusText: ''
+         });
+         response.type = 'error';
+         return response;
        };
 
-       var non = '\u200B\u0085\u180E';
+       var redirectStatuses = [301, 302, 303, 307, 308];
 
-       // 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;
+       Response.redirect = function (url, status) {
+         if (redirectStatuses.indexOf(status) === -1) {
+           throw new RangeError('Invalid status code');
+         }
+
+         return new Response(null, {
+           status: status,
+           headers: {
+             location: url
+           }
          });
        };
 
-       var $trim = stringTrim.trim;
+       var DOMException$1 = global$k.DOMException;
+
+       try {
+         new DOMException$1();
+       } catch (err) {
+         DOMException$1 = function DOMException(message, name) {
+           this.message = message;
+           this.name = name;
+           var error = Error(message);
+           this.stack = error.stack;
+         };
 
+         DOMException$1.prototype = Object.create(Error.prototype);
+         DOMException$1.prototype.constructor = DOMException$1;
+       }
 
-       // `String.prototype.trim` method
-       // https://tc39.es/ecma262/#sec-string.prototype.trim
-       _export({ target: 'String', proto: true, forced: stringTrimForced('trim') }, {
-         trim: function trim() {
-           return $trim(this);
-         }
-       });
+       function fetch$1(input, init) {
+         return new Promise(function (resolve, reject) {
+           var request = new Request(input, init);
 
-       var defineProperty$6 = objectDefineProperty.f;
+           if (request.signal && request.signal.aborted) {
+             return reject(new DOMException$1('Aborted', 'AbortError'));
+           }
 
-       var FunctionPrototype = Function.prototype;
-       var FunctionPrototypeToString = FunctionPrototype.toString;
-       var nameRE = /^\s*function ([^ (]*)/;
-       var NAME$1 = 'name';
+           var xhr = new XMLHttpRequest();
 
-       // Function instances `.name` property
-       // https://tc39.es/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 '';
-             }
+           function abortXhr() {
+             xhr.abort();
            }
-         });
-       }
 
-       // `Object.create` method
-       // https://tc39.es/ecma262/#sec-object.create
-       _export({ target: 'Object', stat: true, sham: !descriptors }, {
-         create: objectCreate
-       });
+           xhr.onload = function () {
+             var options = {
+               status: xhr.status,
+               statusText: xhr.statusText,
+               headers: parseHeaders(xhr.getAllResponseHeaders() || '')
+             };
+             options.url = 'responseURL' in xhr ? xhr.responseURL : options.headers.get('X-Request-URL');
+             var body = 'response' in xhr ? xhr.response : xhr.responseText;
+             setTimeout(function () {
+               resolve(new Response(body, options));
+             }, 0);
+           };
 
-       var slice = [].slice;
-       var MSIE = /MSIE .\./.test(engineUserAgent); // <- dirty ie9- check
+           xhr.onerror = function () {
+             setTimeout(function () {
+               reject(new TypeError('Network request failed'));
+             }, 0);
+           };
 
-       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 -- spec requirement
-             (typeof handler == 'function' ? handler : Function(handler)).apply(this, args);
-           } : handler, timeout);
-         };
-       };
+           xhr.ontimeout = function () {
+             setTimeout(function () {
+               reject(new TypeError('Network request failed'));
+             }, 0);
+           };
 
-       // 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)
-       });
+           xhr.onabort = function () {
+             setTimeout(function () {
+               reject(new DOMException$1('Aborted', 'AbortError'));
+             }, 0);
+           };
 
-       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$1 && function () {
-           try {
-             new Blob();
-             return true;
-           } catch (e) {
-             return false;
+           function fixUrl(url) {
+             try {
+               return url === '' && global$k.location.href ? global$k.location.href : url;
+             } catch (e) {
+               return url;
+             }
            }
-         }(),
-         formData: 'FormData' in global$1,
-         arrayBuffer: 'ArrayBuffer' in global$1
-       };
 
-       function isDataView(obj) {
-         return obj && DataView.prototype.isPrototypeOf(obj);
-       }
+           xhr.open(request.method, fixUrl(request.url), true);
 
-       if (support.arrayBuffer) {
-         var viewClasses = ['[object Int8Array]', '[object Uint8Array]', '[object Uint8ClampedArray]', '[object Int16Array]', '[object Uint16Array]', '[object Int32Array]', '[object Uint32Array]', '[object Float32Array]', '[object Float64Array]'];
+           if (request.credentials === 'include') {
+             xhr.withCredentials = true;
+           } else if (request.credentials === 'omit') {
+             xhr.withCredentials = false;
+           }
 
-         var isArrayBufferView = ArrayBuffer.isView || function (obj) {
-           return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1;
-         };
-       }
+           if ('responseType' in xhr) {
+             if (support.blob) {
+               xhr.responseType = 'blob';
+             } else if (support.arrayBuffer && request.headers.get('Content-Type') && request.headers.get('Content-Type').indexOf('application/octet-stream') !== -1) {
+               xhr.responseType = 'arraybuffer';
+             }
+           }
 
-       function normalizeName(name) {
-         if (typeof name !== 'string') {
-           name = String(name);
-         }
+           if (init && _typeof(init.headers) === 'object' && !(init.headers instanceof Headers)) {
+             Object.getOwnPropertyNames(init.headers).forEach(function (name) {
+               xhr.setRequestHeader(name, normalizeValue(init.headers[name]));
+             });
+           } else {
+             request.headers.forEach(function (value, name) {
+               xhr.setRequestHeader(name, value);
+             });
+           }
 
-         if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
-           throw new TypeError('Invalid character in header field name: "' + name + '"');
-         }
+           if (request.signal) {
+             request.signal.addEventListener('abort', abortXhr);
 
-         return name.toLowerCase();
+             xhr.onreadystatechange = function () {
+               // DONE (success or failure)
+               if (xhr.readyState === 4) {
+                 request.signal.removeEventListener('abort', abortXhr);
+               }
+             };
+           }
+
+           xhr.send(typeof request._bodyInit === 'undefined' ? null : request._bodyInit);
+         });
        }
+       fetch$1.polyfill = true;
 
-       function normalizeValue(value) {
-         if (typeof value !== 'string') {
-           value = String(value);
-         }
+       if (!global$k.fetch) {
+         global$k.fetch = fetch$1;
+         global$k.Headers = Headers;
+         global$k.Request = Request;
+         global$k.Response = Response;
+       }
 
-         return value;
-       } // Build a destructive iterator for the value list
+       var $$T = _export;
+       var DESCRIPTORS$9 = descriptors;
+       var defineProperty$5 = objectDefineProperty.f;
 
+       // `Object.defineProperty` method
+       // https://tc39.es/ecma262/#sec-object.defineproperty
+       // eslint-disable-next-line es/no-object-defineproperty -- safe
+       $$T({ target: 'Object', stat: true, forced: Object.defineProperty !== defineProperty$5, sham: !DESCRIPTORS$9 }, {
+         defineProperty: defineProperty$5
+       });
 
-       function iteratorFor(items) {
-         var iterator = {
-           next: function next() {
-             var value = items.shift();
-             return {
-               done: value === undefined,
-               value: value
-             };
-           }
-         };
+       var $$S = _export;
+       var setPrototypeOf = objectSetPrototypeOf;
 
-         if (support.iterable) {
-           iterator[Symbol.iterator] = function () {
-             return iterator;
-           };
-         }
+       // `Object.setPrototypeOf` method
+       // https://tc39.es/ecma262/#sec-object.setprototypeof
+       $$S({ target: 'Object', stat: true }, {
+         setPrototypeOf: setPrototypeOf
+       });
 
-         return iterator;
-       }
+       var $$R = _export;
+       var fails$n = fails$V;
+       var toObject$8 = toObject$i;
+       var nativeGetPrototypeOf = objectGetPrototypeOf;
+       var CORRECT_PROTOTYPE_GETTER = correctPrototypeGetter;
 
-       function Headers$1(headers) {
-         this.map = {};
+       var FAILS_ON_PRIMITIVES$4 = fails$n(function () { nativeGetPrototypeOf(1); });
 
-         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);
+       // `Object.getPrototypeOf` method
+       // 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 nativeGetPrototypeOf(toObject$8(it));
          }
-       }
+       });
 
-       Headers$1.prototype.append = function (name, value) {
-         name = normalizeName(name);
-         value = normalizeValue(value);
-         var oldValue = this.map[name];
-         this.map[name] = oldValue ? oldValue + ', ' + value : value;
-       };
+       var global$j = global$1o;
+       var uncurryThis$m = functionUncurryThis;
+       var aCallable$2 = aCallable$a;
+       var isObject$b = isObject$s;
+       var hasOwn$5 = hasOwnProperty_1;
+       var arraySlice$2 = arraySlice$b;
+       var NATIVE_BIND = functionBindNative;
+
+       var Function$1 = global$j.Function;
+       var concat$1 = uncurryThis$m([].concat);
+       var join$3 = uncurryThis$m([].join);
+       var factories = {};
 
-       Headers$1.prototype['delete'] = function (name) {
-         delete this.map[normalizeName(name)];
+       var construct = function (C, argsLength, args) {
+         if (!hasOwn$5(factories, argsLength)) {
+           for (var list = [], i = 0; i < argsLength; i++) list[i] = 'a[' + i + ']';
+           factories[argsLength] = Function$1('C,a', 'return new C(' + join$3(list, ',') + ')');
+         } return factories[argsLength](C, args);
        };
 
-       Headers$1.prototype.get = function (name) {
-         name = normalizeName(name);
-         return this.has(name) ? this.map[name] : null;
+       // `Function.prototype.bind` method implementation
+       // https://tc39.es/ecma262/#sec-function.prototype.bind
+       var functionBind = NATIVE_BIND ? 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 = concat$1(partArgs, arraySlice$2(arguments));
+           return this instanceof boundFunction ? construct(F, args.length, args) : F.apply(that, args);
+         };
+         if (isObject$b(Prototype)) boundFunction.prototype = Prototype;
+         return boundFunction;
        };
 
-       Headers$1.prototype.has = function (name) {
-         return this.map.hasOwnProperty(normalizeName(name));
-       };
+       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$V;
+
+       var nativeConstruct = getBuiltIn$1('Reflect', 'construct');
+       var ObjectPrototype = Object.prototype;
+       var push$4 = [].push;
 
-       Headers$1.prototype.set = function (name, value) {
-         this.map[normalizeName(name)] = normalizeValue(value);
-       };
+       // `Reflect.construct` method
+       // https://tc39.es/ecma262/#sec-reflect.construct
+       // MS Edge supports only 2 arguments and argumentsList argument is optional
+       // FF Nightly sets third argument as `new.target`, but does not create `this` from it
+       var NEW_TARGET_BUG = fails$m(function () {
+         function F() { /* empty */ }
+         return !(nativeConstruct(function () { /* empty */ }, [], F) instanceof F);
+       });
 
-       Headers$1.prototype.forEach = function (callback, thisArg) {
-         for (var name in this.map) {
-           if (this.map.hasOwnProperty(name)) {
-             callback.call(thisArg, this.map[name], name, this);
+       var ARGS_BUG = !fails$m(function () {
+         nativeConstruct(function () { /* empty */ });
+       });
+
+       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 */) {
+           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
+             switch (args.length) {
+               case 0: return new Target();
+               case 1: return new Target(args[0]);
+               case 2: return new Target(args[0], args[1]);
+               case 3: return new Target(args[0], args[1], args[2]);
+               case 4: return new Target(args[0], args[1], args[2], args[3]);
+             }
+             // w/o altered newTarget, lot of arguments case
+             var $args = [null];
+             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 = create$4(isObject$a(proto) ? proto : ObjectPrototype);
+           var result = apply(Target, instance, args);
+           return isObject$a(result) ? result : instance;
          }
-       };
+       });
 
-       Headers$1.prototype.keys = function () {
-         var items = [];
-         this.forEach(function (value, name) {
-           items.push(name);
-         });
-         return iteratorFor(items);
-       };
+       var hasOwn$4 = hasOwnProperty_1;
 
-       Headers$1.prototype.values = function () {
-         var items = [];
-         this.forEach(function (value) {
-           items.push(value);
-         });
-         return iteratorFor(items);
+       var isDataDescriptor$1 = function (descriptor) {
+         return descriptor !== undefined && (hasOwn$4(descriptor, 'value') || hasOwn$4(descriptor, 'writable'));
        };
 
-       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;
-       }
+       var $$P = _export;
+       var call$5 = functionCall;
+       var isObject$9 = isObject$s;
+       var anObject$3 = anObject$n;
+       var isDataDescriptor = isDataDescriptor$1;
+       var getOwnPropertyDescriptorModule = objectGetOwnPropertyDescriptor;
+       var getPrototypeOf = objectGetPrototypeOf;
 
-       function readBlobAsText(blob) {
-         var reader = new FileReader();
-         var promise = fileReaderReady(reader);
-         reader.readAsText(blob);
-         return promise;
+       // `Reflect.get` method
+       // 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$3(target) === receiver) return target[propertyKey];
+         descriptor = getOwnPropertyDescriptorModule.f(target, propertyKey);
+         if (descriptor) return isDataDescriptor(descriptor)
+           ? descriptor.value
+           : descriptor.get === undefined ? undefined : call$5(descriptor.get, receiver);
+         if (isObject$9(prototype = getPrototypeOf(target))) return get$3(prototype, propertyKey, receiver);
        }
 
-       function readArrayBufferAsText(buf) {
-         var view = new Uint8Array(buf);
-         var chars = new Array(view.length);
+       $$P({ target: 'Reflect', stat: true }, {
+         get: get$3
+       });
 
-         for (var i = 0; i < view.length; i++) {
-           chars[i] = String.fromCharCode(view[i]);
-         }
+       var $$O = _export;
+       var fails$l = fails$V;
+       var toIndexedObject$1 = toIndexedObject$d;
+       var nativeGetOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+       var DESCRIPTORS$8 = descriptors;
 
-         return chars.join('');
-       }
+       var FAILS_ON_PRIMITIVES$3 = fails$l(function () { nativeGetOwnPropertyDescriptor(1); });
+       var FORCED$b = !DESCRIPTORS$8 || FAILS_ON_PRIMITIVES$3;
 
-       function bufferClone(buf) {
-         if (buf.slice) {
-           return buf.slice(0);
-         } else {
-           var view = new Uint8Array(buf.byteLength);
-           view.set(new Uint8Array(buf));
-           return view.buffer;
+       // `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 Body() {
-         this.bodyUsed = false;
+       var $$N = _export;
+       var global$i = global$1o;
+       var toAbsoluteIndex$1 = toAbsoluteIndex$9;
+       var toIntegerOrInfinity$2 = toIntegerOrInfinity$b;
+       var lengthOfArrayLike$5 = lengthOfArrayLike$i;
+       var toObject$7 = toObject$i;
+       var arraySpeciesCreate$2 = arraySpeciesCreate$4;
+       var createProperty$2 = createProperty$5;
+       var arrayMethodHasSpeciesSupport$2 = arrayMethodHasSpeciesSupport$5;
 
-         this._initBody = function (body) {
-           /*
-             fetch-mock wraps the Response object in an ES6 Proxy to
-             provide useful test harness features such as flush. However, on
-             ES5 browsers without fetch or Proxy support pollyfills must be used;
-             the proxy-pollyfill is unable to proxy an attribute unless it exists
-             on the object before the Proxy is created. This change ensures
-             Response.bodyUsed exists on the instance, while maintaining the
-             semantic of setting Request.bodyUsed in the constructor before
-             _initBody is called.
-           */
-           this.bodyUsed = this.bodyUsed;
-           this._bodyInit = body;
+       var HAS_SPECIES_SUPPORT$1 = arrayMethodHasSpeciesSupport$2('splice');
 
-           if (!body) {
-             this._bodyText = '';
-           } else if (typeof body === 'string') {
-             this._bodyText = body;
-           } else if (support.blob && Blob.prototype.isPrototypeOf(body)) {
-             this._bodyBlob = body;
-           } else if (support.formData && FormData.prototype.isPrototypeOf(body)) {
-             this._bodyFormData = body;
-           } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
-             this._bodyText = body.toString();
-           } else if (support.arrayBuffer && support.blob && isDataView(body)) {
-             this._bodyArrayBuffer = bufferClone(body.buffer); // IE 10-11 can't handle a DataView body.
+       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';
 
-             this._bodyInit = new Blob([this._bodyArrayBuffer]);
-           } else if (support.arrayBuffer && (ArrayBuffer.prototype.isPrototypeOf(body) || isArrayBufferView(body))) {
-             this._bodyArrayBuffer = bufferClone(body);
+       // `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 {
-             this._bodyText = body = Object.prototype.toString.call(body);
+             insertCount = argumentsLength - 2;
+             actualDeleteCount = min$3(max$1(toIntegerOrInfinity$2(deleteCount), 0), len - actualStart);
            }
-
-           if (!this.headers.get('content-type')) {
-             if (typeof body === 'string') {
-               this.headers.set('content-type', 'text/plain;charset=UTF-8');
-             } else if (this._bodyBlob && this._bodyBlob.type) {
-               this.headers.set('content-type', this._bodyBlob.type);
-             } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
-               this.headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
+           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;
+         }
+       });
 
-         if (support.blob) {
-           this.blob = function () {
-             var rejected = consumed(this);
+       var defineWellKnownSymbol$1 = defineWellKnownSymbol$4;
 
-             if (rejected) {
-               return rejected;
-             }
+       // `Symbol.toStringTag` well-known symbol
+       // https://tc39.es/ecma262/#sec-symbol.tostringtag
+       defineWellKnownSymbol$1('toStringTag');
 
-             if (this._bodyBlob) {
-               return Promise.resolve(this._bodyBlob);
-             } else if (this._bodyArrayBuffer) {
-               return Promise.resolve(new Blob([this._bodyArrayBuffer]));
-             } else if (this._bodyFormData) {
-               throw new Error('could not read FormData body as blob');
-             } else {
-               return Promise.resolve(new Blob([this._bodyText]));
-             }
-           };
+       var global$h = global$1o;
+       var setToStringTag$3 = setToStringTag$a;
 
-           this.arrayBuffer = function () {
-             if (this._bodyArrayBuffer) {
-               var isConsumed = consumed(this);
+       // JSON[@@toStringTag] property
+       // https://tc39.es/ecma262/#sec-json-@@tostringtag
+       setToStringTag$3(global$h.JSON, 'JSON', true);
 
-               if (isConsumed) {
-                 return isConsumed;
-               }
+       var setToStringTag$2 = setToStringTag$a;
 
-               if (ArrayBuffer.isView(this._bodyArrayBuffer)) {
-                 return Promise.resolve(this._bodyArrayBuffer.buffer.slice(this._bodyArrayBuffer.byteOffset, this._bodyArrayBuffer.byteOffset + this._bodyArrayBuffer.byteLength));
-               } else {
-                 return Promise.resolve(this._bodyArrayBuffer);
-               }
-             } else {
-               return this.blob().then(readBlobAsArrayBuffer);
-             }
-           };
-         }
+       // Math[@@toStringTag] property
+       // https://tc39.es/ecma262/#sec-math-@@tostringtag
+       setToStringTag$2(Math, 'Math', true);
 
-         this.text = function () {
-           var rejected = consumed(this);
+       (function (factory) {
+         factory();
+       })(function () {
 
-           if (rejected) {
-             return rejected;
+         function _classCallCheck(instance, Constructor) {
+           if (!(instance instanceof Constructor)) {
+             throw new TypeError("Cannot call a class as a function");
            }
+         }
 
-           if (this._bodyBlob) {
-             return readBlobAsText(this._bodyBlob);
-           } else if (this._bodyArrayBuffer) {
-             return Promise.resolve(readArrayBufferAsText(this._bodyArrayBuffer));
-           } else if (this._bodyFormData) {
-             throw new Error('could not read FormData body as text');
-           } else {
-             return Promise.resolve(this._bodyText);
+         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);
            }
-         };
-
-         if (support.formData) {
-           this.formData = function () {
-             return this.text().then(decode);
-           };
          }
 
-         this.json = function () {
-           return this.text().then(JSON.parse);
-         };
+         function _createClass(Constructor, protoProps, staticProps) {
+           if (protoProps) _defineProperties(Constructor.prototype, protoProps);
+           if (staticProps) _defineProperties(Constructor, staticProps);
+           return Constructor;
+         }
 
-         return this;
-       } // HTTP methods whose capitalization should be normalized
+         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 (superClass) _setPrototypeOf(subClass, superClass);
+         }
 
-       var methods = ['DELETE', 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT'];
+         function _getPrototypeOf(o) {
+           _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
+             return o.__proto__ || Object.getPrototypeOf(o);
+           };
+           return _getPrototypeOf(o);
+         }
 
-       function normalizeMethod(method) {
-         var upcased = method.toUpperCase();
-         return methods.indexOf(upcased) > -1 ? upcased : method;
-       }
+         function _setPrototypeOf(o, p) {
+           _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
+             o.__proto__ = p;
+             return o;
+           };
 
-       function Request(input, options) {
-         if (!(this instanceof Request)) {
-           throw new TypeError('Please use the "new" operator, this DOM object constructor cannot be called as a function.');
+           return _setPrototypeOf(o, p);
          }
 
-         options = options || {};
-         var body = options.body;
+         function _isNativeReflectConstruct() {
+           if (typeof Reflect === "undefined" || !Reflect.construct) return false;
+           if (Reflect.construct.sham) return false;
+           if (typeof Proxy === "function") return true;
 
-         if (input instanceof Request) {
-           if (input.bodyUsed) {
-             throw new TypeError('Already read');
+           try {
+             Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
+             return true;
+           } catch (e) {
+             return false;
            }
+         }
 
-           this.url = input.url;
-           this.credentials = input.credentials;
-
-           if (!options.headers) {
-             this.headers = new Headers$1(input.headers);
+         function _assertThisInitialized(self) {
+           if (self === void 0) {
+             throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
            }
 
-           this.method = input.method;
-           this.mode = input.mode;
-           this.signal = input.signal;
-
-           if (!body && input._bodyInit != null) {
-             body = input._bodyInit;
-             input.bodyUsed = true;
-           }
-         } else {
-           this.url = String(input);
+           return self;
          }
 
-         this.credentials = options.credentials || this.credentials || 'same-origin';
+         function _possibleConstructorReturn(self, call) {
+           if (call && (_typeof(call) === "object" || typeof call === "function")) {
+             return call;
+           }
 
-         if (options.headers || !this.headers) {
-           this.headers = new Headers$1(options.headers);
+           return _assertThisInitialized(self);
          }
 
-         this.method = normalizeMethod(options.method || this.method || 'GET');
-         this.mode = options.mode || this.mode || null;
-         this.signal = options.signal || this.signal;
-         this.referrer = null;
-
-         if ((this.method === 'GET' || this.method === 'HEAD') && body) {
-           throw new TypeError('Body not allowed for GET or HEAD requests');
-         }
+         function _createSuper(Derived) {
+           var hasNativeReflectConstruct = _isNativeReflectConstruct();
 
-         this._initBody(body);
+           return function _createSuperInternal() {
+             var Super = _getPrototypeOf(Derived),
+                 result;
 
-         if (this.method === 'GET' || this.method === 'HEAD') {
-           if (options.cache === 'no-store' || options.cache === 'no-cache') {
-             // Search for a '_' parameter in the query string
-             var reParamSearch = /([?&])_=[^&]*/;
+             if (hasNativeReflectConstruct) {
+               var NewTarget = _getPrototypeOf(this).constructor;
 
-             if (reParamSearch.test(this.url)) {
-               // If it already exists then set the value with the current time
-               this.url = this.url.replace(reParamSearch, '$1_=' + new Date().getTime());
+               result = Reflect.construct(Super, arguments, NewTarget);
              } else {
-               // Otherwise add a new '_' parameter to the end with the current time
-               var reQueryString = /\?/;
-               this.url += (reQueryString.test(this.url) ? '&' : '?') + '_=' + new Date().getTime();
+               result = Super.apply(this, arguments);
              }
-           }
-         }
-       }
 
-       Request.prototype.clone = function () {
-         return new Request(this, {
-           body: this._bodyInit
-         });
-       };
+             return _possibleConstructorReturn(this, result);
+           };
+         }
 
-       function decode(body) {
-         var form = new FormData();
-         body.trim().split('&').forEach(function (bytes) {
-           if (bytes) {
-             var split = bytes.split('=');
-             var name = split.shift().replace(/\+/g, ' ');
-             var value = split.join('=').replace(/\+/g, ' ');
-             form.append(decodeURIComponent(name), decodeURIComponent(value));
+         function _superPropBase(object, property) {
+           while (!Object.prototype.hasOwnProperty.call(object, property)) {
+             object = _getPrototypeOf(object);
+             if (object === null) break;
            }
-         });
-         return form;
-       }
 
-       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
-         // https://tools.ietf.org/html/rfc7230#section-3.2
+           return object;
+         }
 
-         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
+         function _get(target, property, receiver) {
+           if (typeof Reflect !== "undefined" && Reflect.get) {
+             _get = Reflect.get;
+           } else {
+             _get = function _get(target, property, receiver) {
+               var base = _superPropBase(target, property);
 
-         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();
+               if (!base) return;
+               var desc = Object.getOwnPropertyDescriptor(base, property);
 
-           if (key) {
-             var value = parts.join(':').trim();
-             headers.append(key, value);
+               if (desc.get) {
+                 return desc.get.call(receiver);
+               }
+
+               return desc.value;
+             };
            }
-         });
-         return headers;
-       }
 
-       Body.call(Request.prototype);
-       function Response(bodyInit, options) {
-         if (!(this instanceof Response)) {
-           throw new TypeError('Please use the "new" operator, this DOM object constructor cannot be called as a function.');
+           return _get(target, property, receiver || target);
          }
 
-         if (!options) {
-           options = {};
-         }
+         var Emitter = /*#__PURE__*/function () {
+           function Emitter() {
+             _classCallCheck(this, Emitter);
 
-         this.type = 'default';
-         this.status = options.status === undefined ? 200 : options.status;
-         this.ok = this.status >= 200 && this.status < 300;
-         this.statusText = options.statusText === undefined ? '' : '' + options.statusText;
-         this.headers = new Headers$1(options.headers);
-         this.url = options.url || '';
+             Object.defineProperty(this, 'listeners', {
+               value: {},
+               writable: true,
+               configurable: true
+             });
+           }
 
-         this._initBody(bodyInit);
-       }
-       Body.call(Response.prototype);
+           _createClass(Emitter, [{
+             key: "addEventListener",
+             value: function addEventListener(type, callback, options) {
+               if (!(type in this.listeners)) {
+                 this.listeners[type] = [];
+               }
 
-       Response.prototype.clone = function () {
-         return new Response(this._bodyInit, {
-           status: this.status,
-           statusText: this.statusText,
-           headers: new Headers$1(this.headers),
-           url: this.url
-         });
-       };
+               this.listeners[type].push({
+                 callback: callback,
+                 options: options
+               });
+             }
+           }, {
+             key: "removeEventListener",
+             value: function removeEventListener(type, callback) {
+               if (!(type in this.listeners)) {
+                 return;
+               }
 
-       Response.error = function () {
-         var response = new Response(null, {
-           status: 0,
-           statusText: ''
-         });
-         response.type = 'error';
-         return response;
-       };
+               var stack = this.listeners[type];
 
-       var redirectStatuses = [301, 302, 303, 307, 308];
+               for (var i = 0, l = stack.length; i < l; i++) {
+                 if (stack[i].callback === callback) {
+                   stack.splice(i, 1);
+                   return;
+                 }
+               }
+             }
+           }, {
+             key: "dispatchEvent",
+             value: function dispatchEvent(event) {
+               if (!(event.type in this.listeners)) {
+                 return;
+               }
 
-       Response.redirect = function (url, status) {
-         if (redirectStatuses.indexOf(status) === -1) {
-           throw new RangeError('Invalid status code');
-         }
+               var stack = this.listeners[event.type];
+               var stackToCall = stack.slice();
 
-         return new Response(null, {
-           status: status,
-           headers: {
-             location: url
-           }
-         });
-       };
+               for (var i = 0, l = stackToCall.length; i < l; i++) {
+                 var listener = stackToCall[i];
 
-       var DOMException$1 = global$1.DOMException;
+                 try {
+                   listener.callback.call(this, event);
+                 } catch (e) {
+                   Promise.resolve().then(function () {
+                     throw e;
+                   });
+                 }
 
-       try {
-         new DOMException$1();
-       } catch (err) {
-         DOMException$1 = function DOMException(message, name) {
-           this.message = message;
-           this.name = name;
-           var error = Error(message);
-           this.stack = error.stack;
-         };
+                 if (listener.options && listener.options.once) {
+                   this.removeEventListener(event.type, listener.callback);
+                 }
+               }
 
-         DOMException$1.prototype = Object.create(Error.prototype);
-         DOMException$1.prototype.constructor = DOMException$1;
-       }
+               return !event.defaultPrevented;
+             }
+           }]);
 
-       function fetch$1(input, init) {
-         return new Promise(function (resolve, reject) {
-           var request = new Request(input, init);
+           return Emitter;
+         }();
 
-           if (request.signal && request.signal.aborted) {
-             return reject(new DOMException$1('Aborted', 'AbortError'));
-           }
+         var AbortSignal = /*#__PURE__*/function (_Emitter) {
+           _inherits(AbortSignal, _Emitter);
 
-           var xhr = new XMLHttpRequest();
-
-           function abortXhr() {
-             xhr.abort();
-           }
-
-           xhr.onload = function () {
-             var options = {
-               status: xhr.status,
-               statusText: xhr.statusText,
-               headers: parseHeaders(xhr.getAllResponseHeaders() || '')
-             };
-             options.url = 'responseURL' in xhr ? xhr.responseURL : options.headers.get('X-Request-URL');
-             var body = 'response' in xhr ? xhr.response : xhr.responseText;
-             setTimeout(function () {
-               resolve(new Response(body, options));
-             }, 0);
-           };
-
-           xhr.onerror = function () {
-             setTimeout(function () {
-               reject(new TypeError('Network request failed'));
-             }, 0);
-           };
-
-           xhr.ontimeout = function () {
-             setTimeout(function () {
-               reject(new TypeError('Network request failed'));
-             }, 0);
-           };
-
-           xhr.onabort = function () {
-             setTimeout(function () {
-               reject(new DOMException$1('Aborted', 'AbortError'));
-             }, 0);
-           };
-
-           function fixUrl(url) {
-             try {
-               return url === '' && global$1.location.href ? global$1.location.href : url;
-             } catch (e) {
-               return url;
-             }
-           }
-
-           xhr.open(request.method, fixUrl(request.url), true);
-
-           if (request.credentials === 'include') {
-             xhr.withCredentials = true;
-           } else if (request.credentials === 'omit') {
-             xhr.withCredentials = false;
-           }
-
-           if ('responseType' in xhr) {
-             if (support.blob) {
-               xhr.responseType = 'blob';
-             } else if (support.arrayBuffer && request.headers.get('Content-Type') && request.headers.get('Content-Type').indexOf('application/octet-stream') !== -1) {
-               xhr.responseType = 'arraybuffer';
-             }
-           }
-
-           if (init && _typeof(init.headers) === 'object' && !(init.headers instanceof Headers$1)) {
-             Object.getOwnPropertyNames(init.headers).forEach(function (name) {
-               xhr.setRequestHeader(name, normalizeValue(init.headers[name]));
-             });
-           } else {
-             request.headers.forEach(function (value, name) {
-               xhr.setRequestHeader(name, value);
-             });
-           }
-
-           if (request.signal) {
-             request.signal.addEventListener('abort', abortXhr);
-
-             xhr.onreadystatechange = function () {
-               // DONE (success or failure)
-               if (xhr.readyState === 4) {
-                 request.signal.removeEventListener('abort', abortXhr);
-               }
-             };
-           }
-
-           xhr.send(typeof request._bodyInit === 'undefined' ? null : request._bodyInit);
-         });
-       }
-       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;
-       }
-
-       // `Object.defineProperty` method
-       // https://tc39.es/ecma262/#sec-object.defineproperty
-       _export({ target: 'Object', stat: true, forced: !descriptors, sham: !descriptors }, {
-         defineProperty: objectDefineProperty.f
-       });
-
-       // `Object.setPrototypeOf` method
-       // https://tc39.es/ecma262/#sec-object.setprototypeof
-       _export({ target: 'Object', stat: true }, {
-         setPrototypeOf: objectSetPrototypeOf
-       });
-
-       var FAILS_ON_PRIMITIVES$1 = fails(function () { objectGetPrototypeOf(1); });
-
-       // `Object.getPrototypeOf` method
-       // https://tc39.es/ecma262/#sec-object.getprototypeof
-       _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$1, sham: !correctPrototypeGetter }, {
-         getPrototypeOf: function getPrototypeOf(it) {
-           return objectGetPrototypeOf(toObject(it));
-         }
-       });
-
-       var slice$1 = [].slice;
-       var factories = {};
-
-       var construct = function (C, argsLength, args) {
-         if (!(argsLength in factories)) {
-           for (var list = [], i = 0; i < argsLength; i++) list[i] = 'a[' + i + ']';
-           // eslint-disable-next-line no-new-func -- we have no proper alternatives, IE8- only
-           factories[argsLength] = Function('C,a', 'return new C(' + list.join(',') + ')');
-         } return factories[argsLength](C, args);
-       };
-
-       // `Function.prototype.bind` method implementation
-       // https://tc39.es/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);
-         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);
-         };
-         if (isObject(fn.prototype)) boundFunction.prototype = fn.prototype;
-         return boundFunction;
-       };
-
-       var nativeConstruct = getBuiltIn('Reflect', 'construct');
-
-       // `Reflect.construct` method
-       // 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 () {
-         function F() { /* empty */ }
-         return !(nativeConstruct(function () { /* empty */ }, [], F) instanceof F);
-       });
-       var ARGS_BUG = !fails(function () {
-         nativeConstruct(function () { /* empty */ });
-       });
-       var FORCED$5 = NEW_TARGET_BUG || ARGS_BUG;
-
-       _export({ target: 'Reflect', stat: true, forced: FORCED$5, sham: FORCED$5 }, {
-         construct: function construct(Target, args /* , newTarget */) {
-           aFunction$1(Target);
-           anObject(args);
-           var newTarget = arguments.length < 3 ? Target : aFunction$1(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
-             switch (args.length) {
-               case 0: return new Target();
-               case 1: return new Target(args[0]);
-               case 2: return new Target(args[0], args[1]);
-               case 3: return new Target(args[0], args[1], args[2]);
-               case 4: return new Target(args[0], args[1], args[2], args[3]);
-             }
-             // w/o altered newTarget, lot of arguments case
-             var $args = [null];
-             $args.push.apply($args, args);
-             return new (functionBind.apply(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;
-         }
-       });
-
-       // `Reflect.get` method
-       // https://tc39.es/ecma262/#sec-reflect.get
-       function get$2(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')
-           ? descriptor.value
-           : descriptor.get === undefined
-             ? undefined
-             : descriptor.get.call(receiver);
-         if (isObject(prototype = objectGetPrototypeOf(target))) return get$2(prototype, propertyKey, receiver);
-       }
-
-       _export({ target: 'Reflect', stat: true }, {
-         get: get$2
-       });
-
-       var nativeGetOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;
-
-
-       var FAILS_ON_PRIMITIVES$2 = fails(function () { nativeGetOwnPropertyDescriptor$2(1); });
-       var FORCED$6 = !descriptors || FAILS_ON_PRIMITIVES$2;
-
-       // `Object.getOwnPropertyDescriptor` method
-       // https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
-       _export({ target: 'Object', stat: true, forced: FORCED$6, sham: !descriptors }, {
-         getOwnPropertyDescriptor: function getOwnPropertyDescriptor(it, key) {
-           return nativeGetOwnPropertyDescriptor$2(toIndexedObject(it), key);
-         }
-       });
-
-       var HAS_SPECIES_SUPPORT$2 = arrayMethodHasSpeciesSupport('splice');
-
-       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.es/ecma262/#sec-array.prototype.splice
-       // with adding support of @@species
-       _export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$2 }, {
-         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;
-         }
-       });
-
-       // `Symbol.toStringTag` well-known symbol
-       // https://tc39.es/ecma262/#sec-symbol.tostringtag
-       defineWellKnownSymbol('toStringTag');
-
-       // Math[@@toStringTag] property
-       // https://tc39.es/ecma262/#sec-math-@@tostringtag
-       setToStringTag(Math, 'Math', true);
-
-       // JSON[@@toStringTag] property
-       // https://tc39.es/ecma262/#sec-json-@@tostringtag
-       setToStringTag(global_1.JSON, 'JSON', 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 (superClass) _setPrototypeOf(subClass, superClass);
-         }
-
-         function _getPrototypeOf(o) {
-           _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
-             return o.__proto__ || Object.getPrototypeOf(o);
-           };
-           return _getPrototypeOf(o);
-         }
-
-         function _setPrototypeOf(o, p) {
-           _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
-             o.__proto__ = p;
-             return o;
-           };
-
-           return _setPrototypeOf(o, p);
-         }
-
-         function _isNativeReflectConstruct() {
-           if (typeof Reflect === "undefined" || !Reflect.construct) return false;
-           if (Reflect.construct.sham) return false;
-           if (typeof Proxy === "function") return true;
-
-           try {
-             Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));
-             return true;
-           } catch (e) {
-             return false;
-           }
-         }
-
-         function _assertThisInitialized(self) {
-           if (self === void 0) {
-             throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
-           }
-
-           return self;
-         }
-
-         function _possibleConstructorReturn(self, call) {
-           if (call && (_typeof(call) === "object" || typeof call === "function")) {
-             return call;
-           }
-
-           return _assertThisInitialized(self);
-         }
-
-         function _createSuper(Derived) {
-           var hasNativeReflectConstruct = _isNativeReflectConstruct();
-
-           return function _createSuperInternal() {
-             var Super = _getPrototypeOf(Derived),
-                 result;
-
-             if (hasNativeReflectConstruct) {
-               var NewTarget = _getPrototypeOf(this).constructor;
-
-               result = Reflect.construct(Super, arguments, NewTarget);
-             } else {
-               result = Super.apply(this, arguments);
-             }
-
-             return _possibleConstructorReturn(this, result);
-           };
-         }
-
-         function _superPropBase(object, property) {
-           while (!Object.prototype.hasOwnProperty.call(object, property)) {
-             object = _getPrototypeOf(object);
-             if (object === null) break;
-           }
-
-           return object;
-         }
-
-         function _get(target, property, receiver) {
-           if (typeof Reflect !== "undefined" && Reflect.get) {
-             _get = Reflect.get;
-           } else {
-             _get = function _get(target, property, receiver) {
-               var base = _superPropBase(target, property);
-
-               if (!base) return;
-               var desc = Object.getOwnPropertyDescriptor(base, property);
-
-               if (desc.get) {
-                 return desc.get.call(receiver);
-               }
-
-               return desc.value;
-             };
-           }
-
-           return _get(target, property, receiver || target);
-         }
-
-         var Emitter = /*#__PURE__*/function () {
-           function Emitter() {
-             _classCallCheck(this, Emitter);
-
-             Object.defineProperty(this, 'listeners', {
-               value: {},
-               writable: true,
-               configurable: true
-             });
-           }
-
-           _createClass(Emitter, [{
-             key: "addEventListener",
-             value: function addEventListener(type, callback, options) {
-               if (!(type in this.listeners)) {
-                 this.listeners[type] = [];
-               }
-
-               this.listeners[type].push({
-                 callback: callback,
-                 options: options
-               });
-             }
-           }, {
-             key: "removeEventListener",
-             value: function removeEventListener(type, callback) {
-               if (!(type in this.listeners)) {
-                 return;
-               }
-
-               var stack = this.listeners[type];
-
-               for (var i = 0, l = stack.length; i < l; i++) {
-                 if (stack[i].callback === callback) {
-                   stack.splice(i, 1);
-                   return;
-                 }
-               }
-             }
-           }, {
-             key: "dispatchEvent",
-             value: function dispatchEvent(event) {
-               if (!(event.type in this.listeners)) {
-                 return;
-               }
-
-               var stack = this.listeners[event.type];
-               var stackToCall = stack.slice();
-
-               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;
-             }
-           }]);
-
-           return Emitter;
-         }();
-
-         var AbortSignal = /*#__PURE__*/function (_Emitter) {
-           _inherits(AbortSignal, _Emitter);
-
-           var _super = _createSuper(AbortSignal);
+           var _super = _createSuper(AbortSignal);
 
            function AbortSignal() {
              var _this;
          };
        }
 
-       var IS_CONCAT_SPREADABLE = wellKnownSymbol('isConcatSpreadable');
-       var MAX_SAFE_INTEGER$1 = 0x1FFFFFFFFFFFFF;
+       var $$M = _export;
+       var global$g = global$1o;
+       var fails$k = fails$V;
+       var isArray$3 = isArray$8;
+       var isObject$8 = isObject$s;
+       var toObject$6 = toObject$i;
+       var lengthOfArrayLike$4 = lengthOfArrayLike$i;
+       var createProperty$1 = createProperty$5;
+       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.es/ecma262/#sec-array.prototype.concat
        // with adding support of @@isConcatSpreadable and @@species
-       _export({ target: 'Array', proto: true, forced: FORCED$7 }, {
+       $$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(this);
-           var A = arraySpeciesCreate(O, 0);
+           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$4 = functionCall;
+       var fails$j = fails$V;
+       var objectKeys$1 = objectKeys$4;
+       var getOwnPropertySymbolsModule = objectGetOwnPropertySymbols;
+       var propertyIsEnumerableModule = objectPropertyIsEnumerable;
+       var toObject$5 = toObject$i;
+       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.es/ecma262/#sec-object.assign
-       _export({ target: 'Object', stat: true, forced: Object.assign !== objectAssign }, {
-         assign: objectAssign
-       });
+       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$4(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');
+       var HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('filter');
 
        // `Array.prototype.filter` method
        // https://tc39.es/ecma262/#sec-array.prototype.filter
        // with adding support of @@species
-       _export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$3 }, {
+       $$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 FAILS_ON_PRIMITIVES$3 = fails(function () { objectKeys(1); });
+       var $$J = _export;
+       var toObject$4 = toObject$i;
+       var nativeKeys = objectKeys$4;
+       var fails$i = fails$V;
+
+       var FAILS_ON_PRIMITIVES$2 = fails$i(function () { nativeKeys(1); });
 
        // `Object.keys` method
        // https://tc39.es/ecma262/#sec-object.keys
-       _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$3 }, {
+       $$J({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$2 }, {
          keys: function keys(it) {
-           return objectKeys(toObject(it));
+           return nativeKeys(toObject$4(it));
          }
        });
 
-       var nativeReverse = [].reverse;
+       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
-       _export({ target: 'Array', proto: true, forced: String(test$1) === String(test$1.reverse()) }, {
+       $$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(this)) this.length = this.length;
-           return nativeReverse.call(this);
+           if (isArray$2(this)) this.length = this.length;
+           return un$Reverse(this);
          }
        });
 
-       var trim = stringTrim.trim;
-
-
-       var $parseFloat = global_1.parseFloat;
-       var FORCED$8 = 1 / $parseFloat(whitespaces + '-0') !== -Infinity;
+       var global$f = global$1o;
+       var fails$h = fails$V;
+       var uncurryThis$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.es/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;
+       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.es/ecma262/#sec-parsefloat-string
-       _export({ global: true, forced: parseFloat != numberParseFloat }, {
-         parseFloat: numberParseFloat
+       $$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$1o;
+       var fails$g = fails$V;
+       var uncurryThis$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.es/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;
+       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.es/ecma262/#sec-parseint-string-radix
-       _export({ global: true, forced: parseInt != numberParseInt }, {
-         parseInt: numberParseInt
+       $$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$f = fails$V;
+
+       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$e = fails$V;
+       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$d = fails$V;
 
-       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$1o;
+       var uncurryThis$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$c = fails$V;
+       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;
              }
            );
          };
 
-         var REPLACE = isForced_1(
+         var REPLACE = isForced$2(
            CONSTRUCTOR_NAME,
-           typeof NativeConstructor != 'function' || !(IS_WEAK || NativePrototype.forEach && !fails(function () {
+           !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 -- required for testing
-           var ACCEPT_ITERABLES = checkCorrectnessOfIteration(function (iterable) { new NativeConstructor(iterable); });
+           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(iterable, that[ADDER], { that: that, AS_ENTRIES: 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$7 = objectDefineProperty.f;
+       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 Constructor = wrapper(function (that, iterable) {
+             anInstance$1(that, Prototype);
+             setInternalState$1(that, {
+               type: CONSTRUCTOR_NAME,
+               index: create$3(null),
+               first: undefined,
+               last: undefined,
+               size: 0
+             });
+             if (!DESCRIPTORS$6) that.size = 0;
+             if (iterable != undefined) iterate(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP });
+           });
 
-
-
-
-
-
-
-
-       var fastKey = internalMetadata.fastKey;
-
-
-       var setInternalState$7 = internalState.set;
-       var internalStateGetterFor = internalState.getterFor;
-
-       var collectionStrong = {
-         getConstructor: function (wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER) {
-           var C = wrapper(function (that, iterable) {
-             anInstance(that, C, CONSTRUCTOR_NAME);
-             setInternalState$7(that, {
-               type: CONSTRUCTOR_NAME,
-               index: objectCreate(null),
-               first: undefined,
-               last: undefined,
-               size: 0
-             });
-             if (!descriptors) 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);
 
                };
                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$7(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.es/ecma262/#sec-set-objects
-       var es_set = collection('Set', function (init) {
+       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.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;
+
+       var anObject$2 = anObject$n;
+       var iteratorClose = iteratorClose$2;
+
+       // 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 INCORRECT_ITERATION$1 = !checkCorrectnessOfIteration(function (iterable) {
+       var global$c = global$1o;
+       var bind$5 = functionBindContext;
+       var call$3 = functionCall;
+       var toObject$3 = toObject$i;
+       var callWithSafeIterationClosing = callWithSafeIterationClosing$1;
+       var isArrayIteratorMethod = isArrayIteratorMethod$3;
+       var isConstructor = isConstructor$4;
+       var lengthOfArrayLike$3 = lengthOfArrayLike$i;
+       var createProperty = createProperty$5;
+       var getIterator = getIterator$4;
+       var getIteratorMethod = getIteratorMethod$5;
+
+       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$3(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.es/ecma262/#sec-array.from
-       _export({ target: 'Array', stat: true, forced: INCORRECT_ITERATION$1 }, {
-         from: arrayFrom
+       $$D({ target: 'Array', stat: true, forced: INCORRECT_ITERATION }, {
+         from: from
        });
 
+       var $$C = _export;
+       var fill = arrayFill$1;
+       var addToUnscopables$4 = addToUnscopables$6;
+
        // `Array.prototype.fill` method
        // https://tc39.es/ecma262/#sec-array.prototype.fill
-       _export({ target: 'Array', proto: true }, {
-         fill: arrayFill
+       $$C({ target: 'Array', proto: true }, {
+         fill: fill
        });
 
        // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
-       addToUnscopables('fill');
-
-       var $some$1 = arrayIteration.some;
+       addToUnscopables$4('fill');
 
+       var $$B = _export;
+       var $some = arrayIteration.some;
+       var arrayMethodIsStrict$4 = arrayMethodIsStrict$9;
 
-       var STRICT_METHOD$4 = arrayMethodIsStrict('some');
+       var STRICT_METHOD$4 = arrayMethodIsStrict$4('some');
 
        // `Array.prototype.some` method
        // https://tc39.es/ecma262/#sec-array.prototype.some
-       _export({ target: 'Array', proto: true, forced: !STRICT_METHOD$4 }, {
+       $$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 exportTypedArrayStaticMethod$1 = arrayBufferViewCore.exportTypedArrayStaticMethod;
-
+       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$1('from', typedArrayFrom, typedArrayConstructorsRequireWrappers);
+       exportTypedArrayStaticMethod('from', typedArrayFrom, TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS);
+
+       var createTypedArrayConstructor = typedArrayConstructor.exports;
 
        // `Float64Array` constructor
        // https://tc39.es/ecma262/#sec-typedarray-objects
-       typedArrayConstructor('Float64', function (init) {
+       createTypedArrayConstructor('Float64', function (init) {
          return function Float64Array(data, byteOffset, length) {
            return init(this, data, byteOffset, length);
          };
        // 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 $$A = _export;
+       var DESCRIPTORS$5 = descriptors;
+       var defineProperties$1 = objectDefineProperties.f;
+
        // `Object.defineProperties` method
        // https://tc39.es/ecma262/#sec-object.defineproperties
-       _export({ target: 'Object', stat: true, forced: !descriptors, sham: !descriptors }, {
-         defineProperties: objectDefineProperties
+       // eslint-disable-next-line es/no-object-defineproperties -- safe
+       $$A({ target: 'Object', stat: true, forced: Object.defineProperties !== defineProperties$1, sham: !DESCRIPTORS$5 }, {
+         defineProperties: defineProperties$1
        });
 
+       var collection = collection$2;
+       var collectionStrong = collectionStrong$2;
+
        // `Map` constructor
        // https://tc39.es/ecma262/#sec-map-objects
-       var es_map = collection('Map', function (init) {
+       collection('Map', function (init) {
          return function Map() { return init(this, arguments.length ? arguments[0] : undefined); };
        }, collectionStrong);
 
-       var test$2 = [];
-       var nativeSort = test$2.sort;
+       var $$z = _export;
+       var uncurryThis$f = functionUncurryThis;
+       var aCallable$1 = aCallable$a;
+       var toObject$2 = toObject$i;
+       var lengthOfArrayLike$2 = lengthOfArrayLike$i;
+       var toString$a = toString$k;
+       var fails$b = fails$V;
+       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(function () {
-         test$2.sort(undefined);
+       var FAILS_ON_UNDEFINED = fails$b(function () {
+         test.sort(undefined);
        });
        // V8 bug
-       var FAILS_ON_NULL = fails(function () {
-         test$2.sort(null);
+       var FAILS_ON_NULL = fails$b(function () {
+         test.sort(null);
        });
        // Old WebKit
-       var STRICT_METHOD$5 = arrayMethodIsStrict('sort');
+       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$a = FAILS_ON_UNDEFINED || !FAILS_ON_NULL || !STRICT_METHOD$5;
+       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
-       _export({ target: 'Array', proto: true, forced: FORCED$a }, {
+       $$z({ target: 'Array', proto: true, forced: FORCED$7 }, {
          sort: function sort(comparefn) {
-           return comparefn === undefined
-             ? nativeSort.call(toObject(this))
-             : nativeSort.call(toObject(this), aFunction$1(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;
          }
        });
 
          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,
 
        // `SameValue` abstract operation
        // https://tc39.es/ecma262/#sec-samevalue
-       var sameValue = Object.is || function is(x, y) {
+       // 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
 
        // `Math.hypot` method
        // https://tc39.es/ecma262/#sec-math.hypot
-       _export({ target: 'Math', stat: true, forced: BUGGY }, {
+       $$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 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.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 -- NaN check
          return (x = +x) == 0 || x != x ? x : x < 0 ? -1 : 1;
        };
 
+       var $$x = _export;
+       var sign$1 = mathSign;
+
        // `Math.sign` method
        // https://tc39.es/ecma262/#sec-math.sign
-       _export({ target: 'Math', stat: true }, {
-         sign: mathSign
+       $$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 STRICT_METHOD$2 = arrayMethodIsStrict$2('every');
 
        // `Array.prototype.every` method
        // https://tc39.es/ecma262/#sec-array.prototype.every
-       _export({ target: 'Array', proto: true, forced: !STRICT_METHOD$6 }, {
+       $$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 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 = !engineIsNode && engineV8Version > 79 && engineV8Version < 83;
+       var CHROME_BUG$1 = !IS_NODE$1 && CHROME_VERSION$1 > 79 && CHROME_VERSION$1 < 83;
 
        // `Array.prototype.reduce` method
        // https://tc39.es/ecma262/#sec-array.prototype.reduce
-       _export({ target: 'Array', proto: true, forced: !STRICT_METHOD$7 || CHROME_BUG }, {
+       $$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 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.es/ecma262/#sec-array.prototype.find
-       _export({ target: 'Array', proto: true, forced: SKIPS_HOLES }, {
+       $$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.es/ecma262/#sec-array.prototype-@@unscopables
-       addToUnscopables(FIND);
+       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;
          };
          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$8 = objectDefineProperty.f;
+       var DESCRIPTORS$4 = descriptors;
+       var global$b = global$1o;
+       var uncurryThis$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$a = fails$V;
+       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 MISSED_STICKY = stickyHelpers.MISSED_STICKY;
+       var UNSUPPORTED_Y = stickyHelpers.UNSUPPORTED_Y;
+
+       var BASE_FORCED = DESCRIPTORS$4 &&
+         (!CORRECT_NEW || MISSED_STICKY || UNSUPPORTED_DOT_ALL || UNSUPPORTED_NCG || fails$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 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 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.es/ecma262/#sec-regexp-constructor
-       if (FORCED$b) {
+       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);
+           }
+
+           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, '');
            }
 
-           if (UNSUPPORTED_Y$2) {
-             sticky = !!flags && flags.indexOf('y') > -1;
-             if (sticky) flags = flags.replace(/y/g, '');
+           rawFlags = flags;
+
+           if (MISSED_STICKY && 'sticky' in re1) {
+             sticky = !!flags && stringIndexOf$1(flags, 'y') > -1;
+             if (sticky && UNSUPPORTED_Y) flags = replace$3(flags, /y/g, '');
            }
 
-           var result = inheritIfRequired(
-             CORRECT_NEW ? new NativeRegExp(pattern, flags) : NativeRegExp(pattern, flags),
-             thisIsRegExp ? this : RegExpPrototype$1,
-             RegExpWrapper
-           );
+           if (UNSUPPORTED_NCG) {
+             handled = handleNCG(pattern);
+             pattern = handled[0];
+             groups = handled[1];
+           }
+
+           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 (UNSUPPORTED_Y$2 && sticky) setInternalState$8(result, { sticky: sticky });
+           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$8(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.es/ecma262/#sec-get-regexp-@@species
          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 $$t = _export;
+       var bind$4 = functionBind;
+
        // `Function.prototype.bind` method
        // https://tc39.es/ecma262/#sec-function.prototype.bind
-       _export({ target: 'Function', proto: true }, {
-         bind: functionBind
+       $$t({ target: 'Function', proto: true, forced: Function.bind !== bind$4 }, {
+         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$2 = 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$2(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$9 = fails$V;
+       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.es/ecma262/#sec-object.freeze
-       _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$4, sham: !freezing }, {
+       $$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.es/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.es/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$1o;
+       var uncurryThis$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$8 = fails$V;
+       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"]
-           },
-           "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"
-             },
-             "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"
+       Object.defineProperty(unicodeArabic, "__esModule", {
+         value: true
+       });
+       var arabicReference = {
+         "alef": {
+           "normal": ["\u0627"],
+           "madda_above": {
+             "normal": ["\u0627\u0653", "\u0622"],
+             "isolated": "\uFE81",
+             "final": "\uFE82"
            },
-           "e": {
-             "normal": ["\u06D0"],
-             "isolated": "\uFBE4",
-             "final": "\uFBE5",
-             "initial": "\uFBE6",
-             "medial": "\uFBE7"
+           "hamza_above": {
+             "normal": ["\u0627\u0654", "\u0623"],
+             "isolated": "\uFE83",
+             "final": "\uFE84"
            },
-           "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"
+           "hamza_below": {
+             "normal": ["\u0627\u0655", "\u0625"],
+             "isolated": "\uFE87",
+             "final": "\uFE88"
            },
-           "ae": {
-             "normal": ["\u06D5"],
-             "isolated": "\u06D5",
-             "final": "\uFEEA",
-             "yeh_above": {
-               "normal": ["\u06C0", "\u06D5\u0654"],
-               "isolated": "\uFBA4",
-               "final": "\uFBA5"
-             }
+           "wasla": {
+             "normal": "\u0671",
+             "isolated": "\uFB50",
+             "final": "\uFB51"
            },
-           "rohingya yeh": {
-             "normal": ["\u08AC"]
+           "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"
            },
-           "low alef": {
-             "normal": ["\u08AD"]
+           "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"
            },
-           "straight waw": {
-             "normal": ["\u08B1"]
+           "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"
            },
-           "african feh": {
-             "normal": ["\u08BB"]
+           "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"
            },
-           "african qaf": {
-             "normal": ["\u08BC"]
+           "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"
            },
-           "african noon": {
-             "normal": ["\u08BD"]
+           "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"
            }
-         };
-         exports["default"] = arabicReference;
-       });
+         },
+         "rohingya yeh": {
+           "normal": ["\u08AC"]
+         },
+         "low alef": {
+           "normal": ["\u08AD"]
+         },
+         "straight waw": {
+           "normal": ["\u08B1"]
+         },
+         "african feh": {
+           "normal": ["\u08BB"]
+         },
+         "african qaf": {
+           "normal": ["\u08BC"]
+         },
+         "african noon": {
+           "normal": ["\u08BD"]
+         }
+       };
 
-       var unicodeLigatures = createCommonjsModule(function (module, exports) {
+       unicodeArabic["default"] = arabicReference;
 
-         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"
+       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"
            },
-           "\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;
-       });
+           "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"
+         }
+       };
 
-       var reference = createCommonjsModule(function (module, exports) {
+       unicodeLigatures["default"] = ligatureReference;
 
-         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]);
-         //   }
-         // }
+       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";
-         exports.tashkeel = tashkeel;
+       var tashkeel = "\u0605\u0640\u0670\u0674\u06DF\u06E7\u06E8";
+       reference.tashkeel = tashkeel;
 
-         function addToTashkeel(start, finish) {
-           for (var i = start; i <= finish; i++) {
-             exports.tashkeel = tashkeel += String.fromCharCode(i);
-           }
+       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";
-         exports.lineBreakers = lineBreakers;
+       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++) {
-             exports.lineBreakers = lineBreakers += String.fromCharCode(i);
-           }
+       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(0x0600, 0x061F); // it's OK to include tashkeel in this range as it is ignored
 
-         addToLineBreakers(0xFE80, 0xFEFC); // presentation forms look like they could connect, but never do
-         // numerals, math
+       addToLineBreakers(0x0621, 0x0625);
+       addToLineBreakers(0x062F, 0x0632);
+       addToLineBreakers(0x0660, 0x066D); // numerals, math
 
-         addToLineBreakers(0x10E60, 0x10E7F);
-         addToLineBreakers(0x1EC70, 0x1ECBF);
-         addToLineBreakers(0x1EE00, 0x1EEFF);
-       });
+       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
 
-       var GlyphSplitter_1 = createCommonjsModule(function (module, exports) {
+       addToLineBreakers(0xFE80, 0xFEFC); // presentation forms look like they could connect, but never do
+       // numerals, math
 
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
+       addToLineBreakers(0x10E60, 0x10E7F);
+       addToLineBreakers(0x1EC70, 0x1ECBF);
+       addToLineBreakers(0x1EE00, 0x1EEFF);
 
-         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);
-               }
+       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);
              }
+           } else {
+             letters.push(letter);
+           }
 
-             if (reference.tashkeel.indexOf(letter) === -1) {
-               lastLetter = letter;
-             }
-           });
-           return letters;
-         }
-
-         exports.GlyphSplitter = GlyphSplitter;
-       });
+           if (reference_1$5.tashkeel.indexOf(letter) === -1) {
+             lastLetter = letter;
+           }
+         });
+         return letters;
+       }
 
-       var BaselineSplitter_1 = createCommonjsModule(function (module, exports) {
+       GlyphSplitter$1.GlyphSplitter = GlyphSplitter;
 
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
+       var BaselineSplitter$1 = {};
 
-         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 {
+       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);
+           }
 
-             if (reference.tashkeel.indexOf(letter) === -1) {
-               // don't allow tashkeel to hide line break
-               lastLetter = letter;
-             }
-           });
-           return letters;
-         }
+           if (reference_1$4.tashkeel.indexOf(letter) === -1) {
+             // don't allow tashkeel to hide line break
+             lastLetter = letter;
+           }
+         });
+         return letters;
+       }
 
-         exports.BaselineSplitter = BaselineSplitter;
-       });
+       BaselineSplitter$1.BaselineSplitter = BaselineSplitter;
 
-       var Normalization = createCommonjsModule(function (module, exports) {
+       var Normalization = {};
 
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
+       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;
 
-         function Normal(word, breakPresentationForm) {
-           // default is to turn initial/isolated/medial/final presentation form to generic
-           if (typeof breakPresentationForm === 'undefined') {
-             breakPresentationForm = 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.isArabic(letter)) {
-               returnable += letter;
-               return;
-             }
+         var returnable = '';
+         word.split('').forEach(function (letter) {
+           if (!isArabic_1$4.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$4;
+       var toIndexedObject = toIndexedObject$d;
+       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.es/ecma262/#sec-object.entries
-         entries: createMethod$5(true),
+         entries: createMethod$1(true),
          // `Object.values` method
          // https://tc39.es/ecma262/#sec-object.values
-         values: createMethod$5(false)
+         values: createMethod$1(false)
        };
 
+       var $$r = _export;
        var $values = objectToArray.values;
 
        // `Object.values` method
        // https://tc39.es/ecma262/#sec-object.values
-       _export({ target: 'Object', stat: true }, {
+       $$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 = "2.20.4";
+       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$1o;
+       var toIntegerOrInfinity$1 = toIntegerOrInfinity$b;
+       var toString$7 = toString$k;
+       var requireObjectCoercible$6 = requireObjectCoercible$e;
 
-       var FIND_INDEX = 'findIndex';
-       var SKIPS_HOLES$1 = true;
-
-       // Shouldn't skip holes
-       if (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES$1 = false; });
+       var RangeError$5 = global$9.RangeError;
 
-       // `Array.prototype.findIndex` method
-       // https://tc39.es/ecma262/#sec-array.prototype.findindex
-       _export({ target: 'Array', proto: true, forced: SKIPS_HOLES$1 }, {
-         findIndex: function findIndex(callbackfn /* , that = undefined */) {
-           return $findIndex$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-         }
-       });
+       // `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;
+       };
 
-       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
-       addToUnscopables(FIND_INDEX);
+       var $$q = _export;
+       var global$8 = global$1o;
+       var uncurryThis$a = functionUncurryThis;
+       var toIntegerOrInfinity = toIntegerOrInfinity$b;
+       var thisNumberValue$1 = thisNumberValue$3;
+       var $repeat$1 = stringRepeat;
+       var fails$7 = fails$V;
 
-       var $includes$1 = arrayIncludes.includes;
+       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);
 
+       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);
+       };
 
-       // `Array.prototype.includes` method
-       // https://tc39.es/ecma262/#sec-array.prototype.includes
-       _export({ target: 'Array', proto: true }, {
-         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.es/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 (error1) {
-           try {
-             regexp[MATCH$2] = false;
-             return '/./'[METHOD_NAME](regexp);
-           } catch (error2) { /* 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.es/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];
+           // TODO: ES2018 increased the maximum number of fraction digits to 100, need to improve the implementation
+           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$1o;
 
-           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$1o;
+       var uncurryThis$9 = functionUncurryThis;
+       var toAbsoluteIndex = toAbsoluteIndex$9;
 
-         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 loc = window.top.location;
-         var origin = loc.origin;
+       var call$1 = functionCall;
+       var fixRegExpWellKnownSymbolLogic = fixRegexpWellKnownSymbolLogic;
+       var anObject = anObject$n;
+       var requireObjectCoercible$5 = requireObjectCoercible$e;
+       var sameValue = sameValue$1;
+       var toString$6 = toString$k;
+       var getMethod = getMethod$7;
+       var regExpExec = regexpExecAbstract;
 
-         if (!origin) {
-           // for unpatched IE11
-           origin = loc.protocol + '//' + loc.hostname + (loc.port ? ':' + loc.port : '');
-         }
+       // @@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$1(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);
 
-         _detected.host = origin + loc.pathname;
-         return _detected;
-       }
+             if (res.done) return res.value;
 
-       // `Number.MAX_SAFE_INTEGER` constant
-       // https://tc39.es/ecma262/#sec-number.max_safe_integer
-       _export({ target: 'Number', stat: true }, {
-         MAX_SAFE_INTEGER: 0x1FFFFFFFFFFFFF
+             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$9 = 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.es/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.es/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,' +
-           // ESNext
-           'fromString,range'
-         ).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$9(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);
+               }
 
-       var aesJs = createCommonjsModule(function (module, exports) {
-         /*! MIT License. Copyright 2015-2018 Richard Moore <me@ricmoo.com>. See LICENSE.txt. */
-         (function (root) {
+               var t = arr[k];
+               var i = left;
+               var j = right;
+               swap(arr, left, k);
+               if (compare(arr[right], t) > 0) swap(arr, left, right);
 
-           function checkInt(value) {
-             return parseInt(value) === value;
-           }
+               while (i < j) {
+                 swap(arr, i, j);
+                 i++;
+                 j--;
 
-           function checkInts(arrayish) {
-             if (!checkInt(arrayish.length)) {
-               return false;
-             }
+                 while (compare(arr[i], t) < 0) {
+                   i++;
+                 }
 
-             for (var i = 0; i < arrayish.length; i++) {
-               if (!checkInt(arrayish[i]) || arrayish[i] < 0 || arrayish[i] > 255) {
-                 return false;
+                 while (compare(arr[j], t) > 0) {
+                   j--;
+                 }
                }
+
+               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);
 
-           var numberOfRounds = {
-             16: 10,
-             24: 12,
-             32: 14
-           }; // Round constant words
+               if (index !== -1) {
+                 // item found, remove the item and condense tree upwards
+                 node.children.splice(index, 1);
+                 path.push(node);
 
-           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)
+                 this._condense(path);
 
-           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
+                 return this;
+               }
+             }
 
-           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
+             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 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);
+           }
 
-             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];
-               }
+           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] + '};');
+         }
+       };
 
-               t = a.slice();
-             } // the last round is special
+       function findItem$1(item, items, equalsFn) {
+         if (!equalsFn) return items.indexOf(item);
 
+         for (var i = 0; i < items.length; i++) {
+           if (equalsFn(item, items[i])) return i;
+         }
 
-             var result = createArray(16),
-                 tt;
+         return -1;
+       } // calculate node's bbox from bboxes of its children
 
-             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;
-           };
+       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
 
-           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)
+       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 t = convertToInt32(ciphertext);
+         for (var i = k, child; i < p; i++) {
+           child = node.children[i];
+           extend$2(destNode, node.leaf ? toBBox(child) : child);
+         }
 
-             for (var i = 0; i < 4; i++) {
-               t[i] ^= this._Kd[0][i];
-             } // apply round transforms
+         return destNode;
+       }
 
+       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;
+       }
 
-             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 compareNodeMinX$1(a, b) {
+         return a.minX - b.minX;
+       }
 
-               t = a.slice();
-             } // the last round is special
+       function compareNodeMinY$1(a, b) {
+         return a.minY - b.minY;
+       }
 
+       function bboxArea$1(a) {
+         return (a.maxX - a.minX) * (a.maxY - a.minY);
+       }
 
-             var result = createArray(16),
-                 tt;
+       function bboxMargin$1(a) {
+         return a.maxX - a.minX + (a.maxY - 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 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));
+       }
 
-             return result;
-           };
-           /**
-            *  Mode Of Operation - Electonic Codebook (ECB)
-            */
+       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);
+       }
 
+       function contains$1(a, b) {
+         return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
+       }
 
-           var ModeOfOperationECB = function ModeOfOperationECB(key) {
-             if (!(this instanceof ModeOfOperationECB)) {
-               throw Error('AES must be instanitated with `new`');
-             }
+       function intersects$1(a, b) {
+         return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
+       }
 
-             this.description = "Electronic Code Block";
-             this.name = "ecb";
-             this._aes = new AES(key);
-           };
+       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
 
-           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];
-               }
+       function multiSelect$1(arr, left, right, n, compare) {
+         var stack = [left, right],
+             mid;
 
-               this._lastCipherblock = this._aes.encrypt(block);
-               copyArray(this._lastCipherblock, ciphertext, i);
-             }
+         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);
+         }
+       }
 
-             return ciphertext;
-           };
+       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
 
-           ModeOfOperationCBC.prototype.decrypt = function (ciphertext) {
-             ciphertext = coerceArray(ciphertext);
+       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 = [];
 
-             if (ciphertext.length % 16 !== 0) {
-               throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
-             }
+         for (i = 1; i < len; i++) {
+           a = points[i - 1];
+           b = points[i];
+           codeB = lastCode = bitCode$1(b, bbox);
 
-             var plaintext = createArray(ciphertext.length);
-             var block = createArray(16);
+           while (true) {
+             if (!(codeA | codeB)) {
+               // accept
+               part.push(a);
 
-             for (var i = 0; i < ciphertext.length; i += 16) {
-               copyArray(ciphertext, block, 0, i, i + 16);
-               block = this._aes.decrypt(block);
+               if (codeB !== lastCode) {
+                 // segment went outside
+                 part.push(b);
 
-               for (var j = 0; j < 16; j++) {
-                 plaintext[i + j] = block[j] ^ this._lastCipherblock[j];
+                 if (i < len - 1) {
+                   // start a new line
+                   result.push(part);
+                   part = [];
+                 }
+               } else if (i === len - 1) {
+                 part.push(b);
                }
 
-               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);
+               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 - Output Feedback (OFB)
-            */
+           codeA = lastCode;
+         }
 
+         if (part.length) result.push(part);
+         return result;
+       } // Sutherland-Hodgeman polygon clipping algorithm
 
-           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";
+       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)');
-             }
+         for (edge = 1; edge <= 8; edge *= 2) {
+           result = [];
+           prev = points[points.length - 1];
+           prevInside = !(bitCode$1(prev, bbox) & edge);
 
-             this._lastPrecipher = coerceArray(iv, true);
-             this._lastPrecipherIndex = 16;
-             this._aes = new AES(key);
-           };
+           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
 
-           ModeOfOperationOFB.prototype.encrypt = function (plaintext) {
-             var encrypted = coerceArray(plaintext, true);
+             if (inside !== prevInside) result.push(intersect$1(prev, p, edge, bbox));
+             if (inside) result.push(p); // add a point if it's inside
 
-             for (var i = 0; i < encrypted.length; i++) {
-               if (this._lastPrecipherIndex === 16) {
-                 this._lastPrecipher = this._aes.encrypt(this._lastPrecipher);
-                 this._lastPrecipherIndex = 0;
-               }
+             prev = p;
+             prevInside = inside;
+           }
 
-               encrypted[i] ^= this._lastPrecipher[this._lastPrecipherIndex++];
-             }
+           points = result;
+           if (!points.length) break;
+         }
 
-             return encrypted;
-           }; // Decryption is symetric
+         return result;
+       } // intersect a segment against one of the 4 lines that make up the bbox
 
 
-           ModeOfOperationOFB.prototype.decrypt = ModeOfOperationOFB.prototype.encrypt;
-           /**
-            *  Counter object for CTR common mode of operation
-            */
+       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
 
-           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
 
+       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
 
-             if (initialValue !== 0 && !initialValue) {
-               initialValue = 1;
-             }
+         if (p[1] < bbox[1]) code |= 4; // bottom
+         else if (p[1] > bbox[3]) code |= 8; // top
 
-             if (typeof initialValue === 'number') {
-               this._counter = createArray(16);
-               this.setValue(initialValue);
-             } else {
-               this.setBytes(initialValue);
-             }
-           };
+         return code;
+       }
 
-           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
+       var rbush = rbush$2.exports;
+       var lineclip$1 = lineclip_1;
+       var whichPolygon_1 = whichPolygon;
 
+       function whichPolygon(data) {
+         var bboxes = [];
 
-             if (value > Number.MAX_SAFE_INTEGER) {
-               throw new Error('integer value out of safe range');
-             }
+         for (var i = 0; i < data.features.length; i++) {
+           var feature = data.features[i];
+           var coords = feature.geometry.coordinates;
 
-             for (var index = 15; index >= 0; --index) {
-               this._counter[index] = value % 256;
-               value = parseInt(value / 256);
+           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));
              }
-           };
-
-           Counter.prototype.setBytes = function (bytes) {
-             bytes = coerceArray(bytes, true);
+           }
+         }
 
-             if (bytes.length != 16) {
-               throw new Error('invalid counter bytes size (must be 16 bytes)');
-             }
+         var tree = rbush().load(bboxes);
 
-             this._counter = bytes;
-           };
+         function query(p, multi) {
+           var output = [],
+               result = tree.search({
+             minX: p[0],
+             minY: p[1],
+             maxX: p[0],
+             maxY: p[1]
+           });
 
-           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;
-               }
+           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;
              }
-           };
-           /**
-            *  Mode Of Operation - Counter (CTR)
-            */
+           }
 
+           return multi && output.length ? output : null;
+         }
 
-           var ModeOfOperationCTR = function ModeOfOperationCTR(key, counter) {
-             if (!(this instanceof ModeOfOperationCTR)) {
-               throw Error('AES must be instanitated with `new`');
-             }
+         query.tree = tree;
 
-             this.description = "Counter";
-             this.name = "ctr";
+         query.bbox = function queryBBox(bbox) {
+           var output = [];
+           var result = tree.search({
+             minX: bbox[0],
+             minY: bbox[1],
+             maxX: bbox[2],
+             maxY: bbox[3]
+           });
 
-             if (!(counter instanceof Counter)) {
-               counter = new Counter(counter);
+           for (var i = 0; i < result.length; i++) {
+             if (polygonIntersectsBBox(result[i].coords, bbox)) {
+               output.push(result[i].props);
              }
+           }
 
-             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;
+           return output;
+         };
 
-                 this._counter.increment();
-               }
+         return query;
+       }
 
-               encrypted[i] ^= this._remainingCounter[this._remainingCounterIndex++];
-             }
+       function polygonIntersectsBBox(polygon, bbox) {
+         var bboxCenter = [(bbox[0] + bbox[2]) / 2, (bbox[1] + bbox[3]) / 2];
+         if (insidePolygon(polygon, bboxCenter)) return true;
 
-             return encrypted;
-           }; // Decryption is symetric
+         for (var i = 0; i < polygon.length; i++) {
+           if (lineclip$1(polygon[i], bbox).length > 0) return true;
+         }
 
+         return false;
+       } // ray casting algorithm for detecting if point is in polygon
 
-           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);
+       function insidePolygon(rings, p) {
+         var inside = false;
 
-             for (var i = data.length; i < result.length; i++) {
-               result[i] = padder;
-             }
+         for (var i = 0, len = rings.length; i < len; i++) {
+           var ring = rings[i];
 
-             return result;
+           for (var j = 0, len2 = ring.length, k = len2 - 1; j < len2; k = j++) {
+             if (rayIntersect(p, ring[j], ring[k])) inside = !inside;
            }
+         }
 
-           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');
-             }
+         return inside;
+       }
 
-             var length = data.length - padder;
+       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];
+       }
 
-             for (var i = 0; i < padder; i++) {
-               if (data[length + i] !== padder) {
-                 throw new Error('PKCS#7 invalid padding byte');
-               }
-             }
+       function treeItem(coords, props) {
+         var item = {
+           minX: Infinity,
+           minY: Infinity,
+           maxX: -Infinity,
+           maxY: -Infinity,
+           coords: coords,
+           props: props
+         };
 
-             var result = createArray(length);
-             copyArray(data, result, 0, 0, length);
-             return result;
-           } ///////////////////////
-           // Exporting
-           // The block cipher
+         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 item;
+       }
 
-           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
+       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",
+           coordinates: [[[[5.45168, 54.20039], [2.56575, 51.85301], [3.36263, 51.37112], [3.38696, 51.33436], [3.35847, 51.31572], [3.38289, 51.27331], [3.41704, 51.25933], [3.43488, 51.24135], [3.52698, 51.2458], [3.51502, 51.28697], [3.58939, 51.30064], [3.78999, 51.25766], [3.78783, 51.2151], [3.90125, 51.20371], [3.97889, 51.22537], [4.01957, 51.24504], [4.05165, 51.24171], [4.16721, 51.29348], [4.24024, 51.35371], [4.21923, 51.37443], [4.33265, 51.37687], [4.34086, 51.35738], [4.39292, 51.35547], [4.43777, 51.36989], [4.38064, 51.41965], [4.39747, 51.43316], [4.38122, 51.44905], [4.47736, 51.4778], [4.5388, 51.48184], [4.54675, 51.47265], [4.52846, 51.45002], [4.53521, 51.4243], [4.57489, 51.4324], [4.65442, 51.42352], [4.72935, 51.48424], [4.74578, 51.48937], [4.77321, 51.50529], [4.78803, 51.50284], [4.84139, 51.4799], [4.82409, 51.44736], [4.82946, 51.4213], [4.78314, 51.43319], [4.76577, 51.43046], [4.77229, 51.41337], [4.78941, 51.41102], [4.84988, 51.41502], [4.90016, 51.41404], [4.92152, 51.39487], [5.00393, 51.44406], [5.0106, 51.47167], [5.03281, 51.48679], [5.04774, 51.47022], [5.07891, 51.4715], [5.10456, 51.43163], [5.07102, 51.39469], [5.13105, 51.34791], [5.13377, 51.31592], [5.16222, 51.31035], [5.2002, 51.32243], [5.24244, 51.30495], [5.22542, 51.26888], [5.23814, 51.26064], [5.26461, 51.26693], [5.29716, 51.26104], [5.33886, 51.26314], [5.347, 51.27502], [5.41672, 51.26248], [5.4407, 51.28169], [5.46519, 51.2849], [5.48476, 51.30053], [5.515, 51.29462], [5.5569, 51.26544], [5.5603, 51.22249], [5.65145, 51.19788], [5.65528, 51.18736], [5.70344, 51.1829], [5.74617, 51.18928], [5.77735, 51.17845], [5.77697, 51.1522], [5.82564, 51.16753], [5.85508, 51.14445], [5.80798, 51.11661], [5.8109, 51.10861], [5.83226, 51.10585], [5.82921, 51.09328], [5.79903, 51.09371], [5.79835, 51.05834], [5.77258, 51.06196], [5.75961, 51.03113], [5.77688, 51.02483], [5.76242, 50.99703], [5.71864, 50.96092], [5.72875, 50.95428], [5.74752, 50.96202], [5.75927, 50.95601], [5.74644, 50.94723], [5.72545, 50.92312], [5.72644, 50.91167], [5.71626, 50.90796], [5.69858, 50.91046], [5.67886, 50.88142], [5.64504, 50.87107], [5.64009, 50.84742], [5.65259, 50.82309], [5.70118, 50.80764], [5.68995, 50.79641], [5.70107, 50.7827], [5.68091, 50.75804], [5.69469, 50.75529], [5.72216, 50.76398], [5.73904, 50.75674], [5.74356, 50.7691], [5.76533, 50.78159], [5.77513, 50.78308], [5.80673, 50.7558], [5.84548, 50.76542], [5.84888, 50.75448], [5.88734, 50.77092], [5.89129, 50.75125], [5.89132, 50.75124], [5.95942, 50.7622], [5.97545, 50.75441], [6.01976, 50.75398], [6.02624, 50.77453], [5.97497, 50.79992], [5.98404, 50.80988], [6.00462, 50.80065], [6.02328, 50.81694], [6.01921, 50.84435], [6.05623, 50.8572], [6.05702, 50.85179], [6.07431, 50.84674], [6.07693, 50.86025], [6.08805, 50.87223], [6.07486, 50.89307], [6.09297, 50.92066], [6.01615, 50.93367], [6.02697, 50.98303], [5.95282, 50.98728], [5.90296, 50.97356], [5.90493, 51.00198], [5.87849, 51.01969], [5.86735, 51.05182], [5.9134, 51.06736], [5.9541, 51.03496], [5.98292, 51.07469], [6.16706, 51.15677], [6.17384, 51.19589], [6.07889, 51.17038], [6.07889, 51.24432], [6.16977, 51.33169], [6.22674, 51.36135], [6.22641, 51.39948], [6.20654, 51.40049], [6.21724, 51.48568], [6.18017, 51.54096], [6.09055, 51.60564], [6.11759, 51.65609], [6.02767, 51.6742], [6.04091, 51.71821], [5.95003, 51.7493], [5.98665, 51.76944], [5.94568, 51.82786], [5.99848, 51.83195], [6.06705, 51.86136], [6.10337, 51.84829], [6.16902, 51.84094], [6.11551, 51.89769], [6.15349, 51.90439], [6.21443, 51.86801], [6.29872, 51.86801], [6.30593, 51.84998], [6.40704, 51.82771], [6.38815, 51.87257], [6.47179, 51.85395], [6.50231, 51.86313], [6.58556, 51.89386], [6.68386, 51.91861], [6.72319, 51.89518], [6.82357, 51.96711], [6.83035, 51.9905], [6.68128, 52.05052], [6.76117, 52.11895], [6.83984, 52.11728], [6.97189, 52.20329], [6.9897, 52.2271], [7.03729, 52.22695], [7.06365, 52.23789], [7.02703, 52.27941], [7.07044, 52.37805], [7.03417, 52.40237], [6.99041, 52.47235], [6.94293, 52.43597], [6.69507, 52.488], [6.71641, 52.62905], [6.77307, 52.65375], [7.04557, 52.63318], [7.07253, 52.81083], [7.21694, 53.00742], [7.17898, 53.13817], [7.22681, 53.18165], [7.21679, 53.20058], [7.19052, 53.31866], [7.00198, 53.32672], [6.91025, 53.44221], [5.45168, 54.20039]], [[4.93295, 51.44945], [4.95244, 51.45207], [4.9524, 51.45014], [4.93909, 51.44632], [4.93295, 51.44945]], [[4.91493, 51.4353], [4.91935, 51.43634], [4.92227, 51.44252], [4.91811, 51.44621], [4.92287, 51.44741], [4.92811, 51.4437], [4.92566, 51.44273], [4.92815, 51.43856], [4.92879, 51.44161], [4.93544, 51.44634], [4.94025, 51.44193], [4.93416, 51.44185], [4.93471, 51.43861], [4.94265, 51.44003], [4.93986, 51.43064], [4.92952, 51.42984], [4.92652, 51.43329], [4.91493, 51.4353]]]]
+         }
+       }, {
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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$6 = fails$V;
+
+       // 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 $$k = _export;
+       var fails$5 = fails$V;
+       var toObject$1 = toObject$i;
+       var toPrimitive = toPrimitive$3;
+
+       var FORCED$5 = fails$5(function () {
+         return new Date(NaN).toJSON() !== null
+           || Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;
+       });
+
+       // `Date.prototype.toJSON` method
+       // https://tc39.es/ecma262/#sec-date.prototype.tojson
+       $$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 $$j = _export;
+       var call = functionCall;
+
+       // `URL.prototype.toJSON` method
+       // https://url.spec.whatwg.org/#dom-url-tojson
+       $$j({ target: 'URL', proto: true, enumerable: true }, {
+         toJSON: function toJSON() {
+           return call(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 (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$1o;
+       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
+       });
+
+       /** Used to map HTML entities to characters. */
+
+       var htmlUnescapes = {
+         '&amp;': '&',
+         '&lt;': '<',
+         '&gt;': '>',
+         '&quot;': '"',
+         '&#39;': "'"
+       };
+       /**
+        * Used by `_.unescape` to convert HTML entities to characters.
+        *
+        * @private
+        * @param {string} chr The matched character to unescape.
+        * @returns {string} Returns the unescaped character.
+        */
+
+       var unescapeHtmlChar = basePropertyOf(htmlUnescapes);
+
+       /** Used to match HTML entities and HTML characters. */
+
+       var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
+           reHasEscapedHtml = RegExp(reEscapedHtml.source);
+       /**
+        * 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'
+        */
+
+       function unescape$3(string) {
+         string = toString$3(string);
+         return string && reHasEscapedHtml.test(string) ? string.replace(reEscapedHtml, unescapeHtmlChar) : string;
+       }
+
+       var global$4 = global$1o;
+       var isArray = isArray$8;
+       var lengthOfArrayLike$1 = lengthOfArrayLike$i;
+       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 $$e = _export;
+       var flattenIntoArray = flattenIntoArray_1;
+       var aCallable = aCallable$a;
+       var toObject = toObject$i;
+       var lengthOfArrayLike = lengthOfArrayLike$i;
+       var arraySpeciesCreate = arraySpeciesCreate$4;
+
+       // `Array.prototype.flatMap` method
+       // https://tc39.es/ecma262/#sec-array.prototype.flatmap
+       $$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];
 
-           {
-             module.exports = aesjs; // RequireJS/AMD
-             // http://www.requirejs.org/docs/api.html
-             // https://github.com/amdjs/amdjs-api/wiki/AMD
+           if ((oldVal || oldVal === '') && (newVal === undefined || newVal !== oldVal)) {
+             tagDiff.push({
+               type: '-',
+               key: k,
+               oldVal: oldVal,
+               newVal: newVal,
+               display: '- ' + k + '=' + oldVal
+             });
            }
-         })();
-       });
-
-       // 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;
+           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 utilCleanTags(tags) {
-         var out = {};
+       function utilEntityOrMemberSelector(ids, graph) {
+         var seen = new Set(ids);
+         ids.forEach(collectShallowDescendants);
+         return utilEntitySelector(Array.from(seen));
 
-         for (var k in tags) {
-           if (!k) continue;
-           var v = tags[k];
+         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
 
-           if (v !== undefined) {
-             out[k] = cleanValue(k, v);
-           }
+       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
 
-         return out;
+       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 cleanValue(k, v) {
-           function keepSpaces(k) {
-             return /_hours|_times|:conditional$/.test(k);
-           }
+         function collectDeepDescendants(id) {
+           if (seen.has(id)) return;
+           seen.add(id);
 
-           function skip(k) {
-             return /^(description|note|fixme)$/.test(k);
+           if (!idsSet.has(id)) {
+             returners.add(id);
            }
 
-           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
+           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
 
-           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
-           }
+       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
 
-           return cleaned;
+       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 = [];
 
-       // 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;
-           }
+         if (tags.network) {
+           keyComponents.push('network');
+         }
 
-           function valueConstant() {
-             if (this.value !== value) {
-               this.value = value;
-             }
-           }
+         if (tags.ref) {
+           keyComponents.push('ref');
+         } // Routes may need more disambiguation based on direction or destination
 
-           function valueFunction() {
-             var x = value.apply(this, arguments);
 
-             if (x === null || x === undefined) {
-               delete this.value;
-             } else if (this.value !== x) {
-               this.value = x;
+         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');
              }
            }
+         }
 
-           return value === null || value === undefined ? valueNull : typeof value === 'function' ? valueFunction : valueConstant;
+         if (keyComponents.length) {
+           name = _t('inspector.display_name.' + keyComponents.join('_'), tags);
          }
 
-         if (arguments.length === 1) {
-           return selection.property('value');
+         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 selection.each(d3_selection_value(value));
+         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 utilKeybinding(namespace) {
-         var _keybindings = {};
+       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());
 
-         function testBindings(d3_event, isCapturing) {
-           var didMatch = false;
-           var bindings = Object.keys(_keybindings).map(function (id) {
-             return _keybindings[id];
+         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);
            });
-           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
+         });
+         entities.forEach(function (entity) {
+           allKeys.forEach(function (key) {
+             var value = entity.tags[key]; // purposely allow `undefined`
 
-           for (i = 0; i < bindings.length; i++) {
-             binding = bindings[i];
-             if (!binding.event.modifiers.shiftKey) continue; // no shift
+             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);
+                 }
+               }
+             }
 
-             if (!!binding.capture !== isCapturing) continue;
+             var tagHash = key + '=' + value;
+             if (!tagCounts[tagHash]) tagCounts[tagHash] = 0;
+             tagCounts[tagHash] += 1;
+           });
+         });
 
-             if (matches(d3_event, binding, true)) {
-               binding.callback(d3_event);
-               didMatch = true; // match a max of one binding per event
+         for (var key in tags) {
+           if (!Array.isArray(tags[key])) continue; // sort values by frequency then alphabetically
 
-               break;
+           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]);
            }
 
-           if (didMatch) return; // then unshifted keybindings
+           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);
+         }
 
-           for (i = 0; i < bindings.length; i++) {
-             binding = bindings[i];
-             if (binding.event.modifiers.shiftKey) continue; // shift
+         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);
 
-             if (!!binding.capture !== isCapturing) continue;
+         while (++i < n) {
+           if (prefixes[i] + property in s) {
+             return prefixes[i] + property;
+           }
+         }
 
-             if (matches(d3_event, binding, false)) {
-               binding.callback(d3_event);
-               break;
+         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
              }
            }
+         }
 
-           function matches(d3_event, binding, testShift) {
-             var event = d3_event;
-             var isMatch = false;
-             var tryKeyCode = true; // Prefer a match on `KeyboardEvent.key`
+         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
 
-             if (event.key !== undefined) {
-               tryKeyCode = event.key.charCodeAt(0) > 255; // outside ISO-Latin-1
+       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);
+         }
 
-               isMatch = true;
+         return NaN;
+       }
 
-               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 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.
 
 
-             if (!isMatch && tryKeyCode) {
-               isMatch = event.keyCode === binding.event.keyCode;
-             }
+       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.
 
-             if (!isMatch) return false; // test modifier keys
+       function utilOldestID(ids) {
+         if (ids.length === 0) {
+           return undefined;
+         }
 
-             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;
-             }
+         var oldestIDIndex = 0;
+         var oldestID = toNumericID(ids[0]);
 
-             if (event.metaKey !== binding.event.modifiers.metaKey) return false;
-             if (testShift && event.shiftKey !== binding.event.modifiers.shiftKey) return false;
-             return true;
+         for (var i = 1; i < ids.length; i++) {
+           var num = toNumericID(ids[i]);
+
+           if (compareNumericIDs(oldestID, num) === 1) {
+             oldestIDIndex = i;
+             oldestID = num;
            }
          }
 
-         function capture(d3_event) {
-           testBindings(d3_event, true);
-         }
+         return ids[oldestIDIndex];
+       }
 
-         function bubble(d3_event) {
-           var tagName = select(d3_event.target).node().tagName;
+       function osmEntity(attrs) {
+         // For prototypal inheritance.
+         if (this instanceof osmEntity) return; // Create the appropriate subtype.
 
-           if (tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA') {
-             return;
-           }
+         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).
 
-           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()
+         return new osmEntity().initialize(arguments);
+       }
 
+       osmEntity.id = function (type) {
+         return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
+       };
 
-         keybinding.unbind = function (selection) {
-           _keybindings = [];
-           selection = selection || select(document);
-           selection.on('keydown.capture.' + namespace, null);
-           selection.on('keydown.bubble.' + namespace, null);
-           return keybinding;
-         };
+       osmEntity.id.next = {
+         changeset: -1,
+         node: -1,
+         way: -1,
+         relation: -1
+       };
 
-         keybinding.clear = function () {
-           _keybindings = {};
-           return keybinding;
-         }; // Remove one or more keycode bindings.
+       osmEntity.id.fromOSM = function (type, id) {
+         return type[0] + id;
+       };
 
+       osmEntity.id.toOSM = function (id) {
+         var match = id.match(/^[cnwr](-?\d+)$/);
 
-         keybinding.off = function (codes, capture) {
-           var arr = utilArrayUniq([].concat(codes));
+         if (match) {
+           return match[1];
+         }
 
-           for (var i = 0; i < arr.length; i++) {
-             var id = arr[i] + (capture ? '-capture' : '-bubble');
-             delete _keybindings[id];
-           }
+         return '';
+       };
 
-           return keybinding;
-         }; // Add one or more keycode bindings.
+       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().
 
 
-         keybinding.on = function (codes, callback, capture) {
-           if (typeof callback !== 'function') {
-             return keybinding.off(codes, capture);
-           }
+       osmEntity.key = function (entity) {
+         return entity.id + 'v' + (entity.v || 0);
+       };
 
-           var arr = utilArrayUniq([].concat(codes));
+       var _deprecatedTagValuesByKey;
 
-           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
+       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);
                  }
                }
-             };
-
-             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] = '+';
+         return _deprecatedTagValuesByKey;
+       };
 
-               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];
+       osmEntity.prototype = {
+         tags: {},
+         initialize: function initialize(sources) {
+           for (var i = 0; i < sources.length; ++i) {
+             var source = sources[i];
 
-                 if (matches[j] in utilKeybinding.keyCodes) {
-                   binding.event.keyCode = utilKeybinding.keyCodes[matches[j]];
+             for (var prop in source) {
+               if (Object.prototype.hasOwnProperty.call(source, prop)) {
+                 if (source[prop] === undefined) {
+                   delete this[prop];
+                 } else {
+                   this[prop] = source[prop];
                  }
                }
              }
            }
 
-           return keybinding;
-         };
+           if (!this.id && this.type) {
+             this.id = osmEntity.id(this.type);
+           }
 
-         return keybinding;
-       }
-       /*
-        * See https://github.com/keithamus/jwerty
-        */
+           if (!this.hasOwnProperty('visible')) {
+             this.visible = true;
+           }
 
-       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 (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);
+           }
 
-       var i$1 = 95,
-           n = 0;
+           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
 
-       while (++i$1 < 106) {
-         utilKeybinding.keyCodes['num-' + n] = i$1;
-         ++n;
-       } // 0-9
+           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
 
-       i$1 = 47;
-       n = 0;
+               if (hasExistingValues) return;
+             }
 
-       while (++i$1 < 58) {
-         utilKeybinding.keyCodes[n] = i$1;
-         ++n;
-       } // F1-F25
+             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;
+                   }
+                 }
+               }
 
-       i$1 = 111;
-       n = 1;
+               return false;
+             });
 
-       while (++i$1 < 136) {
-         utilKeybinding.keyCodes['f' + n] = i$1;
-         ++n;
-       } // a-z
+             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
 
-       i$1 = 64;
+         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
 
-       while (++i$1 < 91) {
-         utilKeybinding.keyCodes[String.fromCharCode(i$1).toLowerCase()] = i$1;
+         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 utilObjectOmit(obj, omitKeys) {
-         return Object.keys(obj).reduce(function (result, key) {
-           if (omitKeys.indexOf(key) === -1) {
-             result[key] = obj[key]; // keep
-           }
+       function getLaneCount(tags, isOneWay) {
+         var count;
 
-           return result;
-         }, {});
-       }
+         if (tags.lanes) {
+           count = parseInt(tags.lanes, 10);
 
-       // Copies a variable number of methods from source to target.
-       function utilRebind(target, source) {
-         var i = 1,
-             n = arguments.length,
-             method;
+           if (count > 0) {
+             return count;
+           }
+         }
 
-         while (++i < n) {
-           target[method = arguments[i]] = d3_rebind(target, source, source[method]);
+         switch (tags.highway) {
+           case 'trunk':
+           case 'motorway':
+             count = isOneWay ? 2 : 4;
+             break;
+
+           default:
+             count = isOneWay ? 1 : 2;
+             break;
          }
 
-         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.
+         return count;
+       }
 
-       function d3_rebind(target, source, method) {
-         return function () {
-           var value = method.apply(source, arguments);
-           return value === source ? target : value;
-         };
+       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);
        }
 
-       // 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 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;
 
-         function renew() {
-           var expires = new Date();
-           expires.setSeconds(expires.getSeconds() + 5);
-           document.cookie = name + '=1; expires=' + expires.toUTCString() + '; sameSite=strict';
+         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;
+           }
+
+           forward = laneCount - bothways - backward;
+         } else if (isNaN(backward)) {
+           if (forward > laneCount - bothways) {
+             forward = laneCount - bothways;
+           }
+
+           backward = laneCount - bothways - forward;
          }
 
-         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;
+         return {
+           forward: forward,
+           backward: backward,
+           bothways: bothways
          };
+       }
 
-         mutex.unlock = function () {
-           if (!intervalID) return;
-           document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 GMT; sameSite=strict';
-           clearInterval(intervalID);
-           intervalID = null;
-         };
+       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;
+           });
+         });
+       }
 
-         mutex.locked = function () {
-           return !!intervalID;
-         };
+       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;
+         });
+       }
 
-         return mutex;
+       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 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 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 clamp(num, min, max) {
-           return Math.max(min, Math.min(num, max));
+       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;
+           });
          }
 
-         function nearNullIsland(tile) {
-           var x = tile[0];
-           var y = tile[1];
-           var z = tile[2];
+         if (data.backward) {
+           data.backward.forEach(function (l, i) {
+             if (!lanesObj.backward[i]) lanesObj.backward[i] = {};
+             lanesObj.backward[i][key] = l;
+           });
+         }
 
-           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;
-           }
+         if (data.unspecified) {
+           data.unspecified.forEach(function (l, i) {
+             if (!lanesObj.unspecified[i]) lanesObj.unspecified[i] = {};
+             lanesObj.unspecified[i][key] = l;
+           });
+         }
+       }
 
-           return false;
+       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();
 
-         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 = [];
+             for (var i = 0; i < this.nodes.length; i++) {
+               var node = resolver.hasEntity(this.nodes[i]);
 
-           for (var i = 0; i < rows.length; i++) {
-             var y = rows[i];
+               if (node) {
+                 extent._extend(node.extent());
+               }
+             }
 
-             for (var j = 0; j < cols.length; j++) {
-               var x = cols[j];
+             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 (i >= _margin && i <= rows.length - _margin && j >= _margin && j <= cols.length - _margin) {
-                 tiles.unshift([x, y, z0]); // tiles in view at beginning
+
+           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
+             }
+           };
+
+           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;
+             }
+           }
+
+           return null;
+         },
+         isOneWay: function isOneWay() {
+           // explicit oneway tag..
+           var values = {
+             'yes': true,
+             '1': true,
+             '-1': true,
+             'reversible': true,
+             'alternating': true,
+             'no': false,
+             '0': false
+           };
+
+           if (values[this.tags.oneway] !== undefined) {
+             return values[this.tags.oneway];
+           } // implied oneway tag..
+
+
+           for (var key in this.tags) {
+             if (key in osmOneWayTags && this.tags[key] in osmOneWayTags[key]) {
+               return true;
+             }
+           }
+
+           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];
+
+             if (key in osmRightSideIsInsideTags && value in osmRightSideIsInsideTags[key]) {
+               if (osmRightSideIsInsideTags[key][value] === true) {
+                 return key;
                } else {
-                 tiles.push([x, y, z0]); // tiles in margin at the end
+                 // 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];
                }
              }
            }
 
-           tiles.translate = origin;
-           tiles.scale = k;
-           return tiles;
-         }
-         /**
-          * getTiles() returns an array of tiles that cover the map view
-          */
+           return null;
+         },
+         isSided: function isSided() {
+           if (this.tags.two_sided === 'yes') {
+             return false;
+           }
+
+           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;
 
+           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;
 
-         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)) {
+             if (curr === 0) {
+               continue;
+             } else if (prev && curr !== prev) {
                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
-          */
+             prev = curr;
+           }
 
+           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;
+             }
+           }
 
-         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 false;
+         },
+         geometry: function geometry(graph) {
+           return graph["transient"](this, 'geometry', function () {
+             return this.isArea() ? 'area' : 'line';
            });
-           return {
-             type: 'FeatureCollection',
-             features: features
-           };
-         };
-
-         tiler.tileSize = function (val) {
-           if (!arguments.length) return _tileSize;
-           _tileSize = val;
-           return tiler;
-         };
+         },
+         // 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])]]);
+           }
 
-         tiler.zoomExtent = function (val) {
-           if (!arguments.length) return _zoomExtent;
-           _zoomExtent = val;
-           return tiler;
-         };
+           return graph["transient"](this, 'segments', function () {
+             var segments = [];
 
-         tiler.size = function (val) {
-           if (!arguments.length) return _size;
-           _size = val;
-           return tiler;
-         };
+             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
+               });
+             }
 
-         tiler.scale = function (val) {
-           if (!arguments.length) return _scale;
-           _scale = val;
-           return tiler;
-         };
+             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..
 
-         tiler.translate = function (val) {
-           if (!arguments.length) return _translate;
-           _translate = val;
-           return tiler;
-         }; // number to extend the rows/columns beyond those covering the viewport
+           while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+             nodes.splice(i, 1);
+             i = nodes.length - 1;
+           }
 
+           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;
 
-         tiler.margin = function (val) {
-           if (!arguments.length) return _margin;
-           _margin = +val;
-           return tiler;
-         };
+           if (index === undefined) {
+             index = max;
+           }
 
-         tiler.skipNullIsland = function (val) {
-           if (!arguments.length) return _skipNullIsland;
-           _skipNullIsland = val;
-           return tiler;
-         };
+           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..
 
-         return tiler;
-       }
 
-       function utilTriggerEvent(target, type) {
-         target.each(function () {
-           var evt = document.createEvent('HTMLEvents');
-           evt.initEvent(type, true, true);
-           this.dispatchEvent(evt);
-         });
-       }
+           if (isClosed) {
+             var connector = this.first(); // leading connectors..
 
-       var _mainLocalizer = coreLocalizer(); // singleton
+             var i = 1;
 
+             while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+               nodes.splice(i, 1);
+               if (index > i) index--;
+             } // trailing connectors..
 
-       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: {…} },
-         // …
-         // }
+             i = nodes.length - 1;
 
-         var _dataLocales = {}; // `localeStrings` is an object containing all _loaded_ locale codes -> string data.
-         // {
-         // en: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
-         // de: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
-         // …
-         // }
+             while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+               nodes.splice(i, 1);
+               if (index > i) index--;
+               i = nodes.length - 1;
+             }
+           }
 
-         var _localeStrings = {}; // the current locale
+           nodes.splice(index, 0, id);
+           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-         var _localeCode = 'en-US'; // `_localeCodes` must contain `_localeCode` first, optionally followed by fallbacks
+           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+             nodes.push(nodes[0]);
+           }
 
-         var _localeCodes = ['en-US', 'en'];
-         var _languageCode = 'en';
-         var _textDirection = 'ltr';
-         var _usesMetric = false;
-         var _languageNames = {};
-         var _scriptNames = {}; // getters for the current locale parameters
+           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;
 
-         localizer.localeCode = function () {
-           return _localeCode;
-         };
+           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..
 
-         localizer.localeCodes = function () {
-           return _localeCodes;
-         };
 
-         localizer.languageCode = function () {
-           return _languageCode;
-         };
+           if (isClosed) {
+             var connector = this.first(); // leading connectors..
 
-         localizer.textDirection = function () {
-           return _textDirection;
-         };
+             var i = 1;
 
-         localizer.usesMetric = function () {
-           return _usesMetric;
-         };
+             while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+               nodes.splice(i, 1);
+               if (index > i) index--;
+             } // trailing connectors..
 
-         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
+             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
 
-         var _preferredLocaleCodes = [];
+               i = nodes.length - 1;
+             }
+           }
 
-         localizer.preferredLocaleCodes = function (codes) {
-           if (!arguments.length) return _preferredLocaleCodes;
+           nodes.splice(index, 1, id);
+           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-           if (typeof codes === 'string') {
-             // be generous and accept delimited strings as input
-             _preferredLocaleCodes = codes.split(/,|;| /gi).filter(Boolean);
-           } else {
-             _preferredLocaleCodes = codes;
+           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+             nodes.push(nodes[0]);
            }
 
-           return localizer;
-         };
+           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();
 
-         var _loadPromise;
+           for (var i = 0; i < nodes.length; i++) {
+             if (nodes[i] === needleID) {
+               nodes[i] = replacementID;
+             }
+           }
 
-         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']);
+           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
+
+           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+             nodes.push(nodes[0]);
+           }
 
-             _localeCodes = localesToUseFrom(requestedLocales); // Run iD in the highest-priority locale; the rest are fallbacks
+           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..
 
-             _localeCode = _localeCodes[0]; // Will always return the index for `en` if nothing else
+           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+             nodes.push(nodes[0]);
+           }
 
-             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
+           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)
+             }
+           };
 
+           if (changeset_id) {
+             r.way['@changeset'] = changeset_id;
+           }
 
-             var loadStringsPromises = _localeCodes.slice(0, fullCoverageIndex + 1).map(function (code) {
-               return localizer.loadLocale(code);
+           return r;
+         },
+         asGeoJSON: function asGeoJSON(resolver) {
+           return resolver["transient"](this, 'GeoJSON', function () {
+             var coordinates = resolver.childNodes(this).map(function (n) {
+               return n.loc;
              });
 
-             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
-
+             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;
+               })]
+             };
 
-         function localesToUseFrom(requestedLocales) {
-           var supportedLocales = _dataLocales;
-           var toUse = [];
+             if (!this.isClosed() && nodes.length) {
+               json.coordinates[0].push(nodes[0].loc);
+             }
 
-           for (var i in requestedLocales) {
-             var locale = requestedLocales[i];
-             if (supportedLocales[locale]) toUse.push(locale);
+             var area = d3_geoArea(json); // Heuristic for detecting counterclockwise winding order. Assumes
+             // that OpenStreetMap polygons are not hemisphere-spanning.
 
-             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 (area > 2 * Math.PI) {
+               json.coordinates[0] = json.coordinates[0].reverse();
+               area = d3_geoArea(json);
              }
-           } // remove duplicates
-
 
-           return utilArrayUniq(toUse);
+             return isNaN(area) ? 0 : area;
+           });
          }
+       }); // Filter function to eliminate consecutive duplicates.
 
-         function updateForCurrentLocale() {
-           if (!_localeCode) return;
-           _languageCode = _localeCode.split('-')[0];
-           var currentData = _dataLocales[_localeCode] || _dataLocales[_languageCode];
-           var hash = utilStringQs(window.location.hash);
+       function noRepeatNodes(node, i, arr) {
+         return i === 0 || node !== arr[i - 1];
+       }
 
-           if (hash.rtl === 'true') {
-             _textDirection = 'rtl';
-           } else if (hash.rtl === 'false') {
-             _textDirection = 'ltr';
-           } else {
-             _textDirection = currentData && currentData.rtl ? 'rtl' : 'ltr';
-           }
+       //
+       // 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 locale = _localeCode;
-           if (locale.toLowerCase() === 'en-us') locale = 'en';
-           _languageNames = _localeStrings[locale].languageNames;
-           _scriptNames = _localeStrings[locale].scriptNames;
-           _usesMetric = _localeCode.slice(-3).toLowerCase() !== '-us';
+       function osmOldMultipolygonOuterMemberOfRelation(entity, graph) {
+         if (entity.type !== 'relation' || !entity.isMultipolygon() || Object.keys(entity.tags).filter(osmIsInterestingTag).length > 1) {
+           return false;
          }
-         /* Locales */
-         // Returns a Promise to load the strings for the requested locale
-
-
-         localizer.loadLocale = function (requested) {
-           if (!_dataLocales) {
-             return Promise.reject('loadLocale called before init');
-           }
-
-           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));
-           }
-
-           if (_localeStrings[locale]) {
-             // already loaded
-             return Promise.resolve(locale);
-           }
 
-           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;
-           });
-         };
+         var outerMember;
 
-         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 (var memberIndex in entity.members) {
+           var member = entity.members[memberIndex];
 
+           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);
 
-         function pluralRule(number, localeCode) {
-           // modern browsers have this functionality built-in
-           var rules = 'Intl' in window && Intl.PluralRules && new Intl.PluralRules(localeCode);
+             if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
+               return false;
+             }
+           }
+         }
 
-           if (rules) {
-             return rules.select(number);
-           } // fallback to basic one/other, as in English
+         return outerMember;
+       } // For fixing up rendering of multipolygons with tags on the outer member.
+       // https://github.com/openstreetmap/iD/issues/613
 
+       function osmIsOldMultipolygonOuterMember(entity, graph) {
+         if (entity.type !== 'way' || Object.keys(entity.tags).filter(osmIsInterestingTag).length === 0) {
+           return false;
+         }
 
-           if (number === 1) return 'one';
-           return 'other';
+         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;
          }
-         /**
-         * 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
-         */
 
+         var members = parent.members,
+             member;
 
-         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
+         for (var i = 0; i < members.length; i++) {
+           member = members[i];
 
-           if (stringsKey.toLowerCase() === 'en-us') stringsKey = 'en';
-           var result = _localeStrings[stringsKey];
+           if (member.id === entity.id && member.role && member.role !== 'outer') {
+             // Not outer member
+             return false;
+           }
 
-           while (result !== undefined && path.length) {
-             result = result[path.pop()];
+           if (member.id !== entity.id && (!member.role || member.role === 'outer')) {
+             // Not a simple multipolygon
+             return false;
            }
+         }
 
-           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';
-                 });
+         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 (number !== undefined) {
-                   var rule = pluralRule(number, locale);
+         if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) {
+           return false;
+         }
 
-                   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];
-                   }
-                 }
-               }
+         var members = parent.members,
+             member,
+             outerMember;
 
-               if (typeof result === 'string') {
-                 for (var key in replacements) {
-                   var value = replacements[key];
+         for (var i = 0; i < members.length; i++) {
+           member = members[i];
 
-                   if (typeof value === 'number' && value.toLocaleString) {
-                     // format numbers for the locale
-                     value = value.toLocaleString(locale, {
-                       style: 'decimal',
-                       useGrouping: true,
-                       minimumFractionDigits: 0
-                     });
-                   }
+           if (!member.role || member.role === 'outer') {
+             if (outerMember) return false; // Not a simple multipolygon
 
-                   var token = "{".concat(key, "}");
-                   var regex = new RegExp(token, 'g');
-                   result = result.replace(regex, value);
-                 }
-               }
-             }
+             outerMember = member;
+           }
+         }
 
-             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
+         if (!outerMember) return false;
+         var outerEntity = graph.hasEntity(outerMember.id);
 
+         if (!outerEntity || !Object.keys(outerEntity.tags).filter(osmIsInterestingTag).length) {
+           return false;
+         }
 
-           var index = _localeCodes.indexOf(locale);
+         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.
+       //
 
-           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);
-           }
+       function osmJoinWays(toJoin, graph) {
+         function resolve(member) {
+           return graph.childNodes(graph.entity(member.id));
+         }
 
-           if (replacements && 'default' in replacements) {
-             // Fallback to a default value if one is specified in `replacements`
-             return {
-               text: replacements["default"],
-               locale: null
-             };
-           }
+         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 missing = "Missing ".concat(locale, " translation: ").concat(stringId);
-           if (typeof console !== 'undefined') console.error(missing); // eslint-disable-line
 
-           return {
-             text: missing,
-             locale: 'en'
-           };
-         }; // Returns only the localized text, discarding the locale info
+         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 i;
+         var joinAsMembers = true;
 
-         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
+         for (i = 0; i < toJoin.length; i++) {
+           if (toJoin[i] instanceof osmWay) {
+             joinAsMembers = false;
+             break;
+           }
+         }
 
+         var sequences = [];
+         sequences.actions = [];
 
-         localizer.t.html = function (stringId, replacements, locale) {
-           var info = localizer.tInfo(stringId, replacements, locale); // text may be empty or undefined if `replacements.default` is
+         while (toJoin.length) {
+           // start a new sequence
+           var item = toJoin.shift();
+           var currWays = [item];
+           var currNodes = resolve(item).slice(); // add to it
 
-           return info.text ? localizer.htmlForLocalizedText(info.text, info.locale) : '';
-         };
+           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.htmlForLocalizedText = function (text, localeCode) {
-           return "<span class=\"localized-text\" lang=\"".concat(localeCode || 'unknown', "\">").concat(text, "</span>");
-         };
+             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.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 (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 (nodes[0] === end) {
+                 fn = currNodes.push; // join to end
 
-           if (options && options.localOnly) return null;
-           var langInfo = _dataLanguages[code];
+                 nodes = nodes.slice(1);
+                 break;
+               } else if (nodes[nodes.length - 1] === end) {
+                 fn = currNodes.push; // join to end
 
-           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
+                 nodes = nodes.slice(0, -1).reverse();
+                 item = reverse(item);
+                 break;
+               } else if (nodes[nodes.length - 1] === start) {
+                 fn = currNodes.unshift; // join to beginning
 
-               if (_languageNames[base]) {
-                 // base language name in locale language
-                 var scriptCode = langInfo.script;
-                 var script = _scriptNames[scriptCode] || scriptCode; // e.g. "Serbian (Cyrillic)"
+                 nodes = nodes.slice(0, -1);
+                 break;
+               } else if (nodes[0] === start) {
+                 fn = currNodes.unshift; // join to beginning
 
-                 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
-                 });
+                 nodes = nodes.slice(1).reverse();
+                 item = reverse(item);
+                 break;
+               } else {
+                 fn = nodes = null;
                }
              }
+
+             if (!nodes) {
+               // couldn't find a joinable way/member
+               break;
+             }
+
+             fn.apply(currWays, [item]);
+             fn.apply(currNodes, nodes);
+             toJoin.splice(i, 1);
            }
 
-           return code; // if not found, use the code
-         };
+           currWays.nodes = currNodes;
+           sequences.push(currWays);
+         }
 
-         return localizer;
+         return sequences;
        }
 
-       // `presetCollection` is a wrapper around an `Array` of presets `collection`,
-       // and decorated with some extra methods for searching and matching geometry
-       //
+       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.
 
-       function presetCollection(collection) {
-         var MAXRESULTS = 50;
-         var _this = {};
-         var _memo = {};
-         _this.collection = collection;
+           var isPTv2 = /stop|platform/.test(member.role);
 
-         _this.item = function (id) {
-           if (_memo[id]) return _memo[id];
+           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 found = _this.collection.find(function (d) {
-             return d.id === id;
-           });
+             graph = graph.replace(relation.addMember(member, memberIndex));
+           }
 
-           if (found) _memo[id] = found;
-           return found;
-         };
+           return graph;
+         }; // Add a way member into the relation "wherever it makes sense".
+         // In this situation we were not supplied a memberIndex.
 
-         _this.index = function (id) {
-           return _this.collection.findIndex(function (d) {
-             return d.id === id;
-           });
-         };
+         function addWayMember(relation, graph) {
+           var groups, tempWay, insertPairIsReversed, item, i, j, k; // remove PTv2 stops and platforms before doing anything.
 
-         _this.matchGeometry = function (geometry) {
-           return presetCollection(_this.collection.filter(function (d) {
-             return d.matchGeometry(geometry);
-           }));
-         };
+           var PTv2members = [];
+           var members = [];
 
-         _this.matchAllGeometry = function (geometries) {
-           return presetCollection(_this.collection.filter(function (d) {
-             return d && d.matchAllGeometry(geometries);
-           }));
-         };
+           for (i = 0; i < relation.members.length; i++) {
+             var m = relation.members[i];
 
-         _this.matchAnyGeometry = function (geometries) {
-           return presetCollection(_this.collection.filter(function (d) {
-             return geometries.some(function (geom) {
-               return d.matchGeometry(geom);
-             });
-           }));
-         };
+             if (/stop|platform/.test(m.role)) {
+               PTv2members.push(m);
+             } else {
+               members.push(m);
+             }
+           }
 
-         _this.fallback = function (geometry) {
-           var id = geometry;
-           if (id === 'vertex') id = 'point';
-           return _this.item(id);
-         };
+           relation = relation.update({
+             members: members
+           });
 
-         _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")
+           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.)
 
-           function leading(a) {
-             var index = a.indexOf(value);
-             return index === 0 || a[index - 1] === ' ';
-           } // match at name beginning only
+             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);
+           }
 
+           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
 
-           function leadingStrict(a) {
-             var index = a.indexOf(value);
-             return index === 0;
-           }
+           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
 
-           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
+             for (j = 0; j < members.length; j++) {
+               if (members[j].index === startIndex) {
+                 break;
+               }
+             } // k = each member in segment
 
-             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 (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
 
-             i = aCompare.indexOf(value) - bCompare.indexOf(value);
-             if (i !== 0) return i; // priority for shorter preset names
+               if (tempWay && item.id === tempWay.id) {
+                 var reverse = nodes[0].id !== insertPair.nodes[0] ^ insertPairIsReversed;
 
-             return aCompare.length - bCompare.length;
-           }
+                 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
 
-           var pool = _this.collection;
 
-           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;
-             });
+               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);
+             }
            }
 
-           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 (tempWay) {
+             graph = graph.remove(tempWay);
+           } // Final pass: skip dead items, split pairs, remove index properties
 
-           var leading_name = searchable.filter(function (a) {
-             return leading(a.name().toLowerCase());
-           }).sort(sortNames); // matches value to preset suggestion name (original name is unhyphenated)
 
-           var leading_suggestions = suggestions.filter(function (a) {
-             return leadingStrict(a.originalName.toLowerCase());
-           }).sort(sortNames); // matches value to preset.terms values
+           var wayMembers = [];
 
-           var leading_terms = searchable.filter(function (a) {
-             return (a.terms() || []).some(leading);
-           }); // matches value to preset.tags values
+           for (i = 0; i < members.length; i++) {
+             item = members[i];
+             if (item.index === -1) continue;
 
-           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
+             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
 
-           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)
 
-           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 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
+           //
 
-           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);
+           function moveMember(arr, findIndex, toIndex) {
+             var i;
 
-           if (geometry) {
-             if (typeof geometry === 'string') {
-               results.push(_this.fallback(geometry));
-             } else {
-               geometry.forEach(function (geom) {
-                 return results.push(_this.fallback(geom));
-               });
+             for (i = 0; i < arr.length; i++) {
+               if (arr[i].index === findIndex) {
+                 break;
+               }
              }
-           }
 
-           return presetCollection(utilArrayUniq(results));
-         };
+             var item = Object.assign({}, arr[i]); // shallow copy
 
-         return _this;
-       }
+             arr[i].index = -1; // mark as dead
 
-       // `presetCategory` builds a `presetCollection` of member presets,
-       // decorated with some extra methods for searching and matching geometry
-       //
+             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
 
-       function presetCategory(categoryID, category, all) {
-         var _this = Object.assign({}, category); // shallow copy
 
+           function withIndex(arr) {
+             var result = new Array(arr.length);
 
-         _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];
+             for (var i = 0; i < arr.length; i++) {
+               result[i] = Object.assign({}, arr[i]); // shallow copy
 
-             if (acc.indexOf(geometry) === -1) {
-               acc.push(geometry);
+               result[i].index = i;
              }
-           }
-
-           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;
-         };
+             return result;
+           }
+         }
+       }
 
-         _this.name = function () {
-           return _t("presets.categories.".concat(categoryID, ".name"), {
-             'default': categoryID
-           });
-         };
+       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.
 
-         _this.nameLabel = function () {
-           return _t.html("presets.categories.".concat(categoryID, ".name"), {
-             'default': categoryID
+                 return;
+               }
+             }
            });
+           return graph;
          };
+       }
 
-         _this.terms = function () {
-           return [];
+       // 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));
          };
-
-         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;
+       function actionChangeMember(relationId, member, memberIndex) {
+         return function (graph) {
+           return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
          };
+       }
 
-         _this.matchAllGeometry = function (geometries) {
-           return !_this.geometry || geometries.every(function (geom) {
-             return _this.geometry.indexOf(geom) !== -1;
-           });
-         };
+       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
 
-         _this.t = function (scope, options) {
-           return _t("presets.fields.".concat(fieldID, ".").concat(scope), options);
+           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
+           }));
          };
+       }
 
-         _this.t.html = function (scope, options) {
-           return _t.html("presets.fields.".concat(fieldID, ".").concat(scope), options);
+       function actionChangeTags(entityId, tags) {
+         return function (graph) {
+           var entity = graph.entity(entityId);
+           return graph.replace(entity.update({
+             tags: tags
+           }));
          };
+       }
 
-         _this.title = function () {
-           return _this.overrideLabel || _this.t('label', {
-             'default': fieldID
+       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';
            });
-         };
-
-         _this.label = function () {
-           return _this.overrideLabel || _this.t.html('label', {
-             'default': fieldID
+         },
+         move: function move(loc) {
+           return this.update({
+             loc: loc
            });
-         };
-
-         var _placeholder = _this.placeholder;
+         },
+         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?
 
-         _this.placeholder = function () {
-           return _this.t('placeholder', {
-             'default': _placeholder
-           });
-         };
+           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
 
-         _this.originalTerms = (_this.terms || []).join();
+             var re = /:direction$/i;
+             var keys = Object.keys(this.tags);
 
-         _this.terms = function () {
-           return _this.t('terms', {
-             'default': _this.originalTerms
-           }).toLowerCase().trim().split(/\s*,+\s*/);
-         };
+             for (i = 0; i < keys.length; i++) {
+               if (re.test(keys[i])) {
+                 val = this.tags[keys[i]].toLowerCase();
+                 break;
+               }
+             }
+           }
 
-         _this.increment = _this.type === 'number' ? _this.increment || 1 : undefined;
-         return _this;
-       }
+           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
 
-       // `Array.prototype.lastIndexOf` method
-       // https://tc39.es/ecma262/#sec-array.prototype.lastindexof
-       _export({ target: 'Array', proto: true, forced: arrayLastIndexOf !== [].lastIndexOf }, {
-         lastIndexOf: arrayLastIndexOf
-       });
 
-       // `presetPreset` decorates a given `preset` Object
-       // with some extra methods for searching and matching geometry
-       //
+             if (v !== '' && !isNaN(+v)) {
+               results.push(+v);
+               return;
+             } // string direction - inspect parent ways
 
-       function presetPreset(presetID, preset, addable, allFields, allPresets) {
-         allFields = allFields || {};
-         allPresets = allPresets || {};
 
-         var _this = Object.assign({}, preset); // shallow copy
+             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;
 
+               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
+                   }
 
-         var _addable = addable || false;
+                   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);
 
-         var _resolvedFields; // cache
+             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();
 
+               if (way.isClosed()) {
+                 nodes.pop();
+               } // ignore connecting node if closed
+               // return true if vertex appears multiple times (way is self intersecting)
 
-         var _resolvedMoreFields; // cache
 
+               return nodes.indexOf(this.id) !== nodes.lastIndexOf(this.id);
+             }
 
-         _this.id = presetID;
-         _this.safeid = utilSafeClassName(presetID); // for use in css classes, selectors, element ids
+             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
+           };
+         }
+       });
 
-         _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 actionCircularize(wayId, projection, maxAngle) {
+         maxAngle = (maxAngle || 20) * Math.PI / 180;
 
-         _this.fields = function () {
-           return _resolvedFields || (_resolvedFields = resolve('fields'));
-         };
+         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;
+           });
 
-         _this.moreFields = function () {
-           return _resolvedMoreFields || (_resolvedMoreFields = resolve('moreFields'));
-         };
+           if (!way.isConvex(graph)) {
+             graph = action.makeConvex(graph);
+           }
 
-         _this.resetFields = function () {
-           return _resolvedFields = _resolvedMoreFields = null;
-         };
+           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
 
-         _this.tags = _this.tags || {};
-         _this.addTags = _this.addTags || _this.tags;
-         _this.removeTags = _this.removeTags || _this.addTags;
-         _this.geometry = _this.geometry || [];
+           if (!keyNodes.length) {
+             keyNodes = [nodes[0]];
+             keyPoints = [points[0]];
+           }
 
-         _this.matchGeometry = function (geom) {
-           return _this.geometry.indexOf(geom) >= 0;
-         };
+           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.
 
-         _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 (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;
 
-           for (var k in tags) {
-             seen[k] = true;
+             if (indexRange < 0) {
+               indexRange += nodes.length;
+             } // position this key node
 
-             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 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
 
-           var addTags = _this.addTags;
+             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
 
-           for (var _k in addTags) {
-             if (!seen[_k] && entityTags[_k] === addTags[_k]) {
-               score += _this.originalScore;
+             if (totalAngle * sign > 0) {
+               totalAngle = -sign * (2 * Math.PI - Math.abs(totalAngle));
              }
-           }
-
-           return score;
-         };
-
-         _this.t = function (scope, options) {
-           var textID = "presets.presets.".concat(presetID, ".").concat(scope);
-           return _t(textID, options);
-         };
-
-         _this.t.html = function (scope, options) {
-           var textID = "presets.presets.".concat(presetID, ".").concat(scope);
-           return _t.html(textID, options);
-         };
 
-         _this.name = function () {
-           return _this.t('name', {
-             'default': _this.originalName
-           });
-         };
+             do {
+               numberNewPoints++;
+               eachAngle = totalAngle / (indexRange + numberNewPoints);
+             } while (Math.abs(eachAngle) > maxAngle); // move existing nodes
 
-         _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
+             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
 
-             return _t('presets.presets.' + path.join('/') + '.name');
-           }
 
-           return null;
-         };
+             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
 
-         _this.subtitleLabel = function () {
-           if (_this.suggestion) {
-             var path = presetID.split('/');
-             path.pop(); // remove brand name
+               var min = Infinity;
 
-             return _t.html('presets.presets.' + path.join('/') + '.name');
-           }
+               for (var nodeId in nearNodes) {
+                 var nearAngle = nearNodes[nodeId];
+                 var dist = Math.abs(nearAngle - angle);
 
-           return null;
-         };
+                 if (dist < min) {
+                   min = dist;
+                   origNode = origNodes[nodeId];
+                 }
+               }
 
-         _this.terms = function () {
-           return _this.t('terms', {
-             'default': _this.originalTerms
-           }).toLowerCase().trim().split(/\s*,+\s*/);
-         };
+               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..
 
-         _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;
-         };
+             if (indexRange === 1 && inBetweenNodes.length) {
+               var startIndex1 = way.nodes.lastIndexOf(startNode.id);
+               var endIndex1 = way.nodes.lastIndexOf(endNode.id);
+               var wayDirection1 = endIndex1 - startIndex1;
 
-         _this.reference = function () {
-           // Lookup documentation on Wikidata...
-           var qid = _this.tags.wikidata || _this.tags['brand:wikidata'] || _this.tags['operator:wikidata'];
+               if (wayDirection1 < -1) {
+                 wayDirection1 = 1;
+               }
 
-           if (qid) {
-             return {
-               qid: qid
-             };
-           } // Lookup documentation on OSM Wikibase...
+               var parentWays = graph.parentWays(keyNodes[i]);
 
+               for (j = 0; j < parentWays.length; j++) {
+                 var sharedWay = parentWays[j];
+                 if (sharedWay === way) continue;
 
-           var key = _this.originalReference.key || Object.keys(utilObjectOmit(_this.tags, 'name'))[0];
-           var value = _this.originalReference.value || _this.tags[key];
+                 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 (value === '*') {
-             return {
-               key: key
-             };
-           } else {
-             return {
-               key: key,
-               value: value
-             };
-           }
-         };
+                   if (wayDirection2 < -1) {
+                     wayDirection2 = 1;
+                   }
 
-         _this.unsetTags = function (tags, geometry, skipFieldDefaults) {
-           tags = utilObjectOmit(tags, Object.keys(_this.removeTags));
+                   if (wayDirection1 !== wayDirection2) {
+                     inBetweenNodes.reverse();
+                     insertAt = startIndex2;
+                   }
 
-           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 < inBetweenNodes.length; k++) {
+                     sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);
+                   }
+
+                   graph = graph.replace(sharedWay);
+                 }
                }
-             });
-           }
+             }
+           } // update the way to have all the new nodes
 
-           delete tags.area;
-           return tags;
-         };
 
-         _this.setTags = function (tags, geometry, skipFieldDefaults) {
-           var addTags = _this.addTags;
-           tags = Object.assign({}, tags); // shallow copy
+           ids = nodes.map(function (n) {
+             return n.id;
+           });
+           ids.push(ids[0]);
+           way = way.update({
+             nodes: ids
+           });
+           graph = graph.replace(way);
+           return graph;
+         };
 
-           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`)
+         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..
 
+           if (sign === -1) {
+             nodes.reverse();
+             points.reverse();
+           }
 
-           if (!addTags.hasOwnProperty('area')) {
-             delete tags.area;
+           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;
 
-             if (geometry === 'area') {
-               var needsAreaTag = true;
+             if (indexRange < 0) {
+               indexRange += nodes.length;
+             } // move interior nodes to the surface of the convex hull..
 
-               if (_this.geometry.indexOf('line') === -1) {
-                 for (var _k2 in addTags) {
-                   if (_k2 in osmAreaKeys) {
-                     needsAreaTag = false;
-                     break;
-                   }
-                 }
-               }
 
-               if (needsAreaTag) {
-                 tags.area = 'yes';
-               }
+             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);
              }
            }
 
-           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 graph;
+         };
 
-           return tags;
-         }; // For a preset without fields, use the fields of the parent preset.
-         // Replace {preset} placeholders with the fields of the specified presets.
+         action.disabled = function (graph) {
+           if (!graph.entity(wayId).isClosed()) {
+             return 'not_closed';
+           } //disable when already circular
 
 
-         function resolve(which) {
-           var fieldIDs = which === 'fields' ? _this.originalFields : _this.originalMoreFields;
-           var resolved = [];
-           fieldIDs.forEach(function (fieldID) {
-             var match = fieldID.match(/\{(.*)\}/);
+           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;
 
-             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 (hull.length !== points.length || hull.length < 3) {
+             return false;
+           }
 
-           if (!resolved.length) {
-             var endIndex = _this.id.lastIndexOf('/');
+           var centroid = d3_polygonCentroid(points);
+           var radius = geoVecLengthSquare(centroid, points[0]);
+           var i, actualPoint; // compare distances between centroid and points
 
-             var parentID = endIndex && _this.id.substring(0, endIndex);
+           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%)
 
-             if (parentID) {
-               resolved = inheritFields(parentID, which);
+             if (diff > 0.05 * radius) {
+               return false;
              }
-           }
+           } //check if central angles are smaller than maxAngle
 
-           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 [];
+           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;
 
-             if (which === 'fields') {
-               return parent.fields().filter(shouldInherit);
-             } else if (which === 'moreFields') {
-               return parent.moreFields();
-             } else {
-               return [];
+             if (angle < 0) {
+               angle = -angle;
              }
-           } // Skip `fields` for the keys which define the preset.
-           // These are usually `typeCombo` fields like `shop=*`
 
+             if (angle > Math.PI) {
+               angle = 2 * Math.PI - angle;
+             }
 
-           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 (angle > maxAngle + epsilonAngle) {
+               return false;
+             }
            }
-         }
-
-         return _this;
-       }
 
-       var _mainPresetIndex = presetIndex(); // singleton
-       // `presetIndex` wraps a `presetCollection`
-       // with methods for loading new data and returning defaults
-       //
+           return 'already_circular';
+         };
 
-       function presetIndex() {
-         var dispatch$1 = dispatch('favoritePreset', 'recentsChange');
-         var MAXRECENTS = 30; // seed the preset lists with geometry fallbacks
+         action.transitionable = true;
+         return action;
+       }
 
-         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
-         });
+       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
 
-         var _this = presetCollection([POINT, LINE, AREA, RELATION]);
+           if (geometries.point) return false; // delete if this node only be a vertex
 
-         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
+           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 _recents;
+           return !node.hasInterestingTags();
+         }
 
-         var _favorites; // Index of presets by (geometry, tag key).
+         var action = function action(graph) {
+           var way = graph.entity(wayID);
+           graph.parentRelations(way).forEach(function (parent) {
+             parent = parent.removeMembersWithID(wayID);
+             graph = graph.replace(parent);
 
+             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 _geometryIndex = {
-           point: {},
-           vertex: {},
-           line: {},
-           area: {},
-           relation: {}
+             if (canDeleteNode(node, graph)) {
+               graph = graph.remove(node);
+             }
+           });
+           return graph.remove(way);
          };
 
-         var _loadPromise;
+         return action;
+       }
 
-         _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 actionDeleteMultiple(ids) {
+         var actions = {
+           way: actionDeleteWay,
+           node: actionDeleteNode,
+           relation: actionDeleteRelation
+         };
 
-             osmSetAreaKeys(_this.areaKeys());
-             osmSetPointTags(_this.pointTags());
-             osmSetVertexTags(_this.vertexTags());
+         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.merge = function (d) {
-           // Merge Fields
-           if (d.fields) {
-             Object.keys(d.fields).forEach(function (fieldID) {
-               var f = d.fields[fieldID];
+         return action;
+       }
 
-               if (f) {
-                 // add or replace
-                 _fields[fieldID] = presetField(fieldID, f);
-               } else {
-                 // remove
-                 delete _fields[fieldID];
-               }
-             });
-           } // Merge Presets
+       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);
 
-           if (d.presets) {
-             Object.keys(d.presets).forEach(function (presetID) {
-               var p = d.presets[presetID];
+             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);
 
-               if (p) {
-                 // add or replace
-                 var isAddable = !_addablePresetIDs || _addablePresetIDs.has(presetID);
+             if (canDeleteEntity(entity, graph)) {
+               graph = actionDeleteMultiple([memberID])(graph);
+             }
+           });
+           return graph.remove(relation);
+         };
 
-                 _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 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);
 
+             if (parent.isDegenerate()) {
+               graph = actionDeleteWay(parent.id)(graph);
+             }
+           });
+           graph.parentRelations(node).forEach(function (parent) {
+             parent = parent.removeMembersWithID(nodeId);
+             graph = graph.replace(parent);
 
-           _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Categories
+             if (parent.isDegenerate()) {
+               graph = actionDeleteRelation(parent.id)(graph);
+             }
+           });
+           return graph.remove(node);
+         };
 
-           if (d.categories) {
-             Object.keys(d.categories).forEach(function (categoryID) {
-               var c = d.categories[categoryID];
+         return action;
+       }
 
-               if (c) {
-                 // add or replace
-                 _categories[categoryID] = presetCategory(categoryID, c, _this);
-               } else {
-                 // remove
-                 delete _categories[categoryID];
-               }
-             });
-           } // Rebuild _this.collection after loading categories
+       //
+       // 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
+       //
 
+       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.
 
-           _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Defaults
+           nodeIDs.reverse();
+           var interestingIDs = [];
 
-           if (d.defaults) {
-             Object.keys(d.defaults).forEach(function (geometry) {
-               var def = d.defaults[geometry];
+           for (i = 0; i < nodeIDs.length; i++) {
+             node = graph.entity(nodeIDs[i]);
 
-               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];
+             if (node.hasInterestingTags()) {
+               if (!node.isNew()) {
+                 interestingIDs.push(node.id);
                }
-             });
-           } // Rebuild universal fields array
+             }
+           }
 
+           survivor = graph.entity(utilOldestID(interestingIDs.length > 0 ? interestingIDs : nodeIDs)); // Replace all non-surviving nodes with the survivor and merge tags.
 
-           _universal = Object.values(_fields).filter(function (field) {
-             return field.universal;
-           }); // Reset all the preset fields - they'll need to be resolved again
+           for (i = 0; i < nodeIDs.length; i++) {
+             node = graph.entity(nodeIDs[i]);
+             if (node.id === survivor.id) continue;
+             parents = graph.parentWays(node);
 
-           Object.values(_presets).forEach(function (preset) {
-             return preset.resetFields();
-           }); // Rebuild geometry index
+             for (j = 0; j < parents.length; j++) {
+               graph = graph.replace(parents[j].replaceNode(node.id, survivor.id));
+             }
 
-           _geometryIndex = {
-             point: {},
-             vertex: {},
-             line: {},
-             area: {},
-             relation: {}
-           };
+             parents = graph.parentRelations(node);
 
-           _this.collection.forEach(function (preset) {
-             (preset.geometry || []).forEach(function (geometry) {
-               var g = _geometryIndex[geometry];
+             for (j = 0; j < parents.length; j++) {
+               graph = graph.replace(parents[j].replaceMember(node, survivor));
+             }
 
-               for (var key in preset.tags) {
-                 (g[key] = g[key] || []).push(preset);
-               }
-             });
-           });
+             survivor = survivor.mergeTags(node.tags);
+             graph = actionDeleteNode(node.id)(graph);
+           }
 
-           return _this;
-         };
+           graph = graph.replace(survivor); // find and delete any degenerate ways created by connecting adjacent vertices
 
-         _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
+           parents = graph.parentWays(survivor);
 
-             if (geometry === 'vertex' && entity.isOnAddressLine(resolver)) {
-               geometry = 'point';
+           for (i = 0; i < parents.length; i++) {
+             if (parents[i].isDegenerate()) {
+               graph = actionDeleteWay(parents[i].id)(graph);
              }
+           }
 
-             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.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.
+
+           survivor = graph.entity(utilOldestID(nodeIDs)); // 1. disable if the nodes being connected have conflicting relation roles
 
-           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 (i = 0; i < nodeIDs.length; i++) {
+             node = graph.entity(nodeIDs[i]);
+             relations = graph.parentRelations(node);
 
-             var keyMatches = geometryMatches[k];
-             if (!keyMatches) continue;
+             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
 
-             for (var i = 0; i < keyMatches.length; i++) {
-               var score = keyMatches[i].matchScore(tags);
+               if (relation.hasFromViaTo()) {
+                 restrictionIDs.push(relation.id);
+               }
 
-               if (score > best) {
-                 best = score;
-                 match = keyMatches[i];
+               if (seen[relation.id] !== undefined && seen[relation.id] !== role) {
+                 return 'relation';
+               } else {
+                 seen[relation.id] = role;
                }
              }
-           }
-
-           if (address && (!match || match.isFallback())) {
-             match = address;
-           }
+           } // gather restrictions for parent ways
 
-           return match || _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
+           for (i = 0; i < nodeIDs.length; i++) {
+             node = graph.entity(nodeIDs[i]);
+             var parents = graph.parentWays(node);
 
-             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.
+             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];
 
-         _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 (relation.hasFromViaTo()) {
+                   restrictionIDs.push(relation.id);
+                 }
+               }
+             }
+           } // test restrictions
 
-           var presets = _this.collection.filter(function (p) {
-             return !p.suggestion && !p.replacement;
-           }); // keeplist
 
+           restrictionIDs = utilArrayUniq(restrictionIDs);
 
-           presets.forEach(function (p) {
-             var keys = p.tags && Object.keys(p.tags);
-             var key = keys && keys.length && keys[0]; // pick the first tag
+           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)
 
-             if (!key) return;
-             if (ignore.indexOf(key) !== -1) return;
+             var nodes = {
+               from: [],
+               via: [],
+               to: [],
+               keyfrom: [],
+               keyto: []
+             };
 
-             if (p.geometry.indexOf('area') !== -1) {
-               // probably an area..
-               areaKeys[key] = areaKeys[key] || {};
+             for (j = 0; j < relation.members.length; j++) {
+               collectNodes(relation.members[j], nodes);
              }
-           }); // discardlist
 
-           presets.forEach(function (p) {
-             var key;
+             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 (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];
+             for (j = 0; j < nodeIDs.length; j++) {
+               var n = nodeIDs[j];
 
-               if (key in areaKeys && // probably an area...
-               p.geometry.indexOf('line') !== -1 && // but sometimes a line
-               value !== '*') {
-                 areaKeys[key][value] = true;
+               if (nodes.from.indexOf(n) !== -1) {
+                 connectFrom = 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
+               if (nodes.via.indexOf(n) !== -1) {
+                 connectVia = true;
+               }
 
-             var keys = d.tags && Object.keys(d.tags);
-             var key = keys && keys.length && keys[0]; // pick the first tag
+               if (nodes.to.indexOf(n) !== -1) {
+                 connectTo = true;
+               }
 
-             if (!key) return pointTags; // if this can be a point
+               if (nodes.keyfrom.indexOf(n) !== -1) {
+                 connectKeyFrom = true;
+               }
 
-             if (d.geometry.indexOf('point') !== -1) {
-               pointTags[key] = pointTags[key] || {};
-               pointTags[key][d.tags[key]] = true;
+               if (nodes.keyto.indexOf(n) !== -1) {
+                 connectKeyTo = true;
+               }
              }
 
-             return pointTags;
-           }, {});
-         };
+             if (connectFrom && connectTo && !isUturn) {
+               return 'restriction';
+             }
 
-         _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
+             if (connectFrom && connectVia) {
+               return 'restriction';
+             }
 
-             var keys = d.tags && Object.keys(d.tags);
-             var key = keys && keys.length && keys[0]; // pick the first tag
+             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.
 
-             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;
-             }
+             if (connectKeyFrom || connectKeyTo) {
+               if (nodeIDs.length !== 2) {
+                 return 'restriction';
+               }
 
-             return vertexTags;
-           }, {});
-         };
+               var n0 = null;
+               var n1 = null;
 
-         _this.field = function (id) {
-           return _fields[id];
-         };
+               for (j = 0; j < memberWays.length; j++) {
+                 way = memberWays[j];
 
-         _this.universal = function () {
-           return _universal;
-         };
+                 if (way.contains(nodeIDs[0])) {
+                   n0 = nodeIDs[0];
+                 }
 
-         _this.defaults = function (geometry, n, startWithRecents) {
-           var recents = [];
+                 if (way.contains(nodeIDs[1])) {
+                   n1 = nodeIDs[1];
+                 }
+               }
 
-           if (startWithRecents) {
-             recents = _this.recent().matchGeometry(geometry).collection.slice(0, 4);
-           }
+               if (n0 && n1) {
+                 // both nodes are part of the restriction
+                 var ok = false;
 
-           var defaults;
+                 for (j = 0; j < memberWays.length; j++) {
+                   way = memberWays[j];
 
-           if (_addablePresetIDs) {
-             defaults = Array.from(_addablePresetIDs).map(function (id) {
-               var preset = _this.item(id);
+                   if (way.areAdjacent(n0, n1)) {
+                     ok = true;
+                     break;
+                   }
+                 }
 
-               if (preset && preset.matchGeometry(geometry)) return preset;
-               return null;
-             }).filter(Boolean);
-           } else {
-             defaults = _defaults[geometry].collection.concat(_this.fallback(geometry));
-           }
+                 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)
 
-           return presetCollection(utilArrayUniq(recents.concat(defaults)).slice(0, n - 1));
-         }; // pass a Set of addable preset ids
 
+             for (j = 0; j < memberWays.length; j++) {
+               way = memberWays[j].update({}); // make copy
 
-         _this.addablePresetIDs = function (val) {
-           if (!arguments.length) return _addablePresetIDs; // accept and convert arrays
+               for (k = 0; k < nodeIDs.length; k++) {
+                 if (nodeIDs[k] === survivor.id) continue;
 
-           if (Array.isArray(val)) val = new Set(val);
-           _addablePresetIDs = val;
+                 if (way.areAdjacent(nodeIDs[k], survivor.id)) {
+                   way = way.removeNode(nodeIDs[k]);
+                 } else {
+                   way = way.replaceNode(nodeIDs[k], survivor.id);
+                 }
+               }
 
-           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);
-             });
+               if (way.isDegenerate()) {
+                 return 'restriction';
+               }
+             }
            }
 
-           return _this;
-         };
-
-         _this.recent = function () {
-           return presetCollection(utilArrayUniq(_this.getRecents().map(function (d) {
-             return d.preset;
-           })));
-         };
+           return false; // if a key node appears multiple times (indexOf !== lastIndexOf) it's a FROM-VIA or TO-VIA junction
 
-         function RibbonItem(preset, source) {
-           var item = {};
-           item.preset = preset;
-           item.source = source;
+           function hasDuplicates(n, i, arr) {
+             return arr.indexOf(n) !== arr.lastIndexOf(n);
+           }
 
-           item.isFavorite = function () {
-             return item.source === 'favorite';
-           };
+           function keyNodeFilter(froms, tos) {
+             return function (n) {
+               return froms.indexOf(n) === -1 && tos.indexOf(n) === -1;
+             };
+           }
 
-           item.isRecent = function () {
-             return item.source === 'recent';
-           };
+           function collectNodes(member, collection) {
+             var entity = graph.hasEntity(member.id);
+             if (!entity) return;
+             var role = member.role || '';
 
-           item.matches = function (preset) {
-             return item.preset.id === preset.id;
-           };
+             if (!collection[role]) {
+               collection[role] = [];
+             }
 
-           item.minified = function () {
-             return {
-               pID: item.preset.id
-             };
-           };
+             if (member.type === 'node') {
+               collection[role].push(member.id);
 
-           return item;
-         }
+               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);
 
-         function ribbonItemForMinified(d, source) {
-           if (d && d.pID) {
-             var preset = _this.item(d.pID);
+               if (role === 'from' || role === 'via') {
+                 collection.keyfrom.push(entity.first());
+                 collection.keyfrom.push(entity.last());
+               }
 
-             if (!preset) return null;
-             return RibbonItem(preset, source);
+               if (role === 'to' || role === 'via') {
+                 collection.keyto.push(entity.first());
+                 collection.keyto.push(entity.last());
+               }
+             }
            }
+         };
 
-           return null;
-         }
+         return action;
+       }
 
-         _this.getGenericRibbonItems = function () {
-           return ['point', 'line', 'area'].map(function (id) {
-             return RibbonItem(_this.item(id), 'generic');
+       function actionCopyEntities(ids, fromGraph) {
+         var _copies = {};
+
+         var action = function action(graph) {
+           ids.forEach(function (id) {
+             fromGraph.entity(id).copy(fromGraph, _copies);
            });
-         };
 
-         _this.getAddable = function () {
-           if (!_addablePresetIDs) return [];
-           return _addablePresetIDs.map(function (id) {
-             var preset = _this.item(id);
+           for (var id in _copies) {
+             graph = graph.replace(_copies[id]);
+           }
 
-             if (preset) return RibbonItem(preset, 'addable');
-             return null;
-           }).filter(Boolean);
+           return graph;
          };
 
-         function setRecents(items) {
-           _recents = items;
-           var minifiedItems = items.map(function (d) {
-             return d.minified();
-           });
-           corePreferences('preset_recents', JSON.stringify(minifiedItems));
-           dispatch$1.call('recentsChange');
-         }
+         action.copies = function () {
+           return _copies;
+         };
 
-         _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 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 _recents;
+           return graph;
          };
+       }
 
-         _this.addRecent = function (preset, besidePreset, after) {
-           var recents = _this.getRecents();
+       function actionDiscardTags(difference, discardTags) {
+         discardTags = discardTags || {};
+         return function (graph) {
+           difference.modified().forEach(checkTags);
+           difference.created().forEach(checkTags);
+           return graph;
 
-           var beforeItem = _this.recentMatching(besidePreset);
+           function checkTags(entity) {
+             var keys = Object.keys(entity.tags);
+             var didDiscard = false;
+             var tags = {};
 
-           var toIndex = recents.indexOf(beforeItem);
-           if (after) toIndex += 1;
-           var newItem = RibbonItem(preset, 'recent');
-           recents.splice(toIndex, 0, newItem);
-           setRecents(recents);
+             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];
+               }
+             }
+
+             if (didDiscard) {
+               graph = graph.replace(entity.update({
+                 tags: tags
+               }));
+             }
+           }
+         };
+       }
+
+       //
+       // 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;
+         var disconnectableRelationTypes = {
+           'associatedStreet': true,
+           'enforcement': true,
+           'site': true
+         };
+
+         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 (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;
          };
 
-         _this.removeRecent = function (preset) {
-           var item = _this.recentMatching(preset);
+         action.connections = function (graph) {
+           var candidates = [];
+           var keeping = false;
+           var parentWays = graph.parentWays(graph.entity(nodeId));
+           var way, waynode;
 
-           if (item) {
-             var items = _this.getRecents();
+           for (var i = 0; i < parentWays.length; i++) {
+             way = parentWays[i];
 
-             items.splice(items.indexOf(item), 1);
-             setRecents(items);
-           }
-         };
+             if (wayIds && wayIds.indexOf(way.id) === -1) {
+               keeping = true;
+               continue;
+             }
 
-         _this.recentMatching = function (preset) {
-           var items = _this.getRecents();
+             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 in items) {
-             if (items[i].matches(preset)) {
-               return items[i];
+                 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
+                   });
+                 }
+               }
              }
            }
 
-           return null;
+           return keeping ? candidates : candidates.slice(1);
          };
 
-         _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;
+         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;
+               }
+             });
+           });
+           if (sharedRelation) return 'relation';
          };
 
-         _this.moveRecent = function (item, beforeItem) {
-           var recents = _this.getRecents();
+         action.limitWays = function (val) {
+           if (!arguments.length) return wayIds;
+           wayIds = val;
+           return action;
+         };
 
-           var fromIndex = recents.indexOf(item);
-           var toIndex = recents.indexOf(beforeItem);
+         return action;
+       }
 
-           var items = _this.moveItem(recents, fromIndex, toIndex);
+       function actionExtract(entityID, projection) {
+         var extractedNodeID;
 
-           if (items) setRecents(items);
+         var action = function action(graph) {
+           var entity = graph.entity(entityID);
+
+           if (entity.type === 'node') {
+             return extractFromNode(entity, graph);
+           }
+
+           return extractFromWayOrRelation(entity, graph);
          };
 
-         _this.setMostRecent = function (preset) {
-           if (preset.searchable === false) return;
+         function extractFromNode(node, graph) {
+           extractedNodeID = node.id; // Create a new node to replace the one we will detach
 
-           var items = _this.getRecents();
+           var replacement = osmNode({
+             loc: node.loc
+           });
+           graph = graph.replace(replacement); // Process each way in turn, updating the graph as we go
 
-           var item = _this.recentMatching(preset);
+           graph = graph.parentWays(node).reduce(function (accGraph, parentWay) {
+             return accGraph.replace(parentWay.replaceNode(entityID, replacement.id));
+           }, graph); // Process any relations too
 
-           if (item) {
-             items.splice(items.indexOf(item), 1);
-           } else {
-             item = RibbonItem(preset, 'recent');
-           } // remove the last recent (first in, first out)
+           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'];
+           var extractedLoc = d3_geoPath(projection).centroid(entity.asGeoJSON(graph));
+           extractedLoc = extractedLoc && projection.invert(extractedLoc);
 
-           while (items.length >= MAXRECENTS) {
-             items.pop();
-           } // prepend array
+           if (!extractedLoc || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
+             extractedLoc = entity.extent(graph).center();
+           }
 
+           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
 
-           items.unshift(item);
-           setRecents(items);
-         };
+           var pointTags = {};
 
-         function setFavorites(items) {
-           _favorites = items;
-           var minifiedItems = items.map(function (d) {
-             return d.minified();
-           });
-           corePreferences('preset_favorites', JSON.stringify(minifiedItems)); // call update
+           for (var key in entityTags) {
+             if (entity.type === 'relation' && key === 'type') {
+               continue;
+             }
 
-           dispatch$1.call('favoritePreset');
-         }
+             if (keysToRetain.indexOf(key) !== -1) {
+               continue;
+             }
 
-         _this.addFavorite = function (preset, besidePreset, after) {
-           var favorites = _this.getFavorites();
+             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
 
-           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);
-         };
+             if (isIndoorArea && key === 'indoor') {
+               continue;
+             } // copy the tag from the entity to the point
 
-         _this.toggleFavorite = function (preset) {
-           var favs = _this.getFavorites();
 
-           var favorite = _this.favoriteMatching(preset);
+             pointTags[key] = entityTags[key]; // leave addresses and some other tags so they're on both features
 
-           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
+             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
 
 
-             favs.push(RibbonItem(preset, 'favorite'));
+             delete entityTags[key];
            }
 
-           setFavorites(favs);
-         };
-
-         _this.removeFavorite = function (preset) {
-           var item = _this.favoriteMatching(preset);
+           if (!isBuilding && !isIndoorArea && fromGeometry === 'area') {
+             // ensure that areas keep area geometry
+             entityTags.area = 'yes';
+           }
 
-           if (item) {
-             var items = _this.getFavorites();
+           var replacement = osmNode({
+             loc: extractedLoc,
+             tags: pointTags
+           });
+           graph = graph.replace(replacement);
+           extractedNodeID = replacement.id;
+           return graph.replace(entity.update({
+             tags: entityTags
+           }));
+         }
 
-             items.splice(items.indexOf(item), 1);
-             setFavorites(items);
-           }
+         action.getExtractedNodeID = function () {
+           return extractedNodeID;
          };
 
-         _this.getFavorites = function () {
-           if (!_favorites) {
-             // fetch from local storage
-             var rawFavorites = JSON.parse(corePreferences('preset_favorites'));
+         return action;
+       }
 
-             if (!rawFavorites) {
-               rawFavorites = [];
-               corePreferences('preset_favorites', JSON.stringify(rawFavorites));
-             }
+       //
+       // 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
+       //
 
-             _favorites = rawFavorites.reduce(function (output, d) {
-               var item = ribbonItemForMinified(d, 'favorite');
-               if (item && item.preset.addable()) output.push(item);
-               return output;
-             }, []);
-           }
+       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);
+           }));
+         }
 
-           return _favorites;
-         };
+         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.
 
-         _this.favoriteMatching = function (preset) {
-           var favs = _this.getFavorites();
+           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
 
-           for (var index in favs) {
-             if (favs[index].matches(preset)) {
-               return favs[index];
-             }
-           }
+           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.
 
-           return null;
-         };
+           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
 
-         return utilRebind(_this, dispatch$1, 'on');
-       }
+           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
 
-       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;
+             if (multipolygons.length !== 1) return;
+             var multipolygon = multipolygons[0];
 
-         for (var i = 0; i < array.length; i++) {
-           val = array[i];
-           entity = typeof val === 'string' ? graph.hasEntity(val) : val;
+             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;
+             }
 
-           if (entity) {
-             extent._extend(entity.extent(graph));
-           }
-         }
+             survivor = survivor.mergeTags(multipolygon.tags);
+             graph = graph.replace(survivor);
+             graph = actionDeleteRelation(multipolygon.id, true
+             /* allow untagged members */
+             )(graph);
+             var tags = Object.assign({}, survivor.tags);
 
-         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 (survivor.geometry(graph) !== 'area') {
+               // ensure the feature persists as an area
+               tags.area = 'yes';
+             }
 
-           if ((oldVal || oldVal === '') && (newVal === undefined || newVal !== oldVal)) {
-             tagDiff.push({
-               type: '-',
-               key: k,
-               oldVal: oldVal,
-               newVal: newVal,
-               display: '- ' + k + '=' + oldVal
-             });
-           }
+             delete tags.type; // remove type=multipolygon
 
-           if ((newVal || newVal === '') && (oldVal === undefined || newVal !== oldVal)) {
-             tagDiff.push({
-               type: '+',
-               key: k,
-               oldVal: oldVal,
-               newVal: newVal,
-               display: '+ ' + k + '=' + newVal
+             survivor = survivor.update({
+               tags: tags
              });
+             graph = graph.replace(survivor);
            }
-         });
-         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
+           checkForSimpleMultipolygon();
+           return graph;
+         }; // Returns the number of nodes the resultant way is expected to have
 
-       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);
+         action.resultingWayNodesLength = function (graph) {
+           return ids.reduce(function (count, id) {
+             return count + graph.entity(id).nodes.length;
+           }, 0) - ids.length - 1;
+         };
 
-         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
+         action.disabled = function (graph) {
+           var geometries = groupEntitiesByGeometry(graph);
 
-       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));
+           if (ids.length < 2 || ids.length !== geometries.line.length) {
+             return 'not_eligible';
+           }
 
-         function collectDeepDescendants(id) {
-           if (seen.has(id)) return;
-           seen.add(id);
+           var joined = osmJoinWays(ids.map(graph.entity, graph), graph);
 
-           if (!idsSet.has(id)) {
-             returners.add(id);
+           if (joined.length > 1) {
+             return 'not_adjacent';
            }
 
-           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
+           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.
 
-       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 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;
+             });
+           };
 
-       function utilGetAllNodes(ids, graph) {
-         var seen = new Set();
-         var nodes = new Set();
-         ids.forEach(collectNodes);
-         return Array.from(nodes);
+           var relsA = sortedParentRelations(ids[0]);
 
-         function collectNodes(id) {
-           if (seen.has(id)) return;
-           seen.add(id);
-           var entity = graph.hasEntity(id);
-           if (!entity) return;
+           for (i = 1; i < ids.length; i++) {
+             var relsB = sortedParentRelations(ids[i]);
 
-           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
+             if (!utilArrayIdentical(relsA, relsB)) {
+               return 'conflicting_relations';
+             }
+           } // Loop through all combinations of path-pairs
+           // to check potential intersections between all pairs
+
+
+           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
+
+               var common = utilArrayIntersection(joined[0].nodes.map(function (n) {
+                 return n.loc.toString();
+               }), intersections.map(function (n) {
+                 return n.toString();
+               }));
+
+               if (common.length !== intersections.length) {
+                 return 'paths_intersect';
+               }
+             }
            }
-         }
-       }
-       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;
 
-         if (!name && entity.tags.ref) {
-           name = entity.tags.ref;
+           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 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 (network) {
-             name = network + ' ' + name;
+           if (relation) {
+             return relation.isRestriction() ? 'restriction' : 'connectivity';
            }
-         }
 
-         return name;
-       }
-       function utilDisplayNameForPath(entity) {
-         var name = utilDisplayName(entity);
-         var isFirefox = utilDetect().browser.toLowerCase().indexOf('firefox') > -1;
-
-         if (!isFirefox && name && rtlRegex.test(name)) {
-           name = fixRTLTextForSvg(name);
-         }
+           if (conflicting) {
+             return 'conflicting_tags';
+           }
+         };
 
-         return name;
-       }
-       function utilDisplayType(id) {
-         return {
-           n: _t('inspector.node'),
-           w: _t('inspector.way'),
-           r: _t('inspector.relation')
-         }[id.charAt(0)];
+         return action;
        }
-       function utilDisplayLabel(entity, graphOrGeometry) {
-         var displayName = utilDisplayName(entity);
 
-         if (displayName) {
-           // use the display name if there is one
-           return displayName;
+       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 preset = typeof graphOrGeometry === 'string' ? _mainPresetIndex.matchTags(entity.tags, graphOrGeometry) : _mainPresetIndex.match(entity, graphOrGeometry);
+         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;
 
-         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 (!point.isNew()) {
+               // Try to preserve the original point if it already has
+               // an ID in the database.
+               var inserted = false;
 
+               var canBeReplaced = function canBeReplaced(node) {
+                 return !(graph.parentWays(node).length > 1 || graph.parentRelations(node).length);
+               };
 
-         return 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 ]
-       // }
+               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;
+               };
 
-       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
+               var i;
+               var node; // First, try to replace a new child node on the target way.
 
-         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`
+               for (i = 0; i < nodes.length; i++) {
+                 node = nodes[i];
 
-             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);
+                 if (canBeReplaced(node) && node.isNew()) {
+                   replaceNode(node);
+                   break;
                  }
                }
-             }
-
-             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
+               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];
 
-           tags[key] = tags[key].sort(function (val1, val2) {
-             var key = key; // capture
+                   if (canBeReplaced(node) && !node.hasInterestingTags()) {
+                     replaceNode(node);
+                     break;
+                   }
+                 }
 
-             var count2 = tagCounts[key + '=' + val2];
-             var count1 = tagCounts[key + '=' + val1];
+                 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];
 
-             if (count2 !== count1) {
-               return count2 - count1;
-             }
+                     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.
 
-             if (val2 && val1) {
-               return val1.localeCompare(val2);
+               }
              }
 
-             return val1 ? 1 : -1;
+             graph = graph.remove(removeNode);
            });
-         }
-
-         return tags;
-       }
-       function utilStringQs(str) {
-         var i = 0; // advance past any leading '?' or '#' characters
 
-         while (i < str.length && (str[i] === '?' || str[i] === '#')) {
-           i++;
-         }
+           if (target.tags.area === 'yes') {
+             var tags = Object.assign({}, target.tags); // shallow copy
 
-         str = str.slice(i);
-         return str.split('&').reduce(function (obj, pair) {
-           var parts = pair.split('=');
+             delete tags.area;
 
-           if (parts.length === 2) {
-             obj[parts[0]] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
+             if (osmTagSuggestingArea(tags)) {
+               // remove the `area` tag if area geometry is now implied - #3851
+               target = target.update({
+                 tags: tags
+               });
+               graph = graph.replace(target);
+             }
            }
 
-           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 graph;
+         };
 
-         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);
+         action.disabled = function (graph) {
+           var geometries = groupEntitiesByGeometry(graph);
 
-         while (++i < n) {
-           if (prefixes[i] + property in s) {
-             return prefixes[i] + property;
+           if (geometries.point.length === 0 || geometries.area.length + geometries.line.length !== 1 || geometries.relation.length !== 0) {
+             return 'not_eligible';
            }
-         }
+         };
 
-         return false;
+         return action;
        }
-       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();
-         }
+       //
+       // 1. move all the nodes to a common location
+       // 2. `actionConnect` them
 
-         while (++i < n) {
-           if (prefixes[i] + property in s) {
-             return '-' + prefixes[i].toLowerCase() + property.replace(/([A-Z])/g, '-$1').toLowerCase();
-           }
-         }
+       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;
 
-         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.
+           for (var i = 0; i < nodeIDs.length; i++) {
+             var node = graph.entity(nodeIDs[i]);
 
-       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;
+             if (node.hasInterestingTags()) {
+               interestingLoc = ++interestingCount === 1 ? node.loc : null;
+             }
 
-         for (i = 0; i <= b.length; i++) {
-           matrix[i] = [i];
-         }
+             sum = geoVecAdd(sum, node.loc);
+           }
 
-         for (j = 0; j <= a.length; j++) {
-           matrix[0][j] = j;
+           return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
          }
 
-         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
-             }
+         var action = function action(graph) {
+           if (nodeIDs.length < 2) return graph;
+           var toLoc = loc;
+
+           if (!toLoc) {
+             toLoc = chooseLoc(graph);
            }
-         }
 
-         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
+           for (var i = 0; i < nodeIDs.length; i++) {
+             var node = graph.entity(nodeIDs[i]);
 
-       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];
+             if (node.loc !== toLoc) {
+               graph = graph.replace(node.move(toLoc));
+             }
+           }
+
+           return actionConnect(nodeIDs)(graph);
          };
-       }
-       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;
-         }
+         action.disabled = function (graph) {
+           if (nodeIDs.length < 2) return 'not_eligible';
 
-         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
-        */
+           for (var i = 0; i < nodeIDs.length; i++) {
+             var entity = graph.entity(nodeIDs[i]);
+             if (entity.type !== 'node') return 'not_eligible';
+           }
 
-       function utilFunctor(value) {
-         if (typeof value === 'function') return value;
-         return function () {
-           return value;
+           return actionConnect(nodeIDs).disabled(graph);
          };
-       }
-       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);
+         return action;
+       }
 
-           hash = (hash << 5) - hash + _char;
-           hash = hash & hash; // Convert to 32bit integer
+       function osmChangeset() {
+         if (!(this instanceof osmChangeset)) {
+           return new osmChangeset().initialize(arguments);
+         } else if (arguments.length) {
+           this.initialize(arguments);
          }
-
-         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('');
        }
+       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 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);
-       }
+           function nest(x, order) {
+             var groups = {};
 
-       osmEntity.id = function (type) {
-         return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
-       };
+             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]);
+             }
 
-       osmEntity.id.next = {
-         changeset: -1,
-         node: -1,
-         way: -1,
-         relation: -1
-       };
+             var ordered = {};
+             order.forEach(function (o) {
+               if (groups[o]) ordered[o] = groups[o];
+             });
+             return ordered;
+           } // sort relations in a changeset by dependencies
 
-       osmEntity.id.fromOSM = function (type, id) {
-         return type[0] + id;
-       };
 
-       osmEntity.id.toOSM = function (id) {
-         return id.slice(1);
-       };
+           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
 
-       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().
 
+             function isNew(item) {
+               return !sorted[item['@id']] && !processing.find(function (proc) {
+                 return proc['@id'] === item['@id'];
+               });
+             }
 
-       osmEntity.key = function (entity) {
-         return entity.id + 'v' + (entity.v || 0);
-       };
+             var processing = [];
+             var sorted = {};
+             var relations = changes.relation;
+             if (!relations) return changes;
 
-       var _deprecatedTagValuesByKey;
+             for (var i = 0; i < relations.length; i++) {
+               var relation = relations[i]; // skip relation if already sorted
 
-       osmEntity.deprecatedTagValuesByKey = function (dataDeprecated) {
-         if (!_deprecatedTagValuesByKey) {
-           _deprecatedTagValuesByKey = {};
-           dataDeprecated.forEach(function (d) {
-             var oldKeys = Object.keys(d.old);
+               if (!sorted[relation['@id']]) {
+                 processing.push(relation);
+               }
 
-             if (oldKeys.length === 1) {
-               var oldKey = oldKeys[0];
-               var oldValue = d.old[oldKey];
+               while (processing.length > 0) {
+                 var next = processing[0],
+                     deps = next.member.map(resolve).filter(Boolean).filter(isNew);
 
-               if (oldValue !== '*') {
-                 if (!_deprecatedTagValuesByKey[oldKey]) {
-                   _deprecatedTagValuesByKey[oldKey] = [oldValue];
+                 if (deps.length === 0) {
+                   sorted[next['@id']] = next;
+                   processing.shift();
                  } else {
-                   _deprecatedTagValuesByKey[oldKey].push(oldValue);
+                   processing = deps.concat(processing);
                  }
                }
              }
-           });
+
+             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
+               })
+             }
+           };
+         },
+         asGeoJSON: function asGeoJSON() {
+           return {};
          }
+       });
 
-         return _deprecatedTagValuesByKey;
+       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--;
        };
 
-       osmEntity.prototype = {
-         tags: {},
+       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 (!this.id && this.type) {
-             this.id = osmEntity.id(this.type);
-           }
-
-           if (!this.hasOwnProperty('visible')) {
-             this.visible = true;
+           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 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;
+       };
+
+       Object.assign(osmRelation.prototype, {
+         type: 'relation',
+         members: [],
          copy: function copy(resolver, copies) {
            if (copies[this.id]) return copies[this.id];
-           var copy = osmEntity(this, {
-             id: undefined,
-             user: undefined,
-             version: undefined
+           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;
          },
-         osmId: function osmId() {
-           return osmEntity.id.toOSM(this.id);
+         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);
+
+               if (member) {
+                 extent._extend(member.extent(resolver, memo));
+               }
+             }
+
+             return extent;
+           });
          },
-         isNew: function isNew() {
-           return this.osmId() < 0;
+         geometry: function geometry(graph) {
+           return graph["transient"](this, 'geometry', function () {
+             return this.isMultipolygon() ? 'area' : 'relation';
+           });
          },
-         update: function update(attrs) {
-           return osmEntity(this, attrs, {
-             v: 1 + (this.v || 0)
+         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 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 = [];
+
+           for (var i = 0; i < this.members.length; i++) {
+             if (this.members[i].role === role) {
+               result.push(Object.assign({}, this.members[i], {
+                 index: i
+               }));
+             }
+           }
+
+           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
            });
          },
-         mergeTags: function mergeTags(tags) {
-           var merged = Object.assign({}, this.tags); // shallow copy
+         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 = [];
 
-           var changed = false;
+           for (var i = 0; i < this.members.length; i++) {
+             var member = this.members[i];
 
-           for (var k in tags) {
-             var t1 = merged[k];
-             var t2 = tags[k];
+             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
+               });
+             }
+           }
 
-             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 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)
              }
+           };
+
+           if (changeset_id) {
+             r.relation['@changeset'] = changeset_id;
            }
 
-           return changed ? this.update({
-             tags: merged
-           }) : this;
+           return r;
          },
-         intersects: function intersects(extent, resolver) {
-           return this.extent(resolver).intersects(extent);
+         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));
+                 })
+               };
+             }
+           });
          },
-         hasNonGeometryTags: function hasNonGeometryTags() {
-           return Object.keys(this.tags).some(function (k) {
-             return k !== 'area';
+         area: function area(resolver) {
+           return resolver["transient"](this, 'area', function () {
+             return d3_geoArea(this.asGeoJSON(resolver));
            });
          },
-         hasParentRelations: function hasParentRelations(resolver) {
-           return resolver.parentRelations(this).length > 0;
+         isMultipolygon: function isMultipolygon() {
+           return this.tags.type === 'multipolygon';
          },
-         hasInterestingTags: function hasInterestingTags() {
-           return Object.keys(this.tags).some(osmIsInterestingTag);
+         isComplete: function isComplete(resolver) {
+           for (var i = 0; i < this.members.length; i++) {
+             if (!resolver.hasEntity(this.members[i].id)) {
+               return false;
+             }
+           }
+
+           return true;
          },
-         hasWikidata: function hasWikidata() {
-           return !!this.tags.wikidata || !!this.tags['brand:wikidata'];
+         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';
+           });
          },
-         isHighwayIntersection: function isHighwayIntersection() {
-           return false;
+         isRestriction: function isRestriction() {
+           return !!(this.tags.type && this.tags.type.match(/^restriction:?/));
          },
-         isDegenerate: function isDegenerate() {
+         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;
          },
-         deprecatedTags: function deprecatedTags(dataDeprecated) {
-           var tags = this.tags; // if there are no tags, none can be deprecated
+         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 (Object.keys(tags).length === 0) return [];
-           var deprecated = [];
-           dataDeprecated.forEach(function (d) {
-             var oldKeys = Object.keys(d.old);
+           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 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 findOuter(inner) {
+             var o, outer;
+
+             for (o = 0; o < outers.length; o++) {
+               outer = outers[o];
+
+               if (geoPolygonContainsPolygon(outer, inner)) {
+                 return o;
+               }
+             }
+
+             for (o = 0; o < outers.length; o++) {
+               outer = outers[o];
+
+               if (geoPolygonIntersectsPolygon(outer, inner, false)) {
+                 return o;
+               }
+             }
+           }
+
+           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();
+             }
+
+             var o = findOuter(inners[i]);
+
+             if (o !== undefined) {
+               result[o].push(inners[i]);
+             } else {
+               result.push([inners[i]]); // Invalid geometry
+             }
+           }
+
+           return result;
+         }
+       });
+
+       var QAItem = /*#__PURE__*/function () {
+         function QAItem(loc, service, itemType, id, props) {
+           _classCallCheck$1(this, QAItem);
+
+           // 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
+
+           if (service && typeof service.getIcon === 'function') {
+             this.icon = service.getIcon(itemType);
+           }
+         }
+
+         _createClass$1(QAItem, [{
+           key: "update",
+           value: function update(props) {
+             var _this = 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
+
+         }], [{
+           key: "id",
+           value: function id() {
+             return this.nextId--;
+           }
+         }]);
+
+         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
+       //
+
+       function actionSplit(nodeIds, newWayIds) {
+         // accept single ID for backwards-compatiblity
+         if (typeof nodeIds === 'string') nodeIds = [nodeIds];
+
+         var _wayIDs; // the strategy for picking which way will have a new version and which way is newly created
+
+
+         var _keepHistoryOn = 'longest'; // 'longest', 'first'
+         // The IDs of the ways actually created by running this action
+
+         var _createdWayIDs = [];
+
+         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.
 
-             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;
-             }
+         function splitArea(nodes, idxA, graph) {
+           var lengths = new Array(nodes.length);
+           var length;
+           var i;
+           var best = 0;
+           var idxB;
 
-             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);
+           function wrap(index) {
+             return utilWrap(index, nodes.length);
+           } // calculate lengths
 
-               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;
-             });
+           length = 0;
 
-             if (matchesDeprecatedTags) {
-               deprecated.push(d);
-             }
-           });
-           return deprecated;
-         }
-       };
+           for (i = wrap(idxA + 1); i !== idxA; i = wrap(i + 1)) {
+             length += dist(graph, nodes[i], nodes[wrap(i - 1)]);
+             lengths[i] = length;
+           }
 
-       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
+           length = 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 (i = wrap(idxA - 1); i !== idxA; i = wrap(i - 1)) {
+             length += dist(graph, nodes[i], nodes[wrap(i + 1)]);
 
-         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
-         };
-       }
+             if (length < lengths[i]) {
+               lengths[i] = length;
+             }
+           } // determine best opposite node to split
 
-       function getLaneCount(tags, isOneWay) {
-         var count;
 
-         if (tags.lanes) {
-           count = parseInt(tags.lanes, 10);
+           for (i = 0; i < nodes.length; i++) {
+             var cost = lengths[i] / dist(graph, nodes[idxA], nodes[i]);
 
-           if (count > 0) {
-             return count;
+             if (cost > best) {
+               idxB = i;
+               best = cost;
+             }
            }
+
+           return idxB;
          }
 
-         switch (tags.highway) {
-           case 'trunk':
-           case 'motorway':
-             count = isOneWay ? 2 : 4;
-             break;
+         function totalLengthBetweenNodes(graph, nodes) {
+           var totalLength = 0;
 
-           default:
-             count = isOneWay ? 1 : 2;
-             break;
+           for (var i = 0; i < nodes.length - 1; i++) {
+             totalLength += dist(graph, nodes[i], nodes[i + 1]);
+           }
+
+           return totalLength;
          }
 
-         return count;
-       }
+         function split(graph, nodeId, wayA, newWayId) {
+           var wayB = osmWay({
+             id: newWayId,
+             tags: wayA.tags
+           }); // `wayB` is the NEW way
 
-       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);
-       }
+           var origNodes = wayA.nodes.slice();
+           var nodesA;
+           var nodesB;
+           var isArea = wayA.isArea();
+           var isOuter = osmIsOldMultipolygonOuterMember(wayA, graph);
 
-       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 (wayA.isClosed()) {
+             var nodes = wayA.nodes.slice(0, -1);
+             var idxA = nodes.indexOf(nodeId);
+             var idxB = splitArea(nodes, idxA, graph);
 
-         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;
+             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);
            }
 
-           forward = laneCount - bothways - backward;
-         } else if (isNaN(backward)) {
-           if (forward > laneCount - bothways) {
-             forward = laneCount - bothways;
+           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
+             });
            }
 
-           backward = laneCount - bothways - forward;
-         }
+           if (wayA.tags.step_count) {
+             // divide up the the step count proportionally between the two ways
+             var stepCount = parseFloat(wayA.tags.step_count);
 
-         return {
-           forward: forward,
-           backward: backward,
-           bothways: bothways
-         };
-       }
+             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
+               });
+             }
+           }
 
-       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;
-           });
-         });
-       }
+           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
 
-       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 (relation.hasFromViaTo()) {
+               var f = relation.memberByRole('from');
+               var v = relation.membersByRole('via');
+               var t = relation.memberByRole('to');
+               var i; // 1. split a FROM/TO
 
-       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 (f.id === wayA.id || t.id === wayA.id) {
+                 var keepB = false;
 
-       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;
-         });
-       }
+                 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);
 
-       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 (wayVia && utilArrayIntersection(wayB.nodes, wayVia.nodes).length) {
+                         keepB = true;
+                         break;
+                       }
+                     }
+                   }
+                 }
 
-       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();
+                 if (keepB) {
+                   relation = relation.replaceMember(wayA, wayB);
+                   graph = graph.replace(relation);
+                 } // 2. split a VIA
 
-             for (var i = 0; i < this.nodes.length; i++) {
-               var node = resolver.hasEntity(this.nodes[i]);
+               } 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;
+                   }
+                 }
+               } // 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)
 
-               if (node) {
-                 extent._extend(node.extent());
+             } else {
+               if (relation === isOuter) {
+                 graph = graph.replace(relation.mergeTags(wayA.tags));
+                 graph = graph.replace(wayA.update({
+                   tags: {}
+                 }));
+                 graph = graph.replace(wayB.update({
+                   tags: {}
+                 }));
                }
-             }
-
-             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 (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
+               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);
              }
-           };
+           });
 
-           for (var key in averageWidths) {
-             if (this.tags[key] && averageWidths[key][this.tags[key]]) {
-               var width = averageWidths[key][this.tags[key]];
+           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 (key === 'highway') {
-                 var laneCount = this.tags.lanes && parseInt(this.tags.lanes, 10);
-                 if (!laneCount) laneCount = this.isOneWay() ? 1 : 2;
-                 return width * laneCount;
-               }
+           _createdWayIDs.push(wayB.id);
 
-               return width;
+           return graph;
+         }
+
+         var action = function action(graph) {
+           _createdWayIDs = [];
+           var newWayIndex = 0;
+
+           for (var i = 0; i < nodeIds.length; i++) {
+             var nodeId = nodeIds[i];
+             var candidates = action.waysForNode(nodeId, graph);
+
+             for (var j = 0; j < candidates.length; j++) {
+               graph = split(graph, nodeId, candidates[j], newWayIds && newWayIds[newWayIndex]);
+               newWayIndex += 1;
              }
            }
 
-           return null;
-         },
-         isOneWay: function isOneWay() {
-           // explicit oneway tag..
-           var values = {
-             'yes': true,
-             '1': true,
-             '-1': true,
-             'reversible': true,
-             'alternating': true,
-             'no': false,
-             '0': false
-           };
-
-           if (values[this.tags.oneway] !== undefined) {
-             return values[this.tags.oneway];
-           } // implied oneway tag..
+           return graph;
+         };
 
+         action.getCreatedWayIDs = function () {
+           return _createdWayIDs;
+         };
 
-           for (var key in this.tags) {
-             if (key in osmOneWayTags && this.tags[key] in osmOneWayTags[key]) return true;
-           }
+         action.waysForNode = function (nodeId, graph) {
+           var node = graph.entity(nodeId);
+           var splittableParents = graph.parentWays(node).filter(isSplittable);
 
-           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];
+           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 (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];
-               }
+             if (hasLine) {
+               return splittableParents.filter(function (parent) {
+                 return parent.geometry(graph) === 'line';
+               });
              }
            }
 
-           return null;
-         },
-         isSided: function isSided() {
-           if (this.tags.two_sided === 'yes') {
-             return false;
-           }
+           return splittableParents;
 
-           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;
+           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...
 
-           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 (parent.isClosed()) return true; // otherwise, we can't split nodes at their endpoints.
 
-             if (curr === 0) {
-               continue;
-             } else if (prev && curr !== prev) {
-               return false;
+             for (var i = 1; i < parent.nodes.length - 1; i++) {
+               if (parent.nodes[i] === nodeId) return true;
              }
 
-             prev = curr;
+             return false;
            }
+         };
 
-           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;
+         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';
              }
            }
+         };
 
-           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])]]);
-           }
+         action.limitWays = function (val) {
+           if (!arguments.length) return _wayIDs;
+           _wayIDs = val;
+           return action;
+         };
 
-           return graph["transient"](this, 'segments', function () {
-             var segments = [];
+         action.keepHistoryOn = function (val) {
+           if (!arguments.length) return _keepHistoryOn;
+           _keepHistoryOn = val;
+           return action;
+         };
 
-             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 action;
+       }
 
-             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..
+       function coreGraph(other, mutable) {
+         if (!(this instanceof coreGraph)) return new coreGraph(other, mutable);
 
-           while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-             nodes.splice(i, 1);
-             i = nodes.length - 1;
-           }
+         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]);
+         }
 
-           nodes = nodes.filter(noRepeatNodes);
-           return this.update({
-             nodes: nodes
-           });
+         this.transients = {};
+         this._childNodes = {};
+         this.frozen = !mutable;
+       }
+       coreGraph.prototype = {
+         hasEntity: function hasEntity(id) {
+           return this.entities[id];
          },
-         // 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;
+         entity: function entity(id) {
+           var entity = this.entities[id]; //https://github.com/openstreetmap/iD/issues/3973#issuecomment-307052376
 
-           if (index === undefined) {
-             index = max;
+           if (!entity) {
+             entity = this.entities.__proto__[id]; // eslint-disable-line no-proto
            }
 
-           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 (isClosed) {
-             var connector = this.first(); // leading connectors..
-
-             var i = 1;
+           if (!entity) {
+             throw new Error('entity ' + id + ' not found');
+           }
 
-             while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
-               nodes.splice(i, 1);
-               if (index > i) index--;
-             } // trailing connectors..
+           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] = {});
 
+           if (transients[key] !== undefined) {
+             return transients[key];
+           }
 
-             i = nodes.length - 1;
+           transients[key] = fn.call(entity);
+           return transients[key];
+         },
+         parentWays: function parentWays(entity) {
+           var parents = this._parentWays[entity.id];
+           var result = [];
 
-             while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-               nodes.splice(i, 1);
-               if (index > i) index--;
-               i = nodes.length - 1;
-             }
+           if (parents) {
+             parents.forEach(function (id) {
+               result.push(this.entity(id));
+             }, this);
            }
 
-           nodes.splice(index, 0, id);
-           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
+           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 = [];
 
-           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-             nodes.push(nodes[0]);
+           if (parents) {
+             parents.forEach(function (id) {
+               result.push(this.entity(id));
+             }, this);
            }
 
-           return this.update({
-             nodes: nodes
+           return result;
+         },
+         parentMultipolygons: function parentMultipolygons(entity) {
+           return this.parentRelations(entity).filter(function (relation) {
+             return relation.isMultipolygon();
            });
          },
-         // 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..
+         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 (isClosed) {
-             var connector = this.first(); // leading connectors..
+           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
 
-             var i = 1;
+             base.entities[entity.id] = entity;
 
-             while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
-               nodes.splice(i, 1);
-               if (index > i) index--;
-             } // trailing connectors..
+             this._updateCalculated(undefined, entity, base.parentWays, base.parentRels); // Restore provisionally-deleted nodes that are discovered to have an extant parent
 
 
-             i = nodes.length - 1;
+             if (entity.type === 'way') {
+               for (j = 0; j < entity.nodes.length; j++) {
+                 id = entity.nodes[j];
 
-             while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-               nodes.splice(i, 1);
-               if (index === i) index = 0; // update leading connector instead
+                 for (k = 1; k < stack.length; k++) {
+                   var ents = stack[k].entities;
 
-               i = nodes.length - 1;
+                   if (ents.hasOwnProperty(id) && ents[id] === undefined) {
+                     delete ents[id];
+                   }
+                 }
+               }
              }
            }
 
-           nodes.splice(index, 1, id);
-           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
-
-           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-             nodes.push(nodes[0]);
+           for (i = 0; i < stack.length; i++) {
+             stack[i]._updateRebased();
            }
-
-           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();
-
-           for (var i = 0; i < nodes.length; i++) {
-             if (nodes[i] === needleID) {
-               nodes[i] = replacementID;
+         _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);
              }
-           }
-
-           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
-
-           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-             nodes.push(nodes[0]);
-           }
-
-           return this.update({
-             nodes: nodes
-           });
+           }, 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.
          },
-         // 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..
-
-           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-             nodes.push(nodes[0]);
-           }
+         // 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;
 
-           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)
+           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 (changeset_id) {
-             r.way['@changeset'] = changeset_id;
-           }
 
-           return r;
-         },
-         asGeoJSON: function asGeoJSON(resolver) {
-           return resolver["transient"](this, 'GeoJSON', function () {
-             var coordinates = resolver.childNodes(this).map(function (n) {
-               return n.loc;
-             });
+             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);
+             }
 
-             if (this.isArea() && this.isClosed()) {
-               return {
-                 type: 'Polygon',
-                 coordinates: [coordinates]
-               };
-             } else {
-               return {
-                 type: 'LineString',
-                 coordinates: coordinates
-               };
+             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);
              }
-           });
-         },
-         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;
-               })]
-             };
+           } 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 (!this.isClosed() && nodes.length) {
-               json.coordinates[0].push(nodes[0].loc);
+             if (oldentity && entity) {
+               removed = utilArrayDifference(oldentityMemberIDs, entityMemberIDs);
+               added = utilArrayDifference(entityMemberIDs, oldentityMemberIDs);
+             } else if (oldentity) {
+               removed = oldentityMemberIDs;
+               added = [];
+             } else if (entity) {
+               removed = [];
+               added = entityMemberIDs;
              }
 
-             var area = d3_geoArea(json); // Heuristic for detecting counterclockwise winding order. Assumes
-             // that OpenStreetMap polygons are not hemisphere-spanning.
+             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);
+             }
 
-             if (area > 2 * Math.PI) {
-               json.coordinates[0] = json.coordinates[0].reverse();
-               area = d3_geoArea(json);
+             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 isNaN(area) ? 0 : area;
+             this.entities[entity.id] = entity;
            });
-         }
-       }); // Filter function to eliminate consecutive duplicates.
-
-       function noRepeatNodes(node, i, arr) {
-         return i === 0 || node !== arr[i - 1];
-       }
+         },
+         remove: function remove(entity) {
+           return this.update(function () {
+             this._updateCalculated(entity, undefined);
 
-       //
-       // 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.
+             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 osmOldMultipolygonOuterMemberOfRelation(entity, graph) {
-         if (entity.type !== 'relation' || !entity.isMultipolygon() || Object.keys(entity.tags).filter(osmIsInterestingTag).length > 1) {
-           return false;
-         }
+             delete this.entities[id];
+           });
+         },
+         update: function update() {
+           var graph = this.frozen ? coreGraph(this, true) : this;
 
-         var outerMember;
+           for (var i = 0; i < arguments.length; i++) {
+             arguments[i].call(graph, graph);
+           }
 
-         for (var memberIndex in entity.members) {
-           var member = entity.members[memberIndex];
+           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);
 
-           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 (var i in entities) {
+             this.entities[i] = entities[i];
 
-             if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
-               return false;
-             }
+             this._updateCalculated(base.entities[i], this.entities[i]);
            }
-         }
-
-         return outerMember;
-       } // For fixing up rendering of multipolygons with tags on the outer member.
-       // https://github.com/openstreetmap/iD/issues/613
-
-       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
+           return this;
+         }
+       };
 
-           if (member.id !== entity.id && (!member.role || member.role === 'outer')) return false; // Not a simple multipolygon
+       function osmTurn(turn) {
+         if (!(this instanceof osmTurn)) {
+           return new osmTurn(turn);
          }
 
-         return parent;
+         Object.assign(this, turn);
        }
-       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;
+       function osmIntersection(graph, startVertexId, maxDistance) {
+         maxDistance = maxDistance || 30; // in meters
 
-         for (var i = 0; i < members.length; i++) {
-           member = members[i];
+         var vgraph = coreGraph(); // virtual graph
 
-           if (!member.role || member.role === 'outer') {
-             if (outerMember) return false; // Not a simple multipolygon
+         var i, j, k;
 
-             outerMember = member;
-           }
+         function memberOfRestriction(entity) {
+           return graph.parentRelations(entity).some(function (r) {
+             return r.isRestriction();
+           });
          }
 
-         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.
-       //
-
-       function osmJoinWays(toJoin, graph) {
-         function resolve(member) {
-           return graph.childNodes(graph.entity(member.id));
+         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];
          }
 
-         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 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
 
+         var actions = []; // STEP 1:  walk the graph outwards from starting vertex to search
+         //  for more key vertices and ways to include in the intersection..
 
-         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)
+         while (checkVertices.length) {
+           vertex = checkVertices.pop(); // check this vertex for parent ways that are roads
 
-         var i;
-         var joinAsMembers = true;
+           checkWays = graph.parentWays(vertex);
+           var hasWays = false;
 
-         for (i = 0; i < toJoin.length; i++) {
-           if (toJoin[i] instanceof osmWay) {
-             joinAsMembers = false;
-             break;
-           }
-         }
+           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
 
-         var sequences = [];
-         sequences.actions = [];
+             hasWays = true; // check the way's children for more key vertices
 
-         while (toJoin.length) {
-           // start a new sequence
-           var item = toJoin.shift();
-           var currWays = [item];
-           var currNodes = resolve(item).slice(); // add to it
+             nodes = utilArrayUniq(graph.childNodes(way));
 
-           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.
+             for (j = 0; j < nodes.length; j++) {
+               node = nodes[j];
+               if (node === vertex) continue; // same thing
 
-             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 (vertices.indexOf(node) !== -1) continue; // seen it already
 
-               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 (geoSphericalDistance(node.loc, startNode.loc) > maxDistance) continue; // too far from start
+               // a key vertex will have parents that are also roads
 
-               if (nodes[0] === end) {
-                 fn = currNodes.push; // join to end
+               var hasParents = false;
+               parents = graph.parentWays(node);
 
-                 nodes = nodes.slice(1);
-                 break;
-               } else if (nodes[nodes.length - 1] === end) {
-                 fn = currNodes.push; // join to end
+               for (k = 0; k < parents.length; k++) {
+                 parent = parents[k];
+                 if (parent === way) continue; // same thing
 
-                 nodes = nodes.slice(0, -1).reverse();
-                 item = reverse(item);
-                 break;
-               } else if (nodes[nodes.length - 1] === start) {
-                 fn = currNodes.unshift; // join to beginning
+                 if (ways.indexOf(parent) !== -1) continue; // seen it already
 
-                 nodes = nodes.slice(0, -1);
-                 break;
-               } else if (nodes[0] === start) {
-                 fn = currNodes.unshift; // join to beginning
+                 if (!isRoad(parent)) continue; // not a road
 
-                 nodes = nodes.slice(1).reverse();
-                 item = reverse(item);
+                 hasParents = true;
                  break;
-               } else {
-                 fn = nodes = null;
                }
-             }
 
-             if (!nodes) {
-               // couldn't find a joinable way/member
-               break;
+               if (hasParents) {
+                 checkVertices.push(node);
+               }
              }
-
-             fn.apply(currWays, [item]);
-             fn.apply(currNodes, nodes);
-             toJoin.splice(i, 1);
            }
 
-           currWays.nodes = currNodes;
-           sequences.push(currWays);
+           if (hasWays) {
+             vertices.push(vertex);
+           }
          }
 
-         return sequences;
-       }
-
-       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);
+         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
 
-           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;
+         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));
+               }
              }
+           });
+         }); // STEP 3:  Force all oneways to be drawn in the forward direction
 
-             graph = graph.replace(relation.addMember(member, memberIndex));
+         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
 
-           return graph;
-         }; // Add a way member into the relation "wherever it makes sense".
-         // In this situation we were not supplied a memberIndex.
+         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');
 
-         function addWayMember(relation, graph) {
-           var groups, tempWay, item, i, j, k; // remove PTv2 stops and platforms before doing anything.
+           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
 
-           var PTv2members = [];
-           var members = [];
+         osmEntity.id.next.way = origCount; // STEP 5:  Update arrays to point to vgraph entities
 
-           for (i = 0; i < relation.members.length; i++) {
-             var m = relation.members[i];
+         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 (/stop|platform/.test(m.role)) {
-               PTv2members.push(m);
-             } else {
-               members.push(m);
-             }
-           }
+         function withMetadata(way, vertexIds) {
+           var __oneWay = way.isOneWay(); // which affixes are key vertices?
 
-           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 || [];
-           } 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 __first = vertexIds.indexOf(way.first()) !== -1;
 
-           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 __last = vertexIds.indexOf(way.last()) !== -1; // what roles is this way eligible for?
 
-           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
 
-             for (j = 0; j < members.length; j++) {
-               if (members[j].index === startIndex) {
-                 break;
-               }
-             } // k = each member in segment
+           var __via = __first && __last;
 
+           var __from = __first && !__oneWay || __last;
 
-             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
+           var __to = __first || __last && !__oneWay;
 
-               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
+           return way.update({
+             __first: __first,
+             __last: __last,
+             __from: __from,
+             __via: __via,
+             __to: __to,
+             __oneWay: __oneWay
+           });
+         }
 
+         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
 
-               if (k > 0) {
-                 if (j + k >= members.length || item.index !== members[j + k].index) {
-                   moveMember(members, item.index, j + k);
-                 }
+         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
                }
 
-               nodes.splice(0, way.nodes.length - 1);
+               removeVertexIds.push(vertexId);
+               continue;
              }
-           }
 
-           if (tempWay) {
-             graph = graph.remove(tempWay);
-           } // Final pass: skip dead items, split pairs, remove index properties
+             parents = vgraph.parentWays(vertex);
 
+             if (parents.length < 3) {
+               if (vertexIds.indexOf(vertexId) !== -1) {
+                 vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+               }
+             }
 
-           var wayMembers = [];
+             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;
 
-           for (i = 0; i < members.length; i++) {
-             item = members[i];
-             if (item.index === -1) continue;
+               if (aIsLeaf && !bIsLeaf) {
+                 leaf = a;
+                 survivor = b;
+               } else if (!aIsLeaf && bIsLeaf) {
+                 leaf = b;
+                 survivor = a;
+               }
 
-             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 (leaf && survivor) {
+                 survivor = withMetadata(survivor, vertexIds); // update survivor way
 
+                 vgraph = vgraph.replace(survivor).remove(leaf); // update 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
-           //
+                 removeWayIds.push(leaf.id);
+                 keepGoing = true;
+               }
+             }
 
-           function moveMember(arr, findIndex, toIndex) {
-             var i;
+             parents = vgraph.parentWays(vertex);
 
-             for (i = 0; i < arr.length; i++) {
-               if (arr[i].index === findIndex) {
-                 break;
+             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
                }
+
+               removeVertexIds.push(vertexId);
+               keepGoing = true;
              }
 
-             var item = Object.assign({}, arr[i]); // shallow copy
+             if (parents.length < 1) {
+               // vertex is no longer attached to anything
+               vgraph = vgraph.remove(vertex);
+             }
+           }
+         } while (keepGoing);
 
-             arr[i].index = -1; // mark as dead
+         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..
 
-             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 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.
+         //
 
+         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)
 
-           function withIndex(arr) {
-             var result = new Array(arr.length);
+           var maxPathLength = maxViaWay * 2 + 3;
+           var turns = [];
+           step(start);
+           return turns; // traverse the intersection graph and find all the valid paths
 
-             for (var i = 0; i < arr.length; i++) {
-               result[i] = Object.assign({}, arr[i]); // shallow copy
+           function step(entity, currPath, currRestrictions, matchedRestriction) {
+             currPath = (currPath || []).slice(); // shallow copy
 
-               result[i].index = i;
-             }
+             if (currPath.length >= maxPathLength) return;
+             currPath.push(entity.id);
+             currRestrictions = (currRestrictions || []).slice(); // shallow copy
 
-             return result;
-           }
-         }
-       }
+             var i, j;
 
-       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 (entity.type === 'node') {
+               var parents = vgraph.parentWays(entity);
+               var nextWays = []; // which ways can we step into?
 
-                 return;
-               }
-             }
-           });
-           return graph;
-         };
-       }
+               for (i = 0; i < parents.length; i++) {
+                 var way = parents[i]; // if next way is a oneway incoming to this vertex, skip
 
-       // 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));
-         };
-       }
+                 if (way.__oneWay && way.nodes[0] !== entity.id) continue; // if we have seen it before (allowing for an initial u-turn), skip
 
-       function actionChangeMember(relationId, member, memberIndex) {
-         return function (graph) {
-           return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
-         };
-       }
+                 if (currPath.indexOf(way.id) !== -1 && currPath.length >= 3) continue; // Check all "current" restrictions (where we've already walked the `FROM`)
 
-       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
-           }));
-         };
-       }
+                 var restrict = null;
 
-       function actionChangeTags(entityId, tags) {
-         return function (graph) {
-           var entity = graph.entity(entityId);
-           return graph.replace(entity.update({
-             tags: tags
-           }));
-         };
-       }
+                 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?
 
-       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?
+                   var matchesFrom = f.id === fromWayId;
+                   var matchesViaTo = false;
+                   var isAlongOnlyPath = false;
 
-           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 (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 re = /:direction$/i;
-             var keys = Object.keys(this.tags);
+                       for (k = 2; k < currPath.length; k += 2) {
+                         // k = 2 skips FROM
+                         pathVias.push(currPath[k]); // (path goes way-node-way...)
+                       }
 
-             for (i = 0; i < keys.length; i++) {
-               if (re.test(keys[i])) {
-                 val = this.tags[keys[i]].toLowerCase();
-                 break;
-               }
-             }
-           }
+                       var restrictionVias = [];
 
-           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
+                       for (k = 0; k < v.length; k++) {
+                         if (v[k].type === 'way') {
+                           restrictionVias.push(v[k].id);
+                         }
+                       }
 
+                       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 (v !== '' && !isNaN(+v)) {
-               results.push(+v);
-               return;
-             } // string direction - inspect parent ways
+                   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)
 
 
-             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;
+                   if (restrict && restrict.direct) break;
+                 }
 
-               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
+                 nextWays.push({
+                   way: way,
+                   restrict: restrict
+                 });
+               }
+
+               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)
+
+                 if (matchedRestriction && matchedRestriction.direct === false) {
+                   for (i = 0; i < turnPath.length; i++) {
+                     if (turnPath[i] === matchedRestriction.from) {
+                       turnPath = turnPath.slice(i);
+                       break;
+                     }
+                   }
+                 }
+
+                 var turn = pathToTurn(turnPath);
+
+                 if (turn) {
+                   if (matchedRestriction) {
+                     turn.restrictionID = matchedRestriction.id;
+                     turn.no = matchedRestriction.no;
+                     turn.only = matchedRestriction.only;
+                     turn.direct = matchedRestriction.direct;
                    }
 
-                   if (lookBackward && i < nodes.length - 1) {
-                     nodeIds[nodes[i + 1]] = true; // look ahead to next node
-                   }
-                 }
+                   turns.push(osmTurn(turn));
+                 }
+
+                 if (currPath[0] === currPath[2]) return; // if we made a u-turn - stop here
+               }
+
+               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 = [];
+
+               if (currPath.length > 1) {
+                 if (dist > maxDistance) return; // the next node is too far
+
+                 if (!entity.__via) return; // this way is a leaf / can't be a via
                }
-             }, 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 (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;
+               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
                }
-             } else if (parents.length === 1) {
-               var way = parents[0];
-               var nodes = way.nodes.slice();
 
-               if (way.isClosed()) {
-                 nodes.pop();
-               } // ignore connecting node if closed
-               // return true if vertex appears multiple times (way is self intersecting)
+               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
 
-               return nodes.indexOf(this.id) !== nodes.lastIndexOf(this.id);
-             }
+                   var isOnlyVia = false;
+                   var v = r.membersByRole('via');
 
-             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]
+                   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 (viaWay.first() === nextNode.id || viaWay.last() === nextNode.id) {
+                         isOnlyVia = true;
+                         break;
+                       }
+                     }
                    }
-                 };
-               }, this)
+
+                   return isOnlyVia;
+                 });
+                 step(nextNode, currPath, currRestrictions.concat(fromRestrictions), false);
+               });
              }
-           };
-           if (changeset_id) r.node['@changeset'] = changeset_id;
-           return r;
-         },
-         asGeoJSON: function asGeoJSON() {
-           return {
-             type: 'Point',
-             coordinates: this.loc
-           };
-         }
-       });
+           } // assumes path is alternating way-node-way of odd length
 
-       function actionCircularize(wayId, projection, maxAngle) {
-         maxAngle = (maxAngle || 20) * 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);
-           var origNodes = {};
-           graph.childNodes(way).forEach(function (node) {
-             if (!origNodes[node.id]) origNodes[node.id] = node;
-           });
+           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];
 
-           if (!way.isConvex(graph)) {
-             graph = action.makeConvex(graph);
-           }
+             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);
 
-           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 (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 (!keyNodes.length) {
-             keyNodes = [nodes[0]];
-             keyPoints = [points[0]];
+             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];
+             }
            }
+         };
 
-           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 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;
 
+         while (angle < 0) {
+           angle += 360;
+         }
 
-           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 (fromNode === toNode) {
+           return 'no_u_turn';
+         }
 
-             if (indexRange < 0) {
-               indexRange += nodes.length;
-             } // position this key node
+         if ((angle < 23 || angle > 336) && fromOneWay && toOneWay) {
+           return 'no_u_turn'; // wider tolerance for u-turn if both ways are oneway
+         }
 
+         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)
+         }
 
-             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 (angle < 158) {
+           return 'no_right_turn';
+         }
 
-             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
+         if (angle > 202) {
+           return 'no_left_turn';
+         }
 
-             if (totalAngle * sign > 0) {
-               totalAngle = -sign * (2 * Math.PI - Math.abs(totalAngle));
+         return 'no_straight_on';
+       }
+
+       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);
+         }
 
-             do {
-               numberNewPoints++;
-               eachAngle = totalAngle / (indexRange + numberNewPoints);
-             } while (Math.abs(eachAngle) > maxAngle); // move existing nodes
+         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.
 
+           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 = 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 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 (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
+           while (polygons.length) {
+             extractUncontained(polygons);
+             polygons = polygons.filter(isContained);
+             contained = contained.filter(isContained).map(filterContained);
+           }
 
-               var min = Infinity;
+           function isContained(d, i) {
+             return contained[i].some(function (val) {
+               return val;
+             });
+           }
 
-               for (var nodeId in nearNodes) {
-                 var nearAngle = nearNodes[nodeId];
-                 var dist = Math.abs(nearAngle - angle);
+           function filterContained(d) {
+             return d.filter(isContained);
+           }
 
-                 if (dist < min) {
-                   min = dist;
-                   origNode = origNodes[nodeId];
-                 }
+           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'
+                   });
+                 });
                }
-
-               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..
+             });
+             outer = !outer;
+           } // Move all tags to one relation.
+           // Keep the oldest multipolygon alive if it exists.
 
 
-             if (indexRange === 1 && inBetweenNodes.length) {
-               var startIndex1 = way.nodes.lastIndexOf(startNode.id);
-               var endIndex1 = way.nodes.lastIndexOf(endNode.id);
-               var wayDirection1 = endIndex1 - startIndex1;
+           var relation;
 
-               if (wayDirection1 < -1) {
-                 wayDirection1 = 1;
+           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'
                }
+             });
+           }
 
-               var parentWays = graph.parentWays(keyNodes[i]);
-
-               for (j = 0; j < parentWays.length; j++) {
-                 var sharedWay = parentWays[j];
-                 if (sharedWay === way) 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 (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 (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'])
+           }));
+         };
 
-                   if (wayDirection2 < -1) {
-                     wayDirection2 = 1;
-                   }
+         action.disabled = function (graph) {
+           var entities = groupEntities(graph);
 
-                   if (wayDirection1 !== wayDirection2) {
-                     inBetweenNodes.reverse();
-                     insertAt = startIndex2;
-                   }
+           if (entities.other.length > 0 || entities.closedWay.length + entities.multipolygon.length < 2) {
+             return 'not_eligible';
+           }
 
-                   for (k = 0; k < inBetweenNodes.length; k++) {
-                     sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);
-                   }
+           if (!entities.multipolygon.every(function (r) {
+             return r.isComplete(graph);
+           })) {
+             return 'incomplete_relation';
+           }
 
-                   graph = graph.replace(sharedWay);
-                 }
+           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;
+             });
+
+             if (sharedMultipolygons.length) {
+               // don't create a new multipolygon if it'd be redundant
+               return 'not_eligible';
              }
-           } // update the way to have all the new nodes
+           } 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';
+           }
+         };
 
+         return action;
+       }
 
-           ids = nodes.map(function (n) {
-             return n.id;
-           });
-           ids.push(ids[0]);
-           way = way.update({
-             nodes: ids
-           });
-           graph = graph.replace(way);
-           return graph;
-         };
+       var DESCRIPTORS$1 = descriptors;
+       var objectDefinePropertyModule = objectDefineProperty;
+       var regExpFlags = regexpFlags$1;
+       var fails$4 = fails$V;
 
-         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 RegExpPrototype = RegExp.prototype;
+
+       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';
+       });
+
+       // `RegExp.prototype.flags` getter
+       // https://tc39.es/ecma262/#sec-get-regexp.prototype.flags
+       if (FORCED$2) objectDefinePropertyModule.f(RegExpPrototype, 'flags', {
+         configurable: true,
+         get: regExpFlags
+       });
+
+       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;
+
+           if (Array.isArray(a)) {
+             length = a.length;
+             if (length != b.length) return false;
+
+             for (i = length; i-- !== 0;) {
+               if (!equal(a[i], b[i])) return false;
+             }
 
-           if (sign === -1) {
-             nodes.reverse();
-             points.reverse();
+             return true;
            }
 
-           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;
-
-             if (indexRange < 0) {
-               indexRange += nodes.length;
-             } // move interior nodes to the surface of the convex hull..
+           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;
 
+           for (i = length; i-- !== 0;) {
+             if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
+           }
 
-             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);
-             }
+           for (i = length; i-- !== 0;) {
+             var key = keys[i];
+             if (!equal(a[key], b[key])) return false;
            }
 
-           return graph;
-         };
+           return true;
+         } // true if both NaN, false otherwise
 
-         action.disabled = function (graph) {
-           if (!graph.entity(wayId).isClosed()) {
-             return 'not_closed';
-           } //disable when already circular
 
+         return a !== a && b !== b;
+       };
 
-           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;
+       // 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
 
-           if (hull.length !== points.length || hull.length < 3) {
-             return false;
-           }
+       function LCS(buffer1, buffer2) {
+         var equivalenceClasses = {};
 
-           var centroid = d3_polygonCentroid(points);
-           var radius = geoVecLengthSquare(centroid, points[0]);
-           var i, actualPoint; // compare distances between centroid and points
+         for (var j = 0; j < buffer2.length; j++) {
+           var item = buffer2[j];
 
-           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%)
+           if (equivalenceClasses[item]) {
+             equivalenceClasses[item].push(j);
+           } else {
+             equivalenceClasses[item] = [j];
+           }
+         }
 
-             if (diff > 0.05 * radius) {
-               return false;
-             }
-           } //check if central angles are smaller than maxAngle
+         var NULLRESULT = {
+           buffer1index: -1,
+           buffer2index: -1,
+           chain: null
+         };
+         var candidates = [NULLRESULT];
 
+         for (var i = 0; i < buffer1.length; i++) {
+           var _item = buffer1[i];
+           var buffer2indices = equivalenceClasses[_item] || [];
+           var r = 0;
+           var c = candidates[0];
 
-           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;
+           for (var jx = 0; jx < buffer2indices.length; jx++) {
+             var _j = buffer2indices[jx];
+             var s = void 0;
 
-             if (angle < 0) {
-               angle = -angle;
+             for (s = r; s < candidates.length; s++) {
+               if (candidates[s].buffer2index < _j && (s === candidates.length - 1 || candidates[s + 1].buffer2index > _j)) {
+                 break;
+               }
              }
 
-             if (angle > Math.PI) {
-               angle = 2 * Math.PI - angle;
-             }
+             if (s < candidates.length) {
+               var newCandidate = {
+                 buffer1index: i,
+                 buffer2index: _j,
+                 chain: candidates[s]
+               };
 
-             if (angle > maxAngle + epsilonAngle) {
-               return false;
+               if (r === candidates.length) {
+                 candidates.push(c);
+               } else {
+                 candidates[r] = c;
+               }
+
+               r = s + 1;
+               c = newCandidate;
+
+               if (r === candidates.length) {
+                 break; // no point in examining further (j)s
+               }
              }
            }
 
-           return 'already_circular';
-         };
+           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].
 
-         action.transitionable = true;
-         return action;
-       }
 
-       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
+         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.
 
-           if (geometries.point) return false; // delete if this node only be a vertex
 
-           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
+       function diffIndices(buffer1, buffer2) {
+         var lcs = LCS(buffer1, buffer2);
+         var result = [];
+         var tail1 = buffer1.length;
+         var tail2 = buffer2.length;
 
-           return !node.hasInterestingTags();
-         }
+         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 action = function action(graph) {
-           var way = graph.entity(wayID);
-           graph.parentRelations(way).forEach(function (parent) {
-             parent = parent.removeMembersWithID(wayID);
-             graph = graph.replace(parent);
+           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)
+             });
+           }
+         }
 
-             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);
+         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 (canDeleteNode(node, graph)) {
-               graph = graph.remove(node);
-             }
-           });
-           return graph.remove(way);
-         };
 
-         return action;
-       }
+       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 actionDeleteMultiple(ids) {
-         var actions = {
-           way: actionDeleteWay,
-           node: actionDeleteNode,
-           relation: actionDeleteRelation
-         };
+         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])
 
-         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;
-         };
+         }
 
-         return action;
-       }
+         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;
 
-       function actionDeleteRelation(relationID, allowUntaggedMembers) {
-         function canDeleteEntity(entity, graph) {
-           return !graph.parentWays(entity).length && !graph.parentRelations(entity).length && !entity.hasInterestingTags() && !allowUntaggedMembers;
+         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 action = function action(graph) {
-           var relation = graph.entity(relationID);
-           graph.parentRelations(relation).forEach(function (parent) {
-             parent = parent.removeMembersWithID(relationID);
-             graph = graph.replace(parent);
+         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
 
-             if (parent.isDegenerate()) {
-               graph = actionDeleteRelation(parent.id)(graph);
+           while (hunks.length) {
+             var nextHunk = hunks[0];
+             var nextHunkStart = nextHunk.oStart;
+             if (nextHunkStart > regionEnd) break; // no overlap
+
+             regionEnd = Math.max(regionEnd, nextHunkStart + nextHunk.oLength);
+             regionHunks.push(hunks.shift());
+           }
+
+           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)
+               });
              }
-           });
-           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);
+           } 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]
+             };
 
-             if (canDeleteEntity(entity, graph)) {
-               graph = actionDeleteMultiple([memberID])(graph);
+             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]);
              }
-           });
-           return graph.remove(relation);
-         };
 
-         return action;
-       }
+             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);
+           }
 
-       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);
+           currOffset = regionEnd;
+         }
 
-             if (parent.isDegenerate()) {
-               graph = actionDeleteWay(parent.id)(graph);
-             }
-           });
-           graph.parentRelations(node).forEach(function (parent) {
-             parent = parent.removeMembersWithID(nodeId);
-             graph = graph.replace(parent);
+         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 (parent.isDegenerate()) {
-               graph = actionDeleteRelation(parent.id)(graph);
-             }
-           });
-           return graph.remove(node);
-         };
 
-         return action;
-       }
+       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 = [];
 
-       //
-       // 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 flushOk() {
+           if (okBuffer.length) {
+             results.push({
+               ok: okBuffer
+             });
+           }
 
-       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
+           okBuffer = [];
+         }
 
-           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.
+         function isFalseConflict(a, b) {
+           if (a.length !== b.length) return false;
 
+           for (var i = 0; i < a.length; i++) {
+             if (a[i] !== b[i]) return false;
+           }
 
-           for (i = 0; i < nodeIDs.length; i++) {
-             node = graph.entity(nodeIDs[i]);
-             if (node.id === survivor.id) continue;
-             parents = graph.parentWays(node);
+           return true;
+         }
 
-             for (j = 0; j < parents.length; j++) {
-               graph = graph.replace(parents[j].replaceNode(node.id, survivor.id));
-             }
+         regions.forEach(function (region) {
+           if (region.stable) {
+             var _okBuffer;
 
-             parents = graph.parentRelations(node);
+             (_okBuffer = okBuffer).push.apply(_okBuffer, _toConsumableArray(region.bufferContent));
+           } else {
+             if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
+               var _okBuffer2;
 
-             for (j = 0; j < parents.length; j++) {
-               graph = graph.replace(parents[j].replaceMember(node, survivor));
+               (_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
+                 }
+               });
              }
-
-             survivor = survivor.mergeTags(node.tags);
-             graph = actionDeleteNode(node.id)(graph);
            }
+         });
+         flushOk();
+         return results;
+       }
 
-           graph = graph.replace(survivor); // find and delete any degenerate ways created by connecting adjacent vertices
+       var lodash = {exports: {}};
 
-           parents = graph.parentWays(survivor);
+       (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).
+            */
 
-           for (i = 0; i < parents.length; i++) {
-             if (parents[i].isDegenerate()) {
-               graph = actionDeleteWay(parents[i].id)(graph);
-             }
-           }
+           var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
+               reHasRegExpChar = RegExp(reRegExpChar.source);
+           /** Used to match leading whitespace. */
 
-           return graph;
-         };
+           var reTrimStart = /^\s+/;
+           /** Used to match a single whitespace character. */
 
-         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
+           var reWhitespace = /\s/;
+           /** Used to match wrap detail comments. */
 
-           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
+           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 (i = 0; i < nodeIDs.length; i++) {
-             node = graph.entity(nodeIDs[i]);
-             relations = graph.parentRelations(node);
+           var reForbiddenIdentifierChars = /[()=,{}\[\]\/\s]/;
+           /** Used to match backslashes in property paths. */
 
-             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
+           var reEscapeChar = /\\(\\)?/g;
+           /**
+            * Used to match
+            * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
+            */
 
-               if (relation.hasFromViaTo()) {
-                 restrictionIDs.push(relation.id);
-               }
+           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).
+            */
 
-               if (seen[relation.id] !== undefined && seen[relation.id] !== role) {
-                 return 'relation';
-               } else {
-                 seen[relation.id] = role;
-               }
-             }
-           } // gather restrictions for parent ways
+           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 freeParseFloat = parseFloat,
+               freeParseInt = parseInt;
+           /** Detect free variable `global` from Node.js. */
 
-           for (i = 0; i < nodeIDs.length; i++) {
-             node = graph.entity(nodeIDs[i]);
-             var parents = graph.parentWays(node);
+           var freeGlobal = _typeof(commonjsGlobal) == 'object' && commonjsGlobal && commonjsGlobal.Object === Object && commonjsGlobal;
+           /** Detect free variable `self`. */
 
-             for (j = 0; j < parents.length; j++) {
-               var parent = parents[j];
-               relations = graph.parentRelations(parent);
+           var freeSelf = (typeof self === "undefined" ? "undefined" : _typeof(self)) == 'object' && self && self.Object === Object && self;
+           /** Used as a reference to the global object. */
 
-               for (k = 0; k < relations.length; k++) {
-                 relation = relations[k];
+           var root = freeGlobal || freeSelf || Function('return this')();
+           /** Detect free variable `exports`. */
+
+           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`. */
 
-                 if (relation.hasFromViaTo()) {
-                   restrictionIDs.push(relation.id);
-                 }
-               }
-             }
-           } // test restrictions
+           var moduleExports = freeModule && freeModule.exports === freeExports;
+           /** Detect free variable `process` from Node.js. */
 
+           var freeProcess = moduleExports && freeGlobal.process;
+           /** Used to access faster Node.js helpers. */
 
-           restrictionIDs = utilArrayUniq(restrictionIDs);
+           var nodeUtil = function () {
+             try {
+               // Use `util.types` for Node.js 10+.
+               var types = freeModule && freeModule.require && freeModule.require('util').types;
 
-           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)
+               if (types) {
+                 return types;
+               } // Legacy `process.binding('util')` for Node.js < 10.
 
-             var nodes = {
-               from: [],
-               via: [],
-               to: [],
-               keyfrom: [],
-               keyto: []
-             };
 
-             for (j = 0; j < relation.members.length; j++) {
-               collectNodes(relation.members[j], nodes);
-             }
+               return freeProcess && freeProcess.binding && freeProcess.binding('util');
+             } catch (e) {}
+           }();
+           /* Node.js helper references. */
 
-             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];
+           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 (nodes.from.indexOf(n) !== -1) {
-                 connectFrom = true;
-               }
+           /**
+            * 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`.
+            */
 
-               if (nodes.via.indexOf(n) !== -1) {
-                 connectVia = true;
-               }
+           function apply(func, thisArg, args) {
+             switch (args.length) {
+               case 0:
+                 return func.call(thisArg);
 
-               if (nodes.to.indexOf(n) !== -1) {
-                 connectTo = true;
-               }
+               case 1:
+                 return func.call(thisArg, args[0]);
 
-               if (nodes.keyfrom.indexOf(n) !== -1) {
-                 connectKeyFrom = true;
-               }
+               case 2:
+                 return func.call(thisArg, args[0], args[1]);
 
-               if (nodes.keyto.indexOf(n) !== -1) {
-                 connectKeyTo = true;
-               }
+               case 3:
+                 return func.call(thisArg, args[0], args[1], args[2]);
              }
 
-             if (connectFrom && connectTo && !isUturn) {
-               return 'restriction';
-             }
+             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`.
+            */
 
-             if (connectFrom && connectVia) {
-               return 'restriction';
+
+           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);
              }
 
-             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.
+             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`.
+            */
 
 
-             if (connectKeyFrom || connectKeyTo) {
-               if (nodeIDs.length !== 2) {
-                 return 'restriction';
+           function arrayEach(array, iteratee) {
+             var index = -1,
+                 length = array == null ? 0 : array.length;
+
+             while (++index < length) {
+               if (iteratee(array[index], index, array) === false) {
+                 break;
                }
+             }
 
-               var n0 = null;
-               var n1 = null;
+             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`.
+            */
 
-               for (j = 0; j < memberWays.length; j++) {
-                 way = memberWays[j];
 
-                 if (way.contains(nodeIDs[0])) {
-                   n0 = nodeIDs[0];
-                 }
+           function arrayEachRight(array, iteratee) {
+             var length = array == null ? 0 : array.length;
 
-                 if (way.contains(nodeIDs[1])) {
-                   n1 = nodeIDs[1];
-                 }
+             while (length--) {
+               if (iteratee(array[length], length, array) === false) {
+                 break;
                }
+             }
 
-               if (n0 && n1) {
-                 // both nodes are part of the restriction
-                 var ok = false;
+             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`.
+            */
 
-                 for (j = 0; j < memberWays.length; j++) {
-                   way = memberWays[j];
 
-                   if (way.areAdjacent(n0, n1)) {
-                     ok = true;
-                     break;
-                   }
-                 }
+           function arrayEvery(array, predicate) {
+             var index = -1,
+                 length = array == null ? 0 : array.length;
 
-                 if (!ok) {
-                   return 'restriction';
-                 }
+             while (++index < length) {
+               if (!predicate(array[index], index, array)) {
+                 return false;
                }
-             } // 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 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 (j = 0; j < memberWays.length; j++) {
-               way = memberWays[j].update({}); // make copy
 
-               for (k = 0; k < nodeIDs.length; k++) {
-                 if (nodeIDs[k] === survivor.id) continue;
+           function arrayFilter(array, predicate) {
+             var index = -1,
+                 length = array == null ? 0 : array.length,
+                 resIndex = 0,
+                 result = [];
 
-                 if (way.areAdjacent(nodeIDs[k], survivor.id)) {
-                   way = way.removeNode(nodeIDs[k]);
-                 } else {
-                   way = way.replaceNode(nodeIDs[k], survivor.id);
-                 }
-               }
+             while (++index < length) {
+               var value = array[index];
 
-               if (way.isDegenerate()) {
-                 return 'restriction';
+               if (predicate(value, index, array)) {
+                 result[resIndex++] = value;
                }
              }
+
+             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`.
+            */
 
-           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 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`.
+            */
 
-           function keyNodeFilter(froms, tos) {
-             return function (n) {
-               return froms.indexOf(n) === -1 && tos.indexOf(n) === -1;
-             };
-           }
 
-           function collectNodes(member, collection) {
-             var entity = graph.hasEntity(member.id);
-             if (!entity) return;
-             var role = member.role || '';
+           function arrayIncludesWith(array, value, comparator) {
+             var index = -1,
+                 length = array == null ? 0 : array.length;
 
-             if (!collection[role]) {
-               collection[role] = [];
+             while (++index < length) {
+               if (comparator(value, array[index])) {
+                 return true;
+               }
              }
 
-             if (member.type === 'node') {
-               collection[role].push(member.id);
+             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.
+            */
 
-               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 arrayMap(array, iteratee) {
+             var index = -1,
+                 length = array == null ? 0 : array.length,
+                 result = Array(length);
 
-               if (role === 'to' || role === 'via') {
-                 collection.keyto.push(entity.first());
-                 collection.keyto.push(entity.last());
-               }
+             while (++index < length) {
+               result[index] = iteratee(array[index], index, array);
              }
+
+             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`.
+            */
 
-         return action;
-       }
 
-       function actionCopyEntities(ids, fromGraph) {
-         var _copies = {};
+           function arrayPush(array, values) {
+             var index = -1,
+                 length = values.length,
+                 offset = array.length;
 
-         var action = function action(graph) {
-           ids.forEach(function (id) {
-             fromGraph.entity(id).copy(fromGraph, _copies);
-           });
+             while (++index < length) {
+               array[offset + index] = values[index];
+             }
 
-           for (var id in _copies) {
-             graph = graph.replace(_copies[id]);
+             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.
+            */
 
-           return graph;
-         };
 
-         action.copies = function () {
-           return _copies;
-         };
+           function arrayReduce(array, iteratee, accumulator, initAccum) {
+             var index = -1,
+                 length = array == null ? 0 : array.length;
 
-         return action;
-       }
+             if (initAccum && length) {
+               accumulator = array[++index];
+             }
 
-       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;
-         };
-       }
+             while (++index < length) {
+               accumulator = iteratee(accumulator, array[index], index, array);
+             }
 
-       function actionDiscardTags(difference, discardTags) {
-         discardTags = discardTags || {};
-         return function (graph) {
-           difference.modified().forEach(checkTags);
-           difference.created().forEach(checkTags);
-           return graph;
+             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.
+            */
 
-           function checkTags(entity) {
-             var keys = Object.keys(entity.tags);
-             var didDiscard = false;
-             var tags = {};
 
-             for (var i = 0; i < keys.length; i++) {
-               var k = keys[i];
+           function arrayReduceRight(array, iteratee, accumulator, initAccum) {
+             var length = array == null ? 0 : array.length;
 
-               if (discardTags[k] || !entity.tags[k]) {
-                 didDiscard = true;
-               } else {
-                 tags[k] = entity.tags[k];
-               }
+             if (initAccum && length) {
+               accumulator = array[--length];
              }
 
-             if (didDiscard) {
-               graph = graph.replace(entity.update({
-                 tags: tags
-               }));
+             while (length--) {
+               accumulator = iteratee(accumulator, array[length], length, array);
              }
-           }
-         };
-       }
 
-       //
-       // 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 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`.
+            */
 
-       function actionDisconnect(nodeId, newNodeId) {
-         var wayIds;
 
-         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);
+           function arraySome(array, predicate) {
+             var index = -1,
+                 length = array == null ? 0 : array.length;
 
-             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));
+             while (++index < length) {
+               if (predicate(array[index], index, array)) {
+                 return true;
+               }
              }
-           });
-           return graph;
-         };
 
-         action.connections = function (graph) {
-           var candidates = [];
-           var keeping = false;
-           var parentWays = graph.parentWays(graph.entity(nodeId));
-           var way, waynode;
+             return false;
+           }
+           /**
+            * Gets the size of an ASCII `string`.
+            *
+            * @private
+            * @param {string} string The string inspect.
+            * @returns {number} Returns the string size.
+            */
 
-           for (var i = 0; i < parentWays.length; i++) {
-             way = parentWays[i];
 
-             if (wayIds && wayIds.indexOf(way.id) === -1) {
-               keeping = true;
-               continue;
-             }
+           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 (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];
+           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`.
+            */
 
-                 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 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`.
+            */
 
-           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;
+           function baseFindKey(collection, predicate, eachFunc) {
+             var result;
+             eachFunc(collection, function (value, key, collection) {
+               if (predicate(value, key, collection)) {
+                 result = key;
+                 return false;
                }
              });
-           });
-           if (sharedRelation) return 'relation';
-         };
-
-         action.limitWays = function (val) {
-           if (!arguments.length) return wayIds;
-           wayIds = val;
-           return action;
-         };
+             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`.
+            */
 
-         return action;
-       }
 
-       var geojsonRewind = rewind;
+           function baseFindIndex(array, predicate, fromIndex, fromRight) {
+             var length = array.length,
+                 index = fromIndex + (fromRight ? 1 : -1);
 
-       function rewind(gj, outer) {
-         var type = gj && gj.type,
-             i;
+             while (fromRight ? index-- : ++index < length) {
+               if (predicate(array[index], index, array)) {
+                 return index;
+               }
+             }
 
-         if (type === 'FeatureCollection') {
-           for (i = 0; i < gj.features.length; i++) {
-             rewind(gj.features[i], outer);
-           }
-         } else if (type === 'GeometryCollection') {
-           for (i = 0; i < gj.geometries.length; i++) {
-             rewind(gj.geometries[i], outer);
+             return -1;
            }
-         } 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);
+           /**
+            * 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`.
+            */
+
+
+           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`.
+            */
 
-         return gj;
-       }
 
-       function rewindRings(rings, outer) {
-         if (rings.length === 0) return;
-         rewindRing(rings[0], outer);
+           function baseIndexOfWith(array, value, fromIndex, comparator) {
+             var index = fromIndex - 1,
+                 length = array.length;
 
-         for (var i = 1; i < rings.length; i++) {
-           rewindRing(rings[i], !outer);
-         }
-       }
+             while (++index < length) {
+               if (comparator(array[index], value)) {
+                 return index;
+               }
+             }
 
-       function rewindRing(ring, dir) {
-         var area = 0;
+             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`.
+            */
 
-         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 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 actionExtract(entityID) {
-         var extractedNodeID;
 
-         var action = function action(graph) {
-           var entity = graph.entity(entityID);
+           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.
+            */
 
-           if (entity.type === 'node') {
-             return extractFromNode(entity, graph);
+
+           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.
+            */
 
-           return extractFromWayOrRelation(entity, graph);
-         };
 
-         function extractFromNode(node, graph) {
-           extractedNodeID = node.id; // Create a new node to replace the one we will detach
+           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.
+            */
 
-           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 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`.
+            */
 
-           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 baseSortBy(array, comparer) {
+             var length = array.length;
+             array.sort(comparer);
 
-           var extractedLoc = d3_geoCentroid(geojsonRewind(Object.assign({}, entity.asGeoJSON(graph)), true));
+             while (length--) {
+               array[length] = array[length].value;
+             }
 
-           if (!extractedLoc || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
-             extractedLoc = entity.extent(graph).center();
+             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.
+            */
 
-           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 baseSum(array, iteratee) {
+             var result,
+                 index = -1,
+                 length = array.length;
 
-           for (var key in entityTags) {
-             if (entity.type === 'relation' && key === 'type') {
-               continue;
-             }
+             while (++index < length) {
+               var current = iteratee(array[index]);
 
-             if (keysToRetain.indexOf(key) !== -1) {
-               continue;
+               if (current !== undefined$1) {
+                 result = result === undefined$1 ? current : result + current;
+               }
              }
 
-             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
+             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.
+            */
 
 
-             if (isIndoorArea && key === 'indoor') {
-               continue;
-             } // copy the tag from the entity to the point
+           function baseTimes(n, iteratee) {
+             var index = -1,
+                 result = Array(n);
 
+             while (++index < n) {
+               result[index] = iteratee(index);
+             }
 
-             pointTags[key] = entityTags[key]; // leave addresses and some other tags so they're on both features
+             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.
+            */
 
-             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 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.
+            */
 
 
-             delete entityTags[key];
+           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.
+            */
 
-           if (!isBuilding && !isIndoorArea && fromGeometry === 'area') {
-             // ensure that areas keep area geometry
-             entityTags.area = 'yes';
+
+           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.
+            */
 
-           var replacement = osmNode({
-             loc: extractedLoc,
-             tags: pointTags
-           });
-           graph = graph.replace(replacement);
-           extractedNodeID = replacement.id;
-           return graph.replace(entity.update({
-             tags: entityTags
-           }));
-         }
 
-         action.getExtractedNodeID = function () {
-           return extractedNodeID;
-         };
+           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`.
+            */
 
-         return action;
-       }
 
-       //
-       // 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
-       //
+           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.
+            */
 
-       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 charsStartIndex(strSymbols, chrSymbols) {
+             var index = -1,
+                 length = strSymbols.length;
 
-           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.
+             while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
 
-           for (var i = 0; i < ways.length; i++) {
-             if (!ways[i].isNew()) {
-               survivorID = ways[i].id;
-               break;
-             }
+             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.
+            */
 
-           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
+           function charsEndIndex(strSymbols, chrSymbols) {
+             var index = strSymbols.length;
 
-           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
+             while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
 
-             if (multipolygons.length !== 1) return;
-             var multipolygon = multipolygons[0];
+             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.
+            */
 
-             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;
-             }
 
-             survivor = survivor.mergeTags(multipolygon.tags);
-             graph = graph.replace(survivor);
-             graph = actionDeleteRelation(multipolygon.id, true
-             /* allow untagged members */
-             )(graph);
-             var tags = Object.assign({}, survivor.tags);
+           function countHolders(array, placeholder) {
+             var length = array.length,
+                 result = 0;
 
-             if (survivor.geometry(graph) !== 'area') {
-               // ensure the feature persists as an area
-               tags.area = 'yes';
+             while (length--) {
+               if (array[length] === placeholder) {
+                 ++result;
+               }
              }
 
-             delete tags.type; // remove type=multipolygon
-
-             survivor = survivor.update({
-               tags: tags
-             });
-             graph = graph.replace(survivor);
+             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.
+            */
 
-           checkForSimpleMultipolygon();
-           return graph;
-         }; // Returns the number of nodes the resultant way is expected to have
 
+           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.resultingWayNodesLength = function (graph) {
-           return ids.reduce(function (count, id) {
-             return count + graph.entity(id).nodes.length;
-           }, 0) - ids.length - 1;
-         };
+           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.
+            */
 
-         action.disabled = function (graph) {
-           var geometries = groupEntitiesByGeometry(graph);
+           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.
+            */
 
-           if (ids.length < 2 || ids.length !== geometries.line.length) {
-             return 'not_eligible';
+
+           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`.
+            */
 
-           var joined = osmJoinWays(ids.map(graph.entity, graph), graph);
 
-           if (joined.length > 1) {
-             return 'not_adjacent';
-           } // Loop through all combinations of path-pairs
-           // to check potential intersections between all pairs
+           function hasUnicode(string) {
+             return reHasUnicode.test(string);
+           }
+           /**
+            * 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`.
+            */
 
 
-           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
+           function hasUnicodeWord(string) {
+             return reHasUnicodeWord.test(string);
+           }
+           /**
+            * Converts `iterator` to an array.
+            *
+            * @private
+            * @param {Object} iterator The iterator to convert.
+            * @returns {Array} Returns the converted array.
+            */
 
-               var common = utilArrayIntersection(joined[0].nodes.map(function (n) {
-                 return n.loc.toString();
-               }), intersections.map(function (n) {
-                 return n.toString();
-               }));
 
-               if (common.length !== intersections.length) {
-                 return 'paths_intersect';
-               }
+           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.
+            */
 
-           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;
-               }
+
+           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 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;
+
+           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.
+            */
+
+
+           function replaceHolders(array, placeholder) {
+             var index = -1,
+                 length = array.length,
+                 resIndex = 0,
+                 result = [];
+
+             while (++index < length) {
+               var value = array[index];
+
+               if (value === placeholder || value === PLACEHOLDER) {
+                 array[index] = PLACEHOLDER;
+                 result[resIndex++] = index;
                }
              }
-           });
 
-           if (relation) {
-             return 'restriction';
+             return result;
            }
+           /**
+            * Converts `set` to an array of its values.
+            *
+            * @private
+            * @param {Object} set The set to convert.
+            * @returns {Array} Returns the values.
+            */
 
-           if (conflicting) {
-             return 'conflicting_tags';
-           }
-         };
 
-         return action;
-       }
+           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.
+            */
 
-       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 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));
+           function setToPairs(set) {
+             var index = -1,
+                 result = Array(set.size);
+             set.forEach(function (value) {
+               result[++index] = [value, value];
              });
-             var nodes = utilArrayUniq(graph.childNodes(target));
-             var removeNode = point;
-
-             for (var i = 0; i < nodes.length; i++) {
-               var node = nodes[i];
+             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`.
+            */
 
-               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 strictIndexOf(array, value, fromIndex) {
+             var index = fromIndex - 1,
+                 length = array.length;
 
-               graph = graph.replace(point.update({
-                 tags: {},
-                 loc: node.loc
-               }));
-               target = target.replaceNode(node.id, point.id);
-               graph = graph.replace(target);
-               removeNode = node;
-               break;
+             while (++index < length) {
+               if (array[index] === value) {
+                 return index;
+               }
              }
 
-             graph = graph.remove(removeNode);
-           });
+             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`.
+            */
 
-           if (target.tags.area === 'yes') {
-             var tags = Object.assign({}, target.tags); // shallow copy
 
-             delete tags.area;
+           function strictLastIndexOf(array, value, fromIndex) {
+             var index = fromIndex + 1;
 
-             if (osmTagSuggestingArea(tags)) {
-               // remove the `area` tag if area geometry is now implied - #3851
-               target = target.update({
-                 tags: tags
-               });
-               graph = graph.replace(target);
+             while (index--) {
+               if (array[index] === value) {
+                 return index;
+               }
              }
-           }
 
-           return graph;
-         };
+             return index;
+           }
+           /**
+            * Gets the number of symbols in `string`.
+            *
+            * @private
+            * @param {string} string The string to inspect.
+            * @returns {number} Returns the string size.
+            */
 
-         action.disabled = function (graph) {
-           var geometries = groupEntitiesByGeometry(graph);
 
-           if (geometries.point.length === 0 || geometries.area.length + geometries.line.length !== 1 || geometries.relation.length !== 0) {
-             return 'not_eligible';
+           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.
+            */
 
-         return action;
-       }
 
-       //
-       // 1. move all the nodes to a common location
-       // 2. `actionConnect` them
+           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.
+            */
 
-       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;
 
-           for (var i = 0; i < nodeIDs.length; i++) {
-             var node = graph.entity(nodeIDs[i]);
+           function trimmedEndIndex(string) {
+             var index = string.length;
 
-             if (node.hasInterestingTags()) {
-               interestingLoc = ++interestingCount === 1 ? node.loc : null;
-             }
+             while (index-- && reWhitespace.test(string.charAt(index))) {}
 
-             sum = geoVecAdd(sum, node.loc);
+             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.
+            */
 
-           return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
-         }
-
-         var action = function action(graph) {
-           if (nodeIDs.length < 2) return graph;
-           var toLoc = loc;
 
-           if (!toLoc) {
-             toLoc = chooseLoc(graph);
-           }
+           var unescapeHtmlChar = basePropertyOf(htmlUnescapes);
+           /**
+            * Gets the size of a Unicode `string`.
+            *
+            * @private
+            * @param {string} string The string inspect.
+            * @returns {number} Returns the string size.
+            */
 
-           for (var i = 0; i < nodeIDs.length; i++) {
-             var node = graph.entity(nodeIDs[i]);
+           function unicodeSize(string) {
+             var result = reUnicode.lastIndex = 0;
 
-             if (node.loc !== toLoc) {
-               graph = graph.replace(node.move(toLoc));
+             while (reUnicode.test(string)) {
+               ++result;
              }
-           }
 
-           return actionConnect(nodeIDs)(graph);
-         };
+             return result;
+           }
+           /**
+            * Converts a Unicode `string` to an array.
+            *
+            * @private
+            * @param {string} string The string to convert.
+            * @returns {Array} Returns the converted array.
+            */
 
-         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';
+           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`.
+            */
 
-           return actionConnect(nodeIDs).disabled(graph);
-         };
 
-         return action;
-       }
+           function unicodeWords(string) {
+             return string.match(reUnicodeWord) || [];
+           }
+           /*--------------------------------------------------------------------------*/
 
-       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'
-               }
-             }
-           };
-         },
-         // Generate [osmChange](http://wiki.openstreetmap.org/wiki/OsmChange)
-         // XML. Returns a string.
-         osmChangeJXON: function osmChangeJXON(changes) {
-           var changeset_id = this.id;
+           /**
+            * 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 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]);
-             }
+           var runInContext = function runInContext(context) {
+             context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps));
+             /** Built-in constructor references. */
 
-             var ordered = {};
-             order.forEach(function (o) {
-               if (groups[o]) ordered[o] = groups[o];
-             });
-             return ordered;
-           } // sort relations in a changeset by dependencies
+             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. */
 
+             var arrayProto = Array.prototype,
+                 funcProto = Function.prototype,
+                 objectProto = Object.prototype;
+             /** Used to detect overreaching core-js shims. */
 
-           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
+             var coreJsData = context['__core-js_shared__'];
+             /** Used to resolve the decompiled source of functions. */
 
+             var funcToString = funcProto.toString;
+             /** Used to check objects for own properties. */
 
-             function isNew(item) {
-               return !sorted[item['@id']] && !processing.find(function (proc) {
-                 return proc['@id'] === item['@id'];
-               });
-             }
+             var hasOwnProperty = objectProto.hasOwnProperty;
+             /** Used to generate unique IDs. */
 
-             var processing = [];
-             var sorted = {};
-             var relations = changes.relation;
-             if (!relations) return changes;
+             var idCounter = 0;
+             /** Used to detect methods masquerading as native. */
 
-             for (var i = 0; i < relations.length; i++) {
-               var relation = relations[i]; // skip relation if already sorted
+             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.
+              */
 
-               if (!sorted[relation['@id']]) {
-                 processing.push(relation);
-               }
 
-               while (processing.length > 0) {
-                 var next = processing[0],
-                     deps = next.member.map(resolve).filter(Boolean).filter(isNew);
+             var nativeObjectToString = objectProto.toString;
+             /** Used to infer the `Object` constructor. */
 
-                 if (deps.length === 0) {
-                   sorted[next['@id']] = next;
-                   processing.shift();
-                 } else {
-                   processing = deps.concat(processing);
-                 }
-               }
-             }
+             var objectCtorString = funcToString.call(Object);
+             /** Used to restore the original `_` reference in `_.noConflict`. */
 
-             changes.relation = Object.values(sorted);
-             return changes;
-           }
+             var oldDash = root._;
+             /** Used to detect if a method is native. */
 
-           function rep(entity) {
-             return entity.asJXON(changeset_id);
-           }
+             var reIsNative = RegExp('^' + funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&').replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$');
+             /** Built-in value references. */
 
-           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 {};
-         }
-       });
+             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;
 
-       function osmNote() {
-         if (!(this instanceof osmNote)) {
-           return new osmNote().initialize(arguments);
-         } else if (arguments.length) {
-           this.initialize(arguments);
-         }
-       }
+             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;
+             /*------------------------------------------------------------------------*/
 
-       osmNote.id = function () {
-         return osmNote.id.next--;
-       };
+             /**
+              * 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
+              */
 
-       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];
+             function lodash(value) {
+               if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
+                 if (value instanceof LodashWrapper) {
+                   return value;
+                 }
 
-             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 (hasOwnProperty.call(value, '__wrapped__')) {
+                   return wrapperClone(value);
                  }
                }
+
+               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 (!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
-           });
-         }
-       });
+             var baseCreate = function () {
+               function object() {}
 
-       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);
+               return function (proto) {
+                 if (!isObject(proto)) {
+                   return {};
+                 }
 
-       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;
-       };
+                 if (objectCreate) {
+                   return objectCreate(proto);
+                 }
 
-       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();
+                 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 < this.members.length; i++) {
-               var member = resolver.hasEntity(this.members[i].id);
 
-               if (member) {
-                 extent._extend(member.extent(resolver, memo));
-               }
+             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.
+              */
 
-             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 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
-               });
+             function LodashWrapper(value, chainAll) {
+               this.__wrapped__ = value;
+               this.__actions__ = [];
+               this.__chain__ = !!chainAll;
+               this.__index__ = 0;
+               this.__values__ = undefined$1;
              }
-           }
-         },
-         // Same as memberByRole, but returns all members with the given role
-         membersByRole: function membersByRole(role) {
-           var result = [];
+             /**
+              * 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}
+              */
 
-           for (var i = 0; i < this.members.length; i++) {
-             if (this.members[i].role === role) {
-               result.push(Object.assign({}, this.members[i], {
-                 index: i
-               }));
-             }
-           }
 
-           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 = [];
+             lodash.templateSettings = {
+               /**
+                * Used to detect `data` property values to be HTML-escaped.
+                *
+                * @memberOf _.templateSettings
+                * @type {RegExp}
+                */
+               'escape': reEscape,
 
-           for (var i = 0; i < this.members.length; i++) {
-             var member = this.members[i];
+               /**
+                * Used to detect code to be evaluated.
+                *
+                * @memberOf _.templateSettings
+                * @type {RegExp}
+                */
+               'evaluate': reEvaluate,
 
-             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
-               });
-             }
-           }
+               /**
+                * Used to detect `data` property values to inject.
+                *
+                * @memberOf _.templateSettings
+                * @type {RegExp}
+                */
+               'interpolate': reInterpolate,
 
-           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)
-             }
-           };
+               /**
+                * Used to reference the data object in the template text.
+                *
+                * @memberOf _.templateSettings
+                * @type {string}
+                */
+               'variable': '',
 
-           if (changeset_id) {
-             r.relation['@changeset'] = changeset_id;
-           }
+               /**
+                * 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;
+             /*------------------------------------------------------------------------*/
 
-           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));
-                 })
-               };
+             /**
+              * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
+              *
+              * @private
+              * @constructor
+              * @param {*} value The value to wrap.
+              */
+
+             function LazyWrapper(value) {
+               this.__wrapped__ = value;
+               this.__actions__ = [];
+               this.__dir__ = 1;
+               this.__filtered__ = false;
+               this.__iteratees__ = [];
+               this.__takeCount__ = MAX_ARRAY_LENGTH;
+               this.__views__ = [];
              }
-           });
-         },
-         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;
+             /**
+              * Creates a clone of the lazy wrapper object.
+              *
+              * @private
+              * @name clone
+              * @memberOf LazyWrapper
+              * @returns {Object} Returns the cloned `LazyWrapper` object.
+              */
+
+
+             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.
+              */
 
-           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 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.
+              */
 
-             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 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__);
 
-           function findOuter(inner) {
-             var o, outer;
+               if (!isArr || !isRight && arrLength == length && takeCount == length) {
+                 return baseWrapperValue(array, this.__actions__);
+               }
 
-             for (o = 0; o < outers.length; o++) {
-               outer = outers[o];
-               if (geoPolygonContainsPolygon(outer, inner)) return o;
-             }
+               var result = [];
 
-             for (o = 0; o < outers.length; o++) {
-               outer = outers[o];
-               if (geoPolygonIntersectsPolygon(outer, inner, false)) return o;
-             }
-           }
+               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;
+                     }
+                   }
+                 }
 
-           for (var i = 0; i < inners.length; i++) {
-             var inner = inners[i];
+                 result[resIndex++] = value;
+               }
 
-             if (d3_geoArea({
-               type: 'Polygon',
-               coordinates: [inner]
-             }) < 2 * Math.PI) {
-               inner = inner.reverse();
-             }
+               return result;
+             } // Ensure `LazyWrapper` is an instance of `baseLodash`.
 
-             var o = findOuter(inners[i]);
 
-             if (o !== undefined) {
-               result[o].push(inners[i]);
-             } else {
-               result.push([inners[i]]); // Invalid geometry
-             }
-           }
+             LazyWrapper.prototype = baseCreate(baseLodash.prototype);
+             LazyWrapper.prototype.constructor = LazyWrapper;
+             /*------------------------------------------------------------------------*/
 
-           return result;
-         }
-       });
+             /**
+              * Creates a hash object.
+              *
+              * @private
+              * @constructor
+              * @param {Array} [entries] The key-value pairs to cache.
+              */
 
-       var QAItem = /*#__PURE__*/function () {
-         function QAItem(loc, service, itemType, id, props) {
-           _classCallCheck(this, QAItem);
+             function Hash(entries) {
+               var index = -1,
+                   length = entries == null ? 0 : entries.length;
+               this.clear();
 
-           // 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
+               while (++index < length) {
+                 var entry = entries[index];
+                 this.set(entry[0], entry[1]);
+               }
+             }
+             /**
+              * Removes all key-value entries from the hash.
+              *
+              * @private
+              * @name clear
+              * @memberOf Hash
+              */
 
-           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);
-           }
-         }
+             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`.
+              */
 
-         _createClass(QAItem, [{
-           key: "update",
-           value: function update(props) {
-             var _this = 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
+             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.
+              */
 
-         }], [{
-           key: "id",
-           value: function id() {
-             return this.nextId--;
-           }
-         }]);
 
-         return QAItem;
-       }();
-       QAItem.nextId = -1;
+             function hashGet(key) {
+               var data = this.__data__;
 
-       //
-       // 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
-       //
+               if (nativeCreate) {
+                 var result = data[key];
+                 return result === HASH_UNDEFINED ? undefined$1 : result;
+               }
 
-       function actionSplit(nodeIds, newWayIds) {
-         // accept single ID for backwards-compatiblity
-         if (typeof nodeIds === 'string') nodeIds = [nodeIds];
+               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 _wayIDs; // the strategy for picking which way will have a new version and which way is newly created
 
+             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`.
 
-         var _keepHistoryOn = 'longest'; // 'longest', 'first'
-         // The IDs of the ways actually created by running this action
 
-         var _createdWayIDs = [];
+             Hash.prototype.clear = hashClear;
+             Hash.prototype['delete'] = hashDelete;
+             Hash.prototype.get = hashGet;
+             Hash.prototype.has = hashHas;
+             Hash.prototype.set = hashSet;
+             /*------------------------------------------------------------------------*/
 
-         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.
+             /**
+              * 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();
 
-         function splitArea(nodes, idxA, graph) {
-           var lengths = new Array(nodes.length);
-           var length;
-           var i;
-           var best = 0;
-           var idxB;
+               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
+              */
 
-           function wrap(index) {
-             return utilWrap(index, nodes.length);
-           } // calculate lengths
 
+             function listCacheClear() {
+               this.__data__ = [];
+               this.size = 0;
+             }
+             /**
+              * 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`.
+              */
 
-           length = 0;
 
-           for (i = wrap(idxA + 1); i !== idxA; i = wrap(i + 1)) {
-             length += dist(graph, nodes[i], nodes[wrap(i - 1)]);
-             lengths[i] = length;
-           }
+             function listCacheDelete(key) {
+               var data = this.__data__,
+                   index = assocIndexOf(data, key);
 
-           length = 0;
+               if (index < 0) {
+                 return false;
+               }
 
-           for (i = wrap(idxA - 1); i !== idxA; i = wrap(i - 1)) {
-             length += dist(graph, nodes[i], nodes[wrap(i + 1)]);
+               var lastIndex = data.length - 1;
 
-             if (length < lengths[i]) {
-               lengths[i] = length;
+               if (index == lastIndex) {
+                 data.pop();
+               } else {
+                 splice.call(data, index, 1);
+               }
+
+               --this.size;
+               return true;
              }
-           } // determine best opposite node to split
+             /**
+              * 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.
+              */
 
 
-           for (i = 0; i < nodes.length; i++) {
-             var cost = lengths[i] / dist(graph, nodes[idxA], nodes[i]);
+             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`.
+              */
 
-             if (cost > best) {
-               idxB = i;
-               best = cost;
+
+             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.
+              */
 
-           return idxB;
-         }
 
-         function totalLengthBetweenNodes(graph, nodes) {
-           var totalLength = 0;
+             function listCacheSet(key, value) {
+               var data = this.__data__,
+                   index = assocIndexOf(data, key);
 
-           for (var i = 0; i < nodes.length - 1; i++) {
-             totalLength += dist(graph, nodes[i], nodes[i + 1]);
-           }
+               if (index < 0) {
+                 ++this.size;
+                 data.push([key, value]);
+               } else {
+                 data[index][1] = value;
+               }
 
-           return totalLength;
-         }
+               return this;
+             } // Add methods to `ListCache`.
 
-         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);
+             ListCache.prototype.clear = listCacheClear;
+             ListCache.prototype['delete'] = listCacheDelete;
+             ListCache.prototype.get = listCacheGet;
+             ListCache.prototype.has = listCacheHas;
+             ListCache.prototype.set = listCacheSet;
+             /*------------------------------------------------------------------------*/
 
-           if (wayA.isClosed()) {
-             var nodes = wayA.nodes.slice(0, -1);
-             var idxA = nodes.indexOf(nodeId);
-             var idxB = splitArea(nodes, idxA, graph);
+             /**
+              * Creates a map cache object to store key-value pairs.
+              *
+              * @private
+              * @constructor
+              * @param {Array} [entries] The key-value pairs to cache.
+              */
 
-             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));
+             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]);
+               }
              }
-           } else {
-             var idx = wayA.nodes.indexOf(nodeId, 1);
-             nodesA = wayA.nodes.slice(0, idx + 1);
-             nodesB = wayA.nodes.slice(idx);
-           }
+             /**
+              * Removes all key-value entries from the map.
+              *
+              * @private
+              * @name clear
+              * @memberOf MapCache
+              */
 
-           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 mapCacheClear() {
+               this.size = 0;
+               this.__data__ = {
+                 'hash': new Hash(),
+                 'map': new (Map || ListCache)(),
+                 'string': new Hash()
+               };
+             }
+             /**
+              * 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`.
+              */
 
-           if (wayA.tags.step_count) {
-             // divide up the the step count proportionally between the two ways
-             var stepCount = parseFloat(wayA.tags.step_count);
 
-             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
-               });
+             function mapCacheDelete(key) {
+               var result = getMapData(this, key)['delete'](key);
+               this.size -= result ? 1 : 0;
+               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
+             /**
+              * 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.
+              */
 
-             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 (f.id === wayA.id || t.id === wayA.id) {
-                 var keepB = false;
+             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 (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 (wayVia && utilArrayIntersection(wayB.nodes, wayVia.nodes).length) {
-                         keepB = true;
-                         break;
-                       }
-                     }
-                   }
-                 }
+             function mapCacheHas(key) {
+               return getMapData(this, key).has(key);
+             }
+             /**
+              * 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.
+              */
 
-                 if (keepB) {
-                   relation = relation.replaceMember(wayA, wayB);
-                   graph = graph.replace(relation);
-                 } // 2. split a VIA
 
-               } 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;
-                   }
-                 }
-               } // 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)
+             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`.
 
-             } else {
-               if (relation === isOuter) {
-                 graph = graph.replace(relation.mergeTags(wayA.tags));
-                 graph = graph.replace(wayA.update({
-                   tags: {}
-                 }));
-                 graph = graph.replace(wayB.update({
-                   tags: {}
-                 }));
-               }
 
-               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);
-             }
-           });
+             MapCache.prototype.clear = mapCacheClear;
+             MapCache.prototype['delete'] = mapCacheDelete;
+             MapCache.prototype.get = mapCacheGet;
+             MapCache.prototype.has = mapCacheHas;
+             MapCache.prototype.set = mapCacheSet;
+             /*------------------------------------------------------------------------*/
 
-           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: {}
-             }));
-           }
+             /**
+              *
+              * Creates an array cache object to store unique values.
+              *
+              * @private
+              * @constructor
+              * @param {Array} [values] The values to cache.
+              */
 
-           _createdWayIDs.push(wayB.id);
+             function SetCache(values) {
+               var index = -1,
+                   length = values == null ? 0 : values.length;
+               this.__data__ = new MapCache();
 
-           return graph;
-         }
+               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.
+              */
 
-         var action = function action(graph) {
-           _createdWayIDs = [];
-           var newWayIndex = 0;
 
-           for (var i = 0; i < nodeIds.length; i++) {
-             var nodeId = nodeIds[i];
-             var candidates = action.waysForNode(nodeId, graph);
+             function setCacheAdd(value) {
+               this.__data__.set(value, HASH_UNDEFINED);
 
-             for (var j = 0; j < candidates.length; j++) {
-               graph = split(graph, nodeId, candidates[j], newWayIds && newWayIds[newWayIndex]);
-               newWayIndex += 1;
+               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 graph;
-         };
 
-         action.getCreatedWayIDs = function () {
-           return _createdWayIDs;
-         };
+             function setCacheHas(value) {
+               return this.__data__.has(value);
+             } // Add methods to `SetCache`.
 
-         action.waysForNode = function (nodeId, graph) {
-           var node = graph.entity(nodeId);
-           var splittableParents = graph.parentWays(node).filter(isSplittable);
 
-           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';
-             });
+             SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+             SetCache.prototype.has = setCacheHas;
+             /*------------------------------------------------------------------------*/
 
-             if (hasLine) {
-               return splittableParents.filter(function (parent) {
-                 return parent.geometry(graph) === 'line';
-               });
+             /**
+              * 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
+              */
 
-           return splittableParents;
 
-           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 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`.
+              */
 
-             if (parent.isClosed()) return true; // otherwise, we can't split nodes at their endpoints.
 
-             for (var i = 1; i < parent.nodes.length - 1; i++) {
-               if (parent.nodes[i] === nodeId) return true;
+             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.
+              */
 
-             return false;
-           }
-         };
 
-         action.ways = function (graph) {
-           return utilArrayUniq([].concat.apply([], nodeIds.map(function (nodeId) {
-             return action.waysForNode(nodeId, graph);
-           })));
-         };
+             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`.
+              */
 
-         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';
+             function stackHas(key) {
+               return this.__data__.has(key);
              }
-           }
-         };
-
-         action.limitWays = function (val) {
-           if (!arguments.length) return _wayIDs;
-           _wayIDs = val;
-           return action;
-         };
+             /**
+              * 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.
+              */
 
-         action.keepHistoryOn = function (val) {
-           if (!arguments.length) return _keepHistoryOn;
-           _keepHistoryOn = val;
-           return action;
-         };
 
-         return action;
-       }
+             function stackSet(key, value) {
+               var data = this.__data__;
 
-       function coreGraph(other, mutable) {
-         if (!(this instanceof coreGraph)) return new coreGraph(other, mutable);
+               if (data instanceof ListCache) {
+                 var pairs = data.__data__;
 
-         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]);
-         }
+                 if (!Map || pairs.length < LARGE_ARRAY_SIZE - 1) {
+                   pairs.push([key, value]);
+                   this.size = ++data.size;
+                   return 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
+                 data = this.__data__ = new MapCache(pairs);
+               }
 
-           if (!entity) {
-             entity = this.entities.__proto__[id]; // eslint-disable-line no-proto
-           }
+               data.set(key, value);
+               this.size = data.size;
+               return this;
+             } // Add methods to `Stack`.
 
-           if (!entity) {
-             throw new Error('entity ' + id + ' not found');
-           }
 
-           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] = {});
+             Stack.prototype.clear = stackClear;
+             Stack.prototype['delete'] = stackDelete;
+             Stack.prototype.get = stackGet;
+             Stack.prototype.has = stackHas;
+             Stack.prototype.set = stackSet;
+             /*------------------------------------------------------------------------*/
 
-           if (transients[key] !== undefined) {
-             return transients[key];
-           }
+             /**
+              * 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.
+              */
 
-           transients[key] = fn.call(entity);
-           return transients[key];
-         },
-         parentWays: function parentWays(entity) {
-           var parents = this._parentWays[entity.id];
-           var result = [];
+             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);
+                 }
+               }
 
-           if (parents) {
-             parents.forEach(function (id) {
-               result.push(this.entity(id));
-             }, this);
-           }
+               return result;
+             }
+             /**
+              * A specialized version of `_.sample` for arrays.
+              *
+              * @private
+              * @param {Array} array The array to sample.
+              * @returns {*} Returns the random element.
+              */
 
-           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 = [];
 
-           if (parents) {
-             parents.forEach(function (id) {
-               result.push(this.entity(id));
-             }, this);
-           }
+             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.
+              */
 
-           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 = [];
 
-           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;
+             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.
+              */
 
-           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;
+             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.
+              */
 
-             this._updateCalculated(undefined, entity, base.parentWays, base.parentRels); // Restore provisionally-deleted nodes that are discovered to have an extant parent
 
+             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.
+              */
 
-             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;
+             function assignValue(object, key, value) {
+               var objValue = object[key];
 
-                   if (ents.hasOwnProperty(id) && ents[id] === undefined) {
-                     delete ents[id];
-                   }
-                 }
+               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`.
+              */
 
-           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);
+
+             function assocIndexOf(array, key) {
+               var length = array.length;
+
+               while (length--) {
+                 if (eq(array[length][0], key)) {
+                   return length;
                  }
-               }, this);
+               }
+
+               return -1;
              }
-           }, 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;
+             /**
+              * 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`.
+              */
 
-           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 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`.
+              */
 
-             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 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 = 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 baseAssignIn(object, source) {
+               return object && copyObject(source, keysIn(source), object);
              }
-           } 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 `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.
+              */
 
-             if (oldentity && entity) {
-               removed = utilArrayDifference(oldentityMemberIDs, entityMemberIDs);
-               added = utilArrayDifference(entityMemberIDs, oldentityMemberIDs);
-             } else if (oldentity) {
-               removed = oldentityMemberIDs;
-               added = [];
-             } else if (entity) {
-               removed = [];
-               added = entityMemberIDs;
+
+             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.
+              */
 
-             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 baseAt(object, paths) {
+               var index = -1,
+                   length = paths.length,
+                   result = Array(length),
+                   skip = object == null;
+
+               while (++index < length) {
+                 result[index] = skip ? undefined$1 : get(object, paths[index]);
+               }
+
+               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.
+              */
 
-             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 baseClamp(number, lower, upper) {
+               if (number === number) {
+                 if (upper !== undefined$1) {
+                   number = number <= upper ? number : upper;
+                 }
+
+                 if (lower !== undefined$1) {
+                   number = number >= lower ? number : lower;
+                 }
+               }
+
+               return number;
              }
-           }
-         },
-         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 `_.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.
+              */
 
-             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 baseClone(value, bitmask, customizer, key, object, stack) {
+               var result,
+                   isDeep = bitmask & CLONE_DEEP_FLAG,
+                   isFlat = bitmask & CLONE_FLAT_FLAG,
+                   isFull = bitmask & CLONE_SYMBOLS_FLAG;
 
-             delete this.entities[id];
-           });
-         },
-         update: function update() {
-           var graph = this.frozen ? coreGraph(this, true) : this;
+               if (customizer) {
+                 result = object ? customizer(value, key, object, stack) : customizer(value);
+               }
 
-           for (var i = 0; i < arguments.length; i++) {
-             arguments[i].call(graph, graph);
-           }
+               if (result !== undefined$1) {
+                 return result;
+               }
 
-           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);
+               if (!isObject(value)) {
+                 return value;
+               }
 
-           for (var i in entities) {
-             this.entities[i] = entities[i];
+               var isArr = isArray(value);
 
-             this._updateCalculated(base.entities[i], this.entities[i]);
-           }
+               if (isArr) {
+                 result = initCloneArray(value);
 
-           return this;
-         }
-       };
+                 if (!isDeep) {
+                   return copyArray(value, result);
+                 }
+               } else {
+                 var tag = getTag(value),
+                     isFunc = tag == funcTag || tag == genTag;
 
-       function osmTurn(turn) {
-         if (!(this instanceof osmTurn)) {
-           return new osmTurn(turn);
-         }
+                 if (isBuffer(value)) {
+                   return cloneBuffer(value, isDeep);
+                 }
 
-         Object.assign(this, turn);
-       }
-       function osmIntersection(graph, startVertexId, maxDistance) {
-         maxDistance = maxDistance || 30; // in meters
+                 if (tag == objectTag || tag == argsTag || isFunc && !object) {
+                   result = isFlat || isFunc ? {} : initCloneObject(value);
 
-         var vgraph = coreGraph(); // virtual graph
+                   if (!isDeep) {
+                     return isFlat ? copySymbolsIn(value, baseAssignIn(result, value)) : copySymbols(value, baseAssign(result, value));
+                   }
+                 } else {
+                   if (!cloneableTags[tag]) {
+                     return object ? value : {};
+                   }
 
-         var i, j, k;
+                   result = initCloneByTag(value, tag, isDeep);
+                 }
+               } // Check for circular references and return its corresponding clone.
 
-         function memberOfRestriction(entity) {
-           return graph.parentRelations(entity).some(function (r) {
-             return r.isRestriction();
-           });
-         }
 
-         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];
-         }
+               stack || (stack = new Stack());
+               var stacked = stack.get(value);
 
-         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
+               if (stacked) {
+                 return stacked;
+               }
 
-         var actions = []; // STEP 1:  walk the graph outwards from starting vertex to search
-         //  for more key vertices and ways to include in the intersection..
+               stack.set(value, result);
 
-         while (checkVertices.length) {
-           vertex = checkVertices.pop(); // check this vertex for parent ways that are roads
+               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));
+                 });
+               }
 
-           checkWays = graph.parentWays(vertex);
-           var hasWays = false;
+               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).
 
-           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
+                 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.
+              */
 
-             nodes = utilArrayUniq(graph.childNodes(way));
 
-             for (j = 0; j < nodes.length; j++) {
-               node = nodes[j];
-               if (node === vertex) continue; // same thing
+             function baseConforms(source) {
+               var props = keys(source);
+               return function (object) {
+                 return baseConformsTo(object, source, props);
+               };
+             }
+             /**
+              * 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 (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
+             function baseConformsTo(object, source, props) {
+               var length = props.length;
 
-               var hasParents = false;
-               parents = graph.parentWays(node);
+               if (object == null) {
+                 return !length;
+               }
 
-               for (k = 0; k < parents.length; k++) {
-                 parent = parents[k];
-                 if (parent === way) continue; // same thing
+               object = Object(object);
 
-                 if (ways.indexOf(parent) !== -1) continue; // seen it already
+               while (length--) {
+                 var key = props[length],
+                     predicate = source[key],
+                     value = object[key];
 
-                 if (!isRoad(parent)) continue; // not a road
+                 if (value === undefined$1 && !(key in object) || !predicate(value)) {
+                   return false;
+                 }
+               }
 
-                 hasParents = true;
-                 break;
+               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.
+              */
+
+
+             function baseDelay(func, wait, args) {
+               if (typeof func != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
                }
 
-               if (hasParents) {
-                 checkVertices.push(node);
+               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.
+              */
+
+
+             function baseDifference(array, values, iteratee, comparator) {
+               var index = -1,
+                   includes = arrayIncludes,
+                   isCommon = true,
+                   length = array.length,
+                   result = [],
+                   valuesLength = values.length;
+
+               if (!length) {
+                 return result;
+               }
+
+               if (iteratee) {
+                 values = arrayMap(values, baseUnary(iteratee));
+               }
+
+               if (comparator) {
+                 includes = arrayIncludesWith;
+                 isCommon = false;
+               } else if (values.length >= LARGE_ARRAY_SIZE) {
+                 includes = cacheHas;
+                 isCommon = false;
+                 values = new SetCache(values);
+               }
+
+               outer: while (++index < length) {
+                 var value = array[index],
+                     computed = iteratee == null ? value : iteratee(value);
+                 value = comparator || value !== 0 ? value : 0;
+
+                 if (isCommon && computed === computed) {
+                   var valuesIndex = valuesLength;
+
+                   while (valuesIndex--) {
+                     if (values[valuesIndex] === computed) {
+                       continue outer;
+                     }
+                   }
+
+                   result.push(value);
+                 } else if (!includes(values, computed, comparator)) {
+                   result.push(value);
+                 }
                }
+
+               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`.
+              */
 
-           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
+             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`.
+              */
 
-         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));
+             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 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.
+              */
+
+
+             function baseExtremum(array, iteratee, comparator) {
+               var index = -1,
+                   length = array.length;
+
+               while (++index < length) {
+                 var value = array[index],
+                     current = iteratee(value);
+
+                 if (current != null && (computed === undefined$1 ? current === current && !isSymbol(current) : comparator(current, computed))) {
+                   var computed = current,
+                       result = value;
+                 }
                }
+
+               return result;
              }
-           });
-         }); // STEP 3:  Force all oneways to be drawn in the forward direction
+             /**
+              * 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`.
+              */
 
-         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 baseFill(array, value, start, end) {
+               var length = array.length;
+               start = toInteger(start);
 
-         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 (start < 0) {
+                 start = -start > length ? 0 : length + start;
+               }
 
-           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
+               end = end === undefined$1 || end > length ? length : toInteger(end);
 
-         osmEntity.id.next.way = origCount; // STEP 5:  Update arrays to point to vgraph entities
+               if (end < 0) {
+                 end += length;
+               }
 
-         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.
+               end = start > end ? 0 : toLength(end);
 
-         function withMetadata(way, vertexIds) {
-           var __oneWay = way.isOneWay(); // which affixes are key vertices?
+               while (start < end) {
+                 array[start++] = value;
+               }
 
+               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.
+              */
 
-           var __first = vertexIds.indexOf(way.first()) !== -1;
 
-           var __last = vertexIds.indexOf(way.last()) !== -1; // what roles is this way eligible for?
+             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.
+              */
 
 
-           var __via = __first && __last;
+             function baseFlatten(array, depth, predicate, isStrict, result) {
+               var index = -1,
+                   length = array.length;
+               predicate || (predicate = isFlattenable);
+               result || (result = []);
 
-           var __from = __first && !__oneWay || __last;
+               while (++index < length) {
+                 var value = array[index];
 
-           var __to = __first || __last && !__oneWay;
+                 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;
+                 }
+               }
 
-           return way.update({
-             __first: __first,
-             __last: __last,
-             __from: __from,
-             __via: __via,
-             __to: __to,
-             __oneWay: __oneWay
-           });
-         }
+               return result;
+             }
+             /**
+              * 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`.
+              */
 
-         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 = [];
+             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`.
+              */
 
-         do {
-           keepGoing = false;
-           checkVertices = vertexIds.slice();
+             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`.
+              */
 
-           for (i = 0; i < checkVertices.length; i++) {
-             var vertexId = checkVertices[i];
-             vertex = vgraph.hasEntity(vertexId);
+             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`.
+              */
 
-             if (!vertex) {
-               if (vertexIds.indexOf(vertexId) !== -1) {
-                 vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+
+             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.
+              */
+
+
+             function baseFunctions(object, props) {
+               return arrayFilter(props, function (key) {
+                 return isFunction(object[key]);
+               });
+             }
+             /**
+              * 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.
+              */
+
+
+             function baseGet(object, path) {
+               path = castPath(path, object);
+               var index = 0,
+                   length = path.length;
+
+               while (object != null && index < length) {
+                 object = object[toKey(path[index++])];
                }
 
-               removeVertexIds.push(vertexId);
-               continue;
+               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.
+              */
 
-             parents = vgraph.parentWays(vertex);
 
-             if (parents.length < 3) {
-               if (vertexIds.indexOf(vertexId) !== -1) {
-                 vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
-               }
+             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`.
+              */
 
-             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 baseGetTag(value) {
+               if (value == null) {
+                 return value === undefined$1 ? undefinedTag : nullTag;
                }
 
-               if (leaf && survivor) {
-                 survivor = withMetadata(survivor, vertexIds); // update survivor way
+               return symToStringTag && symToStringTag in Object(value) ? getRawTag(value) : objectToString(value);
+             }
+             /**
+              * 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`.
+              */
 
-                 vgraph = vgraph.replace(survivor).remove(leaf); // update graph
 
-                 removeWayIds.push(leaf.id);
-                 keepGoing = true;
-               }
+             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`.
+              */
 
-             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 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`.
+              */
 
-               removeVertexIds.push(vertexId);
-               keepGoing = true;
+
+             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`.
+              */
 
-             if (parents.length < 1) {
-               // vertex is no longer attached to anything
-               vgraph = vgraph.remove(vertex);
+
+             function baseInRange(number, start, end) {
+               return number >= nativeMin(start, end) && number < nativeMax(start, end);
              }
-           }
-         } while (keepGoing);
+             /**
+              * 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.
+              */
 
-         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 baseIntersection(arrays, iteratee, comparator) {
+               var includes = comparator ? arrayIncludesWith : arrayIncludes,
+                   length = arrays[0].length,
+                   othLength = arrays.length,
+                   othIndex = othLength,
+                   caches = Array(othLength),
+                   maxLength = Infinity,
+                   result = [];
 
-         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)
+               while (othIndex--) {
+                 var array = arrays[othIndex];
 
-           var maxPathLength = maxViaWay * 2 + 3;
-           var turns = [];
-           step(start);
-           return turns; // traverse the intersection graph and find all the valid paths
+                 if (othIndex && iteratee) {
+                   array = arrayMap(array, baseUnary(iteratee));
+                 }
 
-           function step(entity, currPath, currRestrictions, matchedRestriction) {
-             currPath = (currPath || []).slice(); // shallow copy
+                 maxLength = nativeMin(array.length, maxLength);
+                 caches[othIndex] = !comparator && (iteratee || length >= 120 && array.length >= 120) ? new SetCache(othIndex && array) : undefined$1;
+               }
 
-             if (currPath.length >= maxPathLength) return;
-             currPath.push(entity.id);
-             currRestrictions = (currRestrictions || []).slice(); // shallow copy
+               array = arrays[0];
+               var index = -1,
+                   seen = caches[0];
 
-             var i, j;
+               outer: while (++index < length && result.length < maxLength) {
+                 var value = array[index],
+                     computed = iteratee ? iteratee(value) : value;
+                 value = comparator || value !== 0 ? value : 0;
 
-             if (entity.type === 'node') {
-               var parents = vgraph.parentWays(entity);
-               var nextWays = []; // which ways can we step into?
+                 if (!(seen ? cacheHas(seen, computed) : includes(result, computed, comparator))) {
+                   othIndex = othLength;
 
-               for (i = 0; i < parents.length; i++) {
-                 var way = parents[i]; // if next way is a oneway incoming to this vertex, skip
+                   while (--othIndex) {
+                     var cache = caches[othIndex];
 
-                 if (way.__oneWay && way.nodes[0] !== entity.id) continue; // if we have seen it before (allowing for an initial u-turn), skip
+                     if (!(cache ? cacheHas(cache, computed) : includes(arrays[othIndex], computed, comparator))) {
+                       continue outer;
+                     }
+                   }
 
-                 if (currPath.indexOf(way.id) !== -1 && currPath.length >= 3) continue; // Check all "current" restrictions (where we've already walked the `FROM`)
+                   if (seen) {
+                     seen.push(computed);
+                   }
 
-                 var restrict = null;
+                   result.push(value);
+                 }
+               }
 
-                 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?
+               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`.
+              */
 
-                   var matchesFrom = f.id === fromWayId;
-                   var matchesViaTo = false;
-                   var isAlongOnlyPath = 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 = [];
+             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.
+              */
 
-                       for (k = 2; k < currPath.length; k += 2) {
-                         // k = 2 skips FROM
-                         pathVias.push(currPath[k]); // (path goes way-node-way...)
-                       }
 
-                       var restrictionVias = [];
+             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 < v.length; k++) {
-                         if (v[k].type === 'way') {
-                           restrictionVias.push(v[k].id);
-                         }
-                       }
 
-                       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;
-                       }
-                     }
-                   }
+             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 (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 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 (restrict && restrict.direct) break;
-                 }
 
-                 nextWays.push({
-                   way: way,
-                   restrict: restrict
-                 });
+             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`.
+              */
+
+
+             function baseIsEqual(value, other, bitmask, customizer, stack) {
+               if (value === other) {
+                 return true;
                }
 
-               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)
+               if (value == null || other == null || !isObjectLike(value) && !isObjectLike(other)) {
+                 return value !== value && other !== other;
+               }
 
-                 if (matchedRestriction && matchedRestriction.direct === false) {
-                   for (i = 0; i < turnPath.length; i++) {
-                     if (turnPath[i] === matchedRestriction.from) {
-                       turnPath = turnPath.slice(i);
-                       break;
-                     }
-                   }
-                 }
+               return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
+             }
+             /**
+              * 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`.
+              */
 
-                 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 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;
 
-                   turns.push(osmTurn(turn));
+               if (isSameTag && isBuffer(object)) {
+                 if (!isBuffer(other)) {
+                   return false;
                  }
 
-                 if (currPath[0] === currPath[2]) return; // if we made a u-turn - stop here
+                 objIsArr = true;
+                 objIsObj = false;
                }
 
-               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 = [];
-
-               if (currPath.length > 1) {
-                 if (dist > maxDistance) return; // the next node is too far
-
-                 if (!entity.__via) return; // this way is a leaf / can't be a via
+               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);
                }
 
-               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
+               if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
+                 var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+                     othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+                 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 (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
+               if (!isSameTag) {
+                 return false;
                }
 
-               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
+               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 isOnlyVia = false;
-                   var v = r.membersByRole('via');
 
-                   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);
+             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`.
+              */
 
-                       if (viaWay.first() === nextNode.id || viaWay.last() === nextNode.id) {
-                         isOnlyVia = true;
-                         break;
-                       }
-                     }
-                   }
 
-                   return isOnlyVia;
-                 });
-                 step(nextNode, currPath, currRestrictions.concat(fromRestrictions), false);
-               });
-             }
-           } // assumes path is alternating way-node-way of odd length
+             function baseIsMatch(object, source, matchData, customizer) {
+               var index = matchData.length,
+                   length = index,
+                   noCustomizer = !customizer;
 
+               if (object == null) {
+                 return !length;
+               }
 
-           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];
+               object = Object(object);
 
-             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--) {
+                 var data = matchData[index];
 
-               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 (noCustomizer && data[2] ? data[1] !== object[data[0]] : !(data[0] in object)) {
+                   return false;
+                 }
                }
-             }
 
-             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
-             };
+               while (++index < length) {
+                 data = matchData[index];
+                 var key = data[0],
+                     objValue = object[key],
+                     srcValue = data[1];
 
-             function adjacentNode(wayId, affixId) {
-               var nodes = vgraph.entity(wayId).nodes;
-               return affixId === nodes[0] ? nodes[1] : nodes[nodes.length - 2];
-             }
-           }
-         };
+                 if (noCustomizer && data[2]) {
+                   if (objValue === undefined$1 && !(key in object)) {
+                     return false;
+                   }
+                 } else {
+                   var stack = new Stack();
 
-         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;
+                   if (customizer) {
+                     var result = customizer(objValue, srcValue, key, object, source, stack);
+                   }
 
-         while (angle < 0) {
-           angle += 360;
-         }
+                   if (!(result === undefined$1 ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack) : result)) {
+                     return false;
+                   }
+                 }
+               }
 
-         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
+               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`.
+              */
 
-         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 (angle < 158) return 'no_right_turn';
-         if (angle > 202) return 'no_left_turn';
-         return 'no_straight_on';
-       }
+             function baseIsNative(value) {
+               if (!isObject(value) || isMasked(value)) {
+                 return false;
+               }
 
-       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';
+               var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
+               return pattern.test(toSource(value));
              }
-           });
-           return Object.assign({
-             closedWay: [],
-             multipolygon: [],
-             other: []
-           }, geometryGroups);
-         }
+             /**
+              * 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`.
+              */
 
-         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.
 
-           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.
+             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`.
+              */
 
-           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;
+             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`.
+              */
 
-           while (polygons.length) {
-             extractUncontained(polygons);
-             polygons = polygons.filter(isContained);
-             contained = contained.filter(isContained).map(filterContained);
-           }
 
-           function isContained(d, i) {
-             return contained[i].some(function (val) {
-               return val;
-             });
-           }
+             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.
+              */
 
-           function filterContained(d) {
-             return d.filter(isContained);
-           }
 
-           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'
-                   });
-                 });
+             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;
+               }
+
+               if (value == null) {
+                 return identity;
+               }
+
+               if (_typeof(value) == 'object') {
+                 return isArray(value) ? baseMatchesProperty(value[0], value[1]) : baseMatches(value);
+               }
+
+               return property(value);
+             }
+             /**
+              * 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.
+              */
+
+
+             function baseKeys(object) {
+               if (!isPrototype(object)) {
+                 return nativeKeys(object);
                }
-             });
-             outer = !outer;
-           } // Move all tags to one relation
 
+               var result = [];
 
-           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';
-             }
+               for (var key in Object(object)) {
+                 if (hasOwnProperty.call(object, key) && key != 'constructor') {
+                   result.push(key);
+                 }
+               }
 
-             if (members.some(isThisOuter)) {
-               relation = relation.mergeTags(way.tags);
-               graph = graph.replace(way.update({
-                 tags: {}
-               }));
+               return result;
              }
-           });
-           return graph.replace(relation.update({
-             members: members,
-             tags: utilObjectOmit(relation.tags, ['area'])
-           }));
-         };
+             /**
+              * 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.
+              */
 
-         action.disabled = function (graph) {
-           var entities = groupEntities(graph);
 
-           if (entities.other.length > 0 || entities.closedWay.length + entities.multipolygon.length < 2) {
-             return 'not_eligible';
-           }
+             function baseKeysIn(object) {
+               if (!isObject(object)) {
+                 return nativeKeysIn(object);
+               }
 
-           if (!entities.multipolygon.every(function (r) {
-             return r.isComplete(graph);
-           })) {
-             return 'incomplete_relation';
-           }
+               var isProto = isPrototype(object),
+                   result = [];
 
-           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));
+               for (var key in object) {
+                 if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
+                   result.push(key);
+                 }
                }
-             });
-             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 `_.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`.
+              */
 
-         return action;
-       }
 
-       var UNSUPPORTED_Y$3 = regexpStickyHelpers.UNSUPPORTED_Y;
+             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.
+              */
 
-       // `RegExp.prototype.flags` getter
-       // https://tc39.es/ecma262/#sec-get-regexp.prototype.flags
-       if (descriptors && (/./g.flags != 'g' || UNSUPPORTED_Y$3)) {
-         objectDefineProperty.f(RegExp.prototype, 'flags', {
-           configurable: true,
-           get: regexpFlags
-         });
-       }
 
-       var fastDeepEqual = function equal(a, b) {
-         if (a === b) return true;
+             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 (a && b && _typeof(a) == 'object' && _typeof(b) == 'object') {
-           if (a.constructor !== b.constructor) return false;
-           var length, i, keys;
 
-           if (Array.isArray(a)) {
-             length = a.length;
-             if (length != b.length) return false;
+             function baseMatches(source) {
+               var matchData = getMatchData(source);
 
-             for (i = length; i-- !== 0;) {
-               if (!equal(a[i], b[i])) return false;
+               if (matchData.length == 1 && matchData[0][2]) {
+                 return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+               }
+
+               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.
+              */
 
-             return true;
-           }
 
-           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;
+             function baseMatchesProperty(path, srcValue) {
+               if (isKey(path) && isStrictComparable(srcValue)) {
+                 return matchesStrictComparable(toKey(path), srcValue);
+               }
 
-           for (i = length; i-- !== 0;) {
-             if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
-           }
+               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.
+              */
 
-           for (i = length; i-- !== 0;) {
-             var key = keys[i];
-             if (!equal(a[key], b[key])) return false;
-           }
 
-           return true;
-         } // true if both NaN, false otherwise
+             function baseMerge(object, source, srcIndex, customizer, stack) {
+               if (object === source) {
+                 return;
+               }
 
+               baseFor(source, function (srcValue, key) {
+                 stack || (stack = new Stack());
 
-         return a !== a && b !== b;
-       };
+                 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;
 
-       // 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
+                   if (newValue === undefined$1) {
+                     newValue = srcValue;
+                   }
 
-       function LCS(buffer1, buffer2) {
-         var equivalenceClasses = {};
+                   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.
+              */
 
-         for (var j = 0; j < buffer2.length; j++) {
-           var item = buffer2[j];
 
-           if (equivalenceClasses[item]) {
-             equivalenceClasses[item].push(j);
-           } else {
-             equivalenceClasses[item] = [j];
-           }
-         }
+             function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
+               var objValue = safeGet(object, key),
+                   srcValue = safeGet(source, key),
+                   stacked = stack.get(srcValue);
 
-         var NULLRESULT = {
-           buffer1index: -1,
-           buffer2index: -1,
-           chain: null
-         };
-         var candidates = [NULLRESULT];
+               if (stacked) {
+                 assignMergeValue(object, key, stacked);
+                 return;
+               }
 
-         for (var i = 0; i < buffer1.length; i++) {
-           var _item = buffer1[i];
-           var buffer2indices = equivalenceClasses[_item] || [];
-           var r = 0;
-           var c = candidates[0];
+               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;
 
-           for (var jx = 0; jx < buffer2indices.length; jx++) {
-             var _j = buffer2indices[jx];
-             var s = void 0;
+                   if (isArguments(objValue)) {
+                     newValue = toPlainObject(objValue);
+                   } else if (!isObject(objValue) || isFunction(objValue)) {
+                     newValue = initCloneObject(srcValue);
+                   }
+                 } else {
+                   isCommon = false;
+                 }
+               }
 
-             for (s = r; s < candidates.length; s++) {
-               if (candidates[s].buffer2index < _j && (s === candidates.length - 1 || candidates[s + 1].buffer2index > _j)) {
-                 break;
+               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);
                }
+
+               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`.
+              */
 
-             if (s < candidates.length) {
-               var newCandidate = {
-                 buffer1index: i,
-                 buffer2index: _j,
-                 chain: candidates[s]
-               };
 
-               if (r === candidates.length) {
-                 candidates.push(c);
-               } else {
-                 candidates[r] = c;
+             function baseNth(array, n) {
+               var length = array.length;
+
+               if (!length) {
+                 return;
                }
 
-               r = s + 1;
-               c = newCandidate;
+               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 (r === candidates.length) {
-                 break; // no point in examining further (j)s
+
+             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);
+                     };
+                   }
+
+                   return iteratee;
+                 });
+               } else {
+                 iteratees = [identity];
                }
-             }
-           }
 
-           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].
+               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.
+              */
 
 
-         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 basePick(object, paths) {
+               return basePickBy(object, paths, function (value, path) {
+                 return hasIn(object, path);
+               });
+             }
+             /**
+              * 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 diffIndices(buffer1, buffer2) {
-         var lcs = LCS(buffer1, buffer2);
-         var result = [];
-         var tail1 = buffer1.length;
-         var tail2 = buffer2.length;
+             function basePickBy(object, paths, predicate) {
+               var index = -1,
+                   length = paths.length,
+                   result = {};
 
-         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;
+               while (++index < length) {
+                 var path = paths[index],
+                     value = baseGet(object, path);
 
-           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)
-             });
-           }
-         }
+                 if (predicate(value, path)) {
+                   baseSet(result, castPath(path, object), value);
+                 }
+               }
 
-         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 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.
+              */
 
 
-       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 basePropertyDeep(path) {
+               return function (object) {
+                 return baseGet(object, path);
+               };
+             }
+             /**
+              * 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`.
+              */
 
-         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])
 
-           });
-         }
+             function basePullAll(array, values, iteratee, comparator) {
+               var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
+                   index = -1,
+                   length = values.length,
+                   seen = array;
 
-         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 (array === values) {
+                 values = copyArray(values);
+               }
 
-         function advanceTo(endOffset) {
-           if (endOffset > currOffset) {
-             results.push({
-               stable: true,
-               buffer: 'o',
-               bufferStart: currOffset,
-               bufferLength: endOffset - currOffset,
-               bufferContent: o.slice(currOffset, endOffset)
-             });
-             currOffset = endOffset;
-           }
-         }
+               if (iteratee) {
+                 seen = arrayMap(array, baseUnary(iteratee));
+               }
 
-         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 (++index < length) {
+                 var fromIndex = 0,
+                     value = values[index],
+                     computed = iteratee ? iteratee(value) : value;
 
-           while (hunks.length) {
-             var nextHunk = hunks[0];
-             var nextHunkStart = nextHunk.oStart;
-             if (nextHunkStart > regionEnd) break; // no overlap
+                 while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
+                   if (seen !== array) {
+                     splice.call(seen, fromIndex, 1);
+                   }
 
-             regionEnd = Math.max(regionEnd, nextHunkStart + nextHunk.oLength);
-             regionHunks.push(hunks.shift());
-           }
+                   splice.call(array, fromIndex, 1);
+                 }
+               }
 
-           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)
-               });
+               return array;
              }
-           } 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 `_.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`.
+              */
 
-             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 basePullAt(array, indexes) {
+               var length = array ? indexes.length : 0,
+                   lastIndex = length - 1;
+
+               while (length--) {
+                 var index = indexes[length];
+
+                 if (length == lastIndex || index !== previous) {
+                   var previous = index;
+
+                   if (isIndex(index)) {
+                     splice.call(array, index, 1);
+                   } else {
+                     baseUnset(array, index);
+                   }
+                 }
+               }
+
+               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.
+              */
 
-             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 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.
+              */
 
-         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`
 
+             function baseRange(start, end, step, fromRight) {
+               var index = -1,
+                   length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
+                   result = Array(length);
 
-       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 = [];
+               while (length--) {
+                 result[fromRight ? length : ++index] = start;
+                 start += step;
+               }
 
-         function flushOk() {
-           if (okBuffer.length) {
-             results.push({
-               ok: okBuffer
-             });
-           }
+               return result;
+             }
+             /**
+              * 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.
+              */
 
-           okBuffer = [];
-         }
 
-         function isFalseConflict(a, b) {
-           if (a.length !== b.length) return false;
+             function baseRepeat(string, n) {
+               var result = '';
 
-           for (var i = 0; i < a.length; i++) {
-             if (a[i] !== b[i]) return false;
-           }
+               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.
 
-           return true;
-         }
 
-         regions.forEach(function (region) {
-           if (region.stable) {
-             var _okBuffer;
+               do {
+                 if (n % 2) {
+                   result += string;
+                 }
 
-             (_okBuffer = okBuffer).push.apply(_okBuffer, _toConsumableArray(region.bufferContent));
-           } else {
-             if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
-               var _okBuffer2;
+                 n = nativeFloor(n / 2);
 
-               (_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
+                 if (n) {
+                   string += string;
                  }
-               });
-             }
-           }
-         });
-         flushOk();
-         return results;
-       }
+               } while (n);
 
-       function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
-         discardTags = discardTags || {};
-         var _option = 'safe'; // 'safe', 'force_local', 'force_remote'
+               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.
+              */
 
-         var _conflicts = [];
 
-         function user(d) {
-           return typeof formatUser === 'function' ? formatUser(d) : d;
-         }
+             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 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;
-           }
 
-           if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
-             return target;
-           }
+             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.
+              */
 
-           if (_option === 'force_remote') {
-             return target.update({
-               loc: remote.loc
-             });
-           }
 
-           _conflicts.push(_t('merge_remote_changes.conflict.location', {
-             user: user(remote.user)
-           }));
+             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 target;
-         }
 
-         function mergeNodes(base, remote, target) {
-           if (_option === 'force_local' || fastDeepEqual(target.nodes, remote.nodes)) {
-             return target;
-           }
+             function baseSet(object, path, value, customizer) {
+               if (!isObject(object)) {
+                 return object;
+               }
 
-           if (_option === 'force_remote') {
-             return target.update({
-               nodes: remote.nodes
-             });
-           }
+               path = castPath(path, object);
+               var index = -1,
+                   length = path.length,
+                   lastIndex = length - 1,
+                   nested = object;
 
-           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
-           });
+               while (nested != null && ++index < length) {
+                 var key = toKey(path[index]),
+                     newValue = value;
 
-           for (var i = 0; i < hunks.length; i++) {
-             var hunk = hunks[i];
+                 if (key === '__proto__' || key === 'constructor' || key === 'prototype') {
+                   return object;
+                 }
 
-             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 (index != lastIndex) {
+                   var objValue = nested[key];
+                   newValue = customizer ? customizer(objValue, key, nested) : undefined$1;
 
-               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)
-                 }));
+                   if (newValue === undefined$1) {
+                     newValue = isObject(objValue) ? objValue : isIndex(path[index + 1]) ? [] : {};
+                   }
+                 }
 
-                 break;
+                 assignValue(nested, key, newValue);
+                 nested = nested[key];
                }
-             }
-           }
 
-           return _conflicts.length === ccount ? target.update({
-             nodes: nodes
-           }) : target;
-         }
+               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 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;
+             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`.
+              */
 
-           for (var i = 0; i < children.length; i++) {
-             var id = children[i];
-             var node = graph.hasEntity(id); // remove unused childNodes..
+             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.
+              */
 
-             if (targetWay.nodes.indexOf(id) === -1) {
-               if (node && !isUsed(node, targetWay)) {
-                 updates.removeIds.push(id);
-               }
+             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`.
+              */
 
-               continue;
-             } // restore used childNodes..
 
+             function baseSlice(array, start, end) {
+               var index = -1,
+                   length = array.length;
 
-             var local = localGraph.hasEntity(id);
-             var remote = remoteGraph.hasEntity(id);
-             var target;
+               if (start < 0) {
+                 start = -start > length ? 0 : length + start;
+               }
 
-             if (_option === 'force_remote' && remote && remote.visible) {
-               updates.replacements.push(remote);
-             } else if (_option === 'force_local' && local) {
-               target = osmEntity(local);
+               end = end > length ? length : end;
 
-               if (remote) {
-                 target = target.update({
-                   version: remote.version
-                 });
+               if (end < 0) {
+                 end += length;
                }
 
-               updates.replacements.push(target);
-             } else if (_option === 'safe' && local && remote && local.version !== remote.version) {
-               target = osmEntity(local, {
-                 version: remote.version
-               });
+               length = start > end ? 0 : end - start >>> 0;
+               start >>>= 0;
+               var result = Array(length);
 
-               if (remote.visible) {
-                 target = mergeLocation(remote, target);
-               } else {
-                 _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
-                   user: user(remote.user)
-                 }));
+               while (++index < length) {
+                 result[index] = array[index + start];
                }
 
-               if (_conflicts.length !== ccount) break;
-               updates.replacements.push(target);
+               return result;
              }
-           }
-
-           return targetWay;
-         }
-
-         function updateChildren(updates, graph) {
-           for (var i = 0; i < updates.replacements.length; i++) {
-             graph = graph.replace(updates.replacements[i]);
-           }
+             /**
+              * 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`.
+              */
 
-           if (updates.removeIds.length) {
-             graph = actionDeleteMultiple(updates.removeIds)(graph);
-           }
 
-           return graph;
-         }
+             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`.
+              */
 
-         function mergeMembers(remote, target) {
-           if (_option === 'force_local' || fastDeepEqual(target.members, remote.members)) {
-             return target;
-           }
 
-           if (_option === 'force_remote') {
-             return target.update({
-               members: remote.members
-             });
-           }
+             function baseSortedIndex(array, value, retHighest) {
+               var low = 0,
+                   high = array == null ? low : array.length;
 
-           _conflicts.push(_t('merge_remote_changes.conflict.memberlist', {
-             user: user(remote.user)
-           }));
+               if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
+                 while (low < high) {
+                   var mid = low + high >>> 1,
+                       computed = array[mid];
 
-           return target;
-         }
+                   if (computed !== null && !isSymbol(computed) && (retHighest ? computed <= value : computed < value)) {
+                     low = mid + 1;
+                   } else {
+                     high = mid;
+                   }
+                 }
 
-         function mergeTags(base, remote, target) {
-           if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
-             return target;
-           }
+                 return high;
+               }
 
-           if (_option === 'force_remote') {
-             return target.update({
-               tags: remote.tags
-             });
-           }
+               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`.
+              */
 
-           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;
+             function baseSortedIndexBy(array, value, iteratee, retHighest) {
+               var low = 0,
+                   high = array == null ? 0 : array.length;
 
-           for (var i = 0; i < keys.length; i++) {
-             var k = keys[i];
+               if (high === 0) {
+                 return 0;
+               }
 
-             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];
+               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 {
-                   delete tags[k];
+                   setLow = retHighest ? computed <= value : computed < value;
                  }
 
-                 changed = true;
+                 if (setLow) {
+                   low = mid + 1;
+                 } else {
+                   high = mid;
+                 }
                }
+
+               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.
+              */
 
-           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 baseSortedUniq(array, iteratee) {
+               var index = -1,
+                   length = array.length,
+                   resIndex = 0,
+                   result = [];
 
-         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
+               while (++index < length) {
+                 var value = array[index],
+                     computed = iteratee ? iteratee(value) : value;
 
-           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 (!index || !eq(computed, seen)) {
+                   var seen = computed;
+                   result[resIndex++] = value === 0 ? 0 : value;
+                 }
                }
 
-               return graph.replace(target);
-             } else {
-               _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
-                 user: user(remote.user)
-               }));
-
-               return graph; // do nothing
+               return result;
              }
-           } // merge
-
+             /**
+              * 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.
+              */
 
-           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);
+             function baseToNumber(value) {
+               if (typeof value == 'number') {
+                 return value;
+               }
 
-           if (!_conflicts.length) {
-             graph = updateChildren(updates, graph).replace(target);
-           }
+               if (isSymbol(value)) {
+                 return NAN;
+               }
 
-           return graph;
-         };
+               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.
+              */
 
-         action.withOption = function (opt) {
-           _option = opt;
-           return action;
-         };
 
-         action.conflicts = function () {
-           return _conflicts;
-         };
+             function baseToString(value) {
+               // Exit early for strings to avoid a performance hit in some environments.
+               if (typeof value == 'string') {
+                 return value;
+               }
 
-         return action;
-       }
+               if (isArray(value)) {
+                 // Recursively convert values (susceptible to call stack limits).
+                 return arrayMap(value, baseToString) + '';
+               }
 
-       // https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as
+               if (isSymbol(value)) {
+                 return symbolToString ? symbolToString.call(value) : '';
+               }
 
-       function actionMove(moveIDs, tryDelta, projection, cache) {
-         var _delta = tryDelta;
+               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 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 baseUniq(array, iteratee, comparator) {
+               var index = -1,
+                   includes = arrayIncludes,
+                   length = array.length,
+                   isCommon = true,
+                   result = [],
+                   seen = result;
 
-             var parentsMoving = parents.every(function (way) {
-               return cache.moving[way.id];
-             });
-             if (!parentsMoving) delete cache.moving[nodeID];
-             return parentsMoving;
-           }
+               if (comparator) {
+                 isCommon = false;
+                 includes = arrayIncludesWith;
+               } else if (length >= LARGE_ARRAY_SIZE) {
+                 var set = iteratee ? null : createSet(array);
 
-           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 (set) {
+                   return setToArray(set);
+                 }
 
-               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);
+                 isCommon = false;
+                 includes = cacheHas;
+                 seen = new SetCache();
                } else {
-                 cacheEntities(entity.members.map(function (member) {
-                   return member.id;
-                 }));
+                 seen = iteratee ? [] : result;
                }
-             }
-           }
-
-           function cacheIntersections(ids) {
-             function isEndpoint(way, id) {
-               return !way.isClosed() && !!way.affix(id);
-             }
-
-             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));
+               outer: while (++index < length) {
+                 var value = array[index],
+                     computed = iteratee ? iteratee(value) : value;
+                 value = comparator || value !== 0 ? value : 0;
 
-               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;
+                 if (isCommon && computed === computed) {
+                   var seenIndex = seen.length;
 
-                 for (var k = 0; k < parents.length; k++) {
-                   var way = parents[k];
+                   while (seenIndex--) {
+                     if (seen[seenIndex] === computed) {
+                       continue outer;
+                     }
+                   }
 
-                   if (!cache.moving[way.id]) {
-                     unmoved = way;
-                     break;
+                   if (iteratee) {
+                     seen.push(computed);
                    }
-                 }
 
-                 if (!unmoved) continue; // exclude ways that are overly connected..
+                   result.push(value);
+                 } else if (!includes(seen, computed, comparator)) {
+                   if (seen !== result) {
+                     seen.push(computed);
+                   }
 
-                 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)
-                 });
+                   result.push(value);
+                 }
                }
-             }
-           }
 
-           if (!cache) {
-             cache = {};
-           }
+               return result;
+             }
+             /**
+              * 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`.
+              */
 
-           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 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 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 (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;
-           }
+             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`.
+              */
 
-           var prev = graph.hasEntity(way.nodes[prevIndex]);
-           var next = graph.hasEntity(way.nodes[nextIndex]); // Don't add orig vertex at endpoint..
 
-           if (!prev || !next) return graph;
-           var key = wayId + '_' + nodeId;
-           var orig = cache.replacedVertex[key];
+             function baseWhile(array, predicate, isDrop, fromRight) {
+               var length = array.length,
+                   index = fromRight ? length : -1;
 
-           if (!orig) {
-             orig = osmNode();
-             cache.replacedVertex[key] = orig;
-             cache.startLoc[orig.id] = cache.startLoc[nodeId];
-           }
+               while ((fromRight ? index-- : ++index < length) && predicate(array[index], index, array)) {}
 
-           var start, end;
+               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.
+              */
 
-           if (delta) {
-             start = projection(cache.startLoc[nodeId]);
-             end = projection.invert(geoVecAdd(start, delta));
-           } else {
-             end = cache.startLoc[nodeId];
-           }
 
-           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..
+             function baseWrapperValue(value, actions) {
+               var result = value;
 
-           if (angle > 175 && angle < 185) return graph; // moving forward or backward along way?
+               if (result instanceof LazyWrapper) {
+                 result = result.value();
+               }
 
-           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?
+               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 (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 baseXor(arrays, iteratee, comparator) {
+               var length = arrays.length;
 
-         function removeDuplicateVertices(wayId, graph) {
-           var way = graph.entity(wayId);
-           var epsilon = 1e-6;
-           var prev, curr;
+               if (length < 2) {
+                 return length ? baseUniq(arrays[0]) : [];
+               }
 
-           function isInteresting(node, graph) {
-             return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
-           }
+               var index = -1,
+                   result = Array(length);
 
-           for (var i = 0; i < way.nodes.length; i++) {
-             curr = graph.entity(way.nodes[i]);
+               while (++index < length) {
+                 var array = arrays[index],
+                     othIndex = -1;
 
-             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);
+                 while (++othIndex < length) {
+                   if (othIndex != index) {
+                     result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);
+                   }
+                 }
                }
+
+               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.
+              */
 
-             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 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);
+               }
 
-         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.
+               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.
+              */
 
-           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 (!isEP1 && !isEP2) {
-             var epsilon = 1e-6,
-                 maxIter = 10;
+             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.
+              */
 
-             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;
+
+             function castFunction(value) {
+               return typeof value == 'function' ? value : identity;
              }
-           } else if (!isEP1) {
-             loc = edge1.loc;
-           } else {
-             loc = edge2.loc;
-           }
+             /**
+              * 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.
+              */
 
-           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 castPath(value, object) {
+               if (isArray(value)) {
+                 return value;
+               }
 
-           if (!isEP2 && edge2.index !== way2.nodes.indexOf(vertex.id)) {
-             way2 = way2.removeNode(vertex.id).addNode(vertex.id, edge2.index);
-             graph = graph.replace(way2);
-           }
+               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.
+              */
 
-           return graph;
-         }
 
-         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);
-           }
+             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.
+              */
 
-           return graph;
-         } // check if moving way endpoint can cross an unmoved way, if so limit delta..
+             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.
+              */
 
 
-         function limitDelta(graph) {
-           function moveNode(loc) {
-             return geoVecAdd(projection(loc), _delta);
-           }
+             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.
+              */
 
-           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..
+             function cloneBuffer(buffer, isDeep) {
+               if (isDeep) {
+                 return buffer.slice();
+               }
 
-             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);
+               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.
+              */
 
-             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 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.
+              */
 
-         var action = function action(graph) {
-           if (_delta[0] === 0 && _delta[1] === 0) return graph;
-           setupCache(graph);
 
-           if (cache.intersections.length) {
-             limitDelta(graph);
-           }
+             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.
+              */
 
-           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);
-           }
+             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.
+              */
 
-           return graph;
-         };
 
-         action.delta = function () {
-           return _delta;
-         };
+             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.
+              */
 
-         return action;
-       }
 
-       function actionMoveMember(relationId, fromIndex, toIndex) {
-         return function (graph) {
-           return graph.replace(graph.entity(relationId).moveMember(fromIndex, toIndex));
-         };
-       }
+             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`.
+              */
 
-       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)));
-         };
 
-         action.transitionable = true;
-         return action;
-       }
+             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);
 
-       function actionNoop() {
-         return function (graph) {
-           return graph;
-         };
-       }
+                 if (!othIsNull && !othIsSymbol && !valIsSymbol && value > other || valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol || valIsNull && othIsDefined && othIsReflexive || !valIsDefined && othIsReflexive || !valIsReflexive) {
+                   return 1;
+                 }
 
-       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)
+                 if (!valIsNull && !valIsSymbol && !othIsSymbol && value < other || othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol || othIsNull && valIsDefined && valIsReflexive || !othIsDefined && valIsReflexive || !othIsReflexive) {
+                   return -1;
+                 }
+               }
 
-         var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
-         var upperThreshold = Math.cos(threshold * Math.PI / 180);
+               return 0;
+             }
+             /**
+              * 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`.
+              */
 
-         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
 
-           if (way.tags.nonsquare) {
-             var tags = Object.assign({}, way.tags); // since we're squaring, remove indication that this is physically unsquare
+             function compareMultiple(object, other, orders) {
+               var index = -1,
+                   objCriteria = object.criteria,
+                   othCriteria = other.criteria,
+                   length = objCriteria.length,
+                   ordersLength = orders.length;
 
-             delete tags.nonsquare;
-             way = way.update({
-               tags: tags
-             });
-           }
+               while (++index < length) {
+                 var result = compareAscending(objCriteria[index], othCriteria[index]);
 
-           graph = graph.replace(way);
-           var isClosed = way.isClosed();
-           var nodes = graph.childNodes(way).slice(); // shallow copy
+                 if (result) {
+                   if (index >= ordersLength) {
+                     return result;
+                   }
 
-           if (isClosed) nodes.pop();
+                   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.
 
-           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
 
+               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.
+              */
 
-           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 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;
 
-           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;
+               while (++leftIndex < leftLength) {
+                 result[leftIndex] = partials[leftIndex];
+               }
 
-               if (score < epsilon) {
-                 break;
+               while (++argsIndex < holdersLength) {
+                 if (isUncurried || argsIndex < argsLength) {
+                   result[holders[argsIndex]] = args[argsIndex];
+                 }
                }
+
+               while (rangeLength--) {
+                 result[leftIndex++] = args[argsIndex++];
+               }
+
+               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.
+              */
 
-             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 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;
 
-               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));
+               while (++argsIndex < rangeLength) {
+                 result[argsIndex] = args[argsIndex];
                }
 
-               if (dotp > upperThreshold) {
-                 straights.push(point);
-               } else {
-                 simplified.push(point);
+               var offset = argsIndex;
+
+               while (++rightIndex < rightLength) {
+                 result[offset + rightIndex] = partials[rightIndex];
                }
-             } // Orthogonalize the simplified shape
 
+               while (++holdersIndex < holdersLength) {
+                 if (isUncurried || argsIndex < argsLength) {
+                   result[offset + holders[holdersIndex]] = args[argsIndex++];
+                 }
+               }
 
-             var bestPoints = clonePoints(simplified);
-             var originalPoints = clonePoints(simplified);
-             score = Infinity;
+               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`.
+              */
 
-             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]);
+             function copyArray(source, array) {
+               var index = -1,
+                   length = source.length;
+               array || (array = Array(length));
+
+               while (++index < length) {
+                 array[index] = source[index];
                }
 
-               var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);
+               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 (newScore < score) {
-                 bestPoints = clonePoints(simplified);
-                 score = newScore;
-               }
 
-               if (score < epsilon) {
-                 break;
+             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;
+
+                 if (newValue === undefined$1) {
+                   newValue = source[key];
+                 }
+
+                 if (isNew) {
+                   baseAssignValue(object, key, newValue);
+                 } else {
+                   assignValue(object, key, newValue);
+                 }
                }
+
+               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`.
+              */
 
-             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 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`.
+              */
 
-               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 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.
+              */
 
-             for (i = 0; i < straights.length; i++) {
-               point = straights[i];
-               if (nodeCount[point.id] > 1) continue; // skip self-intersections
 
-               node = graph.entity(point.id);
+             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.
+              */
 
-               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)));
+             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;
                  }
-               }
+
+                 object = Object(object);
+
+                 while (++index < length) {
+                   var source = sources[index];
+
+                   if (source) {
+                     assigner(object, source, index, customizer);
+                   }
+                 }
+
+                 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.
+              */
 
-           return graph;
 
-           function clonePoints(array) {
-             return array.map(function (p) {
-               return {
-                 id: p.id,
-                 coord: [p.coord[0], p.coord[1]]
+             function createBaseEach(eachFunc, fromRight) {
+               return function (collection, iteratee) {
+                 if (collection == null) {
+                   return collection;
+                 }
+
+                 if (!isArrayLike(collection)) {
+                   return eachFunc(collection, iteratee);
+                 }
+
+                 var length = collection.length,
+                     index = fromRight ? length : -1,
+                     iterable = Object(collection);
+
+                 while (fromRight ? index-- : ++index < length) {
+                   if (iteratee(iterable[index], index, iterable) === false) {
+                     break;
+                   }
+                 }
+
+                 return collection;
                };
-             });
-           }
+             }
+             /**
+              * 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.
+              */
 
-           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 createBaseFor(fromRight) {
+               return function (object, iteratee, keysFunc) {
+                 var index = -1,
+                     iterable = Object(object),
+                     props = keysFunc(object),
+                     length = props.length;
 
-             if (val < lowerThreshold) {
-               // nearly orthogonal
-               corner.i = i;
-               corner.dotp = val;
-               var vec = geoVecNormalize(geoVecAdd(p, q));
-               return geoVecScale(vec, 0.1 * dotp * scale);
+                 while (length--) {
+                   var key = props[fromRight ? length : ++index];
+
+                   if (iteratee(iterable[key], key, iterable) === false) {
+                     break;
+                   }
+                 }
+
+                 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 [0, 0]; // do nothing
-           }
-         }; // if we are only orthogonalizing one vertex,
-         // get that vertex and the previous and next
 
+             function createBind(func, bitmask, thisArg) {
+               var isBind = bitmask & WRAP_BIND_FLAG,
+                   Ctor = createCtor(func);
 
-         function nodeSubset(nodes, vertexID, isClosed) {
-           var first = isClosed ? 0 : 1;
-           var last = isClosed ? nodes.length : nodes.length - 1;
+               function wrapper() {
+                 var fn = this && this !== root && this instanceof wrapper ? Ctor : func;
+                 return fn.apply(isBind ? thisArg : this, arguments);
+               }
 
-           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]];
+               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.
+              */
 
-           return [];
-         }
 
-         action.disabled = function (graph) {
-           var way = graph.entity(wayID);
-           way = way.removeNode(''); // sanity check - remove any consecutive duplicates
+             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.
+              */
 
-           graph = graph.replace(way);
-           var isClosed = way.isClosed();
-           var nodes = graph.childNodes(way).slice(); // shallow copy
 
-           if (isClosed) nodes.pop();
-           var allowStraightAngles = false;
+             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.
+              */
 
-           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);
+             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;
 
-           if (score === null) {
-             return 'not_squarish';
-           } else if (score === 0) {
-             return 'square_enough';
-           } else {
-             return false;
-           }
-         };
+                 switch (args.length) {
+                   case 0:
+                     return new Ctor();
 
-         action.transitionable = true;
-         return action;
-       }
+                   case 1:
+                     return new Ctor(args[0]);
 
-       //
-       // `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.
-       //
+                   case 2:
+                     return new Ctor(args[0], args[1]);
 
-       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'
-           });
+                   case 3:
+                     return new Ctor(args[0], args[1], args[2]);
 
-           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'
-               });
-             });
-           }
+                   case 4:
+                     return new Ctor(args[0], args[1], args[2], args[3]);
 
-           members.push({
-             id: toWay.id,
-             type: 'way',
-             role: 'to'
-           });
-           return graph.replace(osmRelation({
-             id: restrictionID,
-             tags: {
-               type: 'restriction',
-               restriction: restrictionType
-             },
-             members: members
-           }));
-         };
-       }
+                   case 5:
+                     return new Ctor(args[0], args[1], args[2], args[3], args[4]);
 
-       function actionRevert(id) {
-         var action = function action(graph) {
-           var entity = graph.hasEntity(id),
-               base = graph.base().entities[id];
+                   case 6:
+                     return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
 
-           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);
+                   case 7:
+                     return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
+                 }
+
+                 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.
+
+                 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.
+              */
 
-                 if (parent.isDegenerate()) {
-                   graph = actionDeleteWay(parent.id)(graph);
+
+             function createCurry(func, bitmask, arity) {
+               var Ctor = createCtor(func);
+
+               function wrapper() {
+                 var length = arguments.length,
+                     args = Array(length),
+                     index = length,
+                     placeholder = getHolder(wrapper);
+
+                 while (index--) {
+                   args[index] = arguments[index];
                  }
-               });
-             }
 
-             graph.parentRelations(entity).forEach(function (parent) {
-               parent = parent.removeMembersWithID(id);
-               graph = graph.replace(parent);
+                 var holders = length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder ? [] : replaceHolders(args, placeholder);
+                 length -= holders.length;
 
-               if (parent.isDegenerate()) {
-                 graph = actionDeleteRelation(parent.id)(graph);
+                 if (length < arity) {
+                   return createRecurry(func, bitmask, createHybrid, wrapper.placeholder, undefined$1, args, holders, undefined$1, undefined$1, arity - length);
+                 }
+
+                 var fn = this && this !== root && this instanceof wrapper ? Ctor : func;
+                 return apply(fn, this, args);
                }
-             });
-           }
 
-           return graph.revert(id);
-         };
+               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.
+              */
 
-         return action;
-       }
 
-       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)));
-             });
-           });
-         };
+             function createFind(findIndexFunc) {
+               return function (collection, predicate, fromIndex) {
+                 var iterable = Object(collection);
 
-         return action;
-       }
+                 if (!isArrayLike(collection)) {
+                   var iteratee = getIteratee(predicate, 3);
+                   collection = keys(collection);
 
-       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)));
-             });
-           });
-         };
-       }
+                   predicate = function predicate(key) {
+                     return iteratee(iterable[key], key, iterable);
+                   };
+                 }
 
-       /* Align nodes along their common axis */
+                 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.
+              */
 
-       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 createFlow(fromRight) {
+               return flatRest(function (funcs) {
+                 var length = funcs.length,
+                     index = length,
+                     prereq = LodashWrapper.prototype.thru;
 
-         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
+                 if (fromRight) {
+                   funcs.reverse();
+                 }
 
-           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);
+                 while (index--) {
+                   var func = funcs[index];
 
-           if (isLong) {
-             return [p1, q1];
-           }
+                   if (typeof func != 'function') {
+                     throw new TypeError(FUNC_ERROR_TEXT);
+                   }
 
-           return [p2, q2];
-         }
+                   if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
+                     var wrapper = new LodashWrapper([], true);
+                   }
+                 }
 
-         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
+                 index = wrapper ? index : length;
 
-           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)));
-           }
+                 while (++index < length) {
+                   func = funcs[index];
+                   var funcName = getFuncName(func),
+                       data = funcName == 'wrapper' ? getData(func) : undefined$1;
 
-           return graph;
-         };
+                   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);
+                   }
+                 }
 
-         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;
+                 return function () {
+                   var args = arguments,
+                       value = args[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);
+                   if (wrapper && args.length == 1 && isArray(value)) {
+                     return wrapper.plant(value).value();
+                   }
 
-             if (!isNaN(dist) && dist > maxDistance) {
-               maxDistance = dist;
+                   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.
+              */
 
-           if (maxDistance < 0.0001) {
-             return 'straight_enough';
-           }
-         };
 
-         action.transitionable = true;
-         return action;
-       }
+             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);
 
-       /*
-        * Based on https://github.com/openstreetmap/potlatch2/net/systemeD/potlatch2/tools/Straighten.as
-        */
+               function wrapper() {
+                 var length = arguments.length,
+                     args = Array(length),
+                     index = length;
 
-       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
+                 while (index--) {
+                   args[index] = arguments[index];
+                 }
 
+                 if (isCurried) {
+                   var placeholder = getHolder(wrapper),
+                       holdersCount = countHolders(args, placeholder);
+                 }
 
-         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';
-           });
+                 if (partials) {
+                   args = composeArgs(args, partials, holders, isCurried);
+                 }
 
-           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 (partialsRight) {
+                   args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
+                 }
 
+                 length -= holdersCount;
 
-           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 (isCurried && length < arity) {
+                   var newHolders = replaceHolders(args, placeholder);
+                   return createRecurry(func, bitmask, createHybrid, wrapper.placeholder, thisArg, args, newHolders, argPos, ary, arity - length);
+                 }
 
-           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
+                 var thisBinding = isBind ? thisArg : this,
+                     fn = isBindKey ? thisBinding[func] : func;
+                 length = args.length;
 
-           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 (argPos) {
+                   args = reorder(args, argPos);
+                 } else if (isFlip && length > 1) {
+                   args.reverse();
+                 }
 
+                 if (isAry && ary < length) {
+                   args.length = ary;
+                 }
 
-           while (remainingWays.length) {
-             nextWay = getNextWay(currNode, remainingWays);
-             remainingWays = utilArrayDifference(remainingWays, [nextWay]);
+                 if (this && this !== root && this instanceof wrapper) {
+                   fn = Ctor || createCtor(fn);
+                 }
 
-             if (nextWay[0] !== currNode) {
-               nextWay.reverse();
+                 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.
+              */
 
-             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 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.
+              */
 
-           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 nodes.map(function (n) {
-             return graph.entity(n);
-           });
-         }
+             function createMathOperation(operator, defaultValue) {
+               return function (value, other) {
+                 var result;
 
-         function shouldKeepNode(node, graph) {
-           return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
-         }
+                 if (value === undefined$1 && other === undefined$1) {
+                   return defaultValue;
+                 }
 
-         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;
+                 if (value !== undefined$1) {
+                   result = value;
+                 }
 
-           for (i = 1; i < points.length - 1; i++) {
-             var node = nodes[i];
-             var point = points[i];
+                 if (other !== undefined$1) {
+                   if (result === undefined$1) {
+                     return other;
+                   }
 
-             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 (typeof value == 'string' || typeof other == 'string') {
+                     value = baseToString(value);
+                     other = baseToString(other);
+                   } else {
+                     value = baseToNumber(value);
+                     other = baseToNumber(other);
+                   }
+
+                   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.
+              */
+
+
+             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`.
+              */
+
+
+             function createPadding(length, chars) {
+               chars = chars === undefined$1 ? ' ' : baseToString(chars);
+               var charsLength = chars.length;
+
+               if (charsLength < 2) {
+                 return charsLength ? baseRepeat(chars, length) : chars;
                }
+
+               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.
+              */
 
-           for (i = 0; i < toDelete.length; i++) {
-             graph = actionDeleteNode(toDelete[i].id)(graph);
-           }
 
-           return graph;
-         };
+             function createPartial(func, bitmask, thisArg, partials) {
+               var isBind = bitmask & WRAP_BIND_FLAG,
+                   Ctor = createCtor(func);
 
-         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;
+               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;
 
-           if (threshold === 0) {
-             return 'too_bendy';
-           }
+                 while (++leftIndex < leftLength) {
+                   args[leftIndex] = partials[leftIndex];
+                 }
 
-           var maxDistance = 0;
+                 while (argsLength--) {
+                   args[leftIndex++] = arguments[++argsIndex];
+                 }
 
-           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
+                 return apply(fn, isBind ? thisArg : this, args);
+               }
 
-             if (isNaN(dist) || dist > threshold) {
-               return 'too_bendy';
-             } else if (dist > maxDistance) {
-               maxDistance = dist;
+               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.
+              */
 
-           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 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.
 
-         action.transitionable = true;
-         return action;
-       }
 
-       //
-       // `turn` must be an `osmTurn` object with a `restrictionID` property.
-       // see osm/intersection.js, pathToTurn()
-       //
+                 start = toFinite(start);
 
-       function actionUnrestrictTurn(turn) {
-         return function (graph) {
-           return actionDeleteRelation(turn.restrictionID)(graph);
-         };
-       }
+                 if (end === undefined$1) {
+                   end = start;
+                   start = 0;
+                 } else {
+                   end = toFinite(end);
+                 }
 
-       /* Reflect the given area around its axis of symmetry */
+                 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 actionReflect(reflectIds, projection) {
-         var _useLongAxis = true;
 
-         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.
+             function createRelationalOperation(operator) {
+               return function (value, other) {
+                 if (!(typeof value == 'string' && typeof other == 'string')) {
+                   value = toNumber(value);
+                   other = toNumber(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);
+                 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.
+              */
 
-           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
 
+             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);
 
-           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 (!(bitmask & WRAP_CURRY_BOUND_FLAG)) {
+                 bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG);
+               }
 
-           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 newData = [func, bitmask, thisArg, newPartials, newHolders, newPartialsRight, newHoldersRight, argPos, ary, arity];
+               var result = wrapFunc.apply(undefined$1, newData);
 
-           return graph;
-         };
+               if (isLaziable(func)) {
+                 setData(result, newData);
+               }
 
-         action.useLongAxis = function (val) {
-           if (!arguments.length) return _useLongAxis;
-           _useLongAxis = val;
-           return action;
-         };
+               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.
+              */
 
-         action.transitionable = true;
-         return action;
-       }
 
-       function actionUpgradeTags(entityId, oldTags, replaceTags) {
-         return function (graph) {
-           var entity = graph.entity(entityId);
-           var tags = Object.assign({}, entity.tags); // shallow copy
+             function createRound(methodName) {
+               var func = Math[methodName];
+               return function (number, precision) {
+                 number = toNumber(number);
+                 precision = precision == null ? 0 : nativeMin(toInteger(precision), 292);
 
-           var transferValue;
-           var semiIndex;
+                 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));
+                 }
 
-           for (var oldTagKey in oldTags) {
-             if (!(oldTagKey in tags)) continue; // wildcard match
+                 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.
+              */
 
-             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;
+             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 (tag == mapTag) {
+                   return mapToArray(object);
                  }
 
-                 vals.splice(oldIndex, 1);
-                 tags[oldTagKey] = vals.join(';');
-               }
+                 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 (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;
+             function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
+               var isBindKey = bitmask & WRAP_BIND_KEY_FLAG;
+
+               if (!isBindKey && typeof func != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
+
+               var length = partials ? partials.length : 0;
+
+               if (!length) {
+                 bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG);
+                 partials = holders = undefined$1;
+               }
+
+               ary = ary === undefined$1 ? ary : nativeMax(toInteger(ary), 0);
+               arity = arity === undefined$1 ? arity : toInteger(arity);
+               length -= holders ? holders.length : 0;
+
+               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];
+
+               if (data) {
+                 mergeData(newData, data);
+               }
+
+               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);
+
+               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 {
-                 if (tags[replaceKey] && oldTags[replaceKey] && semiIndex !== undefined) {
-                   // don't override preexisting values
-                   var existingVals = tags[replaceKey].split(';').filter(Boolean);
+                 result = createHybrid.apply(undefined$1, newData);
+               }
 
-                   if (existingVals.indexOf(replaceValue) === -1) {
-                     existingVals.splice(semiIndex, 0, replaceValue);
-                     tags[replaceKey] = existingVals.join(';');
-                   }
-                 } else {
-                   tags[replaceKey] = replaceValue;
-                 }
+               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.
+              */
+
+
+             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.
+              */
+
+
+             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);
+               }
+
+               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`.
+              */
+
+
+             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`.
+              */
 
-           return graph.replace(entity.update({
-             tags: tags
-           }));
-         };
-       }
 
-       function behaviorEdit(context) {
-         function behavior() {
-           context.map().minzoom(context.minEditableZoom());
-         }
+             function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
+               var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
+                   arrLength = array.length,
+                   othLength = other.length;
 
-         behavior.off = function () {
-           context.map().minzoom(0);
-         };
+               if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+                 return false;
+               } // Check that cyclic values are equal.
 
-         return behavior;
-       }
 
-       /*
-          The hover behavior adds the `.hover` class on pointerover to all elements to which
-          the identical datum is bound, and removes it on pointerout.
+               var arrStacked = stack.get(array);
+               var othStacked = stack.get(other);
 
-          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 (arrStacked && othStacked) {
+                 return arrStacked == other && othStacked == array;
+               }
 
-       function behaviorHover(context) {
-         var dispatch$1 = dispatch('hover');
+               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.
 
-         var _selection = select(null);
+               while (++index < arrLength) {
+                 var arrValue = array[index],
+                     othValue = other[index];
 
-         var _newNodeId = null;
-         var _initialNodeID = null;
+                 if (customizer) {
+                   var compared = isPartial ? customizer(othValue, arrValue, index, other, array, stack) : customizer(arrValue, othValue, index, array, other, stack);
+                 }
 
-         var _altDisables;
+                 if (compared !== undefined$1) {
+                   if (compared) {
+                     continue;
+                   }
 
-         var _ignoreVertex;
+                   result = false;
+                   break;
+                 } // Recursively compare arrays (susceptible to call stack limits).
 
-         var _targets = []; // use pointer events on supported platforms; fallback to mouse events
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+                 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;
+                 }
+               }
 
-         function keydown(d3_event) {
-           if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-             _selection.selectAll('.hover').classed('hover-suppressed', true).classed('hover', false);
+               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`.
+              */
 
-             _selection.classed('hover-disabled', true);
 
-             dispatch$1.call('hover', this, null);
-           }
-         }
+             function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
+               switch (tag) {
+                 case dataViewTag:
+                   if (object.byteLength != other.byteLength || object.byteOffset != other.byteOffset) {
+                     return false;
+                   }
 
-         function keyup(d3_event) {
-           if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-             _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false).classed('hover', true);
+                   object = object.buffer;
+                   other = other.buffer;
 
-             _selection.classed('hover-disabled', false);
+                 case arrayBufferTag:
+                   if (object.byteLength != other.byteLength || !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+                     return false;
+                   }
 
-             dispatch$1.call('hover', this, _targets);
-           }
-         }
+                   return true;
 
-         function behavior(selection) {
-           _selection = selection;
-           _targets = [];
+                 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);
 
-           if (_initialNodeID) {
-             _newNodeId = _initialNodeID;
-             _initialNodeID = null;
-           } else {
-             _newNodeId = null;
-           }
+                 case errorTag:
+                   return object.name == other.name && object.message == other.message;
 
-           _selection.on(_pointerPrefix + 'over.hover', pointerover).on(_pointerPrefix + 'out.hover', pointerout) // treat pointerdown as pointerover for touch devices
-           .on(_pointerPrefix + 'down.hover', pointerover);
+                 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 + '';
 
-           select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true).on('keydown.hover', keydown).on('keyup.hover', keyup);
+                 case mapTag:
+                   var convert = mapToArray;
 
-           function eventTarget(d3_event) {
-             var datum = d3_event.target && d3_event.target.__data__;
-             if (_typeof(datum) !== 'object') return null;
+                 case setTag:
+                   var isPartial = bitmask & COMPARE_PARTIAL_FLAG;
+                   convert || (convert = setToArray);
 
-             if (!(datum instanceof osmEntity) && datum.properties && datum.properties.entity instanceof osmEntity) {
-               return datum.properties.entity;
-             }
+                   if (object.size != other.size && !isPartial) {
+                     return false;
+                   } // Assume cyclic values are equal.
 
-             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);
+                   var stacked = stack.get(object);
 
-             if (target && _targets.indexOf(target) === -1) {
-               _targets.push(target);
+                   if (stacked) {
+                     return stacked == other;
+                   }
 
-               updateHover(d3_event, _targets);
-             }
-           }
+                   bitmask |= COMPARE_UNORDERED_FLAG; // Recursively compare objects (susceptible to call stack limits).
 
-           function pointerout(d3_event) {
-             var target = eventTarget(d3_event);
+                   stack.set(object, other);
+                   var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);
+                   stack['delete'](object);
+                   return result;
 
-             var index = _targets.indexOf(target);
+                 case symbolTag:
+                   if (symbolValueOf) {
+                     return symbolValueOf.call(object) == symbolValueOf.call(other);
+                   }
 
-             if (index !== -1) {
-               _targets.splice(index);
+               }
 
-               updateHover(d3_event, _targets);
+               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`.
+              */
 
-           function allowsVertex(d) {
-             return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
-           }
 
-           function modeAllowsHover(target) {
-             var mode = context.mode();
+             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;
 
-             if (mode.id === 'add-point') {
-               return mode.preset.matchGeometry('vertex') || target.type !== 'way' && target.geometry(context.graph()) !== 'vertex';
-             }
+               if (objLength != othLength && !isPartial) {
+                 return false;
+               }
 
-             return true;
-           }
+               var index = objLength;
 
-           function updateHover(d3_event, targets) {
-             _selection.selectAll('.hover').classed('hover', false);
+               while (index--) {
+                 var key = objProps[index];
 
-             _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
+                 if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
+                   return false;
+                 }
+               } // Check that cyclic values are equal.
 
-             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;
-             }
+               var objStacked = stack.get(object);
+               var othStacked = stack.get(other);
 
-             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 (objStacked && othStacked) {
+                 return objStacked == other && othStacked == object;
                }
 
-               return true;
-             });
-             var selector = '';
+               var result = true;
+               stack.set(object, other);
+               stack.set(other, object);
+               var skipCtor = isPartial;
 
-             for (var i in targets) {
-               var datum = targets[i]; // What are we hovering over?
+               while (++index < objLength) {
+                 key = objProps[index];
+                 var objValue = object[key],
+                     othValue = other[key];
 
-               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 (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).
 
-                 if (datum.type === 'relation') {
-                   for (var j in datum.members) {
-                     selector += ', .' + datum.members[j].id;
-                   }
+
+                 if (!(compared === undefined$1 ? objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack) : compared)) {
+                   result = false;
+                   break;
                  }
+
+                 skipCtor || (skipCtor = key == 'constructor');
                }
-             }
 
-             var suppressed = _altDisables && d3_event && d3_event.altKey;
+               if (result && !skipCtor) {
+                 var objCtor = object.constructor,
+                     othCtor = other.constructor; // Non `Object` object instances with different constructors are not equal.
 
-             if (selector.trim().length) {
-               // remove the first comma
-               selector = selector.slice(1);
+                 if (objCtor != othCtor && 'constructor' in object && 'constructor' in other && !(typeof objCtor == 'function' && objCtor instanceof objCtor && typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+                   result = false;
+                 }
+               }
 
-               _selection.selectAll(selector).classed(suppressed ? 'hover-suppressed' : 'hover', true);
+               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.
+              */
 
-             dispatch$1.call('hover', this, !suppressed && targets);
-           }
-         }
-
-         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);
-         };
 
-         behavior.altDisables = function (val) {
-           if (!arguments.length) return _altDisables;
-           _altDisables = val;
-           return behavior;
-         };
+             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.
+              */
 
-         behavior.ignoreVertex = function (val) {
-           if (!arguments.length) return _ignoreVertex;
-           _ignoreVertex = val;
-           return behavior;
-         };
 
-         behavior.initialNodeID = function (nodeId) {
-           _initialNodeID = nodeId;
-           return behavior;
-         };
+             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.
+              */
 
-         return utilRebind(behavior, dispatch$1, 'on');
-       }
 
-       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');
+             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`.
+              */
 
-         var _hover = behaviorHover(context).altDisables(true).ignoreVertex(true).on('hover', context.ui().sidebar.hover);
 
-         var _edit = behaviorEdit(context);
+             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.
+              */
 
-         var _closeTolerance = 4;
-         var _tolerance = 12;
-         var _mouseLeave = false;
-         var _lastMouse = null;
+             function getFuncName(func) {
+               var result = func.name + '',
+                   array = realNames[result],
+                   length = hasOwnProperty.call(realNames, result) ? array.length : 0;
 
-         var _lastPointerUpEvent;
+               while (length--) {
+                 var data = array[length],
+                     otherFunc = data.func;
 
-         var _downPointer; // use pointer events on supported platforms; fallback to mouse events
+                 if (otherFunc == null || otherFunc == func) {
+                   return data.name;
+                 }
+               }
 
+               return result;
+             }
+             /**
+              * Gets the argument placeholder value for `func`.
+              *
+              * @private
+              * @param {Function} func The function to inspect.
+              * @returns {*} Returns the placeholder value.
+              */
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // related code
-         // - `mode/drag_node.js` `datum()`
 
+             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.
+              */
 
-         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 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.
+              */
 
 
-           var d = element.__data__;
-           return d && d.properties && d.properties.target ? d : {};
-         }
+             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 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 getMatchData(object) {
+               var result = keys(object),
+                   length = result.length;
 
-           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);
-           }
-         }
+               while (length--) {
+                 var key = result[length],
+                     value = object[key];
+                 result[length] = [key, value, isStrictComparable(value)];
+               }
 
-         function pointermove(d3_event) {
-           if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse') && !_downPointer.isCancelled) {
-             var p2 = _downPointer.pointerLocGetter(d3_event);
+               return result;
+             }
+             /**
+              * 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`.
+              */
 
-             var dist = geoVecLength(_downPointer.downLoc, p2);
 
-             if (dist >= _closeTolerance) {
-               _downPointer.isCancelled = true;
-               dispatch$1.call('downcancel', this);
+             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`.
+              */
 
-           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$1.call('move', this, d3_event, datum(d3_event));
-         }
+             function getRawTag(value) {
+               var isOwn = hasOwnProperty.call(value, symToStringTag),
+                   tag = value[symToStringTag];
 
-         function pointercancel(d3_event) {
-           if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse')) {
-             if (!_downPointer.isCancelled) {
-               dispatch$1.call('downcancel', this);
-             }
+               try {
+                 value[symToStringTag] = undefined$1;
+                 var unmasked = true;
+               } catch (e) {}
 
-             _downPointer = null;
-           }
-         }
+               var result = nativeObjectToString.call(value);
 
-         function mouseenter() {
-           _mouseLeave = false;
-         }
+               if (unmasked) {
+                 if (isOwn) {
+                   value[symToStringTag] = tag;
+                 } else {
+                   delete value[symToStringTag];
+                 }
+               }
 
-         function mouseleave() {
-           _mouseLeave = true;
-         }
+               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.
+              */
 
-         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()`
 
+             var getSymbols = !nativeGetSymbols ? stubArray : function (object) {
+               if (object == null) {
+                 return [];
+               }
 
-         function click(d3_event, loc) {
-           var d = datum(d3_event);
-           var target = d && d.properties && d.properties.entity;
-           var mode = context.mode();
+               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.
+              */
 
-           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());
+             var getSymbolsIn = !nativeGetSymbols ? stubArray : function (object) {
+               var result = [];
 
-             if (choice) {
-               var edge = [target.nodes[choice.index - 1], target.nodes[choice.index]];
-               dispatch$1.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$1.call('click', this, locLatLng, d);
-           }
-         } // treat a spacebar press like a click
+               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`.
+              */
 
-         function space(d3_event) {
-           d3_event.preventDefault();
-           d3_event.stopPropagation();
-           var currSpace = context.map().mouse();
+             var getTag = baseGetTag; // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
 
-           if (_disableSpace && _lastSpace) {
-             var dist = geoVecLength(_lastSpace, currSpace);
+             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 (dist > _tolerance) {
-               _disableSpace = false;
-             }
-           }
+                 if (ctorString) {
+                   switch (ctorString) {
+                     case dataViewCtorString:
+                       return dataViewTag;
 
-           if (_disableSpace || _mouseLeave || !_lastMouse) return; // user must move mouse or release space bar to allow another click
+                     case mapCtorString:
+                       return mapTag;
 
-           _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
+                     case promiseCtorString:
+                       return promiseTag;
 
-           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);
-         }
+                     case setCtorString:
+                       return setTag;
 
-         function backspace(d3_event) {
-           d3_event.preventDefault();
-           dispatch$1.call('undo');
-         }
+                     case weakMapCtorString:
+                       return weakMapTag;
+                   }
+                 }
 
-         function del(d3_event) {
-           d3_event.preventDefault();
-           dispatch$1.call('cancel');
-         }
+                 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.
+              */
 
-         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 getView(start, end, transforms) {
+               var index = -1,
+                   length = transforms.length;
 
-         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
+               while (++index < length) {
+                 var data = transforms[index],
+                     size = data.size;
 
-           select(document).call(keybinding.unbind);
-         };
+                 switch (data.type) {
+                   case 'drop':
+                     start += size;
+                     break;
 
-         behavior.hover = function () {
-           return _hover;
-         };
+                   case 'dropRight':
+                     end -= size;
+                     break;
 
-         return utilRebind(behavior, dispatch$1, 'on');
-       }
+                   case 'take':
+                     end = nativeMin(end, start + size);
+                     break;
 
-       function initRange(domain, range) {
-         switch (arguments.length) {
-           case 0:
-             break;
+                   case 'takeRight':
+                     start = nativeMax(start, end - size);
+                     break;
+                 }
+               }
 
-           case 1:
-             this.range(domain);
-             break;
+               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.
+              */
 
-           default:
-             this.range(range).domain(domain);
-             break;
-         }
 
-         return this;
-       }
+             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`.
+              */
 
-       function constants(x) {
-         return function () {
-           return x;
-         };
-       }
 
-       function number$1(x) {
-         return +x;
-       }
+             function hasPath(object, path, hasFunc) {
+               path = castPath(path, object);
+               var index = -1,
+                   length = path.length,
+                   result = false;
 
-       var unit = [0, 1];
-       function identity$3(x) {
-         return x;
-       }
+               while (++index < length) {
+                 var key = toKey(path[index]);
 
-       function normalize$1(a, b) {
-         return (b -= a = +a) ? function (x) {
-           return (x - a) / b;
-         } : constants(isNaN(b) ? NaN : 0.5);
-       }
+                 if (!(result = object != null && hasFunc(object, key))) {
+                   break;
+                 }
 
-       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].
+                 object = object[key];
+               }
 
+               if (result || ++index != length) {
+                 return result;
+               }
 
-       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));
-         };
-       }
+               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 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.
 
-         if (domain[j] < domain[0]) {
-           domain = domain.slice().reverse();
-           range = range.slice().reverse();
-         }
+             function initCloneArray(array) {
+               var length = array.length,
+                   result = new array.constructor(length); // Add properties assigned by `RegExp#exec`.
 
-         while (++i < j) {
-           d[i] = normalize$1(domain[i], domain[i + 1]);
-           r[i] = interpolate(range[i], range[i + 1]);
-         }
+               if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
+                 result.index = array.index;
+                 result.input = array.input;
+               }
 
-         return function (x) {
-           var i = bisectRight(domain, x, 1, j) - 1;
-           return r[i](d[i](x));
-         };
-       }
+               return result;
+             }
+             /**
+              * Initializes an object clone.
+              *
+              * @private
+              * @param {Object} object The object to clone.
+              * @returns {Object} Returns the initialized clone.
+              */
 
-       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 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;
-         }
+             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.
+              */
 
-         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 initCloneByTag(object, tag, isDeep) {
+               var Ctor = object.constructor;
 
-         scale.domain = function (_) {
-           return arguments.length ? (domain = Array.from(_, number$1), rescale()) : domain.slice();
-         };
+               switch (tag) {
+                 case arrayBufferTag:
+                   return cloneArrayBuffer(object);
 
-         scale.range = function (_) {
-           return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
-         };
+                 case boolTag:
+                 case dateTag:
+                   return new Ctor(+object);
 
-         scale.rangeRound = function (_) {
-           return range = Array.from(_), interpolate$1 = interpolateRound, rescale();
-         };
+                 case dataViewTag:
+                   return cloneDataView(object, isDeep);
 
-         scale.clamp = function (_) {
-           return arguments.length ? (clamp = _ ? true : identity$3, rescale()) : clamp !== identity$3;
-         };
+                 case float32Tag:
+                 case float64Tag:
+                 case int8Tag:
+                 case int16Tag:
+                 case int32Tag:
+                 case uint8Tag:
+                 case uint8ClampedTag:
+                 case uint16Tag:
+                 case uint32Tag:
+                   return cloneTypedArray(object, isDeep);
 
-         scale.interpolate = function (_) {
-           return arguments.length ? (interpolate$1 = _, rescale()) : interpolate$1;
-         };
+                 case mapTag:
+                   return new Ctor();
 
-         scale.unknown = function (_) {
-           return arguments.length ? (unknown = _, scale) : unknown;
-         };
+                 case numberTag:
+                 case stringTag:
+                   return new Ctor(object);
 
-         return function (t, u) {
-           transform = t, untransform = u;
-           return rescale();
-         };
-       }
-       function continuous() {
-         return transformer$1()(identity$3, identity$3);
-       }
+                 case regexpTag:
+                   return cloneRegExp(object);
 
-       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].
+                 case setTag:
+                   return new Ctor();
 
-       function formatDecimalParts(x, p) {
-         if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
+                 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.
+              */
 
-         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).
 
-         return [coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient, +x.slice(i + 1)];
-       }
+             function insertWrapDetails(source, details) {
+               var length = details.length;
 
-       function exponent (x) {
-         return x = formatDecimalParts(Math.abs(x)), x ? x[1] : NaN;
-       }
+               if (!length) {
+                 return source;
+               }
 
-       function formatGroup (grouping, thousands) {
-         return function (value, width) {
-           var i = value.length,
-               t = [],
-               j = 0,
-               g = grouping[0],
-               length = 0;
+               var lastIndex = length - 1;
+               details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
+               details = details.join(length > 2 ? ', ' : ' ');
+               return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');
+             }
+             /**
+              * 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`.
+              */
 
-           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);
-         };
-       }
+             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`.
+              */
 
-       function formatNumerals (numerals) {
-         return function (value) {
-           return value.replace(/[0-9]/g, function (i) {
-             return numerals[+i];
-           });
-         };
-       }
 
-       // [[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 isIndex(value, length) {
+               var type = _typeof(value);
 
-       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 + "";
-       }
+               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`.
+              */
 
-       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;
+             function isIterateeCall(value, index, object) {
+               if (!isObject(object)) {
+                 return false;
+               }
 
-             case "0":
-               if (i0 === 0) i0 = i;
-               i1 = i;
-               break;
+               var type = _typeof(index);
 
-             default:
-               if (!+s[i]) break out;
-               if (i0 > 0) i0 = 0;
-               break;
-           }
-         }
+               if (type == 'number' ? isArrayLike(object) && isIndex(index, object.length) : type == 'string' && index in object) {
+                 return eq(object[index], value);
+               }
 
-         return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
-       }
+               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`.
+              */
 
-       // `thisNumberValue` abstract operation
-       // https://tc39.es/ecma262/#sec-thisnumbervalue
-       var thisNumberValue = function (value) {
-         if (typeof value != 'number' && classofRaw(value) != 'Number') {
-           throw TypeError('Incorrect invocation');
-         }
-         return +value;
-       };
 
-       // `String.prototype.repeat` method implementation
-       // https://tc39.es/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;
-       };
+             function isKey(value, object) {
+               if (isArray(value)) {
+                 return false;
+               }
 
-       var nativeToFixed = 1.0.toFixed;
-       var floor$6 = Math.floor;
+               var type = _typeof(value);
 
-       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);
-       };
+               if (type == 'number' || type == 'symbol' || type == 'boolean' || value == null || isSymbol(value)) {
+                 return true;
+               }
 
-       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;
-       };
+               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`.
+              */
 
-       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$6(c2 / 1e7);
-         }
-       };
 
-       var divide = function (data, n) {
-         var index = 6;
-         var c = 0;
-         while (--index >= 0) {
-           c += data[index];
-           data[index] = floor$6(c / n);
-           c = (c % n) * 1e7;
-         }
-       };
+             function isKeyable(value) {
+               var type = _typeof(value);
 
-       var dataToString = function (data) {
-         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;
-       };
+               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`.
+              */
 
-       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({});
-       });
 
-       // `Number.prototype.toFixed` method
-       // https://tc39.es/ecma262/#sec-number.prototype.tofixed
-       _export({ target: 'Number', proto: true, forced: FORCED$c }, {
-         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;
+             function isLaziable(func) {
+               var funcName = getFuncName(func),
+                   other = lodash[funcName];
 
-           if (fractDigits < 0 || fractDigits > 20) throw RangeError('Incorrect fraction digits');
-           // eslint-disable-next-line no-self-compare -- NaN check
-           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(data, 0, z);
-               j = fractDigits;
-               while (j >= 7) {
-                 multiply(data, 1e7, 0);
-                 j -= 7;
+               if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
+                 return false;
                }
-               multiply(data, pow$2(10, j, 1), 0);
-               j = e - 1;
-               while (j >= 23) {
-                 divide(data, 1 << 23);
-                 j -= 23;
+
+               if (func === other) {
+                 return true;
                }
-               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) + stringRepeat.call('0', fractDigits);
+
+               var data = getData(other);
+               return !!data && func === data[0];
              }
-           }
-           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;
-         }
-       });
+             /**
+              * 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`.
+              */
 
-       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 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`.
+              */
 
-       // `Number.prototype.toPrecision` method
-       // https://tc39.es/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);
-         }
-       });
 
-       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!
-       }
+             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 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");
-       }
+             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`.
+              */
 
-       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$4 (x) {
-         return x;
-       }
+             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.
+              */
 
-       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".
+             function matchesStrictComparable(key, srcValue) {
+               return function (object) {
+                 if (object == null) {
+                   return false;
+                 }
 
-           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.
+                 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.
+              */
 
-           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 memoizeCapped(func) {
+               var result = memoize(func, function (key) {
+                 if (cache.size === MAX_MEMOIZE_SIZE) {
+                   cache.clear();
+                 }
 
-           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 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`.
+              */
 
-           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;
+             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.
 
-             if (type === "c") {
-               valueSuffix = formatType(value) + valueSuffix;
-               value = "";
-             } else {
-               value = +value; // Determine the sign. -0 is not less than 0, but 1 / -0 is!
+               if (!(isCommon || isCombo)) {
+                 return data;
+               } // Use source `thisArg` if available.
 
-               var valueNegative = value < 0 || 1 / value < 0; // Perform the initial formatting.
 
-               value = isNaN(value) ? nan : formatType(Math.abs(value), precision); // Trim insignificant zeros.
+               if (srcBitmask & WRAP_BIND_FLAG) {
+                 data[2] = source[2]; // Set when currying a bound function.
 
-               if (trim) value = formatTrim(value); // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
+                 newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG;
+               } // Compose partial arguments.
 
-               if (valueNegative && +value === 0 && sign !== "+") valueNegative = false; // Compute the prefix and suffix.
 
-               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 value = source[3];
 
-               if (maybeSuffix) {
-                 i = -1, n = value.length;
+               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.
 
-                 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.
 
+               value = source[5];
 
-             if (comma && !zero) value = group(value, Infinity); // Compute the padding.
+               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.
 
-             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.
 
-             if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; // Reconstruct the final output based on the desired alignment.
+               value = source[7];
 
-             switch (align) {
-               case "<":
-                 value = valuePrefix + value + valueSuffix + padding;
-                 break;
+               if (value) {
+                 data[7] = value;
+               } // Use source `ary` if it's smaller.
 
-               case "=":
-                 value = valuePrefix + padding + value + valueSuffix;
-                 break;
 
-               case "^":
-                 value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length);
-                 break;
+               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.
 
-               default:
-                 value = padding + valuePrefix + value + valueSuffix;
-                 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.
+              */
 
-             return numerals(value);
-           }
 
-           format.toString = function () {
-             return specifier + "";
-           };
+             function nativeKeysIn(object) {
+               var result = [];
 
-           return format;
-         }
+               if (object != null) {
+                 for (var key in Object(object)) {
+                   result.push(key);
+                 }
+               }
 
-         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;
-           };
-         }
+               return result;
+             }
+             /**
+              * Converts `value` to a string using `Object.prototype.toString`.
+              *
+              * @private
+              * @param {*} value The value to convert.
+              * @returns {string} Returns the converted string.
+              */
 
-         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 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.
+              */
 
-       function precisionFixed (step) {
-         return Math.max(0, -exponent(Math.abs(step)));
-       }
 
-       function precisionPrefix (step, value) {
-         return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));
-       }
+             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);
 
-       function precisionRound (step, max) {
-         step = Math.abs(step), max = Math.abs(max) - step;
-         return Math.max(0, exponent(max) - exponent(step)) + 1;
-       }
+                 while (++index < length) {
+                   array[index] = args[start + index];
+                 }
 
-       function tickFormat(start, stop, count, specifier) {
-         var step = tickStep(start, stop, count),
-             precision;
-         specifier = formatSpecifier(specifier == null ? ",f" : specifier);
+                 index = -1;
+                 var otherArgs = Array(start + 1);
 
-         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);
-             }
+                 while (++index < start) {
+                   otherArgs[index] = args[index];
+                 }
 
-           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;
+                 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.
+              */
 
-           case "f":
-           case "%":
-             {
-               if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
-               break;
+
+             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`.
+              */
 
-         return format(specifier);
-       }
 
-       function linearish(scale) {
-         var domain = scale.domain;
+             function reorder(array, indexes) {
+               var arrLength = array.length,
+                   length = nativeMin(indexes.length, arrLength),
+                   oldArray = copyArray(array);
 
-         scale.ticks = function (count) {
-           var d = domain();
-           return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
-         };
+               while (length--) {
+                 var index = indexes[length];
+                 array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined$1;
+               }
 
-         scale.tickFormat = function (count, specifier) {
-           var d = domain();
-           return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
-         };
+               return array;
+             }
+             /**
+              * 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.
+              */
 
-         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 (stop < start) {
-             step = start, start = stop, stop = step;
-             step = i0, i0 = i1, i1 = step;
-           }
+             function safeGet(object, key) {
+               if (key === 'constructor' && typeof object[key] === 'function') {
+                 return;
+               }
 
-           while (maxIter-- > 0) {
-             step = tickIncrement(start, stop, count);
+               if (key == '__proto__') {
+                 return;
+               }
 
-             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 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`.
+              */
 
-             prestep = step;
-           }
 
-           return scale;
-         };
+             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.
+              */
 
-         return scale;
-       }
-       function linear$2() {
-         var scale = continuous();
+             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`.
+              */
 
-         scale.copy = function () {
-           return copy(scale, linear$2());
-         };
 
-         initRange.apply(scale, arguments);
-         return linearish(scale);
-       }
+             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`.
+              */
 
-       var nativeExpm1 = Math.expm1;
-       var exp$1 = Math.exp;
+             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.
+              */
 
-       // `Math.expm1` method implementation
-       // https://tc39.es/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;
 
-       function quantize() {
-         var x0 = 0,
-             x1 = 1,
-             n = 1,
-             domain = [0.5],
-             range = [0, 1],
-             unknown;
+             function shortOut(func) {
+               var count = 0,
+                   lastCalled = 0;
+               return function () {
+                 var stamp = nativeNow(),
+                     remaining = HOT_SPAN - (stamp - lastCalled);
+                 lastCalled = stamp;
 
-         function scale(x) {
-           return x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
-         }
+                 if (remaining > 0) {
+                   if (++count >= HOT_COUNT) {
+                     return arguments[0];
+                   }
+                 } else {
+                   count = 0;
+                 }
 
-         function rescale() {
-           var i = -1;
-           domain = new Array(n);
+                 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`.
+              */
 
-           while (++i < n) {
-             domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
-           }
 
-           return scale;
-         }
+             function shuffleSelf(array, size) {
+               var index = -1,
+                   length = array.length,
+                   lastIndex = length - 1;
+               size = size === undefined$1 ? length : size;
 
-         scale.domain = function (_) {
-           var _ref, _ref2;
+               while (++index < size) {
+                 var rand = baseRandom(index, lastIndex),
+                     value = array[rand];
+                 array[rand] = array[index];
+                 array[index] = value;
+               }
 
-           return arguments.length ? ((_ref = _, _ref2 = _slicedToArray(_ref, 2), x0 = _ref2[0], x1 = _ref2[1], _ref), x0 = +x0, x1 = +x1, rescale()) : [x0, x1];
-         };
+               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.
+              */
 
-         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]];
-         };
+             var stringToPath = memoizeCapped(function (string) {
+               var result = [];
 
-         scale.unknown = function (_) {
-           return arguments.length ? (unknown = _, scale) : scale;
-         };
+               if (string.charCodeAt(0) === 46
+               /* . */
+               ) {
+                 result.push('');
+               }
 
-         scale.thresholds = function () {
-           return domain.slice();
-         };
+               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.
+              */
 
-         scale.copy = function () {
-           return quantize().domain([x0, x1]).range(range).unknown(unknown);
-         };
+             function toKey(value) {
+               if (typeof value == 'string' || isSymbol(value)) {
+                 return value;
+               }
 
-         return initRange.apply(linearish(scale), arguments);
-       }
+               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.
+              */
 
-       // https://github.com/tc39/proposal-string-pad-start-end
 
+             function toSource(func) {
+               if (func != null) {
+                 try {
+                   return funcToString.call(func);
+                 } catch (e) {}
 
+                 try {
+                   return func + '';
+                 } catch (e) {}
+               }
 
+               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`.
+              */
 
-       var ceil$1 = Math.ceil;
 
-       // `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;
-         };
-       };
+             function updateWrapDetails(details, bitmask) {
+               arrayEach(wrapFlags, function (pair) {
+                 var value = '_.' + pair[0];
 
-       var stringPad = {
-         // `String.prototype.padStart` method
-         // https://tc39.es/ecma262/#sec-string.prototype.padstart
-         start: createMethod$6(false),
-         // `String.prototype.padEnd` method
-         // https://tc39.es/ecma262/#sec-string.prototype.padend
-         end: createMethod$6(true)
-       };
+                 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.
+              */
 
-       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 wrapperClone(wrapper) {
+               if (wrapper instanceof LazyWrapper) {
+                 return wrapper.clone();
+               }
 
-       // `Date.prototype.toISOString` method implementation
-       // https://tc39.es/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;
+               var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
+               result.__actions__ = copyArray(wrapper.__actions__);
+               result.__index__ = wrapper.__index__;
+               result.__values__ = wrapper.__values__;
+               return result;
+             }
+             /*------------------------------------------------------------------------*/
 
-       // `Date.prototype.toISOString` method
-       // https://tc39.es/ecma262/#sec-date.prototype.toisostring
-       // PhantomJS / old WebKit has a broken implementations
-       _export({ target: 'Date', proto: true, forced: Date.prototype.toISOString !== dateToIsoString }, {
-         toISOString: dateToIsoString
-       });
+             /**
+              * 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']]
+              */
 
-       function behaviorBreathe() {
-         var duration = 800;
-         var steps = 4;
-         var selector = '.selected.shadow, .selected .shadow';
 
-         var _selected = select(null);
+             function chunk(array, size, guard) {
+               if (guard ? isIterateeCall(array, size, guard) : size === undefined$1) {
+                 size = 1;
+               } else {
+                 size = nativeMax(toInteger(size), 0);
+               }
 
-         var _classed = '';
-         var _params = {};
-         var _done = false;
+               var length = array == null ? 0 : array.length;
 
-         var _timer;
+               if (!length || size < 1) {
+                 return [];
+               }
 
-         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 || '');
-           };
-         }
+               var index = 0,
+                   resIndex = 0,
+                   result = Array(nativeCeil(length / size));
 
-         function reset(selection) {
-           selection.style('stroke-opacity', null).style('stroke-width', null).style('fill-opacity', null).style('r', null);
-         }
+               while (index < length) {
+                 result[resIndex++] = baseSlice(array, index, index += 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');
-           });
-         }
+               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]
+              */
 
-         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
 
-             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..
+             function compact(array) {
+               var index = -1,
+                   length = array == null ? 0 : array.length,
+                   resIndex = 0,
+                   result = [];
 
+               while (++index < length) {
+                 var value = array[index];
 
-             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;
-           });
-         }
+                 if (value) {
+                   result[resIndex++] = value;
+                 }
+               }
 
-         function run(surface, fromTo) {
-           var toFrom = fromTo === 'from' ? 'to' : 'from';
-           var currSelected = surface.selectAll(selector);
-           var currClassed = surface.attr('class');
+               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]
+              */
 
-           if (_done || currSelected.empty()) {
-             _selected.call(reset);
 
-             _selected = select(null);
-             return;
-           }
+             function concat() {
+               var length = arguments.length;
 
-           if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
-             _selected.call(reset);
+               if (!length) {
+                 return [];
+               }
 
-             _classed = currClassed;
-             _selected = currSelected.call(calcAnimationParams);
-           }
+               var args = Array(length - 1),
+                   array = arguments[0],
+                   index = length;
 
-           var didCallNextRun = false;
+               while (index--) {
+                 args[index - 1] = arguments[index];
+               }
 
-           _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
+               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]
+              */
 
 
-             if (!select(this).classed('selected')) {
-               reset(select(this));
-             }
-           });
-         }
+             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 }]
+              */
 
-         function behavior(surface) {
-           _done = false;
-           _timer = timer(function () {
-             // wait for elements to actually become selected
-             if (surface.selectAll(selector).empty()) {
-               return false;
-             }
+             var differenceBy = baseRest(function (array, values) {
+               var iteratee = last(values);
 
-             surface.call(run, 'from');
+               if (isArrayLikeObject(iteratee)) {
+                 iteratee = undefined$1;
+               }
 
-             _timer.stop();
+               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 }]
+              */
 
-             return true;
-           }, 20);
-         }
+             var differenceWith = baseRest(function (array, values) {
+               var comparator = last(values);
 
-         behavior.restartIfNeeded = function (surface) {
-           if (_selected.empty()) {
-             surface.call(run, 'from');
+               if (isArrayLikeObject(comparator)) {
+                 comparator = undefined$1;
+               }
 
-             if (_timer) {
-               _timer.stop();
+               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]
+              */
 
-         behavior.off = function () {
-           _done = true;
 
-           if (_timer) {
-             _timer.stop();
-           }
+             function dropRight(array, n, guard) {
+               var length = array == null ? 0 : array.length;
 
-           _selected.interrupt().call(reset);
-         };
+               if (!length) {
+                 return [];
+               }
 
-         return behavior;
-       }
+               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']
+              */
 
-       /* 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 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']
+              */
 
-           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 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]
+              */
 
-             _operation();
-           }
-         }
 
-         function behavior() {
-           if (_operation && _operation.available()) {
-             context.keybinding().on(_operation.keys, keypress);
-           }
+             function fill(array, value, start, end) {
+               var length = array == null ? 0 : array.length;
 
-           return behavior;
-         }
+               if (!length) {
+                 return [];
+               }
 
-         behavior.off = function () {
-           context.keybinding().off(_operation.keys);
-         };
+               if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
+                 start = 0;
+                 end = length;
+               }
 
-         behavior.which = function (_) {
-           if (!arguments.length) return _operation;
-           _operation = _;
-           return behavior;
-         };
+               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
+              */
 
-         return behavior;
-       }
 
-       function operationCircularize(context, selectedIDs) {
-         var _extent;
+             function findIndex(array, predicate, fromIndex) {
+               var length = array == null ? 0 : array.length;
+
+               if (!length) {
+                 return -1;
+               }
 
-         var _actions = selectedIDs.map(getAction).filter(Boolean);
+               var index = fromIndex == null ? 0 : toInteger(fromIndex);
 
-         var _amount = _actions.length === 1 ? 'single' : 'multiple';
+               if (index < 0) {
+                 index = nativeMax(length + index, 0);
+               }
 
-         var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
-           return n.loc;
-         });
+               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
+              */
 
-         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 {
-             _extent = _extent.extend(entity.extent(context.graph()));
-           }
+             function findLastIndex(array, predicate, fromIndex) {
+               var length = array == null ? 0 : array.length;
 
-           return actionCircularize(entityID, context.projection);
-         }
+               if (!length) {
+                 return -1;
+               }
 
-         var operation = function operation() {
-           if (!_actions.length) return;
+               var index = length - 1;
 
-           var combinedAction = function combinedAction(graph, t) {
-             _actions.forEach(function (action) {
-               if (!action.disabled(graph)) {
-                 graph = action(graph, t);
+               if (fromIndex !== undefined$1) {
+                 index = toInteger(fromIndex);
+                 index = fromIndex < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
                }
-             });
 
-             return graph;
-           };
+               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]
+              */
 
-           combinedAction.transitionable = true;
-           context.perform(combinedAction, operation.annotation());
-           window.setTimeout(function () {
-             context.validator().validate();
-           }, 300); // after any transition
-         };
 
-         operation.available = function () {
-           return _actions.length && selectedIDs.length === _actions.length;
-         }; // don't cache this because the visible extent could change
+             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]
+              */
 
 
-         operation.disabled = function () {
-           if (!_actions.length) return '';
+             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]
+              */
 
-           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';
-             }
+             function flattenDepth(array, depth) {
+               var length = array == null ? 0 : array.length;
 
-             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';
-           }
+               if (!length) {
+                 return [];
+               }
 
-           return false;
+               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 }
+              */
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
 
-             if (osm) {
-               var missing = _coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+             function fromPairs(pairs) {
+               var index = -1,
+                   length = pairs == null ? 0 : pairs.length,
+                   result = {};
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
+               while (++index < length) {
+                 var pair = pairs[index];
+                 result[pair[0]] = pair[1];
                }
+
+               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
+              */
 
-             return false;
-           }
-         };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.circularize.' + disable + '.' + _amount) : _t('operations.circularize.description.' + _amount);
-         };
+             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
+              */
 
-         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 indexOf(array, value, fromIndex) {
+               var length = array == null ? 0 : array.length;
 
-       // For example, ⌘Z -> Ctrl+Z
+               if (!length) {
+                 return -1;
+               }
 
-       var uiCmd = function uiCmd(code) {
-         var detected = utilDetect();
+               var index = fromIndex == null ? 0 : toInteger(fromIndex);
 
-         if (detected.os === 'mac') {
-           return code;
-         }
+               if (index < 0) {
+                 index = nativeMax(length + index, 0);
+               }
 
-         if (detected.os === 'win') {
-           if (code === '⌘⇧Z') return 'Ctrl+Y';
-         }
+               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]
+              */
 
-         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];
-           }
-         }
+             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]
+              */
 
-         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;
-       };
+             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 }]
+              */
 
-       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());
+             var intersectionBy = baseRest(function (arrays) {
+               var iteratee = last(arrays),
+                   mapped = arrayMap(arrays, castArrayLikeObject);
 
-         var operation = function operation() {
-           var nextSelectedID;
-           var nextSelectedLoc;
+               if (iteratee === last(mapped)) {
+                 iteratee = undefined$1;
+               } else {
+                 mapped.pop();
+               }
 
-           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.
+               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 }]
+              */
 
-             if (geometry === 'vertex') {
-               var nodes = parent.nodes;
-               var i = nodes.indexOf(id);
+             var intersectionWith = baseRest(function (arrays) {
+               var comparator = last(arrays),
+                   mapped = arrayMap(arrays, castArrayLikeObject);
+               comparator = typeof comparator == 'function' ? comparator : undefined$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 (comparator) {
+                 mapped.pop();
                }
 
-               nextSelectedID = nodes[i];
-               nextSelectedLoc = context.entity(nextSelectedID).loc;
+               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'
+              */
+
+             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
+              */
 
-           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 last(array) {
+               var length = array == null ? 0 : array.length;
+               return length ? array[length - 1] : undefined$1;
              }
-           } else {
-             context.enter(modeBrowse(context));
-           }
-         };
-
-         operation.available = function () {
-           return true;
-         };
+             /**
+              * 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
+              */
 
-         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';
-           }
 
-           return false;
+             function lastIndexOf(array, value, fromIndex) {
+               var length = array == null ? 0 : array.length;
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
+               if (!length) {
+                 return -1;
+               }
 
-             if (osm) {
-               var missing = coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+               var index = length;
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
+               if (fromIndex !== undefined$1) {
+                 index = toInteger(fromIndex);
+                 index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
                }
+
+               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';
+              */
 
-             return false;
-           }
 
-           function hasWikidataTag(id) {
-             var entity = context.entity(id);
-             return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
-           }
+             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 incompleteRelation(id) {
-             var entity = context.entity(id);
-             return entity.type === 'relation' && !entity.isComplete(context.graph());
-           }
 
-           function protectedMember(id) {
-             var entity = context.entity(id);
-             if (entity.type !== 'way') return false;
-             var parents = context.graph().parentRelations(entity);
+             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']
+              */
 
-             for (var i = 0; i < parents.length; i++) {
-               var parent = parents[i];
-               var type = parent.tags.type;
-               var role = parent.memberById(id).role || 'outer';
+             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 }]
+              */
 
-               if (type === 'route' || type === 'boundary' || type === 'multipolygon' && role === 'outer') {
-                 return true;
-               }
+
+             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 }]
+              */
 
-             return false;
-           }
-         };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.delete.' + disable + '.' + multi) : _t('operations.delete.description.' + multi);
-         };
+             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']
+              */
 
-         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 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]
+              */
 
-       function operationOrthogonalize(context, selectedIDs) {
-         var _extent;
+             function remove(array, predicate) {
+               var result = [];
 
-         var _type;
+               if (!(array && array.length)) {
+                 return result;
+               }
 
-         var _actions = selectedIDs.map(chooseAction).filter(Boolean);
+               var index = -1,
+                   indexes = [],
+                   length = array.length;
+               predicate = getIteratee(predicate, 3);
 
-         var _amount = _actions.length === 1 ? 'single' : 'multiple';
+               while (++index < length) {
+                 var value = array[index];
 
-         var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
-           return n.loc;
-         });
+                 if (predicate(value, index, array)) {
+                   result.push(value);
+                   indexes.push(index);
+                 }
+               }
 
-         function chooseAction(entityID) {
-           var entity = context.entity(entityID);
-           var geometry = entity.geometry(context.graph());
+               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]
+              */
 
-           if (!_extent) {
-             _extent = entity.extent(context.graph());
-           } else {
-             _extent = _extent.extend(entity.extent(context.graph()));
-           } // square a line/area
 
+             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`.
+              */
 
-           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 (parents.length === 1) {
-               var way = parents[0];
+             function slice(array, start, end) {
+               var length = array == null ? 0 : array.length;
 
-               if (way.nodes.indexOf(entityID) !== -1) {
-                 return actionOrthogonalize(way.id, context.projection, entityID);
+               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 null;
-         }
 
-         var operation = function operation() {
-           if (!_actions.length) return;
+             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
+              */
 
-           var combinedAction = function combinedAction(graph, t) {
-             _actions.forEach(function (action) {
-               if (!action.disabled(graph)) {
-                 graph = action(graph, t);
-               }
-             });
 
-             return graph;
-           };
+             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
+              */
 
-           combinedAction.transitionable = true;
-           context.perform(combinedAction, operation.annotation());
-           window.setTimeout(function () {
-             context.validator().validate();
-           }, 300); // after any transition
-         };
 
-         operation.available = function () {
-           return _actions.length && selectedIDs.length === _actions.length;
-         }; // don't cache this because the visible extent could change
+             function sortedIndexOf(array, value) {
+               var length = array == null ? 0 : array.length;
 
+               if (length) {
+                 var index = baseSortedIndex(array, value);
 
-         operation.disabled = function () {
-           if (!_actions.length) return '';
+                 if (index < length && eq(array[index], value)) {
+                   return index;
+                 }
+               }
+
+               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
+              */
 
-           var actionDisableds = _actions.map(function (action) {
-             return action.disabled(context.graph());
-           }).filter(Boolean);
 
-           if (actionDisableds.length === _actions.length) {
-             // none of the features can be squared
-             if (new Set(actionDisableds).size > 1) {
-               return 'multiple_blockers';
+             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
+              */
 
-             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';
-           }
 
-           return false;
+             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
+              */
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
 
-             if (osm) {
-               var missing = _coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+             function sortedLastIndexOf(array, value) {
+               var length = array == null ? 0 : array.length;
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
+               if (length) {
+                 var index = baseSortedIndex(array, value, true) - 1;
+
+                 if (eq(array[index], value)) {
+                   return index;
+                 }
                }
-             }
 
-             return false;
-           }
-         };
+               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]
+              */
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.orthogonalize.' + disable + '.' + _amount) : _t('operations.orthogonalize.description.' + _type + '.' + _amount);
-         };
 
-         operation.annotation = function () {
-           return _t('operations.orthogonalize.annotation.' + _type, {
-             n: _actions.length
-           });
-         };
+             function sortedUniq(array) {
+               return array && array.length ? baseSortedUniq(array) : [];
+             }
+             /**
+              * 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.id = 'orthogonalize';
-         operation.keys = [_t('operations.orthogonalize.key')];
-         operation.title = _t('operations.orthogonalize.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
 
-       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());
+             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]
+              */
 
-         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 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);
+              * // => []
+              */
 
 
-         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 take(array, n, guard) {
+               if (!(array && array.length)) {
+                 return [];
+               }
 
-           return false;
+               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);
+              * // => []
+              */
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
 
-             if (osm) {
-               var missing = coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+             function takeRight(array, n, guard) {
+               var length = array == null ? 0 : array.length;
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
+               if (!length) {
+                 return [];
                }
+
+               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');
+              * // => []
+              */
 
-             return false;
-           }
 
-           function incompleteRelation(id) {
-             var entity = context.entity(id);
-             return entity.type === 'relation' && !entity.isComplete(context.graph());
-           }
-         };
+             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');
+              * // => []
+              */
 
-         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 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.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());
+             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 }]
+              */
 
-         var operation = function operation() {
-           context.enter(modeMove(context, selectedIDs));
-         };
+             var unionBy = baseRest(function (arrays) {
+               var iteratee = last(arrays);
 
-         operation.available = function () {
-           return selectedIDs.length > 1 || context.entity(selectedIDs[0]).type !== 'node';
-         };
+               if (isArrayLikeObject(iteratee)) {
+                 iteratee = undefined$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 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 }]
+              */
 
-           return false;
+             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]
+              */
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
+             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 }]
+              */
 
-             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 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 }]
+              */
 
-             return false;
-           }
 
-           function incompleteRelation(id) {
-             var entity = context.entity(id);
-             return entity.type === 'relation' && !entity.isComplete(context.graph());
-           }
-         };
+             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]]
+              */
 
-         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 unzip(array) {
+               if (!(array && array.length)) {
+                 return [];
+               }
 
-         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;
-       }
+               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]
+              */
 
-       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
-         });
 
-         var _prevGraph;
+             function unzipWith(array, iteratee) {
+               if (!(array && array.length)) {
+                 return [];
+               }
 
-         var _prevAngle;
+               var result = unzip(array);
 
-         var _prevTransform;
+               if (iteratee == null) {
+                 return result;
+               }
 
-         var _pivot;
+               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]
+              */
 
-         function doRotate() {
-           var fn;
 
-           if (context.graph() !== _prevGraph) {
-             fn = context.perform;
-           } else {
-             fn = context.replace;
-           } // projection changed, recalculate _pivot
+             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 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 }]
+              */
 
-           var projection = context.projection;
-           var currTransform = projection.transform();
+             var xorBy = baseRest(function (arrays) {
+               var iteratee = last(arrays);
 
-           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);
+               if (isArrayLikeObject(iteratee)) {
+                 iteratee = undefined$1;
+               }
+
+               return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2));
              });
-             _pivot = getPivot(points);
-             _prevAngle = undefined;
-           }
+             /**
+              * 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 }]
+              */
 
-           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();
-         }
+             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]]
+              */
 
-         function getPivot(points) {
-           var _pivot;
+             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 (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);
+             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 }] } }
+              */
 
-             if (polygonHull.length === 2) {
-               _pivot = geoVecInterp(points[0], points[1], 0.5);
-             } else {
-               _pivot = d3_polygonCentroid(d3_polygonHull(points));
+
+             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]
+              */
 
-           return _pivot;
-         }
 
-         function finish(d3_event) {
-           d3_event.stopPropagation();
-           context.replace(actionNoop(), annotation);
-           context.enter(modeSelect(context, entityIDs));
-         }
+             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 cancel() {
-           context.pop();
-           context.enter(modeSelect(context, entityIDs));
-         }
+             /**
+              * 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 undone() {
-           context.enter(modeBrowse(context));
-         }
+             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]
+              */
 
-         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);
-         };
 
-         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 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']
+              */
 
-         mode.selectedIDs = function () {
-           if (!arguments.length) return entityIDs; // no assign
 
-           return mode;
-         };
+             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 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());
+             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);
+               };
 
-         var operation = function operation() {
-           context.enter(modeRotate(context, selectedIDs));
-         };
+               if (length > 1 || this.__actions__.length || !(value instanceof LazyWrapper) || !isIndex(start)) {
+                 return this.thru(interceptor);
+               }
 
-         operation.available = function () {
-           return nodes.length >= 2;
-         };
+               value = value.slice(start, +start + (length ? 1 : 0));
 
-         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';
-           }
+               value.__actions__.push({
+                 'func': thru,
+                 'args': [interceptor],
+                 'thisArg': undefined$1
+               });
 
-           return false;
+               return new LodashWrapper(value, this.__chain__).thru(function (array) {
+                 if (length && !array.length) {
+                   array.push(undefined$1);
+                 }
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
+                 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 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]
+              */
 
-             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 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 }
+              */
 
-             return false;
-           }
 
-           function incompleteRelation(id) {
-             var entity = context.entity(id);
-             return entity.type === 'relation' && !entity.isComplete(context.graph());
-           }
-         };
+             function wrapperNext() {
+               if (this.__values__ === undefined$1) {
+                 this.__values__ = toArray(this.value());
+               }
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.rotate.' + disable + '.' + multi) : _t('operations.rotate.description.' + multi);
-         };
+               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.annotation = function () {
-           return selectedIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.rotate.annotation.feature', {
-             n: selectedIDs.length
-           });
-         };
 
-         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 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]
+              */
 
-       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
-         });
 
-         var _prevGraph;
+             function wrapperPlant(value) {
+               var result,
+                   parent = this;
 
-         var _cache;
+               while (parent instanceof baseLodash) {
+                 var clone = wrapperClone(parent);
+                 clone.__index__ = 0;
+                 clone.__values__ = undefined$1;
 
-         var _origin;
+                 if (result) {
+                   previous.__wrapped__ = clone;
+                 } else {
+                   result = clone;
+                 }
 
-         var _nudgeInterval;
+                 var previous = clone;
+                 parent = parent.__wrapped__;
+               }
 
-         function doMove(nudge) {
-           nudge = nudge || [0, 0];
-           var fn;
+               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]
+              */
 
-           if (_prevGraph !== context.graph()) {
-             _cache = {};
-             _origin = context.map().mouseCoordinates();
-             fn = context.perform;
-           } else {
-             fn = context.overwrite;
-           }
 
-           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 wrapperReverse() {
+               var value = this.__wrapped__;
 
-         function startNudge(nudge) {
-           if (_nudgeInterval) window.clearInterval(_nudgeInterval);
-           _nudgeInterval = window.setInterval(function () {
-             context.map().pan(nudge);
-             doMove(nudge);
-           }, 50);
-         }
+               if (value instanceof LazyWrapper) {
+                 var wrapped = value;
 
-         function stopNudge() {
-           if (_nudgeInterval) {
-             window.clearInterval(_nudgeInterval);
-             _nudgeInterval = null;
-           }
-         }
+                 if (this.__actions__.length) {
+                   wrapped = new LazyWrapper(this);
+                 }
 
-         function move() {
-           doMove();
-           var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());
+                 wrapped = wrapped.reverse();
 
-           if (nudge) {
-             startNudge(nudge);
-           } else {
-             stopNudge();
-           }
-         }
+                 wrapped.__actions__.push({
+                   'func': thru,
+                   'args': [reverse],
+                   'thisArg': undefined$1
+                 });
 
-         function finish(d3_event) {
-           d3_event.stopPropagation();
-           context.replace(actionNoop(), annotation);
-           context.enter(modeSelect(context, entityIDs));
-           stopNudge();
-         }
+                 return new LodashWrapper(wrapped, this.__chain__);
+               }
 
-         function cancel() {
-           if (baseGraph) {
-             while (context.graph() !== baseGraph) {
-               context.pop();
+               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]
+              */
 
-             context.enter(modeBrowse(context));
-           } else {
-             context.pop();
-             context.enter(modeSelect(context, entityIDs));
-           }
 
-           stopNudge();
-         }
+             function wrapperValue() {
+               return baseWrapperValue(this.__wrapped__, this.__actions__);
+             }
+             /*------------------------------------------------------------------------*/
 
-         function undone() {
-           context.enter(modeBrowse(context));
-         }
+             /**
+              * 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 }
+              */
 
-         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([]);
-         };
+             var countBy = createAggregator(function (result, value, key) {
+               if (hasOwnProperty.call(result, key)) {
+                 ++result[key];
+               } else {
+                 baseAssignValue(result, key, 1);
+               }
+             });
+             /**
+              * 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
+              */
 
-         mode.selectedIDs = function () {
-           if (!arguments.length) return entityIDs; // no assign
+             function every(collection, predicate, guard) {
+               var func = isArray(collection) ? arrayEvery : baseEvery;
 
-           return mode;
-         };
+               if (guard && isIterateeCall(collection, predicate, guard)) {
+                 predicate = undefined$1;
+               }
 
-         return mode;
-       }
+               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']
+              */
 
-       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);
-           });
 
-           for (var id in copies) {
-             var oldEntity = oldGraph.entity(id);
-             var newEntity = copies[id];
+             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'
+              */
 
-             extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
 
+             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
+              */
 
-             var parents = context.graph().parentWays(newEntity);
-             var parentCopied = parents.some(function (parent) {
-               return originals.has(parent.id);
-             });
+             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]
+              */
 
-             if (!parentCopied) {
-               newIDs.push(newEntity.id);
+             function flatMap(collection, iteratee) {
+               return baseFlatten(map(collection, iteratee), 1);
              }
-           } // Put pasted objects where mouse pointer is..
-
+             /**
+              * 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]
+              */
 
-           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 behavior() {
-           context.keybinding().on(uiCmd('⌘V'), doPaste);
-           return behavior;
-         }
+             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]]
+              */
 
-         behavior.off = function () {
-           context.keybinding().off(uiCmd('⌘V'));
-         };
 
-         return behavior;
-       }
+             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).
+              */
 
-       // `String.prototype.repeat` method
-       // https://tc39.es/ecma262/#sec-string.prototype.repeat
-       _export({ target: 'String', proto: true }, {
-         repeat: stringRepeat
-       });
 
-       /*
-           `behaviorDrag` is like `d3_behavior.drag`, with the following differences:
+             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`.
+              */
 
-           * 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 behaviorDrag() {
-         var dispatch$1 = dispatch('start', 'move', 'end'); // see also behaviorSelect
+             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'] }
+              */
 
-         var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping
 
-         var _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981
+             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
+              */
 
-         var _origin = null;
-         var _selector = '';
+             function includes(collection, value, fromIndex, guard) {
+               collection = isArrayLike(collection) ? collection : values(collection);
+               fromIndex = fromIndex && !guard ? toInteger(fromIndex) : 0;
+               var length = collection.length;
 
-         var _targetNode;
+               if (fromIndex < 0) {
+                 fromIndex = nativeMax(length + fromIndex, 0);
+               }
 
-         var _targetEntity;
+               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']]
+              */
 
-         var _surface;
 
-         var _pointerId; // use pointer events on supported platforms; fallback to mouse events
+             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 } }
+              */
 
+             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']
+              */
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+             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]]
+              */
 
-         var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');
 
-         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 orderBy(collection, iteratees, orders, guard) {
+               if (collection == null) {
+                 return [];
+               }
 
-         function pointerdown(d3_event) {
-           if (_pointerId) return;
-           _pointerId = d3_event.pointerId || 'mouse';
-           _targetNode = this; // only force reflow once per drag
+               if (!isArray(iteratees)) {
+                 iteratees = iteratees == null ? [] : [iteratees];
+               }
 
-           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);
+               orders = guard ? undefined$1 : orders;
 
-           if (_origin) {
-             offset = _origin.call(_targetNode, _targetEntity);
-             offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
-           } else {
-             offset = [0, 0];
-           }
+               if (!isArray(orders)) {
+                 orders = orders == null ? [] : [orders];
+               }
 
-           d3_event.stopPropagation();
+               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 pointermove(d3_event) {
-             if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
-             var p = pointerLocGetter(d3_event);
 
-             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 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)
+              */
 
-               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 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 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 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']
+              */
 
-             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;
-
-           if (_selector) {
-             delegate = function delegate(d3_event) {
-               var root = this;
-               var target = d3_event.target;
-
-               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);
-                 }
-               }
-             };
-           }
+             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
+              */
 
-           selection.on(_pointerPrefix + 'down.drag' + _selector, delegate);
-         }
 
-         behavior.off = function (selection) {
-           selection.on(_pointerPrefix + 'down.drag' + _selector, null);
-         };
+             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]
+              */
 
-         behavior.selector = function (_) {
-           if (!arguments.length) return _selector;
-           _selector = _;
-           return behavior;
-         };
 
-         behavior.origin = function (_) {
-           if (!arguments.length) return _origin;
-           _origin = _;
-           return behavior;
-         };
+             function sampleSize(collection, n, guard) {
+               if (guard ? isIterateeCall(collection, n, guard) : n === undefined$1) {
+                 n = 1;
+               } else {
+                 n = toInteger(n);
+               }
 
-         behavior.cancel = function () {
-           select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
-           return behavior;
-         };
+               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]
+              */
 
-         behavior.targetNode = function (_) {
-           if (!arguments.length) return _targetNode;
-           _targetNode = _;
-           return behavior;
-         };
 
-         behavior.targetEntity = function (_) {
-           if (!arguments.length) return _targetEntity;
-           _targetEntity = _;
-           return behavior;
-         };
+             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
+              */
 
-         behavior.surface = function (_) {
-           if (!arguments.length) return _surface;
-           _surface = _;
-           return behavior;
-         };
 
-         return utilRebind(behavior, dispatch$1, 'on');
-       }
+             function size(collection) {
+               if (collection == null) {
+                 return 0;
+               }
 
-       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);
+               if (isArrayLike(collection)) {
+                 return isString(collection) ? stringSize(collection) : collection.length;
+               }
 
-         var _nudgeInterval;
+               var tag = getTag(collection);
 
-         var _restoreSelectedIDs = [];
-         var _wasMidpoint = false;
-         var _isCancelled = false;
+               if (tag == mapTag || tag == setTag) {
+                 return collection.size;
+               }
 
-         var _activeEntity;
+               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 _startLoc;
 
-         var _lastLoc;
+             function some(collection, predicate, guard) {
+               var func = isArray(collection) ? arraySome : baseSome;
 
-         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);
-         }
+               if (guard && isIterateeCall(collection, predicate, guard)) {
+                 predicate = undefined$1;
+               }
 
-         function stopNudge() {
-           if (_nudgeInterval) {
-             window.clearInterval(_nudgeInterval);
-             _nudgeInterval = null;
-           }
-         }
+               return func(collection, getIteratee(predicate, 3));
+             }
+             /**
+              * 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]]
+              */
 
-         function moveAnnotation(entity) {
-           return _t('operations.move.annotation.' + entity.geometry(context.graph()));
-         }
 
-         function connectAnnotation(nodeEntity, targetEntity) {
-           var nodeGeometry = nodeEntity.geometry(context.graph());
-           var targetGeometry = targetEntity.geometry(context.graph());
+             var sortBy = baseRest(function (collection, iteratees) {
+               if (collection == null) {
+                 return [];
+               }
 
-           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
+               var length = iteratees.length;
 
-             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 (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
+                 iteratees = [];
+               } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
+                 iteratees = [iteratees[0]];
                }
 
-               return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
-             }
-           }
+               return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
+             });
+             /*------------------------------------------------------------------------*/
 
-           return _t('operations.connect.annotation.from_' + nodeGeometry + '.to_' + targetGeometry);
-         }
+             /**
+              * 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.
+              */
 
-         function shouldSnapToNode(target) {
-           if (!_activeEntity) return false;
-           return _activeEntity.geometry(context.graph()) !== 'vertex' || target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph());
-         }
+             var now = ctxNow || function () {
+               return root.Date.now();
+             };
+             /*------------------------------------------------------------------------*/
 
-         function origin(entity) {
-           return context.projection(entity.loc);
-         }
+             /**
+              * 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 keydown(d3_event) {
-           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-             if (context.surface().classed('nope')) {
-               context.surface().classed('nope-suppressed', true);
-             }
 
-             context.surface().classed('nope', false).classed('nope-disabled', true);
-           }
-         }
+             function after(n, func) {
+               if (typeof func != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
 
-         function keyup(d3_event) {
-           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-             if (context.surface().classed('nope-suppressed')) {
-               context.surface().classed('nope', true);
+               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]
+              */
 
-             context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
-           }
-         }
-
-         function start(d3_event, entity) {
-           _wasMidpoint = entity.type === 'midpoint';
-           var hasHidden = context.features().hasHiddenConnections(entity, context.graph());
-           _isCancelled = !context.editable() || d3_event.shiftKey || hasHidden;
 
-           if (_isCancelled) {
-             if (hasHidden) {
-               context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('modes.drag_node.connected_to_hidden'))();
+             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.
+              */
 
-             return drag.cancel();
-           }
 
-           if (_wasMidpoint) {
-             var midpoint = entity;
-             entity = osmNode();
-             context.perform(actionAddMidpoint(midpoint, entity));
-             entity = context.entity(entity.id); // get post-action entity
+             function before(n, func) {
+               var result;
 
-             var vertex = context.surface().selectAll('.' + entity.id);
-             drag.targetNode(vertex.node()).targetEntity(entity);
-           } else {
-             context.perform(actionNoop());
-           }
+               if (typeof func != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
 
-           _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()`
+               n = toInteger(n);
+               return function () {
+                 if (--n > 0) {
+                   result = func.apply(this, arguments);
+                 }
 
+                 if (n <= 1) {
+                   func = undefined$1;
+                 }
 
-         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 : {};
-           }
-         }
+                 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!'
+              */
 
-         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;
 
-           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;
+             var bind = baseRest(function (func, thisArg, partials) {
+               var bitmask = WRAP_BIND_FLAG;
 
-             if (targetLoc) {
-               // snap to node/vertex - a point target with `.loc`
-               if (shouldSnapToNode(target)) {
-                 loc = targetLoc;
+               if (partials.length) {
+                 var holders = replaceHolders(partials, getHolder(bind));
+                 bitmask |= WRAP_PARTIAL_FLAG;
                }
-             } 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;
+               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!'
+              */
+
+             var bindKey = baseRest(function (object, key, partials) {
+               var bitmask = WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG;
+
+               if (partials.length) {
+                 var holders = replaceHolders(partials, getHolder(bindKey));
+                 bitmask |= WRAP_PARTIAL_FLAG;
                }
-             }
-           }
 
-           context.replace(actionMoveNode(entity.id, loc)); // Below here: validations
+               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]
+              */
 
-           var isInvalid = false; // Check if this connection to `target` could cause relations to break..
+             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]
+              */
 
-           if (target) {
-             isInvalid = hasRelationConflict(entity, target, edge, context.graph());
-           } // Check if this drag causes the geometry to break..
 
+             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);
+              */
 
-           if (!isInvalid) {
-             isInvalid = hasInvalidGeometry(entity, context.graph());
-           }
 
-           var nope = context.surface().classed('nope');
+             function debounce(func, wait, options) {
+               var lastArgs,
+                   lastThis,
+                   maxWait,
+                   result,
+                   timerId,
+                   lastCallTime,
+                   lastInvokeTime = 0,
+                   leading = false,
+                   maxing = false,
+                   trailing = true;
 
-           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('')();
-             }
-           }
+               if (typeof func != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
 
-           var nopeDisabled = context.surface().classed('nope-disabled');
+               wait = toNumber(wait) || 0;
 
-           if (nopeDisabled) {
-             context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
-           } else {
-             context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
-           }
+               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;
+               }
 
-           _lastLoc = loc;
-         } // Uses `actionConnect.disabled()` to know whether this connection is ok..
+               function invokeFunc(time) {
+                 var args = lastArgs,
+                     thisArg = lastThis;
+                 lastArgs = lastThis = undefined$1;
+                 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.
 
-         function hasRelationConflict(entity, target, edge, graph) {
-           var testGraph = graph.update(); // copy
-           // if snapping to way - add midpoint there and consider that the target..
+                 timerId = setTimeout(timerExpired, wait); // Invoke the leading edge.
 
-           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?
+                 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 ids = [entity.id, target.id];
-           return actionConnect(ids).disabled(testGraph);
-         }
+               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.
 
-         function hasInvalidGeometry(entity, graph) {
-           var parents = graph.parentWays(entity);
-           var i, j, k;
+                 return lastCallTime === undefined$1 || timeSinceLastCall >= wait || timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;
+               }
 
-           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
+               function timerExpired() {
+                 var time = now();
 
-             var relations = graph.parentRelations(parent);
+                 if (shouldInvoke(time)) {
+                   return trailingEdge(time);
+                 } // Restart the timer.
 
-             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
 
-               for (k = 0; k < rings.length; k++) {
-                 nodes = rings[k].nodes;
+                 timerId = setTimeout(timerExpired, remainingWait(time));
+               }
 
-                 if (nodes.find(function (n) {
-                   return n.id === entity.id;
-                 })) {
-                   activeIndex = k;
+               function trailingEdge(time) {
+                 timerId = undefined$1; // Only invoke if we have `lastArgs` which means `func` has been
+                 // debounced at least once.
 
-                   if (geoHasSelfIntersections(nodes, entity.id)) {
-                     return 'multipolygonMember';
-                   }
+                 if (trailing && lastArgs) {
+                   return invokeFunc(time);
                  }
 
-                 rings[k].coords = nodes.map(function (n) {
-                   return n.loc;
-                 });
-               } // test active ring for intersections with other rings in the multipolygon
+                 lastArgs = lastThis = undefined$1;
+                 return result;
+               }
 
+               function cancel() {
+                 if (timerId !== undefined$1) {
+                   clearTimeout(timerId);
+                 }
 
-               for (k = 0; k < rings.length; k++) {
-                 if (k === activeIndex) continue; // make sure active ring doesn't cross passive rings
+                 lastInvokeTime = 0;
+                 lastArgs = lastCallTime = lastThis = timerId = undefined$1;
+               }
 
-                 if (geoHasLineIntersections(rings[activeIndex].nodes, rings[k].nodes, entity.id)) {
-                   return 'multipolygonRing';
-                 }
+               function flush() {
+                 return timerId === undefined$1 ? result : trailingEdge(now());
                }
-             } // 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.
 
+               function debounced() {
+                 var time = now(),
+                     isInvoking = shouldInvoke(time);
+                 lastArgs = arguments;
+                 lastThis = this;
+                 lastCallTime = time;
 
-             if (activeIndex === null) {
-               nodes = parent.nodes.map(function (nodeID) {
-                 return graph.entity(nodeID);
-               });
+                 if (isInvoking) {
+                   if (timerId === undefined$1) {
+                     return leadingEdge(lastCallTime);
+                   }
 
-               if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
-                 return parent.geometry(graph);
-               }
-             }
-           }
+                   if (maxing) {
+                     // Handle invocations in a tight loop.
+                     clearTimeout(timerId);
+                     timerId = setTimeout(timerExpired, wait);
+                     return invokeFunc(lastCallTime);
+                   }
+                 }
 
-           return false;
-         }
+                 if (timerId === undefined$1) {
+                   timerId = setTimeout(timerExpired, wait);
+                 }
 
-         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());
+                 return result;
+               }
 
-           if (nudge) {
-             startNudge(d3_event, entity, nudge);
-           } else {
-             stopNudge();
-           }
-         }
+               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.
+              */
 
-         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
 
-           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));
-           }
+             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.
+              */
 
-           if (wasPoint) {
-             context.enter(modeSelect(context, [entity.id]));
-           } else {
-             var reselection = _restoreSelectedIDs.filter(function (id) {
-               return context.graph().hasEntity(id);
+             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']
+              */
 
-             if (reselection.length) {
-               context.enter(modeSelect(context, reselection));
-             } else {
-               context.enter(modeBrowse(context));
+             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 _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 memoize(func, resolver) {
+               if (typeof func != 'function' || resolver != null && typeof resolver != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
 
-           action.transitionable = true;
-           return action;
-         }
+               var memoized = function memoized() {
+                 var args = arguments,
+                     key = resolver ? resolver.apply(this, args) : args[0],
+                     cache = memoized.cache;
 
-         function cancel() {
-           drag.cancel();
-           context.enter(modeBrowse(context));
-         }
+                 if (cache.has(key)) {
+                   return cache.get(key);
+                 }
 
-         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 result = func.apply(this, args);
+                 memoized.cache = cache.set(key, result) || cache;
+                 return result;
+               };
 
-         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);
-         };
+               memoized.cache = new (memoize.Cache || MapCache)();
+               return memoized;
+             } // Expose `MapCache`.
 
-         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
+             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]
+              */
 
-           return mode;
-         };
+             function negate(predicate) {
+               if (typeof predicate != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
 
-         mode.activeID = function () {
-           if (!arguments.length) return _activeEntity && _activeEntity.id; // no assign
+               return function () {
+                 var args = arguments;
 
-           return mode;
-         };
+                 switch (args.length) {
+                   case 0:
+                     return !predicate.call(this);
 
-         mode.restoreSelectedIDs = function (_) {
-           if (!arguments.length) return _restoreSelectedIDs;
-           _restoreSelectedIDs = _;
-           return mode;
-         };
+                   case 1:
+                     return !predicate.call(this, args[0]);
 
-         mode.behavior = drag;
-         return mode;
-       }
+                   case 2:
+                     return !predicate.call(this, args[0], args[1]);
 
-       // @@search logic
-       fixRegexpWellKnownSymbolLogic('search', 1, function (SEARCH, nativeSearch, maybeCallNative) {
-         return [
-           // `String.prototype.search` method
-           // https://tc39.es/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.es/ecma262/#sec-regexp.prototype-@@search
-           function (regexp) {
-             var res = maybeCallNative(nativeSearch, regexp, this);
-             if (res.done) return res.value;
+                   case 3:
+                     return !predicate.call(this, args[0], args[1], args[2]);
+                 }
 
-             var rx = anObject(regexp);
-             var S = String(this);
+                 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
+              */
 
-             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;
-           }
-         ];
-       });
 
-       // 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 */ });
-       });
+             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]
+              */
 
-       // `Promise.prototype.finally` method
-       // https://tc39.es/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
-           );
-         }
-       });
 
-       // patch native Promise.prototype for native async functions
-       if ( typeof nativePromiseConstructor == 'function' && !nativePromiseConstructor.prototype['finally']) {
-         redefine(nativePromiseConstructor.prototype, 'finally', getBuiltIn('Promise').prototype['finally']);
-       }
+             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);
 
-       function quickselect$1(arr, k, left, right, compare) {
-         quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
-       }
+                 while (++index < length) {
+                   args[index] = transforms[index].call(this, args[index]);
+                 }
 
-       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);
-           }
+                 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'
+              */
 
-           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);
+             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'
+              */
 
-           while (i < j) {
-             swap$1(arr, i, j);
-             i++;
-             j--;
+             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']
+              */
 
-             while (compare(arr[i], t) < 0) {
-               i++;
-             }
+             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'
+              */
 
-             while (compare(arr[j], t) > 0) {
-               j--;
+             function rest(func, start) {
+               if (typeof func != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
+
+               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
+              */
 
-           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 spread(func, start) {
+               if (typeof func != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
 
-       function defaultCompare(a, b) {
-         return a < b ? -1 : a > b ? 1 : 0;
-       }
+               start = start == null ? 0 : nativeMax(toInteger(start), 0);
+               return baseRest(function (args) {
+                 var array = args[start],
+                     otherArgs = castSlice(args, 0, start);
 
-       var RBush = /*#__PURE__*/function () {
-         function RBush() {
-           var maxEntries = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 9;
+                 if (array) {
+                   arrayPush(otherArgs, array);
+                 }
 
-           _classCallCheck(this, RBush);
+                 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);
+              */
 
-           // 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();
-         }
 
-         _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 = [];
+             function throttle(func, wait, options) {
+               var leading = true,
+                   trailing = true;
 
-             while (node) {
-               for (var i = 0; i < node.children.length; i++) {
-                 var child = node.children[i];
-                 var childBBox = node.leaf ? toBBox(child) : child;
+               if (typeof func != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
 
-                 if (intersects(bbox, childBBox)) {
-                   if (node.leaf) result.push(child);else if (contains(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
-                 }
+               if (isObject(options)) {
+                 leading = 'leading' in options ? !!options.leading : leading;
+                 trailing = 'trailing' in options ? !!options.trailing : trailing;
                }
 
-               node = nodesToSearch.pop();
+               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]
+              */
 
-             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 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 (intersects(bbox, childBBox)) {
-                   if (node.leaf || contains(bbox, childBBox)) return true;
-                   nodesToSearch.push(child);
-                 }
-               }
 
-               node = nodesToSearch.pop();
+             function wrap(value, wrapper) {
+               return partial(castFunction(wrapper), value);
              }
+             /*------------------------------------------------------------------------*/
 
-             return false;
-           }
-         }, {
-           key: "load",
-           value: function load(data) {
-             if (!(data && data.length)) return this;
+             /**
+              * 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
+              */
 
-             if (data.length < this._minEntries) {
-               for (var i = 0; i < data.length; i++) {
-                 this.insert(data[i]);
+
+             function castArray() {
+               if (!arguments.length) {
+                 return [];
                }
 
-               return this;
-             } // recursively build the tree with the given data from scratch using OMT algorithm
+               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
+              */
 
 
-             var node = this._build(data.slice(), 0, data.length - 1, 0);
+             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
+              */
 
-             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
 
+             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
+              */
 
-               this._insert(node, this.data.height - node.height - 1, true);
+
+             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
+              */
 
-             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 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 (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 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
+              */
 
-                   this._condense(path);
 
-                   return this;
-                 }
-               }
+             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
+              */
 
-               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
 
+             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 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
+              */
+
+             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
+              */
+
+             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
+              */
+
+             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
+              */
+
+             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
+              */
 
-             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 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
+              */
 
-             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 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
+              */
 
-             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));
+             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
+              */
+
+             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
+              */
 
-             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 isEmpty(value) {
+               if (value == null) {
+                 return true;
+               }
 
-             for (var i = left; i <= right; i += N1) {
-               var right2 = Math.min(i + N1 - 1, right);
-               multiSelect(items, i, right2, N2, this.compareMinY);
+               if (isArrayLike(value) && (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' || isBuffer(value) || isTypedArray(value) || isArguments(value))) {
+                 return !value.length;
+               }
 
-               for (var j = i; j <= right2; j += N2) {
-                 var right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
+               var tag = getTag(value);
 
-                 node.children.push(this._build(items, j, right3, height - 1));
+               if (tag == mapTag || tag == setTag) {
+                 return !value.size;
                }
-             }
-
-             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
+               if (isPrototype(value)) {
+                 return !baseKeys(value).length;
+               }
 
-                 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 key in value) {
+                 if (hasOwnProperty.call(value, key)) {
+                   return false;
                  }
                }
 
-               node = targetNode || node.children[0];
+               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
+              */
 
-             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
-
-             var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
 
+             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
+              */
 
-             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 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
+              */
 
-                 level--;
-               } else break;
-             } // adjust bboxes along the insertion path
 
+             function isError(value) {
+               if (!isObjectLike(value)) {
+                 return false;
+               }
 
-             this._adjustParentBBoxes(bbox, insertPath, level);
-           } // split overflowed node into two
+               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
+              */
 
-         }, {
-           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);
+             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
+              */
 
-             var splitIndex = this._chooseSplitIndex(node, m, M);
 
-             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 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.
 
-             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 (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;
-                 }
-               }
+               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 index || M - m;
-           } // sorts node children by the best axis for split
-
-         }, {
-           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 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
+              */
 
-             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
 
+             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
+              */
 
-             if (xMargin < yMargin) node.children.sort(compareMinX);
-           } // total margin of all possible split distributions where each node is at least m full
 
-         }, {
-           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);
+             function isObject(value) {
+               var type = _typeof(value);
 
-             for (var i = m; i < M - m; i++) {
-               var child = node.children[i];
-               extend$1(leftBBox, node.leaf ? toBBox(child) : child);
-               margin += bboxMargin(leftBBox);
+               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
+              */
 
-             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);
+             function isObjectLike(value) {
+               return value != null && _typeof(value) == 'object';
              }
-           }
-         }, {
-           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);
+             /**
+              * 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
+              */
+
+
+             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
+              */
+
+             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 RBush;
-       }();
 
-       function findItem(item, items, equalsFn) {
-         if (!equalsFn) return items.indexOf(item);
+             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
+              */
 
-         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 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
+              */
 
 
-       function calcBBox(node, toBBox) {
-         distBBox(node, 0, node.children.length, toBBox, node);
-       } // min bounding rectangle of node children from k to p-1
+             function isNative(value) {
+               if (isMaskable(value)) {
+                 throw new Error(CORE_ERROR_TEXT);
+               }
 
+               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
+              */
 
-       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 (var i = k; i < p; i++) {
-           var child = node.children[i];
-           extend$1(destNode, node.leaf ? toBBox(child) : child);
-         }
+             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 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 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
+              */
 
-       function compareNodeMinX(a, b) {
-         return a.minX - b.minX;
-       }
 
-       function compareNodeMinY(a, b) {
-         return a.minY - b.minY;
-       }
+             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
+              */
 
-       function bboxArea(a) {
-         return (a.maxX - a.minX) * (a.maxY - a.minY);
-       }
 
-       function bboxMargin(a) {
-         return a.maxX - a.minX + (a.maxY - a.minY);
-       }
+             function isPlainObject(value) {
+               if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
+                 return false;
+               }
 
-       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));
-       }
+               var proto = getPrototype(value);
 
-       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);
-       }
+               if (proto === null) {
+                 return true;
+               }
 
-       function contains(a, b) {
-         return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
-       }
+               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
+              */
 
-       function intersects(a, b) {
-         return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
-       }
 
-       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 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
+              */
 
+             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
+              */
 
-       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 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
+              */
 
-       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
+             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
+              */
 
-       var _cache;
 
-       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];
+             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
+              */
 
-       function abortRequest(controller) {
-         if (controller) {
-           controller.abort();
-         }
-       }
 
-       function abortUnwantedRequests(cache, tiles) {
-         Object.keys(cache.inflightTile).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k === tile.id;
-           });
+             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
+              */
 
-           if (!wanted) {
-             abortRequest(cache.inflightTile[k]);
-             delete cache.inflightTile[k];
-           }
-         });
-       }
+             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
+              */
 
-       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 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
+              */
 
 
-       function updateRtree(item, replace) {
-         _cache.rtree.remove(item, function (a, b) {
-           return a.data.id === b.data.id;
-         });
+             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
+              */
 
-         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];
+             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
+              */
 
-         if (!issueTemplate) {
-           /* eslint-disable no-console */
-           console.log('No Template: ', d.whichType);
-           console.log('  ', d.description);
-           /* eslint-enable no-console */
+             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);
+              * // => []
+              */
 
-           return;
-         } // some descriptions are just fixed text
+             function toArray(value) {
+               if (!value) {
+                 return [];
+               }
 
+               if (isArrayLike(value)) {
+                 return isString(value) ? stringToArray(value) : copyArray(value);
+               }
 
-         if (!issueTemplate.regex) return; // regex pattern should match description with variable details captured
+               if (symIterator && value[symIterator]) {
+                 return iteratorToArray(value[symIterator]());
+               }
 
-         var errorRegex = new RegExp(issueTemplate.regex, 'i');
-         var errorMatch = errorRegex.exec(d.description);
+               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
+              */
 
-         if (!errorMatch) {
-           /* eslint-disable no-console */
-           console.log('Unmatched: ', d.whichType);
-           console.log('  ', d.description);
-           console.log('  ', errorRegex);
-           /* eslint-enable no-console */
 
-           return;
-         }
+             function toFinite(value) {
+               if (!value) {
+                 return value === 0 ? value : 0;
+               }
 
-         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] : '';
+               value = toNumber(value);
 
-           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 (value === INFINITY || value === -INFINITY) {
+                 var sign = value < 0 ? -1 : 1;
+                 return sign * MAX_INTEGER;
+               }
 
-             if (_krData.localizeStrings[compare]) {
-               // some replacement strings can be localized
-               capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+               return value === value ? value : 0;
              }
-           }
-
-           replacements['var' + i] = capture;
-         }
+             /**
+              * 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
+              */
 
-         return replacements;
-       }
 
-       function parseError(capture, idType) {
-         var compare = capture.toLowerCase();
+             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
+              */
 
-         if (_krData.localizeStrings[compare]) {
-           // some replacement strings can be localized
-           capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
-         }
 
-         switch (idType) {
-           // link a string like "this node"
-           case 'this':
-             capture = linkErrorObject(capture);
-             break;
+             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
+              */
 
-           case 'url':
-             capture = linkURL(capture);
-             break;
-           // link an entity ID
 
-           case 'n':
-           case 'w':
-           case 'r':
-             capture = linkEntity(idType + capture);
-             break;
-           // some errors have more complex ID lists/variance
+             function toNumber(value) {
+               if (typeof value == 'number') {
+                 return value;
+               }
 
-           case '20':
-             capture = parse20(capture);
-             break;
+               if (isSymbol(value)) {
+                 return NAN;
+               }
 
-           case '211':
-             capture = parse211(capture);
-             break;
+               if (isObject(value)) {
+                 var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
+                 value = isObject(other) ? other + '' : other;
+               }
 
-           case '231':
-             capture = parse231(capture);
-             break;
+               if (typeof value != 'string') {
+                 return value === 0 ? value : +value;
+               }
 
-           case '294':
-             capture = parse294(capture);
-             break;
+               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 }
+              */
 
-           case '370':
-             capture = parse370(capture);
-             break;
-         }
 
-         return capture;
+             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
+              */
 
-         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 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 linkURL(d) {
-           return "<a class=\"kr_external_link\" target=\"_blank\" href=\"".concat(d, "\">").concat(d, "</a>");
-         } // arbitrary node list of form: #ID, #ID, #ID...
 
+             function toString(value) {
+               return value == null ? '' : baseToString(value);
+             }
+             /*------------------------------------------------------------------------*/
 
-         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)...
+             /**
+              * 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 parse231(capture) {
-           var newList = []; // unfortunately 'layer' can itself contain commas, so we split on '),'
+             var assign = createAssigner(function (object, source) {
+               if (isPrototype(source) || isArrayLike(source)) {
+                 copyObject(source, keys(source), object);
+                 return;
+               }
 
-           var items = capture.split('),');
-           items.forEach(function (item) {
-             var match = item.match(/\#(\d+)\((.+)\)?/);
+               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 }
+              */
 
-             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...
+             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 }
+              */
 
+             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 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
+             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]
+              */
 
-             var role = "\"".concat(item[0], "\""); // first letter of node/relation provides the type
+             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
+              */
 
-             var idType = item[1].slice(0, 1); // ID has # at the front
+             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 }
+              */
 
-             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 defaults = baseRest(function (object, sources) {
+               object = Object(object);
+               var index = -1;
+               var length = sources.length;
+               var guard = length > 2 ? sources[2] : undefined$1;
 
-         function parse370(capture) {
-           if (!capture) return '';
-           var match = capture.match(/\(including the name (\'.+\')\)/);
+               if (guard && isIterateeCall(sources[0], sources[1], guard)) {
+                 length = 1;
+               }
 
-           if (match && match.length) {
-             return _t('QA.keepRight.errorTypes.370.including_the_name', {
-               name: match[1]
-             });
-           }
+               while (++index < length) {
+                 var source = sources[index];
+                 var props = keysIn(source);
+                 var propsIndex = -1;
+                 var propsLength = props.length;
 
-           return '';
-         } // arbitrary node list of form: #ID,#ID,#ID...
+                 while (++propsIndex < propsLength) {
+                   var key = props[propsIndex];
+                   var value = object[key];
 
+                   if (value === undefined$1 || eq(value, objectProto[key]) && !hasOwnProperty.call(object, key)) {
+                     object[key] = source[key];
+                   }
+                 }
+               }
 
-         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(', ');
-         }
-       }
+               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 } }
+              */
 
-       var serviceKeepRight = {
-         title: 'keepRight',
-         init: function init() {
-           _mainFileFetcher.get('keepRight').then(function (d) {
-             return _krData = d;
-           });
+             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'
+              */
 
-           if (!_cache) {
-             this.reset();
-           }
+             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'
+              */
 
-           this.event = utilRebind(this, dispatch$1, 'on');
-         },
-         reset: function reset() {
-           if (_cache) {
-             Object.values(_cache.inflightTile).forEach(abortRequest);
-           }
 
-           _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;
+             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).
+              */
 
-           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 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'.
+              */
 
-           abortUnwantedRequests(_cache, tiles); // issue new requests..
 
-           tiles.forEach(function (tile) {
-             if (_cache.loadedTile[tile.id] || _cache.inflightTile[tile.id]) return;
+             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).
+              */
 
-             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;
+             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'.
+              */
 
-               if (!data || !data.features || !data.features.length) {
-                 throw new Error('No Data');
-               }
 
-               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 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']
+              */
 
-                 var issueTemplate = _krData.errorTypes[itemType];
-                 var parentIssueType = (Math.floor(itemType / 10) * 10).toString(); // try to handle error type directly, fallback to parent error type.
 
-                 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.
+             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']
+              */
 
-                 switch (whichType) {
-                   case '170':
-                     description = "This feature has a FIXME tag: ".concat(description);
-                     break;
 
-                   case '292':
-                   case '293':
-                     description = description.replace('A turn-', 'This turn-');
-                     break;
+             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'
+              */
 
-                   case '294':
-                   case '295':
-                   case '296':
-                   case '297':
-                   case '298':
-                     description = "This turn-restriction~".concat(description);
-                     break;
 
-                   case '300':
-                     description = 'This highway is missing a maxspeed tag';
-                     break;
+             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
+              */
 
-                   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 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
+              */
 
-                 var coincident = false;
 
-                 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);
+             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' }
+              */
 
-                 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;
 
-                 _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;
+             var invert = createInverter(function (result, value, key) {
+               if (value != null && typeof value.toString != 'function') {
+                 value = nativeObjectToString.call(value);
+               }
 
-           if (_cache.inflightPost[d.id]) {
-             return callback({
-               message: 'Error update already inflight',
-               status: -2
-             }, d);
-           }
+               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'] }
+              */
 
-           var params = {
-             schema: d.schema,
-             id: d.id
-           };
+             var invertBy = createInverter(function (result, value, key) {
+               if (value != null && typeof value.toString != 'function') {
+                 value = nativeObjectToString.call(value);
+               }
 
-           if (d.newStatus) {
-             params.st = d.newStatus;
-           }
+               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]
+              */
 
-           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.
+             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']
+              */
 
+             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)
+              */
 
-           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)
 
-           d3_json(url, {
-             signal: controller.signal
-           })["finally"](function () {
-             delete _cache.inflightPost[d.id];
+             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 }
+              */
 
-             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 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)
+              */
 
-             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();
-         }
-       };
 
-       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
+             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 }] }
+              */
 
-       var _cache$1;
 
-       function abortRequest$1(i) {
-         Object.values(i).forEach(function (controller) {
-           if (controller) {
-             controller.abort();
-           }
-         });
-       }
+             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 abortUnwantedRequests$1(cache, tiles) {
-         Object.keys(cache.inflightTile).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k === tile.id;
-           });
+             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' }
+              */
 
-           if (!wanted) {
-             abortRequest$1(cache.inflightTile[k]);
-             delete cache.inflightTile[k];
-           }
-         });
-       }
+             var omit = flatRest(function (object, paths) {
+               var result = {};
 
-       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
+               if (object == null) {
+                 return result;
+               }
 
+               var isDeep = false;
+               paths = arrayMap(paths, function (path) {
+                 path = castPath(path, object);
+                 isDeep || (isDeep = path.length > 1);
+                 return path;
+               });
+               copyObject(object, getAllKeysIn(object), result);
 
-       function updateRtree$1(item, replace) {
-         _cache$1.rtree.remove(item, function (a, b) {
-           return a.data.id === b.data.id;
-         });
+               if (isDeep) {
+                 result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone);
+               }
 
-         if (replace) {
-           _cache$1.rtree.insert(item);
-         }
-       }
+               var length = paths.length;
 
-       function linkErrorObject(d) {
-         return "<a class=\"error_object_link\">".concat(d, "</a>");
-       }
+               while (length--) {
+                 baseUnset(result, paths[length]);
+               }
 
-       function linkEntity(d) {
-         return "<a class=\"error_entity_link\">".concat(d, "</a>");
-       }
+               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' }
+              */
 
-       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 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 }
+              */
 
-       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
+             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 pickBy(object, predicate) {
+               if (object == null) {
+                 return {};
+               }
 
-         return angle * 180 / Math.PI;
-       } // Assuming range [0,360)
+               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'
+              */
 
 
-       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 result(object, path, defaultValue) {
+               path = castPath(path, object);
+               var index = -1,
+                   length = path.length; // Ensure the loop is entered when path is empty.
 
+               if (!length) {
+                 length = 1;
+                 object = undefined$1;
+               }
 
-       function preventCoincident(loc, bumpUp) {
-         var coincident = false;
+               while (++index < length) {
+                 var value = object == null ? undefined$1 : object[toKey(path[index])];
 
-         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 (value === undefined$1) {
+                   index = length;
+                   value = defaultValue;
+                 }
 
-         return loc;
-       }
+                 object = isFunction(value) ? value.call(object) : value;
+               }
 
-       var serviceImproveOSM = {
-         title: 'improveOSM',
-         init: function init() {
-           _mainFileFetcher.get('qa_data').then(function (d) {
-             return _impOsmData = d.improveOSM;
-           });
+               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
+              */
 
-           if (!_cache$1) {
-             this.reset();
-           }
 
-           this.event = utilRebind(this, dispatch$2, 'on');
-         },
-         reset: function reset() {
-           if (_cache$1) {
-             Object.values(_cache$1.inflightTile).forEach(abortRequest$1);
-           }
+             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' } }
+              */
 
-           _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 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)
+              */
 
-           }; // 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
+             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)
+              */
 
-           abortUnwantedRequests$1(_cache$1, tiles); // issue new requests..
+             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'] }
+              */
 
-           tiles.forEach(function (tile) {
-             if (_cache$1.loadedTile[tile.id] || _cache$1.inflightTile[tile.id]) return;
+             function transform(object, iteratee, accumulator) {
+               var isArr = isArray(object),
+                   isArrLike = isArr || isBuffer(object) || isTypedArray(object);
+               iteratee = getIteratee(iteratee, 4);
 
-             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];
+               if (accumulator == null) {
+                 var Ctor = object && object.constructor;
 
-             var params = Object.assign({}, options, {
-               east: east,
-               south: south,
-               west: west,
-               north: north
-             }); // 3 separate requests to store for each tile
+                 if (isArrLike) {
+                   accumulator = isArr ? new Ctor() : [];
+                 } else if (isObject(object)) {
+                   accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};
+                 } else {
+                   accumulator = {};
+                 }
+               }
 
-             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'
+               (isArrLike ? arrayEach : baseForOwn)(object, function (value, index, object) {
+                 return iteratee(accumulator, value, index, object);
                });
-               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];
-
-                 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 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': {} }] };
+              */
 
 
-                 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 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
+              */
 
-                     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
 
+             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' } }
+              */
 
-                     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
 
-                     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;
+             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']
+              */
 
-                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
-                   });
-                 } // Tiles at high zoom == missing roads
 
+             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)
+              */
 
-                 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
 
-                     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
+             function valuesIn(object) {
+               return object == null ? [] : baseValues(object, keysIn(object));
+             }
+             /*------------------------------------------------------------------------*/
 
-                     if (numberOfTrips === -1) {
-                       d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
-                     }
+             /**
+              * 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
+              */
 
-                     _cache$1.data[d.id] = d;
 
-                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
-                   });
-                 } // Entities at high zoom == turn restrictions
+             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;
+               }
 
-                 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
+               if (lower !== undefined$1) {
+                 lower = toNumber(lower);
+                 lower = lower === lower ? lower : 0;
+               }
 
-                     var loc = preventCoincident([point.lon, point.lat], true); // Elements are presented in a strange way
+               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
+              */
 
-                     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 _segments$0$points = _slicedToArray(segments[0].points, 2),
-                         p1 = _segments$0$points[0],
-                         p2 = _segments$0$points[1];
+             function inRange(number, start, end) {
+               start = toFinite(start);
 
-                     var dir_of_travel = cardinalDirection(relativeBearing(p1, p2)); // Variables used in the description
+               if (end === undefined$1) {
+                 end = start;
+                 start = 0;
+               } else {
+                 end = toFinite(end);
+               }
 
-                     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;
+               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
+              */
 
-                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
 
-                     dispatch$2.call('loaded');
-                   });
-                 }
-               })["catch"](function () {
-                 delete _cache$1.inflightTile[tile.id][k];
+             function random(lower, upper, floating) {
+               if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {
+                 upper = floating = undefined$1;
+               }
 
-                 if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
-                   delete _cache$1.inflightTile[tile.id];
-                   _cache$1.loadedTile[tile.id] = true;
+               if (floating === undefined$1) {
+                 if (typeof upper == 'boolean') {
+                   floating = upper;
+                   upper = undefined$1;
+                 } else if (typeof lower == 'boolean') {
+                   floating = lower;
+                   lower = undefined$1;
                  }
-               });
-             });
-             _cache$1.inflightTile[tile.id] = requests;
-           });
-         },
-         getComments: function getComments(item) {
-           var _this2 = this;
+               }
 
-           // If comments already retrieved no need to do so again
-           if (item.comments) {
-             return Promise.resolve(item);
-           }
+               if (lower === undefined$1 && upper === undefined$1) {
+                 lower = 0;
+                 upper = 1;
+               } else {
+                 lower = toFinite(lower);
 
-           var key = item.issueKey;
-           var qParams = {};
+                 if (upper === undefined$1) {
+                   upper = lower;
+                   lower = 0;
+                 } else {
+                   upper = toFinite(upper);
+                 }
+               }
 
-           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;
-           }
+               if (lower > upper) {
+                 var temp = lower;
+                 lower = upper;
+                 upper = temp;
+               }
 
-           var url = "".concat(_impOsmUrls[key], "/retrieveComments?") + utilQsString(qParams);
+               if (floating || lower % 1 || upper % 1) {
+                 var rand = nativeRandom();
+                 return nativeMin(lower + rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1))), upper);
+               }
 
-           var cacheComments = function cacheComments(data) {
-             // Assign directly for immediate use afterwards
-             // comments are served newest to oldest
-             item.comments = data.comments ? data.comments.reverse() : [];
+               return baseRandom(lower, upper);
+             }
+             /*------------------------------------------------------------------------*/
 
-             _this2.replaceItem(item);
-           };
+             /**
+              * 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'
+              */
 
-           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 (_cache$1.inflightPost[d.id]) {
-             return callback({
-               message: 'Error update already inflight',
-               status: -2
-             }, d);
-           } // Payload can only be sent once username is established
+             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 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'
+              */
 
 
-           serviceOsm.userDetails(sendPayload.bind(this));
+             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 sendPayload(err, user) {
-             var _this3 = this;
 
-             if (err) {
-               return callback(err, d);
+             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'
+              */
 
-             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 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/)');
+              * // => '\[lodash\]\(https://lodash\.com/\)'
+              */
 
 
-             if (d.newComment) {
-               payload.text = d.newComment;
+             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'
+              */
 
-             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
-                 });
+             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'
+              */
 
-                 _this3.replaceItem(d.update({
-                   comments: comments,
-                   newComment: undefined
-                 }));
-               } else {
-                 _this3.removeItem(d);
+             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'
+              */
 
-                 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;
-                   }
+             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'
+              */
 
-                   _cache$1.closed[d.issueKey] += 1;
-                 }
+             function pad(string, length, chars) {
+               string = toString(string);
+               length = toInteger(length);
+               var strLength = length ? stringSize(string) : 0;
+
+               if (!length || strLength >= length) {
+                 return string;
                }
 
-               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
+               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'
+              */
 
-           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 quot = /"/g;
+             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'
+              */
 
-       // B.2.3.2.1 CreateHTML(string, tag, attribute, value)
-       // https://tc39.es/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 + '>';
-       };
 
-       // 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;
-         });
-       };
+             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]
+              */
 
-       // `String.prototype.link` method
-       // https://tc39.es/ecma262/#sec-string.prototype.link
-       _export({ target: 'String', proto: true, forced: stringHtmlForced('link') }, {
-         link: function link(url) {
-           return createHtml(this, 'a', 'href', url);
-         }
-       });
 
-       var $trimEnd = stringTrim.end;
+             function parseInt(string, radix, guard) {
+               if (guard || radix == null) {
+                 radix = 0;
+               } else if (radix) {
+                 radix = +radix;
+               }
+
+               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 FORCED$e = stringTrimForced('trimEnd');
+             function repeat(string, n, guard) {
+               if (guard ? isIterateeCall(string, n, guard) : n === undefined$1) {
+                 n = 1;
+               } else {
+                 n = toInteger(n);
+               }
 
-       var trimEnd = FORCED$e ? function trimEnd() {
-         return $trimEnd(this);
-       } : ''.trimEnd;
+               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'
+              */
 
-       // `String.prototype.{ trimEnd, trimRight }` methods
-       // https://tc39.es/ecma262/#sec-string.prototype.trimend
-       // https://tc39.es/ecma262/#String.prototype.trimright
-       _export({ target: 'String', proto: true, forced: FORCED$e }, {
-         trimEnd: trimEnd,
-         trimRight: trimEnd
-       });
 
-       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 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'
+              */
 
-         function changeDefaults(newDefaults) {
-           module.exports.defaults = newDefaults;
-         }
 
-         module.exports = {
-           defaults: getDefaults(),
-           getDefaults: getDefaults,
-           changeDefaults: changeDefaults
-         };
-       });
+             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']
+              */
 
-       /**
-        * Helpers
-        */
-       var escapeTest = /[&<>"']/;
-       var escapeReplace = /[&<>"']/g;
-       var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
-       var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
-       var escapeReplacements = {
-         '&': '&amp;',
-         '<': '&lt;',
-         '>': '&gt;',
-         '"': '&quot;',
-         "'": '&#39;'
-       };
+             function split(string, separator, limit) {
+               if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {
+                 separator = limit = undefined$1;
+               }
 
-       var getEscapeReplacement = function getEscapeReplacement(ch) {
-         return escapeReplacements[ch];
-       };
+               limit = limit === undefined$1 ? MAX_ARRAY_LENGTH : limit >>> 0;
 
-       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);
-           }
-         }
+               if (!limit) {
+                 return [];
+               }
 
-         return html;
-       }
+               string = toString(string);
 
-       var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
+               if (string && (typeof separator == 'string' || separator != null && !isRegExp(separator))) {
+                 separator = baseToString(separator);
 
-       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 ':';
+                 if (!separator && hasUnicode(string)) {
+                   return castSlice(stringToArray(string), 0, limit);
+                 }
+               }
 
-           if (n.charAt(0) === '#') {
-             return n.charAt(1) === 'x' ? String.fromCharCode(parseInt(n.substring(2), 16)) : String.fromCharCode(+n.substring(1));
-           }
+               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'
+              */
 
-           return '';
-         });
-       }
 
-       var caret = /(^|[^\[])\^/g;
+             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 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;
-       }
+             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 + '\
+              *   };\
+              * ');
+              */
 
-       var nonWordAndColonTest = /[^\w:]/g;
-       var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
 
-       function cleanUrl(sanitize, base, href) {
-         if (sanitize) {
-           var prot;
+             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;
 
-           try {
-             prot = decodeURIComponent(unescape$1(href)).replace(nonWordAndColonTest, '').toLowerCase();
-           } catch (e) {
-             return null;
-           }
+               if (guard && isIterateeCall(string, options, guard)) {
+                 options = undefined$1;
+               }
 
-           if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
-             return null;
-           }
-         }
+               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.
 
-         if (base && !originIndependentUrl.test(href)) {
-           href = resolveUrl(base, href);
-         }
+               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.
 
-         try {
-           href = encodeURI(href).replace(/%25/g, '%');
-         } catch (e) {
-           return null;
-         }
+               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.
 
-         return href;
-       }
+                 source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar); // Replace delimiters with snippets.
 
-       var baseUrls = {};
-       var justDomain = /^[^:]+:\/*[^/]*$/;
-       var protocol = /^([^:]+:)[\s\S]*$/;
-       var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
+                 if (escapeValue) {
+                   isEscaping = true;
+                   source += "' +\n__e(" + escapeValue + ") +\n'";
+                 }
 
-       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);
-           }
-         }
+                 if (evaluateValue) {
+                   isEvaluating = true;
+                   source += "';\n" + evaluateValue + ";\n__p += '";
+                 }
 
-         base = baseUrls[' ' + base];
-         var relativeBase = base.indexOf(':') === -1;
+                 if (interpolateValue) {
+                   source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
+                 }
 
-         if (href.substring(0, 2) === '//') {
-           if (relativeBase) {
-             return href;
-           }
+                 index = offset + match.length; // The JS engine embedded in Adobe products needs `match` returned in
+                 // order to produce the correct `offset` value.
 
-           return base.replace(protocol, '$1') + href;
-         } else if (href.charAt(0) === '/') {
-           if (relativeBase) {
-             return href;
-           }
+                 return match;
+               });
+               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.
 
-           return base.replace(domain, '$1') + href;
-         } else {
-           return base + href;
-         }
-       }
+               var variable = hasOwnProperty.call(options, 'variable') && options.variable;
 
-       var noopTest = {
-         exec: function noopTest() {}
-       };
+               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.
 
-       function merge$1(obj) {
-         var i = 1,
-             target,
-             key;
 
-         for (; i < arguments.length; i++) {
-           target = arguments[i];
+               source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source).replace(reEmptyStringMiddle, '$1').replace(reEmptyStringTrailing, '$1;'); // Frame code as the function body.
 
-           for (key in target) {
-             if (Object.prototype.hasOwnProperty.call(target, key)) {
-               obj[key] = target[key];
+               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.
+
+               result.source = source;
+
+               if (isError(result)) {
+                 throw result;
+               }
+
+               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__'
+              */
 
-         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 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__'
+              */
 
-           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 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']
+              */
 
-         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 trim(string, chars, guard) {
+               string = toString(string);
 
-         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.
+               if (string && (guard || chars === undefined$1)) {
+                 return baseTrim(string);
+               }
 
+               if (!string || !(chars = baseToString(chars))) {
+                 return string;
+               }
 
-       function rtrim$1(str, c, invert) {
-         var l = str.length;
+               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'
+              */
 
-         if (l === 0) {
-           return '';
-         } // Length of suffix matching the invert condition.
 
+             function trimEnd(string, chars, guard) {
+               string = toString(string);
 
-         var suffLen = 0; // Step left until we fail to match the invert condition.
+               if (string && (guard || chars === undefined$1)) {
+                 return string.slice(0, trimmedEndIndex(string) + 1);
+               }
 
-         while (suffLen < l) {
-           var currChar = str.charAt(l - suffLen - 1);
+               if (!string || !(chars = baseToString(chars))) {
+                 return string;
+               }
 
-           if (currChar === c && !invert) {
-             suffLen++;
-           } else if (currChar !== c && invert) {
-             suffLen++;
-           } else {
-             break;
-           }
-         }
+               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-_-'
+              */
 
-         return str.substr(0, l - suffLen);
-       }
 
-       function findClosingBracket(str, b) {
-         if (str.indexOf(b[1]) === -1) {
-           return -1;
-         }
+             function trimStart(string, chars, guard) {
+               string = toString(string);
 
-         var l = str.length;
-         var level = 0,
-             i = 0;
+               if (string && (guard || chars === undefined$1)) {
+                 return string.replace(reTrimStart, '');
+               }
 
-         for (; i < l; i++) {
-           if (str[i] === '\\') {
-             i++;
-           } else if (str[i] === b[0]) {
-             level++;
-           } else if (str[i] === b[1]) {
-             level--;
+               if (!string || !(chars = baseToString(chars))) {
+                 return string;
+               }
 
-             if (level < 0) {
-               return i;
+               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 [...]'
+              */
 
-         return -1;
-       }
 
-       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
+             function truncate(string, options) {
+               var length = DEFAULT_TRUNC_LENGTH,
+                   omission = DEFAULT_TRUNC_OMISSION;
 
+               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;
+               }
 
-       function repeatString(pattern, count) {
-         if (count < 1) {
-           return '';
-         }
+               string = toString(string);
+               var strLength = string.length;
 
-         var result = '';
+               if (hasUnicode(string)) {
+                 var strSymbols = stringToArray(string);
+                 strLength = strSymbols.length;
+               }
 
-         while (count > 1) {
-           if (count & 1) {
-             result += pattern;
-           }
+               if (length >= strLength) {
+                 return string;
+               }
 
-           count >>= 1;
-           pattern += pattern;
-         }
+               var end = length - stringSize(omission);
 
-         return result + pattern;
-       }
+               if (end < 1) {
+                 return omission;
+               }
 
-       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
-       };
+               var result = strSymbols ? castSlice(strSymbols, 0, end).join('') : string.slice(0, end);
 
-       var defaults$1 = defaults.defaults;
-       var rtrim$2 = helpers.rtrim,
-           splitCells$1 = helpers.splitCells,
-           _escape = helpers.escape,
-           findClosingBracket$1 = helpers.findClosingBracket;
+               if (separator === undefined$1) {
+                 return result + omission;
+               }
 
-       function outputLink(cap, link, raw) {
-         var href = link.href;
-         var title = link.title ? _escape(link.title) : null;
-         var text = cap[1].replace(/\\([\[\]])/g, '$1');
+               if (strSymbols) {
+                 end += result.length - end;
+               }
 
-         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)
-           };
-         }
-       }
+               if (isRegExp(separator)) {
+                 if (string.slice(end).search(separator)) {
+                   var match,
+                       substring = result;
 
-       function indentCodeCompensation(raw, text) {
-         var matchIndentToCode = raw.match(/^(\s+)(?:```)/);
+                   if (!separator.global) {
+                     separator = RegExp(separator.source, toString(reFlags.exec(separator)) + 'g');
+                   }
 
-         if (matchIndentToCode === null) {
-           return text;
-         }
+                   separator.lastIndex = 0;
 
-         var indentToCode = matchIndentToCode[1];
-         return text.split('\n').map(function (node) {
-           var matchIndentInNode = node.match(/^\s+/);
+                   while (match = separator.exec(substring)) {
+                     var newEnd = match.index;
+                   }
 
-           if (matchIndentInNode === null) {
-             return node;
-           }
+                   result = result.slice(0, newEnd === undefined$1 ? end : newEnd);
+                 }
+               } else if (string.indexOf(baseToString(separator), end) != end) {
+                 var index = result.lastIndexOf(separator);
 
-           var _matchIndentInNode = _slicedToArray(matchIndentInNode, 1),
-               indentInNode = _matchIndentInNode[0];
+                 if (index > -1) {
+                   result = result.slice(0, index);
+                 }
+               }
 
-           if (indentInNode.length >= indentToCode.length) {
-             return node.slice(indentToCode.length);
-           }
+               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'
+              */
 
-           return node;
-         }).join('\n');
-       }
-       /**
-        * Tokenizer
-        */
 
+             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 Tokenizer_1 = /*#__PURE__*/function () {
-         function Tokenizer(options) {
-           _classCallCheck(this, Tokenizer);
 
-           this.options = options || defaults$1;
-         }
+             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'
+              */
 
-         _createClass(Tokenizer, [{
-           key: "space",
-           value: function space(src) {
-             var cap = this.rules.block.newline.exec(src);
+             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']
+              */
 
-             if (cap) {
-               if (cap[0].length > 1) {
-                 return {
-                   type: 'space',
-                   raw: cap[0]
-                 };
+             function words(string, pattern, guard) {
+               string = toString(string);
+               pattern = guard ? undefined$1 : pattern;
+
+               if (pattern === undefined$1) {
+                 return hasUnicodeWord(string) ? unicodeWords(string) : asciiWords(string);
                }
 
-               return {
-                 raw: '\n'
-               };
+               return string.match(pattern) || [];
              }
-           }
-         }, {
-           key: "code",
-           value: function code(src, tokens) {
-             var cap = this.rules.block.code.exec(src);
+             /*------------------------------------------------------------------------*/
 
-             if (cap) {
-               var lastToken = tokens[tokens.length - 1]; // An indented code block cannot interrupt a paragraph.
+             /**
+              * 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 = [];
+              * }
+              */
 
-               if (lastToken && lastToken.type === 'paragraph') {
-                 return {
-                   raw: cap[0],
-                   text: cap[0].trimRight()
-                 };
+
+             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.
+              */
 
-               var text = cap[0].replace(/^ {1,4}/gm, '');
-               return {
-                 type: 'code',
-                 raw: cap[0],
-                 codeBlockStyle: 'indented',
-                 text: !this.options.pedantic ? rtrim$2(text, '\n') : text
-               };
+             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'
+              */
+
+             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);
+                 }
+
+                 return [toIteratee(pair[0]), pair[1]];
+               });
+               return baseRest(function (args) {
+                 var index = -1;
+
+                 while (++index < length) {
+                   var pair = pairs[index];
+
+                   if (apply(pair[0], this, args)) {
+                     return apply(pair[1], this, args);
+                   }
+                 }
+               });
              }
-           }
-         }, {
-           key: "fences",
-           value: function fences(src) {
-             var cap = this.rules.block.fences.exec(src);
+             /**
+              * 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 }]
+              */
 
-             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
+
+             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
+              */
+
+
+             function constant(value) {
+               return function () {
+                 return value;
                };
              }
-           }
-         }, {
-           key: "heading",
-           value: function heading(src) {
-             var cap = this.rules.block.heading.exec(src);
+             /**
+              * 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
+              */
 
-             if (cap) {
-               var text = cap[2].trim(); // remove trailing #s
 
-               if (/#$/.test(text)) {
-                 var trimmed = rtrim$2(text, '#');
+             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
+              */
 
-                 if (this.options.pedantic) {
-                   text = trimmed.trim();
-                 } else if (!trimmed || / $/.test(trimmed)) {
-                   // CommonMark requires space before trailing #s
-                   text = trimmed.trim();
-                 }
-               }
 
-               return {
-                 type: 'heading',
-                 raw: cap[0],
-                 depth: cap[1].length,
-                 text: text
-               };
+             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;
              }
-           }
-         }, {
-           key: "nptable",
-           value: function nptable(src) {
-             var cap = this.rules.block.nptable.exec(src);
+             /**
+              * 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]
+              */
 
-             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]
+             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']
+              */
 
-               if (item.header.length === item.align.length) {
-                 var l = item.align.length;
-                 var i;
+             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;
+                     }
 
-                 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;
-                   }
+                     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();
+              */
 
-                 l = item.cells.length;
-
-                 for (i = 0; i < l; i++) {
-                   item.cells[i] = splitCells$1(item.cells[i], item.header.length);
-                 }
 
-                 return item;
+             function noConflict() {
+               if (root._ === this) {
+                 root._ = oldDash;
                }
-             }
-           }
-         }, {
-           key: "hr",
-           value: function hr(src) {
-             var cap = this.rules.block.hr.exec(src);
 
-             if (cap) {
-               return {
-                 type: 'hr',
-                 raw: cap[0]
-               };
+               return this;
              }
-           }
-         }, {
-           key: "blockquote",
-           value: function blockquote(src) {
-             var cap = this.rules.block.blockquote.exec(src);
+             /**
+              * This method returns `undefined`.
+              *
+              * @static
+              * @memberOf _
+              * @since 2.3.0
+              * @category Util
+              * @example
+              *
+              * _.times(2, _.noop);
+              * // => [undefined, undefined]
+              */
 
-             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);
 
-             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 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'
+              */
 
-               var itemMatch = cap[0].match(this.rules.block.item);
-               var next = false,
-                   item,
-                   space,
-                   bcurr,
-                   bnext,
-                   addBack,
-                   loose,
-                   istask,
-                   ischecked;
-               var l = itemMatch.length;
-               bcurr = this.rules.block.listItemStart.exec(itemMatch[0]);
 
-               for (var i = 0; i < l; i++) {
-                 item = itemMatch[i];
-                 raw = item; // Determine whether the next list item belongs here.
-                 // Backpedal if it does not belong in this list.
+             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]
+              */
 
-                 if (i !== l - 1) {
-                   bnext = this.rules.block.listItemStart.exec(itemMatch[i + 1]);
 
-                   if (!this.options.pedantic ? bnext[1].length > bcurr[0].length || bnext[1].length > 3 : bnext[1].length > bcurr[1].length) {
-                     // nested list
-                     itemMatch.splice(i, 2, itemMatch[i] + '\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');
-                       list.raw = list.raw.substring(0, list.raw.length - addBack.length);
-                       i = l - 1;
-                     }
-                   }
+             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
+              */
 
-                   bcurr = bnext;
-                 } // Remove the list item's bullet
-                 // so it is seen as the next token.
+             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]])
+              */
 
+             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]
+              */
 
-                 space = item.length;
-                 item = item.replace(/^ *([*+-]|\d+[.)]) ?/, ''); // Outdent whatever the
-                 // list item contains. Hacky.
+             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]
+              */
 
-                 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 item is loose or not.
-                 // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
-                 // for discount behavior.
 
+             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);
+              * // => []
+              */
 
-                 loose = next || /\n\n(?!\s*$)/.test(item);
 
-                 if (i !== l - 1) {
-                   next = item.charAt(item.length - 1) === '\n';
-                   if (!loose) loose = next;
-                 }
+             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);
+              * // => []
+              */
 
-                 if (loose) {
-                   list.loose = true;
-                 } // Check for task list items
+             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
+              */
 
+             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]
+              */
 
-                 if (this.options.gfm) {
-                   istask = /^\[[ xX]\] /.test(item);
-                   ischecked = undefined;
 
-                   if (istask) {
-                     ischecked = item[1] !== ' ';
-                     item = item.replace(/^\[[ xX]\] +/, '');
-                   }
-                 }
+             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
+              */
 
-                 list.items.push({
-                   type: 'list_item',
-                   raw: raw,
-                   task: istask,
-                   checked: ischecked,
-                   loose: loose,
-                   text: item
-                 });
-               }
 
-               return list;
+             function stubObject() {
+               return {};
              }
-           }
-         }, {
-           key: "html",
-           value: function html(src) {
-             var cap = this.rules.block.html.exec(src);
+             /**
+              * 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 (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 {
-                 tag: tag,
-                 raw: cap[0],
-                 href: cap[2],
-                 title: cap[3]
-               };
+             function stubString() {
+               return '';
              }
-           }
-         }, {
-           key: "table",
-           value: function table(src) {
-             var cap = this.rules.block.table.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') : []
-               };
+             /**
+              * This method returns `true`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.13.0
+              * @category Util
+              * @returns {boolean} Returns `true`.
+              * @example
+              *
+              * _.times(2, _.stubTrue);
+              * // => [true, true]
+              */
 
-               if (item.header.length === item.align.length) {
-                 item.raw = cap[0];
-                 var l = item.align.length;
-                 var i;
 
-                 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 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]
+              */
 
-                 l = item.cells.length;
 
-                 for (i = 0; i < l; i++) {
-                   item.cells[i] = splitCells$1(item.cells[i].replace(/^ *\| *| *\| *$/g, ''), item.header.length);
-                 }
+             function times(n, iteratee) {
+               n = toInteger(n);
 
-                 return item;
+               if (n < 1 || n > MAX_SAFE_INTEGER) {
+                 return [];
                }
-             }
-           }
-         }, {
-           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);
+               var index = MAX_ARRAY_LENGTH,
+                   length = nativeMin(n, MAX_ARRAY_LENGTH);
+               iteratee = getIteratee(iteratee);
+               n -= MAX_ARRAY_LENGTH;
+               var result = baseTimes(length, iteratee);
 
-             if (cap) {
-               return {
-                 type: 'paragraph',
-                 raw: cap[0],
-                 text: cap[1].charAt(cap[1].length - 1) === '\n' ? cap[1].slice(0, -1) : cap[1]
-               };
+               while (++index < n) {
+                 iteratee(index);
+               }
+
+               return result;
              }
-           }
-         }, {
-           key: "text",
-           value: function text(src, tokens) {
-             var cap = this.rules.block.text.exec(src);
+             /**
+              * 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']
+              */
 
-             if (cap) {
-               var lastToken = tokens[tokens.length - 1];
 
-               if (lastToken && lastToken.type === 'text') {
-                 return {
-                   raw: cap[0],
-                   text: cap[0]
-                 };
+             function toPath(value) {
+               if (isArray(value)) {
+                 return arrayMap(value, toKey);
                }
 
-               return {
-                 type: 'text',
-                 raw: cap[0],
-                 text: cap[0]
-               };
+               return isSymbol(value) ? [value] : copyArray(stringToPath(toString(value)));
              }
-           }
-         }, {
-           key: "escape",
-           value: function escape(src) {
-             var cap = this.rules.inline.escape.exec(src);
+             /**
+              * 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'
+              */
 
-             if (cap) {
-               return {
-                 type: 'escape',
-                 raw: cap[0],
-                 text: _escape(cap[1])
-               };
+
+             function uniqueId(prefix) {
+               var id = ++idCounter;
+               return toString(prefix) + id;
              }
-           }
-         }, {
-           key: "tag",
-           value: function tag(src, inLink, inRawBlock) {
-             var cap = this.rules.inline.tag.exec(src);
+             /*------------------------------------------------------------------------*/
 
-             if (cap) {
-               if (!inLink && /^<a /i.test(cap[0])) {
-                 inLink = true;
-               } else if (inLink && /^<\/a>/i.test(cap[0])) {
-                 inLink = false;
-               }
+             /**
+              * 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
+              */
 
-               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;
-               }
 
-               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]
-               };
+             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
+              */
+
+             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 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
+              */
+
+             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
+              */
+
+             function max(array) {
+               return array && array.length ? baseExtremum(array, identity, baseGt) : undefined$1;
              }
-           }
-         }, {
-           key: "link",
-           value: function link(src) {
-             var cap = this.rules.inline.link.exec(src);
+             /**
+              * 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 }
+              */
 
-             if (cap) {
-               var trimmedUrl = cap[2].trim();
 
-               if (!this.options.pedantic && /^</.test(trimmedUrl)) {
-                 // commonmark requires matching angle brackets
-                 if (!/>$/.test(trimmedUrl)) {
-                   return;
-                 } // ending angle bracket cannot be escaped
+             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
+              */
+
+
+             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
+              */
 
 
-                 var rtrimSlash = rtrim$2(trimmedUrl.slice(0, -1), '\\');
+             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 ((trimmedUrl.length - rtrimSlash.length) % 2 === 0) {
-                   return;
-                 }
-               } else {
-                 // find closing parenthesis
-                 var lastParenIndex = findClosingBracket$1(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] = '';
-                 }
-               }
+             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 }
+              */
 
-               var href = cap[2];
-               var title = '';
 
-               if (this.options.pedantic) {
-                 // split pedantic href and title
-                 var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
+             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 (link) {
-                   href = link[1];
-                   title = link[3];
-                 }
-               } else {
-                 title = cap[3] ? cap[3].slice(1, -1) : '';
-               }
 
-               href = href.trim();
+             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
+              */
 
-               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);
-                 }
-               }
+             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
+              */
 
-               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]);
+             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
+              */
+
+             function sum(array) {
+               return array && array.length ? baseSum(array, identity) : 0;
              }
-           }
-         }, {
-           key: "reflink",
-           value: function reflink(src, links) {
-             var cap;
+             /**
+              * 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
+              */
 
-             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 (!link || !link.href) {
-                 var text = cap[0].charAt(0);
-                 return {
-                   type: 'text',
-                   raw: text,
-                   text: text
-                 };
-               }
+             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 outputLink(cap, link, cap[0]);
-             }
-           }
-         }, {
-           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);
+             /**
+              * The semantic version number.
+              *
+              * @static
+              * @memberOf _
+              * @type {string}
+              */
 
-             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;
+             lodash.VERSION = VERSION; // Assign default placeholders.
 
-               while ((match = endReg.exec(maskedSrc)) != null) {
-                 cap = this.rules.inline.strong.middle.exec(maskedSrc.slice(0, match.index + 3));
+             arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function (methodName) {
+               lodash[methodName].placeholder = lodash;
+             }); // Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
 
-                 if (cap) {
-                   return {
-                     type: 'strong',
-                     raw: src.slice(0, cap[0].length),
-                     text: src.slice(2, cap[0].length - 2)
-                   };
+             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 (result.__filtered__) {
+                   result.__takeCount__ = nativeMin(n, result.__takeCount__);
+                 } else {
+                   result.__views__.push({
+                     'size': nativeMin(n, MAX_ARRAY_LENGTH),
+                     'type': methodName + (result.__dir__ < 0 ? 'Right' : '')
+                   });
                  }
-               }
-             }
-           }
-         }, {
-           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;
+                 return result;
+               };
 
-               while ((match = endReg.exec(maskedSrc)) != null) {
-                 cap = this.rules.inline.em.middle.exec(maskedSrc.slice(0, match.index + 2));
+               LazyWrapper.prototype[methodName + 'Right'] = function (n) {
+                 return this.reverse()[methodName](n).reverse();
+               };
+             }); // Add `LazyWrapper` methods that accept an `iteratee` value.
 
-                 if (cap) {
-                   return {
-                     type: 'em',
-                     raw: src.slice(0, cap[0].length),
-                     text: src.slice(1, cap[0].length - 1)
-                   };
-                 }
-               }
-             }
-           }
-         }, {
-           key: "codespan",
-           value: function codespan(src) {
-             var cap = this.rules.inline.code.exec(src);
+             arrayEach(['filter', 'map', 'takeWhile'], function (methodName, index) {
+               var type = index + 1,
+                   isFilter = type == LAZY_FILTER_FLAG || type == LAZY_WHILE_FLAG;
 
-             if (cap) {
-               var text = cap[2].replace(/\n/g, ' ');
-               var hasNonSpaceChars = /[^ ]/.test(text);
-               var hasSpaceCharsOnBothEnds = /^ /.test(text) && / $/.test(text);
+               LazyWrapper.prototype[methodName] = function (iteratee) {
+                 var result = this.clone();
 
-               if (hasNonSpaceChars && hasSpaceCharsOnBothEnds) {
-                 text = text.substring(1, text.length - 1);
-               }
+                 result.__iteratees__.push({
+                   'iteratee': getIteratee(iteratee, 3),
+                   'type': type
+                 });
 
-               text = _escape(text, true);
-               return {
-                 type: 'codespan',
-                 raw: cap[0],
-                 text: text
+                 result.__filtered__ = result.__filtered__ || isFilter;
+                 return result;
                };
-             }
-           }
-         }, {
-           key: "br",
-           value: function br(src) {
-             var cap = this.rules.inline.br.exec(src);
+             }); // Add `LazyWrapper` methods for `_.head` and `_.last`.
 
-             if (cap) {
-               return {
-                 type: 'br',
-                 raw: cap[0]
+             arrayEach(['head', 'last'], function (methodName, index) {
+               var takeName = 'take' + (index ? 'Right' : '');
+
+               LazyWrapper.prototype[methodName] = function () {
+                 return this[takeName](1).value()[0];
                };
-             }
-           }
-         }, {
-           key: "del",
-           value: function del(src) {
-             var cap = this.rules.inline.del.exec(src);
+             }); // Add `LazyWrapper` methods for `_.initial` and `_.tail`.
 
-             if (cap) {
-               return {
-                 type: 'del',
-                 raw: cap[0],
-                 text: cap[2]
+             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: "autolink",
-           value: function autolink(src, mangle) {
-             var cap = this.rules.inline.autolink.exec(src);
+             });
 
-             if (cap) {
-               var text, href;
+             LazyWrapper.prototype.compact = function () {
+               return this.filter(identity);
+             };
 
-               if (cap[2] === '@') {
-                 text = _escape(this.options.mangle ? mangle(cap[1]) : cap[1]);
-                 href = 'mailto:' + text;
-               } else {
-                 text = _escape(cap[1]);
-                 href = text;
-               }
+             LazyWrapper.prototype.find = function (predicate) {
+               return this.filter(predicate).head();
+             };
 
-               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;
+             LazyWrapper.prototype.findLast = function (predicate) {
+               return this.reverse().find(predicate);
+             };
 
-             if (cap = this.rules.inline.url.exec(src)) {
-               var text, href;
+             LazyWrapper.prototype.invokeMap = baseRest(function (path, args) {
+               if (typeof path == 'function') {
+                 return new LazyWrapper(this);
+               }
 
-               if (cap[2] === '@') {
-                 text = _escape(this.options.mangle ? mangle(cap[0]) : cap[0]);
-                 href = 'mailto:' + text;
-               } else {
-                 // do extended autolink path validation
-                 var prevCapZero;
+               return this.map(function (value) {
+                 return baseInvoke(value, path, args);
+               });
+             });
 
-                 do {
-                   prevCapZero = cap[0];
-                   cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
-                 } while (prevCapZero !== cap[0]);
+             LazyWrapper.prototype.reject = function (predicate) {
+               return this.filter(negate(getIteratee(predicate)));
+             };
 
-                 text = _escape(cap[0]);
+             LazyWrapper.prototype.slice = function (start, end) {
+               start = toInteger(start);
+               var result = this;
 
-                 if (cap[1] === 'www.') {
-                   href = 'http://' + text;
-                 } else {
-                   href = text;
-                 }
+               if (result.__filtered__ && (start > 0 || end < 0)) {
+                 return new LazyWrapper(result);
                }
 
-               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);
-
-             if (cap) {
-               var text;
+               if (start < 0) {
+                 result = result.takeRight(-start);
+               } else if (start) {
+                 result = result.drop(start);
+               }
 
-               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]);
+               if (end !== undefined$1) {
+                 end = toInteger(end);
+                 result = end < 0 ? result.dropRight(-end) : result.take(end - start);
                }
 
-               return {
-                 type: 'text',
-                 raw: cap[0],
-                 text: text
-               };
-             }
-           }
-         }]);
+               return result;
+             };
 
-         return Tokenizer;
-       }();
+             LazyWrapper.prototype.takeRightWhile = function (predicate) {
+               return this.reverse().takeWhile(predicate).reverse();
+             };
 
-       var noopTest$1 = helpers.noopTest,
-           edit$1 = helpers.edit,
-           merge$2 = helpers.merge;
-       /**
-        * Block-Level Grammar
-        */
+             LazyWrapper.prototype.toArray = function () {
+               return this.take(MAX_ARRAY_LENGTH);
+             }; // Add `LazyWrapper` methods to `lodash.prototype`.
 
-       var block = {
-         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{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)[^\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(?! *bull ?)[^\n]*)*/;
-       block.item = edit$1(block.item, 'gm').replace(/bull/g, block.bullet).getRegex();
-       block.listItemStart = edit$1(/^( *)(bull)/).replace('bull', 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
-        */
 
-       block.normal = merge$2({}, block);
-       /**
-        * GFM Block Grammar
-        */
+             baseForOwn(LazyWrapper.prototype, function (func, methodName) {
+               var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),
+                   isTaker = /^(?:head|last)$/.test(methodName),
+                   lodashFunc = lodash[isTaker ? 'take' + (methodName == 'last' ? 'Right' : '') : methodName],
+                   retUnwrapped = isTaker || /^find/.test(methodName);
 
-       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
+               if (!lodashFunc) {
+                 return;
+               }
 
-       });
-       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)
-        */
+               lodash.prototype[methodName] = function () {
+                 var value = this.__wrapped__,
+                     args = isTaker ? [1] : arguments,
+                     isLazy = value instanceof LazyWrapper,
+                     iteratee = args[0],
+                     useLazy = isLazy || isArray(value);
 
-       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+|$)/,
-         heading: /^(#{1,6})(.*)(?:\n+|$)/,
-         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 interceptor = function interceptor(value) {
+                   var result = lodashFunc.apply(lodash, arrayPush([value], args));
+                   return isTaker && chainAll ? result[0] : result;
+                 };
 
-       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 (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
+                   // Avoid lazy use if the iteratee has a "length" value other than `1`.
+                   isLazy = useLazy = false;
+                 }
 
-         },
-         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)
+                 var chainAll = this.__chain__,
+                     isHybrid = !!this.__actions__.length,
+                     isUnwrapped = retUnwrapped && !chainAll,
+                     onlyLazy = isLazy && !isHybrid;
 
-         },
-         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 = /<(?:\\.|[^\n<>\\])+>|[^\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 (!retUnwrapped && useLazy) {
+                   value = onlyLazy ? value : new LazyWrapper(this);
+                   var result = func.apply(value, args);
 
-       inline.normal = merge$2({}, inline);
-       /**
-        * Pedantic Inline Grammar
-        */
+                   result.__actions__.push({
+                     'func': thru,
+                     'args': [interceptor],
+                     'thisArg': undefined$1
+                   });
 
-       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
-        */
+                   return new LodashWrapper(result, chainAll);
+                 }
 
-       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~])\1(?=[^~]|$)/,
-         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
-        */
+                 if (isUnwrapped && onlyLazy) {
+                   return func.apply(this, args);
+                 }
 
-       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
-       };
+                 result = this.thru(interceptor);
+                 return isUnwrapped ? isTaker ? result.value()[0] : result.value() : result;
+               };
+             }); // Add `Array` methods to `lodash.prototype`.
 
-       var defaults$2 = defaults.defaults;
-       var block$1 = rules.block,
-           inline$1 = rules.inline;
-       var repeatString$1 = helpers.repeatString;
-       /**
-        * smartypants text replacement
-        */
+             arrayEach(['pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function (methodName) {
+               var func = arrayProto[methodName],
+                   chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
+                   retUnwrapped = /^(?:pop|shift)$/.test(methodName);
 
-       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
-        */
+               lodash.prototype[methodName] = function () {
+                 var args = arguments;
 
+                 if (retUnwrapped && !this.__chain__) {
+                   var value = this.value();
+                   return func.apply(isArray(value) ? value : [], args);
+                 }
 
-       function mangle(text) {
-         var out = '',
-             i,
-             ch;
-         var l = text.length;
+                 return this[chainName](function (value) {
+                   return func.apply(isArray(value) ? value : [], args);
+                 });
+               };
+             }); // Map minified method names to their real names.
 
-         for (i = 0; i < l; i++) {
-           ch = text.charCodeAt(i);
+             baseForOwn(LazyWrapper.prototype, function (func, methodName) {
+               var lodashFunc = lodash[methodName];
 
-           if (Math.random() > 0.5) {
-             ch = 'x' + ch.toString(16);
-           }
+               if (lodashFunc) {
+                 var key = lodashFunc.name + '';
 
-           out += '&#' + ch + ';';
-         }
+                 if (!hasOwnProperty.call(realNames, key)) {
+                   realNames[key] = [];
+                 }
 
-         return out;
-       }
-       /**
-        * Block Lexer
-        */
+                 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`.
 
+             LazyWrapper.prototype.clone = lazyClone;
+             LazyWrapper.prototype.reverse = lazyReverse;
+             LazyWrapper.prototype.value = lazyValue; // Add chain sequence methods to the `lodash` wrapper.
 
-       var Lexer_1 = /*#__PURE__*/function () {
-         function Lexer(options) {
-           _classCallCheck(this, Lexer);
+             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.
 
-           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
+             lodash.prototype.first = lodash.prototype.head;
+
+             if (symIterator) {
+               lodash.prototype[symIterator] = wrapperToIterator;
+             }
+
+             return lodash;
            };
+           /*--------------------------------------------------------------------------*/
+           // Export lodash.
 
-           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 (this.options.breaks) {
-               rules.inline = inline$1.breaks;
-             } else {
-               rules.inline = inline$1.gfm;
-             }
+           var _ = runInContext(); // Some AMD build optimizers, like r.js, check for condition patterns like:
+
+
+           if (freeModule) {
+             // Export for Node.js.
+             (freeModule.exports = _)._ = _; // Export for CommonJS support.
+
+             freeExports._ = _;
+           } else {
+             // Export to the global object.
+             root._ = _;
            }
+         }).call(commonjsGlobal);
+       })(lodash, lodash.exports);
 
-           this.tokenizer.rules = rules;
+       function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
+         discardTags = discardTags || {};
+         var _option = 'safe'; // 'safe', 'force_local', 'force_remote'
+
+         var _conflicts = [];
+
+         function user(d) {
+           return typeof formatUser === 'function' ? formatUser(d) : lodash.exports.escape(d);
          }
-         /**
-          * Expose Rules
-          */
 
+         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;
+           }
 
-         _createClass(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;
+           if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
+             return target;
            }
-           /**
-            * 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;
+           if (_option === 'force_remote') {
+             return target.update({
+               loc: remote.loc
+             });
+           }
 
-             if (this.options.pedantic) {
-               src = src.replace(/^ +$/gm, '');
+           _conflicts.push(_t.html('merge_remote_changes.conflict.location', {
+             user: {
+               html: user(remote.user)
              }
+           }));
 
-             var token, i, l, lastToken;
-
-             while (src) {
-               // newline
-               if (token = this.tokenizer.space(src)) {
-                 src = src.substring(token.raw.length);
-
-                 if (token.type) {
-                   tokens.push(token);
-                 }
+           return target;
+         }
 
-                 continue;
-               } // code
+         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
+             });
+           }
 
-               if (token = this.tokenizer.code(src, tokens)) {
-                 src = src.substring(token.raw.length);
+           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 (token.type) {
-                   tokens.push(token);
-                 } else {
-                   lastToken = tokens[tokens.length - 1];
-                   lastToken.raw += '\n' + token.raw;
-                   lastToken.text += '\n' + token.text;
-                 }
+           for (var i = 0; i < hunks.length; i++) {
+             var hunk = hunks[i];
 
-                 continue;
-               } // fences
+             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)
+                   }
+                 }));
 
-               if (token = this.tokenizer.fences(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // heading
+                 break;
+               }
+             }
+           }
 
+           return _conflicts.length === ccount ? target.update({
+             nodes: nodes
+           }) : target;
+         }
 
-               if (token = this.tokenizer.heading(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // table no leading pipe (gfm)
+         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;
 
-               if (token = this.tokenizer.nptable(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // hr
+           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);
+               }
 
-               if (token = this.tokenizer.hr(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // blockquote
+               continue;
+             } // restore used childNodes..
 
 
-               if (token = this.tokenizer.blockquote(src)) {
-                 src = src.substring(token.raw.length);
-                 token.tokens = this.blockTokens(token.text, [], top);
-                 tokens.push(token);
-                 continue;
-               } // list
+             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 (token = this.tokenizer.list(src)) {
-                 src = src.substring(token.raw.length);
-                 l = token.items.length;
+               if (remote) {
+                 target = target.update({
+                   version: remote.version
+                 });
+               }
 
-                 for (i = 0; i < l; i++) {
-                   token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
-                 }
+               updates.replacements.push(target);
+             } else if (_option === 'safe' && local && remote && local.version !== remote.version) {
+               target = osmEntity(local, {
+                 version: remote.version
+               });
 
-                 tokens.push(token);
-                 continue;
-               } // html
+               if (remote.visible) {
+                 target = mergeLocation(remote, target);
+               } else {
+                 _conflicts.push(_t.html('merge_remote_changes.conflict.deleted', {
+                   user: {
+                     html: user(remote.user)
+                   }
+                 }));
+               }
 
+               if (_conflicts.length !== ccount) break;
+               updates.replacements.push(target);
+             }
+           }
 
-               if (token = this.tokenizer.html(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // def
+           return targetWay;
+         }
 
+         function updateChildren(updates, graph) {
+           for (var i = 0; i < updates.replacements.length; i++) {
+             graph = graph.replace(updates.replacements[i]);
+           }
 
-               if (top && (token = this.tokenizer.def(src))) {
-                 src = src.substring(token.raw.length);
+           if (updates.removeIds.length) {
+             graph = actionDeleteMultiple(updates.removeIds)(graph);
+           }
 
-                 if (!this.tokens.links[token.tag]) {
-                   this.tokens.links[token.tag] = {
-                     href: token.href,
-                     title: token.title
-                   };
-                 }
+           return graph;
+         }
 
-                 continue;
-               } // table (gfm)
+         function mergeMembers(remote, target) {
+           if (_option === 'force_local' || fastDeepEqual(target.members, remote.members)) {
+             return target;
+           }
 
+           if (_option === 'force_remote') {
+             return target.update({
+               members: remote.members
+             });
+           }
 
-               if (token = this.tokenizer.table(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // lheading
+           _conflicts.push(_t.html('merge_remote_changes.conflict.memberlist', {
+             user: {
+               html: user(remote.user)
+             }
+           }));
 
+           return target;
+         }
 
-               if (token = this.tokenizer.lheading(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // top-level paragraph
+         function mergeTags(base, remote, target) {
+           if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
+             return target;
+           }
 
+           if (_option === 'force_remote') {
+             return target.update({
+               tags: remote.tags
+             });
+           }
 
-               if (top && (token = this.tokenizer.paragraph(src))) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // text
+           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;
 
-               if (token = this.tokenizer.text(src, tokens)) {
-                 src = src.substring(token.raw.length);
+           for (var i = 0; i < keys.length; i++) {
+             var k = keys[i];
 
-                 if (token.type) {
-                   tokens.push(token);
+             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 {
+                 // unchanged locally, accept remote change..
+                 if (b.hasOwnProperty(k)) {
+                   tags[k] = b[k];
                  } else {
-                   lastToken = tokens[tokens.length - 1];
-                   lastToken.raw += '\n' + token.raw;
-                   lastToken.text += '\n' + token.text;
+                   delete tags[k];
                  }
 
-                 continue;
+                 changed = true;
                }
+             }
+           }
 
-               if (src) {
-                 var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
+           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`
+         //
 
-                 if (this.options.silent) {
-                   console.error(errMsg);
-                   break;
-                 } else {
-                   throw new Error(errMsg);
-                 }
+
+         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 (!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);
                }
+
+               return graph.replace(target);
+             } else {
+               _conflicts.push(_t.html('merge_remote_changes.conflict.deleted', {
+                 user: {
+                   html: user(remote.user)
+                 }
+               }));
+
+               return graph; // do nothing
              }
+           } // merge
 
-             return tokens;
-           }
-         }, {
-           key: "inline",
-           value: function inline(tokens) {
-             var i, j, k, l2, row, token;
-             var l = tokens.length;
 
-             for (i = 0; i < l; i++) {
-               token = tokens[i];
+           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);
+           }
 
-               switch (token.type) {
-                 case 'paragraph':
-                 case 'text':
-                 case 'heading':
-                   {
-                     token.tokens = [];
-                     this.inlineTokens(token.text, token.tokens);
-                     break;
-                   }
+           target = mergeTags(base, remote, target);
 
-                 case 'table':
-                   {
-                     token.tokens = {
-                       header: [],
-                       cells: []
-                     }; // header
+           if (!_conflicts.length) {
+             graph = updateChildren(updates, graph).replace(target);
+           }
 
-                     l2 = token.header.length;
+           return graph;
+         };
 
-                     for (j = 0; j < l2; j++) {
-                       token.tokens.header[j] = [];
-                       this.inlineTokens(token.header[j], token.tokens.header[j]);
-                     } // cells
+         action.withOption = function (opt) {
+           _option = opt;
+           return action;
+         };
 
+         action.conflicts = function () {
+           return _conflicts;
+         };
 
-                     l2 = token.cells.length;
+         return action;
+       }
 
-                     for (j = 0; j < l2; j++) {
-                       row = token.cells[j];
-                       token.tokens.cells[j] = [];
+       // https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as
 
-                       for (k = 0; k < row.length; k++) {
-                         token.tokens.cells[j][k] = [];
-                         this.inlineTokens(row[k], token.tokens.cells[j][k]);
-                       }
-                     }
+       function actionMove(moveIDs, tryDelta, projection, cache) {
+         var _delta = tryDelta;
 
-                     break;
-                   }
+         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..
 
-                 case 'blockquote':
-                   {
-                     this.inline(token.tokens);
-                     break;
-                   }
+             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..
 
-                 case 'list':
-                   {
-                     l2 = token.items.length;
+             var parentsMoving = parents.every(function (way) {
+               return cache.moving[way.id];
+             });
+             if (!parentsMoving) delete cache.moving[nodeID];
+             return parentsMoving;
+           }
 
-                     for (j = 0; j < l2; j++) {
-                       this.inline(token.items[j].tokens);
-                     }
+           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;
 
-                     break;
-                   }
+               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;
+                 }));
                }
              }
-
-             return tokens;
            }
-           /**
-            * Lexing/Compiling
-            */
 
-         }, {
-           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; // String with links masked to avoid interference with em and strong
+           function cacheIntersections(ids) {
+             function isEndpoint(way, id) {
+               return !way.isClosed() && !!way.affix(id);
+             }
 
-             var maskedSrc = src;
-             var match;
-             var keepPrevChar, prevChar; // Mask out reflinks
+             for (var i = 0; i < ids.length; i++) {
+               var id = ids[i]; // consider only intersections with 1 moved and 1 unmoved way.
 
-             if (this.tokens.links) {
-               var links = Object.keys(this.tokens.links);
+               var childNodes = graph.childNodes(graph.entity(id));
 
-               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);
+               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;
+
+                 for (var k = 0; k < parents.length; k++) {
+                   var way = parents[k];
+
+                   if (!cache.moving[way.id]) {
+                     unmoved = way;
+                     break;
                    }
                  }
-               }
-             } // Mask out other blocks
-
 
-             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 (!unmoved) continue; // exclude ways that are overly connected..
 
-             while (src) {
-               if (!keepPrevChar) {
-                 prevChar = '';
+                 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)
+                 });
                }
+             }
+           }
 
-               keepPrevChar = false; // escape
-
-               if (token = this.tokenizer.escape(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // tag
-
-
-               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 (token = this.tokenizer.link(src)) {
-                 src = src.substring(token.raw.length);
+           if (!cache) {
+             cache = {};
+           }
 
-                 if (token.type === 'link') {
-                   token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
-                 }
+           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
+         //
+         //
 
-                 tokens.push(token);
-                 continue;
-               } // reflink, nolink
 
+         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 (token = this.tokenizer.reflink(src, this.tokens.links)) {
-                 src = src.substring(token.raw.length);
+           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 (token.type === 'link') {
-                   token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
-                 }
+           var prev = graph.hasEntity(way.nodes[prevIndex]);
+           var next = graph.hasEntity(way.nodes[nextIndex]); // Don't add orig vertex at endpoint..
 
-                 tokens.push(token);
-                 continue;
-               } // strong
+           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];
+           }
 
-               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
+           var start, end;
 
+           if (delta) {
+             start = projection(cache.startLoc[nodeId]);
+             end = projection.invert(geoVecAdd(start, delta));
+           } else {
+             end = cache.startLoc[nodeId];
+           }
 
-               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
+           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.codespan(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // br
+           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.
 
-               if (token = this.tokenizer.br(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // del (gfm)
 
+         function removeDuplicateVertices(wayId, graph) {
+           var way = graph.entity(wayId);
+           var epsilon = 1e-6;
+           var prev, curr;
 
-               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
+           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.autolink(src, mangle)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // url (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 (!inLink && (token = this.tokenizer.url(src, mangle))) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // text
+           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.inlineText(src, inRawBlock, smartypants)) {
-                 src = src.substring(token.raw.length);
-                 prevChar = token.raw.slice(-1);
-                 keepPrevChar = true;
-                 tokens.push(token);
-                 continue;
-               }
+         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 (src) {
-                 var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
+           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 (this.options.silent) {
-                   console.error(errMsg);
-                   break;
-                 } else {
-                   throw new Error(errMsg);
-                 }
-               }
-             }
+           if (!isEP1 && !isEP2) {
+             var epsilon = 1e-6,
+                 maxIter = 10;
 
-             return tokens;
-           }
-         }], [{
-           key: "rules",
-           get: function get() {
-             return {
-               block: block$1,
-               inline: inline$1
-             };
+             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;
            }
-           /**
-            * Static Lex Method
-            */
 
-         }, {
-           key: "lex",
-           value: function lex(src, options) {
-             var lexer = new Lexer(options);
-             return lexer.lex(src);
+           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);
            }
-           /**
-            * Static Lex Inline Method
-            */
 
-         }, {
-           key: "lexInline",
-           value: function lexInline(src, options) {
-             var lexer = new Lexer(options);
-             return lexer.inlineTokens(src);
+           if (!isEP2 && edge2.index !== way2.nodes.indexOf(vertex.id)) {
+             way2 = way2.removeNode(vertex.id).addNode(vertex.id, edge2.index);
+             graph = graph.replace(way2);
            }
-         }]);
 
-         return Lexer;
-       }();
+           return graph;
+         }
 
-       var defaults$3 = defaults.defaults;
-       var cleanUrl$1 = helpers.cleanUrl,
-           escape$2 = helpers.escape;
-       /**
-        * Renderer
-        */
+         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);
+           }
 
-       var Renderer_1 = /*#__PURE__*/function () {
-         function Renderer(options) {
-           _classCallCheck(this, Renderer);
+           return graph;
+         } // check if moving way endpoint can cross an unmoved way, if so limit delta..
 
-           this.options = options || defaults$3;
-         }
 
-         _createClass(Renderer, [{
-           key: "code",
-           value: function code(_code, infostring, escaped) {
-             var lang = (infostring || '').match(/\S*/)[0];
+         function limitDelta(graph) {
+           function moveNode(loc) {
+             return geoVecAdd(projection(loc), _delta);
+           }
 
-             if (this.options.highlight) {
-               var out = this.options.highlight(_code, lang);
+           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 (out != null && out !== _code) {
-                 escaped = true;
-                 _code = out;
-               }
-             }
+             if (obj.movedIsEP && obj.unmovedIsEP) continue; // Don't limit movement if this vertex is not an endpoint anyway..
 
-             _code = _code.replace(/\n$/, '') + '\n';
+             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);
 
-             if (!lang) {
-               return '<pre><code>' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
+             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);
              }
-
-             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
+         }
 
+         var action = function action(graph) {
+           if (_delta[0] === 0 && _delta[1] === 0) return graph;
+           setupCache(graph);
 
-             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';
+           if (cache.intersections.length) {
+             limitDelta(graph);
            }
-         }, {
-           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
 
-         }, {
-           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>';
+           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)));
            }
-         }, {
-           key: "del",
-           value: function del(text) {
-             return '<del>' + text + '</del>';
+
+           if (cache.intersections.length) {
+             graph = cleanupIntersections(graph);
            }
-         }, {
-           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.delta = function () {
+           return _delta;
+         };
 
-             if (title) {
-               out += ' title="' + title + '"';
-             }
+         return action;
+       }
 
-             out += '>' + text + '</a>';
-             return out;
-           }
-         }, {
-           key: "image",
-           value: function image(href, title, text) {
-             href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);
+       function actionMoveMember(relationId, fromIndex, toIndex) {
+         return function (graph) {
+           return graph.replace(graph.entity(relationId).moveMember(fromIndex, toIndex));
+         };
+       }
 
-             if (href === null) {
-               return text;
-             }
+       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)));
+         };
 
-             var out = '<img src="' + href + '" alt="' + text + '"';
+         action.transitionable = true;
+         return action;
+       }
 
-             if (title) {
-               out += ' title="' + title + '"';
-             }
+       function actionNoop() {
+         return function (graph) {
+           return graph;
+         };
+       }
 
-             out += this.options.xhtml ? '/>' : '>';
-             return out;
-           }
-         }, {
-           key: "text",
-           value: function text(_text) {
-             return _text;
-           }
-         }]);
+       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 Renderer;
-       }();
+         var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
+         var upperThreshold = Math.cos(threshold * Math.PI / 180);
 
-       /**
-        * TextRenderer
-        * returns only the textual part of the token
-        */
-       var TextRenderer_1 = /*#__PURE__*/function () {
-         function TextRenderer() {
-           _classCallCheck(this, TextRenderer);
-         }
+         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
 
-         _createClass(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 '';
+           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
+             });
            }
-         }]);
 
-         return TextRenderer;
-       }();
+           graph = graph.replace(way);
+           var isClosed = way.isClosed();
+           var nodes = graph.childNodes(way).slice(); // shallow copy
 
-       /**
-        * Slugger generates header id
-        */
-       var Slugger_1 = /*#__PURE__*/function () {
-         function Slugger() {
-           _classCallCheck(this, Slugger);
+           if (isClosed) nodes.pop();
 
-           this.seen = {};
-         }
+           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
 
-         _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
-            */
 
-         }, {
-           key: "getNextSafeSlug",
-           value: function getNextSafeSlug(originalSlug, isDryRun) {
-             var slug = originalSlug;
-             var occurenceAccumulator = 0;
+           var nodeCount = {};
+           var points = [];
+           var corner = {
+             i: 0,
+             dotp: 1
+           };
+           var node, point, loc, score, motions, i, j;
 
-             if (this.seen.hasOwnProperty(slug)) {
-               occurenceAccumulator = this.seen[originalSlug];
+           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)
+             });
+           }
 
-               do {
-                 occurenceAccumulator++;
-                 slug = originalSlug + '-' + occurenceAccumulator;
-               } while (this.seen.hasOwnProperty(slug));
+           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 (score < epsilon) {
+                 break;
+               }
              }
 
-             if (!isDryRun) {
-               this.seen[originalSlug] = occurenceAccumulator;
-               this.seen[slug] = 0;
-             }
+             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;
 
-             return slug;
-           }
-           /**
-            * Convert string to unique id
-            * @param {object} options
-            * @param {boolean} options.dryrun Generates the next unique slug without updating the internal accumulator.
-            */
+               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));
+               }
 
-         }, {
-           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 (dotp > upperThreshold) {
+                 straights.push(point);
+               } else {
+                 simplified.push(point);
+               }
+             } // Orthogonalize the simplified shape
 
-         return Slugger;
-       }();
 
-       var defaults$4 = defaults.defaults;
-       var unescape$2 = helpers.unescape;
-       /**
-        * Parsing & Compiling
-        */
+             var bestPoints = clonePoints(simplified);
+             var originalPoints = clonePoints(simplified);
+             score = Infinity;
 
-       var Parser_1 = /*#__PURE__*/function () {
-         function Parser(options) {
-           _classCallCheck(this, Parser);
+             for (i = 0; i < 1000; i++) {
+               motions = simplified.map(calcMotion);
 
-           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 (j = 0; j < motions.length; j++) {
+                 simplified[j].coord = geoVecAdd(simplified[j].coord, motions[j]);
+               }
 
+               var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);
 
-         _createClass(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;
+               if (newScore < score) {
+                 bestPoints = clonePoints(simplified);
+                 score = newScore;
+               }
 
-             for (i = 0; i < l; i++) {
-               token = tokens[i];
+               if (score < epsilon) {
+                 break;
+               }
+             }
 
-               switch (token.type) {
-                 case 'space':
-                   {
-                     continue;
-                   }
+             var bestCoords = bestPoints.map(function (p) {
+               return p.coord;
+             });
+             if (isClosed) bestCoords.push(bestCoords[0]); // move the nodes that should move
 
-                 case 'hr':
-                   {
-                     out += this.renderer.hr();
-                     continue;
-                   }
+             for (i = 0; i < bestPoints.length; i++) {
+               point = bestPoints[i];
 
-                 case 'heading':
-                   {
-                     out += this.renderer.heading(this.parseInline(token.tokens), token.depth, unescape$2(this.parseInline(token.tokens, this.textRenderer)), this.slugger);
-                     continue;
-                   }
+               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
 
-                 case 'code':
-                   {
-                     out += this.renderer.code(token.text, token.lang, token.escaped);
-                     continue;
-                   }
 
-                 case 'table':
-                   {
-                     header = ''; // header
+             for (i = 0; i < straights.length; i++) {
+               point = straights[i];
+               if (nodeCount[point.id] > 1) continue; // skip self-intersections
 
-                     cell = '';
-                     l2 = token.header.length;
+               node = graph.entity(point.id);
 
-                     for (j = 0; j < l2; j++) {
-                       cell += this.renderer.tablecell(this.parseInline(token.tokens.header[j]), {
-                         header: true,
-                         align: token.align[j]
-                       });
-                     }
+               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);
 
-                     header += this.renderer.tablerow(cell);
-                     body = '';
-                     l2 = token.cells.length;
+                 if (choice) {
+                   loc = projection.invert(choice.target);
+                   graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+                 }
+               }
+             }
+           }
 
-                     for (j = 0; j < l2; j++) {
-                       row = token.tokens.cells[j];
-                       cell = '';
-                       l3 = row.length;
+           return graph;
 
-                       for (k = 0; k < l3; k++) {
-                         cell += this.renderer.tablecell(this.parseInline(row[k]), {
-                           header: false,
-                           align: token.align[k]
-                         });
-                       }
+           function clonePoints(array) {
+             return array.map(function (p) {
+               return {
+                 id: p.id,
+                 coord: [p.coord[0], p.coord[1]]
+               };
+             });
+           }
 
-                       body += this.renderer.tablerow(cell);
-                     }
+           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)
 
-                     out += this.renderer.table(header, body);
-                     continue;
-                   }
+             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);
 
-                 case 'blockquote':
-                   {
-                     body = this.parse(token.tokens);
-                     out += this.renderer.blockquote(body);
-                     continue;
-                   }
+             if (val < lowerThreshold) {
+               // nearly orthogonal
+               corner.i = i;
+               corner.dotp = val;
+               var vec = geoVecNormalize(geoVecAdd(p, q));
+               return geoVecScale(vec, 0.1 * dotp * scale);
+             }
 
-                 case 'list':
-                   {
-                     ordered = token.ordered;
-                     start = token.start;
-                     loose = token.loose;
-                     l2 = token.items.length;
-                     body = '';
+             return [0, 0]; // do nothing
+           }
+         }; // if we are only orthogonalizing one vertex,
+         // get that vertex and the previous and next
 
-                     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);
+         function nodeSubset(nodes, vertexID, isClosed) {
+           var first = isClosed ? 0 : 1;
+           var last = isClosed ? nodes.length : nodes.length - 1;
 
-                         if (loose) {
-                           if (item.tokens.length > 0 && item.tokens[0].type === 'text') {
-                             item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;
+           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 (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 [];
+         }
 
-                       itemBody += this.parse(item.tokens, loose);
-                       body += this.renderer.listitem(itemBody, task, checked);
-                     }
+         action.disabled = function (graph) {
+           var way = graph.entity(wayID);
+           way = way.removeNode(''); // sanity check - remove any consecutive duplicates
 
-                     out += this.renderer.list(body, ordered, start);
-                     continue;
-                   }
+           graph = graph.replace(way);
+           var isClosed = way.isClosed();
+           var nodes = graph.childNodes(way).slice(); // shallow copy
 
-                 case 'html':
-                   {
-                     // TODO parse inline content if parameter markdown=1
-                     out += this.renderer.html(token.text);
-                     continue;
-                   }
+           if (isClosed) nodes.pop();
+           var allowStraightAngles = false;
 
-                 case 'paragraph':
-                   {
-                     out += this.renderer.paragraph(this.parseInline(token.tokens));
-                     continue;
-                   }
+           if (vertexID !== undefined) {
+             allowStraightAngles = true;
+             nodes = nodeSubset(nodes, vertexID, isClosed);
+             if (nodes.length !== 3) return 'end_vertex';
+           }
 
-                 case 'text':
-                   {
-                     body = token.tokens ? this.parseInline(token.tokens) : token.text;
+           var coords = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var score = geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles);
 
-                     while (i + 1 < l && tokens[i + 1].type === 'text') {
-                       token = tokens[++i];
-                       body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
-                     }
+           if (score === null) {
+             return 'not_squarish';
+           } else if (score === 0) {
+             return 'square_enough';
+           } else {
+             return false;
+           }
+         };
 
-                     out += top ? this.renderer.paragraph(body) : body;
-                     continue;
-                   }
+         action.transitionable = true;
+         return action;
+       }
 
-                 default:
-                   {
-                     var errMsg = 'Token with "' + token.type + '" type was not found.';
+       //
+       // `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.
+       //
 
-                     if (this.options.silent) {
-                       console.error(errMsg);
-                       return;
-                     } else {
-                       throw new Error(errMsg);
-                     }
-                   }
-               }
-             }
+       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'
+           });
 
-             return out;
+           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'
+               });
+             });
            }
-           /**
-            * Parse Inline Tokens
-            */
 
-         }, {
-           key: "parseInline",
-           value: function parseInline(tokens, renderer) {
-             renderer = renderer || this.renderer;
-             var out = '',
-                 i,
-                 token;
-             var l = tokens.length;
+           members.push({
+             id: toWay.id,
+             type: 'way',
+             role: 'to'
+           });
+           return graph.replace(osmRelation({
+             id: restrictionID,
+             tags: {
+               type: 'restriction',
+               restriction: restrictionType
+             },
+             members: members
+           }));
+         };
+       }
 
-             for (i = 0; i < l; i++) {
-               token = tokens[i];
+       function actionRevert(id) {
+         var action = function action(graph) {
+           var entity = graph.hasEntity(id),
+               base = graph.base().entities[id];
 
-               switch (token.type) {
-                 case 'escape':
-                   {
-                     out += renderer.text(token.text);
-                     break;
-                   }
+           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);
 
-                 case 'html':
-                   {
-                     out += renderer.html(token.text);
-                     break;
-                   }
+                 if (parent.isDegenerate()) {
+                   graph = actionDeleteWay(parent.id)(graph);
+                 }
+               });
+             }
 
-                 case 'link':
-                   {
-                     out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
-                     break;
-                   }
+             graph.parentRelations(entity).forEach(function (parent) {
+               parent = parent.removeMembersWithID(id);
+               graph = graph.replace(parent);
 
-                 case 'image':
-                   {
-                     out += renderer.image(token.href, token.title, token.text);
-                     break;
-                   }
+               if (parent.isDegenerate()) {
+                 graph = actionDeleteRelation(parent.id)(graph);
+               }
+             });
+           }
 
-                 case 'strong':
-                   {
-                     out += renderer.strong(this.parseInline(token.tokens, renderer));
-                     break;
-                   }
+           return graph.revert(id);
+         };
 
-                 case 'em':
-                   {
-                     out += renderer.em(this.parseInline(token.tokens, renderer));
-                     break;
-                   }
+         return action;
+       }
 
-                 case 'codespan':
-                   {
-                     out += renderer.codespan(token.text);
-                     break;
-                   }
+       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)));
+             });
+           });
+         };
 
-                 case 'br':
-                   {
-                     out += renderer.br();
-                     break;
-                   }
+         return action;
+       }
 
-                 case 'del':
-                   {
-                     out += renderer.del(this.parseInline(token.tokens, renderer));
-                     break;
-                   }
+       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)));
+             });
+           });
+         };
+       }
 
-                 case 'text':
-                   {
-                     out += renderer.text(token.text);
-                     break;
-                   }
+       /* Align nodes along their common axis */
 
-                 default:
-                   {
-                     var errMsg = 'Token with "' + token.type + '" type was not found.';
+       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 (this.options.silent) {
-                       console.error(errMsg);
-                       return;
-                     } else {
-                       throw new Error(errMsg);
-                     }
-                   }
-               }
-             }
 
-             return out;
-           }
-         }], [{
-           key: "parse",
-           value: function parse(tokens, options) {
-             var parser = new Parser(options);
-             return parser.parse(tokens);
-           }
-           /**
-            * Static Parse Inline Method
-            */
+         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 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);
 
-         }, {
-           key: "parseInline",
-           value: function parseInline(tokens, options) {
-             var parser = new Parser(options);
-             return parser.parseInline(tokens);
+           if (isLong) {
+             return [p1, q1];
            }
-         }]);
 
-         return Parser;
-       }();
+           return [p2, q2];
+         }
 
-       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 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 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');
-         }
+           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 (typeof src !== 'string') {
-           throw new Error('marked(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
-         }
+           return graph;
+         };
 
-         if (typeof opt === 'function') {
-           callback = opt;
-           opt = null;
-         }
+         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;
 
-         opt = merge$3({}, marked.defaults, opt || {});
-         checkSanitizeDeprecation$1(opt);
+           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);
 
-         if (callback) {
-           var highlight = opt.highlight;
-           var tokens;
+             if (!isNaN(dist) && dist > maxDistance) {
+               maxDistance = dist;
+             }
+           }
 
-           try {
-             tokens = Lexer_1.lex(src, opt);
-           } catch (e) {
-             return callback(e);
+           if (maxDistance < 0.0001) {
+             return 'straight_enough';
            }
+         };
 
-           var done = function done(err) {
-             var out;
+         action.transitionable = true;
+         return action;
+       }
 
-             if (!err) {
-               try {
-                 out = Parser_1.parse(tokens, opt);
-               } catch (e) {
-                 err = e;
-               }
-             }
+       /*
+        * Based on https://github.com/openstreetmap/potlatch2/net/systemeD/potlatch2/tools/Straighten.as
+        */
 
-             opt.highlight = highlight;
-             return err ? callback(err) : callback(null, out);
-           };
+       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
 
-           if (!highlight || highlight.length < 3) {
-             return done();
-           }
 
-           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);
-                   }
+         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';
+           });
 
-                   if (code != null && code !== token.text) {
-                     token.text = code;
-                     token.escaped = true;
-                   }
+           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"]
 
-                   pending--;
 
-                   if (pending === 0) {
-                     done();
-                   }
-                 });
-               }, 0);
-             }
+           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 (pending === 0) {
-             done();
-           }
+           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
 
-           return;
-         }
+           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
 
-         try {
-           var _tokens = Lexer_1.lex(src, opt);
 
-           if (opt.walkTokens) {
-             marked.walkTokens(_tokens, opt.walkTokens);
-           }
+           while (remainingWays.length) {
+             nextWay = getNextWay(currNode, remainingWays);
+             remainingWays = utilArrayDifference(remainingWays, [nextWay]);
 
-           return Parser_1.parse(_tokens, opt);
-         } catch (e) {
-           e.message += '\nPlease report this to https://github.com/markedjs/marked.';
+             if (nextWay[0] !== currNode) {
+               nextWay.reverse();
+             }
 
-           if (opt.silent) {
-             return '<p>An error occurred:</p><pre>' + escape$3(e.message + '', true) + '</pre>';
+             nodes = nodes.concat(nextWay);
+             currNode = nodes[nodes.length - 1];
+           } // If user selected 2 nodes to straighten between, then slice nodes array to those nodes
+
+
+           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);
            }
 
-           throw e;
+           return nodes.map(function (n) {
+             return graph.entity(n);
+           });
          }
-       }
-       /**
-        * Options
-        */
 
+         function shouldKeepNode(node, graph) {
+           return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
+         }
 
-       marked.options = marked.setOptions = function (opt) {
-         merge$3(marked.defaults, opt);
-         changeDefaults(marked.defaults);
-         return marked;
-       };
+         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;
 
-       marked.getDefaults = getDefaults;
-       marked.defaults = defaults$5;
-       /**
-        * Use Extension
-        */
+           for (i = 1; i < points.length - 1; i++) {
+             var node = nodes[i];
+             var point = points[i];
 
-       marked.use = function (extension) {
-         var opts = merge$3({}, extension);
+             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 (extension.renderer) {
-           (function () {
-             var renderer = marked.defaults.renderer || new Renderer_1();
+           for (i = 0; i < toDelete.length; i++) {
+             graph = actionDeleteNode(toDelete[i].id)(graph);
+           }
 
-             var _loop = function _loop(prop) {
-               var prevRenderer = renderer[prop];
+           return graph;
+         };
 
-               renderer[prop] = function () {
-                 for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
-                   args[_key] = arguments[_key];
-                 }
+         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;
 
-                 var ret = extension.renderer[prop].apply(renderer, args);
+           if (threshold === 0) {
+             return 'too_bendy';
+           }
 
-                 if (ret === false) {
-                   ret = prevRenderer.apply(renderer, args);
-                 }
+           var maxDistance = 0;
 
-                 return ret;
-               };
-             };
+           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
 
-             for (var prop in extension.renderer) {
-               _loop(prop);
+             if (isNaN(dist) || dist > threshold) {
+               return 'too_bendy';
+             } else if (dist > maxDistance) {
+               maxDistance = dist;
              }
+           }
 
-             opts.renderer = renderer;
-           })();
-         }
+           var keepingAllNodes = nodes.every(function (node, i) {
+             return i === 0 || i === nodes.length - 1 || shouldKeepNode(node, graph);
+           });
 
-         if (extension.tokenizer) {
-           (function () {
-             var tokenizer = marked.defaults.tokenizer || new Tokenizer_1();
+           if (maxDistance < 0.0001 && // Allow straightening even if already straight in order to remove extraneous nodes
+           keepingAllNodes) {
+             return 'straight_enough';
+           }
+         };
 
-             var _loop2 = function _loop2(prop) {
-               var prevTokenizer = tokenizer[prop];
+         action.transitionable = true;
+         return action;
+       }
 
-               tokenizer[prop] = function () {
-                 for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
-                   args[_key2] = arguments[_key2];
-                 }
+       //
+       // `turn` must be an `osmTurn` object with a `restrictionID` property.
+       // see osm/intersection.js, pathToTurn()
+       //
 
-                 var ret = extension.tokenizer[prop].apply(tokenizer, args);
+       function actionUnrestrictTurn(turn) {
+         return function (graph) {
+           return actionDeleteRelation(turn.restrictionID)(graph);
+         };
+       }
 
-                 if (ret === false) {
-                   ret = prevTokenizer.apply(tokenizer, args);
-                 }
+       /* Reflect the given area around its axis of symmetry */
 
-                 return ret;
-               };
-             };
+       function actionReflect(reflectIds, projection) {
+         var _useLongAxis = true;
 
-             for (var prop in extension.tokenizer) {
-               _loop2(prop);
-             }
+         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.
 
-             opts.tokenizer = tokenizer;
-           })();
-         }
+           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);
 
-         if (extension.walkTokens) {
-           var walkTokens = marked.defaults.walkTokens;
+           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
 
-           opts.walkTokens = function (token) {
-             extension.walkTokens(token);
 
-             if (walkTokens) {
-               walkTokens(token);
-             }
-           };
-         }
+           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);
 
-         marked.setOptions(opts);
-       };
-       /**
-        * Run callback for every token
-        */
+           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);
+           }
 
+           return graph;
+         };
 
-       marked.walkTokens = function (tokens, callback) {
-         var _iterator = _createForOfIteratorHelper(tokens),
-             _step;
+         action.useLongAxis = function (val) {
+           if (!arguments.length) return _useLongAxis;
+           _useLongAxis = val;
+           return action;
+         };
 
-         try {
-           for (_iterator.s(); !(_step = _iterator.n()).done;) {
-             var token = _step.value;
-             callback(token);
+         action.transitionable = true;
+         return action;
+       }
 
-             switch (token.type) {
-               case 'table':
-                 {
-                   var _iterator2 = _createForOfIteratorHelper(token.tokens.header),
-                       _step2;
+       function actionUpgradeTags(entityId, oldTags, replaceTags) {
+         return function (graph) {
+           var entity = graph.entity(entityId);
+           var tags = Object.assign({}, entity.tags); // shallow copy
 
-                   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 transferValue;
+           var semiIndex;
 
-                   var _iterator3 = _createForOfIteratorHelper(token.tokens.cells),
-                       _step3;
+           for (var oldTagKey in oldTags) {
+             if (!(oldTagKey in tags)) continue; // wildcard match
 
-                   try {
-                     for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
-                       var row = _step3.value;
+             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]);
 
-                       var _iterator4 = _createForOfIteratorHelper(row),
-                           _step4;
+               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;
+                 }
 
-                       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();
-                   }
+                 vals.splice(oldIndex, 1);
+                 tags[oldTagKey] = vals.join(';');
+               }
+             }
+           }
 
-                   break;
-                 }
+           if (replaceTags) {
+             for (var replaceKey in replaceTags) {
+               var replaceValue = replaceTags[replaceKey];
 
-               case 'list':
-                 {
-                   marked.walkTokens(token.items, callback);
-                   break;
+               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);
 
-               default:
-                 {
-                   if (token.tokens) {
-                     marked.walkTokens(token.tokens, callback);
+                   if (existingVals.indexOf(replaceValue) === -1) {
+                     existingVals.splice(semiIndex, 0, replaceValue);
+                     tags[replaceKey] = existingVals.join(';');
                    }
+                 } else {
+                   tags[replaceKey] = replaceValue;
                  }
+               }
              }
            }
-         } catch (err) {
-           _iterator.e(err);
-         } finally {
-           _iterator.f();
-         }
-       };
-       /**
-        * Parse Inline
-        */
-
 
-       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');
-         }
+           return graph.replace(entity.update({
+             tags: tags
+           }));
+         };
+       }
 
-         if (typeof src !== 'string') {
-           throw new Error('marked.parseInline(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+       function behaviorEdit(context) {
+         function behavior() {
+           context.map().minzoom(context.minEditableZoom());
          }
 
-         opt = merge$3({}, marked.defaults, opt || {});
-         checkSanitizeDeprecation$1(opt);
-
-         try {
-           var tokens = Lexer_1.lexInline(src, opt);
-
-           if (opt.walkTokens) {
-             marked.walkTokens(tokens, opt.walkTokens);
-           }
+         behavior.off = function () {
+           context.map().minzoom(0);
+         };
 
-           return Parser_1.parseInline(tokens, opt);
-         } catch (e) {
-           e.message += '\nPlease report this to https://github.com/markedjs/marked.';
+         return behavior;
+       }
 
-           if (opt.silent) {
-             return '<p>An error occurred:</p><pre>' + escape$3(e.message + '', true) + '</pre>';
-           }
+       /*
+          The hover behavior adds the `.hover` class on pointerover to all elements to which
+          the identical datum is bound, and removes it on pointerout.
 
-           throw e;
-         }
-       };
-       /**
-        * Expose
+          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');
 
-       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;
-
-       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
+         var _selection = select(null);
 
-       var _cache$2;
+         var _newNodeId = null;
+         var _initialNodeID = null;
 
-       function abortRequest$2(controller) {
-         if (controller) {
-           controller.abort();
-         }
-       }
+         var _altDisables;
 
-       function abortUnwantedRequests$2(cache, tiles) {
-         Object.keys(cache.inflightTile).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k === tile.id;
-           });
+         var _ignoreVertex;
 
-           if (!wanted) {
-             abortRequest$2(cache.inflightTile[k]);
-             delete cache.inflightTile[k];
-           }
-         });
-       }
+         var _targets = []; // use pointer events on supported platforms; fallback to mouse events
 
-       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
+         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 updateRtree$2(item, replace) {
-         _cache$2.rtree.remove(item, function (a, b) {
-           return a.data.id === b.data.id;
-         });
+             _selection.classed('hover-disabled', true);
 
-         if (replace) {
-           _cache$2.rtree.insert(item);
+             dispatch.call('hover', this, null);
+           }
          }
-       } // Issues shouldn't obscure each other
-
-
-       function preventCoincident$1(loc) {
-         var coincident = false;
-
-         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);
 
-         return loc;
-       }
+         function keyup(d3_event) {
+           if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false).classed('hover', true);
 
-       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]);
-             }, []);
-           });
+             _selection.classed('hover-disabled', false);
 
-           if (!_cache$2) {
-             this.reset();
+             dispatch.call('hover', this, _targets);
            }
+         }
 
-           this.event = utilRebind(this, dispatch$3, 'on');
-         },
-         reset: function reset() {
-           var _strings = {};
-           var _colors = {};
-
-           if (_cache$2) {
-             Object.values(_cache$2.inflightTile).forEach(abortRequest$2); // Strings and colors are static and should not be re-populated
+         function behavior(selection) {
+           _selection = selection;
+           _targets = [];
 
-             _strings = _cache$2.strings;
-             _colors = _cache$2.colors;
+           if (_initialNodeID) {
+             _newNodeId = _initialNodeID;
+             _initialNodeID = null;
+           } else {
+             _newNodeId = null;
            }
 
-           _cache$2 = {
-             data: {},
-             loadedTile: {},
-             inflightTile: {},
-             inflightPost: {},
-             closed: {},
-             rtree: new RBush(),
-             strings: _strings,
-             colors: _colors
-           };
-         },
-         loadIssues: function loadIssues(projection) {
-           var _this = this;
+           _selection.on(_pointerPrefix + 'over.hover', pointerover).on(_pointerPrefix + 'out.hover', pointerout) // treat pointerdown as pointerover for touch devices
+           .on(_pointerPrefix + 'down.hover', pointerover);
 
-           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
+           select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true).on('keydown.hover', keydown).on('keyup.hover', keyup);
 
-           var tiles = tiler$2.zoomExtent([_tileZoom$2, _tileZoom$2]).getTiles(projection); // abort inflight requests that are no longer needed
+           function eventTarget(d3_event) {
+             var datum = d3_event.target && d3_event.target.__data__;
+             if (_typeof(datum) !== 'object') return null;
 
-           abortUnwantedRequests$2(_cache$2, tiles); // issue new requests..
+             if (!(datum instanceof osmEntity) && datum.properties && datum.properties.entity instanceof osmEntity) {
+               return datum.properties.entity;
+             }
 
-           tiles.forEach(function (tile) {
-             if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) return;
+             return datum;
+           }
 
-             var _tile$xyz = _slicedToArray(tile.xyz, 3),
-                 x = _tile$xyz[0],
-                 y = _tile$xyz[1],
-                 z = _tile$xyz[2];
+           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);
 
-             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;
+             if (target && _targets.indexOf(target) === -1) {
+               _targets.push(target);
 
-               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) */
+               updateHover(d3_event, _targets);
+             }
+           }
 
-                   var itemType = "".concat(item, "-").concat(cl); // Filter out unsupported issue types (some are too specific or advanced)
+           function pointerout(d3_event) {
+             var target = eventTarget(d3_event);
 
-                   if (itemType in _osmoseData.icons) {
-                     var loc = issue.geometry.coordinates; // lon, lat
+             var index = _targets.indexOf(target);
 
-                     loc = preventCoincident$1(loc);
-                     var d = new QAItem(loc, _this, itemType, id, {
-                       item: item
-                     }); // Setting elems here prevents UI detail requests
+             if (index !== -1) {
+               _targets.splice(index);
 
-                     if (item === 8300 || item === 8360) {
-                       d.elems = [];
-                     }
+               updateHover(d3_event, _targets);
+             }
+           }
 
-                     _cache$2.data[d.id] = d;
+           function allowsVertex(d) {
+             return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+           }
 
-                     _cache$2.rtree.insert(encodeIssueRtree$2(d));
-                   }
-                 });
-               }
+           function modeAllowsHover(target) {
+             var mode = context.mode();
 
-               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;
+             if (mode.id === 'add-point') {
+               return mode.preset.matchGeometry('vertex') || target.type !== 'way' && target.geometry(context.graph()) !== 'vertex';
+             }
 
-           // Issue details only need to be fetched once
-           if (issue.elems !== undefined) {
-             return Promise.resolve(issue);
+             return true;
            }
 
-           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
+           function updateHover(d3_event, targets) {
+             _selection.selectAll('.hover').classed('hover', false);
 
-             issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';
+             _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
 
-             _this2.replaceItem(issue);
-           };
+             var mode = context.mode();
 
-           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);
+             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 (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
+             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);
+               }
 
+               return true;
+             });
+             var selector = '';
 
-           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
+             for (var i in targets) {
+               var datum = targets[i]; // What are we hovering over?
 
+               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;
 
-           var allRequests = items.map(function (itemType) {
-             // No need to request data we already have
-             if (itemType in _cache$2.strings[locale]) return null;
+                 if (datum.type === 'relation') {
+                   for (var j in datum.members) {
+                     selector += ', .' + datum.members[j].id;
+                   }
+                 }
+               }
+             }
 
-             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$categories$;
+             var suppressed = _altDisables && d3_event && d3_event.altKey;
 
-               var _cat$items = _slicedToArray(cat.items, 1),
-                   _cat$items$ = _cat$items[0],
-                   item = _cat$items$ === void 0 ? {
-                 "class": []
-               } : _cat$items$;
+             if (selector.trim().length) {
+               // remove the first comma
+               selector = selector.slice(1);
 
-               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)
+               _selection.selectAll(selector).classed(suppressed ? 'hover-suppressed' : 'hover', true);
+             }
 
+             dispatch.call('hover', this, !suppressed && targets);
+           }
+         }
 
-               if (!cl) {
-                 /* eslint-disable no-console */
-                 console.log("Osmose strings request (".concat(itemType, ") had unexpected data"));
-                 /* eslint-enable no-console */
+         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);
+         };
 
-                 return;
-               } // Cache served item colors to automatically style issue markers later
+         behavior.altDisables = function (val) {
+           if (!arguments.length) return _altDisables;
+           _altDisables = val;
+           return behavior;
+         };
 
+         behavior.ignoreVertex = function (val) {
+           if (!arguments.length) return _ignoreVertex;
+           _ignoreVertex = val;
+           return behavior;
+         };
 
-               var itemInt = item.item,
-                   color = item.color;
+         behavior.initialNodeID = function (nodeId) {
+           _initialNodeID = nodeId;
+           return behavior;
+         };
 
-               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
+         return utilRebind(behavior, dispatch, 'on');
+       }
 
+       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');
 
-               var title = cl.title,
-                   detail = cl.detail,
-                   fix = cl.fix,
-                   trap = cl.trap; // Osmose titles shouldn't contain markdown
+         var _hover = behaviorHover(context).altDisables(true).ignoreVertex(true).on('hover', context.ui().sidebar.hover);
 
-               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;
-             };
+         var _edit = behaviorEdit(context);
 
-             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 _closeTolerance = 4;
+         var _tolerance = 12;
+         var _mouseLeave = false;
+         var _lastMouse = null;
 
+         var _lastPointerUpEvent;
 
-             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;
+         var _downPointer; // use pointer events on supported platforms; fallback to mouse events
 
-           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'
 
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // related code
+         // - `mode/drag_node.js` `datum()`
 
-           var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "/").concat(issue.newStatus);
-           var controller = new AbortController();
 
-           var after = function after() {
-             delete _cache$2.inflightPost[issue.id];
+         function datum(d3_event) {
+           var mode = context.mode();
+           var isNote = mode && mode.id.indexOf('note') !== -1;
+           if (d3_event.altKey || isNote) return {};
+           var element;
 
-             _this3.removeItem(issue);
+           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)
 
-             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;
-               }
 
-               _cache$2.closed[issue.item] += 1;
-             }
+           var d = element.__data__;
+           return d && d.properties && d.properties.target ? d : {};
+         }
 
-             if (callback) callback(null, issue);
+         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));
+         }
 
-           _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
+         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);
 
-           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);
+           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);
+           }
          }
-       };
 
-       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 pointermove(d3_event) {
+           if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse') && !_downPointer.isCancelled) {
+             var p2 = _downPointer.pointerLocGetter(d3_event);
 
-       var _mlyCache;
+             var dist = geoVecLength(_downPointer.downLoc, p2);
 
-       var _mlyClicks;
+             if (dist >= _closeTolerance) {
+               _downPointer.isCancelled = true;
+               dispatch.call('downcancel', this);
+             }
+           }
 
-       var _mlyActiveImage;
+           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.
 
-       var _mlySelectedImageKey;
+           if (_lastPointerUpEvent && _lastPointerUpEvent.pointerType !== 'mouse' && d3_event.timeStamp - _lastPointerUpEvent.timeStamp < 100) return;
+           _lastMouse = d3_event;
+           dispatch.call('move', this, d3_event, datum(d3_event));
+         }
 
-       var _mlyViewer;
+         function pointercancel(d3_event) {
+           if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse')) {
+             if (!_downPointer.isCancelled) {
+               dispatch.call('downcancel', this);
+             }
 
-       var _mlyViewerFilter = ['all'];
+             _downPointer = null;
+           }
+         }
 
-       var _loadViewerPromise;
+         function mouseenter() {
+           _mouseLeave = false;
+         }
 
-       var _mlyHighlightedDetection;
+         function mouseleave() {
+           _mouseLeave = true;
+         }
 
-       var _mlyShowFeatureDetections = false;
-       var _mlyShowSignDetections = false;
+         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$3(controller) {
-         controller.abort();
-       }
 
-       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
+         function click(d3_event, loc) {
+           var d = datum(d3_event);
+           var target = d && d.properties && d.properties.entity;
+           var mode = context.mode();
 
-         var cache = _mlyCache[which];
-         Object.keys(cache.inflight).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k.indexOf(tile.id + ',') === 0;
-           });
+           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());
 
-           if (!wanted) {
-             abortRequest$3(cache.inflight[k]);
-             delete cache.inflight[k];
+             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);
            }
-         });
-         tiles.forEach(function (tile) {
-           loadNextTilePage(which, currZoom, url, tile);
-         });
-       }
+         } // treat a spacebar press like a click
 
-       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'
-           }
-         };
-         fetch(nextURL, options).then(function (response) {
-           if (!response.ok) {
-             throw new Error(response.status + ' ' + response.statusText);
-           }
 
-           var linkHeader = response.headers.get('Link');
+         function space(d3_event) {
+           d3_event.preventDefault();
+           d3_event.stopPropagation();
+           var currSpace = context.map().mouse();
 
-           if (linkHeader) {
-             var pagination = parsePagination(linkHeader);
+           if (_disableSpace && _lastSpace) {
+             var dist = geoVecLength(_lastSpace, currSpace);
 
-             if (pagination.next) {
-               cache.nextURL[tile.id] = pagination.next;
+             if (dist > _tolerance) {
+               _disableSpace = false;
              }
            }
 
-           return response.json();
-         }).then(function (data) {
-           cache.loaded[id] = true;
-           delete cache.inflight[id];
+           if (_disableSpace || _mouseLeave || !_lastMouse) return; // user must move mouse or release space bar to allow another click
 
-           if (!data || !data.features || !data.features.length) {
-             throw new Error('No Data');
-           }
+           _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
 
-           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
+           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);
+         }
 
-             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
-               };
-             }
+         function backspace(d3_event) {
+           d3_event.preventDefault();
+           dispatch.call('undo');
+         }
 
-             return {
-               minX: loc[0],
-               minY: loc[1],
-               maxX: loc[0],
-               maxY: loc[1],
-               data: d
-             };
-           }).filter(Boolean);
+         function del(d3_event) {
+           d3_event.preventDefault();
+           dispatch.call('cancel');
+         }
 
-           if (cache.rtree && features) {
-             cache.rtree.load(features);
-           }
+         function ret(d3_event) {
+           d3_event.preventDefault();
+           dispatch.call('finish');
+         }
 
-           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
-           }
+         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;
+         }
 
-           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];
-         });
-       }
+         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
 
-       function loadData(which, url) {
-         var cache = _mlyCache[which];
-         var options = {
-           method: 'GET',
-           headers: {
-             'Content-Type': 'application/json'
-           }
+           select(document).call(keybinding.unbind);
          };
-         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');
-           }
+         behavior.hover = function () {
+           return _hover;
+         };
 
-           data.features.forEach(function (feature) {
-             var d;
+         return utilRebind(behavior, dispatch, 'on');
+       }
 
-             if (which === 'image_detections') {
-               d = {
-                 key: feature.properties.key,
-                 image_key: feature.properties.image_key,
-                 value: feature.properties.value,
-                 shape: feature.properties.shape
-               };
+       function initRange(domain, range) {
+         switch (arguments.length) {
+           case 0:
+             break;
 
-               if (!cache.forImageKey[d.image_key]) {
-                 cache.forImageKey[d.image_key] = [];
-               }
+           case 1:
+             this.range(domain);
+             break;
 
-               cache.forImageKey[d.image_key].push(d);
-             }
-           });
-         });
+           default:
+             this.range(range).domain(domain);
+             break;
+         }
+
+         return this;
        }
 
-       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 constants(x) {
+         return function () {
+           return x;
+         };
+       }
 
+       function number(x) {
+         return +x;
+       }
 
-       function parsePagination(links) {
-         return links.split(',').map(function (rel) {
-           var elements = rel.split(';');
+       var unit = [0, 1];
+       function identity$1(x) {
+         return x;
+       }
 
-           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
+       function normalize(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 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.
+       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));
+         };
+       }
 
+       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 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;
-         }, []);
+         if (domain[j] < domain[0]) {
+           domain = domain.slice().reverse();
+           range = range.slice().reverse();
+         }
+
+         while (++i < j) {
+           d[i] = normalize(domain[i], domain[i + 1]);
+           r[i] = interpolate(range[i], range[i + 1]);
+         }
+
+         return function (x) {
+           var i = bisectRight(domain, x, 1, j) - 1;
+           return r[i](d[i](x));
+         };
        }
 
-       var serviceMapillary = {
-         init: function init() {
-           if (!_mlyCache) {
-             this.reset();
-           }
+       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;
 
-           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);
-           }
+         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;
+         }
 
-           _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
+         function scale(x) {
+           return x == null || isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate)))(transform(clamp(x)));
+         }
 
-           _mlyCache.images.rtree.search(bbox).forEach(function (d) {
-             var sequenceKey = _mlyCache.sequences.forImageKey[d.data.key];
+         scale.invert = function (y) {
+           return clamp(untransform((input || (input = piecewise(range, domain.map(transform), d3_interpolateNumber)))(y)));
+         };
 
-             if (sequenceKey) {
-               sequenceKeys[sequenceKey] = true;
-             }
-           }); // Return lineStrings for the sequences
+         scale.domain = function (_) {
+           return arguments.length ? (domain = Array.from(_, number), rescale()) : domain.slice();
+         };
 
+         scale.range = function (_) {
+           return arguments.length ? (range = Array.from(_), rescale()) : range.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.rangeRound = function (_) {
+           return range = Array.from(_), interpolate = interpolateRound, rescale();
+         };
 
-           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;
+         scale.clamp = function (_) {
+           return arguments.length ? (clamp = _ ? true : identity$1, rescale()) : clamp !== identity$1;
+         };
 
-             function loaded() {
-               loadedCount += 1; // wait until both files are loaded
+         scale.interpolate = function (_) {
+           return arguments.length ? (interpolate = _, rescale()) : interpolate;
+         };
 
-               if (loadedCount === 2) resolve();
-             }
+         scale.unknown = function (_) {
+           return arguments.length ? (unknown = _, scale) : unknown;
+         };
 
-             var head = select('head'); // load mapillary-viewercss
+         return function (t, u) {
+           transform = t, untransform = u;
+           return rescale();
+         };
+       }
+       function continuous() {
+         return transformer()(identity$1, identity$1);
+       }
 
-             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 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].
 
-             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);
+       function formatDecimalParts(x, p) {
+         if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
+
+         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).
+
+         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;
+       }
+
+       function formatGroup (grouping, thousands) {
+         return function (value, width) {
+           var i = value.length,
+               t = [],
+               j = 0,
+               g = grouping[0],
+               length = 0;
+
+           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);
+         };
+       }
+
+       function formatNumerals (numerals) {
+         return function (value) {
+           return value.replace(/[0-9]/g, function (i) {
+             return numerals[+i];
            });
-           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
+         };
+       }
+
+       // [[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 + "";
+       }
 
-           }
-         },
-         showFeatureDetections: function showFeatureDetections(value) {
-           _mlyShowFeatureDetections = value;
+       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;
+       };
 
-           if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
-             this.resetTags();
-           }
-         },
-         showSignDetections: function showSignDetections(value) {
-           _mlyShowSignDetections = value;
+       // 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 (!_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]]);
+             case "0":
+               if (i0 === 0) i0 = i;
+               i1 = i;
+               break;
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             filter.push(['>=', 'capturedAt', fromTimestamp]);
+             default:
+               if (!+s[i]) break out;
+               if (i0 > 0) i0 = 0;
+               break;
            }
+         }
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             filter.push(['>=', 'capturedAt', toTimestamp]);
-           }
+         return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
+       }
 
-           if (_mlyViewer) {
-             _mlyViewer.setFilter(filter);
-           }
+       var $$5 = _export;
+       var uncurryThis$3 = functionUncurryThis;
+       var fails$3 = fails$V;
+       var thisNumberValue = thisNumberValue$3;
 
-           _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();
+       var un$ToPrecision = uncurryThis$3(1.0.toPrecision);
 
-           if (isHidden && _mlyViewer) {
-             wrap.selectAll('.photo-wrapper:not(.mly-wrapper)').classed('hide', true);
-             wrap.selectAll('.photo-wrapper.mly-wrapper').classed('hide', false);
+       var FORCED$1 = fails$3(function () {
+         // IE7-
+         return un$ToPrecision(1, undefined) !== '1';
+       }) || !fails$3(function () {
+         // V8 ~ Android 4.3-
+         un$ToPrecision({});
+       });
 
-             _mlyViewer.resize();
-           }
+       // `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);
+         }
+       });
 
-           return this;
-         },
-         hideViewer: function hideViewer(context) {
-           _mlyActiveImage = null;
-           _mlySelectedImageKey = null;
+       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!
+       }
 
-           if (!_mlyFallback && _mlyViewer) {
-             _mlyViewer.getComponent('sequence').stop();
-           }
+       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 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);
+       var formatTypes = {
+         "%": function _(x, p) {
+           return (x * 100).toFixed(p);
          },
-         parsePagination: parsePagination,
-         updateUrlImage: function updateUrlImage(imageKey) {
-           if (!window.mocha) {
-             var hash = utilStringQs(window.location.hash);
-
-             if (imageKey) {
-               hash.photo = 'mapillary/' + imageKey;
-             } else {
-               delete hash.photo;
-             }
-
-             window.location.replace('#' + utilQsString(hash, true));
-           }
+         "b": function b(x) {
+           return Math.round(x).toString(2);
          },
-         highlightDetection: function highlightDetection(detection) {
-           if (detection) {
-             _mlyHighlightedDetection = detection.detection_key;
-           }
-
-           return this;
+         "c": function c(x) {
+           return x + "";
          },
-         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
+         "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;
+       }
 
-           _mlyViewer = new Mapillary.Viewer('ideditor-mly', clientId, null, opts);
+       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 + "";
 
-           _mlyViewer.on('nodechanged', nodeChanged);
+         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".
 
-           _mlyViewer.on('bearingchanged', bearingChanged);
+           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.
 
-           if (_mlyViewerFilter) {
-             _mlyViewer.setFilter(_mlyViewerFilter);
-           } // Register viewer resize handler
+           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?
 
-           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.
-           //
+           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].
 
-           function nodeChanged(node) {
-             that.resetTags();
-             var clicks = _mlyClicks;
-             var index = clicks.indexOf(node.key);
-             var selectedKey = _mlySelectedImageKey;
-             that.setActiveImage(node);
+           precision = precision === undefined ? 6 : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision)) : Math.max(0, Math.min(20, precision));
 
-             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..
+           function format(value) {
+             var valuePrefix = prefix,
+                 valueSuffix = suffix,
+                 i,
+                 n,
+                 c;
 
-               if (node.key === selectedKey) {
-                 that.selectImage(context, _mlySelectedImageKey, true);
-               }
+             if (type === "c") {
+               valueSuffix = formatType(value) + valueSuffix;
+               value = "";
              } 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);
-             }
+               value = +value; // Determine the sign. -0 is not less than 0, but 1 / -0 is!
 
-             dispatch$4.call('nodeChanged');
-           }
+               var valueNegative = value < 0 || 1 / value < 0; // Perform the initial formatting.
 
-           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;
+               value = isNaN(value) ? nan : formatType(Math.abs(value), precision); // Trim insignificant zeros.
 
-           if (!fromViewer && imageKey) {
-             _mlyClicks.push(imageKey);
-           }
+               if (trim) value = formatTrim(value); // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
 
-           this.setStyles(context, null, true);
+               if (valueNegative && +value === 0 && sign !== "+") valueNegative = false; // Compute the prefix and suffix.
 
-           if (_mlyShowFeatureDetections) {
-             this.updateDetections(imageKey, apibase + 'image_detections?layers=points&values=' + mapFeatureConfig.values + '&image_keys=' + imageKey);
-           }
+               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 (_mlyShowSignDetections) {
-             this.updateDetections(imageKey, apibase + 'image_detections?layers=trafficsigns&image_keys=' + imageKey);
-           }
+               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.
 
-           if (_mlyViewer && imageKey) {
-             _mlyViewer.moveToKey(imageKey)["catch"](function (e) {
-               console.error('mly3', e);
-             }); // eslint-disable-line no-console
 
-           }
+             if (comma && !zero) value = group(value, Infinity); // Compute the padding.
 
-           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
-             };
-           } else {
-             _mlyActiveImage = null;
-           }
-         },
-         // 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);
-           }
+             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 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
+             if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; // Reconstruct the final output based on the desired alignment.
 
-           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
+             switch (align) {
+               case "<":
+                 value = valuePrefix + value + valueSuffix + padding;
+                 break;
 
-           context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
+               case "=":
+                 value = valuePrefix + padding + value + valueSuffix;
+                 break;
 
-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
+               case "^":
+                 value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length);
+                 break;
 
-             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';
+               default:
+                 value = padding + valuePrefix + value + valueSuffix;
+                 break;
              }
+
+             return numerals(value);
            }
 
-           return this;
-         },
-         updateDetections: function updateDetections(imageKey, url) {
-           if (!_mlyViewer || _mlyFallback) return;
-           if (!imageKey) return;
+           format.toString = function () {
+             return specifier + "";
+           };
 
-           if (!_mlyCache.image_detections.forImageKey[imageKey]) {
-             loadData('image_detections', url).then(function () {
-               showDetections(_mlyCache.image_detections.forImageKey[imageKey] || []);
-             });
-           } else {
-             showDetections(_mlyCache.image_detections.forImageKey[imageKey]);
-           }
+           return format;
+         }
 
-           function showDetections(detections) {
-             detections.forEach(function (data) {
-               var tag = makeTag(data);
+         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;
+           };
+         }
 
-               if (tag) {
-                 var tagComponent = _mlyViewer.getComponent('tag');
+         return {
+           format: newFormat,
+           formatPrefix: formatPrefix
+         };
+       }
 
-                 tagComponent.add([tag]);
-               }
-             });
-           }
+       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;
+       }
 
-           function makeTag(data) {
-             var valueParts = data.value.split('--');
-             if (!valueParts.length) return;
-             var tag;
-             var text;
-             var color = 0xffffff;
+       function precisionFixed (step) {
+         return Math.max(0, -exponent(Math.abs(step)));
+       }
 
-             if (_mlyHighlightedDetection === data.key) {
-               color = 0xffff00;
-               text = valueParts[1];
+       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 (text === 'flat' || text === 'discrete' || text === 'sign') {
-                 text = valueParts[2];
-               }
+       function precisionRound (step, max) {
+         step = Math.abs(step), max = Math.abs(max) - step;
+         return Math.max(0, exponent(max) - exponent(step)) + 1;
+       }
 
-               text = text.replace(/-/g, ' ');
-               text = text.charAt(0).toUpperCase() + text.slice(1);
-               _mlyHighlightedDetection = null;
+       function tickFormat(start, stop, count, specifier) {
+         var step = tickStep(start, stop, count),
+             precision;
+         specifier = formatSpecifier(specifier == null ? ",f" : specifier);
+
+         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);
              }
 
-             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
-               });
+           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;
              }
 
-             return tag;
-           }
-         },
-         cache: function cache() {
-           return _mlyCache;
+           case "f":
+           case "%":
+             {
+               if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
+               break;
+             }
          }
-       };
 
-       function validationIssue(attrs) {
-         this.type = attrs.type; // required - name of rule that created the issue (e.g. 'missing_tag')
+         return format$1(specifier);
+       }
 
-         this.subtype = attrs.subtype; // optional - category of the issue within the type (e.g. 'relation_type' under 'missing_tag')
+       function linearish(scale) {
+         var domain = scale.domain;
 
-         this.severity = attrs.severity; // required - 'warning' or 'error'
+         scale.ticks = function (count) {
+           var d = domain();
+           return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
+         };
 
-         this.message = attrs.message; // required - function returning localized string
+         scale.tickFormat = function (count, specifier) {
+           var d = domain();
+           return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
+         };
 
-         this.reference = attrs.reference; // optional - function(selection) to render reference information
+         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;
 
-         this.entityIds = attrs.entityIds; // optional - array of IDs of entities involved in the issue
+           if (stop < start) {
+             step = start, start = stop, stop = step;
+             step = i0, i0 = i1, i1 = step;
+           }
 
-         this.loc = attrs.loc; // optional - [lon, lat] to zoom in on to see the issue
+           while (maxIter-- > 0) {
+             step = tickIncrement(start, stop, count);
 
-         this.data = attrs.data; // optional - object containing extra data for the fixes
+             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;
+             }
 
-         this.dynamicFixes = attrs.dynamicFixes; // optional - function(context) returning fixes
+             prestep = step;
+           }
 
-         this.hash = attrs.hash; // optional - string to further differentiate the issue
+           return scale;
+         };
 
-         this.id = generateID.apply(this); // generated - see below
+         return scale;
+       }
+       function linear() {
+         var scale = continuous();
 
-         this.autoFix = null; // generated - if autofix exists, will be set below
-         // A unique, deterministic string hash.
-         // Issues with identical id values are considered identical.
+         scale.copy = function () {
+           return copy(scale, linear());
+         };
 
-         function generateID() {
-           var parts = [this.type];
+         initRange.apply(scale, arguments);
+         return linearish(scale);
+       }
 
-           if (this.hash) {
-             // subclasses can pass in their own differentiator
-             parts.push(this.hash);
-           }
+       // eslint-disable-next-line es/no-math-expm1 -- safe
+       var $expm1 = Math.expm1;
+       var exp$1 = Math.exp;
+
+       // `Math.expm1` method implementation
+       // https://tc39.es/ecma262/#sec-math.expm1
+       var mathExpm1 = (!$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;
 
-           if (this.subtype) {
-             parts.push(this.subtype);
-           } // include the entities this issue is for
-           // (sort them so the id is deterministic)
+         function scale(x) {
+           return x != null && x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
+         }
 
+         function rescale() {
+           var i = -1;
+           domain = new Array(n);
 
-           if (this.entityIds) {
-             var entityKeys = this.entityIds.slice().sort();
-             parts.push.apply(parts, entityKeys);
+           while (++i < n) {
+             domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
            }
 
-           return parts.join(':');
+           return scale;
          }
 
-         this.extent = function (resolver) {
-           if (this.loc) {
-             return geoExtent(this.loc);
-           }
-
-           if (this.entityIds && this.entityIds.length) {
-             return this.entityIds.reduce(function (extent, entityId) {
-               return extent.extend(resolver.entity(entityId).extent(resolver));
-             }, geoExtent());
-           }
+         scale.domain = function (_) {
+           var _ref, _ref2;
 
-           return null;
+           return arguments.length ? ((_ref = _, _ref2 = _slicedToArray(_ref, 2), x0 = _ref2[0], x1 = _ref2[1], _ref), x0 = +x0, x1 = +x1, rescale()) : [x0, x1];
          };
 
-         this.fixes = function (context) {
-           var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
-           var issue = this;
+         scale.range = function (_) {
+           return arguments.length ? (n = (range = Array.from(_)).length - 1, rescale()) : range.slice();
+         };
 
-           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);
-               }
-             }));
-           }
+         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]];
+         };
 
-           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
+         scale.unknown = function (_) {
+           return arguments.length ? (unknown = _, scale) : scale;
+         };
 
-             fix.issue = issue;
+         scale.thresholds = function () {
+           return domain.slice();
+         };
 
-             if (fix.autoArgs) {
-               issue.autoFix = fix;
-             }
-           });
-           return fixes;
+         scale.copy = function () {
+           return quantize().domain([x0, x1]).range(range).unknown(unknown);
          };
+
+         return initRange.apply(linearish(scale), arguments);
        }
-       function validationIssueFix(attrs) {
-         this.title = attrs.title; // Required
 
-         this.onClick = attrs.onClick; // Optional - the function to run to apply the fix
+       var global$3 = global$1o;
+       var uncurryThis$2 = functionUncurryThis;
+       var fails$2 = fails$V;
+       var padStart = stringPad.start;
 
-         this.disabledReason = attrs.disabledReason; // Optional - a string explaining why the fix is unavailable, if any
+       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);
 
-         this.icon = attrs.icon; // Optional - shows 'iD-icon-wrench' if not set
+       // `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;
 
-         this.entityIds = attrs.entityIds || []; // Optional - used for hover-higlighting.
+       var $$4 = _export;
+       var toISOString = dateToIsoString;
 
-         this.autoArgs = attrs.autoArgs; // Optional - pass [actions, annotation] arglist if this fix can automatically run
+       // `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
+       });
 
-         this.issue = null; // Generated link - added by validationIssue
-       }
+       function behaviorBreathe() {
+         var duration = 800;
+         var steps = 4;
+         var selector = '.selected.shadow, .selected .shadow';
 
-       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];
+         var _selected = select(null);
 
-             var expression = _positiveRegex[tagKey].join('|');
+         var _classed = '';
+         var _params = {};
+         var _done = false;
 
-             var regex = new RegExp(expression);
-             return function (tags) {
-               return regex.test(tags[tagKey]);
-             };
-           },
-           negativeRegex: function negativeRegex(_negativeRegex) {
-             var tagKey = Object.keys(_negativeRegex)[0];
+         var _timer;
 
-             var expression = _negativeRegex[tagKey].join('|');
+         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 || '');
+           };
+         }
 
-             var regex = new RegExp(expression);
-             return function (tags) {
-               return !regex.test(tags[tagKey]);
-             };
-           }
-         };
-       };
+         function reset(selection) {
+           selection.style('stroke-opacity', null).style('stroke-width', null).style('fill-opacity', null).style('r', null);
+         }
 
-       var buildLineKeys = function buildLineKeys() {
-         return {
-           highway: {
-             rest_area: true,
-             services: true
-           },
-           railway: {
-             roundhouse: true,
-             station: true,
-             traverser: true,
-             turntable: true,
-             wash: true
-           }
-         };
-       };
+         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');
+           });
+         }
 
-       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]));
-             }
+         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
 
-             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, '');
-             });
-           };
+             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..
 
-           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]);
+             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;
+           });
+         }
 
-                 if (expectedTags.hasOwnProperty(selectorKey)) {
-                   values = values.concat(expectedTags[selectorKey]);
-                 }
+         function run(surface, fromTo) {
+           var toFrom = fromTo === 'from' ? 'to' : 'from';
+           var currSelected = surface.selectAll(selector);
+           var currClassed = surface.attr('class');
 
-                 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 (_done || currSelected.empty()) {
+             _selected.call(reset);
 
-               if (expectedTags.hasOwnProperty(tagKey)) {
-                 values = values.concat(expectedTags[tagKey]);
-               }
+             _selected = select(null);
+             return;
+           }
 
-               expectedTags[tagKey] = values;
-             }
+           if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
+             _selected.call(reset);
 
-             return expectedTags;
-           }, {});
-           return tagMap;
-         },
-         // inspired by osmWay#isArea()
-         inferGeometry: function inferGeometry(tagMap) {
-           var _lineKeys = this._lineKeys;
-           var _areaKeys = this._areaKeys;
+             _classed = currClassed;
+             _selected = currSelected.call(calcAnimationParams);
+           }
 
-           var keyValueDoesNotImplyArea = function keyValueDoesNotImplyArea(key) {
-             return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
-           };
+           var didCallNextRun = false;
 
-           var keyValueImpliesLine = function keyValueImpliesLine(key) {
-             return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
-           };
+           _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
 
-           if (tagMap.hasOwnProperty('area')) {
-             if (tagMap.area.indexOf('yes') > -1) {
-               return 'area';
-             }
 
-             if (tagMap.area.indexOf('no') > -1) {
-               return 'line';
+             if (!select(this).classed('selected')) {
+               reset(select(this));
              }
-           }
+           });
+         }
 
-           for (var key in tagMap) {
-             if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
-               return 'area';
+         function behavior(surface) {
+           _done = false;
+           _timer = timer(function () {
+             // wait for elements to actually become selected
+             if (surface.selectAll(selector).empty()) {
+               return false;
              }
 
-             if (key in _lineKeys && keyValueImpliesLine(key)) {
-               return 'area';
-             }
-           }
+             surface.call(run, 'from');
 
-           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]
-                 }));
-               }
-             }
-           };
+             _timer.stop();
 
-           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 true;
+           }, 20);
          }
-       };
-
-       var apibase$1 = 'https://nominatim.openstreetmap.org/';
-       var _inflight = {};
 
-       var _nominatimCache;
+         behavior.restartIfNeeded = function (surface) {
+           if (_selected.empty()) {
+             surface.call(run, 'from');
 
-       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);
+             if (_timer) {
+               _timer.stop();
              }
-           });
-         },
-         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;
+         behavior.off = function () {
+           _done = true;
+
+           if (_timer) {
+             _timer.stop();
            }
 
-           var params = {
-             zoom: 13,
-             format: 'json',
-             addressdetails: 1,
-             lat: loc[1],
-             lon: loc[0]
-           };
-           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];
+           _selected.interrupt().call(reset);
+         };
 
-             if (result && result.error) {
-               throw new Error(result.error);
-             }
+         return behavior;
+       }
 
-             var extent = geoExtent(loc).padByMeters(200);
+       /* Creates a keybinding behavior for an operation */
+       function behaviorOperation(context) {
+         var _operation;
 
-             _nominatimCache.insert(Object.assign(extent.bbox(), {
-               data: result
-             }));
+         function keypress(d3_event) {
+           // prevent operations during low zoom selection
+           if (!context.map().withinEditableZoom()) return;
+           if (_operation.availableForKeypress && !_operation.availableForKeypress()) return;
+           d3_event.preventDefault();
 
-             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];
+           var disabled = _operation.disabled();
 
-             if (result && result.error) {
-               throw new Error(result.error);
-             }
+           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);
 
-             if (callback) callback(null, result);
-           })["catch"](function (err) {
-             delete _inflight[url];
-             if (err.name === 'AbortError') return;
-             if (callback) callback(err.message);
-           });
+             _operation();
+           }
          }
-       };
 
-       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]);
+         function behavior() {
+           if (_operation && _operation.available()) {
+             context.keybinding().on(_operation.keys, keypress);
+           }
 
-       var _oscCache;
+           return behavior;
+         }
 
-       var _oscSelectedImage;
+         behavior.off = function () {
+           context.keybinding().off(_operation.keys);
+         };
 
-       var _loadViewerPromise$1;
+         behavior.which = function (_) {
+           if (!arguments.length) return _operation;
+           _operation = _;
+           return behavior;
+         };
 
-       function abortRequest$4(controller) {
-         controller.abort();
+         return behavior;
        }
 
-       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;
-       }
+       function operationCircularize(context, selectedIDs) {
+         var _extent;
 
-       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
+         var _actions = selectedIDs.map(getAction).filter(Boolean);
 
-         var cache = _oscCache[which];
-         Object.keys(cache.inflight).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k.indexOf(tile.id + ',') === 0;
-           });
+         var _amount = _actions.length === 1 ? 'single' : 'multiple';
 
-           if (!wanted) {
-             abortRequest$4(cache.inflight[k]);
-             delete cache.inflight[k];
-           }
-         });
-         tiles.forEach(function (tile) {
-           loadNextTilePage$1(which, currZoom, url, tile);
+         var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
+           return n.loc;
          });
-       }
 
-       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'
-           }
-         };
-         d3_json(url, options).then(function (data) {
-           cache.loaded[id] = true;
-           delete cache.inflight[id];
+         function getAction(entityID) {
+           var entity = context.entity(entityID);
+           if (entity.type !== 'way' || new Set(entity.nodes).size <= 1) return null;
 
-           if (!data || !data.currentPageItems || !data.currentPageItems.length) {
-             throw new Error('No Data');
+           if (!_extent) {
+             _extent = entity.extent(context.graph());
+           } else {
+             _extent = _extent.extend(entity.extent(context.graph()));
            }
 
-           var features = data.currentPageItems.map(function (item) {
-             var loc = [+item.lng, +item.lat];
-             var d;
-
-             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
+           return actionCircularize(entityID, context.projection);
+         }
 
-               var seq = _oscCache.sequences[d.sequence_id];
+         var operation = function operation() {
+           if (!_actions.length) return;
 
-               if (!seq) {
-                 seq = {
-                   rotation: 0,
-                   images: []
-                 };
-                 _oscCache.sequences[d.sequence_id] = seq;
+           var combinedAction = function combinedAction(graph, t) {
+             _actions.forEach(function (action) {
+               if (!action.disabled(graph)) {
+                 graph = action(graph, t);
                }
+             });
 
-               seq.images[d.sequence_index] = d;
-               _oscCache.images.forImageKey[d.key] = d; // cache imageKey -> image
-             }
+             return graph;
+           };
 
-             return {
-               minX: loc[0],
-               minY: loc[1],
-               maxX: loc[0],
-               maxY: loc[1],
-               data: d
-             };
-           });
-           cache.rtree.load(features);
+           combinedAction.transitionable = true;
+           context.perform(combinedAction, operation.annotation());
+           window.setTimeout(function () {
+             context.validator().validate();
+           }, 300); // after any transition
+         };
 
-           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
-           }
+         operation.available = function () {
+           return _actions.length && selectedIDs.length === _actions.length;
+         }; // don't cache this because the visible extent could change
 
-           if (which === 'images') {
-             dispatch$5.call('loadedImages');
-           }
-         })["catch"](function () {
-           cache.loaded[id] = true;
-           delete cache.inflight[id];
-         });
-       } // partition viewport into higher zoom tiles
 
+         operation.disabled = function () {
+           if (!_actions.length) return '';
 
-       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 actionDisableds = _actions.map(function (action) {
+             return action.disabled(context.graph());
+           }).filter(Boolean);
 
-         var tiler = utilTiler().zoomExtent([z2, z2]);
-         return tiler.getTiles(projection).map(function (tile) {
-           return tile.extent;
-         });
-       } // no more than `limit` results per partition.
+           if (actionDisableds.length === _actions.length) {
+             // none of the features can be circularized
+             if (new Set(actionDisableds).size > 1) {
+               return 'multiple_blockers';
+             }
 
+             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';
+           }
 
-       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;
-         }, []);
-       }
+           return false;
 
-       var serviceOpenstreetcam = {
-         init: function init() {
-           if (!_oscCache) {
-             this.reset();
-           }
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
-           this.event = utilRebind(this, dispatch$5, 'on');
-         },
-         reset: function reset() {
-           if (_oscCache) {
-             Object.values(_oscCache.images.inflight).forEach(abortRequest$4);
+             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 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
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.circularize.' + disable + '.' + _amount) : _t('operations.circularize.description.' + _amount);
+         };
 
-           _oscCache.images.rtree.search(bbox).forEach(function (d) {
-             sequenceKeys[d.data.sequence_id] = true;
-           }); // make linestrings from those sequences
+         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;
+       }
 
-           var lineStrings = [];
-           Object.keys(sequenceKeys).forEach(function (sequenceKey) {
-             var seq = _oscCache.sequences[sequenceKey];
-             var images = seq && seq.images;
+       // For example, ⌘Z -> Ctrl+Z
 
-             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
+       var uiCmd = function uiCmd(code) {
+         var detected = utilDetect();
 
-           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
+         if (detected.os === 'mac') {
+           return code;
+         }
 
-           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);
-           });
+         if (detected.os === 'win') {
+           if (code === '⌘⇧Z') return 'Ctrl+Y';
+         }
 
-           function zoomPan(d3_event) {
-             var t = d3_event.transform;
-             context.container().select('.photoviewer .osc-image-wrap').call(utilSetTransform, t.x, t.y, t.k);
-           }
+         var result = '',
+             replacements = {
+           '⌘': 'Ctrl',
+           '⇧': 'Shift',
+           '⌥': 'Alt',
+           '⌫': 'Backspace',
+           '⌦': 'Delete'
+         };
 
-           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)');
-             };
+         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];
            }
+         }
 
-           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
+         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;
+       };
 
-           _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();
+       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());
 
-           if (isHidden) {
-             viewer.selectAll('.photo-wrapper:not(.osc-wrapper)').classed('hide', true);
-             viewer.selectAll('.photo-wrapper.osc-wrapper').classed('hide', false);
-           }
+         var operation = function operation() {
+           var nextSelectedID;
+           var nextSelectedLoc;
 
-           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();
+           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.
 
-           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)');
+             if (geometry === 'vertex') {
+               var nodes = parent.nodes;
+               var i = nodes.indexOf(id);
 
-             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 (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 (d.captured_at) {
-               attribution.append('span').attr('class', 'captured_at').html(localeDateString(d.captured_at));
-               attribution.append('span').html('|');
+               nextSelectedID = nodes[i];
+               nextSelectedLoc = context.entity(nextSelectedID).loc;
              }
-
-             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');
            }
 
-           return this;
+           context.perform(action, operation.annotation());
+           context.validator().validate();
 
-           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);
+           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));
            }
+         };
 
-           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
+         operation.available = function () {
+           return true;
+         };
 
-           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
+         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';
+           }
+
+           return false;
 
-           context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
+             if (osm) {
+               var missing = coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-             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';
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
              }
-           }
 
-           return this;
-         },
-         updateUrlImage: function updateUrlImage(imageKey) {
-           if (!window.mocha) {
-             var hash = utilStringQs(window.location.hash);
+             return false;
+           }
 
-             if (imageKey) {
-               hash.photo = 'openstreetcam/' + imageKey;
-             } else {
-               delete hash.photo;
-             }
+           function hasWikidataTag(id) {
+             var entity = context.entity(id);
+             return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+           }
 
-             window.location.replace('#' + utilQsString(hash, true));
+           function incompleteRelation(id) {
+             var entity = context.entity(id);
+             return entity.type === 'relation' && !entity.isComplete(context.graph());
            }
-         },
-         cache: function cache() {
-           return _oscCache;
-         }
-       };
 
-       var FORCED$f = fails(function () {
-         return new Date(NaN).toJSON() !== null
-           || Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;
-       });
+           function protectedMember(id) {
+             var entity = context.entity(id);
+             if (entity.type !== 'way') return false;
+             var parents = context.graph().parentRelations(entity);
 
-       // `Date.prototype.toJSON` method
-       // https://tc39.es/ecma262/#sec-date.prototype.tojson
-       _export({ target: 'Date', proto: true, forced: FORCED$f }, {
-         // eslint-disable-next-line no-unused-vars -- required for `.length`
-         toJSON: function toJSON(key) {
-           var O = toObject(this);
-           var pv = toPrimitive(O);
-           return typeof pv == 'number' && !isFinite(pv) ? null : O.toISOString();
-         }
-       });
+             for (var i = 0; i < parents.length; i++) {
+               var parent = parents[i];
+               var type = parent.tags.type;
+               var role = parent.memberById(id).role || 'outer';
 
-       // `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);
-         }
-       });
+               if (type === 'route' || type === 'boundary' || type === 'multipolygon' && role === 'outer') {
+                 return true;
+               }
+             }
 
-       /**
-        * 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 false;
+           }
+         };
 
-         return value != null && (type == 'object' || type == 'function');
-       }
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.delete.' + disable + '.' + multi) : _t('operations.delete.description.' + multi);
+         };
 
-       /** Detect free variable `global` from Node.js. */
-       var freeGlobal = (typeof global === "undefined" ? "undefined" : _typeof(global)) == 'object' && global && global.Object === Object && global;
+         operation.annotation = function () {
+           return selectedIDs.length === 1 ? _t('operations.delete.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.delete.annotation.feature', {
+             n: selectedIDs.length
+           });
+         };
 
-       /** Detect free variable `self`. */
+         operation.id = 'delete';
+         operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
+         operation.title = _t('operations.delete.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-       var freeSelf = (typeof self === "undefined" ? "undefined" : _typeof(self)) == 'object' && self && self.Object === Object && self;
-       /** Used as a reference to the global object. */
+       function operationOrthogonalize(context, selectedIDs) {
+         var _extent;
 
-       var root$1 = freeGlobal || freeSelf || Function('return this')();
+         var _type;
 
-       /**
-        * 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 _actions = selectedIDs.map(chooseAction).filter(Boolean);
 
-       var now$1 = function now() {
-         return root$1.Date.now();
-       };
+         var _amount = _actions.length === 1 ? 'single' : 'multiple';
 
-       /** 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.
-        */
+         var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
+           return n.loc;
+         });
 
-       function trimmedEndIndex(string) {
-         var index = string.length;
+         function chooseAction(entityID) {
+           var entity = context.entity(entityID);
+           var geometry = entity.geometry(context.graph());
 
-         while (index-- && reWhitespace.test(string.charAt(index))) {}
+           if (!_extent) {
+             _extent = entity.extent(context.graph());
+           } else {
+             _extent = _extent.extend(entity.extent(context.graph()));
+           } // square a line/area
 
-         return index;
-       }
 
-       /** Used to match leading whitespace. */
+           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);
 
-       var reTrimStart = /^\s+/;
-       /**
-        * The base implementation of `_.trim`.
-        *
-        * @private
-        * @param {string} string The string to trim.
-        * @returns {string} Returns the trimmed string.
-        */
+             if (parents.length === 1) {
+               var way = parents[0];
 
-       function baseTrim(string) {
-         return string ? string.slice(0, trimmedEndIndex(string) + 1).replace(reTrimStart, '') : string;
-       }
+               if (way.nodes.indexOf(entityID) !== -1) {
+                 return actionOrthogonalize(way.id, context.projection, entityID);
+               }
+             }
+           }
 
-       /** Built-in value references. */
+           return null;
+         }
 
-       var _Symbol = root$1.Symbol;
+         var operation = function operation() {
+           if (!_actions.length) return;
 
-       /** Used for built-in method references. */
+           var combinedAction = function combinedAction(graph, t) {
+             _actions.forEach(function (action) {
+               if (!action.disabled(graph)) {
+                 graph = action(graph, t);
+               }
+             });
 
-       var objectProto = Object.prototype;
-       /** Used to check objects for own properties. */
+             return graph;
+           };
 
-       var hasOwnProperty$1 = objectProto.hasOwnProperty;
-       /**
-        * Used to resolve the
-        * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
-        * of values.
-        */
+           combinedAction.transitionable = true;
+           context.perform(combinedAction, operation.annotation());
+           window.setTimeout(function () {
+             context.validator().validate();
+           }, 300); // after any transition
+         };
 
-       var nativeObjectToString = objectProto.toString;
-       /** Built-in value references. */
+         operation.available = function () {
+           return _actions.length && selectedIDs.length === _actions.length;
+         }; // don't cache this because the visible extent could change
 
-       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`.
-        */
 
-       function getRawTag(value) {
-         var isOwn = hasOwnProperty$1.call(value, symToStringTag),
-             tag = value[symToStringTag];
+         operation.disabled = function () {
+           if (!_actions.length) return '';
 
-         try {
-           value[symToStringTag] = undefined;
-           var unmasked = true;
-         } catch (e) {}
+           var actionDisableds = _actions.map(function (action) {
+             return action.disabled(context.graph());
+           }).filter(Boolean);
 
-         var result = nativeObjectToString.call(value);
+           if (actionDisableds.length === _actions.length) {
+             // none of the features can be squared
+             if (new Set(actionDisableds).size > 1) {
+               return 'multiple_blockers';
+             }
 
-         if (unmasked) {
-           if (isOwn) {
-             value[symToStringTag] = tag;
-           } else {
-             delete value[symToStringTag];
+             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';
            }
-         }
-
-         return result;
-       }
 
-       /** 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.
-        */
+           return false;
 
-       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 someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
-       function objectToString$1(value) {
-         return nativeObjectToString$1.call(value);
-       }
+             if (osm) {
+               var missing = _coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-       /** `Object#toString` result references. */
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
+             }
 
-       var nullTag = '[object Null]',
-           undefinedTag = '[object Undefined]';
-       /** Built-in value references. */
+             return false;
+           }
+         };
 
-       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`.
-        */
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.orthogonalize.' + disable + '.' + _amount) : _t('operations.orthogonalize.description.' + _type + '.' + _amount);
+         };
 
-       function baseGetTag(value) {
-         if (value == null) {
-           return value === undefined ? undefinedTag : nullTag;
-         }
+         operation.annotation = function () {
+           return _t('operations.orthogonalize.annotation.' + _type, {
+             n: _actions.length
+           });
+         };
 
-         return symToStringTag$1 && symToStringTag$1 in Object(value) ? getRawTag(value) : objectToString$1(value);
+         operation.id = 'orthogonalize';
+         operation.keys = [_t('operations.orthogonalize.key')];
+         operation.title = _t('operations.orthogonalize.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
        }
 
-       /**
-        * 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';
+       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());
 
-       /** `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
-        */
+         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
+         };
 
-       function isSymbol$1(value) {
-         return _typeof(value) == 'symbol' || isObjectLike(value) && baseGetTag(value) == symbolTag;
-       }
+         operation.available = function () {
+           return nodes.length >= 3;
+         }; // don't cache this because the visible extent could change
 
-       /** Used as references for various `Number` constants. */
 
-       var NAN = 0 / 0;
-       /** Used to detect bad signed hexadecimal string values. */
+         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 reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
-       /** Used to detect binary string values. */
+           return false;
 
-       var reIsBinary = /^0b[01]+$/i;
-       /** Used to detect octal string values. */
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
-       var reIsOctal = /^0o[0-7]+$/i;
-       /** Built-in method references without a dependency on `root`. */
+             if (osm) {
+               var missing = coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-       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
-        */
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
+             }
 
-       function toNumber$1(value) {
-         if (typeof value == 'number') {
-           return value;
-         }
+             return false;
+           }
 
-         if (isSymbol$1(value)) {
-           return NAN;
-         }
+           function incompleteRelation(id) {
+             var entity = context.entity(id);
+             return entity.type === 'relation' && !entity.isComplete(context.graph());
+           }
+         };
 
-         if (isObject$1(value)) {
-           var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
-           value = isObject$1(other) ? other + '' : other;
-         }
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.reflect.' + disable + '.' + multi) : _t('operations.reflect.description.' + axis + '.' + multi);
+         };
 
-         if (typeof value != 'string') {
-           return value === 0 ? value : +value;
-         }
+         operation.annotation = function () {
+           return _t('operations.reflect.annotation.' + axis + '.feature', {
+             n: selectedIDs.length
+           });
+         };
 
-         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;
+         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;
        }
 
-       /** Error message constants. */
+       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());
+
+         var operation = function operation() {
+           context.enter(modeMove(context, selectedIDs));
+         };
+
+         operation.available = function () {
+           return selectedIDs.length > 0;
+         };
+
+         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;
 
-       var FUNC_ERROR_TEXT = 'Expected a function';
-       /* Built-in method references for those with the same name as other `lodash` methods. */
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
-       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);
-        */
+             if (osm) {
+               var missing = coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-       function debounce(func, wait, options) {
-         var lastArgs,
-             lastThis,
-             maxWait,
-             result,
-             timerId,
-             lastCallTime,
-             lastInvokeTime = 0,
-             leading = false,
-             maxing = false,
-             trailing = true;
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
+             }
 
-         if (typeof func != 'function') {
-           throw new TypeError(FUNC_ERROR_TEXT);
-         }
+             return false;
+           }
 
-         wait = toNumber$1(wait) || 0;
+           function incompleteRelation(id) {
+             var entity = context.entity(id);
+             return entity.type === 'relation' && !entity.isComplete(context.graph());
+           }
+         };
 
-         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;
-         }
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.move.' + disable + '.' + multi) : _t('operations.move.description.' + multi);
+         };
 
-         function invokeFunc(time) {
-           var args = lastArgs,
-               thisArg = lastThis;
-           lastArgs = lastThis = undefined;
-           lastInvokeTime = time;
-           result = func.apply(thisArg, args);
-           return result;
-         }
+         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 leadingEdge(time) {
-           // Reset any `maxWait` timer.
-           lastInvokeTime = time; // Start the timer for the trailing edge.
+         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;
+       }
 
-           timerId = setTimeout(timerExpired, wait); // Invoke the leading edge.
+       function modeRotate(context, entityIDs) {
+         var _tolerancePx = 4; // see also behaviorDrag, behaviorSelect, modeMove
 
-           return leading ? invokeFunc(time) : result;
-         }
+         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
+         });
 
-         function remainingWait(time) {
-           var timeSinceLastCall = time - lastCallTime,
-               timeSinceLastInvoke = time - lastInvokeTime,
-               timeWaiting = wait - timeSinceLastCall;
-           return maxing ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) : timeWaiting;
-         }
+         var _prevGraph;
 
-         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.
+         var _prevAngle;
 
-           return lastCallTime === undefined || timeSinceLastCall >= wait || timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;
-         }
+         var _prevTransform;
 
-         function timerExpired() {
-           var time = now$1();
+         var _pivot; // use pointer events on supported platforms; fallback to mouse events
 
-           if (shouldInvoke(time)) {
-             return trailingEdge(time);
-           } // Restart the timer.
 
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-           timerId = setTimeout(timerExpired, remainingWait(time));
-         }
+         function doRotate(d3_event) {
+           var fn;
 
-         function trailingEdge(time) {
-           timerId = undefined; // Only invoke if we have `lastArgs` which means `func` has been
-           // debounced at least once.
+           if (context.graph() !== _prevGraph) {
+             fn = context.perform;
+           } else {
+             fn = context.replace;
+           } // projection changed, recalculate _pivot
 
-           if (trailing && lastArgs) {
-             return invokeFunc(time);
-           }
 
-           lastArgs = lastThis = undefined;
-           return result;
-         }
+           var projection = context.projection;
+           var currTransform = projection.transform();
 
-         function cancel() {
-           if (timerId !== undefined) {
-             clearTimeout(timerId);
+           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;
            }
 
-           lastInvokeTime = 0;
-           lastArgs = lastCallTime = lastThis = timerId = undefined;
-         }
-
-         function flush() {
-           return timerId === undefined ? result : trailingEdge(now$1());
+           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 debounced() {
-           var time = now$1(),
-               isInvoking = shouldInvoke(time);
-           lastArgs = arguments;
-           lastThis = this;
-           lastCallTime = time;
+         function getPivot(points) {
+           var _pivot;
 
-           if (isInvoking) {
-             if (timerId === undefined) {
-               return leadingEdge(lastCallTime);
-             }
+           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 (maxing) {
-               // Handle invocations in a tight loop.
-               clearTimeout(timerId);
-               timerId = setTimeout(timerExpired, wait);
-               return invokeFunc(lastCallTime);
+             if (polygonHull.length === 2) {
+               _pivot = geoVecInterp(points[0], points[1], 0.5);
+             } else {
+               _pivot = d3_polygonCentroid(d3_polygonHull(points));
              }
            }
 
-           if (timerId === undefined) {
-             timerId = setTimeout(timerExpired, wait);
-           }
-
-           return result;
+           return _pivot;
          }
 
-         debounced.cancel = cancel;
-         debounced.flush = flush;
-         return debounced;
-       }
-
-       /** Error message constants. */
-
-       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);
-        */
+         function finish(d3_event) {
+           d3_event.stopPropagation();
+           context.replace(actionNoop(), annotation);
+           context.enter(modeSelect(context, entityIDs));
+         }
 
-       function throttle(func, wait, options) {
-         var leading = true,
-             trailing = true;
+         function cancel() {
+           if (_prevGraph) context.pop(); // remove the rotate
 
-         if (typeof func != 'function') {
-           throw new TypeError(FUNC_ERROR_TEXT$1);
+           context.enter(modeSelect(context, entityIDs));
          }
 
-         if (isObject$1(options)) {
-           leading = 'leading' in options ? !!options.leading : leading;
-           trailing = 'trailing' in options ? !!options.trailing : trailing;
+         function undone() {
+           context.enter(modeBrowse(context));
          }
 
-         return debounce(func, wait, {
-           'leading': leading,
-           'maxWait': wait,
-           'trailing': trailing
-         });
-       }
+         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);
+         };
 
-       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;
+         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([]);
+         };
 
-           function utf8Encode(str) {
-             var x,
-                 y,
-                 output = '',
-                 i = -1,
-                 l;
+         mode.selectedIDs = function () {
+           if (!arguments.length) return entityIDs; // no assign
 
-             if (str && str.length) {
-               l = str.length;
+           return mode;
+         };
 
-               while ((i += 1) < l) {
-                 /* Decode utf-16 surrogate pairs */
-                 x = str.charCodeAt(i);
-                 y = i + 1 < l ? str.charCodeAt(i + 1) : 0;
+         return mode;
+       }
 
-                 if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
-                   x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
-                   i += 1;
-                 }
-                 /* Encode output as utf-8 */
+       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());
 
+         var operation = function operation() {
+           context.enter(modeRotate(context, selectedIDs));
+         };
 
-                 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);
-                 }
-               }
-             }
+         operation.available = function () {
+           return nodes.length >= 2;
+         };
 
-             return output;
+         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 utf8Decode(str) {
-             var i,
-                 ac,
-                 c1,
-                 c2,
-                 c3,
-                 arr = [],
-                 l;
-             i = ac = c1 = c2 = c3 = 0;
+           return false;
 
-             if (str && str.length) {
-               l = str.length;
-               str += '';
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
-               while (i < l) {
-                 c1 = str.charCodeAt(i);
-                 ac += 1;
+             if (osm) {
+               var missing = coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-                 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 (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
                }
              }
 
-             return arr.join('');
+             return false;
            }
-           /**
-            * Add integers, wrapping at 2^32. This uses 16-bit operations internally
-            * to work around bugs in some JS interpreters.
-            */
 
-
-           function safe_add(x, y) {
-             var lsw = (x & 0xFFFF) + (y & 0xFFFF),
-                 msw = (x >> 16) + (y >> 16) + (lsw >> 16);
-             return msw << 16 | lsw & 0xFFFF;
+           function incompleteRelation(id) {
+             var entity = context.entity(id);
+             return entity.type === 'relation' && !entity.isComplete(context.graph());
            }
-           /**
-            * Bitwise rotate a 32-bit number to the left.
-            */
+         };
+
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.rotate.' + disable + '.' + multi) : _t('operations.rotate.description.' + multi);
+         };
 
+         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 bit_rol(num, cnt) {
-             return num << cnt | num >>> 32 - cnt;
-           }
-           /**
-            * Convert a raw string to a hex string
-            */
+         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 _tolerancePx = 4; // see also behaviorDrag, behaviorSelect, modeRotate
 
-           function rstr2hex(input, hexcase) {
-             var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
-                 output = '',
-                 x,
-                 i = 0,
-                 l = input.length;
+         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
+         });
 
-             for (; i < l; i += 1) {
-               x = input.charCodeAt(i);
-               output += hex_tab.charAt(x >>> 4 & 0x0F) + hex_tab.charAt(x & 0x0F);
-             }
+         var _prevGraph;
 
-             return output;
-           }
-           /**
-            * Convert an array of big-endian words to a string
-            */
+         var _cache;
 
+         var _origin;
 
-           function binb2rstr(input) {
-             var i,
-                 l = input.length * 32,
-                 output = '';
+         var _nudgeInterval; // use pointer events on supported platforms; fallback to mouse events
 
-             for (i = 0; i < l; i += 8) {
-               output += String.fromCharCode(input[i >> 5] >>> 24 - i % 32 & 0xFF);
-             }
 
-             return output;
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+
+         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;
            }
-           /**
-            * Convert an array of little-endian words to a string
-            */
 
+           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 binl2rstr(input) {
-             var i,
-                 l = input.length * 32,
-                 output = '';
+         function startNudge(nudge) {
+           if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+           _nudgeInterval = window.setInterval(function () {
+             context.map().pan(nudge);
+             doMove(nudge);
+           }, 50);
+         }
 
-             for (i = 0; i < l; i += 8) {
-               output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
-             }
+         function stopNudge() {
+           if (_nudgeInterval) {
+             window.clearInterval(_nudgeInterval);
+             _nudgeInterval = null;
+           }
+         }
 
-             return output;
+         function move() {
+           doMove();
+           var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());
+
+           if (nudge) {
+             startNudge(nudge);
+           } else {
+             stopNudge();
            }
-           /**
-            * Convert a raw string to an array of little-endian words
-            * Characters >255 have their high-byte silently ignored.
-            */
+         }
 
+         function finish(d3_event) {
+           d3_event.stopPropagation();
+           context.replace(actionNoop(), annotation);
+           context.enter(modeSelect(context, entityIDs));
+           stopNudge();
+         }
 
-           function rstr2binl(input) {
-             var i,
-                 l = input.length * 8,
-                 output = Array(input.length >> 2),
-                 lo = output.length;
+         function cancel() {
+           if (baseGraph) {
+             while (context.graph() !== baseGraph) {
+               context.pop();
+             } // reset to baseGraph
 
-             for (i = 0; i < lo; i += 1) {
-               output[i] = 0;
-             }
 
-             for (i = 0; i < l; i += 8) {
-               output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << i % 32;
-             }
+             context.enter(modeBrowse(context));
+           } else {
+             if (_prevGraph) context.pop(); // remove the move
 
-             return output;
+             context.enter(modeSelect(context, entityIDs));
            }
-           /**
-            * 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;
+           stopNudge();
+         }
 
-             for (i = 0; i < lo; i += 1) {
-               output[i] = 0;
-             }
+         function undone() {
+           context.enter(modeBrowse(context));
+         }
 
-             for (i = 0; i < l; i += 8) {
-               output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << 24 - i % 32;
-             }
+         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);
+         };
 
-             return output;
-           }
-           /**
-            * Convert a raw string to an arbitrary string encoding
-            */
+         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([]);
+         };
 
+         mode.selectedIDs = function () {
+           if (!arguments.length) return entityIDs; // no assign
 
-           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 */
+           return mode;
+         };
 
-             dividend = Array(Math.ceil(input.length / 2));
-             ld = dividend.length;
+         return mode;
+       }
 
-             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 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);
+           });
 
+           for (var id in copies) {
+             var oldEntity = oldGraph.entity(id);
+             var newEntity = copies[id];
 
-             while (dividend.length > 0) {
-               quotient = Array();
-               x = 0;
+             extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
 
-               for (i = 0; i < dividend.length; i += 1) {
-                 x = (x << 16) + dividend[i];
-                 q = Math.floor(x / divisor);
-                 x -= q * divisor;
 
-                 if (quotient.length > 0 || q > 0) {
-                   quotient[quotient.length] = q;
-                 }
-               }
+             var parents = context.graph().parentWays(newEntity);
+             var parentCopied = parents.some(function (parent) {
+               return originals.has(parent.id);
+             });
 
-               remainders[remainders.length] = x;
-               dividend = quotient;
+             if (!parentCopied) {
+               newIDs.push(newEntity.id);
              }
-             /* Convert the remainders to the output string */
+           } // Put pasted objects where mouse pointer is..
 
 
-             output = '';
+           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));
+         }
 
-             for (i = remainders.length - 1; i >= 0; i--) {
-               output += encoding.charAt(remainders[i]);
-             }
-             /* Append leading zero equivalents */
+         function behavior() {
+           context.keybinding().on(uiCmd('⌘V'), doPaste);
+           return behavior;
+         }
 
+         behavior.off = function () {
+           context.keybinding().off(uiCmd('⌘V'));
+         };
 
-             full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));
+         return behavior;
+       }
 
-             for (i = output.length; i < full_length; i += 1) {
-               output = encoding[0] + output;
-             }
+       /*
+           `behaviorDrag` is like `d3_behavior.drag`, with the following differences:
 
-             return output;
-           }
-           /**
-            * Convert a raw string to a base-64 string
-            */
+           * 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 behaviorDrag() {
+         var dispatch = dispatch$8('start', 'move', 'end'); // see also behaviorSelect
 
-           function rstr2b64(input, b64pad) {
-             var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
-                 output = '',
-                 len = input.length,
-                 i,
-                 j,
-                 triplet;
-             b64pad = b64pad || '=';
+         var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping
 
-             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 _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981
 
-               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);
-                 }
-               }
-             }
+         var _origin = null;
+         var _selector = '';
 
-             return output;
-           }
+         var _targetNode;
 
-           Hashes = {
-             /**
-              * @property {String} version
-              * @readonly
-              */
-             VERSION: '1.0.6',
+         var _targetEntity;
 
-             /**
-              * @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
+         var _surface;
 
-               this.encode = function (input) {
-                 var i,
-                     j,
-                     triplet,
-                     output = '',
-                     len = input.length;
-                 pad = pad || '=';
-                 input = utf8 ? utf8Encode(input) : input;
+         var _pointerId; // use pointer events on supported platforms; fallback to mouse events
 
-                 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);
-                     }
-                   }
-                 }
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-                 return output;
-               }; // public method for decoding
+         var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');
 
+         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);
+           };
+         };
 
-               this.decode = function (input) {
-                 // var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
-                 var i,
-                     o1,
-                     o2,
-                     o3,
-                     h1,
-                     h2,
-                     h3,
-                     h4,
-                     bits,
-                     ac,
-                     dec = '',
-                     arr = [];
+         function pointerdown(d3_event) {
+           if (_pointerId) return;
+           _pointerId = d3_event.pointerId || 'mouse';
+           _targetNode = this; // only force reflow once per drag
 
-                 if (!input) {
-                   return input;
-                 }
+           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);
 
-                 i = ac = 0;
-                 input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
-                 //input += '';
+           if (_origin) {
+             offset = _origin.call(_targetNode, _targetEntity);
+             offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
+           } else {
+             offset = [0, 0];
+           }
 
-                 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;
+           d3_event.stopPropagation();
 
-                   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);
+           function pointermove(d3_event) {
+             if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+             var p = pointerLocGetter(d3_event);
 
-                 dec = arr.join('');
-                 dec = utf8 ? utf8Decode(dec) : dec;
-                 return dec;
-               }; // set custom pad string
+             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
+
+               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 pointerup(d3_event) {
+             if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+             _pointerId = null;
 
-               this.setPad = function (str) {
-                 pad = str || pad;
-                 return this;
-               }; // set custom tab string characters
+             if (started) {
+               dispatch.call('end', this, d3_event, _targetEntity);
+               d3_event.preventDefault();
+             }
 
+             select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+             selectEnable();
+           }
+         }
 
-               this.setTab = function (str) {
-                 tab = str || tab;
-                 return this;
-               };
+         function behavior(selection) {
+           var matchesSelector = utilPrefixDOMProperty('matchesSelector');
+           var delegate = pointerdown;
 
-               this.setUTF8 = function (bool) {
-                 if (typeof bool === 'boolean') {
-                   utf8 = bool;
-                 }
+           if (_selector) {
+             delegate = function delegate(d3_event) {
+               var root = this;
+               var target = d3_event.target;
 
-                 return this;
-               };
-             },
+               for (; target && target !== root; target = target.parentNode) {
+                 var datum = target.__data__;
+                 _targetEntity = datum instanceof osmNote ? datum : datum && datum.properties && datum.properties.entity;
 
-             /**
-              * 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;
+                 if (_targetEntity && target[matchesSelector](_selector)) {
+                   return pointerdown.call(target, d3_event);
+                 }
+               }
+             };
+           }
 
-               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)
+           selection.on(_pointerPrefix + 'down.drag' + _selector, delegate);
+         }
 
+         behavior.off = function (selection) {
+           selection.on(_pointerPrefix + 'down.drag' + _selector, null);
+         };
 
-               return (crc ^ -1) >>> 0;
-             },
+         behavior.selector = function (_) {
+           if (!arguments.length) return _selector;
+           _selector = _;
+           return behavior;
+         };
 
-             /**
-              * @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
+         behavior.origin = function (_) {
+           if (!arguments.length) return _origin;
+           _origin = _;
+           return behavior;
+         };
 
-               this.hex = function (s) {
-                 return rstr2hex(rstr(s), hexcase);
-               };
+         behavior.cancel = function () {
+           select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+           return behavior;
+         };
 
-               this.b64 = function (s) {
-                 return rstr2b64(rstr(s), b64pad);
-               };
+         behavior.targetNode = function (_) {
+           if (!arguments.length) return _targetNode;
+           _targetNode = _;
+           return behavior;
+         };
 
-               this.any = function (s, e) {
-                 return rstr2any(rstr(s), e);
-               };
+         behavior.targetEntity = function (_) {
+           if (!arguments.length) return _targetEntity;
+           _targetEntity = _;
+           return behavior;
+         };
 
-               this.raw = function (s) {
-                 return rstr(s);
-               };
+         behavior.surface = function (_) {
+           if (!arguments.length) return _surface;
+           _surface = _;
+           return behavior;
+         };
 
-               this.hex_hmac = function (k, d) {
-                 return rstr2hex(rstr_hmac(k, d), hexcase);
-               };
+         return utilRebind(behavior, dispatch, 'on');
+       }
 
-               this.b64_hmac = function (k, d) {
-                 return rstr2b64(rstr_hmac(k, d), b64pad);
-               };
+       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);
 
-               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 _nudgeInterval;
 
+         var _restoreSelectedIDs = [];
+         var _wasMidpoint = false;
+         var _isCancelled = false;
 
-               this.vm_test = function () {
-                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-               };
-               /**
-                * Enable/disable uppercase hexadecimal returned string
-                * @param {Boolean}
-                * @return {Object} this
-                */
+         var _activeEntity;
 
+         var _startLoc;
 
-               this.setUpperCase = function (a) {
-                 if (typeof a === 'boolean') {
-                   hexcase = a;
-                 }
+         var _lastLoc;
 
-                 return this;
-               };
-               /**
-                * Defines a base64 pad string
-                * @param {String} Pad
-                * @return {Object} this
-                */
+         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);
+         }
 
+         function stopNudge() {
+           if (_nudgeInterval) {
+             window.clearInterval(_nudgeInterval);
+             _nudgeInterval = null;
+           }
+         }
 
-               this.setPad = function (a) {
-                 b64pad = a || b64pad;
-                 return this;
-               };
-               /**
-                * Defines a base64 pad string
-                * @param {Boolean}
-                * @return {Object} [this]
-                */
+         function moveAnnotation(entity) {
+           return _t('operations.move.annotation.' + entity.geometry(context.graph()));
+         }
 
+         function connectAnnotation(nodeEntity, targetEntity) {
+           var nodeGeometry = nodeEntity.geometry(context.graph());
+           var targetGeometry = targetEntity.geometry(context.graph());
 
-               this.setUTF8 = function (a) {
-                 if (typeof a === 'boolean') {
-                   utf8 = a;
-                 }
+           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 this;
-               }; // private methods
+             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');
+               }
 
-               /**
-                * Calculate the MD5 of a raw string
-                */
+               return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
+             }
+           }
 
+           return _t('operations.connect.annotation.from_' + nodeGeometry + '.to_' + targetGeometry);
+         }
 
-               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 shouldSnapToNode(target) {
+           if (!_activeEntity) return false;
+           return _activeEntity.geometry(context.graph()) !== 'vertex' || target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph());
+         }
 
+         function origin(entity) {
+           return context.projection(entity.loc);
+         }
 
-               function rstr_hmac(key, data) {
-                 var bkey, ipad, opad, hash, i;
-                 key = utf8 ? utf8Encode(key) : key;
-                 data = utf8 ? utf8Encode(data) : data;
-                 bkey = rstr2binl(key);
+         function keydown(d3_event) {
+           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             if (context.surface().classed('nope')) {
+               context.surface().classed('nope-suppressed', true);
+             }
 
-                 if (bkey.length > 16) {
-                   bkey = binl(bkey, key.length * 8);
-                 }
+             context.surface().classed('nope', false).classed('nope-disabled', true);
+           }
+         }
 
-                 ipad = Array(16), opad = Array(16);
+         function keyup(d3_event) {
+           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             if (context.surface().classed('nope-suppressed')) {
+               context.surface().classed('nope', true);
+             }
 
-                 for (i = 0; i < 16; i += 1) {
-                   ipad[i] = bkey[i] ^ 0x36363636;
-                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
-                 }
+             context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
+           }
+         }
 
-                 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 start(d3_event, entity) {
+           _wasMidpoint = entity.type === 'midpoint';
+           var hasHidden = context.features().hasHiddenConnections(entity, context.graph());
+           _isCancelled = !context.editable() || d3_event.shiftKey || hasHidden;
 
+           if (_isCancelled) {
+             if (hasHidden) {
+               context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('modes.drag_node.connected_to_hidden'))();
+             }
 
-               function binl(x, len) {
-                 var i,
-                     olda,
-                     oldb,
-                     oldc,
-                     oldd,
-                     a = 1732584193,
-                     b = -271733879,
-                     c = -1732584194,
-                     d = 271733878;
-                 /* append padding */
+             return drag.cancel();
+           }
 
-                 x[len >> 5] |= 0x80 << len % 32;
-                 x[(len + 64 >>> 9 << 4) + 14] = len;
+           if (_wasMidpoint) {
+             var midpoint = entity;
+             entity = osmNode();
+             context.perform(actionAddMidpoint(midpoint, entity));
+             entity = context.entity(entity.id); // get post-action entity
 
-                 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);
-                 }
+             var vertex = context.surface().selectAll('.' + entity.id);
+             drag.targetNode(vertex.node()).targetEntity(entity);
+           } else {
+             context.perform(actionNoop());
+           }
 
-                 return Array(a, b, c, d);
-               }
-               /**
-                * These functions implement the four basic operations the algorithm uses.
-                */
+           _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()`
 
 
-               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);
-               }
+         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 : {};
+           }
+         }
 
-               function md5_ff(a, b, c, d, x, s, t) {
-                 return md5_cmn(b & c | ~b & d, a, b, x, s, t);
-               }
+         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;
 
-               function md5_gg(a, b, c, d, x, s, t) {
-                 return md5_cmn(b & d | c & ~d, a, b, x, s, t);
-               }
+           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;
 
-               function md5_hh(a, b, c, d, x, s, t) {
-                 return md5_cmn(b ^ c ^ d, a, b, x, s, t);
+             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);
 
-               function md5_ii(a, b, c, d, x, s, t) {
-                 return md5_cmn(c ^ (b | ~d), a, b, x, s, t);
+               if (edge) {
+                 loc = edge.loc;
                }
-             },
+             }
+           }
 
-             /**
-              * @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
+           context.replace(actionMoveNode(entity.id, loc)); // Below here: validations
 
-               this.hex = function (s) {
-                 return rstr2hex(rstr(s), hexcase);
-               };
+           var isInvalid = false; // Check if this connection to `target` could cause relations to break..
 
-               this.b64 = function (s) {
-                 return rstr2b64(rstr(s), b64pad);
-               };
+           if (target) {
+             isInvalid = hasRelationConflict(entity, target, edge, context.graph());
+           } // Check if this drag causes the geometry to break..
 
-               this.any = function (s, e) {
-                 return rstr2any(rstr(s), e);
-               };
 
-               this.raw = function (s) {
-                 return rstr(s);
-               };
+           if (!isInvalid) {
+             isInvalid = hasInvalidGeometry(entity, context.graph());
+           }
 
-               this.hex_hmac = function (k, d) {
-                 return rstr2hex(rstr_hmac(k, d));
-               };
+           var nope = context.surface().classed('nope');
 
-               this.b64_hmac = function (k, d) {
-                 return rstr2b64(rstr_hmac(k, d), b64pad);
-               };
+           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('')();
+             }
+           }
 
-               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 nopeDisabled = context.surface().classed('nope-disabled');
 
+           if (nopeDisabled) {
+             context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
+           } else {
+             context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
+           }
 
-               this.vm_test = function () {
-                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-               };
-               /**
-                * @description Enable/disable uppercase hexadecimal returned string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+           _lastLoc = loc;
+         } // Uses `actionConnect.disabled()` to know whether this connection is ok..
 
 
-               this.setUpperCase = function (a) {
-                 if (typeof a === 'boolean') {
-                   hexcase = a;
-                 }
+         function hasRelationConflict(entity, target, edge, graph) {
+           var testGraph = graph.update(); // copy
+           // if snapping to way - add midpoint there and consider that the target..
 
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {string} Pad
-                * @return {Object} this
-                * @public
-                */
+           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.setPad = function (a) {
-                 b64pad = a || b64pad;
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+           var ids = [entity.id, target.id];
+           return actionConnect(ids).disabled(testGraph);
+         }
 
+         function hasInvalidGeometry(entity, graph) {
+           var parents = graph.parentWays(entity);
+           var i, j, k;
 
-               this.setUTF8 = function (a) {
-                 if (typeof a === 'boolean') {
-                   utf8 = a;
-                 }
+           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
 
-                 return this;
-               }; // private methods
+             var relations = graph.parentRelations(parent);
 
-               /**
-                * Calculate the SHA-512 of a raw string
-                */
+             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
 
+               for (k = 0; k < rings.length; k++) {
+                 nodes = rings[k].nodes;
 
-               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)
-                */
+                 if (nodes.find(function (n) {
+                   return n.id === entity.id;
+                 })) {
+                   activeIndex = k;
 
+                   if (geoHasSelfIntersections(nodes, entity.id)) {
+                     return 'multipolygonMember';
+                   }
+                 }
 
-               function rstr_hmac(key, data) {
-                 var bkey, ipad, opad, i, hash;
-                 key = utf8 ? utf8Encode(key) : key;
-                 data = utf8 ? utf8Encode(data) : data;
-                 bkey = rstr2binb(key);
+                 rings[k].coords = nodes.map(function (n) {
+                   return n.loc;
+                 });
+               } // test active ring for intersections with other rings in the multipolygon
 
-                 if (bkey.length > 16) {
-                   bkey = binb(bkey, key.length * 8);
-                 }
 
-                 ipad = Array(16), opad = Array(16);
+               for (k = 0; k < rings.length; k++) {
+                 if (k === activeIndex) continue; // make sure active ring doesn't cross passive rings
 
-                 for (i = 0; i < 16; i += 1) {
-                   ipad[i] = bkey[i] ^ 0x36363636;
-                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 if (geoHasLineIntersections(rings[activeIndex].nodes, rings[k].nodes, entity.id)) {
+                   return 'multipolygonRing';
                  }
-
-                 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
-                */
+             } // 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.
 
 
-               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 */
+             if (activeIndex === null) {
+               nodes = parent.nodes.map(function (nodeID) {
+                 return graph.entity(nodeID);
+               });
 
-                 x[len >> 5] |= 0x80 << 24 - len % 32;
-                 x[(len + 64 >> 9 << 4) + 15] = len;
+               if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
+                 return parent.geometry(graph);
+               }
+             }
+           }
 
-                 for (i = 0; i < x.length; i += 16) {
-                   olda = a;
-                   oldb = b;
-                   oldc = c;
-                   oldd = d;
-                   olde = e;
+           return false;
+         }
 
-                   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);
-                     }
+         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());
 
-                     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;
-                   }
+           if (nudge) {
+             startNudge(d3_event, entity, nudge);
+           } else {
+             stopNudge();
+           }
+         }
 
-                   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 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
 
-                 return Array(a, b, c, d, e);
-               }
-               /**
-                * Perform the appropriate triplet combination function for the current
-                * iteration
-                */
+           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 sha1_ft(t, b, c, d) {
-                 if (t < 20) {
-                   return b & c | ~b & d;
-                 }
+             if (reselection.length) {
+               context.enter(modeSelect(context, reselection));
+             } else {
+               context.enter(modeBrowse(context));
+             }
+           }
+         }
 
-                 if (t < 40) {
-                   return b ^ c ^ d;
-                 }
+         function _actionBounceBack(nodeID, toLoc) {
+           var moveNode = actionMoveNode(nodeID, toLoc);
 
-                 if (t < 60) {
-                   return b & c | b & d | c & d;
-                 }
+           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);
+           };
 
-                 return b ^ c ^ d;
-               }
-               /**
-                * Determine the appropriate additive constant for the current iteration
-                */
+           action.transitionable = true;
+           return action;
+         }
 
+         function cancel() {
+           drag.cancel();
+           context.enter(modeBrowse(context));
+         }
 
-               function sha1_kt(t) {
-                 return t < 20 ? 1518500249 : t < 40 ? 1859775393 : t < 60 ? -1894007588 : -899497514;
-               }
-             },
+         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);
 
-             /**
-              * @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 : '=',
+         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);
+         };
 
-               /* base-64 pad character. Default '=' for strict RFC compliance   */
-               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
+         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();
+         };
 
-               /* enable/disable utf8 encoding */
-               sha256_K;
-               /* privileged (public) methods */
+         mode.selectedIDs = function () {
+           if (!arguments.length) return _activeEntity ? [_activeEntity.id] : []; // no assign
 
-               this.hex = function (s) {
-                 return rstr2hex(rstr(s, utf8));
-               };
+           return mode;
+         };
 
-               this.b64 = function (s) {
-                 return rstr2b64(rstr(s, utf8), b64pad);
-               };
+         mode.activeID = function () {
+           if (!arguments.length) return _activeEntity && _activeEntity.id; // no assign
 
-               this.any = function (s, e) {
-                 return rstr2any(rstr(s, utf8), e);
-               };
+           return mode;
+         };
 
-               this.raw = function (s) {
-                 return rstr(s, utf8);
-               };
+         mode.restoreSelectedIDs = function (_) {
+           if (!arguments.length) return _restoreSelectedIDs;
+           _restoreSelectedIDs = _;
+           return mode;
+         };
 
-               this.hex_hmac = function (k, d) {
-                 return rstr2hex(rstr_hmac(k, d));
-               };
+         mode.behavior = drag;
+         return mode;
+       }
 
-               this.b64_hmac = function (k, d) {
-                 return rstr2b64(rstr_hmac(k, d), b64pad);
-               };
+       var $$3 = _export;
+       var NativePromise = nativePromiseConstructor;
+       var fails$1 = fails$V;
+       var getBuiltIn = getBuiltIn$b;
+       var isCallable = isCallable$r;
+       var speciesConstructor = speciesConstructor$5;
+       var promiseResolve = promiseResolve$2;
+       var redefine$1 = redefine$h.exports;
 
-               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
-                */
+       // Safari bug https://bugs.webkit.org/show_bug.cgi?id=200829
+       var NON_GENERIC = !!NativePromise && fails$1(function () {
+         // eslint-disable-next-line unicorn/no-thenable -- required for testing
+         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
+           );
+         }
+       });
 
-               this.vm_test = function () {
-                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-               };
-               /**
-                * Enable/disable uppercase hexadecimal returned string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+       // 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 });
+         }
+       }
 
+       function quickselect(arr, k, left, right, compare) {
+         quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
+       }
 
-               this.setUpperCase = function (a) {
-                 if (typeof a === 'boolean') {
-                   hexcase = a;
-                 }
+       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);
+           }
 
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {string} Pad
-                * @return {Object} this
-                * @public
-                */
+           var t = arr[k];
+           var i = left;
+           var j = right;
+           swap(arr, left, k);
+           if (compare(arr[right], t) > 0) swap(arr, left, right);
 
+           while (i < j) {
+             swap(arr, i, j);
+             i++;
+             j--;
 
-               this.setPad = function (a) {
-                 b64pad = a || b64pad;
-                 return this;
-               };
-               /**
-                * Defines a base64 pad string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+             while (compare(arr[i], t) < 0) {
+               i++;
+             }
 
+             while (compare(arr[j], t) > 0) {
+               j--;
+             }
+           }
 
-               this.setUTF8 = function (a) {
-                 if (typeof a === 'boolean') {
-                   utf8 = a;
-                 }
+           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 this;
-               }; // private methods
+       function swap(arr, i, j) {
+         var tmp = arr[i];
+         arr[i] = arr[j];
+         arr[j] = tmp;
+       }
 
-               /**
-                * Calculate the SHA-512 of a raw string
-                */
+       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 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)
-                */
+           _classCallCheck$1(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 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);
+         _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 = [];
 
-                 if (bkey.length > 16) {
-                   bkey = binb(bkey, key.length * 8);
-                 }
+             while (node) {
+               for (var i = 0; i < node.children.length; i++) {
+                 var child = node.children[i];
+                 var childBBox = node.leaf ? toBBox(child) : child;
 
-                 for (; i < 16; i += 1) {
-                   ipad[i] = bkey[i] ^ 0x36363636;
-                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 if (intersects(bbox, childBBox)) {
+                   if (node.leaf) result.push(child);else if (contains(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(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
-                */
 
+               node = nodesToSearch.pop();
+             }
 
-               function sha256_S(X, n) {
-                 return X >>> n | X << 32 - n;
-               }
+             return result;
+           }
+         }, {
+           key: "collides",
+           value: function collides(bbox) {
+             var node = this.data;
+             if (!intersects(bbox, node)) return false;
+             var nodesToSearch = [];
 
-               function sha256_R(X, n) {
-                 return X >>> n;
-               }
+             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 sha256_Ch(x, y, z) {
-                 return x & y ^ ~x & z;
+                 if (intersects(bbox, childBBox)) {
+                   if (node.leaf || contains(bbox, childBBox)) return true;
+                   nodesToSearch.push(child);
+                 }
                }
 
-               function sha256_Maj(x, y, z) {
-                 return x & y ^ x & z ^ y & z;
-               }
+               node = nodesToSearch.pop();
+             }
 
-               function sha256_Sigma0256(x) {
-                 return sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22);
-               }
+             return false;
+           }
+         }, {
+           key: "load",
+           value: function load(data) {
+             if (!(data && data.length)) return this;
 
-               function sha256_Sigma1256(x) {
-                 return sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25);
+             if (data.length < this._minEntries) {
+               for (var i = 0; i < data.length; i++) {
+                 this.insert(data[i]);
                }
 
-               function sha256_Gamma0256(x) {
-                 return sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3);
-               }
+               return this;
+             } // recursively build the tree with the given data from scratch using OMT algorithm
 
-               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];
+             var node = this._build(data.slice(), 0, data.length - 1, 0);
 
-               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 (!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
 
-                 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];
+               this._insert(node, this.data.height - node.height - 1, true);
+             }
 
-                   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]);
-                     }
+             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;
+               }
+
+               if (node.leaf) {
+                 // check current node
+                 var index = findItem(item, node.children, equalsFn);
 
-                     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);
-                   }
+                 if (index !== -1) {
+                   // item found, remove the item and condense tree upwards
+                   node.children.splice(index, 1);
+                   path.push(node);
 
-                   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]);
-                 }
+                   this._condense(path);
 
-                 return HASH;
+                   return this;
+                 }
                }
-             },
 
-             /**
-              * @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,
+               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
 
-               /* 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,
+             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 = [];
 
-               /* enable/disable utf8 encoding */
-               sha512_k;
-               /* privileged (public) methods */
+             while (node) {
+               if (node.leaf) result.push.apply(result, _toConsumableArray(node.children));else nodesToSearch.push.apply(nodesToSearch, _toConsumableArray(node.children));
+               node = nodesToSearch.pop();
+             }
 
-               this.hex = function (s) {
-                 return rstr2hex(rstr(s));
-               };
+             return result;
+           }
+         }, {
+           key: "_build",
+           value: function _build(items, left, right, height) {
+             var N = right - left + 1;
+             var M = this._maxEntries;
+             var node;
 
-               this.b64 = function (s) {
-                 return rstr2b64(rstr(s), b64pad);
-               };
+             if (N <= M) {
+               // reached leaf level; return leaf
+               node = createNode(items.slice(left, right + 1));
+               calcBBox(node, this.toBBox);
+               return node;
+             }
 
-               this.any = function (s, e) {
-                 return rstr2any(rstr(s), e);
-               };
+             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.raw = function (s) {
-                 return rstr(s);
-               };
+               M = Math.ceil(N / Math.pow(M, height - 1));
+             }
 
-               this.hex_hmac = function (k, d) {
-                 return rstr2hex(rstr_hmac(k, d));
-               };
+             node = createNode([]);
+             node.leaf = false;
+             node.height = height; // split the items into M mostly square tiles
 
-               this.b64_hmac = function (k, d) {
-                 return rstr2b64(rstr_hmac(k, d), b64pad);
-               };
+             var N2 = Math.ceil(N / M);
+             var N1 = N2 * Math.ceil(Math.sqrt(M));
+             multiSelect(items, left, right, N1, this.compareMinX);
 
-               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
-                */
+             for (var i = left; i <= right; i += N1) {
+               var right2 = Math.min(i + N1 - 1, right);
+               multiSelect(items, i, right2, N2, this.compareMinY);
+
+               for (var j = i; j <= right2; j += N2) {
+                 var right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
 
+                 node.children.push(this._build(items, j, right3, height - 1));
+               }
+             }
 
-               this.vm_test = function () {
-                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-               };
-               /**
-                * @description Enable/disable uppercase hexadecimal returned string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+             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
 
-               this.setUpperCase = function (a) {
-                 if (typeof a === 'boolean') {
-                   hexcase = a;
+                 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 this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {string} Pad
-                * @return {Object} this
-                * @public
-                */
+               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
 
-               this.setPad = function (a) {
-                 b64pad = a || b64pad;
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+             var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
 
 
-               this.setUTF8 = function (a) {
-                 if (typeof a === 'boolean') {
-                   utf8 = a;
-                 }
+             node.children.push(item);
+             extend$1(node, bbox); // split on node overflow; propagate upwards if necessary
 
-                 return this;
-               };
-               /* private methods */
+             while (level >= 0) {
+               if (insertPath[level].children.length > this._maxEntries) {
+                 this._split(insertPath, level);
 
-               /**
-                * Calculate the SHA-512 of a raw string
-                */
+                 level--;
+               } else break;
+             } // adjust bboxes along the insertion path
 
 
-               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)
-                */
+             this._adjustParentBBoxes(bbox, insertPath, level);
+           } // split overflowed node into two
 
+         }, {
+           key: "_split",
+           value: function _split(insertPath, level) {
+             var node = insertPath[level];
+             var M = node.children.length;
+             var m = this._minEntries;
 
-               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);
+             this._chooseSplitAxis(node, m, M);
 
-                 if (bkey.length > 32) {
-                   bkey = binb(bkey, key.length * 8);
-                 }
+             var splitIndex = this._chooseSplitIndex(node, m, M);
 
-                 for (; i < 32; i += 1) {
-                   ipad[i] = bkey[i] ^ 0x36363636;
-                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
-                 }
+             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;
 
-                 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
-                */
+             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 (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 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);
+             return index || M - m;
+           } // sorts node children by the best axis for split
 
-                 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)];
-                 }
+         }, {
+           key: "_chooseSplitAxis",
+           value: function _chooseSplitAxis(node, m, M) {
+             var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;
+             var compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;
 
-                 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 xMargin = this._allDistMargin(node, m, M, compareMinX);
 
+             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
 
-                 x[len >> 5] |= 0x80 << 24 - (len & 0x1f);
-                 x[(len + 128 >> 10 << 5) + 31] = len;
-                 l = x.length;
 
-                 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 (xMargin < yMargin) node.children.sort(compareMinX);
+           } // total margin of all possible split distributions where each node is at least m full
 
-                   for (j = 0; j < 16; j += 1) {
-                     W[j].h = x[i + 2 * j];
-                     W[j].l = x[i + 2 * j + 1];
-                   }
+         }, {
+           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 (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
+             for (var i = m; i < M - m; i++) {
+               var child = node.children[i];
+               extend$1(leftBBox, node.leaf ? toBBox(child) : child);
+               margin += bboxMargin(leftBBox);
+             }
 
-                     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 (var _i = M - m - 1; _i >= m; _i--) {
+               var _child = node.children[_i];
+               extend$1(rightBBox, node.leaf ? toBBox(_child) : _child);
+               margin += bboxMargin(rightBBox);
+             }
 
-                   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
+             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);
+             }
+           }
+         }]);
 
-                     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
+         return RBush;
+       }();
 
-                     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 findItem(item, items, equalsFn) {
+         if (!equalsFn) return items.indexOf(item);
 
-                     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);
-                   }
+         for (var i = 0; i < items.length; i++) {
+           if (equalsFn(item, items[i])) return i;
+         }
 
-                   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
+         return -1;
+       } // calculate node's bbox from bboxes of its children
 
 
-                 for (i = 0; i < 8; i += 1) {
-                   hash[2 * i] = H[i].h;
-                   hash[2 * i + 1] = H[i].l;
-                 }
+       function calcBBox(node, toBBox) {
+         distBBox(node, 0, node.children.length, toBBox, node);
+       } // min bounding rectangle of node children from k to p-1
 
-                 return hash;
-               } //A constructor for 64-bit numbers
 
+       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 int64(h, l) {
-                 this.h = h;
-                 this.l = l; //this.toString = int64toString;
-               } //Copies src into dst, assuming both are 64-bit numbers
+         for (var i = k; i < p; i++) {
+           var child = node.children[i];
+           extend$1(destNode, node.leaf ? toBBox(child) : child);
+         }
 
+         return destNode;
+       }
 
-               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 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 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
+       function compareNodeMinY(a, b) {
+         return a.minY - b.minY;
+       }
 
+       function bboxArea(a) {
+         return (a.maxX - a.minX) * (a.maxY - a.minY);
+       }
 
-               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 bboxMargin(a) {
+         return a.maxX - a.minX + (a.maxY - a.minY);
+       }
 
+       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 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
+       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 contains(a, b) {
+         return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
+       }
 
-               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.
+       function intersects(a, b) {
+         return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
+       }
 
+       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 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 multiSelect(arr, left, right, n, compare) {
+         var stack = [left, right];
 
-               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;
-               }
-             },
+         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);
+         }
+       }
 
-             /**
-              * @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,
+       function responseText(response) {
+         if (!response.ok) throw new Error(response.status + " " + response.statusText);
+         return response.text();
+       }
 
-               /* hexadecimal output case format. false - lowercase; true - uppercase  */
-               b64pad = options && typeof options.pad === 'string' ? options.pa : '=',
+       function d3_text (input, init) {
+         return fetch(input, init).then(responseText);
+       }
 
-               /* base-64 pad character. Default '=' for strict RFC compliance   */
-               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
+       function responseJson(response) {
+         if (!response.ok) throw new Error(response.status + " " + response.statusText);
+         if (response.status === 204 || response.status === 205) return;
+         return response.json();
+       }
 
-               /* 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 */
+       function d3_json (input, init) {
+         return fetch(input, init).then(responseJson);
+       }
 
-               this.hex = function (s) {
-                 return rstr2hex(rstr(s));
-               };
+       function parser(type) {
+         return function (input, init) {
+           return d3_text(input, init).then(function (text) {
+             return new DOMParser().parseFromString(text, type);
+           });
+         };
+       }
 
-               this.b64 = function (s) {
-                 return rstr2b64(rstr(s), b64pad);
-               };
+       var d3_xml = parser("application/xml");
+       var svg = parser("image/svg+xml");
 
-               this.any = function (s, e) {
-                 return rstr2any(rstr(s), e);
-               };
+       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
 
-               this.raw = function (s) {
-                 return rstr(s);
-               };
+       var _cache$2;
 
-               this.hex_hmac = function (k, d) {
-                 return rstr2hex(rstr_hmac(k, d));
-               };
+       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.b64_hmac = function (k, d) {
-                 return rstr2b64(rstr_hmac(k, d), b64pad);
-               };
+       function abortRequest$6(controller) {
+         if (controller) {
+           controller.abort();
+         }
+       }
 
-               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 abortUnwantedRequests$3(cache, tiles) {
+         Object.keys(cache.inflightTile).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
+             return k === tile.id;
+           });
 
+           if (!wanted) {
+             abortRequest$6(cache.inflightTile[k]);
+             delete cache.inflightTile[k];
+           }
+         });
+       }
 
-               this.vm_test = function () {
-                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-               };
-               /**
-                * @description Enable/disable uppercase hexadecimal returned string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+       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.setUpperCase = function (a) {
-                 if (typeof a === 'boolean') {
-                   hexcase = a;
-                 }
+       function updateRtree$3(item, replace) {
+         _cache$2.rtree.remove(item, function (a, b) {
+           return a.data.id === b.data.id;
+         });
 
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {string} Pad
-                * @return {Object} this
-                * @public
-                */
+         if (replace) {
+           _cache$2.rtree.insert(item);
+         }
+       }
 
+       function tokenReplacements(d) {
+         if (!(d instanceof QAItem)) return;
+         var replacements = {};
+         var issueTemplate = _krData.errorTypes[d.whichType];
 
-               this.setPad = function (a) {
-                 if (typeof a !== 'undefined') {
-                   b64pad = a;
-                 }
+         if (!issueTemplate) {
+           /* eslint-disable no-console */
+           console.log('No Template: ', d.whichType);
+           console.log('  ', d.description);
+           /* eslint-enable no-console */
 
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+           return;
+         } // some descriptions are just fixed text
 
 
-               this.setUTF8 = function (a) {
-                 if (typeof a === 'boolean') {
-                   utf8 = a;
-                 }
+         if (!issueTemplate.regex) return; // regex pattern should match description with variable details captured
 
-                 return this;
-               };
-               /* private methods */
+         var errorRegex = new RegExp(issueTemplate.regex, 'i');
+         var errorMatch = errorRegex.exec(d.description);
 
-               /**
-                * Calculate the rmd160 of a raw string
-                */
+         if (!errorMatch) {
+           /* eslint-disable no-console */
+           console.log('Unmatched: ', d.whichType);
+           console.log('  ', d.description);
+           console.log('  ', errorRegex);
+           /* eslint-enable no-console */
 
+           return;
+         }
 
-               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)
-                */
+         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] : '';
 
+           if (idType && capture) {
+             // link IDs if present in the capture
+             capture = parseError(capture, idType);
+           } else {
+             var compare = capture.toLowerCase();
 
-               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 (_krData.localizeStrings[compare]) {
+               // some replacement strings can be localized
+               capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+             } else {
+               capture = unescape$3(capture);
+             }
+           }
 
-                 if (bkey.length > 16) {
-                   bkey = binl(bkey, key.length * 8);
-                 }
+           replacements['var' + i] = capture;
+         }
 
-                 for (i = 0; i < 16; i += 1) {
-                   ipad[i] = bkey[i] ^ 0x36363636;
-                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
-                 }
+         return replacements;
+       }
 
-                 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 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]);
+         }
 
-               function binl2rstr(input) {
-                 var i,
-                     output = '',
-                     l = input.length * 32;
+         switch (idType) {
+           // link a string like "this node"
+           case 'this':
+             capture = linkErrorObject(capture);
+             break;
 
-                 for (i = 0; i < l; i += 8) {
-                   output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
-                 }
+           case 'url':
+             capture = linkURL(capture);
+             break;
+           // link an entity ID
 
-                 return output;
-               }
-               /**
-                * Calculate the RIPE-MD160 of an array of little-endian words, 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 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 */
+           case '211':
+             capture = parse211(capture);
+             break;
 
-                 x[len >> 5] |= 0x80 << len % 32;
-                 x[(len + 64 >>> 9 << 4) + 14] = len;
-                 l = x.length;
+           case '231':
+             capture = parse231(capture);
+             break;
 
-                 for (i = 0; i < l; i += 16) {
-                   A1 = A2 = h0;
-                   B1 = B2 = h1;
-                   C1 = C2 = h2;
-                   D1 = D2 = h3;
-                   E1 = E2 = h4;
+           case '294':
+             capture = parse294(capture);
+             break;
 
-                   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;
-                   }
+           case '370':
+             capture = parse370(capture);
+             break;
+         }
 
-                   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;
-                 }
+         return capture;
 
-                 return [h0, h1, h2, h3, h4];
-               } // specific algorithm methods
+         function linkErrorObject(d) {
+           return {
+             html: "<a class=\"error_object_link\">".concat(d, "</a>")
+           };
+         }
 
+         function linkEntity(d) {
+           return {
+             html: "<a class=\"error_entity_link\">".concat(d, "</a>")
+           };
+         }
 
-               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 linkURL(d) {
+           return {
+             html: "<a class=\"kr_external_link\" target=\"_blank\" href=\"".concat(d, "\">").concat(d, "</a>")
+           };
+         } // arbitrary node list of form: #ID, #ID, #ID...
 
-               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 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 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)...
 
-           (function (window, undefined$1) {
-             var freeExports = false;
 
-             {
-               freeExports = exports;
+         function parse231(capture) {
+           var newList = []; // unfortunately 'layer' can itself contain commas, so we split on '),'
 
-               if (exports && _typeof(commonjsGlobal) === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
-                 window = commonjsGlobal;
-               }
-             }
+           var items = capture.split('),');
+           items.forEach(function (item) {
+             var match = item.match(/\#(\d+)\((.+)\)?/);
 
-             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;
+             if (match !== null && match.length > 2) {
+               newList.push(linkEntity('w' + match[1]) + ' ' + _t('QA.keepRight.errorTypes.231.layer', {
+                 layer: match[2]
+               }));
              }
-           })(this);
-         })(); // IIFE
+           });
+           return newList.join(', ');
+         } // arbitrary node/relation list of form: from node #ID,to relation #ID,to node #ID...
 
-       });
 
-       var immutable = extend$2;
-       var hasOwnProperty$2 = Object.prototype.hasOwnProperty;
+         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
 
-       function extend$2() {
-         var target = {};
+             var role = "\"".concat(item[0], "\""); // first letter of node/relation provides the type
 
-         for (var i = 0; i < arguments.length; i++) {
-           var source = arguments[i];
+             var idType = item[1].slice(0, 1); // ID has # at the front
 
-           for (var key in source) {
-             if (hasOwnProperty$2.call(source, key)) {
-               target[key] = source[key];
-             }
+             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 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]
+             });
            }
-         }
 
-         return target;
-       }
+           return '';
+         } // arbitrary node list of form: #ID,#ID,#ID...
 
-       var sha1 = new hashes.SHA1();
-       var ohauth = {};
 
-       ohauth.qsString = function (obj) {
-         return Object.keys(obj).sort().map(function (key) {
-           return ohauth.percentEncode(key) + '=' + ohauth.percentEncode(obj[key]);
-         }).join('&');
-       };
+         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(', ');
+         }
+       }
 
-       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 serviceKeepRight = {
+         title: 'keepRight',
+         init: function init() {
+           _mainFileFetcher.get('keepRight').then(function (d) {
+             return _krData = d;
+           });
 
-       ohauth.rawxhr = function (method, url, data, headers, callback) {
-         var xhr = new XMLHttpRequest(),
-             twoHundred = /^20\d$/;
+           if (!_cache$2) {
+             this.reset();
+           }
 
-         xhr.onreadystatechange = function () {
-           if (4 === xhr.readyState && 0 !== xhr.status) {
-             if (twoHundred.test(xhr.status)) callback(null, xhr);else return callback(xhr, null);
+           this.event = utilRebind(this, dispatch$7, 'on');
+         },
+         reset: function reset() {
+           if (_cache$2) {
+             Object.values(_cache$2.inflightTile).forEach(abortRequest$6);
            }
-         };
 
-         xhr.onerror = function (e) {
-           return callback(e, null);
-         };
+           _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;
 
-         xhr.open(method, url, true);
+           var options = {
+             format: 'geojson',
+             ch: _krRuleset
+           }; // determine the needed tiles to cover the view
 
-         for (var h in headers) {
-           xhr.setRequestHeader(h, headers[h]);
-         }
+           var tiles = tiler$6.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection); // abort inflight requests that are no longer needed
 
-         xhr.send(data);
-         return xhr;
-       };
+           abortUnwantedRequests$3(_cache$2, tiles); // issue new requests..
 
-       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);
-       };
+           tiles.forEach(function (tile) {
+             if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) return;
 
-       ohauth.nonce = function () {
-         for (var o = ''; o.length < 6;) {
-           o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
-         }
+             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];
 
-         return o;
-       };
+             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;
 
-       ohauth.authHeader = function (obj) {
-         return Object.keys(obj).sort().map(function (key) {
-           return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
-         }).join(', ');
-       };
+               if (!data || !data.features || !data.features.length) {
+                 throw new Error('No Data');
+               }
 
-       ohauth.timestamp = function () {
-         return ~~(+new Date() / 1000);
-       };
+               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)
 
-       ohauth.percentEncode = function (s) {
-         return encodeURIComponent(s).replace(/\!/g, '%21').replace(/\'/g, '%27').replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
-       };
+                 var issueTemplate = _krData.errorTypes[itemType];
+                 var parentIssueType = (Math.floor(itemType / 10) * 10).toString(); // try to handle error type directly, fallback to parent error type.
 
-       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('&');
-       };
+                 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.
 
-       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.
-        */
+                 switch (whichType) {
+                   case '170':
+                     description = "This feature has a FIXME tag: ".concat(description);
+                     break;
 
+                   case '292':
+                   case '293':
+                     description = description.replace('A turn-', 'This turn-');
+                     break;
 
-       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();
+                   case '294':
+                   case '295':
+                   case '296':
+                   case '297':
+                   case '298':
+                     description = "This turn-restriction~".concat(description);
+                     break;
 
-           if (typeof extra_params === 'string' && extra_params.length > 0) {
-             extra_params = ohauth.stringQs(extra_params);
-           }
+                   case '300':
+                     description = 'This highway is missing a maxspeed tag';
+                     break;
 
-           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);
-         };
-       };
+                   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
 
-       var ohauth_1 = ohauth;
 
-       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 coincident = false;
 
-             if (numUrls === 0) {
-               throw new Error("resolveUrl requires at least one argument; got none.");
-             }
+                 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 base = document.createElement("base");
-             base.href = arguments[0];
+                 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;
 
-             if (numUrls === 1) {
-               return base.href;
-             }
+                 _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;
 
-             var head = document.getElementsByTagName("head")[0];
-             head.insertBefore(base, head.firstChild);
-             var a = document.createElement("a");
-             var resolved;
+           if (_cache$2.inflightPost[d.id]) {
+             return callback({
+               message: 'Error update already inflight',
+               status: -2
+             }, d);
+           }
 
-             for (var index = 1; index < numUrls; index++) {
-               a.href = arguments[index];
-               resolved = a.href;
-               base.href = resolved;
-             }
+           var params = {
+             schema: d.schema,
+             id: d.id
+           };
 
-             head.removeChild(base);
-             return resolved;
+           if (d.newStatus) {
+             params.st = d.newStatus;
            }
 
-           return resolveUrl;
-         });
-       });
+           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.
 
-       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
-       };
 
-       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(_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)
+
+           d3_json(url, {
+             signal: controller.signal
+           })["finally"](function () {
+             delete _cache$2.inflightPost[d.id];
+
+             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
+               }));
              }
 
-             return obj;
-           };
+             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 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));
-           };
-         } else {
-           var F = function F() {}; // eslint-disable-line no-inner-declarations
+       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
 
+       var _cache$1;
 
-           return function create(obj, assignProps1, assignProps2, etc) {
-             var assignArgsList = slice$2(arguments, 1);
-             F.prototype = obj;
-             return assign.apply(this, [new F()].concat(assignArgsList));
-           };
-         }
+       function abortRequest$5(i) {
+         Object.values(i).forEach(function (controller) {
+           if (controller) {
+             controller.abort();
+           }
+         });
        }
 
-       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 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 bind$1(obj, fn) {
-         return function () {
-           return fn.apply(obj, Array.prototype.slice.call(arguments, 0));
+       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
 
-       function slice$2(arr, index) {
-         return Array.prototype.slice.call(arr, index || 0);
-       }
 
-       function each(obj, fn) {
-         pluck(obj, function (val, key) {
-           fn(val, key);
-           return false;
+       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 map$1(obj, fn) {
-         var res = isList(obj) ? [] : {};
-         pluck(obj, function (v, k) {
-           res[k] = fn(v, k);
-           return false;
-         });
-         return res;
+       function linkErrorObject(d) {
+         return {
+           html: "<a class=\"error_object_link\">".concat(d, "</a>")
+         };
        }
 
-       function pluck(obj, fn) {
-         if (isList(obj)) {
-           for (var i = 0; i < obj.length; i++) {
-             if (fn(obj[i], i)) {
-               return obj[i];
-             }
-           }
+       function linkEntity(d) {
+         return {
+           html: "<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 {
-           for (var key in obj) {
-             if (obj.hasOwnProperty(key)) {
-               if (fn(obj[key], key)) {
-                 return obj[key];
-               }
-             }
-           }
+           return [0, 0];
          }
        }
 
-       function isList(val) {
-         return val != null && typeof val != 'function' && typeof val.length == 'number';
+       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
+
+
+         return angle * 180 / Math.PI;
+       } // Assuming range [0,360)
+
+
+       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 preventCoincident$1(loc, bumpUp) {
+         var coincident = false;
+
+         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);
+
+         return loc;
        }
 
-       function isFunction(val) {
-         return val && {}.toString.call(val) === '[object Function]';
-       }
+       var serviceImproveOSM = {
+         title: 'improveOSM',
+         init: function init() {
+           _mainFileFetcher.get('qa_data').then(function (d) {
+             return _impOsmData = d.improveOSM;
+           });
 
-       function isObject$2(val) {
-         return val && {}.toString.call(val) === '[object Object]';
-       }
+           if (!_cache$1) {
+             this.reset();
+           }
 
-       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);
+           this.event = utilRebind(this, dispatch$6, 'on');
          },
-         // 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);
+         reset: function reset() {
+           if (_cache$1) {
+             Object.values(_cache$1.inflightTile).forEach(abortRequest$5);
            }
 
-           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);
+           _cache$1 = {
+             data: {},
+             loadedTile: {},
+             inflightTile: {},
+             inflightPost: {},
+             closed: {},
+             rtree: new RBush()
+           };
          },
-         namespace: function namespace(_namespace) {
-           return _createStore(this.storage, this.plugins, _namespace);
-         }
-       };
+         loadIssues: function loadIssues(projection) {
+           var _this = this;
 
-       function _warn() {
-         var _console = typeof console == 'undefined' ? null : console;
+           var options = {
+             client: 'iD',
+             status: 'OPEN',
+             zoom: '19' // Use a high zoom so that clusters aren't returned
 
-         if (!_console) {
-           return;
-         }
+           }; // determine the needed tiles to cover the view
 
-         var fn = _console.warn ? _console.warn : _console.log;
-         fn.apply(_console, arguments);
-       }
+           var tiles = tiler$5.zoomExtent([_tileZoom$2, _tileZoom$2]).getTiles(projection); // abort inflight requests that are no longer needed
 
-       function _createStore(storages, plugins, namespace) {
-         if (!namespace) {
-           namespace = '';
-         }
+           abortUnwantedRequests$2(_cache$1, tiles); // issue new requests..
 
-         if (storages && !isList$1(storages)) {
-           storages = [storages];
-         }
+           tiles.forEach(function (tile) {
+             if (_cache$1.loadedTile[tile.id] || _cache$1.inflightTile[tile.id]) return;
 
-         if (plugins && !isList$1(plugins)) {
-           plugins = [plugins];
-         }
+             var _tile$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];
 
-         var namespacePrefix = namespace ? '__storejs_' + namespace + '_' : '';
-         var namespaceRegexp = namespace ? new RegExp('^' + namespacePrefix) : null;
-         var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash
+             var params = Object.assign({}, options, {
+               east: east,
+               south: south,
+               west: west,
+               north: north
+             }); // 3 separate requests to store for each tile
 
-         if (!legalNamespaces.test(namespace)) {
-           throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes');
-         }
+             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];
 
-         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];
+                 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
 
-             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 super_fn() {
-                 if (!oldFn) {
-                   return;
-                 }
+                 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
 
-                 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.
+                     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 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
+                     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
 
+                     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;
 
-             var val = '';
+                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
+                   });
+                 } // Tiles at high zoom == missing roads
 
-             try {
-               val = JSON.parse(strVal);
-             } catch (e) {
-               val = strVal;
-             }
 
-             return val !== undefined ? val : defaultVal;
-           },
-           _addStorage: function _addStorage(storage) {
-             if (this.enabled) {
-               return;
-             }
+                 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 (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.
+                     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
 
-             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.
+                     if (numberOfTrips === -1) {
+                       d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
+                     }
 
+                     _cache$1.data[d.id] = d;
 
-             var seenPlugin = pluck$1(this.plugins, function (seenPlugin) {
-               return plugin === seenPlugin;
-             });
+                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
+                   });
+                 } // Entities at high zoom == turn restrictions
 
-             if (seenPlugin) {
-               return;
-             }
 
-             this.plugins.push(plugin); // Check that the plugin is properly formed
+                 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
 
-             if (!isFunction$1(plugin)) {
-               throw new Error('Plugins must be function values that return objects');
-             }
+                     var loc = preventCoincident$1([point.lon, point.lat], true); // Elements are presented in a strange way
 
-             var pluginProperties = plugin.call(this);
+                     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
 
-             if (!isObject$3(pluginProperties)) {
-               throw new Error('Plugins must return an object of function properties');
-             } // Add the plugin function properties to this store instance.
+                     var _segments$0$points = _slicedToArray(segments[0].points, 2),
+                         p1 = _segments$0$points[0],
+                         p2 = _segments$0$points[1];
 
+                     var dir_of_travel = cardinalDirection(relativeBearing(p1, p2)); // Variables used in the description
 
-             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.');
-               }
+                     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;
 
-               self._assignPluginFnProp(pluginFnProp, propName);
+                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
+
+                     dispatch$6.call('loaded');
+                   });
+                 }
+               })["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;
+                 }
+               });
              });
-           },
-           // 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])');
+             _cache$1.inflightTile[tile.id] = requests;
+           });
+         },
+         getComments: function getComments(item) {
+           var _this2 = this;
 
-             this._addStorage(storage);
+           // If comments already retrieved no need to do so again
+           if (item.comments) {
+             return Promise.resolve(item);
            }
-         };
-         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);
+
+           var key = item.issueKey;
+           var qParams = {};
+
+           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;
            }
-         });
-         each$1(storages, function (storage) {
-           store._addStorage(storage);
-         });
-         each$1(plugins, function (plugin) {
-           store._addPlugin(plugin);
-         });
-         return store;
-       }
 
-       var Global$1 = util.Global;
-       var localStorage_1 = {
-         name: 'localStorage',
-         read: read,
-         write: write,
-         each: each$2,
-         remove: remove$2,
-         clearAll: clearAll
-       };
+           var url = "".concat(_impOsmUrls[key], "/retrieveComments?") + utilQsString(qParams);
 
-       function localStorage$1() {
-         return Global$1.localStorage;
-       }
+           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 read(key) {
-         return localStorage$1().getItem(key);
-       }
+             _this2.replaceItem(item);
+           };
 
-       function write(key, data) {
-         return localStorage$1().setItem(key, data);
-       }
+           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);
+           }
 
-       function each$2(fn) {
-         for (var i = localStorage$1().length - 1; i >= 0; i--) {
-           var key = localStorage$1().key(i);
-           fn(read(key), key);
-         }
-       }
+           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 remove$2(key) {
-         return localStorage$1().removeItem(key);
-       }
 
-       function clearAll() {
-         return localStorage$1().clear();
-       }
+           serviceOsm.userDetails(sendPayload.bind(this));
 
-       // versions 6 and 7, where no localStorage, etc
-       // is available.
+           function sendPayload(err, user) {
+             var _this3 = this;
 
-       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 (err) {
+               return callback(err, d);
+             }
 
-       function read$1(key) {
-         return globalStorage[key];
-       }
+             var key = d.issueKey;
+             var url = "".concat(_impOsmUrls[key], "/comment");
+             var payload = {
+               username: user.display_name,
+               targetIds: [d.identifier]
+             };
 
-       function write$1(key, data) {
-         globalStorage[key] = data;
-       }
+             if (d.newStatus) {
+               payload.status = d.newStatus;
+               payload.text = 'status changed';
+             } // Comment take place of default text
+
+
+             if (d.newComment) {
+               payload.text = d.newComment;
+             }
+
+             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
+                 });
+
+                 _this3.replaceItem(d.update({
+                   comments: comments,
+                   newComment: undefined
+                 }));
+               } else {
+                 _this3.removeItem(d);
+
+                 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;
+                   }
+
+                   _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);
+             });
+           }
+         },
+         // 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$2(encodeIssueRtree$1(issue), true); // true = replace
 
-       function each$3(fn) {
-         for (var i = globalStorage.length - 1; i >= 0; i--) {
-           var key = globalStorage.key(i);
-           fn(globalStorage[key], key);
+           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$2(encodeIssueRtree$1(issue), false); // false = remove
+         },
+         // Used to populate `closed:improveosm:*` changeset tags
+         getClosedCounts: function getClosedCounts() {
+           return _cache$1.closed;
          }
-       }
-
-       function remove$3(key) {
-         return globalStorage.removeItem(key);
-       }
-
-       function clearAll$1() {
-         each$3(function (key, _) {
-           delete globalStorage[key];
-         });
-       }
+       };
 
-       // versions 6 and 7, where no localStorage, sessionStorage, etc
-       // is available.
+       var defaults$5 = {exports: {}};
 
-       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
+       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
        };
-       var storageName = 'storejs';
-       var doc = Global$3.document;
 
-       var _withStorageEl = _makeIEStorageElFunction();
+       var escapeTest = /[&<>"']/;
+       var escapeReplace = /[&<>"']/g;
+       var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
+       var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
+       var escapeReplacements = {
+         '&': '&amp;',
+         '<': '&lt;',
+         '>': '&gt;',
+         '"': '&quot;',
+         "'": '&#39;'
+       };
 
-       var disable = (Global$3.navigator ? Global$3.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x
+       var getEscapeReplacement = function getEscapeReplacement(ch) {
+         return escapeReplacements[ch];
+       };
 
-       function write$2(unfixedKey, data) {
-         if (disable) {
-           return;
+       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 fixedKey = fixKey(unfixedKey);
-
-         _withStorageEl(function (storageEl) {
-           storageEl.setAttribute(fixedKey, data);
-           storageEl.save(storageName);
-         });
+         return html;
        }
 
-       function read$2(unfixedKey) {
-         if (disable) {
-           return;
-         }
-
-         var fixedKey = fixKey(unfixedKey);
-         var res = null;
-
-         _withStorageEl(function (storageEl) {
-           res = storageEl.getAttribute(fixedKey);
-         });
-
-         return res;
-       }
+       var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
 
-       function each$4(callback) {
-         _withStorageEl(function (storageEl) {
-           var attributes = storageEl.XMLDocument.documentElement.attributes;
+       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 ':';
 
-           for (var i = attributes.length - 1; i >= 0; i--) {
-             var attr = attributes[i];
-             callback(storageEl.getAttribute(attr.name), attr.name);
+           if (n.charAt(0) === '#') {
+             return n.charAt(1) === 'x' ? String.fromCharCode(parseInt(n.substring(2), 16)) : String.fromCharCode(+n.substring(1));
            }
-         });
-       }
-
-       function remove$4(unfixedKey) {
-         var fixedKey = fixKey(unfixedKey);
 
-         _withStorageEl(function (storageEl) {
-           storageEl.removeAttribute(fixedKey);
-           storageEl.save(storageName);
+           return '';
          });
        }
 
-       function clearAll$2() {
-         _withStorageEl(function (storageEl) {
-           var attributes = storageEl.XMLDocument.documentElement.attributes;
-           storageEl.load(storageName);
+       var caret = /(^|[^\[])\^/g;
 
-           for (var i = attributes.length - 1; i >= 0; i--) {
-             storageEl.removeAttribute(attributes[i].name);
+       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;
+           },
+           getRegex: function getRegex() {
+             return new RegExp(regex, opt);
            }
+         };
+         return obj;
+       }
 
-           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 nonWordAndColonTest = /[^\w:]/g;
+       var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
 
-       var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");
+       function cleanUrl$1(sanitize, base, href) {
+         if (sanitize) {
+           var prot;
 
-       function fixKey(key) {
-         return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___');
-       }
+           try {
+             prot = decodeURIComponent(unescape$2(href)).replace(nonWordAndColonTest, '').toLowerCase();
+           } catch (e) {
+             return null;
+           }
 
-       function _makeIEStorageElFunction() {
-         if (!doc || !doc.documentElement || !doc.documentElement.addBehavior) {
-           return null;
+           if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
+             return null;
+           }
          }
 
-         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.
+         if (base && !originIndependentUrl.test(href)) {
+           href = resolveUrl$2(base, href);
+         }
 
          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');
+           href = encodeURI(href).replace(/%25/g, '%');
          } 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;
+           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;
-         };
+         return href;
        }
 
-       // 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$4.document;
+       var baseUrls = {};
+       var justDomain = /^[^:]+:\/*[^/]*$/;
+       var protocol = /^([^:]+:)[\s\S]*$/;
+       var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
 
-       function read$3(key) {
-         if (!key || !_has(key)) {
-           return null;
+       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);
+           }
          }
 
-         var regexpStr = "(?:^|.*;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
-         return unescape(doc$1.cookie.replace(new RegExp(regexpStr), "$1"));
-       }
+         base = baseUrls[' ' + base];
+         var relativeBase = base.indexOf(':') === -1;
 
-       function each$5(callback) {
-         var cookies = doc$1.cookie.split(/; ?/g);
+         if (href.substring(0, 2) === '//') {
+           if (relativeBase) {
+             return href;
+           }
 
-         for (var i = cookies.length - 1; i >= 0; i--) {
-           if (!trim$4(cookies[i])) {
-             continue;
+           return base.replace(protocol, '$1') + href;
+         } else if (href.charAt(0) === '/') {
+           if (relativeBase) {
+             return href;
            }
 
-           var kvp = cookies[i].split('=');
-           var key = unescape(kvp[0]);
-           var val = unescape(kvp[1]);
-           callback(val, key);
+           return base.replace(domain, '$1') + href;
+         } else {
+           return base + href;
          }
        }
 
-       function write$3(key, data) {
-         if (!key) {
-           return;
-         }
+       var noopTest$1 = {
+         exec: function noopTest() {}
+       };
 
-         doc$1.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
-       }
+       function merge$2(obj) {
+         var i = 1,
+             target,
+             key;
 
-       function remove$5(key) {
-         if (!key || !_has(key)) {
-           return;
+         for (; i < arguments.length; i++) {
+           target = arguments[i];
+
+           for (key in target) {
+             if (Object.prototype.hasOwnProperty.call(target, key)) {
+               obj[key] = target[key];
+             }
+           }
          }
 
-         doc$1.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
+         return obj;
        }
 
-       function clearAll$3() {
-         each$5(function (_, key) {
-           remove$5(key);
-         });
-       }
+       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 _has(key) {
-         return new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=").test(doc$1.cookie);
-       }
+           while (--curr >= 0 && str[curr] === '\\') {
+             escaped = !escaped;
+           }
 
-       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 (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 sessionStorage() {
-         return Global$5.sessionStorage;
-       }
+         if (cells.length > count) {
+           cells.splice(count);
+         } else {
+           while (cells.length < count) {
+             cells.push('');
+           }
+         }
 
-       function read$4(key) {
-         return sessionStorage().getItem(key);
-       }
+         for (; i < cells.length; i++) {
+           // leading or trailing whitespace is ignored per the gfm spec
+           cells[i] = cells[i].trim().replace(/\\\|/g, '|');
+         }
 
-       function write$4(key, data) {
-         return sessionStorage().setItem(key, data);
-       }
+         return cells;
+       } // Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
+       // /c*$/ is vulnerable to REDOS.
+       // invert: Remove suffix of non-c chars instead. Default falsey.
 
-       function each$6(fn) {
-         for (var i = sessionStorage().length - 1; i >= 0; i--) {
-           var key = sessionStorage().key(i);
-           fn(read$4(key), key);
-         }
-       }
 
-       function remove$6(key) {
-         return sessionStorage().removeItem(key);
-       }
+       function rtrim$1(str, c, invert) {
+         var l = str.length;
 
-       function clearAll$4() {
-         return sessionStorage().clear();
-       }
+         if (l === 0) {
+           return '';
+         } // Length of suffix matching the invert condition.
 
-       // 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 = {};
 
-       function read$5(key) {
-         return memoryStorage[key];
-       }
+         var suffLen = 0; // Step left until we fail to match the invert condition.
 
-       function write$5(key, data) {
-         memoryStorage[key] = data;
-       }
+         while (suffLen < l) {
+           var currChar = str.charAt(l - suffLen - 1);
 
-       function each$7(callback) {
-         for (var key in memoryStorage) {
-           if (memoryStorage.hasOwnProperty(key)) {
-             callback(memoryStorage[key], key);
+           if (currChar === c && !invert) {
+             suffLen++;
+           } else if (currChar !== c && invert) {
+             suffLen++;
+           } else {
+             break;
            }
          }
+
+         return str.substr(0, l - suffLen);
        }
 
-       function remove$7(key) {
-         delete memoryStorage[key];
-       }
-
-       function clearAll$5(key) {
-         memoryStorage = {};
-       }
-
-       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
-       */
-
-       /*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 () {
+       function findClosingBracket$1(str, b) {
+         if (str.indexOf(b[1]) === -1) {
+           return -1;
+         }
 
-         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 l = str.length;
+         var level = 0,
+             i = 0;
 
-         function f(n) {
-           // Format integers to have at least two digits.
-           return n < 10 ? "0" + n : n;
+         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 this_value() {
-           return this.valueOf();
+         return -1;
+       }
+
+       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
 
-         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;
+       function repeatString$1(pattern, count) {
+         if (count < 1) {
+           return '';
          }
 
-         var gap;
-         var indent;
-         var meta;
-         var rep;
+         var result = '';
 
-         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 + "\"";
+         while (count > 1) {
+           if (count & 1) {
+             result += pattern;
+           }
+
+           count >>= 1;
+           pattern += pattern;
          }
 
-         function str(key, holder) {
-           // Produce a string from holder[key].
-           var i; // The loop counter.
+         return result + pattern;
+       }
 
-           var k; // The member key.
+       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 v; // The member value.
+       var defaults$4 = defaults$5.exports.defaults;
+       var rtrim = helpers.rtrim,
+           splitCells = helpers.splitCells,
+           _escape = helpers.escape,
+           findClosingBracket = helpers.findClosingBracket;
 
-           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.
+       function outputLink(cap, link, raw) {
+         var href = link.href;
+         var title = link.title ? _escape(link.title) : null;
+         var text = cap[1].replace(/\\([\[\]])/g, '$1');
 
-           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.
+         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+)(?:```)/);
 
-           if (typeof rep === "function") {
-             value = rep.call(holder, key, value);
-           } // What happens next depends on the value's type.
+         if (matchIndentToCode === null) {
+           return text;
+         }
 
+         var indentToCode = matchIndentToCode[1];
+         return text.split('\n').map(function (node) {
+           var matchIndentInNode = node.match(/^\s+/);
 
-           switch (_typeof(value)) {
-             case "string":
-               return quote(value);
+           if (matchIndentInNode === null) {
+             return node;
+           }
 
-             case "number":
-               // JSON numbers must be finite. Encode non-finite numbers as null.
-               return isFinite(value) ? String(value) : "null";
+           var _matchIndentInNode = _slicedToArray(matchIndentInNode, 1),
+               indentInNode = _matchIndentInNode[0];
 
-             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 (indentInNode.length >= indentToCode.length) {
+             return node.slice(indentToCode.length);
+           }
 
-             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.
+           return node;
+         }).join('\n');
+       }
+       /**
+        * Tokenizer
+        */
 
 
-               gap += indent;
-               partial = []; // Is the value an array?
+       var Tokenizer_1 = /*#__PURE__*/function () {
+         function Tokenizer(options) {
+           _classCallCheck$1(this, Tokenizer);
 
-               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;
+           this.options = options || defaults$4;
+         }
 
-                 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.
+         _createClass$1(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]
+                 };
+               }
 
+               return {
+                 raw: '\n'
+               };
+             }
+           }
+         }, {
+           key: "code",
+           value: function code(src) {
+             var cap = this.rules.block.code.exec(src);
 
-                 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 (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);
 
+             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 (rep && _typeof(rep) === "object") {
-                 length = rep.length;
+             if (cap) {
+               var text = cap[2].trim(); // remove trailing #s
 
-                 for (i = 0; i < length; i += 1) {
-                   if (typeof rep[i] === "string") {
-                     k = rep[i];
-                     v = str(k, value);
+               if (/#$/.test(text)) {
+                 var trimmed = rtrim(text, '#');
 
-                     if (v) {
-                       partial.push(quote(k) + (gap ? ": " : ":") + v);
-                     }
-                   }
+                 if (this.options.pedantic) {
+                   text = trimmed.trim();
+                 } else if (!trimmed || / $/.test(trimmed)) {
+                   // CommonMark requires space before trailing #s
+                   text = trimmed.trim();
                  }
-               } 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);
+               }
 
-                     if (v) {
-                       partial.push(quote(k) + (gap ? ": " : ":") + v);
-                     }
+               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);
+
+             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$/, '').split('\n') : [],
+                 raw: cap[0]
+               };
+
+               if (item.header.length === item.align.length) {
+                 var l = item.align.length;
+                 var i;
+
+                 for (i = 0; i < l; i++) {
+                   if (/^ *-+: *$/.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;
                    }
                  }
-               } // Join all of the member texts together, separated with commas,
-               // and wrap them in braces.
-
 
-               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.
+                 l = item.cells.length;
 
+                 for (i = 0; i < l; i++) {
+                   item.cells[i] = splitCells(item.cells[i], item.header.length);
+                 }
 
-         if (typeof JSON.stringify !== "function") {
-           meta = {
-             // table of character substitutions
-             "\b": "\\b",
-             "\t": "\\t",
-             "\n": "\\n",
-             "\f": "\\f",
-             "\r": "\\r",
-             "\"": "\\\"",
-             "\\": "\\\\"
-           };
+                 return item;
+               }
+             }
+           }
+         }, {
+           key: "hr",
+           value: function hr(src) {
+             var cap = this.rules.block.hr.exec(src);
 
-           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.
+             if (cap) {
+               return {
+                 type: 'hr',
+                 raw: cap[0]
+               };
+             }
+           }
+         }, {
+           key: "blockquote",
+           value: function blockquote(src) {
+             var cap = this.rules.block.blockquote.exec(src);
 
-             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 (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);
 
-             } 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 (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.
 
+               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]);
 
-             rep = replacer;
+               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.
 
-             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.
 
+                 if (i !== l - 1) {
+                   bnext = this.rules.block.listItemStart.exec(itemMatch[i + 1]);
 
-             return str("", {
-               "": value
-             });
-           };
-         } // If the JSON object does not yet have a parse method, give it one.
+                   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;
+                   }
 
+                   bcurr = bnext;
+                 } // Remove the list item's bullet
+                 // so it is seen as the next token.
 
-         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];
+                 space = item.length;
+                 item = item.replace(/^ *([*+-]|\d+[.)]) ?/, ''); // Outdent whatever the
+                 // list item contains. Hacky.
 
-               if (value && _typeof(value) === "object") {
-                 for (k in value) {
-                   if (Object.prototype.hasOwnProperty.call(value, k)) {
-                     v = walk(value, k);
+                 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
 
-                     if (v !== undefined) {
-                       value[k] = v;
-                     } else {
-                       delete value[k];
-                     }
-                   }
-                 }
-               }
 
-               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.
+                 item = rtrim(item, '\n');
 
+                 if (i !== l - 1) {
+                   raw = raw + '\n';
+                 } // Determine whether item is loose or not.
+                 // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
+                 // for discount behavior.
 
-             text = String(text);
-             rx_dangerous.lastIndex = 0;
 
-             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.
+                 loose = next || /\n\n(?!\s*$)/.test(raw);
 
+                 if (i !== l - 1) {
+                   next = raw.slice(-2) === '\n\n';
+                   if (!loose) loose = next;
+                 }
 
-             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.
+                 if (loose) {
+                   list.loose = true;
+                 } // Check for task list items
 
-               return typeof reviver === "function" ? walk({
-                 "": j
-               }, "") : j;
-             } // If the text is not JSON parseable, then a SyntaxError is thrown.
 
+                 if (this.options.gfm) {
+                   istask = /^\[[ xX]\] /.test(item);
+                   ischecked = undefined;
 
-             throw new SyntaxError("JSON.parse");
-           };
-         }
-       })();
+                   if (istask) {
+                     ischecked = item[1] !== ' ';
+                     item = item.replace(/^\[[ xX]\] +/, '');
+                   }
+                 }
 
-       var json2 = json2Plugin;
+                 list.items.push({
+                   type: 'list_item',
+                   raw: raw,
+                   task: istask,
+                   checked: ischecked,
+                   loose: loose,
+                   text: item
+                 });
+               }
 
-       function json2Plugin() {
-         return {};
-       }
+               return list;
+             }
+           }
+         }, {
+           key: "html",
+           value: function html(src) {
+             var cap = this.rules.block.html.exec(src);
 
-       var plugins = [json2];
-       var store_legacy = storeEngine.createStore(all, plugins);
+             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);
 
-       //
-       // 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) {
+               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);
 
+             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 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
+               if (item.header.length === item.align.length) {
+                 item.raw = cap[0];
+                 var l = item.align.length;
+                 var i;
 
-         oauth.authenticated = function () {
-           return !!(token('oauth_token') && token('oauth_token_secret'));
-         };
+                 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;
+                   }
+                 }
 
-         oauth.logout = function () {
-           token('oauth_token', '');
-           token('oauth_token_secret', '');
-           token('oauth_request_token_secret', '');
-           return oauth;
-         }; // TODO: detect lack of click event
+                 l = item.cells.length;
 
+                 for (i = 0; i < l; i++) {
+                   item.cells[i] = splitCells(item.cells[i].replace(/^ *\| *| *\| *$/g, ''), item.header.length);
+                 }
 
-         oauth.authenticate = function (callback) {
-           if (oauth.authenticated()) return callback();
-           oauth.logout(); // ## Getting a request token
+                 return item;
+               }
+             }
+           }
+         }, {
+           key: "lheading",
+           value: function lheading(src) {
+             var cap = this.rules.block.lheading.exec(src);
 
-           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));
+             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);
 
-           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;
+             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);
 
-             if (!popup) {
-               var error = new Error('Popup was blocked');
-               error.status = 'popup-blocked';
-               throw error;
+             if (cap) {
+               return {
+                 type: 'text',
+                 raw: cap[0],
+                 text: cap[0]
+               };
              }
-           } // Request a request token. When this is complete, the popup
-           // window is redirected to OSM's authorization page.
+           }
+         }, {
+           key: "escape",
+           value: function escape(src) {
+             var cap = this.rules.inline.escape.exec(src);
 
+             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);
 
-           ohauth_1.xhr('POST', url, params, null, {}, reqTokenDone);
-           o.loading();
+             if (cap) {
+               if (!inLink && /^<a /i.test(cap[0])) {
+                 inLink = true;
+               } else if (inLink && /^<\/a>/i.test(cap[0])) {
+                 inLink = false;
+               }
 
-           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)
-             });
+               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 (o.singlepage) {
-               location.href = authorize_url;
-             } else {
-               popup.location = authorize_url;
+               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]
+               };
              }
-           } // Called by a function in a landing page, in the popup window. The
-           // window closes itself.
+           }
+         }, {
+           key: "link",
+           value: function link(src) {
+             var cap = this.rules.inline.link.exec(src);
 
+             if (cap) {
+               var trimmedUrl = cap[2].trim();
 
-           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.
+               if (!this.options.pedantic && /^</.test(trimmedUrl)) {
+                 // commonmark requires matching angle brackets
+                 if (!/>$/.test(trimmedUrl)) {
+                   return;
+                 } // ending angle bracket cannot be escaped
 
 
-           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`
+                 var rtrimSlash = rtrim(trimmedUrl.slice(0, -1), '\\');
 
-             ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
-             o.loading();
-           }
+                 if ((trimmedUrl.length - rtrimSlash.length) % 2 === 0) {
+                   return;
+                 }
+               } else {
+                 // find closing parenthesis
+                 var lastParenIndex = findClosingBracket(cap[2], '()');
 
-           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 (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] = '';
+                 }
+               }
 
-         oauth.bringPopupWindowToFront = function () {
-           var brougtPopupToFront = false;
+               var href = cap[2];
+               var title = '';
 
-           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)
-           }
+               if (this.options.pedantic) {
+                 // split pedantic href and title
+                 var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
 
-           return brougtPopupToFront;
-         };
+                 if (link) {
+                   href = link[1];
+                   title = link[3];
+                 }
+               } else {
+                 title = cap[3] ? cap[3].slice(1, -1) : '';
+               }
 
-         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`
+               href = href.trim();
 
-             ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
-             o.loading();
-           }
+               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);
+                 }
+               }
 
-           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);
+               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]);
+             }
            }
+         }, {
+           key: "reflink",
+           value: function reflink(src, links) {
+             var cap;
 
-           get_access_token(oauth_token);
-         }; // # xhr
-         //
-         // A single XMLHttpRequest wrapper that does authenticated calls if the
-         // user has logged in.
+             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 (!link || !link.href) {
+                 var text = cap[0].charAt(0);
+                 return {
+                   type: 'text',
+                   raw: text,
+                   text: text
+                 };
+               }
 
-         oauth.xhr = function (options, callback) {
-           if (!oauth.authenticated()) {
-             if (o.auto) {
-               return oauth.authenticate(run);
-             } else {
-               callback('not authenticated', null);
-               return;
+               return outputLink(cap, link, cap[0]);
              }
-           } else {
-             return run();
            }
+         }, {
+           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
 
-           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 (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] || '';
 
-             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 (!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?)
 
-             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);
-           }
+               maskedSrc = maskedSrc.slice(-1 * src.length + lLength);
 
-           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 ((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__
 
+                 rLength = rDelim.length;
 
-         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 (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
+                   }
+                 }
 
-         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
+                 delimTotal -= rLength;
+                 if (delimTotal > 0) continue; // Haven't found enough closing delimiters
+                 // Remove extra characters. *a*** -> *a*
 
-           o.loading = o.loading || function () {};
+                 rLength = Math.min(rLength, rLength + delimTotal + midDelimTotal); // Create `em` if smallest delimiter has odd char count. *a***
 
-           o.done = o.done || function () {};
+                 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***
 
-           return oauth.preauth(o);
-         }; // 'stamp' an authentication object from `getAuth()`
-         // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
-         // and timestamp
 
+                 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);
 
-         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 (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);
+               }
 
-         var token;
+               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 (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 (cap) {
+               return {
+                 type: 'br',
+                 raw: cap[0]
+               };
+             }
+           }
+         }, {
+           key: "del",
+           value: function del(src) {
+             var cap = this.rules.inline.del.exec(src);
 
-           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 (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 (cap) {
+               var text, href;
 
-         function getAuth(o) {
-           return {
-             oauth_consumer_key: o.oauth_consumer_key,
-             oauth_signature_method: 'HMAC-SHA1'
-           };
-         } // potentially pre-authorize
+               if (cap[2] === '@') {
+                 text = _escape(this.options.mangle ? mangle(cap[1]) : cap[1]);
+                 href = 'mailto:' + text;
+               } else {
+                 text = _escape(cap[1]);
+                 href = text;
+               }
 
+               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;
 
-         oauth.options(o);
-         return oauth;
-       };
+             if (cap = this.rules.inline.url.exec(src)) {
+               var text, href;
 
-       var JXON = new function () {
-         var sValueProp = 'keyValue',
-             sAttributesProp = 'keyAttributes',
-             sAttrPref = '@',
+               if (cap[2] === '@') {
+                 text = _escape(this.options.mangle ? mangle(cap[0]) : cap[0]);
+                 href = 'mailto:' + text;
+               } else {
+                 // do extended autolink path validation
+                 var prevCapZero;
 
-         /* you can customize these values */
-         aCache = [],
-             rIsNull = /^\s*$/,
-             rIsBool = /^(?:true|false)$/i;
+                 do {
+                   prevCapZero = cap[0];
+                   cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
+                 } while (prevCapZero !== cap[0]);
 
-         function parseText(sValue) {
-           if (rIsNull.test(sValue)) {
-             return null;
-           }
+                 text = _escape(cap[0]);
 
-           if (rIsBool.test(sValue)) {
-             return sValue.toLowerCase() === 'true';
-           }
+                 if (cap[1] === 'www.') {
+                   href = 'http://' + text;
+                 } else {
+                   href = text;
+                 }
+               }
 
-           if (isFinite(sValue)) {
-             return parseFloat(sValue);
+               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);
 
-           if (isFinite(Date.parse(sValue))) {
-             return new Date(sValue);
-           }
+             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]);
+               }
 
-           return sValue;
-         }
+               return {
+                 type: 'text',
+                 raw: cap[0],
+                 text: text
+               };
+             }
+           }
+         }]);
 
-         function EmptyTree() {}
+         return Tokenizer;
+       }();
 
-         EmptyTree.prototype.toString = function () {
-           return 'null';
-         };
+       var noopTest = helpers.noopTest,
+           edit = helpers.edit,
+           merge$1 = helpers.merge;
+       /**
+        * Block-Level Grammar
+        */
 
-         EmptyTree.prototype.valueOf = function () {
-           return null;
-         };
+       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
+        */
 
-         function objectify(vValue) {
-           return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
-         }
+       block$1.normal = merge$1({}, block$1);
+       /**
+        * GFM Block Grammar
+        */
 
-         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;
+       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
 
-           if (bChildren) {
-             for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
-               oNode = oParentNode.childNodes.item(nItem);
+       });
+       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)
+        */
 
-               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) */
+       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 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 _
 
-           var nLevelEnd = aCache.length,
-               vBuiltVal = parseText(sCollectedTxt);
+         },
+         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 (!bHighVerb && (bChildren || bAttributes)) {
-             vResult = nVerb === 0 ? objectify(vBuiltVal) : {};
-           }
+       inline$1.normal = merge$1({}, inline$1);
+       /**
+        * Pedantic Inline Grammar
+        */
 
-           for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
-             sProp = aCache[nElId].nodeName.toLowerCase();
-             vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);
+       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
+        */
 
-             if (vResult.hasOwnProperty(sProp)) {
-               if (vResult[sProp].constructor !== Array) {
-                 vResult[sProp] = [vResult[sProp]];
-               }
+       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
+        */
 
-               vResult[sProp].push(vContent);
-             } else {
-               vResult[sProp] = vContent;
-               nLength++;
-             }
-           }
+       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 (bAttributes) {
-             var nAttrLen = oParentNode.attributes.length,
-                 sAPrefix = bNesteAttr ? '' : sAttrPref,
-                 oAttrParent = bNesteAttr ? {} : vResult;
+       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
+        */
 
-             for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
-               oAttrib = oParentNode.attributes.item(nAttrib);
-               oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
-             }
+       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
+        */
 
-             if (bNesteAttr) {
-               if (bFreeze) {
-                 Object.freeze(oAttrParent);
-               }
 
-               vResult[sAttributesProp] = oAttrParent;
-               nLength -= nAttrLen - 1;
-             }
-           }
+       function mangle(text) {
+         var out = '',
+             i,
+             ch;
+         var l = text.length;
 
-           if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
-             vResult[sValueProp] = vBuiltVal;
-           } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
-             vResult = vBuiltVal;
-           }
+         for (i = 0; i < l; i++) {
+           ch = text.charCodeAt(i);
 
-           if (bFreeze && (bHighVerb || nLength > 0)) {
-             Object.freeze(vResult);
+           if (Math.random() > 0.5) {
+             ch = 'x' + ch.toString(16);
            }
 
-           aCache.length = nLevelStart;
-           return vResult;
+           out += '&#' + ch + ';';
          }
 
-         function loadObjTree(oXMLDoc, oParentEl, oParentObj) {
-           var vValue, oChild;
+         return out;
+       }
+       /**
+        * Block Lexer
+        */
 
-           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 (var sName in oParentObj) {
-             vValue = oParentObj[sName];
+       var Lexer_1 = /*#__PURE__*/function () {
+         function Lexer(options) {
+           _classCallCheck$1(this, Lexer);
 
-             if (isFinite(sName) || vValue instanceof Function) {
-               continue;
-             }
-             /* verbosity level is 0 */
+           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
+           };
 
+           if (this.options.pedantic) {
+             rules.block = block.pedantic;
+             rules.inline = inline.pedantic;
+           } else if (this.options.gfm) {
+             rules.block = block.gfm;
 
-             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);
-               }
+             if (this.options.breaks) {
+               rules.inline = inline.breaks;
              } else {
-               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);
+               rules.inline = inline.gfm;
              }
            }
+
+           this.tokenizer.rules = rules;
          }
+         /**
+          * Expose Rules
+          */
 
-         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 createObjTree(oXMLParent, _nVerb, bFreeze || false, arguments.length > 3 ? bNesteAttributes : _nVerb === 3);
-         };
+         _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
+            */
 
-         this.unbuild = function (oObjTree) {
-           var oNewDoc = document.implementation.createDocument('', '', null);
-           loadObjTree(oNewDoc, oNewDoc, oObjTree);
-           return oNewDoc;
-         };
+         }, {
+           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;
 
-         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.options.pedantic) {
+               src = src.replace(/^ +$/gm, '');
+             }
 
-       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
+             var token, i, l, lastToken;
 
-       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: {}
-       };
+             while (src) {
+               // newline
+               if (token = this.tokenizer.space(src)) {
+                 src = src.substring(token.raw.length);
 
-       var _cachedApiStatus;
+                 if (token.type) {
+                   tokens.push(token);
+                 }
 
-       var _changeset = {};
+                 continue;
+               } // code
 
-       var _deferred = new Set();
 
-       var _connectionID = 1;
-       var _tileZoom$3 = 16;
-       var _noteZoom = 12;
+               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.
 
-       var _rateLimitError;
+                 if (lastToken && lastToken.type === 'paragraph') {
+                   lastToken.raw += '\n' + token.raw;
+                   lastToken.text += '\n' + token.text;
+                 } else {
+                   tokens.push(token);
+                 }
 
-       var _userChangesets;
+                 continue;
+               } // fences
 
-       var _userDetails;
 
-       var _off; // set a default but also load this from the API status
+               if (token = this.tokenizer.fences(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // heading
 
 
-       var _maxWayNodes = 2000;
+               if (token = this.tokenizer.heading(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // table no leading pipe (gfm)
 
-       function authLoading() {
-         dispatch$6.call('authLoading');
-       }
 
-       function authDone() {
-         dispatch$6.call('authDone');
-       }
+               if (token = this.tokenizer.nptable(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // hr
 
-       function abortRequest$5(controllerOrXHR) {
-         if (controllerOrXHR) {
-           controllerOrXHR.abort();
-         }
-       }
 
-       function hasInflightRequests(cache) {
-         return Object.keys(cache.inflight).length;
-       }
+               if (token = this.tokenizer.hr(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // blockquote
 
-       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.blockquote(src)) {
+                 src = src.substring(token.raw.length);
+                 token.tokens = this.blockTokens(token.text, [], top);
+                 tokens.push(token);
+                 continue;
+               } // list
 
-       function getNodes(obj) {
-         var elems = obj.getElementsByTagName('nd');
-         var nodes = new Array(elems.length);
 
-         for (var i = 0, l = elems.length; i < l; i++) {
-           nodes[i] = 'n' + elems[i].attributes.ref.value;
-         }
+               if (token = this.tokenizer.list(src)) {
+                 src = src.substring(token.raw.length);
+                 l = token.items.length;
 
-         return nodes;
-       }
+                 for (i = 0; i < l; i++) {
+                   token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
+                 }
 
-       function getNodesJSON(obj) {
-         var elems = obj.nodes;
-         var nodes = new Array(elems.length);
+                 tokens.push(token);
+                 continue;
+               } // html
 
-         for (var i = 0, l = elems.length; i < l; i++) {
-           nodes[i] = 'n' + elems[i];
-         }
 
-         return nodes;
-       }
+               if (token = this.tokenizer.html(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // def
 
-       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 (top && (token = this.tokenizer.def(src))) {
+                 src = src.substring(token.raw.length);
 
-         return tags;
-       }
+                 if (!this.tokens.links[token.tag]) {
+                   this.tokens.links[token.tag] = {
+                     href: token.href,
+                     title: token.title
+                   };
+                 }
 
-       function getMembers(obj) {
-         var elems = obj.getElementsByTagName('member');
-         var members = new Array(elems.length);
+                 continue;
+               } // table (gfm)
 
-         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.table(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // lheading
 
-       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 (token = this.tokenizer.lheading(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // top-level paragraph
 
-         return members;
-       }
 
-       function getVisible(attrs) {
-         return !attrs.visible || attrs.visible.value !== 'false';
-       }
+               if (top && (token = this.tokenizer.paragraph(src))) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // text
 
-       function parseComments(comments) {
-         var parsedComments = []; // for each comment
 
-         for (var i = 0; i < comments.length; i++) {
-           var comment = comments[i];
+               if (token = this.tokenizer.text(src)) {
+                 src = src.substring(token.raw.length);
+                 lastToken = tokens[tokens.length - 1];
 
-           if (comment.nodeName === 'comment') {
-             var childNodes = comment.childNodes;
-             var parsedComment = {};
+                 if (lastToken && lastToken.type === 'text') {
+                   lastToken.raw += '\n' + token.raw;
+                   lastToken.text += '\n' + 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;
            }
-         }
-
-         return parsedComments;
-       }
-
-       function encodeNoteRtree(note) {
-         return {
-           minX: note.loc[0],
-           minY: note.loc[1],
-           maxX: note.loc[0],
-           maxY: note.loc[1],
-           data: note
-         };
-       }
+         }, {
+           key: "inline",
+           value: function inline(tokens) {
+             var i, j, k, l2, row, token;
+             var l = tokens.length;
 
-       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)
-           });
-         }
-       };
+             for (i = 0; i < l; i++) {
+               token = tokens[i];
 
-       function parseJSON(payload, callback, options) {
-         options = Object.assign({
-           skipSeen: true
-         }, options);
+               switch (token.type) {
+                 case 'paragraph':
+                 case 'text':
+                 case 'heading':
+                   {
+                     token.tokens = [];
+                     this.inlineTokens(token.text, token.tokens);
+                     break;
+                   }
 
-         if (!payload) {
-           return callback({
-             message: 'No JSON',
-             status: -1
-           });
-         }
+                 case 'table':
+                   {
+                     token.tokens = {
+                       header: [],
+                       cells: []
+                     }; // header
 
-         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;
+                     l2 = token.header.length;
 
-           for (var i = 0; i < children.length; i++) {
-             result = parseChild(children[i]);
-             if (result) results.push(result);
-           }
+                     for (j = 0; j < l2; j++) {
+                       token.tokens.header[j] = [];
+                       this.inlineTokens(token.header[j], token.tokens.header[j]);
+                     } // cells
 
-           callback(null, results);
-         });
 
-         _deferred.add(handle);
+                     l2 = token.cells.length;
 
-         function parseChild(child) {
-           var parser = jsonparsers[child.type];
-           if (!parser) return null;
-           var uid;
-           uid = osmEntity.id.fromOSM(child.type, child.id);
+                     for (j = 0; j < l2; j++) {
+                       row = token.cells[j];
+                       token.tokens.cells[j] = [];
 
-           if (options.skipSeen) {
-             if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
+                       for (k = 0; k < row.length; k++) {
+                         token.tokens.cells[j][k] = [];
+                         this.inlineTokens(row[k], token.tokens.cells[j][k]);
+                       }
+                     }
 
-             _tileCache.seen[uid] = true;
-           }
+                     break;
+                   }
 
-           return parser(child, uid);
-         }
-       }
+                 case 'blockquote':
+                   {
+                     this.inline(token.tokens);
+                     break;
+                   }
 
-       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
+                 case 'list':
+                   {
+                     l2 = token.items.length;
 
-           var coincident = false;
-           var epsilon = 0.00001;
+                     for (j = 0; j < l2; j++) {
+                       this.inline(token.items[j].tokens);
+                     }
 
-           do {
-             if (coincident) {
-               props.loc = geoVecAdd(props.loc, [epsilon, epsilon]);
+                     break;
+                   }
+               }
              }
 
-             var bbox = geoExtent(props.loc).bbox();
-             coincident = _noteCache.rtree.search(bbox).length;
-           } while (coincident); // parse note contents
-
+             return tokens;
+           }
+           /**
+            * Lexing/Compiling
+            */
 
-           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
+         }, {
+           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
 
-             if (nodeName === 'comments') {
-               props[nodeName] = parseComments(node.childNodes);
-             } else {
-               props[nodeName] = node.textContent;
-             }
-           }
+             var maskedSrc = src;
+             var match;
+             var keepPrevChar, prevChar; // Mask out reflinks
 
-           var note = new osmNote(props);
-           var item = encodeNoteRtree(note);
-           _noteCache.note[note.id] = note;
+             if (this.tokens.links) {
+               var links = Object.keys(this.tokens.links);
 
-           _noteCache.rtree.insert(item);
+               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
 
-           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');
 
-           if (img && img[0] && img[0].getAttribute('href')) {
-             user.image_url = img[0].getAttribute('href');
-           }
+             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 changesets = obj.getElementsByTagName('changesets');
 
-           if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
-             user.changesets_count = changesets[0].getAttribute('count');
-           }
+             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 blocks = obj.getElementsByTagName('blocks');
+             while (src) {
+               if (!keepPrevChar) {
+                 prevChar = '';
+               }
 
-           if (blocks && blocks[0]) {
-             var received = blocks[0].getElementsByTagName('received');
+               keepPrevChar = false; // escape
 
-             if (received && received[0] && received[0].getAttribute('active')) {
-               user.active_blocks = received[0].getAttribute('active');
-             }
-           }
+               if (token = this.tokenizer.escape(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // tag
 
-           _userCache.user[uid] = user;
-           delete _userCache.toLoad[uid];
-           return user;
-         }
-       };
 
-       function parseXML(xml, callback, options) {
-         options = Object.assign({
-           skipSeen: true
-         }, options);
+               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 (!xml || !xml.childNodes) {
-           return callback({
-             message: 'No XML',
-             status: -1
-           });
-         }
+                 if (_lastToken && token.type === 'text' && _lastToken.type === 'text') {
+                   _lastToken.raw += token.raw;
+                   _lastToken.text += token.text;
+                 } else {
+                   tokens.push(token);
+                 }
 
-         var root = xml.childNodes[0];
-         var children = root.childNodes;
-         var handle = window.requestIdleCallback(function () {
-           var results = [];
-           var result;
+                 continue;
+               } // link
 
-           for (var i = 0; i < children.length; i++) {
-             result = parseChild(children[i]);
-             if (result) results.push(result);
-           }
 
-           callback(null, results);
-         });
+               if (token = this.tokenizer.link(src)) {
+                 src = src.substring(token.raw.length);
 
-         _deferred.add(handle);
+                 if (token.type === 'link') {
+                   token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+                 }
 
-         function parseChild(child) {
-           var parser = parsers[child.nodeName];
-           if (!parser) return null;
-           var uid;
+                 tokens.push(token);
+                 continue;
+               } // reflink, nolink
 
-           if (child.nodeName === 'user') {
-             uid = child.attributes.id.value;
 
-             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);
+               if (token = this.tokenizer.reflink(src, this.tokens.links)) {
+                 src = src.substring(token.raw.length);
+                 var _lastToken2 = tokens[tokens.length - 1];
 
-             if (options.skipSeen) {
-               if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
+                 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);
+                 }
 
-               _tileCache.seen[uid] = true;
-             }
-           }
+                 continue;
+               } // em & strong
 
-           return parser(child, uid);
-         }
-       } // replace or remove note from rtree
 
+               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
 
-       function updateRtree$3(item, replace) {
-         _noteCache.rtree.remove(item, function isEql(a, b) {
-           return a.data.id === b.data.id;
-         });
 
-         if (replace) {
-           _noteCache.rtree.insert(item);
-         }
-       }
+               if (token = this.tokenizer.codespan(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // br
 
-       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();
-             }
 
-             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 (token = this.tokenizer.br(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // del (gfm)
 
-       var serviceOsm = {
-         init: function init() {
-           utilRebind(this, dispatch$6, '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$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;
+               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
 
-           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..
+               if (token = this.tokenizer.autolink(src, mangle)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // url (gfm)
 
-             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 (!inLink && (token = this.tokenizer.url(src, mangle))) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // text
+
+
+               if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
+                 src = src.substring(token.raw.length);
+
+                 if (token.raw.slice(-1) !== '_') {
+                   // Track prevChar before string of ____ started
+                   prevChar = token.raw.slice(-1);
+                 }
+
+                 keepPrevChar = true;
+                 lastToken = tokens[tokens.length - 1];
+
+                 if (lastToken && lastToken.type === 'text') {
+                   lastToken.raw += token.raw;
+                   lastToken.text += token.text;
+                 } else {
+                   tokens.push(token);
+                 }
+
+                 continue;
                }
 
-               if (callback) {
-                 if (err) {
-                   return callback(err);
+               if (src) {
+                 var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
+
+                 if (this.options.silent) {
+                   console.error(errMsg);
+                   break;
                  } else {
-                   if (path.indexOf('.json') !== -1) {
-                     return parseJSON(payload, callback, options);
-                   } else {
-                     return parseXML(payload, callback, options);
-                   }
+                   throw new Error(errMsg);
                  }
                }
              }
+
+             return tokens;
+           }
+         }], [{
+           key: "rules",
+           get: function get() {
+             return {
+               block: block,
+               inline: inline
+             };
            }
+           /**
+            * Static Lex Method
+            */
 
-           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
+         }, {
+           key: "lex",
+           value: function lex(src, options) {
+             var lexer = new Lexer(options);
+             return lexer.lex(src);
+           }
+           /**
+            * Static Lex Inline Method
+            */
 
-               var match = err.message.match(/^\d{3}/);
+         }, {
+           key: "lexInline",
+           value: function lexInline(src, options) {
+             var lexer = new Lexer(options);
+             return lexer.inlineTokens(src);
+           }
+         }]);
 
-               if (match) {
-                 done({
-                   status: +match[0],
-                   statusText: err.message
-                 });
-               } else {
-                 done(err.message);
+         return Lexer;
+       }();
+
+       var defaults$2 = defaults$5.exports.defaults;
+       var cleanUrl = helpers.cleanUrl,
+           escape$2 = helpers.escape;
+       /**
+        * Renderer
+        */
+
+       var Renderer_1 = /*#__PURE__*/function () {
+         function Renderer(options) {
+           _classCallCheck$1(this, Renderer);
+
+           this.options = options || defaults$2;
+         }
+
+         _createClass$1(Renderer, [{
+           key: "code",
+           value: function code(_code, infostring, escaped) {
+             var lang = (infostring || '').match(/\S*/)[0];
+
+             if (this.options.highlight) {
+               var out = this.options.highlight(_code, lang);
+
+               if (out != null && out !== _code) {
+                 escaped = true;
+                 _code = out;
                }
-             });
-             return controller;
+             }
+
+             _code = _code.replace(/\n$/, '') + '\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';
            }
-         },
-         // 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
+         }, {
+           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
 
-             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;
 
-           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));
+             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
 
-           function createdChangeset(err, changesetID) {
-             _changeset.inflight = null;
+         }, {
+           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);
 
-             if (err) {
-               return callback(err, changeset);
+             if (href === null) {
+               return text;
              }
 
-             _changeset.open = changesetID;
-             changeset = changeset.update({
-               id: changesetID
-             }); // Upload the changeset..
+             var out = '<a href="' + escape$2(href) + '"';
 
-             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));
+             if (title) {
+               out += ' title="' + title + '"';
+             }
+
+             out += '>' + text + '</a>';
+             return out;
            }
+         }, {
+           key: "image",
+           value: function image(href, title, text) {
+             href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);
 
-           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
+             if (href === null) {
+               return text;
+             }
 
-             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.
+             var out = '<img src="' + href + '" alt="' + text + '"';
 
-             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;
-               });
-             }
-           }
-         },
-         // 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 (title) {
+               out += ' title="' + title + '"';
              }
-           });
 
-           if (cached.length || !this.authenticated()) {
-             callback(undefined, cached);
-             if (!this.authenticated()) return; // require auth
+             out += this.options.xhtml ? '/>' : '>';
+             return out;
+           }
+         }, {
+           key: "text",
+           value: function text(_text) {
+             return _text;
            }
+         }]);
 
-           utilArrayChunk(toLoad, 150).forEach(function (arr) {
-             oauth.xhr({
-               method: 'GET',
-               path: '/api/0.6/users?users=' + arr.join()
-             }, wrapcb(this, done, _connectionID));
-           }.bind(this));
+         return Renderer;
+       }();
 
-           function done(err, xml) {
-             if (err) {
-               return callback(err);
-             }
+       var TextRenderer_1 = /*#__PURE__*/function () {
+         function TextRenderer() {
+           _classCallCheck$1(this, TextRenderer);
+         }
 
-             var options = {
-               skipSeen: true
-             };
-             return parseXML(xml, function (err, results) {
-               if (err) {
-                 return callback(err);
-               } else {
-                 return callback(undefined, results);
-               }
-             }, options);
+         _createClass$1(TextRenderer, [{
+           key: "strong",
+           value: // no need for block level renderers
+           function strong(text) {
+             return text;
            }
-         },
-         // 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]);
+         }, {
+           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 '';
            }
+         }]);
 
-           oauth.xhr({
-             method: 'GET',
-             path: '/api/0.6/user/' + uid
-           }, wrapcb(this, done, _connectionID));
+         return TextRenderer;
+       }();
+
+       var Slugger_1 = /*#__PURE__*/function () {
+         function Slugger() {
+           _classCallCheck$1(this, Slugger);
+
+           this.seen = {};
+         }
+
+         _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
+            */
+
+         }, {
+           key: "getNextSafeSlug",
+           value: function getNextSafeSlug(originalSlug, isDryRun) {
+             var slug = originalSlug;
+             var occurenceAccumulator = 0;
+
+             if (this.seen.hasOwnProperty(slug)) {
+               occurenceAccumulator = this.seen[originalSlug];
 
-           function done(err, xml) {
-             if (err) {
-               return callback(err);
+               do {
+                 occurenceAccumulator++;
+                 slug = originalSlug + '-' + occurenceAccumulator;
+               } while (this.seen.hasOwnProperty(slug));
              }
 
-             var options = {
-               skipSeen: true
-             };
-             return parseXML(xml, function (err, results) {
-               if (err) {
-                 return callback(err);
-               } else {
-                 return callback(undefined, results[0]);
-               }
-             }, options);
+             if (!isDryRun) {
+               this.seen[originalSlug] = occurenceAccumulator;
+               this.seen[slug] = 0;
+             }
+
+             return slug;
            }
-         },
-         // 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);
+           /**
+            * 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);
            }
+         }]);
 
-           oauth.xhr({
-             method: 'GET',
-             path: '/api/0.6/user/details'
-           }, wrapcb(this, done, _connectionID));
+         return Slugger;
+       }();
 
-           function done(err, xml) {
-             if (err) {
-               return callback(err);
-             }
+       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 options = {
-               skipSeen: false
-             };
-             return parseXML(xml, function (err, results) {
-               if (err) {
-                 return callback(err);
-               } else {
-                 _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);
-           }
+       var Parser_1 = /*#__PURE__*/function () {
+         function Parser(options) {
+           _classCallCheck$1(this, Parser);
 
-           this.userDetails(wrapcb(this, gotDetails, _connectionID));
+           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
+          */
 
-           function gotDetails(err, user) {
-             if (err) {
-               return callback(err);
-             }
 
-             oauth.xhr({
-               method: 'GET',
-               path: '/api/0.6/changesets?user=' + user.id
-             }, wrapcb(this, done, _connectionID));
-           }
+         _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;
 
-           function done(err, xml) {
-             if (err) {
-               return callback(err);
-             }
+             for (i = 0; i < l; i++) {
+               token = tokens[i];
 
-             _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);
-           });
+               switch (token.type) {
+                 case 'space':
+                   {
+                     continue;
+                   }
 
-           function done(err, xml) {
-             if (err) {
-               // the status is null if no response could be retrieved
-               return callback(err, null);
-             } // update blocklists
+                 case 'hr':
+                   {
+                     out += this.renderer.hr();
+                     continue;
+                   }
 
+                 case 'heading':
+                   {
+                     out += this.renderer.heading(this.parseInline(token.tokens), token.depth, unescape$1(this.parseInline(token.tokens, this.textRenderer)), this.slugger);
+                     continue;
+                   }
 
-             var elements = xml.getElementsByTagName('blacklist');
-             var regexes = [];
+                 case 'code':
+                   {
+                     out += this.renderer.code(token.text, token.lang, token.escaped);
+                     continue;
+                   }
 
-             for (var i = 0; i < elements.length; i++) {
-               var regexString = elements[i].getAttribute('regex'); // needs unencode?
+                 case 'table':
+                   {
+                     header = ''; // header
 
-               if (regexString) {
-                 try {
-                   var regex = new RegExp(regexString);
-                   regexes.push(regex);
-                 } catch (e) {
-                   /* noop */
-                 }
-               }
-             }
+                     cell = '';
+                     l2 = token.header.length;
 
-             if (regexes.length) {
-               _imageryBlocklists = regexes;
-             }
+                     for (j = 0; j < l2; j++) {
+                       cell += this.renderer.tablecell(this.parseInline(token.tokens.header[j]), {
+                         header: true,
+                         align: token.align[j]
+                       });
+                     }
 
-             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);
-           }
+                     header += this.renderer.tablerow(cell);
+                     body = '';
+                     l2 = token.cells.length;
 
-           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
+                     for (j = 0; j < l2; j++) {
+                       row = token.tokens.cells[j];
+                       cell = '';
+                       l3 = row.length;
 
-           var tiles = tiler$5.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection); // abort inflight requests that are no longer needed
+                       for (k = 0; k < l3; k++) {
+                         cell += this.renderer.tablecell(this.parseInline(row[k]), {
+                           header: false,
+                           align: token.align[k]
+                         });
+                       }
 
-           var hadRequests = hasInflightRequests(_tileCache);
-           abortUnwantedRequests$3(_tileCache, tiles);
+                       body += this.renderer.tablerow(cell);
+                     }
 
-           if (hadRequests && !hasInflightRequests(_tileCache)) {
-             dispatch$6.call('loaded'); // stop the spinner
-           } // issue new requests..
+                     out += this.renderer.table(header, body);
+                     continue;
+                   }
 
+                 case 'blockquote':
+                   {
+                     body = this.parse(token.tokens);
+                     out += this.renderer.blockquote(body);
+                     continue;
+                   }
 
-           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;
+                 case 'list':
+                   {
+                     ordered = token.ordered;
+                     start = token.start;
+                     loose = token.loose;
+                     l2 = token.items.length;
+                     body = '';
 
-           if (!hasInflightRequests(_tileCache)) {
-             dispatch$6.call('loading'); // start the spinner
-           }
+                     for (j = 0; j < l2; j++) {
+                       item = token.items[j];
+                       checked = item.checked;
+                       task = item.task;
+                       itemBody = '';
 
-           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 (item.task) {
+                         checkbox = this.renderer.checkbox(checked);
 
-           function tileCallback(err, parsed) {
-             delete _tileCache.inflight[tile.id];
+                         if (loose) {
+                           if (item.tokens.length > 0 && item.tokens[0].type === 'text') {
+                             item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;
 
-             if (!err) {
-               delete _tileCache.toLoad[tile.id];
-               _tileCache.loaded[tile.id] = true;
-               var bbox = tile.extent.bbox();
-               bbox.id = tile.id;
+                             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;
+                         }
+                       }
 
-               _tileCache.rtree.insert(bbox);
-             }
+                       itemBody += this.parse(item.tokens, loose);
+                       body += this.renderer.listitem(itemBody, task, checked);
+                     }
 
-             if (callback) {
-               callback(err, Object.assign({
-                 data: parsed
-               }, tile));
-             }
+                     out += this.renderer.list(body, ordered, start);
+                     continue;
+                   }
 
-             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=';
+                 case 'html':
+                   {
+                     // TODO parse inline content if parameter markdown=1
+                     out += this.renderer.html(token.text);
+                     continue;
+                   }
 
-           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
+                 case 'paragraph':
+                   {
+                     out += this.renderer.paragraph(this.parseInline(token.tokens));
+                     continue;
+                   }
 
+                 case 'text':
+                   {
+                     body = token.tokens ? this.parseInline(token.tokens) : token.text;
 
-           var tiles = tiler$5.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection); // abort inflight requests that are no longer needed
+                     while (i + 1 < l && tokens[i + 1].type === 'text') {
+                       token = tokens[++i];
+                       body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
+                     }
 
-           abortUnwantedRequests$3(_noteCache, tiles); // issue new requests..
+                     out += top ? this.renderer.paragraph(body) : body;
+                     continue;
+                   }
 
-           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];
+                 default:
+                   {
+                     var errMsg = 'Token with "' + token.type + '" type was not found.';
 
-               if (!err) {
-                 _noteCache.loaded[tile.id] = true;
+                     if (this.options.silent) {
+                       console.error(errMsg);
+                       return;
+                     } else {
+                       throw new Error(errMsg);
+                     }
+                   }
                }
+             }
 
-               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);
+             return out;
            }
+           /**
+            * Parse Inline Tokens
+            */
 
-           if (_noteCache.inflightPost[note.id]) {
-             return callback({
-               message: 'Note update already inflight',
-               status: -2
-             }, note);
-           }
+         }, {
+           key: "parseInline",
+           value: function parseInline(tokens, renderer) {
+             renderer = renderer || this.renderer;
+             var out = '',
+                 i,
+                 token;
+             var l = tokens.length;
 
-           if (!note.loc[0] || !note.loc[1] || !note.newComment) return; // location & description required
+             for (i = 0; i < l; i++) {
+               token = tokens[i];
 
-           var comment = note.newComment;
+               switch (token.type) {
+                 case 'escape':
+                   {
+                     out += renderer.text(token.text);
+                     break;
+                   }
 
-           if (note.newCategory && note.newCategory !== 'None') {
-             comment += ' #' + note.newCategory;
-           }
+                 case 'html':
+                   {
+                     out += renderer.html(token.text);
+                     break;
+                   }
 
-           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));
+                 case 'link':
+                   {
+                     out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
+                     break;
+                   }
 
-           function done(err, xml) {
-             delete _noteCache.inflightPost[note.id];
+                 case 'image':
+                   {
+                     out += renderer.image(token.href, token.title, token.text);
+                     break;
+                   }
+
+                 case 'strong':
+                   {
+                     out += renderer.strong(this.parseInline(token.tokens, renderer));
+                     break;
+                   }
+
+                 case 'em':
+                   {
+                     out += renderer.em(this.parseInline(token.tokens, renderer));
+                     break;
+                   }
+
+                 case 'codespan':
+                   {
+                     out += renderer.codespan(token.text);
+                     break;
+                   }
+
+                 case 'br':
+                   {
+                     out += renderer.br();
+                     break;
+                   }
+
+                 case 'del':
+                   {
+                     out += renderer.del(this.parseInline(token.tokens, renderer));
+                     break;
+                   }
 
-             if (err) {
-               return callback(err);
-             } // we get the updated note back, remove from caches and reparse..
+                 case 'text':
+                   {
+                     out += renderer.text(token.text);
+                     break;
+                   }
 
+                 default:
+                   {
+                     var errMsg = 'Token with "' + token.type + '" type was not found.';
 
-             this.removeNote(note);
-             var options = {
-               skipSeen: false
-             };
-             return parseXML(xml, function (err, results) {
-               if (err) {
-                 return callback(err);
-               } else {
-                 return callback(undefined, results[0]);
+                     if (this.options.silent) {
+                       console.error(errMsg);
+                       return;
+                     } else {
+                       throw new Error(errMsg);
+                     }
+                   }
                }
-             }, 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);
+             return out;
            }
-
-           var action;
-
-           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
+         }], [{
+           key: "parse",
+           value: function parse(tokens, options) {
+             var parser = new Parser(options);
+             return parser.parse(tokens);
            }
+           /**
+            * Static Parse Inline Method
+            */
 
-           var path = '/api/0.6/notes/' + note.id + '/' + action;
-
-           if (note.newComment) {
-             path += '?' + utilQsString({
-               text: note.newComment
-             });
+         }, {
+           key: "parseInline",
+           value: function parseInline(tokens, options) {
+             var parser = new Parser(options);
+             return parser.parseInline(tokens);
            }
+         }]);
 
-           _noteCache.inflightPost[note.id] = oauth.xhr({
-             method: 'POST',
-             path: path
-           }, wrapcb(this, done, _connectionID));
+         return Parser;
+       }();
 
-           function done(err, xml) {
-             delete _noteCache.inflightPost[note.id];
+       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
+        */
 
-             if (err) {
-               return callback(err);
-             } // we get the updated note back, remove from caches and reparse..
+       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 (typeof src !== 'string') {
+           throw new Error('marked(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+         }
 
-             this.removeNote(note); // update closed note cache - used to populate `closed:note` changeset tag
+         if (typeof opt === 'function') {
+           callback = opt;
+           opt = null;
+         }
 
-             if (action === 'close') {
-               _noteCache.closed[note.id] = true;
-             } else if (action === 'reopen') {
-               delete _noteCache.closed[note.id];
-             }
+         opt = merge({}, marked.defaults, opt || {});
+         checkSanitizeDeprecation(opt);
 
-             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
+         if (callback) {
+           var highlight = opt.highlight;
+           var tokens;
 
-           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 {
+             tokens = Lexer.lex(src, opt);
+           } catch (e) {
+             return callback(e);
            }
 
-           if (!arguments.length) {
-             return {
-               tile: cloneCache(_tileCache),
-               note: cloneCache(_noteCache),
-               user: cloneCache(_userCache)
-             };
-           } // access caches directly for testing (e.g., loading notes rtree)
+           var done = function done(err) {
+             var out;
 
+             if (!err) {
+               try {
+                 if (opt.walkTokens) {
+                   marked.walkTokens(tokens, opt.walkTokens);
+                 }
 
-           if (obj === 'get') {
-             return {
-               tile: _tileCache,
-               note: _noteCache,
-               user: _userCache
-             };
-           }
+                 out = Parser.parse(tokens, opt);
+               } catch (e) {
+                 err = e;
+               }
+             }
 
-           if (obj.tile) {
-             _tileCache = obj.tile;
-             _tileCache.inflight = {};
-           }
+             opt.highlight = highlight;
+             return err ? callback(err) : callback(null, out);
+           };
 
-           if (obj.note) {
-             _noteCache = obj.note;
-             _noteCache.inflight = {};
-             _noteCache.inflightPost = {};
+           if (!highlight || highlight.length < 3) {
+             return done();
            }
 
-           if (obj.user) {
-             _userCache = obj.user;
-           }
+           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);
+                   }
 
-           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;
+                   if (code != null && code !== token.text) {
+                     token.text = code;
+                     token.escaped = true;
+                   }
 
-           function done(err, res) {
-             if (err) {
-               if (callback) callback(err);
-               return;
-             }
+                   pending--;
 
-             if (that.getConnectionId() !== cid) {
-               if (callback) callback({
-                 message: 'Connection Switched',
-                 status: -1
-               });
-               return;
+                   if (pending === 0) {
+                     done();
+                   }
+                 });
+               }, 0);
              }
+           });
 
-             _rateLimitError = undefined;
-             dispatch$6.call('change');
-             if (callback) callback(err, res);
-             that.userChangesets(function () {}); // eagerly load user details/changesets
+           if (pending === 0) {
+             done();
            }
 
-           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 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();
+           return;
          }
-       };
 
-       var _apibase = 'https://wiki.openstreetmap.org/w/api.php';
-       var _inflight$1 = {};
-       var _wikibaseCache = {};
-       var _localeIDs = {
-         en: false
-       };
+         try {
+           var _tokens = Lexer.lex(src, opt);
 
-       var debouncedRequest = debounce(request, 500, {
-         leading: false
-       });
+           if (opt.walkTokens) {
+             marked.walkTokens(_tokens, opt.walkTokens);
+           }
 
-       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);
-         });
-       }
+           return Parser.parse(_tokens, opt);
+         } catch (e) {
+           e.message += '\nPlease report this to https://github.com/markedjs/marked.';
 
-       var serviceOsmWikibase = {
-         init: function init() {
-           _inflight$1 = {};
-           _wikibaseCache = {};
-           _localeIDs = {};
-         },
-         reset: function reset() {
-           Object.values(_inflight$1).forEach(function (controller) {
-             controller.abort();
-           });
-           _inflight$1 = {};
-         },
+           if (opt.silent) {
+             return '<p>An error occurred:</p><pre>' + escape$1(e.message + '', true) + '</pre>';
+           }
 
-         /**
-          * 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;
-             }
+           throw e;
+         }
+       }
+       /**
+        * Options
+        */
 
-             if (locale && stmt.qualifiers && stmt.qualifiers.P26 && stmt.qualifiers.P26[0].datavalue.value.id === locale) {
-               localePick = stmt;
-             }
-           });
-           var result = localePick || preferredPick;
 
-           if (result) {
-             var datavalue = result.mainsnak.datavalue;
-             return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
-           } else {
-             return undefined;
-           }
-         },
+       marked.options = marked.setOptions = function (opt) {
+         merge(marked.defaults, opt);
+         changeDefaults(marked.defaults);
+         return marked;
+       };
 
-         /**
-          * 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;
+       marked.getDefaults = getDefaults;
+       marked.defaults = defaults;
+       /**
+        * Use Extension
+        */
 
-           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);
-               }
-             });
-           }
+       marked.use = function (extension) {
+         var opts = merge({}, extension);
 
-           if (rtypeSitelink) {
-             if (_wikibaseCache[rtypeSitelink]) {
-               result.rtype = _wikibaseCache[rtypeSitelink];
-             } else {
-               titles.push(rtypeSitelink);
-             }
-           }
+         if (extension.renderer) {
+           (function () {
+             var renderer = marked.defaults.renderer || new Renderer();
 
-           if (keySitelink) {
-             if (_wikibaseCache[keySitelink]) {
-               result.key = _wikibaseCache[keySitelink];
-             } else {
-               titles.push(keySitelink);
-             }
-           }
+             var _loop = function _loop(prop) {
+               var prevRenderer = renderer[prop];
 
-           if (tagSitelink) {
-             if (_wikibaseCache[tagSitelink]) {
-               result.tag = _wikibaseCache[tagSitelink];
-             } else {
-               titles.push(tagSitelink);
-             }
-           }
+               renderer[prop] = function () {
+                 for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
+                   args[_key] = arguments[_key];
+                 }
 
-           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 ret = extension.renderer[prop].apply(renderer, args);
 
+                 if (ret === false) {
+                   ret = prevRenderer.apply(renderer, args);
+                 }
 
-           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,
+                 return ret;
+               };
+             };
 
-           };
-           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;
+             for (var prop in extension.renderer) {
+               _loop(prop);
+             }
 
-                   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
-                   }
+             opts.renderer = renderer;
+           })();
+         }
+
+         if (extension.tokenizer) {
+           (function () {
+             var tokenizer = marked.defaults.tokenizer || new Tokenizer();
+
+             var _loop2 = function _loop2(prop) {
+               var prevTokenizer = tokenizer[prop];
+
+               tokenizer[prop] = function () {
+                 for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
+                   args[_key2] = arguments[_key2];
                  }
-               });
 
-               if (localeSitelink) {
-                 // If locale ID is not found, store false to prevent repeated queries
-                 that.addLocale(params.langCodes[0], localeID);
-               }
+                 var ret = extension.tokenizer[prop].apply(tokenizer, args);
 
-               callback(null, result);
-             }
-           });
-         },
-         //
-         // 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;
-             }
+                 if (ret === false) {
+                   ret = prevTokenizer.apply(tokenizer, args);
+                 }
 
-             var entity = data.rtype || data.tag || data.key;
+                 return ret;
+               };
+             };
 
-             if (!entity) {
-               callback('No entity');
-               return;
+             for (var prop in extension.tokenizer) {
+               _loop2(prop);
              }
 
-             var i;
-             var description;
+             opts.tokenizer = tokenizer;
+           })();
+         }
 
-             for (i in langCodes) {
-               var _code = langCodes[i];
+         if (extension.walkTokens) {
+           var walkTokens = marked.defaults.walkTokens;
 
-               if (entity.descriptions[_code] && entity.descriptions[_code].language === _code) {
-                 description = entity.descriptions[_code];
-                 break;
-               }
+           opts.walkTokens = function (token) {
+             extension.walkTokens(token);
+
+             if (walkTokens) {
+               walkTokens(token);
              }
+           };
+         }
 
-             if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
+         marked.setOptions(opts);
+       };
+       /**
+        * Run callback for every token
+        */
 
-             var result = {
-               title: entity.title,
-               description: description ? description.value : '',
-               descriptionLocaleCode: description ? description.language : '',
-               editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
-             }; // add image
 
-             if (entity.claims) {
-               var imageroot;
-               var image = that.claimToValue(entity, 'P4', langCodes[0]);
+       marked.walkTokens = function (tokens, callback) {
+         var _iterator = _createForOfIteratorHelper(tokens),
+             _step;
 
-               if (image) {
-                 imageroot = 'https://commons.wikimedia.org/w/index.php';
-               } else {
-                 image = that.claimToValue(entity, 'P28', langCodes[0]);
+         try {
+           for (_iterator.s(); !(_step = _iterator.n()).done;) {
+             var token = _step.value;
+             callback(token);
 
-                 if (image) {
-                   imageroot = 'https://wiki.openstreetmap.org/w/index.php';
-                 }
-               }
+             switch (token.type) {
+               case 'table':
+                 {
+                   var _iterator2 = _createForOfIteratorHelper(token.tokens.header),
+                       _step2;
 
-               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.
+                   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 _iterator3 = _createForOfIteratorHelper(token.tokens.cells),
+                       _step3;
 
-             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];
+                   try {
+                     for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
+                       var row = _step3.value;
 
-             for (i in wikis) {
-               var wiki = wikis[i];
+                       var _iterator4 = _createForOfIteratorHelper(row),
+                           _step4;
 
-               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);
+                       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 (info) {
-                   result.wiki = info;
                    break;
                  }
-               }
 
-               if (result.wiki) break;
-             }
-
-             callback(null, result); // Helper method to get wiki info if a given language exists
+               case 'list':
+                 {
+                   marked.walkTokens(token.items, callback);
+                   break;
+                 }
 
-             function getWikiInfo(wiki, langCode, tKey) {
-               if (wiki && wiki[langCode]) {
-                 return {
-                   title: wiki[langCode],
-                   text: tKey,
-                   url: 'https://wiki.openstreetmap.org/wiki/' + wiki[langCode]
-                 };
-               }
+               default:
+                 {
+                   if (token.tokens) {
+                     marked.walkTokens(token.tokens, callback);
+                   }
+                 }
              }
-           });
-         },
-         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;
+           }
+         } catch (err) {
+           _iterator.e(err);
+         } finally {
+           _iterator.f();
          }
        };
+       /**
+        * Parse Inline
+        */
 
-       var jsonpCache = {};
-       window.jsonpCache = jsonpCache;
-       function jsonpRequest(url, callback) {
-         var request = {
-           abort: function abort() {}
-         };
-
-         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);
-             };
-           }
+       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');
+         }
 
-           return request;
+         if (typeof src !== 'string') {
+           throw new Error('marked.parseInline(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
          }
 
-         function rand() {
-           var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
-           var c = '';
-           var i = -1;
+         opt = merge({}, marked.defaults, opt || {});
+         checkSanitizeDeprecation(opt);
 
-           while (++i < 15) {
-             c += chars.charAt(Math.floor(Math.random() * 52));
+         try {
+           var tokens = Lexer.lexInline(src, opt);
+
+           if (opt.walkTokens) {
+             marked.walkTokens(tokens, opt.walkTokens);
            }
 
-           return c;
+           return Parser.parseInline(tokens, opt);
+         } catch (e) {
+           e.message += '\nPlease report this to https://github.com/markedjs/marked.';
+
+           if (opt.silent) {
+             return '<p>An error occurred:</p><pre>' + escape$1(e.message + '', true) + '</pre>';
+           }
+
+           throw e;
          }
+       };
+       /**
+        * Expose
+        */
 
-         function create(url) {
-           var e = url.match(/callback=(\w+)/);
-           var c = e ? e[1] : rand();
 
-           jsonpCache[c] = function (data) {
-             if (jsonpCache[c]) {
-               callback(data);
-             }
+       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;
 
-             finalize();
-           };
+       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
 
-           function finalize() {
-             delete jsonpCache[c];
-             script.remove();
+       var _cache;
+
+       function abortRequest$4(controller) {
+         if (controller) {
+           controller.abort();
+         }
+       }
+
+       function abortUnwantedRequests$1(cache, tiles) {
+         Object.keys(cache.inflightTile).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
+             return k === tile.id;
+           });
+
+           if (!wanted) {
+             abortRequest$4(cache.inflightTile[k]);
+             delete cache.inflightTile[k];
            }
+         });
+       }
 
-           request.abort = finalize;
-           return 'jsonpCache.' + c;
+       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 updateRtree$1(item, replace) {
+         _cache.rtree.remove(item, function (a, b) {
+           return a.data.id === b.data.id;
+         });
+
+         if (replace) {
+           _cache.rtree.insert(item);
          }
+       } // Issues shouldn't obscure each other
 
-         var cb = create(url);
-         var script = select('head').append('script').attr('type', 'text/javascript').attr('src', url.replace(/(\{|%7B)callback(\}|%7D)/, cb));
-         return request;
+
+       function preventCoincident(loc) {
+         var coincident = false;
+
+         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);
+
+         return loc;
        }
 
-       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 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]);
+             }, []);
+           });
 
-       var maxHfov = 90; // zoom out degrees
+           if (!_cache) {
+             this.reset();
+           }
 
-       var defaultHfov = 45;
-       var _hires = false;
-       var _resolution = 512; // higher numbers are slower - 512, 1024, 2048, 4096
+           this.event = utilRebind(this, dispatch$5, 'on');
+         },
+         reset: function reset() {
+           var _strings = {};
+           var _colors = {};
 
-       var _currScene = 0;
+           if (_cache) {
+             Object.values(_cache.inflightTile).forEach(abortRequest$4); // Strings and colors are static and should not be re-populated
 
-       var _ssCache;
+             _strings = _cache.strings;
+             _colors = _cache.colors;
+           }
 
-       var _pannellumViewer;
+           _cache = {
+             data: {},
+             loadedTile: {},
+             inflightTile: {},
+             inflightPost: {},
+             closed: {},
+             rtree: new RBush(),
+             strings: _strings,
+             colors: _colors
+           };
+         },
+         loadIssues: function loadIssues(projection) {
+           var _this = this;
 
-       var _sceneOptions = {
-         showFullscreenCtrl: false,
-         autoLoad: true,
-         compass: true,
-         yaw: 0,
-         minHfov: minHfov,
-         maxHfov: maxHfov,
-         hfov: defaultHfov,
-         type: 'cubemap',
-         cubeMap: []
-       };
+           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
 
-       var _loadViewerPromise$2;
-       /**
-        * abortRequest().
-        */
+           var tiles = tiler$4.zoomExtent([_tileZoom$1, _tileZoom$1]).getTiles(projection); // abort inflight requests that are no longer needed
 
+           abortUnwantedRequests$1(_cache, tiles); // issue new requests..
 
-       function abortRequest$6(i) {
-         i.abort();
-       }
-       /**
-        * localeTimeStamp().
-        */
+           tiles.forEach(function (tile) {
+             if (_cache.loadedTile[tile.id] || _cache.inflightTile[tile.id]) return;
 
+             var _tile$xyz = _slicedToArray(tile.xyz, 3),
+                 x = _tile$xyz[0],
+                 y = _tile$xyz[1],
+                 z = _tile$xyz[2];
 
-       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, "/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 (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 loadTiles$2(which, url, projection, margin) {
-         var tiles = tiler$6.margin(margin).getTiles(projection); // abort inflight requests that are no longer needed
+                   var itemType = "".concat(item, "-").concat(cl); // Filter out unsupported issue types (some are too specific or advanced)
 
-         var cache = _ssCache[which];
-         Object.keys(cache.inflight).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k.indexOf(tile.id + ',') === 0;
+                   if (itemType in _osmoseData.icons) {
+                     var loc = issue.geometry.coordinates; // lon, lat
+
+                     loc = preventCoincident(loc);
+                     var d = new QAItem(loc, _this, itemType, id, {
+                       item: item
+                     }); // Setting elems here prevents UI detail requests
+
+                     if (item === 8300 || item === 8360) {
+                       d.elems = [];
+                     }
+
+                     _cache.data[d.id] = d;
+
+                     _cache.rtree.insert(encodeIssueRtree(d));
+                   }
+                 });
+               }
+
+               dispatch$5.call('loaded');
+             })["catch"](function () {
+               delete _cache.inflightTile[tile.id];
+               _cache.loadedTile[tile.id] = true;
+             });
            });
+         },
+         loadIssueDetail: function loadIssueDetail(issue) {
+           var _this2 = this;
 
-           if (!wanted) {
-             abortRequest$6(cache.inflight[k]);
-             delete cache.inflight[k];
+           // Issue details only need to be fetched once
+           if (issue.elems !== undefined) {
+             return Promise.resolve(issue);
            }
-         });
-         tiles.forEach(function (tile) {
-           return loadNextTilePage$2(which, url, tile);
-         });
-       }
-       /**
-        * loadNextTilePage() load data for the next tile page in line.
-        */
 
+           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);
+
+           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
 
-       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
 
-           bubbles.shift();
-           var features = bubbles.map(function (bubble) {
-             if (cache.points[bubble.id]) return null; // skip duplicates
+           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
 
-             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 allRequests = items.map(function (itemType) {
+             // No need to request data we already have
+             if (itemType in _cache.strings[locale]) return null;
 
-             return {
-               minX: loc[0],
-               minY: loc[1],
-               maxX: loc[0],
-               maxY: loc[1],
-               data: d
-             };
-           }).filter(Boolean);
-           cache.rtree.load(features);
-           connectSequences();
+             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$categories$;
 
-           if (which === 'bubbles') {
-             dispatch$7.call('loadedImages');
-           }
-         });
-       } // call this sometimes to connect the bubbles into sequences
+               var _cat$items = _slicedToArray(cat.items, 1),
+                   _cat$items$ = _cat$items[0],
+                   item = _cat$items$ === void 0 ? {
+                 "class": []
+               } : _cat$items$;
 
+               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 connectSequences() {
-         var cache = _ssCache.bubbles;
-         var keepLeaders = [];
 
-         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 (!cl) {
+                 /* eslint-disable no-console */
+                 console.log("Osmose strings request (".concat(itemType, ") had unexpected data"));
+                 /* eslint-enable no-console */
 
-           var sequence = {
-             key: bubble.key,
-             bubbles: []
-           };
-           var complete = false;
+                 return;
+               } // Cache served item colors to automatically style issue markers later
 
-           do {
-             sequence.bubbles.push(bubble);
-             seen[bubble.key] = true;
 
-             if (bubble.ne === undefined) {
-               complete = true;
-             } else {
-               bubble = cache.points[bubble.ne]; // advance to next
-             }
-           } while (bubble && !seen[bubble.key] && !complete);
+               var itemInt = item.item,
+                   color = item.color;
 
-           if (complete) {
-             _ssCache.sequences[sequence.key] = sequence; // assign bubbles to the sequence
+               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
 
-             for (var j = 0; j < sequence.bubbles.length; j++) {
-               sequence.bubbles[j].sequenceKey = sequence.key;
-             } // create a GeoJSON LineString
 
+               var title = cl.title,
+                   detail = cl.detail,
+                   fix = cl.fix,
+                   trap = cl.trap; // Osmose titles shouldn't contain markdown
 
-             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;
-               })
+               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;
              };
-           } else {
-             keepLeaders.push(cache.leaders[i]);
-           }
-         } // couldn't complete these, save for later
+
+             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
 
 
-         cache.leaders = keepLeaders;
-       }
-       /**
-        * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
-        */
+             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;
 
+           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 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
 
+           var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "/").concat(issue.newStatus);
+           var controller = new AbortController();
 
-       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 after = function after() {
+             delete _cache.inflightPost[issue.id];
 
-         var tiler = utilTiler().zoomExtent([z2, z2]);
-         return tiler.getTiles(projection).map(function (tile) {
-           return tile.extent;
-         });
-       } // no more than `limit` results per partition.
+             _this3.removeItem(issue);
 
+             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;
+               }
 
-       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) {
+               _cache.closed[issue.item] += 1;
+             }
+
+             if (callback) callback(null, issue);
+           };
+
+           _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;
            });
-           return found.length ? result.concat(found) : result;
-         }, []);
-       }
-       /**
-        * loadImage()
-        */
+         },
+         // 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
 
+           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);
+         }
+       };
 
-       function loadImage(imgInfo) {
-         return new Promise(function (resolve) {
-           var img = new Image();
+       var ieee754$1 = {};
 
-           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'
-             });
-           };
+       /*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */
 
-           img.onerror = function () {
-             resolve({
-               data: imgInfo,
-               status: 'error'
-             });
-           };
+       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;
 
-           img.setAttribute('crossorigin', '');
-           img.src = imgInfo.url;
-         });
-       }
-       /**
-        * loadCanvas()
-        */
+         for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
+         m = e & (1 << -nBits) - 1;
+         e >>= -nBits;
+         nBits += mLen;
 
-       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()
-        */
+         for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
+         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 loadFaces(faceGroup) {
-         return Promise.all(faceGroup.map(loadCanvas)).then(function () {
-           return {
-             status: 'loadFaces done'
-           };
-         });
-       }
+         return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
+       };
 
-       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
+       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 (isNaN(value) || value === Infinity) {
+           m = isNaN(value) ? 1 : 0;
+           e = eMax;
+         } else {
+           e = Math.floor(Math.log(value) / Math.LN2);
 
-         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);
-       }
+           if (value * (c = Math.pow(2, -e)) < 1) {
+             e--;
+             c *= 2;
+           }
 
-       function qkToXY(qk) {
-         var x = 0;
-         var y = 0;
-         var scale = 256;
+           if (e + eBias >= 1) {
+             value += rt / c;
+           } else {
+             value += rt * Math.pow(2, 1 - eBias);
+           }
 
-         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;
+           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;
+           }
          }
 
-         return [x, y];
-       }
+         for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
 
-       function getQuadKeys() {
-         var dim = _resolution / 256;
-         var quadKeys;
+         e = e << mLen | m;
+         eLen += mLen;
 
-         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'];
-         }
+         for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
 
-         return quadKeys;
+         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;
        }
 
-       var serviceStreetside = {
-         /**
-          * init() initialize streetside.
-          */
-         init: function init() {
-           if (!_ssCache) {
-             this.reset();
-           }
+       Pbf.Varint = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum
 
-           this.event = utilRebind(this, dispatch$7, 'on');
+       Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64
+
+       Pbf.Bytes = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields
+
+       Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32
+
+       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;
 
-         /**
-          * reset() reset the cache.
-          */
-         reset: function reset() {
-           if (_ssCache) {
-             Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$6);
+           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);
            }
 
-           _ssCache = {
-             bubbles: {
-               inflight: {},
-               loaded: {},
-               nextPage: {},
-               rtree: new RBush(),
-               points: {},
-               leaders: []
-             },
-             sequences: {}
-           };
+           return result;
          },
-
-         /**
-          * bubbles()
-          */
-         bubbles: function bubbles(projection) {
-           var limit = 5;
-           return searchLimited$2(limit, projection, _ssCache.bubbles.rtree);
+         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);
          },
-         cachedImage: function cachedImage(imageKey) {
-           return _ssCache.bubbles.points[imageKey];
+         readSVarint: function readSVarint() {
+           var num = this.readVarint();
+           return num % 2 === 1 ? (num + 1) / -2 : num / 2; // zigzag encoding
          },
-         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;
+         readBoolean: function readBoolean() {
+           return Boolean(this.readVarint());
+         },
+         readString: function readString() {
+           var end = this.readVarint() + this.pos;
+           var pos = this.pos;
+           this.pos = end;
 
-             if (key && !seen[key]) {
-               seen[key] = true;
-               results.push(_ssCache.sequences[key].geojson);
-             }
-           });
+           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
 
-           return results;
-         },
 
-         /**
-          * 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);
+           return readUtf8(this.buf, pos, end);
          },
-         viewer: function viewer() {
-           return _pannellumViewer;
+         readBytes: function readBytes() {
+           var end = this.readVarint() + this.pos,
+               buffer = this.buf.subarray(this.pos, end);
+           this.pos = end;
+           return buffer;
          },
-         initViewer: function initViewer() {
-           if (!window.pannellum) return;
-           if (_pannellumViewer) return;
-           _currScene += 1;
+         // 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 || [];
 
-           var sceneID = _currScene.toString();
+           while (this.pos < end) {
+             arr.push(this.readVarint(isSigned));
+           }
 
-           var options = {
-             'default': {
-               firstScene: sceneID
-             },
-             scenes: {}
-           };
-           options.scenes[sceneID] = _sceneOptions;
-           _pannellumViewer = window.pannellum.viewer('ideditor-viewer-streetside', options);
+           return arr;
          },
-         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');
+         readPackedSVarint: function readPackedSVarint(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readSVarint());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-               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
+           while (this.pos < end) {
+             arr.push(this.readSVarint());
+           }
 
-           wrap = wrap.merge(wrapEnter).call(setupCanvas, true); // Register viewer resize handler
+           return arr;
+         },
+         readPackedBoolean: function readPackedBoolean(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readBoolean());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-           context.ui().photoviewer.on('resize.streetside', function () {
-             if (_pannellumViewer) {
-               _pannellumViewer.resize();
-             }
-           });
-           _loadViewerPromise$2 = new Promise(function (resolve, reject) {
-             var loadedCount = 0;
+           while (this.pos < end) {
+             arr.push(this.readBoolean());
+           }
 
-             function loaded() {
-               loadedCount += 1; // wait until both files are loaded
+           return arr;
+         },
+         readPackedFloat: function readPackedFloat(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readFloat());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-               if (loadedCount === 2) resolve();
-             }
+           while (this.pos < end) {
+             arr.push(this.readFloat());
+           }
 
-             var head = select('head'); // load streetside pannellum viewer css
+           return arr;
+         },
+         readPackedDouble: function readPackedDouble(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readDouble());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-             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
+           while (this.pos < end) {
+             arr.push(this.readDouble());
+           }
 
-             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;
+           return arr;
+         },
+         readPackedFixed32: function readPackedFixed32(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readFixed32());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-           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;
+           while (this.pos < end) {
+             arr.push(this.readFixed32());
+           }
 
-               var yaw = _pannellumViewer.getYaw();
+           return arr;
+         },
+         readPackedSFixed32: function readPackedSFixed32(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed32());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-               var ca = selected.ca + yaw;
-               var origin = selected.loc; // construct a search trapezoid pointing out from current bubble
+           while (this.pos < end) {
+             arr.push(this.readSFixed32());
+           }
 
-               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
+           return arr;
+         },
+         readPackedFixed64: function readPackedFixed64(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readFixed64());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-               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
+           while (this.pos < end) {
+             arr.push(this.readFixed64());
+           }
 
-               var minDist = Infinity;
+           return arr;
+         },
+         readPackedSFixed64: function readPackedSFixed64(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed64());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-               _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));
+           while (this.pos < end) {
+             arr.push(this.readSFixed64());
+           }
 
-                 if (minTheta > 20) {
-                   dist += 5; // penalize distance if camera angles don't match
-                 }
+           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;
 
-                 if (dist < minDist) {
-                   nextID = d.data.key;
-                   minDist = dist;
-                 }
-               });
+           while (length < this.pos + min) {
+             length *= 2;
+           }
 
-               var nextBubble = nextID && that.cachedImage(nextID);
-               if (!nextBubble) return;
-               context.map().centerEase(nextBubble.loc);
-               that.selectImage(context, nextBubble.key).yaw(yaw).showViewer(context);
-             };
+           if (length !== this.length) {
+             var buf = new Uint8Array(length);
+             buf.set(this.buf);
+             this.buf = buf;
+             this.length = length;
            }
          },
-         yaw: function yaw(_yaw) {
-           if (typeof _yaw !== 'number') return _yaw;
-           _sceneOptions.yaw = _yaw;
-           return this;
+         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;
 
-         /**
-          * 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 (isHidden) {
-             wrap.selectAll('.photo-wrapper:not(.ms-wrapper)').classed('hide', true);
-             wrap.selectAll('.photo-wrapper.ms-wrapper').classed('hide', false);
+           if (val > 0xfffffff || val < 0) {
+             writeBigVarint(val, this);
+             return;
            }
 
-           return this;
+           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;
          },
-
-         /**
-          * 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);
+         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
 
-         /**
-          * 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
-
-           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
-
-           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('|');
-           }
-
-           if (d.captured_at) {
-             captureInfo.append('span').attr('class', 'captured_at').html(localeTimestamp(d.captured_at));
-           } // Add image links
+           var startPos = this.pos; // write the string directly to the buffer and see how much was written
 
+           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 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;
+           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);
 
-           for (var i = 0; i < paddingNeeded; i++) {
-             bubbleIdQuadKey = '0' + bubbleIdQuadKey;
+           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
 
-           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
-
-           var faceKeys = ['01', '02', '03', '10', '11', '12']; // Map images to cube faces
-
-           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;
-
-               var sceneID = _currScene.toString();
-
-               _pannellumViewer.addScene(sceneID, _sceneOptions).loadScene(sceneID); // remove previous scene
-
-
-               if (_currScene > 2) {
-                 sceneID = (_currScene - 1).toString();
+           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
 
-                 _pannellumViewer.removeScene(sceneID);
-               }
-             }
-           });
-           return this;
+           this.pos = startPos - 1;
+           this.writeVarint(len);
+           this.pos += len;
          },
-         getSequenceKeyForBubble: function getSequenceKeyForBubble(d) {
-           return d && d.sequenceKey;
+         writeMessage: function writeMessage(tag, fn, obj) {
+           this.writeTag(tag, Pbf.Bytes);
+           this.writeRawMessage(fn, obj);
          },
-         // 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
+         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 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
+       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');
+       }
 
-           context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
+       function readPackedEnd(pbf) {
+         return pbf.type === Pbf.Bytes ? pbf.readVarint() + pbf.pos : pbf.pos + 1;
+       }
 
-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
+       function toNum(low, high, isSigned) {
+         if (isSigned) {
+           return high * 0x100000000 + (low >>> 0);
+         }
 
-             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';
-             }
-           }
+         return (high >>> 0) * 0x100000000 + (low >>> 0);
+       }
 
-           return this;
-         },
-         updateUrlImage: function updateUrlImage(imageKey) {
-           if (!window.mocha) {
-             var hash = utilStringQs(window.location.hash);
+       function writeBigVarint(val, pbf) {
+         var low, high;
 
-             if (imageKey) {
-               hash.photo = 'streetside/' + imageKey;
-             } else {
-               delete hash.photo;
-             }
+         if (val >= 0) {
+           low = val % 0x100000000 | 0;
+           high = val / 0x100000000 | 0;
+         } else {
+           low = ~(-val % 0x100000000);
+           high = ~(-val / 0x100000000);
 
-             window.location.replace('#' + utilQsString(hash, true));
+           if (low ^ 0xffffffff) {
+             low = low + 1 | 0;
+           } else {
+             low = 0;
+             high = high + 1 | 0;
            }
-         },
-
-         /**
-          * cache().
-          */
-         cache: function cache() {
-           return _ssCache;
          }
-       };
-
-       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'
-       };
 
-       function sets(params, n, o) {
-         if (params.geometry && o[params.geometry]) {
-           params[n] = o[params.geometry];
+         if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
+           throw new Error('Given varint doesn\'t fit into 10 bytes');
          }
 
-         return params;
+         pbf.realloc(10);
+         writeBigVarintLow(low, high, pbf);
+         writeBigVarintHigh(high, pbf);
        }
 
-       function setFilter(params) {
-         return sets(params, 'filter', tag_filters);
+       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;
        }
 
-       function setSort(params) {
-         return sets(params, 'sortname', tag_sorts);
+       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 setSortMembers(params) {
-         return sets(params, 'sortname', tag_sort_members);
-       }
+       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 clean(params) {
-         return utilObjectOmit(params, ['geometry', 'debounce']);
-       }
+         pbf.realloc(extraLen);
 
-       function filterKeys(type) {
-         var count_type = type ? 'count_' + type : 'count_all';
-         return function (d) {
-           return parseFloat(d[count_type]) > 2500 || d.in_wiki;
-         };
+         for (var i = pbf.pos - 1; i >= startPos; i--) {
+           pbf.buf[i + extraLen] = pbf.buf[i];
+         }
        }
 
-       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;
-         };
+       function _writePackedVarint(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeVarint(arr[i]);
+         }
        }
 
-       function filterValues(allowUpperCase) {
-         return function (d) {
-           if (d.value.match(/[;,]/) !== null) return false; // exclude some punctuation
-
-           if (!allowUpperCase && d.value.match(/[A-Z*]/) !== null) return false; // exclude uppercase letters
-
-           return parseFloat(d.fraction) > 0.0;
-         };
+       function _writePackedSVarint(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeSVarint(arr[i]);
+         }
        }
 
-       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
+       function _writePackedFloat(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeFloat(arr[i]);
+         }
+       }
 
-           return parseFloat(d[tag_members_fractions[geometry]]) > 0.0;
-         };
+       function _writePackedDouble(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeDouble(arr[i]);
+         }
        }
 
-       function valKey(d) {
-         return {
-           value: d.key,
-           title: d.key
-         };
+       function _writePackedBoolean(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeBoolean(arr[i]);
+         }
        }
 
-       function valKeyDescription(d) {
-         var obj = {
-           value: d.value,
-           title: d.description || d.value
-         };
+       function _writePackedFixed(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeFixed32(arr[i]);
+         }
+       }
 
-         if (d.count) {
-           obj.count = d.count;
+       function _writePackedSFixed(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeSFixed32(arr[i]);
          }
+       }
 
-         return obj;
+       function _writePackedFixed2(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeFixed64(arr[i]);
+         }
        }
 
-       function roleKey(d) {
-         return {
-           value: d.role,
-           title: d.role
-         };
-       } // sort keys with ':' lower than keys without ':'
+       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
 
 
-       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 readUInt32(buf, pos) {
+         return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + buf[pos + 3] * 0x1000000;
        }
 
-       var debouncedRequest$1 = debounce(request$1, 300, {
-         leading: false
-       });
+       function writeInt32(buf, val, pos) {
+         buf[pos] = val;
+         buf[pos + 1] = val >>> 8;
+         buf[pos + 2] = val >>> 16;
+         buf[pos + 3] = val >>> 24;
+       }
 
-       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);
-         });
+       function readInt32(buf, pos) {
+         return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + (buf[pos + 3] << 24);
        }
 
-       function checkCache(url, params, exactMatch, callback) {
-         var rp = params.rp || 25;
-         var testQuery = params.query || '';
-         var testUrl = url;
+       function readUtf8(buf, pos, end) {
+         var str = '';
+         var i = pos;
 
-         do {
-           var hit = _taginfoCache[testUrl]; // exact match, or shorter match yielding fewer than max results (rp)
+         while (i < end) {
+           var b0 = buf[i];
+           var c = null; // codepoint
 
-           if (hit && (url === testUrl || hit.length < rp)) {
-             callback(null, hit);
-             return true;
-           } // don't try to shorten the query
+           var bytesPerSequence = b0 > 0xEF ? 4 : b0 > 0xDF ? 3 : b0 > 0xBF ? 2 : 1;
+           if (i + bytesPerSequence > end) break;
+           var b1, b2, b3;
 
+           if (bytesPerSequence === 1) {
+             if (b0 < 0x80) {
+               c = b0;
+             }
+           } else if (bytesPerSequence === 2) {
+             b1 = buf[i + 1];
 
-           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)
+             if ((b1 & 0xC0) === 0x80) {
+               c = (b0 & 0x1F) << 0x6 | b1 & 0x3F;
 
-           testQuery = testQuery.slice(0, -1);
-           testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
-         } while (testQuery.length >= 0);
+               if (c <= 0x7F) {
+                 c = null;
+               }
+             }
+           } else if (bytesPerSequence === 3) {
+             b1 = buf[i + 1];
+             b2 = buf[i + 2];
 
-         return false;
-       }
+             if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {
+               c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | b2 & 0x3F;
 
-       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
+               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];
 
-           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
+             if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
+               c = (b0 & 0xF) << 0x12 | (b1 & 0x3F) << 0xC | (b2 & 0x3F) << 0x6 | b3 & 0x3F;
 
-               _popularKeys[d.value] = true;
-             });
-           });
-         },
-         reset: function reset() {
-           Object.values(_inflight$2).forEach(function (controller) {
-             controller.abort();
-           });
-           _inflight$2 = {};
-         },
-         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);
-             }
-           });
-         },
-         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);
+               if (c <= 0xFFFF || c >= 0x110000) {
+                 c = null;
+               }
              }
-           });
-         },
-         values: function values(params, callback) {
-           // Exclude popular keys from values lookups.. see #3955
-           var key = params.key;
+           }
 
-           if (key && _popularKeys[key]) {
-             callback(null, []);
-             return;
+           if (c === null) {
+             c = 0xFFFD;
+             bytesPerSequence = 1;
+           } else if (c > 0xFFFF) {
+             c -= 0x10000;
+             str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
+             c = 0xDC00 | c & 0x3FF;
            }
 
-           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);
-             }
-           });
-         },
-         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);
+           str += String.fromCharCode(c);
+           i += bytesPerSequence;
+         }
+
+         return str;
+       }
+
+       function readUtf8TextDecoder(buf, pos, end) {
+         return utf8TextDecoder.decode(buf.subarray(pos, end));
+       }
+
+       function writeUtf8(buf, str, pos) {
+         for (var i = 0, c, lead; i < str.length; i++) {
+           c = str.charCodeAt(i); // code point
+
+           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 {
-               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$1 : request$1;
-           params = clean(setSort(params));
-           var path = 'key/wiki_pages?';
+               if (c > 0xDBFF || i + 1 === str.length) {
+                 buf[pos++] = 0xEF;
+                 buf[pos++] = 0xBF;
+                 buf[pos++] = 0xBD;
+               } else {
+                 lead = c;
+               }
 
-           if (params.value) {
-             path = 'tag/wiki_pages?';
-           } else if (params.rtype) {
-             path = 'relation/wiki_pages?';
+               continue;
+             }
+           } else if (lead) {
+             buf[pos++] = 0xEF;
+             buf[pos++] = 0xBF;
+             buf[pos++] = 0xBD;
+             lead = null;
            }
 
-           var url = _apibase$1 + path + utilQsString(params);
-           doRequest(url, params, true, callback, function (err, d) {
-             if (err) {
-               callback(err);
+           if (c < 0x80) {
+             buf[pos++] = c;
+           } else {
+             if (c < 0x800) {
+               buf[pos++] = c >> 0x6 | 0xC0;
              } else {
-               _taginfoCache[url] = d.data;
-               callback(null, d.data);
+               if (c < 0x10000) {
+                 buf[pos++] = c >> 0xC | 0xE0;
+               } else {
+                 buf[pos++] = c >> 0x12 | 0xF0;
+                 buf[pos++] = c >> 0xC & 0x3F | 0x80;
+               }
+
+               buf[pos++] = c >> 0x6 & 0x3F | 0x80;
              }
-           });
-         },
-         apibase: function apibase(_) {
-           if (!arguments.length) return _apibase$1;
-           _apibase$1 = _;
-           return this;
+
+             buf[pos++] = c & 0x3F | 0x80;
+           }
          }
-       };
 
+         return pos;
+       }
+
+       var vectorTile = {};
+
+       var pointGeometry = Point$1;
        /**
-        * Wraps a GeoJSON {@link Geometry} in a GeoJSON {@link Feature}.
+        * A standalone point geometry with useful accessor, comparison, and
+        * modification methods.
         *
-        * @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
+        * @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 geometry = {
-        *   "type": "Point",
-        *   "coordinates": [110, 50]
-        * };
-        *
-        * var feature = turf.feature(geometry);
-        *
-        * //=feature
+        * var point = new Point(-77, 38);
         */
 
-       function feature(geom, properties, options) {
-         if (options === void 0) {
-           options = {};
-         }
+       function Point$1(x, y) {
+         this.x = x;
+         this.y = y;
+       }
 
-         var feat = {
-           type: "Feature"
-         };
+       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);
+         },
 
-         if (options.id === 0 || options.id) {
-           feat.id = options.id;
-         }
+         /**
+          * 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);
+         },
 
-         if (options.bbox) {
-           feat.bbox = options.bbox;
-         }
+         /**
+          * 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);
+         },
 
-         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
-        */
+         /**
+          * 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);
+         },
 
-       function polygon(coordinates, properties, options) {
-         if (options === void 0) {
-           options = {};
-         }
+         /**
+          * 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 (var _i = 0, coordinates_1 = coordinates; _i < coordinates_1.length; _i++) {
-           var ring = coordinates_1[_i];
+         /**
+          * 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);
+         },
 
-           if (ring.length < 4) {
-             throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");
-           }
+         /**
+          * 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);
+         },
 
-           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.");
-             }
-           }
-         }
+         /**
+          * 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);
+         },
 
-         var geom = {
-           type: "Polygon",
-           coordinates: coordinates
-         };
-         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
-        */
+         /**
+          * 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);
+         },
 
-       function lineString(coordinates, properties, options) {
-         if (options === void 0) {
-           options = {};
-         }
+         /**
+          * 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);
+         },
 
-         if (coordinates.length < 2) {
-           throw new Error("coordinates must be an array of two or more positions");
-         }
+         /**
+          * 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();
+         },
 
-         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
-        */
+         /**
+          * 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();
+         },
 
-       function multiLineString(coordinates, properties, options) {
-         if (options === void 0) {
-           options = {};
-         }
+         /**
+          * 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();
+         },
 
-         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
-        *
-        */
+         /**
+          * 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);
+         },
 
-       function multiPolygon(coordinates, properties, options) {
-         if (options === void 0) {
-           options = {};
-         }
+         /**
+          * 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;
+         },
 
-         var geom = {
-           type: "MultiPolygon",
-           coordinates: coordinates
-         };
-         return feature(geom, properties, options);
-       }
+         /**
+          * 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));
+         },
+
+         /**
+          * 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);
+         },
+
+         /**
+          * 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);
+         },
+
+         /**
+          * 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());
+
+           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;
+         }
+       };
        /**
-        * 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
+        * 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
-        * var point = {
-        *   "type": "Feature",
-        *   "properties": {},
-        *   "geometry": {
-        *     "type": "Point",
-        *     "coordinates": [110, 40]
-        *   }
-        * }
-        * var geom = turf.getGeom(point)
-        * //={"type": "Point", "coordinates": [110, 40]}
+        * // this
+        * var point = Point.convert([0, 1]);
+        * // is equivalent to
+        * var point = new Point(0, 1);
         */
 
-       function getGeom(geojson) {
-         if (geojson.type === "Feature") {
-           return geojson.geometry;
+       Point$1.convert = function (a) {
+         if (a instanceof Point$1) {
+           return a;
          }
 
-         return geojson;
-       }
+         if (Array.isArray(a)) {
+           return new Point$1(a[0], a[1]);
+         }
 
-       // 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 = [];
+         return a;
+       };
 
-         for (i = 1; i < len; i++) {
-           a = points[i - 1];
-           b = points[i];
-           codeB = lastCode = bitCode(b, bbox);
+       var Point = pointGeometry;
+       var vectortilefeature = VectorTileFeature$1;
 
-           while (true) {
-             if (!(codeA | codeB)) {
-               // accept
-               part.push(a);
+       function VectorTileFeature$1(pbf, end, extent, keys, values) {
+         // Public
+         this.properties = {};
+         this.extent = extent;
+         this.type = 0; // Private
 
-               if (codeB !== lastCode) {
-                 // segment went outside
-                 part.push(b);
+         this._pbf = pbf;
+         this._geometry = -1;
+         this._keys = keys;
+         this._values = values;
+         pbf.readFields(readFeature, this, end);
+       }
 
-                 if (i < len - 1) {
-                   // start a new line
-                   result.push(part);
-                   part = [];
-                 }
-               } else if (i === len - 1) {
-                 part.push(b);
-               }
+       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;
+       }
 
-               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);
-             }
-           }
+       function readTag(pbf, feature) {
+         var end = pbf.readVarint() + pbf.pos;
 
-           codeA = lastCode;
+         while (pbf.pos < end) {
+           var key = feature._keys[pbf.readVarint()],
+               value = feature._values[pbf.readVarint()];
+
+           feature.properties[key] = value;
          }
+       }
 
-         if (part.length) result.push(part);
-         return result;
-       } // Sutherland-Hodgeman polygon clipping algorithm
+       VectorTileFeature$1.types = ['Unknown', 'Point', 'LineString', 'Polygon'];
 
-       function polygonclip(points, bbox) {
-         var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
+       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;
 
-         for (edge = 1; edge <= 8; edge *= 2) {
-           result = [];
-           prev = points[points.length - 1];
-           prevInside = !(bitCode(prev, bbox) & edge);
+         while (pbf.pos < end) {
+           if (length <= 0) {
+             var cmdLen = pbf.readVarint();
+             cmd = cmdLen & 0x7;
+             length = cmdLen >> 3;
+           }
 
-           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
+           length--;
 
-             if (inside !== prevInside) result.push(intersect(prev, p, edge, bbox));
-             if (inside) result.push(p); // add a point if it's inside
+           if (cmd === 1 || cmd === 2) {
+             x += pbf.readSVarint();
+             y += pbf.readSVarint();
 
-             prev = p;
-             prevInside = inside;
-           }
+             if (cmd === 1) {
+               // moveTo
+               if (line) lines.push(line);
+               line = [];
+             }
 
-           points = result;
-           if (!points.length) break;
+             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);
+           }
          }
 
-         return result;
-       } // intersect a segment against one of the 4 lines that make up the bbox
+         if (line) lines.push(line);
+         return lines;
+       };
 
-       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
+       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;
 
+         while (pbf.pos < end) {
+           if (length <= 0) {
+             var cmdLen = pbf.readVarint();
+             cmd = cmdLen & 0x7;
+             length = cmdLen >> 3;
+           }
 
-       function bitCode(p, bbox) {
-         var code = 0;
-         if (p[0] < bbox[0]) code |= 1; // left
-         else if (p[0] > bbox[2]) code |= 2; // right
+           length--;
 
-         if (p[1] < bbox[1]) code |= 4; // bottom
-         else if (p[1] > bbox[3]) code |= 8; // top
+           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);
+           }
+         }
 
-         return code;
-       }
+         return [x1, y1, x2, y2];
+       };
 
-       /**
-        * 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]
-        */
+       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;
 
-       function bboxClip(feature, bbox) {
-         var geom = getGeom(feature);
-         var type = geom.type;
-         var properties = feature.type === "Feature" ? feature.properties : {};
-         var coords = geom.coordinates;
+         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 (type) {
-           case "LineString":
-           case "MultiLineString":
-             var lines_1 = [];
+         switch (this.type) {
+           case 1:
+             var points = [];
 
-             if (type === "LineString") {
-               coords = [coords];
+             for (i = 0; i < coords.length; i++) {
+               points[i] = coords[i][0];
              }
 
-             coords.forEach(function (line) {
-               lineclip(line, bbox, lines_1);
-             });
+             coords = points;
+             project(coords);
+             break;
 
-             if (lines_1.length === 1) {
-               return lineString(lines_1[0], properties);
+           case 2:
+             for (i = 0; i < coords.length; i++) {
+               project(coords[i]);
              }
 
-             return multiLineString(lines_1, properties);
-
-           case "Polygon":
-             return polygon(clipPolygon(coords, bbox), properties);
-
-           case "MultiPolygon":
-             return multiPolygon(coords.map(function (poly) {
-               return clipPolygon(poly, bbox);
-             }), properties);
-
-           default:
-             throw new Error("geometry " + type + " not supported");
-         }
-       }
-
-       function clipPolygon(rings, bbox) {
-         var outRings = [];
+             break;
 
-         for (var _i = 0, rings_1 = rings; _i < rings_1.length; _i++) {
-           var ring = rings_1[_i];
-           var clipped = polygonclip(ring, bbox);
+           case 3:
+             coords = classifyRings(coords);
 
-           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]);
+             for (i = 0; i < coords.length; i++) {
+               for (j = 0; j < coords[i].length; j++) {
+                 project(coords[i][j]);
+               }
              }
 
-             if (clipped.length >= 4) {
-               outRings.push(clipped);
-             }
-           }
+             break;
          }
 
-         return outRings;
-       }
+         if (coords.length === 1) {
+           coords = coords[0];
+         } else {
+           type = 'Multi' + type;
+         }
 
-       var fastJsonStableStringify = function fastJsonStableStringify(data, opts) {
-         if (!opts) opts = {};
-         if (typeof opts === 'function') opts = {
-           cmp: opts
+         var result = {
+           type: "Feature",
+           geometry: {
+             type: type,
+             coordinates: coords
+           },
+           properties: this.properties
          };
-         var cycles = typeof opts.cycles === 'boolean' ? opts.cycles : false;
 
-         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 ('id' in this) {
+           result.id = this.id;
+         }
 
-         var seen = [];
-         return function stringify(node) {
-           if (node && node.toJSON && typeof node.toJSON === 'function') {
-             node = node.toJSON();
-           }
+         return result;
+       }; // classifies an array of rings into polygons with outer rings and holes
 
-           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 (Array.isArray(node)) {
-             out = '[';
+       function classifyRings(rings) {
+         var len = rings.length;
+         if (len <= 1) return [rings];
+         var polygons = [],
+             polygon,
+             ccw;
 
-             for (i = 0; i < node.length; i++) {
-               if (i) out += ',';
-               out += stringify(node[i]) || 'null';
-             }
+         for (var i = 0; i < len; i++) {
+           var area = signedArea(rings[i]);
+           if (area === 0) continue;
+           if (ccw === undefined) ccw = area < 0;
 
-             return out + ']';
+           if (ccw === area < 0) {
+             if (polygon) polygons.push(polygon);
+             polygon = [rings[i]];
+           } else {
+             polygon.push(rings[i]);
            }
+         }
 
-           if (node === null) return 'null';
+         if (polygon) polygons.push(polygon);
+         return polygons;
+       }
 
-           if (seen.indexOf(node) !== -1) {
-             if (cycles) return JSON.stringify('__cycle__');
-             throw new TypeError('Converting circular structure to JSON');
-           }
+       function signedArea(ring) {
+         var sum = 0;
 
-           var seenIndex = seen.push(node) - 1;
-           var keys = Object.keys(node).sort(cmp && cmp(node));
-           out = '';
+         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);
+         }
 
-           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;
-           }
+         return sum;
+       }
 
-           seen.splice(seenIndex, 1);
-           return '{' + out + '}';
-         }(data);
-       };
+       var VectorTileFeature = vectortilefeature;
+       var vectortilelayer = VectorTileLayer$1;
 
-       function DEFAULT_COMPARE(a, b) {
-         return a > b ? 1 : a < b ? -1 : 0;
+       function VectorTileLayer$1(pbf, end) {
+         // Public
+         this.version = 1;
+         this.name = null;
+         this.extent = 4096;
+         this.length = 0; // Private
+
+         this._pbf = pbf;
+         this._keys = [];
+         this._values = [];
+         this._features = [];
+         pbf.readFields(readLayer, this, end);
+         this.length = this._features.length;
        }
 
-       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;
+       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));
+       }
 
-           _classCallCheck(this, SplayTree);
+       function readValueMessage(pbf) {
+         var value = null,
+             end = pbf.readVarint() + pbf.pos;
 
-           this._compare = compare;
-           this._root = null;
-           this._size = 0;
-           this._noDuplicates = !!noDuplicates;
+         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;
          }
 
-         _createClass(SplayTree, [{
-           key: "rotateLeft",
-           value: function rotateLeft(x) {
-             var y = x.right;
-
-             if (y) {
-               x.right = y.left;
-               if (y.left) y.left.parent = x;
-               y.parent = x.parent;
-             }
+         return value;
+       } // return feature `i` from this layer as a `VectorTileFeature`
 
-             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;
 
-             if (y) {
-               x.left = y.right;
-               if (y.right) y.right.parent = x;
-               y.parent = x.parent;
-             }
+       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];
 
-             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;
-               }
+         var end = this._pbf.readVarint() + this._pbf.pos;
 
-               l = x.left;
-               r = x.right;
+         return new VectorTileFeature(this._pbf, end, this.extent, this._keys, this._values);
+       };
 
-               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 VectorTileLayer = vectortilelayer;
+       var vectortile = VectorTile$1;
 
-                     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;
-                   }
-                 }
+       function VectorTile$1(pbf, end) {
+         this.layers = pbf.readFields(readTile, {}, end);
+       }
 
-                 if (r) {
-                   p.left = r;
-                   r.parent = p;
-                 } else p.left = null;
+       function readTile(tag, layers, pbf) {
+         if (tag === 3) {
+           var layer = new VectorTileLayer(pbf, pbf.readVarint() + pbf.pos);
+           if (layer.length) layers[layer.name] = layer;
+         }
+       }
 
-                 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 VectorTile = vectorTile.VectorTile = vectortile;
+       vectorTile.VectorTileFeature = vectortilefeature;
+       vectorTile.VectorTileLayer = vectortilelayer;
 
-                 if (l) {
-                   p.right = l;
-                   l.parent = p;
-                 } else p.right = null;
+       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');
 
-                 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 _loadViewerPromise$2;
 
-             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 _mlyActiveImage;
 
-             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 _mlyCache;
 
-             return null;
-           }
-           /**
-            * Whether the tree contains a node with the given key
-            * @param  {Key} key
-            * @return {boolean} true/false
-            */
+       var _mlyFallback = false;
 
-         }, {
-           key: "contains",
-           value: function contains(key) {
-             var node = this._root;
-             var comparator = this._compare;
+       var _mlyHighlightedDetection;
 
-             while (node) {
-               var cmp = comparator(key, node.key);
-               if (cmp === 0) return true;else if (cmp < 0) node = node.left;else node = node.right;
-             }
+       var _mlyShowFeatureDetections = false;
+       var _mlyShowSignDetections = false;
 
-             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);
+       var _mlyViewer;
 
-               if (y.parent !== z) {
-                 this.replace(y, y.right);
-                 y.right = z.right;
-                 y.right.parent = y;
-               }
+       var _mlyViewerFilter = ['all']; // Load all data for the specified type from Mapillary vector tiles
 
-               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);
+       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
 
-               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;
+       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);
            }
-         }, {
-           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;
-             }
 
-             if (t) {
-               if (s) sMax.right = t;else this._root = t;
-               t.parent = sMax;
-             }
-
-             this._size--;
+           cache.loaded[tileId] = true;
+           delete cache.inflight[tileId];
+           return response.arrayBuffer();
+         }).then(function (data) {
+           if (!data) {
+             throw new Error('No Data');
            }
-           /**
-            * Removes and returns the node with smallest key
-            * @return {?Node}
-            */
-
-         }, {
-           key: "pop",
-           value: function pop() {
-             var node = this._root,
-                 returnValue = null;
-
-             if (node) {
-               while (node.left) {
-                 node = node.left;
-               }
 
-               returnValue = {
-                 key: node.key,
-                 data: node.data
-               };
-               this.remove(node.key);
-             }
+           loadTileDataToCache(data, tile, which);
 
-             return returnValue;
+           if (which === 'images') {
+             dispatch$4.call('loadedImages');
+           } else if (which === 'signs') {
+             dispatch$4.call('loadedSigns');
+           } else if (which === 'points') {
+             dispatch$4.call('loadedMapFeatures');
            }
-           /* eslint-disable class-methods-use-this */
-
-           /**
-            * Successor node
-            * @param  {Node} node
-            * @return {?Node}
-            */
-
-         }, {
-           key: "next",
-           value: function next(node) {
-             var successor = node;
+         })["catch"](function () {
+           cache.loaded[tileId] = true;
+           delete cache.inflight[tileId];
+         });
+       } // Load the data from the vector tile into cache
 
-             if (successor) {
-               if (successor.right) {
-                 successor = successor.right;
 
-                 while (successor && successor.left) {
-                   successor = successor.left;
-                 }
-               } else {
-                 successor = node.parent;
+       function loadTileDataToCache(data, tile, which) {
+         var vectorTile = new VectorTile(new pbf(data));
+         var features, cache, layer, i, feature, loc, d;
 
-                 while (successor && successor.right === node) {
-                   node = successor;
-                   successor = successor.parent;
-                 }
-               }
-             }
+         if (vectorTile.layers.hasOwnProperty('image')) {
+           features = [];
+           cache = _mlyCache.images;
+           layer = vectorTile.layers.image;
 
-             return successor;
+           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
+             });
            }
-           /**
-            * Predecessor node
-            * @param  {Node} node
-            * @return {?Node}
-            */
 
-         }, {
-           key: "prev",
-           value: function prev(node) {
-             var predecessor = node;
+           if (cache.rtree) {
+             cache.rtree.load(features);
+           }
+         }
 
-             if (predecessor) {
-               if (predecessor.left) {
-                 predecessor = predecessor.left;
+         if (vectorTile.layers.hasOwnProperty('sequence')) {
+           features = [];
+           cache = _mlyCache.sequences;
+           layer = vectorTile.layers.sequence;
 
-                 while (predecessor && predecessor.right) {
-                   predecessor = predecessor.right;
-                 }
-               } else {
-                 predecessor = node.parent;
+           for (i = 0; i < layer.length; i++) {
+             feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
 
-                 while (predecessor && predecessor.left === node) {
-                   node = predecessor;
-                   predecessor = predecessor.parent;
-                 }
-               }
+             if (cache.lineString[feature.properties.id]) {
+               cache.lineString[feature.properties.id].push(feature);
+             } else {
+               cache.lineString[feature.properties.id] = [feature];
              }
-
-             return predecessor;
            }
-           /* eslint-enable class-methods-use-this */
+         }
 
-           /**
-            * @param  {forEachCallback} callback
-            * @return {SplayTree}
-            */
+         if (vectorTile.layers.hasOwnProperty('point')) {
+           features = [];
+           cache = _mlyCache[which];
+           layer = vectorTile.layers.point;
 
-         }, {
-           key: "forEach",
-           value: function forEach(callback) {
-             var current = this._root;
-             var s = [],
-                 done = false,
-                 i = 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
+             });
+           }
 
-             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 (cache.rtree) {
+             cache.rtree.load(features);
+           }
+         }
 
-                   current = current.right;
-                 } else done = true;
-               }
-             }
+         if (vectorTile.layers.hasOwnProperty('traffic_sign')) {
+           features = [];
+           cache = _mlyCache[which];
+           layer = vectorTile.layers.traffic_sign;
 
-             return this;
+           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
+             });
            }
-           /**
-            * 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}
-            */
-
-         }, {
-           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);
 
-                 if (cmp > 0) {
-                   break;
-                 } else if (compare(node.key, low) >= 0) {
-                   if (fn.call(ctx, node)) return this; // stop if smth is returned
-                 }
+           if (cache.rtree) {
+             cache.rtree.load(features);
+           }
+         }
+       } // Get data from the API
 
-                 node = node.right;
-               }
-             }
 
-             return this;
+       function loadData(url) {
+         return fetch(url).then(function (response) {
+           if (!response.ok) {
+             throw new Error(response.status + ' ' + response.statusText);
            }
-           /**
-            * Returns all keys in order
-            * @return {Array<Key>}
-            */
-
-         }, {
-           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;
-               }
-             }
 
-             return r;
+           return response.json();
+         }).then(function (result) {
+           if (!result) {
+             return [];
            }
-           /**
-            * Returns `data` fields of all nodes in order.
-            * @return {Array<Value>}
-            */
 
-         }, {
-           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;
-               }
-             }
+           return result.data || [];
+         });
+       } // Partition viewport into higher zoom tiles
 
-             return r;
-           }
-           /**
-            * Returns node at given index
-            * @param  {number} index
-            * @return {?Node}
-            */
 
-         }, {
-           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;
+       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
 
-             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 tiler = utilTiler().zoomExtent([z2, z2]);
+         return tiler.getTiles(projection).map(function (tile) {
+           return tile.extent;
+         });
+       } // Return no more than `limit` results per partition.
 
-             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}
-            */
 
-         }, {
-           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}
-            */
+       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;
+         }, []);
+       }
 
-         }], [{
-           key: "createTree",
-           value: function createTree(keys, values, comparator, presort, noDuplicates) {
-             return new SplayTree(comparator, noDuplicates).load(keys, values, presort);
+       var serviceMapillary = {
+         // Initialize Mapillary
+         init: function init() {
+           if (!_mlyCache) {
+             this.reset();
            }
-         }]);
-
-         return SplayTree;
-       }();
 
-       function loadRecursive(parent, keys, values, start, end) {
-         var size = end - start;
+           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();
+             });
+           }
 
-         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
+           _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: {}
+             }
            };
-           node.left = loadRecursive(node, keys, values, start, middle);
-           node.right = loadRecursive(node, keys, values, middle + 1, end);
-           return node;
-         }
+           _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 = [];
 
-         return null;
-       }
+           _mlyCache.images.rtree.search(bbox).forEach(function (d) {
+             if (d.data.sequence_id) {
+               sequenceIds[d.data.sequence_id] = true;
+             }
+           });
 
-       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;
+           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
 
-         while (true) {
-           do {
-             i++;
-           } while (compare(keys[i], pivot) < 0);
+           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;
 
-           do {
-             j--;
-           } while (compare(keys[j], pivot) > 0);
+             function loaded() {
+               loadedCount += 1; // wait until both files are loaded
 
-           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;
-         }
+               if (loadedCount === 2) resolve();
+             }
 
-         sort(keys, values, left, j, compare);
-         sort(keys, values, j + 1, right, compare);
-       }
+             var head = select('head'); // load mapillary-viewercss
 
-       var NORMAL = 0;
-       var NON_CONTRIBUTING = 1;
-       var SAME_TRANSITION = 2;
-       var DIFFERENT_TRANSITION = 3;
+             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
+
+             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;
 
-       var INTERSECTION = 0;
-       var UNION = 1;
-       var DIFFERENCE = 2;
-       var XOR = 3;
+           if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
+             this.resetTags();
+           }
+         },
+         // Show traffic sign detections in image viewer
+         showSignDetections: function showSignDetections(value) {
+           _mlyShowSignDetections = value;
 
-       /**
-        * @param  {SweepEvent} event
-        * @param  {SweepEvent} prev
-        * @param  {Operation} operation
-        */
+           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]);
 
-       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 (fromDate) {
+             filter.push(['>=', 'capturedAt', new Date(fromDate).getTime()]);
+           }
 
+           if (toDate) {
+             filter.push(['>=', 'capturedAt', new Date(toDate).getTime()]);
+           }
 
-           if (prev) {
-             event.prevInResult = !inResult(prev, operation) || prev.isVertical() ? prev.prevInResult : prev;
+           if (_mlyViewer) {
+             _mlyViewer.setFilter(filter);
            }
-         } // check if the line segment belongs to the Boolean operation
 
+           _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 isInResult = inResult(event, operation);
+           if (isHidden && _mlyViewer) {
+             wrap.selectAll('.photo-wrapper:not(.mly-wrapper)').classed('hide', true);
+             wrap.selectAll('.photo-wrapper.mly-wrapper').classed('hide', false);
 
-         if (isInResult) {
-           event.resultTransition = determineResultTransition(event, operation);
-         } else {
-           event.resultTransition = 0;
-         }
-       }
-       /* eslint-disable indent */
+             _mlyViewer.resize();
+           }
 
-       function inResult(event, operation) {
-         switch (event.type) {
-           case NORMAL:
-             switch (operation) {
-               case INTERSECTION:
-                 return !event.otherInOut;
+           return this;
+         },
+         // Hide the image viewer and resets map markers
+         hideViewer: function hideViewer(context) {
+           _mlyActiveImage = null;
 
-               case UNION:
-                 return event.otherInOut;
+           if (!_mlyFallback && _mlyViewer) {
+             _mlyViewer.getComponent('sequence').stop();
+           }
 
-               case DIFFERENCE:
-                 // return (event.isSubject && !event.otherInOut) ||
-                 //         (!event.isSubject && event.otherInOut);
-                 return event.isSubject && event.otherInOut || !event.isSubject && !event.otherInOut;
+           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);
 
-               case XOR:
-                 return true;
+             if (imageId) {
+               hash.photo = 'mapillary/' + imageId;
+             } else {
+               delete hash.photo;
              }
 
-             break;
+             window.location.replace('#' + utilQsString(hash, true));
+           }
+         },
+         // Highlight the detection in the viewer that is related to the clicked map feature
+         highlightDetection: function highlightDetection(detection) {
+           if (detection) {
+             _mlyHighlightedDetection = detection.id;
+           }
 
-           case SAME_TRANSITION:
-             return operation === INTERSECTION || operation === UNION;
+           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
 
-           case DIFFERENT_TRANSITION:
-             return operation === DIFFERENCE;
+           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
 
-           case NON_CONTRIBUTING:
-             return false;
-         }
+             };
+           }
 
-         return false;
-       }
-       /* eslint-enable indent */
+           _mlyViewer = new mapillary.Viewer(opts);
 
+           _mlyViewer.on('image', imageChanged);
 
-       function determineResultTransition(event, operation) {
-         var thisIn = !event.inOut;
-         var thatIn = !event.otherInOut;
-         var isIn;
+           _mlyViewer.on('bearing', bearingChanged);
 
-         switch (operation) {
-           case INTERSECTION:
-             isIn = thisIn && thatIn;
-             break;
+           if (_mlyViewerFilter) {
+             _mlyViewer.setFilter(_mlyViewerFilter);
+           } // Register viewer resize handler
 
-           case UNION:
-             isIn = thisIn || thatIn;
-             break;
 
-           case XOR:
-             isIn = thisIn ^ thatIn;
-             break;
+           context.ui().photoviewer.on('resize.mapillary', function () {
+             if (_mlyViewer) _mlyViewer.resize();
+           }); // imageChanged: called after the viewer has changed images and is ready.
 
-           case DIFFERENCE:
-             if (event.isSubject) {
-               isIn = thisIn && !thatIn;
-             } else {
-               isIn = thatIn && !thisIn;
+           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);
+
+             if (_mlyShowFeatureDetections || _mlyShowSignDetections) {
+               that.updateDetections(image.id, "".concat(apiUrl, "/").concat(image.id, "/detections?access_token=").concat(accessToken, "&fields=id,image,geometry,value"));
              }
 
-             break;
-         }
+             dispatch$4.call('imageChanged');
+           } // bearingChanged: called when the bearing changes in the image viewer.
 
-         return isIn ? +1 : -1;
-       }
 
-       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);
+           function bearingChanged(e) {
+             dispatch$4.call('bearingChanged', undefined, e);
+           }
+         },
+         // 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
+             });
+           }
 
-           /**
-            * Is left endpoint?
-            * @type {Boolean}
-            */
-           this.left = left;
-           /**
-            * @type {Array.<Number>}
-            */
+           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;
 
-           this.point = point;
-           /**
-            * Other edge reference
-            * @type {SweepEvent}
-            */
+           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] = [];
+                 }
 
-           this.otherEvent = otherEvent;
-           /**
-            * Belongs to source or clipping polygon
-            * @type {Boolean}
-            */
+                 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
 
-           this.isSubject = isSubject;
-           /**
-            * Edge contribution type
-            * @type {Number}
-            */
 
-           this.type = edgeType || NORMAL;
-           /**
-            * In-out transition for the sweepline crossing polygon
-            * @type {Boolean}
-            */
+           function showDetections(detections) {
+             var tagComponent = _mlyViewer.getComponent('tag');
 
-           this.inOut = false;
-           /**
-            * @type {Boolean}
-            */
+             detections.forEach(function (data) {
+               var tag = makeTag(data);
 
-           this.otherInOut = false;
-           /**
-            * Previous event in result?
-            * @type {SweepEvent}
-            */
+               if (tag) {
+                 tagComponent.add([tag]);
+               }
+             });
+           } // Create a Mapillary JS tag object
 
-           this.prevInResult = null;
-           /**
-            * Type of result transition (0 = not in result, +1 = out-in, -1, in-out)
-            * @type {Number}
-            */
 
-           this.resultTransition = 0; // connection step
+           function makeTag(data) {
+             var valueParts = data.value.split('--');
+             if (!valueParts.length) return;
+             var tag;
+             var text;
+             var color = 0xffffff;
 
-           /**
-            * @type {Number}
-            */
+             if (_mlyHighlightedDetection === data.id) {
+               color = 0xffff00;
+               text = valueParts[1];
 
-           this.otherPos = -1;
-           /**
-            * @type {Number}
-            */
+               if (text === 'flat' || text === 'discrete' || text === 'sign') {
+                 text = valueParts[2];
+               }
 
-           this.outputContourId = -1;
-           this.isExteriorRing = true; // TODO: Looks unused, remove?
-         }
-         /**
-          * @param  {Array.<Number>}  p
-          * @return {Boolean}
-          */
+               text = text.replace(/-/g, ' ');
+               text = text.charAt(0).toUpperCase() + text.slice(1);
+               _mlyHighlightedDetection = null;
+             }
 
+             var decodedGeometry = window.atob(data.geometry);
+             var uintArray = new Uint8Array(decodedGeometry.length);
 
-         _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}
-            */
+             for (var i = 0; i < decodedGeometry.length; i++) {
+               uintArray[i] = decodedGeometry.charCodeAt(i);
+             }
 
-         }, {
-           key: "isAbove",
-           value: function isAbove(p) {
-             return !this.isBelow(p);
+             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 {Boolean}
-            */
+         },
+         // Return the current cache
+         cache: function cache() {
+           return _mlyCache;
+         }
+       };
 
-         }, {
-           key: "isVertical",
-           value: function isVertical() {
-             return this.point[0] === this.otherEvent.point[0];
-           }
-           /**
-            * Does event belong to result?
-            * @return {Boolean}
-            */
+       function validationIssue(attrs) {
+         this.type = attrs.type; // required - name of rule that created the issue (e.g. 'missing_tag')
 
-         }, {
-           key: "inResult",
-           get: function get() {
-             return this.resultTransition !== 0;
-           }
-         }, {
-           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;
-           }
-         }]);
+         this.subtype = attrs.subtype; // optional - category of the issue within the type (e.g. 'relation_type' under 'missing_tag')
 
-         return SweepEvent;
-       }();
+         this.severity = attrs.severity; // required - 'warning' or 'error'
 
-       function equals(p1, p2) {
-         if (p1[0] === p2[0]) {
-           if (p1[1] === p2[1]) {
-             return true;
-           } else {
-             return false;
-           }
-         }
+         this.message = attrs.message; // required - function returning localized string
 
-         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;
-       // };
+         this.reference = attrs.reference; // optional - function(selection) to render reference information
 
-       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
+         this.entityIds = attrs.entityIds; // optional - array of IDs of entities involved in the issue
 
-       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;
+         this.loc = attrs.loc; // optional - [lon, lat] to zoom in on to see the issue
 
-         if (fnow > enow === fnow > -enow) {
-           Q = enow;
-           enow = e[++eindex];
-         } else {
-           Q = fnow;
-           fnow = f[++findex];
-         }
+         this.data = attrs.data; // optional - object containing extra data for the fixes
 
-         var hindex = 0;
+         this.dynamicFixes = attrs.dynamicFixes; // optional - function(context) returning fixes
 
-         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];
-           }
+         this.hash = attrs.hash; // optional - string to further differentiate the issue
 
-           Q = Qnew;
+         this.id = generateID.apply(this); // generated - see below
 
-           if (hh !== 0) {
-             h[hindex++] = hh;
-           }
+         this.key = generateKey.apply(this); // generated - see below (call after generating this.id)
 
-           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];
-             }
+         this.autoFix = null; // generated - if autofix exists, will be set below
+         // A unique, deterministic string hash.
+         // Issues with identical id values are considered identical.
 
-             Q = Qnew;
+         function generateID() {
+           var parts = [this.type];
 
-             if (hh !== 0) {
-               h[hindex++] = hh;
-             }
+           if (this.hash) {
+             // subclasses can pass in their own differentiator
+             parts.push(this.hash);
            }
-         }
 
-         while (eindex < elen) {
-           Qnew = Q + enow;
-           bvirt = Qnew - Q;
-           hh = Q - (Qnew - bvirt) + (enow - bvirt);
-           enow = e[++eindex];
-           Q = Qnew;
+           if (this.subtype) {
+             parts.push(this.subtype);
+           } // include the entities this issue is for
+           // (sort them so the id is deterministic)
+
 
-           if (hh !== 0) {
-             h[hindex++] = hh;
+           if (this.entityIds) {
+             var entityKeys = this.entityIds.slice().sort();
+             parts.push.apply(parts, entityKeys);
            }
-         }
 
-         while (findex < flen) {
-           Qnew = Q + fnow;
-           bvirt = Qnew - Q;
-           hh = Q - (Qnew - bvirt) + (fnow - bvirt);
-           fnow = f[++findex];
-           Q = Qnew;
+           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 (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);
-       }
 
-       /**
-        * Signed area of the triangle (p0, p1, p2)
-        * @param  {Array.<Number>} p0
-        * @param  {Array.<Number>} p1
-        * @param  {Array.<Number>} p2
-        * @return {Number}
-        */
+         function generateKey() {
+           return this.id + ':' + Date.now().toString(); // include time of creation
+         }
 
-       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;
-       }
+         this.extent = function (resolver) {
+           if (this.loc) {
+             return geoExtent(this.loc);
+           }
 
-       /**
-        * @param  {SweepEvent} e1
-        * @param  {SweepEvent} e2
-        * @return {Number}
-        */
+           if (this.entityIds && this.entityIds.length) {
+             return this.entityIds.reduce(function (extent, entityId) {
+               return extent.extend(resolver.entity(entityId).extent(resolver));
+             }, geoExtent());
+           }
 
-       function compareEvents(e1, e2) {
-         var p1 = e1.point;
-         var p2 = e2.point; // Different x-coordinate
+           return null;
+         };
 
-         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
+         this.fixes = function (context) {
+           var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
+           var issue = this;
 
-         if (p1[1] !== p2[1]) return p1[1] > p2[1] ? 1 : -1;
-         return specialCases(e1, e2, p1);
-       }
-       /* eslint-disable no-unused-vars */
+           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);
+               }
+             }));
+           }
 
-       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
+           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
 
-         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;
-         }
+             fix.issue = issue;
 
-         return !e1.isSubject && e2.isSubject ? 1 : -1;
+             if (fix.autoArgs) {
+               issue.autoFix = fix;
+             }
+           });
+           return fixes;
+         };
        }
-       /* eslint-enable no-unused-vars */
-
-       /**
-        * @param  {SweepEvent} se
-        * @param  {Array.<Number>} p
-        * @param  {Queue} queue
-        * @return {Queue}
-        */
-
-       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 */
+       function validationIssueFix(attrs) {
+         this.title = attrs.title; // Required
 
-         if (equals(se.point, se.otherEvent.point)) {
-           console.warn('what is that, a collapsed segment?', se);
-         }
-         /* eslint-enable no-console */
+         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
 
-         r.contourId = l.contourId = se.contourId; // avoid a rounding error. The left event would be processed after the right event
+         this.icon = attrs.icon; // Optional - shows 'iD-icon-wrench' if not set
 
-         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) {}
+         this.entityIds = attrs.entityIds || []; // Optional - used for hover-higlighting.
 
+         this.autoArgs = attrs.autoArgs; // Optional - pass [actions, annotation] arglist if this fix can automatically run
 
-         se.otherEvent.otherEvent = l;
-         se.otherEvent = r;
-         queue.push(l);
-         queue.push(r);
-         return queue;
+         this.issue = null; // Generated link - added by validationIssue
        }
 
-       //const EPS = 1e-9;
-
-       /**
-        * 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
-        */
+       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];
 
+             var expression = _positiveRegex[tagKey].join('|');
 
-       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.
-        */
+             var regex = new RegExp(expression);
+             return function (tags) {
+               return regex.test(tags[tagKey]);
+             };
+           },
+           negativeRegex: function negativeRegex(_negativeRegex) {
+             var tagKey = Object.keys(_negativeRegex)[0];
 
+             var expression = _negativeRegex[tagKey].join('|');
 
-       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:
+             var regex = new RegExp(expression);
+             return function (tags) {
+               return !regex.test(tags[tagKey]);
+             };
+           }
+         };
+       };
 
-         /* eslint-disable arrow-body-style */
+       var buildLineKeys = function buildLineKeys() {
+         return {
+           highway: {
+             rest_area: true,
+             services: true
+           },
+           railway: {
+             roundhouse: true,
+             station: true,
+             traverser: true,
+             turntable: true,
+             wash: true
+           }
+         };
+       };
 
-         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.
+       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 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.
+           var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
+             var values;
+             var isRegex = /regex/gi.test(key);
+             var isEqual = /equals/gi.test(key);
 
-         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 (isRegex || isEqual) {
+               Object.keys(selector[key]).forEach(function (selectorKey) {
+                 values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);
 
-             if (s < 0 || s > 1) {
-               // not on line segment a
-               return null;
-             }
+                 if (expectedTags.hasOwnProperty(selectorKey)) {
+                   values = values.concat(expectedTags[selectorKey]);
+                 }
 
-             var t = crossProduct(e, va) / kross;
+                 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 (t < 0 || t > 1) {
-               // not on line segment b
-               return null;
-             }
+               if (expectedTags.hasOwnProperty(tagKey)) {
+                 values = values.concat(expectedTags[tagKey]);
+               }
 
-             if (s === 0 || s === 1) {
-               // on an endpoint of line segment a
-               return noEndpointTouch ? null : [toPoint(a1, s, va)];
+               expectedTags[tagKey] = values;
              }
 
-             if (t === 0 || t === 1) {
-               // on an endpoint of line segment b
-               return noEndpointTouch ? null : [toPoint(b1, t, vb)];
-             }
+             return expectedTags;
+           }, {});
+           return tagMap;
+         },
+         // inspired by osmWay#isArea()
+         inferGeometry: function inferGeometry(tagMap) {
+           var _lineKeys = this._lineKeys;
+           var _areaKeys = this._areaKeys;
 
-             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);
+           var keyValueDoesNotImplyArea = function keyValueDoesNotImplyArea(key) {
+             return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
+           };
 
+           var keyValueImpliesLine = function keyValueImpliesLine(key) {
+             return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
+           };
 
-         kross = crossProduct(e, va);
-         sqrKross = kross * kross;
+           if (tagMap.hasOwnProperty('area')) {
+             if (tagMap.area.indexOf('yes') > -1) {
+               return 'area';
+             }
 
-         if (sqrKross > 0
-         /* EPS * sqLenB * sqLenE */
-         ) {
-             // Lines are just parallel, not the same. No overlap.
-             return null;
+             if (tagMap.area.indexOf('no') > -1) {
+               return 'line';
+             }
            }
 
-         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.
-
-         if (smin <= 1 && smax >= 0) {
-           // overlap on an end point
-           if (smin === 1) {
-             return noEndpointTouch ? null : [toPoint(a1, smin > 0 ? smin : 0, va)];
-           }
+           for (var key in tagMap) {
+             if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
+               return 'area';
+             }
 
-           if (smax === 0) {
-             return noEndpointTouch ? null : [toPoint(a1, smax < 1 ? smax : 1, va)];
+             if (key in _lineKeys && keyValueImpliesLine(key)) {
+               return 'area';
+             }
            }
 
-           if (noEndpointTouch && smin === 0 && smax === 1) return null; // There's overlap on a segment -- two points of intersection. Return both.
-
-           return [toPoint(a1, smin > 0 ? smin : 0, va), toPoint(a1, smax < 1 ? smax : 1, va)];
-         }
-
-         return null;
-       }
-
-       /**
-        * @param  {SweepEvent} se1
-        * @param  {SweepEvent} se2
-        * @param  {Queue}      queue
-        * @return {Number}
-        */
+           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]
+                 }));
+               }
+             }
+           };
 
-       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;
+           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;
          }
+       };
 
-         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
-
+       var apibase$2 = 'https://nominatim.openstreetmap.org/';
+       var _inflight$2 = {};
 
-         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
+       var _nominatimCache;
 
+       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 (!equals(se2.point, inter[0]) && !equals(se2.otherEvent.point, inter[0])) {
-             divideSegment(se2, inter[0], queue);
+           if (cached.length > 0) {
+             if (callback) callback(null, cached[0].data);
+             return;
            }
 
-           return 1;
-         } // The line segments associated to se1 and se2 overlap
-
+           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];
 
-         var events = [];
-         var leftCoincide = false;
-         var rightCoincide = false;
+             if (result && result.error) {
+               throw new Error(result.error);
+             }
 
-         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 extent = geoExtent(loc).padByMeters(200);
 
-         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);
-         }
+             _nominatimCache.insert(Object.assign(extent.bbox(), {
+               data: result
+             }));
 
-         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;
+             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 (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);
-           }
+             if (result && result.error) {
+               throw new Error(result.error);
+             }
 
-           return 2;
-         } // the line segments share the right endpoint
+             if (callback) callback(null, result);
+           })["catch"](function (err) {
+             delete _inflight$2[url];
+             if (err.name === 'AbortError') return;
+             if (callback) callback(err.message);
+           });
+         }
+       };
 
+       // for punction see https://stackoverflow.com/a/21224179
 
-         if (rightCoincide) {
-           divideSegment(events[0], events[1].point, queue);
-           return 3;
-         } // no line segment includes totally the other one
+       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 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/laboratory","healthcare/physiotherapist","healthcare/sample_collection","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/boutique","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"],parcel_locker:["amenity/parcel_locker","amenity/vending_machine"],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/clinic","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
+       };
 
-         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
+       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
+       };
 
+       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
+       };
 
-         divideSegment(events[0], events[1].point, queue);
-         divideSegment(events[3].otherEvent, events[2].point, queue);
-         return 3;
-       }
+       var matchGroups = matchGroupsJSON.matchGroups;
+       var trees = treesJSON.trees;
+       var Matcher = /*#__PURE__*/function () {
+         //
+         // `constructor`
+         // initialize the genericWords regexes
+         function Matcher() {
+           var _this = this;
 
-       /**
-        * @param  {SweepEvent} le1
-        * @param  {SweepEvent} le2
-        * @return {Number}
-        */
+           _classCallCheck$1(this, Matcher);
 
-       function compareSegments(le1, le2) {
-         if (le1 === le2) return 0; // Segments are not collinear
+           // 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]',
+           //   …
+           // }
 
-         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
+           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 {…},
+           //   …
+           // }
 
-           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 ?
+           this.locationSets = undefined; // The `locationIndex` is an instance of which-polygon spatial index for the locationSets.
 
-           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
+           this.locationIndex = undefined; // Array of match conflict pairs (currently unused)
 
-           return le1.isBelow(le2.point) ? -1 : 1;
-         }
+           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 (le1.isSubject === le2.isSubject) {
-           // same polygon
-           var p1 = le1.point,
-               p2 = le2.point;
 
-           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;
-         }
+         _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
 
-         return compareEvents(le1, le2) === 1 ? 1 : -1;
-       }
 
-       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;
+               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
 
-         while (eventQueue.length !== 0) {
-           var event = eventQueue.pop();
-           sortedEvents.push(event); // optimization by bboxes for intersection and difference goes here
+               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 (operation === INTERSECTION && event.point[0] > rightbound || operation === DIFFERENCE && event.point[0] > sbbox[2]) {
-             break;
-           }
+               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..
 
-           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);
+               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 (next) {
-               if (possibleIntersection(event, next.key, eventQueue) === 2) {
-                 computeFields(event, prevEvent, operation);
-                 computeFields(event, next.key, operation);
-               }
-             }
+               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`
 
-             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);
+               var skipGenericKV = skipGenericKVMatches(t, k, v); // We will collect the generic KV pairs anyway (for the purpose of filtering them out of matchTags)
 
-             if (prev && next) {
-               if (prev !== begin) prev = sweepLine.prev(prev);else prev = null;
-               next = sweepLine.next(next);
-               sweepLine.remove(event);
+               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`)
 
-               if (next && prev) {
-                 possibleIntersection(prev.key, next.key, eventQueue);
-               }
-             }
-           }
-         }
+               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 sortedEvents;
-       }
+                   matchGroupKV.add(otherkv);
+                   var otherk = otherkv.split('/', 2)[0]; // we might pick up a `shop/yes`
 
-       var Contour = /*#__PURE__*/function () {
-         /**
-          * Contour
-          *
-          * @class {Contour}
-          */
-         function Contour() {
-           _classCallCheck(this, Contour);
+                   genericKV.add("".concat(otherk, "/yes"));
+                 });
+               }); // For each item, insert all [key, value, name] combinations into the match index
 
-           this.points = [];
-           this.holeIds = [];
-           this.holeOf = null;
-           this.depth = null;
-         }
+               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`)
 
-         _createClass(Contour, [{
-           key: "isExterior",
-           value: function isExterior() {
-             return this.holeOf == null;
-           }
-         }]);
+                 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..
 
-         return Contour;
-       }();
 
-       /**
-        * @param  {Array.<SweepEvent>} sortedEvents
-        * @return {Array.<SweepEvent>}
-        */
+                 var kvTags = ["".concat(thiskv)].concat(item.matchTags || []);
 
-       function orderEvents(sortedEvents) {
-         var event, i, len, tmp;
-         var resultEvents = [];
+                 if (!skipGenericKV) {
+                   kvTags = kvTags.concat(Array.from(genericKV)); // #3454 - match some generic tags
+                 } // Index all the namelike tag values
 
-         for (i = 0, len = sortedEvents.length; i < len; i++) {
-           event = sortedEvents[i];
 
-           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
+                 Object.keys(item.tags).forEach(function (osmkey) {
+                   if (notName.test(osmkey)) return; // osmkey is not a namelike tag, skip
 
+                   var osmvalue = item.tags[osmkey];
+                   if (!osmvalue || excludeRegexes.some(function (regex) {
+                     return regex.test(osmvalue);
+                   })) return; // osmvalue missing or excluded
 
-         var sorted = false;
+                   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`)
 
-         while (!sorted) {
-           sorted = true;
+                 if (keepMatchNames.size) {
+                   item.matchNames = Array.from(keepMatchNames);
+                 } else {
+                   delete item.matchNames;
+                 }
+               }); // each item
+             }); // each tkv
+             // Insert this item into the matchIndex
 
-           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;
-             }
-           }
-         }
+             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;
+               }
 
-         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
+               var branch = that.matchIndex.get(kv);
 
+               if (!branch) {
+                 branch = {
+                   primary: new Map(),
+                   alternate: new Map(),
+                   excludeGeneric: new Map(),
+                   excludeNamed: new Map()
+                 };
+                 that.matchIndex.set(kv, branch);
+               }
 
-         for (i = 0, len = resultEvents.length; i < len; i++) {
-           event = resultEvents[i];
+               var leaf = branch[which].get(nsimple);
 
-           if (!event.left) {
-             tmp = event.otherPos;
-             event.otherPos = event.otherEvent.otherPos;
-             event.otherEvent.otherPos = tmp;
-           }
-         }
+               if (!leaf) {
+                 leaf = new Set();
+                 branch[which].set(nsimple, leaf);
+               }
 
-         return resultEvents;
-       }
-       /**
-        * @param  {Number} pos
-        * @param  {Array.<SweepEvent>} resultEvents
-        * @param  {Object>}    processed
-        * @return {Number}
-        */
+               leaf.add(itemID); // insert
+               // check for duplicates - #5625
 
+               if (!/yes$/.test(kv)) {
+                 // ignore genericKV like amenity/yes, building/yes, etc
+                 var kvnsimple = "".concat(kv, "/").concat(nsimple);
+                 var existing = seenTree.get(kvnsimple);
 
-       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;
+                 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;
+                 }
 
-         while (newPos < length && p1[0] === p[0] && p1[1] === p[1]) {
-           if (!processed[newPos]) {
-             return newPos;
-           } else {
-             newPos++;
-           }
+                 seenTree.set(kvnsimple, t);
+               }
+             } // For certain categories we do not want to match generic KV pairs like `building/yes` or `amenity/yes`
 
-           p1 = resultEvents[newPos].point;
-         }
 
-         newPos = pos - 1;
+             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: [ {}, {}, … ] },
+           //    …
+           // }
+           //
 
-         while (processed[newPos] && newPos > origPos) {
-           newPos--;
-         }
+         }, {
+           key: "buildLocationIndex",
+           value: function buildLocationIndex(data, loco) {
+             var that = this;
+             if (that.locationIndex) return; // it was built already
 
-         return newPos;
-       }
+             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?
 
-       function initializeContourFromContext(event, contours, contourId) {
-         var contour = new Contour();
+                 var resolved;
 
-         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".
+                 try {
+                   resolved = loco.resolveLocationSet(item.locationSet); // resolve a feature for this locationSet
+                 } catch (err) {
+                   console.warn("buildLocationIndex: ".concat(err.message)); // couldn't resolve
+                 }
 
-           var lowerContourId = prevInResult.outputContourId;
-           var lowerResultTransition = prevInResult.resultTransition;
+                 if (!resolved || !resolved.id) return;
+                 that.itemLocation.set(item.id, resolved.id); // link it to the item
 
-           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 (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..
 
-             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;
-             } 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;
-             }
-           } 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;
-         }
+                 var feature = _cloneDeep(resolved.feature);
 
-         return contour;
-       }
-       /**
-        * @param  {Array.<SweepEvent>} sortedEvents
-        * @return {Array.<*>} polygons
-        */
+                 feature.id = resolved.id; // Important: always use the locationSet `id` (`+[Q30]`), not the feature `id` (`Q30`)
 
+                 feature.properties.id = resolved.id;
 
-       function connectEdges(sortedEvents) {
-         var i, len;
-         var resultEvents = orderEvents(sortedEvents); // "false"-filled array
+                 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;
+                 }
 
-         var processed = {};
-         var contours = [];
+                 that.locationSets.set(resolved.id, feature);
+               });
+             });
+             that.locationIndex = whichPolygon_1({
+               type: 'FeatureCollection',
+               features: _toConsumableArray(that.locationSets.values())
+             });
 
-         var _loop = function _loop() {
-           if (processed[i]) {
-             return "continue";
-           }
+             function _cloneDeep(obj) {
+               return JSON.parse(JSON.stringify(obj));
+             }
+           } //
+           // `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`
+           //
+           //
 
-           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
+         }, {
+           key: "match",
+           value: function match(k, v, n, loc) {
+             var that = this;
 
-           var markAsProcessed = function markAsProcessed(pos) {
-             processed[pos] = true;
-             resultEvents[pos].outputContourId = contourId;
-           };
+             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.
 
-           var pos = i;
-           var origPos = i;
-           var initial = resultEvents[i].point;
-           contour.points.push(initial);
-           /* eslint no-constant-condition: "off" */
 
-           while (true) {
-             markAsProcessed(pos);
-             pos = resultEvents[pos].otherPos;
-             markAsProcessed(pos);
-             contour.points.push(resultEvents[pos].point);
-             pos = nextPos(pos, resultEvents, processed, origPos);
+             var matchLocations;
 
-             if (pos == origPos) {
-               break;
+             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);
              }
-           }
 
-           contours.push(contour);
-         };
+             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;
 
-         for (i = 0, len = resultEvents.length; i < len; i++) {
-           var _ret = _loop();
+                 for (var i = 0; i < matchGroup.length; i++) {
+                   var otherkv = matchGroup[i];
+                   if (otherkv === kv) continue; // skip self
 
-           if (_ret === "continue") continue;
-         }
+                   didMatch = tryMatch(which, otherkv);
+                   if (didMatch) return;
+                 }
+               } // If finished 'exclude' pass and still haven't matched anything, try the global `genericWords.json` patterns
 
-         return contours;
-       }
 
-       var tinyqueue = TinyQueue;
-       var _default = TinyQueue;
+               if (which === 'exclude') {
+                 var regex = _toConsumableArray(that.genericWords.values()).find(function (regex) {
+                   return regex.test(n);
+                 });
 
-       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;
+                 if (regex) {
+                   results.push({
+                     match: 'excludeGeneric',
+                     pattern: String(regex)
+                   }); // note no `branch`, no `kv`
 
-         if (this.length > 0) {
-           for (var i = (this.length >> 1) - 1; i >= 0; i--) {
-             this._down(i);
-           }
-         }
-       }
+                   return;
+                 }
+               }
+             }
 
-       function defaultCompare$1(a, b) {
-         return a < b ? -1 : a > b ? 1 : 0;
-       }
+             function tryMatch(which, kv) {
+               var branch = that.matchIndex.get(kv);
+               if (!branch) return;
 
-       TinyQueue.prototype = {
-         push: function push(item) {
-           this.data.push(item);
-           this.length++;
+               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);
+                 });
 
-           this._up(this.length - 1);
-         },
-         pop: function pop() {
-           if (this.length === 0) return undefined;
-           var top = this.data[0];
-           this.length--;
+                 if (regex) {
+                   results.push({
+                     match: 'excludeNamed',
+                     pattern: String(regex),
+                     kv: kv
+                   });
+                   return;
+                 }
 
-           if (this.length > 0) {
-             this.data[0] = this.data[this.length];
+                 regex = _toConsumableArray(branch.excludeGeneric.values()).find(function (regex) {
+                   return regex.test(n);
+                 });
 
-             this._down(0);
-           }
+                 if (regex) {
+                   results.push({
+                     match: 'excludeGeneric',
+                     pattern: String(regex),
+                     kv: kv
+                   });
+                   return;
+                 }
 
-           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];
+                 return;
+               }
 
-           while (pos > 0) {
-             var parent = pos - 1 >> 1;
-             var current = data[parent];
-             if (compare(item, current) >= 0) break;
-             data[pos] = current;
-             pos = parent;
-           }
+               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)
 
-           data[pos] = item;
-         },
-         _down: function _down(pos) {
-           var data = this.data;
-           var compare = this.compare;
-           var halfLength = this.length >> 1;
-           var item = data[pos];
+               var hits = Array.from(leaf).map(function (itemID) {
+                 var area = Infinity;
 
-           while (pos < halfLength) {
-             var left = (pos << 1) + 1;
-             var right = left + 1;
-             var best = data[left];
+                 if (that.itemLocation && that.locationSets) {
+                   var location = that.locationSets.get(that.itemLocation.get(itemID));
+                   area = location && location.properties.area || Infinity;
+                 }
 
-             if (right < this.length && compare(data[right], best) < 0) {
-               left = right;
-               best = data[right];
-             }
+                 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 (compare(best, item) >= 0) break;
-             data[pos] = best;
-             pos = left;
-           }
+               if (matchLocations) {
+                 hits = hits.filter(isValidLocation);
+                 sortFn = byAreaAscending;
+               }
 
-           data[pos] = item;
-         }
-       };
-       tinyqueue["default"] = _default;
+               if (!hits.length) return; // push results
 
-       var max$5 = Math.max;
-       var min$8 = Math.min;
-       var contourId = 0;
+               hits.sort(sortFn).forEach(function (hit) {
+                 if (seen.has(hit.itemID)) return;
+                 seen.add(hit.itemID);
+                 results.push(hit);
+               });
+               return true;
 
-       function processPolygon(contourOrHole, isSubject, depth, Q, bbox, isExteriorRing) {
-         var i, len, s1, s2, e1, e2;
+               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.
 
-         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 (s1[0] === s2[0] && s1[1] === s2[1]) {
-             continue; // skip collapsed edges, or it breaks
-           }
+               function byAreaAscending(hitA, hitB) {
+                 return hitA.area - hitB.area;
+               } // Sort larger (more worldwide) locations first.
 
-           e1.contourId = e2.contourId = depth;
 
-           if (!isExteriorRing) {
-             e1.isExteriorRing = false;
-             e2.isExteriorRing = false;
-           }
+               function byAreaDescending(hitA, hitB) {
+                 return hitB.area - hitA.area;
+               }
+             }
+           } //
+           // `getWarnings()`
+           // Return any warnings discovered when buiding the index.
+           // (currently this does nothing)
+           //
 
-           if (compareEvents(e1, e2) > 0) {
-             e2.left = true;
-           } else {
-             e1.left = true;
+         }, {
+           key: "getWarnings",
+           value: function getWarnings() {
+             return this.warnings;
            }
+         }]);
 
-           var x = s1[0],
-               y = s1[1];
-           bbox[0] = min$8(bbox[0], x);
-           bbox[1] = min$8(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 Matcher;
+       }();
 
-           Q.push(e1);
-           Q.push(e2);
-         }
-       }
+       /*
+           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.
+        */
 
-       function fillQueue(subject, clipping, sbbox, cbbox, operation) {
-         var eventQueue = new tinyqueue(null, compareEvents);
-         var polygonSet, isExteriorRing, i, ii, j, jj; //, k, kk;
+       function coreDifference(base, head) {
+         var _changes = {};
+         var _didChange = {}; // 'addition', 'deletion', 'geometry', 'properties'
 
-         for (i = 0, ii = subject.length; i < ii; i++) {
-           polygonSet = subject[i];
+         var _diff = {};
 
-           for (j = 0, jj = polygonSet.length; j < jj; j++) {
-             isExteriorRing = j === 0;
-             if (isExteriorRing) contourId++;
-             processPolygon(polygonSet[j], true, contourId, eventQueue, sbbox, isExteriorRing);
-           }
-         }
+         function checkEntityID(id) {
+           var h = head.entities[id];
+           var b = base.entities[id];
+           if (h === b) return;
+           if (_changes[id]) return;
 
-         for (i = 0, ii = clipping.length; i < ii; i++) {
-           polygonSet = clipping[i];
+           if (!h && b) {
+             _changes[id] = {
+               base: b,
+               head: h
+             };
+             _didChange.deletion = true;
+             return;
+           }
 
-           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);
+           if (h && !b) {
+             _changes[id] = {
+               base: b,
+               head: h
+             };
+             _didChange.addition = true;
+             return;
            }
-         }
 
-         return eventQueue;
-       }
+           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;
+             }
 
-       var EMPTY = [];
+             if (h.loc && b.loc && !geoVecEqual(h.loc, b.loc)) {
+               _changes[id] = {
+                 base: b,
+                 head: h
+               };
+               _didChange.geometry = true;
+             }
 
-       function trivialOperation(subject, clipping, operation) {
-         var result = null;
+             if (h.nodes && b.nodes && !fastDeepEqual(h.nodes, b.nodes)) {
+               _changes[id] = {
+                 base: b,
+                 head: h
+               };
+               _didChange.geometry = true;
+             }
 
-         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;
+             if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
+               _changes[id] = {
+                 base: b,
+                 head: h
+               };
+               _didChange.properties = true;
+             }
            }
          }
 
-         return result;
-       }
-
-       function compareBBoxes(subject, clipping, sbbox, cbbox, operation) {
-         var result = null;
+         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)));
 
-         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);
+           for (var i = 0; i < ids.length; i++) {
+             checkEntityID(ids[i]);
            }
          }
 
-         return result;
-       }
-
-       function _boolean(subject, clipping, operation) {
-         if (typeof subject[0][0][0] === 'number') {
-           subject = [subject];
-         }
+         load();
 
-         if (typeof clipping[0][0][0] === 'number') {
-           clipping = [clipping];
-         }
+         _diff.length = function length() {
+           return Object.keys(_changes).length;
+         };
 
-         var trivial = trivialOperation(subject, clipping, operation);
+         _diff.changes = function changes() {
+           return _changes;
+         };
 
-         if (trivial) {
-           return trivial === EMPTY ? null : trivial;
-         }
+         _diff.didChange = _didChange; // pass true to include affected relation members
 
-         var sbbox = [Infinity, Infinity, -Infinity, -Infinity];
-         var cbbox = [Infinity, Infinity, -Infinity, -Infinity]; // console.time('fill queue');
+         _diff.extantIDs = function extantIDs(includeRelMembers) {
+           var result = new Set();
+           Object.keys(_changes).forEach(function (id) {
+             if (_changes[id].head) {
+               result.add(id);
+             }
 
-         var eventQueue = fillQueue(subject, clipping, sbbox, cbbox, operation); //console.timeEnd('fill queue');
+             var h = _changes[id].head;
+             var b = _changes[id].base;
+             var entity = h || b;
 
-         trivial = compareBBoxes(subject, clipping, sbbox, cbbox, operation);
+             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);
+         };
 
-         if (trivial) {
-           return trivial === EMPTY ? null : trivial;
-         } // console.time('subdivide edges');
+         _diff.modified = function modified() {
+           var result = [];
+           Object.values(_changes).forEach(function (change) {
+             if (change.base && change.head) {
+               result.push(change.head);
+             }
+           });
+           return result;
+         };
 
+         _diff.created = function created() {
+           var result = [];
+           Object.values(_changes).forEach(function (change) {
+             if (!change.base && change.head) {
+               result.push(change.head);
+             }
+           });
+           return result;
+         };
 
-         var sortedEvents = subdivide(eventQueue, subject, clipping, sbbox, cbbox, operation); //console.timeEnd('subdivide edges');
-         // console.time('connect vertices');
+         _diff.deleted = function deleted() {
+           var result = [];
+           Object.values(_changes).forEach(function (change) {
+             if (change.base && !change.head) {
+               result.push(change.base);
+             }
+           });
+           return result;
+         };
 
-         var contours = connectEdges(sortedEvents); //console.timeEnd('connect vertices');
-         // Convert contours to polygons
+         _diff.summary = function summary() {
+           var relevant = {};
+           var keys = Object.keys(_changes);
 
-         var polygons = [];
+           for (var i = 0; i < keys.length; i++) {
+             var change = _changes[keys[i]];
 
-         for (var i = 0; i < contours.length; i++) {
-           var contour = contours[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);
 
-           if (contour.isExterior()) {
-             // The exterior ring goes first
-             var rings = [contour.points]; // Followed by holes if any
+               if (moved) {
+                 addParents(change.head);
+               }
 
-             for (var j = 0; j < contour.holeIds.length; j++) {
-               var holeId = contour.holeIds[j];
-               rings.push(contours[holeId].points);
+               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');
              }
-
-             polygons.push(rings);
            }
-         }
-
-         return polygons;
-       }
-
-       function union(subject, clipping) {
-         return _boolean(subject, clipping, UNION);
-       }
-
-       /*! 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;
-
-         for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
-         m = e & (1 << -nBits) - 1;
-         e >>= -nBits;
-         nBits += mLen;
-
-         for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
-
-         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;
-         }
-
-         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);
+           return Object.values(relevant);
 
-           if (value * (c = Math.pow(2, -e)) < 1) {
-             e--;
-             c *= 2;
+           function addEntity(entity, graph, changeType) {
+             relevant[entity.id] = {
+               entity: entity,
+               graph: graph,
+               changeType: changeType
+             };
            }
 
-           if (e + eBias >= 1) {
-             value += rt / c;
-           } else {
-             value += rt * Math.pow(2, 1 - eBias);
-           }
+           function addParents(entity) {
+             var parents = head.parentWays(entity);
 
-           if (value * c >= 2) {
-             e++;
-             c /= 2;
-           }
+             for (var j = parents.length - 1; j >= 0; j--) {
+               var parent = parents[j];
 
-           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;
+               if (!(parent.id in relevant)) {
+                 addEntity(parent, head, 'modified');
+               }
+             }
            }
-         }
+         }; // returns complete set of entities that require a redraw
+         //  (optionally within given `extent`)
 
-         for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
 
-         e = e << mLen | m;
-         eLen += mLen;
+         _diff.complete = function complete(extent) {
+           var result = {};
+           var id, change;
 
-         for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
+           for (id in _changes) {
+             change = _changes[id];
+             var h = change.head;
+             var b = change.base;
+             var entity = h || b;
+             var i;
 
-         buffer[offset + i - d] |= s * 128;
-       };
+             if (extent && (!h || !h.intersects(extent, head)) && (!b || !b.intersects(extent, base))) {
+               continue;
+             }
 
-       var ieee754$1 = {
-         read: read$6,
-         write: write$6
-       };
+             result[id] = h;
 
-       var pbf = Pbf;
+             if (entity.type === 'way') {
+               var nh = h ? h.nodes : [];
+               var nb = b ? b.nodes : [];
+               var diff;
+               diff = utilArrayDifference(nh, nb);
 
-       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;
-       }
+               for (i = 0; i < diff.length; i++) {
+                 result[diff[i]] = head.hasEntity(diff[i]);
+               }
 
-       Pbf.Varint = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum
+               diff = utilArrayDifference(nb, nh);
 
-       Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64
+               for (i = 0; i < diff.length; i++) {
+                 result[diff[i]] = head.hasEntity(diff[i]);
+               }
+             }
 
-       Pbf.Bytes = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields
+             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);
 
-       Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32
+               for (i = 0; i < ids.length; i++) {
+                 var member = head.hasEntity(ids[i]);
+                 if (!member) continue; // not downloaded
 
-       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 (extent && !member.intersects(extent, head)) continue; // not visible
 
-       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;
+                 result[ids[i]] = member;
+               }
+             }
 
-           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);
+             addParents(head.parentWays(entity), result);
+             addParents(head.parentRelations(entity), result);
            }
 
            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;
 
-           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 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);
+             }
+           }
+         };
+
+         return _diff;
+       }
 
+       function coreTree(head) {
+         // tree for entities
+         var _rtree = new RBush();
 
-           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 || [];
+         var _bboxes = {}; // maintain a separate tree for granular way segments
 
-           while (this.pos < end) {
-             arr.push(this.readVarint(isSigned));
-           }
+         var _segmentsRTree = new RBush();
 
-           return arr;
-         },
-         readPackedSVarint: function readPackedSVarint(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readSVarint());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+         var _segmentsBBoxes = {};
+         var _segmentsByWayId = {};
+         var tree = {};
 
-           while (this.pos < end) {
-             arr.push(this.readSVarint());
-           }
+         function entityBBox(entity) {
+           var bbox = entity.extent(head).bbox();
+           bbox.id = entity.id;
+           _bboxes[entity.id] = bbox;
+           return bbox;
+         }
 
-           return arr;
-         },
-         readPackedBoolean: function readPackedBoolean(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readBoolean());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+         function segmentBBox(segment) {
+           var extent = segment.extent(head); // extent can be null if the node entities aren't in the graph for some reason
 
-           while (this.pos < end) {
-             arr.push(this.readBoolean());
-           }
+           if (!extent) return null;
+           var bbox = extent.bbox();
+           bbox.segment = segment;
+           _segmentsBBoxes[segment.id] = bbox;
+           return bbox;
+         }
 
-           return arr;
-         },
-         readPackedFloat: function readPackedFloat(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readFloat());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+         function removeEntity(entity) {
+           _rtree.remove(_bboxes[entity.id]);
 
-           while (this.pos < end) {
-             arr.push(this.readFloat());
-           }
+           delete _bboxes[entity.id];
 
-           return arr;
-         },
-         readPackedDouble: function readPackedDouble(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readDouble());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+           if (_segmentsByWayId[entity.id]) {
+             _segmentsByWayId[entity.id].forEach(function (segment) {
+               _segmentsRTree.remove(_segmentsBBoxes[segment.id]);
 
-           while (this.pos < end) {
-             arr.push(this.readDouble());
+               delete _segmentsBBoxes[segment.id];
+             });
+
+             delete _segmentsByWayId[entity.id];
            }
+         }
 
-           return arr;
-         },
-         readPackedFixed32: function readPackedFixed32(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readFixed32());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+         function loadEntities(entities) {
+           _rtree.load(entities.map(entityBBox));
 
-           while (this.pos < end) {
-             arr.push(this.readFixed32());
-           }
+           var segments = [];
+           entities.forEach(function (entity) {
+             if (entity.segments) {
+               var entitySegments = entity.segments(head); // cache these to make them easy to remove later
 
-           return arr;
-         },
-         readPackedSFixed32: function readPackedSFixed32(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed32());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+               _segmentsByWayId[entity.id] = entitySegments;
+               segments = segments.concat(entitySegments);
+             }
+           });
+           if (segments.length) _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean));
+         }
 
-           while (this.pos < end) {
-             arr.push(this.readSFixed32());
-           }
+         function updateParents(entity, insertions, memo) {
+           head.parentWays(entity).forEach(function (way) {
+             if (_bboxes[way.id]) {
+               removeEntity(way);
+               insertions[way.id] = way;
+             }
 
-           return arr;
-         },
-         readPackedFixed64: function readPackedFixed64(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readFixed64());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+             updateParents(way, insertions, memo);
+           });
+           head.parentRelations(entity).forEach(function (relation) {
+             if (memo[entity.id]) return;
+             memo[entity.id] = true;
 
-           while (this.pos < end) {
-             arr.push(this.readFixed64());
-           }
+             if (_bboxes[relation.id]) {
+               removeEntity(relation);
+               insertions[relation.id] = relation;
+             }
 
-           return arr;
-         },
-         readPackedSFixed64: function readPackedSFixed64(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed64());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+             updateParents(relation, insertions, memo);
+           });
+         }
 
-           while (this.pos < end) {
-             arr.push(this.readSFixed64());
+         tree.rebase = function (entities, force) {
+           var insertions = {};
+
+           for (var i = 0; i < entities.length; i++) {
+             var entity = entities[i];
+             if (!entity.visible) continue;
+
+             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, {});
            }
 
-           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;
+           loadEntities(Object.values(insertions));
+           return tree;
+         };
 
-           while (length < this.pos + min) {
-             length *= 2;
+         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);
+             });
            }
 
-           if (length !== this.length) {
-             var buf = new Uint8Array(length);
-             buf.set(this.buf);
-             this.buf = buf;
-             this.length = length;
+           if (changed.geometry) {
+             diff.modified().forEach(function (entity) {
+               removeEntity(entity);
+               insertions[entity.id] = entity;
+               updateParents(entity, insertions, {});
+             });
            }
-         },
-         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;
+           if (changed.addition) {
+             diff.created().forEach(function (entity) {
+               insertions[entity.id] = entity;
+             });
            }
 
-           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
+           loadEntities(Object.values(insertions));
+         } // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`
 
-           var startPos = this.pos; // write the string directly to the buffer and see how much was written
 
-           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
+         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`
 
-           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 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
+         tree.waySegments = function (extent, graph) {
+           updateToGraph(graph);
+           return _segmentsRTree.search(extent.bbox()).map(function (bbox) {
+             return bbox.segment;
+           });
+         };
 
-           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
+         return tree;
+       }
 
-           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));
+       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);
+         };
+       }
+
+       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);
+
+         shaded.close = function () {
+           shaded.transition().duration(200).style('opacity', 0).remove();
+           modal.transition().duration(200).style('top', '0px');
+           select(document).call(keybinding.unbind);
+         };
+
+         var modal = shaded.append('div').attr('class', 'modal fillL');
+         modal.append('input').attr('class', 'keytrap keytrap-first').on('focus.keytrap', moveFocusToLast);
+
+         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);
          }
-       };
 
-       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');
+         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);
+         }
+
+         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 (node) {
+             node.focus();
+           } else {
+             select(this).node().blur();
+           }
+         }
+
+         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();
+           }
+         }
        }
 
-       function readPackedEnd(pbf) {
-         return pbf.type === Pbf.Bytes ? pbf.readVarint() + pbf.pos : pbf.pos + 1;
-       }
+       function uiLoading(context) {
+         var _modalSelection = select(null);
+
+         var _message = '';
+         var _blocking = false;
+
+         var loading = function loading(selection) {
+           _modalSelection = uiModal(selection, _blocking);
+
+           var loadertext = _modalSelection.select('.content').classed('loading-modal', true).append('div').attr('class', 'modal-section fillL');
+
+           loadertext.append('img').attr('class', 'loader').attr('src', context.imagePath('loader-white.gif'));
+           loadertext.append('h3').html(_message);
+
+           _modalSelection.select('button.close').attr('class', 'hide');
+
+           return loading;
+         };
+
+         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;
+         };
+
+         loading.close = function () {
+           _modalSelection.remove();
+         };
 
-       function toNum(low, high, isSigned) {
-         if (isSigned) {
-           return high * 0x100000000 + (low >>> 0);
-         }
+         loading.isShown = function () {
+           return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
+         };
 
-         return (high >>> 0) * 0x100000000 + (low >>> 0);
+         return loading;
        }
 
-       function writeBigVarint(val, pbf) {
-         var low, high;
+       function coreHistory(context) {
+         var dispatch = dispatch$8('reset', 'change', 'merge', 'restore', 'undone', 'redone', 'storage_error');
 
-         if (val >= 0) {
-           low = val % 0x100000000 | 0;
-           high = val / 0x100000000 | 0;
-         } else {
-           low = ~(-val % 0x100000000);
-           high = ~(-val / 0x100000000);
+         var _lock = utilSessionMutex('lock'); // restorable if iD not open in another window/tab and a saved history exists in localStorage
 
-           if (low ^ 0xffffffff) {
-             low = low + 1 | 0;
-           } else {
-             low = 0;
-             high = high + 1 | 0;
+
+         var _hasUnresolvedRestorableChanges = _lock.lock() && !!corePreferences(getKey('saved_history'));
+
+         var duration = 150;
+         var _imageryUsed = [];
+         var _photoOverlaysUsed = [];
+         var _checkpoints = {};
+
+         var _pausedGraph;
+
+         var _stack;
+
+         var _index;
+
+         var _tree; // internal _act, accepts list of actions and eased time
+
+
+         function _act(actions, t) {
+           actions = Array.prototype.slice.call(actions);
+           var annotation;
+
+           if (typeof actions[actions.length - 1] !== 'function') {
+             annotation = actions.pop();
            }
-         }
 
-         if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
-           throw new Error('Given varint doesn\'t fit into 10 bytes');
-         }
+           var graph = _stack[_index].graph;
 
-         pbf.realloc(10);
-         writeBigVarintLow(low, high, pbf);
-         writeBigVarintHigh(high, pbf);
-       }
+           for (var i = 0; i < actions.length; i++) {
+             graph = actions[i](graph, t);
+           }
 
-       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 {
+             graph: graph,
+             annotation: annotation,
+             imageryUsed: _imageryUsed,
+             photoOverlaysUsed: _photoOverlaysUsed,
+             transform: context.projection.transform(),
+             selectedIDs: context.selectedIDs()
+           };
+         } // internal _perform with eased time
 
-       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 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 _perform(args, t) {
+           var previous = _stack[_index].graph;
+           _stack = _stack.slice(0, _index + 1);
 
-         pbf.realloc(extraLen);
+           var actionResult = _act(args, t);
 
-         for (var i = pbf.pos - 1; i >= startPos; i--) {
-           pbf.buf[i + extraLen] = pbf.buf[i];
-         }
-       }
+           _stack.push(actionResult);
 
-       function _writePackedVarint(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeVarint(arr[i]);
-         }
-       }
+           _index++;
+           return change(previous);
+         } // internal _replace with eased time
 
-       function _writePackedSVarint(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeSVarint(arr[i]);
-         }
-       }
 
-       function _writePackedFloat(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeFloat(arr[i]);
-         }
-       }
+         function _replace(args, t) {
+           var previous = _stack[_index].graph; // assert(_index == _stack.length - 1)
 
-       function _writePackedDouble(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeDouble(arr[i]);
-         }
-       }
+           var actionResult = _act(args, t);
 
-       function _writePackedBoolean(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeBoolean(arr[i]);
-         }
-       }
+           _stack[_index] = actionResult;
+           return change(previous);
+         } // internal _overwrite with eased time
 
-       function _writePackedFixed(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeFixed32(arr[i]);
-         }
-       }
 
-       function _writePackedSFixed(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeSFixed32(arr[i]);
-         }
-       }
+         function _overwrite(args, t) {
+           var previous = _stack[_index].graph;
 
-       function _writePackedFixed2(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeFixed64(arr[i]);
-         }
-       }
+           if (_index > 0) {
+             _index--;
 
-       function _writePackedSFixed2(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeSFixed64(arr[i]);
+             _stack.pop();
+           }
+
+           _stack = _stack.slice(0, _index + 1);
+
+           var actionResult = _act(args, t);
+
+           _stack.push(actionResult);
+
+           _index++;
+           return change(previous);
+         } // determine difference and dispatch a change event
+
+
+         function change(previous) {
+           var difference = coreDifference(previous, history.graph());
+
+           if (!_pausedGraph) {
+             dispatch.call('change', this, difference);
+           }
+
+           return difference;
+         } // iD uses namespaced keys so multiple installations do not conflict
+
+
+         function getKey(n) {
+           return 'iD_' + window.location.origin + '_' + n;
          }
-       } // Buffer code below from https://github.com/feross/buffer, MIT-licensed
 
+         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 readUInt32(buf, pos) {
-         return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + buf[pos + 3] * 0x1000000;
-       }
+             _stack[0].graph.rebase(entities, stack, false);
 
-       function writeInt32(buf, val, pos) {
-         buf[pos] = val;
-         buf[pos + 1] = val >>> 8;
-         buf[pos + 2] = val >>> 16;
-         buf[pos + 3] = val >>> 24;
-       }
+             _tree.rebase(entities, false);
 
-       function readInt32(buf, pos) {
-         return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + (buf[pos + 3] << 24);
-       }
+             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];
 
-       function readUtf8(buf, pos, end) {
-         var str = '';
-         var i = pos;
+             if (arguments.length === 1 || arguments.length === 2 && typeof arguments[1] !== 'function') {
+               transitionable = !!action0.transitionable;
+             }
 
-         while (i < end) {
-           var b0 = buf[i];
-           var c = null; // codepoint
+             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;
 
-           var bytesPerSequence = b0 > 0xEF ? 4 : b0 > 0xDF ? 3 : b0 > 0xBF ? 2 : 1;
-           if (i + bytesPerSequence > end) break;
-           var b1, b2, b3;
+             if (isNaN(+n) || +n < 0) {
+               n = 1;
+             }
 
-           if (bytesPerSequence === 1) {
-             if (b0 < 0x80) {
-               c = b0;
+             while (n-- > 0 && _index > 0) {
+               _index--;
+
+               _stack.pop();
              }
-           } else if (bytesPerSequence === 2) {
-             b1 = buf[i + 1];
 
-             if ((b1 & 0xC0) === 0x80) {
-               c = (b0 & 0x1F) << 0x6 | b1 & 0x3F;
+             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;
 
-               if (c <= 0x7F) {
-                 c = null;
-               }
+             while (_index > 0) {
+               _index--;
+               if (_stack[_index].annotation) break;
              }
-           } 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;
+             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;
 
-               if (c <= 0x7FF || c >= 0xD800 && c <= 0xDFFF) {
-                 c = null;
+             while (tryIndex < _stack.length - 1) {
+               tryIndex++;
+
+               if (_stack[tryIndex].annotation) {
+                 _index = tryIndex;
+                 dispatch.call('redone', this, _stack[_index], previousStack);
+                 break;
                }
              }
-           } 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;
+             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 (c <= 0xFFFF || c >= 0x110000) {
-                 c = null;
-               }
+             while (i >= 0) {
+               if (_stack[i].annotation) return _stack[i].annotation;
+               i--;
              }
-           }
+           },
+           redoAnnotation: function redoAnnotation() {
+             var i = _index + 1;
 
-           if (c === null) {
-             c = 0xFFFD;
-             bytesPerSequence = 1;
-           } else if (c > 0xFFFF) {
-             c -= 0x10000;
-             str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
-             c = 0xDC00 | c & 0x3FF;
-           }
+             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);
+             }
+
+             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();
+
+               _stack.slice(1, _index + 1).forEach(function (state) {
+                 state.imageryUsed.forEach(function (source) {
+                   if (source !== 'Custom') {
+                     s.add(source);
+                   }
+                 });
+               });
+
+               return Array.from(s);
+             }
+           },
+           photoOverlaysUsed: function photoOverlaysUsed(sources) {
+             if (sources) {
+               _photoOverlaysUsed = sources;
+               return history;
+             } else {
+               var s = new Set();
+
+               _stack.slice(1, _index + 1).forEach(function (state) {
+                 if (state.photoOverlaysUsed && Array.isArray(state.photoOverlaysUsed)) {
+                   state.photoOverlaysUsed.forEach(function (photoOverlay) {
+                     s.add(photoOverlay);
+                   });
+                 }
+               });
+
+               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 = {};
+             }
+
+             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..
+
+             Object.values(graph.base().entities).forEach(function (entity) {
+               var copy = copyIntroEntity(entity);
+               baseEntities[copy.id] = copy;
+             }); // replace base entities with head entities..
+
+             Object.keys(graph.entities).forEach(function (id) {
+               var entity = graph.entities[id];
+
+               if (entity) {
+                 var copy = copyIntroEntity(entity);
+                 baseEntities[copy.id] = copy;
+               } else {
+                 delete baseEntities[id];
+               }
+             }); // swap temporary for permanent ids..
+
+             Object.values(baseEntities).forEach(function (entity) {
+               if (Array.isArray(entity.nodes)) {
+                 entity.nodes = entity.nodes.map(function (node) {
+                   return permIDs[node] || node;
+                 });
+               }
+
+               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`
+
+               if (copy.tags && !Object.keys(copy.tags)) {
+                 delete copy.tags;
+               }
 
-           str += String.fromCharCode(c);
-           i += bytesPerSequence;
-         }
+               if (Array.isArray(copy.loc)) {
+                 copy.loc[0] = +copy.loc[0].toFixed(6);
+                 copy.loc[1] = +copy.loc[1].toFixed(6);
+               }
 
-         return str;
-       }
+               var match = source.id.match(/([nrw])-\d*/); // temporary id
 
-       function readUtf8TextDecoder(buf, pos, end) {
-         return utf8TextDecoder.decode(buf.subarray(pos, end));
-       }
+               if (match !== null) {
+                 var nrw = match[1];
+                 var permID;
 
-       function writeUtf8(buf, str, pos) {
-         for (var i = 0, c, lead; i < str.length; i++) {
-           c = str.charCodeAt(i); // code point
+                 do {
+                   permID = nrw + ++nextID[nrw];
+                 } while (baseEntities.hasOwnProperty(permID));
 
-           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;
+                 copy.id = permIDs[source.id] = permID;
                }
 
-               continue;
+               return copy;
              }
-           } else if (lead) {
-             buf[pos++] = 0xEF;
-             buf[pos++] = 0xBF;
-             buf[pos++] = 0xBD;
-             lead = null;
-           }
+           },
+           toJSON: function toJSON() {
+             if (!this.hasChanges()) return;
+             var allEntities = {};
+             var baseEntities = {};
+             var base = _stack[0];
 
-           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;
-               }
+             var s = _stack.map(function (i) {
+               var modified = [];
+               var deleted = [];
+               Object.keys(i.graph.entities).forEach(function (id) {
+                 var entity = i.graph.entities[id];
 
-               buf[pos++] = c >> 0x6 & 0x3F | 0x80;
-             }
+                 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.
 
-             buf[pos++] = c & 0x3F | 0x80;
-           }
-         }
 
-         return pos;
-       }
+                 if (id in base.graph.entities) {
+                   baseEntities[id] = base.graph.entities[id];
+                 }
 
-       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 && 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
 
-       function Point(x, y) {
-         this.x = x;
-         this.y = y;
-       }
 
-       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);
-         },
+                 var baseParents = base.graph._parentWays[id];
 
-         /**
-          * 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);
-         },
+                 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;
+             });
 
-         /**
-          * 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);
-         },
+             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;
 
-         /**
-          * 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 (h.version === 2 || h.version === 3) {
+               var allEntities = {};
+               h.entities.forEach(function (entity) {
+                 allEntities[osmEntity.key(entity)] = osmEntity(entity);
+               });
 
-         /**
-          * 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);
-         },
+               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);
+                 });
 
-         /**
-          * 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);
-         },
+                 var stack = _stack.map(function (state) {
+                   return state.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);
-         },
+                 _stack[0].graph.rebase(baseEntities, stack, true);
 
-         /**
-          * 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);
-         },
+                 _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
 
-         /**
-          * 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);
-         },
 
-         /**
-          * 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);
-         },
+                 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);
+                   });
 
-         /**
-          * 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 (missing.length && osm) {
+                     loadComplete = false;
+                     context.map().redrawEnable(false);
+                     var loading = uiLoading(context).blocking(true);
+                     context.container().call(loading);
 
-         /**
-          * 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();
-         },
+                     var childNodesLoaded = function childNodesLoaded(err, result) {
+                       if (!err) {
+                         var visibleGroups = utilArrayGroupBy(result.data, 'visible');
+                         var visibles = visibleGroups["true"] || []; // alive nodes
 
-         /**
-          * 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();
-         },
+                         var invisibles = visibleGroups["false"] || []; // deleted nodes
 
-         /**
-          * 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);
-         },
+                         if (visibles.length) {
+                           var visibleIDs = visibles.map(function (entity) {
+                             return entity.id;
+                           });
 
-         /**
-          * 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;
-         },
+                           var stack = _stack.map(function (state) {
+                             return state.graph;
+                           });
 
-         /**
-          * 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));
-         },
+                           missing = utilArrayDifference(missing, visibleIDs);
 
-         /**
-          * 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;
-         },
+                           _stack[0].graph.rebase(visibles, stack, true);
 
-         /**
-          * 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);
-         },
+                           _tree.rebase(visibles, true);
+                         } // fetch older versions of nodes that were deleted..
 
-         /**
-          * 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);
-         },
 
-         /**
-          * 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);
-         },
+                         invisibles.forEach(function (entity) {
+                           osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
+                         });
+                       }
 
-         /*
-          * 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());
+                       if (err || !missing.length) {
+                         loading.close();
+                         context.map().redrawEnable(true);
+                         dispatch.call('change');
+                         dispatch.call('restore', this);
+                       }
+                     };
 
-           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;
-         }
-       };
-       /**
-        * 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);
-        */
+                     osm.loadMultiple(missing, childNodesLoaded);
+                   }
+                 }
+               }
+
+               _stack = h.stack.map(function (d) {
+                 var entities = {},
+                     entity;
+
+                 if (d.modified) {
+                   d.modified.forEach(function (key) {
+                     entity = allEntities[key];
+                     entities[entity.id] = entity;
+                   });
+                 }
+
+                 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 = {};
 
-       Point.convert = function (a) {
-         if (a instanceof Point) {
-           return a;
-         }
+                 for (var i in d.entities) {
+                   var entity = d.entities[i];
+                   entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
+                 }
 
-         if (Array.isArray(a)) {
-           return new Point(a[0], a[1]);
-         }
+                 d.graph = coreGraph(_stack[0].graph).load(entities);
+                 return d;
+               });
+             }
 
-         return a;
-       };
+             var transform = _stack[_index].transform;
 
-       var vectortilefeature = VectorTileFeature;
+             if (transform) {
+               context.map().transformEase(transform, 0); // 0 = immediate, no easing
+             }
 
-       function VectorTileFeature(pbf, end, extent, keys, values) {
-         // Public
-         this.properties = {};
-         this.extent = extent;
-         this.type = 0; // Private
+             if (loadComplete) {
+               dispatch.call('change');
+               dispatch.call('restore', this);
+             }
 
-         this._pbf = pbf;
-         this._geometry = -1;
-         this._keys = keys;
-         this._values = values;
-         pbf.readFields(readFeature, this, end);
-       }
+             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');
+             }
 
-       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;
-       }
+             return history;
+           },
+           // delete the history version saved in localStorage
+           clearSaved: function clearSaved() {
+             context.debouncedSave.cancel();
 
-       function readTag(pbf, feature) {
-         var end = pbf.readVarint() + pbf.pos;
+             if (_lock.locked()) {
+               _hasUnresolvedRestorableChanges = false;
+               corePreferences(getKey('saved_history'), null); // clear the changeset metadata associated with the saved history
 
-         while (pbf.pos < end) {
-           var key = feature._keys[pbf.readVarint()],
-               value = feature._values[pbf.readVarint()];
+               corePreferences('comment', null);
+               corePreferences('hashtags', null);
+               corePreferences('source', null);
+             }
 
-           feature.properties[key] = value;
-         }
+             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');
        }
 
-       VectorTileFeature.types = ['Unknown', 'Point', 'LineString', 'Polygon'];
-
-       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;
+       /**
+        * Look for roads that can be connected to other roads with a short extension
+        */
 
-         while (pbf.pos < end) {
-           if (length <= 0) {
-             var cmdLen = pbf.readVarint();
-             cmd = cmdLen & 0x7;
-             length = cmdLen >> 3;
-           }
+       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
 
-           length--;
+         var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS; // Comes from considering bounding case of perpendicular ways
 
-           if (cmd === 1 || cmd === 2) {
-             x += pbf.readSVarint();
-             y += pbf.readSVarint();
+         var SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);
 
-             if (cmd === 1) {
-               // moveTo
-               if (line) lines.push(line);
-               line = [];
-             }
+         function isHighway(entity) {
+           return entity.type === 'way' && osmRoutableHighwayTagValues[entity.tags.highway];
+         }
 
-             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);
-           }
+         function isTaggedAsNotContinuing(node) {
+           return node.tags.noexit === 'yes' || node.tags.amenity === 'parking_entrance' || node.tags.entrance && node.tags.entrance !== 'no';
          }
 
-         if (line) lines.push(line);
-         return lines;
-       };
+         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]);
 
-       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;
+                 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;
 
-         while (pbf.pos < end) {
-           if (length <= 0) {
-             var cmdLen = pbf.readVarint();
-             cmd = cmdLen & 0x7;
-             length = cmdLen >> 3;
-           }
+           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');
 
-           length--;
+                 var _this$issue$entityIds = _slicedToArray(this.issue.entityIds, 3),
+                     endNodeId = _this$issue$entityIds[1],
+                     crossWayId = _this$issue$entityIds[2];
 
-           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);
-           }
-         }
+                 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)
 
-         return [x1, y1, x2, y2];
-       };
+                 var nearEndNodes = findNearbyEndNodes(endNode, crossWay);
 
-       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 (nearEndNodes.length > 0) {
+                   var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);
 
-         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];
-           }
-         }
+                   if (collinear) {
+                     context.perform(actionMergeNodes([collinear.id, endNode.id], collinear.loc), annotation);
+                     return;
+                   }
+                 }
 
-         switch (this.type) {
-           case 1:
-             var points = [];
+                 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
 
-             for (i = 0; i < coords.length; i++) {
-               points[i] = coords[i][0];
+                 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 (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'));
+                 }
+               }));
              }
 
-             coords = points;
-             project(coords);
-             break;
+             return fixes;
+           }
 
-           case 2:
-             for (i = 0; i < coords.length; i++) {
-               project(coords[i]);
+           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'));
+           }
+
+           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;
              }
 
-             break;
+             if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
+               return false;
+             }
 
-           case 3:
-             coords = classifyRings(coords);
+             var occurrences = 0;
 
-             for (i = 0; i < coords.length; i++) {
-               for (j = 0; j < coords[i].length; j++) {
-                 project(coords[i][j]);
+             for (var index in way.nodes) {
+               if (way.nodes[index] === node.id) {
+                 occurrences += 1;
+
+                 if (occurrences > 1) {
+                   return false;
+                 }
                }
              }
 
-             break;
-         }
+             return true;
+           }
 
-         if (coords.length === 1) {
-           coords = coords[0];
-         } else {
-           type = 'Multi' + type;
-         }
+           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
 
-         var result = {
-           type: "Feature",
-           geometry: {
-             type: type,
-             coordinates: coords
-           },
-           properties: this.properties
-         };
+               testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc); // don't flag issue if connecting the ways would cause self-intersection
 
-         if ('id' in this) {
-           result.id = this.id;
-         }
+               if (geoHasSelfIntersections(testNodes, nodeID)) return;
+               results.push(connectionInfo);
+             });
+             return results;
+           }
 
-         return result;
-       }; // classifies an array of rings into polygons with outer rings and holes
+           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 classifyRings(rings) {
-         var len = rings.length;
-         if (len <= 1) return [rings];
-         var polygons = [],
-             polygon,
-             ccw;
+             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);
 
-         for (var i = 0; i < len; i++) {
-           var area = signedArea$1(rings[i]);
-           if (area === 0) continue;
-           if (ccw === undefined) ccw = area < 0;
+               if (diff < minAngle) {
+                 joinTo = endNode;
+                 minAngle = diff;
+               }
+             });
+             /* Threshold set by considering right angle triangle
+             based on node joining threshold and extension distance */
 
-           if (ccw === area < 0) {
-             if (polygon) polygons.push(polygon);
-             polygon = [rings[i]];
-           } else {
-             polygon.push(rings[i]);
+             if (minAngle <= SIG_ANGLE_TH) return joinTo;
+             return null;
            }
-         }
 
-         if (polygon) polygons.push(polygon);
-         return polygons;
-       }
+           function hasTag(tags, key) {
+             return tags[key] !== undefined && tags[key] !== 'no';
+           }
 
-       function signedArea$1(ring) {
-         var sum = 0;
+           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
 
-         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 ((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
 
-         return sum;
-       }
+             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 vectortilelayer = VectorTileLayer;
+           function canConnectByExtend(way, endNodeIdx) {
+             var tipNid = way.nodes[endNodeIdx]; // the 'tip' node for extension point
 
-       function VectorTileLayer(pbf, end) {
-         // Public
-         this.version = 1;
-         this.name = null;
-         this.extent = 4096;
-         this.length = 0; // Private
+             var midNid = endNodeIdx === 0 ? way.nodes[1] : way.nodes[way.nodes.length - 2]; // the other node of the edge
 
-         this._pbf = pbf;
-         this._keys = [];
-         this._values = [];
-         this._features = [];
-         pbf.readFields(readLayer, this, end);
-         this.length = this._features.length;
-       }
+             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
 
-       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 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
 
-       function readValueMessage(pbf) {
-         var value = null,
-             end = pbf.readVarint() + pbf.pos;
+             var segmentInfos = tree.waySegments(queryExtent, graph);
 
-         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;
-         }
+             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]);
 
-         return value;
-       } // return feature `i` from this layer as a `VectorTileFeature`
+               if (crossLoc) {
+                 return {
+                   mid: midNode,
+                   node: tipNode,
+                   wid: way2.id,
+                   edge: [nA.id, nB.id],
+                   cross_loc: crossLoc
+                 };
+               }
+             }
 
+             return null;
+           }
+         };
 
-       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];
+         validation.type = type;
+         return validation;
+       }
 
-         var end = this._pbf.readVarint() + this._pbf.pos;
+       function validationCloseNodes(context) {
+         var type = 'close_nodes';
+         var pointThresholdMeters = 0.2;
 
-         return new vectortilefeature(this._pbf, end, this.extent, this._keys, this._values);
-       };
+         var validation = function validation(entity, graph) {
+           if (entity.type === 'node') {
+             return getIssuesForNode(entity);
+           } else if (entity.type === 'way') {
+             return getIssuesForWay(entity);
+           }
 
-       var vectortile = VectorTile;
+           return [];
 
-       function VectorTile(pbf, end) {
-         this.layers = pbf.readFields(readTile, {}, end);
-       }
+           function getIssuesForNode(node) {
+             var parentWays = graph.parentWays(node);
 
-       function readTile(tag, layers, pbf) {
-         if (tag === 3) {
-           var layer = new vectortilelayer(pbf, pbf.readVarint() + pbf.pos);
-           if (layer.length) layers[layer.name] = layer;
-         }
-       }
+             if (parentWays.length) {
+               return getIssuesForVertex(node, parentWays);
+             } else {
+               return getIssuesForDetachedPoint(node);
+             }
+           }
+
+           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);
 
-       var VectorTile$1 = vectortile;
-       var VectorTileFeature$1 = vectortilefeature;
-       var VectorTileLayer$1 = vectortilelayer;
-       var vectorTile = {
-         VectorTile: VectorTile$1,
-         VectorTileFeature: VectorTileFeature$1,
-         VectorTileLayer: VectorTileLayer$1
-       };
+             for (var i in parentRelations) {
+               var relation = parentRelations[i];
+               if (relation.tags.type === 'boundary') return 'boundary';
 
-       var tiler$7 = utilTiler().tileSize(512).margin(1);
-       var dispatch$8 = dispatch('loadedData');
+               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';
+               }
+             }
 
-       var _vtCache;
+             return 'other';
+           }
 
-       function abortRequest$7(controller) {
-         controller.abort();
-       }
+           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
 
-       function vtToGeoJSON(data, tile, mergeCache) {
-         var vectorTile$1 = new vectorTile.VectorTile(new pbf(data));
-         var layers = Object.keys(vectorTile$1.layers);
+             if (hypotenuseMeters < 1.5) return false;
+             return true;
+           }
 
-         if (!Array.isArray(layers)) {
-           layers = [layers];
-         }
+           function getIssuesForWay(way) {
+             if (!shouldCheckWay(way)) return [];
+             var issues = [],
+                 nodes = graph.childNodes(way);
 
-         var features = [];
-         layers.forEach(function (layerID) {
-           var layer = vectorTile$1.layers[layerID];
+             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);
+             }
 
-           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
+             return issues;
+           }
 
-               if (geometry.type === 'Polygon') {
-                 geometry.type = 'MultiPolygon';
-                 geometry.coordinates = [geometry.coordinates];
-               }
+           function getIssuesForVertex(node, parentWays) {
+             var issues = [];
 
-               var isClipped = false; // Clip to tile bounds
+             function checkForCloseness(node1, node2, way) {
+               var issue = getWayIssueIfAny(node1, node2, way);
+               if (issue) issues.push(issue);
+             }
 
-               if (geometry.type === 'MultiPolygon') {
-                 var featureClip = bboxClip(feature, tile.extent.rectangle());
+             for (var i = 0; i < parentWays.length; i++) {
+               var parentWay = parentWays[i];
+               if (!shouldCheckWay(parentWay)) continue;
+               var lastIndex = parentWay.nodes.length - 1;
 
-                 if (!fastDeepEqual(feature.geometry, featureClip.geometry)) {
-                   // feature = featureClip;
-                   isClipped = true;
+               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 (!feature.geometry.coordinates.length) continue; // not actually on this tile
+                 if (j !== lastIndex) {
+                   if (parentWay.nodes[j + 1] === node.id) {
+                     checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);
+                   }
+                 }
+               }
+             }
 
-                 if (!feature.geometry.coordinates[0].length) continue; // not actually on this tile
-               } // Generate some unique IDs and add some metadata
+             return issues;
+           }
 
+           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
 
-               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
+             if (wayType === 'boundary') return 0; // expect some features to be mapped with higher levels of detail
 
-               if (isClipped && geometry.type === 'MultiPolygon') {
-                 var merged = mergeCache[propertyhash];
+             if (wayType === 'indoor') return 0.01;
+             if (wayType === 'building') return 0.05;
+             if (wayType === 'path') return 0.1;
+             return 0.2;
+           }
 
-                 if (merged && merged.length) {
-                   var other = merged[0];
-                   var coords = union(feature.geometry.coordinates, other.geometry.coordinates);
+           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);
 
-                   if (!coords || !coords.length) {
-                     continue; // something failed in martinez union
-                   }
+             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;
 
-                   merged.push(feature);
+               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 j = 0; j < merged.length; j++) {
-                     // all these features get...
-                     merged[j].geometry.coordinates = coords; // same coords
+                 for (var key in zAxisKeys) {
+                   var nodeValue = node.tags[key] || '0';
+                   var nearbyValue = nearby.tags[key] || '0';
 
-                     merged[j].__featurehash__ = featurehash; // same hash, so deduplication works
+                   if (nodeValue !== nearbyValue) {
+                     zAxisDifferentiates = true;
+                     break;
                    }
-                 } else {
-                   mergeCache[propertyhash] = [feature];
                  }
+
+                 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')
+                     })];
+                   }
+                 }));
                }
              }
-           }
-         });
-         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);
-           }
+             return issues;
 
-           source.loaded[tile.id] = [];
-           delete source.inflight[tile.id];
-           return response.arrayBuffer();
-         }).then(function (data) {
-           if (!data) {
-             throw new Error('No Data');
+             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);
+             }
            }
 
-           var z = tile.xyz[2];
+           function getWayIssueIfAny(node1, node2, way) {
+             if (node1.id === node2.id || node1.hasInterestingTags() && node2.hasInterestingTags()) {
+               return null;
+             }
 
-           if (!source.canMerge[z]) {
-             source.canMerge[z] = {}; // initialize mergeCache
+             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;
+             }
+
+             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 showReference(selection) {
+               var referenceText = _t('issues.close_nodes.reference');
+               selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(referenceText);
+             }
            }
+         };
 
-           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];
-         });
+         validation.type = type;
+         return validation;
        }
 
-       var serviceVectorTile = {
-         init: function init() {
-           if (!_vtCache) {
-             this.reset();
-           }
+       function validationCrossingWays(context) {
+         var type = 'crossing_ways'; // returns the way or its parent relation, whichever has a useful feature type
 
-           this.event = utilRebind(this, dispatch$8, 'on');
-         },
-         reset: function reset() {
-           for (var sourceID in _vtCache) {
-             var source = _vtCache[sourceID];
+         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 (source && source.inflight) {
-               Object.values(source.inflight).forEach(abortRequest$7);
+             for (var i = 0; i < parentRels.length; i++) {
+               var rel = parentRels[i];
+
+               if (getFeatureType(rel, graph) !== null) {
+                 return rel;
+               }
              }
            }
 
-           _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 = [];
+           return way;
+         }
 
-           for (var i = 0; i < tiles.length; i++) {
-             var features = source.loaded[tiles[i].id];
-             if (!features || !features.length) continue;
+         function hasTag(tags, key) {
+           return tags[key] !== undefined && tags[key] !== 'no';
+         }
 
-             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
+         function taggedAsIndoor(tags) {
+           return hasTag(tags, 'indoor') || hasTag(tags, 'level') || tags.highway === 'corridor';
+         }
 
-               results.push(Object.assign({}, feature)); // shallow copy
-             }
-           }
+         function allowsBridge(featureType) {
+           return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+         }
 
-           return results;
-         },
-         loadTiles: function loadTiles(sourceID, template, projection) {
-           var source = _vtCache[sourceID];
+         function allowsTunnel(featureType) {
+           return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+         } // discard
 
-           if (!source) {
-             source = this.addSource(sourceID, template);
-           }
 
-           var tiles = tiler$7.getTiles(projection); // abort inflight requests that are no longer needed
+         var ignoredBuildings = {
+           demolished: true,
+           dismantled: true,
+           proposed: true,
+           razed: true
+         };
 
-           Object.keys(source.inflight).forEach(function (k) {
-             var wanted = tiles.find(function (tile) {
-               return k === tile.id;
-             });
+         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 (!wanted) {
-               abortRequest$7(source.inflight[k]);
-               delete source.inflight[k];
-             }
-           });
-           tiles.forEach(function (tile) {
-             loadTile(source, tile);
-           });
-         },
-         cache: function cache() {
-           return _vtCache;
+           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;
          }
-       };
 
-       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;
-           }
+         function isLegitCrossing(tags1, featureType1, tags2, featureType2) {
+           // assume 0 by default
+           var level1 = tags1.level || '0';
+           var level2 = tags2.level || '0';
 
-           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: '*'
-           });
-           d3_json(url).then(function (result) {
-             if (result && result.error) {
-               throw new Error(result.error);
-             }
+           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
 
-             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: '*'
-           });
-           d3_json(url).then(function (result) {
-             if (result && result.error) {
-               throw new Error(result.error);
-             }
+           var layer1 = tags1.layer || '0';
+           var layer2 = tags2.layer || '0';
 
-             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 (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
 
-           if (_wikidataCache[qid]) {
-             if (callback) callback(null, _wikidataCache[qid]);
-             return;
-           }
+             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;
 
-           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: '*'
-           });
-           d3_json(url).then(function (result) {
-             if (result && result.error) {
-               throw new Error(result.error);
-             }
+           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
 
-             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;
-             }
+             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 (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') return true;
+           if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') return true;
+
+           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 i;
-             var description;
 
-             for (i in langs) {
-               var code = langs[i];
+         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
+         };
 
-               if (entity.descriptions[code] && entity.descriptions[code].language === code) {
-                 description = entity.descriptions[code];
-                 break;
-               }
-             }
+         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 (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
+           if (featureType1 === featureType2) {
+             if (featureType1 === 'highway') {
+               var entity1IsPath = osmPathHighwayTagValues[entity1.tags.highway];
+               var entity2IsPath = osmPathHighwayTagValues[entity2.tags.highway];
 
-             var result = {
-               title: entity.id,
-               description: description ? description.value : '',
-               descriptionLocaleCode: description ? description.language : '',
-               editURL: 'https://www.wikidata.org/wiki/' + entity.id
-             }; // add image
+               if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
+                 // one feature is a path but not both
+                 var roadFeature = entity1IsPath ? entity2 : entity1;
 
-             if (entity.claims) {
-               var imageroot = 'https://commons.wikimedia.org/w/index.php';
-               var props = ['P154', 'P18']; // logo image, image
+                 if (nonCrossingHighways[roadFeature.tags.highway]) {
+                   // don't mark path connections with certain roads as crossings
+                   return {};
+                 }
 
-               var prop, image;
+                 var pathFeature = entity1IsPath ? entity1 : entity2;
 
-               for (i = 0; i < props.length; i++) {
-                 prop = entity.claims[props[i]];
+                 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
 
-                 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;
-                   }
-                 }
+                 return bothLines ? {
+                   highway: 'crossing'
+                 } : {};
                }
+
+               return {};
              }
 
-             if (entity.sitelinks) {
-               var englishLocale = _mainLocalizer.languageCode().toLowerCase() === 'en'; // must be one of these that we requested..
+             if (featureType1 === 'waterway') return {};
+             if (featureType1 === 'railway') return {};
+           } else {
+             var featureTypes = [featureType1, featureType2];
 
-               for (i = 0; i < langs.length; i++) {
-                 // check each, in order of preference
-                 var w = langs[i] + 'wiki';
+             if (featureTypes.indexOf('highway') !== -1) {
+               if (featureTypes.indexOf('railway') !== -1) {
+                 if (!bothLines) return {};
+                 var isTram = entity1.tags.railway === 'tram' || entity2.tags.railway === 'tram';
 
-                 if (entity.sitelinks[w]) {
-                   var title = entity.sitelinks[w].title;
-                   var tKey = 'inspector.wiki_reference';
+                 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
 
-                   if (!englishLocale && langs[i] === 'en') {
-                     // user's locale isn't English but
-                     tKey = 'inspector.wiki_en_reference'; // we are sending them to enwiki anyway..
-                   }
+                   return {
+                     railway: 'crossing'
+                   };
+                 } else {
+                   // path-tram connections use this tag
+                   if (isTram) return {
+                     railway: 'tram_level_crossing'
+                   }; // other road-rail connections use this tag
 
-                   result.wiki = {
-                     title: title,
-                     text: tKey,
-                     url: 'https://' + langs[i] + '.wikipedia.org/wiki/' + title.replace(/ /g, '_')
+                   return {
+                     railway: 'level_crossing'
                    };
-                   break;
                  }
                }
+
+               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;
+                 }
+
+                 return bothLines ? {
+                   ford: 'yes'
+                 } : {};
+               }
              }
+           }
 
-             callback(null, result);
-           });
+           return null;
          }
-       };
 
-       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;
-           }
+         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
 
-           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');
-             }
+           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 = {};
 
-             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;
-           }
+           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
 
-           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');
-             }
+             segmentInfos = tree.waySegments(extent, graph);
 
-             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');
-             return;
-           }
+             for (j = 0; j < segmentInfos.length; j++) {
+               segment2Info = segmentInfos[j]; // don't check for self-intersection in this validation
 
-           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');
-             }
+               if (segment2Info.wayId === way1.id) continue; // skip if this way was already checked and only one issue is needed
 
-             if (callback) {
-               var list = result.query.pages[Object.keys(result.query.pages)[0]];
-               var translations = {};
+               if (checkedSingleCrossingWays[segment2Info.wayId]) continue; // mark this way as checked even if there are no crossings
 
-               if (list && list.langlinks) {
-                 list.langlinks.forEach(function (d) {
-                   translations[d.lang] = d['*'];
-                 });
-               }
+               comparedWays[segment2Info.wayId] = true;
+               way2 = graph.hasEntity(segment2Info.wayId);
+               if (!way2) continue;
+               taggedFeature2 = getFeatureWithFeatureTypeTagsForWay(way2, graph); // only check crossing highway, waterway, building, and railway
 
-               callback(null, translations);
-             }
-           })["catch"](function (err) {
-             if (callback) callback(err.message);
-           });
-         }
-       };
+               way2FeatureType = getFeatureType(taggedFeature2, graph);
 
-       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
-       };
+               if (way2FeatureType === null || isLegitCrossing(taggedFeature1.tags, way1FeatureType, taggedFeature2.tags, way2FeatureType)) {
+                 continue;
+               } // create only one issue for building crossings
 
-       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);
-         };
-       }
 
-       function uiNoteComments() {
-         var _note;
+               oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
+               nAId = segment2Info.nodes[0];
+               nBId = segment2Info.nodes[1];
 
-         function noteComments(selection) {
-           if (_note.isNew()) return; // don't draw .comments-container
+               if (nAId === n1.id || nAId === n2.id || nBId === n1.id || nBId === n2.id) {
+                 // n1 or n2 is a connection node; skip
+                 continue;
+               }
 
-           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;
+               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 (osm && d.user) {
-               selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.user)).attr('target', '_blank');
+               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;
+                 }
+               }
              }
+           }
 
-             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);
+           return edgeCrossInfos;
          }
 
-         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
+         function waysToCheck(entity, graph) {
+           var featureType = getFeatureType(entity, graph);
+           if (!featureType) return [];
 
-           _note.comments.forEach(function (d) {
-             if (d.uid) uids[d.uid] = true;
-           });
+           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
 
-           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);
-             });
-           });
-         }
+                 if (entity && array.indexOf(entity) === -1) {
+                   array.push(entity);
+                 }
+               }
 
-         function localeDateString(s) {
-           if (!s) return null;
-           var options = {
-             day: 'numeric',
-             month: 'short',
-             year: 'numeric'
-           };
-           s = s.replace(/-/g, '/'); // fix browser-specific Date() issues
+               return array;
+             }, []);
+           }
 
-           var d = new Date(s);
-           if (isNaN(d.getTime())) return null;
-           return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+           return [];
          }
 
-         noteComments.note = function (val) {
-           if (!arguments.length) return _note;
-           _note = val;
-           return noteComments;
-         };
+         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
 
-         return noteComments;
-       }
+           var wayIndex, crossingIndex, crossings;
 
-       function uiNoteHeader() {
-         var _note;
+           for (wayIndex in ways) {
+             crossings = findCrossingsByWay(ways[wayIndex], graph, tree);
 
-         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');
+             for (crossingIndex in crossings) {
+               issues.push(createIssue(crossings[crossingIndex], graph));
              }
+           }
 
-             return _t('note.note') + ' ' + d.id + ' ' + (d.status === 'closed' ? _t('note.closed') : '');
-           });
-         }
-
-         noteHeader.note = function (val) {
-           if (!arguments.length) return _note;
-           _note = val;
-           return noteHeader;
+           return issues;
          };
 
-         return noteHeader;
-       }
+         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;
 
-       function uiNoteReport() {
-         var _note;
+             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 noteReport(selection) {
-           var url;
+             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 (services.osm && _note instanceof osmNote && !_note.isNew()) {
-             url = services.osm.noteReportURL(_note);
+           if (isCrossingIndoors) {
+             crossingTypeID = 'indoor-indoor';
+           } else if (isCrossingTunnels) {
+             crossingTypeID = 'tunnel-tunnel';
+           } else if (isCrossingBridges) {
+             crossingTypeID = 'bridge-bridge';
            }
 
-           var link = selection.selectAll('.note-report').data(url ? [url] : []); // exit
-
-           link.exit().remove(); // enter
+           if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
+             crossingTypeID += '_connectable';
+           } // Differentiate based on the loc rounded to 4 digits, since two ways can cross multiple times.
 
-           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'));
-         }
 
-         noteReport.note = function (val) {
-           if (!arguments.length) return _note;
-           _note = val;
-           return noteReport;
-         };
+           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 = [];
 
-         return noteReport;
-       }
+               if (connectionTags) {
+                 fixes.push(makeConnectWaysFix(this.data.connectionTags));
+               }
 
-       function uiViewOnOSM(context) {
-         var _what; // an osmEntity or osmNote
+               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
 
 
-         function viewOnOSM(selection) {
-           var url;
+                 var skipTunnelFix = otherFeatureType === 'waterway' && selectedFeatureType !== 'waterway';
 
-           if (_what instanceof osmEntity) {
-             url = context.connection().entityURL(_what);
-           } else if (_what instanceof osmNote) {
-             url = context.connection().noteURL(_what);
-           }
+                 if (allowsTunnel(selectedFeatureType) && !skipTunnelFix) {
+                   fixes.push(makeAddBridgeOrTunnelFix('add_a_tunnel', 'temaki-tunnel', 'tunnel'));
+                 }
+               } // repositioning the features is always an option
 
-           var data = !_what || _what.isNew() ? [] : [_what];
-           var link = selection.selectAll('.view-on-osm').data(data, function (d) {
-             return d.id;
-           }); // exit
 
-           link.exit().remove(); // enter
+               fixes.push(new validationIssueFix({
+                 icon: 'iD-operation-move',
+                 title: _t.html('issues.fix.reposition_features.title')
+               }));
+               return fixes;
+             }
+           });
 
-           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 showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.crossing_ways.' + crossingTypeID + '.reference'));
+           }
          }
 
-         viewOnOSM.what = function (_) {
-           if (!arguments.length) return _what;
-           _what = _;
-           return viewOnOSM;
-         };
+         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;
 
-         return viewOnOSM;
-       }
+               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 uiNoteEditor(context) {
-         var dispatch$1 = dispatch('change');
-         var noteComments = uiNoteComments();
-         var noteHeader = uiNoteHeader(); // var formFields = uiFormFields(context);
+               var crossingLoc = this.issue.loc;
+               var projection = context.projection;
 
-         var _note;
+               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
 
-         var _newNote; // var _fieldsArr;
+                 var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);
 
+                 if (!structLengthMeters) {
+                   // if no explicit width is set, approximate the width based on the tags
+                   structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
+                 }
 
-         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
+                 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;
+                 }
 
-           var osm = services.osm;
+                 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
 
-           if (osm) {
-             osm.on('change.note-save', function () {
-               selection.call(noteEditor);
-             });
-           }
-         }
+                 structLengthMeters = structLengthMeters / 2 / Math.sin(crossingAngle) * 2; // add padding since the structure must extend past the edges of the crossed feature
 
-         function noteSaveSection(selection) {
-           var isSelected = _note && _note.id === context.selectedNoteID();
+                 structLengthMeters += 4; // clamp the length to a reasonable range
 
-           var noteSave = selection.selectAll('.note-save').data(isSelected ? [_note] : [], function (d) {
-             return d.status + d.id;
-           }); // exit
+                 structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);
 
-           noteSave.exit().remove(); // enter
+                 function geomToProj(geoPoint) {
+                   return [geoLonToMeters(geoPoint[0], geoPoint[1]), geoLatToMeters(geoPoint[1])];
+                 }
 
-           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);
-           // }
+                 function projToGeom(projPoint) {
+                   var lat = geoMetersToLat(projPoint[1]);
+                   return [geoMetersToLon(projPoint[0], lat), lat];
+                 }
 
-           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);
+                 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 (!commentTextarea.empty() && _newNote) {
-             // autofocus the comment field for new notes
-             commentTextarea.node().focus();
-           } // update
+                 function locSphericalDistanceFromCrossingLoc(angle, distanceMeters) {
+                   var lengthSphericalMeters = distanceMeters * linearToSphericalMetersRatio;
+                   return projToGeom([projectedCrossingLoc[0] + Math.cos(angle) * lengthSphericalMeters, projectedCrossingLoc[1] + Math.sin(angle) * lengthSphericalMeters]);
+                 }
 
+                 var endpointLocGetter1 = function endpointLocGetter1(lengthMeters) {
+                   return locSphericalDistanceFromCrossingLoc(projectedAngle, lengthMeters);
+                 };
 
-           noteSave = noteSaveEnter.merge(noteSave).call(userDetails).call(noteSaveButtons); // fast submit if user presses cmd+enter
+                 var endpointLocGetter2 = function endpointLocGetter2(lengthMeters) {
+                   return locSphericalDistanceFromCrossingLoc(projectedAngle + Math.PI, lengthMeters);
+                 }; // avoid creating very short edges from splitting too close to another node
 
-           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
 
-             window.setTimeout(function () {
-               if (_note.isNew()) {
-                 noteSave.selectAll('.save-button').node().focus();
-                 clickSave();
-               } else {
-                 noteSave.selectAll('.comment-button').node().focus();
-                 clickComment();
-               }
-             }, 10);
-           }
+                 var minEdgeLengthMeters = 0.55; // decide where to bound the structure along the way, splitting as necessary
 
-           function changeInput() {
-             var input = select(this);
-             var val = input.property('value').trim() || undefined; // store the unsaved comment with the note itself
+                 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
 
-             _note = _note.update({
-               newComment: val
-             });
-             var osm = services.osm;
+                   var crossingToEdgeEndDistance = geoSphericalDistance(crossingLoc, endNode.loc);
 
-             if (osm) {
-               osm.replaceNote(_note); // update note cache
-             }
+                   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;
+                           }
+                         }
+                       });
+                     });
 
-             noteSave.call(noteSaveButtons);
-           }
-         }
+                     if (edgeCount >= 3) {
+                       // the end node is a junction, try to leave a segment
+                       // between it and the structure - #7202
+                       var insetLength = crossingToEdgeEndDistance - minEdgeLengthMeters;
 
-         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
+                       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
 
-           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'));
 
-             if (user.image_url) {
-               userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
-             }
+                   if (!newNode) newNode = endNode;
+                   var splitAction = actionSplit([newNode.id]).limitWays(resultWayIDs); // only split selected or created ways
+                   // do the split
 
-             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()
-             }));
-           });
-         }
+                   graph = splitAction(graph);
 
-         function noteSaveButtons(selection) {
-           var osm = services.osm;
-           var hasAuth = osm && osm.authenticated();
+                   if (splitAction.getCreatedWayIDs().length) {
+                     resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
+                   }
 
-           var isSelected = _note && _note.id === context.selectedNoteID();
+                   return newNode;
+                 }
 
-           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_note] : [], function (d) {
-             return d.status + d.id;
-           }); // exit
+                 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
 
-           buttonSection.exit().remove(); // enter
+                 if (bridgeOrTunnel === 'bridge') {
+                   tags.bridge = 'yes';
+                   tags.layer = '1';
+                 } else {
+                   var tunnelValue = 'yes';
 
-           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+                   if (getFeatureType(structureWay, graph) === 'waterway') {
+                     // use `tunnel=culvert` for waterways by default
+                     tunnelValue = 'culvert';
+                   }
 
-           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
+                   tags.tunnel = tunnelValue;
+                   tags.layer = '-1';
+                 } // apply the structure tags to the way
 
 
-           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);
+                 graph = actionChangeTags(structureWay.id, tags)(graph);
+                 return graph;
+               };
 
-           function isSaveDisabled(d) {
-             return hasAuth && d.status === 'open' && d.newComment ? null : true;
-           }
+               context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
+               context.enter(modeSelect(context, resultWayIDs));
+             }
+           });
          }
 
-         function clickCancel(d3_event, d) {
-           this.blur(); // avoid keeping focus on the button - #4641
-
-           var osm = services.osm;
+         function makeConnectWaysFix(connectionTags) {
+           var fixTitleID = 'connect_features';
 
-           if (osm) {
-             osm.removeNote(d);
+           if (connectionTags.ford) {
+             fixTitleID = 'connect_using_ford';
            }
 
-           context.enter(modeBrowse(context));
-           dispatch$1.call('change');
-         }
+           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
 
-         function clickSave(d3_event, d) {
-           this.blur(); // avoid keeping focus on the button - #4641
+                   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);
+                   }
+                 });
 
-           var osm = services.osm;
+                 if (nodesToMerge.length > 1) {
+                   // if we're using nearby nodes, merge them with the new node
+                   graph = actionMergeNodes(nodesToMerge, loc)(graph);
+                 }
 
-           if (osm) {
-             osm.postNoteCreate(d, function (err, note) {
-               dispatch$1.call('change', note);
-             });
-           }
+                 return graph;
+               }, _t('issues.fix.connect_crossing_features.annotation'));
+             }
+           });
          }
 
-         function clickStatus(d3_event, d) {
-           this.blur(); // avoid keeping focus on the button - #4641
-
-           var osm = services.osm;
-
-           if (osm) {
-             var setStatus = d.status === 'open' ? 'closed' : 'open';
-             osm.postNoteUpdate(d, setStatus, function (err, note) {
-               dispatch$1.call('change', note);
-             });
-           }
-         }
+         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 clickComment(d3_event, d) {
-           this.blur(); // avoid keeping focus on the button - #4641
+               var layer = tags.layer && Number(tags.layer);
 
-           var osm = services.osm;
+               if (layer && !isNaN(layer)) {
+                 if (higherOrLower === 'higher') {
+                   layer += 1;
+                 } else {
+                   layer -= 1;
+                 }
+               } else {
+                 if (higherOrLower === 'higher') {
+                   layer = 1;
+                 } else {
+                   layer = -1;
+                 }
+               }
 
-           if (osm) {
-             osm.postNoteUpdate(d, d.status, function (err, note) {
-               dispatch$1.call('change', note);
-             });
-           }
+               tags.layer = layer.toString();
+               context.perform(actionChangeTags(entity.id, tags), _t('operations.change_tags.annotation'));
+             }
+           });
          }
 
-         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;
-         };
-
-         return utilRebind(noteEditor, dispatch$1, 'on');
+         validation.type = type;
+         return validation;
        }
 
-       function modeSelectNote(context, selectedNoteID) {
-         var mode = {
-           id: 'select-note',
-           button: 'browse'
-         };
-
-         var _keybinding = utilKeybinding('select-note');
-
-         var _noteEditor = uiNoteEditor(context).on('change', function () {
-           context.map().pan([0, 0]); // trigger a redraw
+       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.
 
-           var note = checkSelectedID();
-           if (!note) return;
-           context.ui().sidebar.show(_noteEditor.note(note));
-         });
+         var _nodeIndex;
 
-         var _behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
-         var _newFeature = false;
+         var _origWay;
 
-         function checkSelectedID() {
-           if (!services.osm) return;
-           var note = services.osm.getNote(selectedNoteID);
+         var _wayGeometry;
 
-           if (!note) {
-             context.enter(modeBrowse(context));
-           }
+         var _headNodeID;
 
-           return note;
-         } // class the note as selected, or return to browse mode if the note is gone
+         var _annotation;
 
+         var _pointerHasMoved = false; // The osmNode to be placed.
+         // This is temporary and just follows the mouse cursor until an "add" event occurs.
 
-         function selectNote(d3_event, drawn) {
-           if (!checkSelectedID()) return;
-           var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);
+         var _drawNode;
 
-           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 _didResolveTempEdit = false;
 
-             if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-               context.enter(modeBrowse(context));
-             }
-           } else {
-             selection.classed('selected', true);
-             context.selectedNoteID(selectedNoteID);
-           }
+         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();
          }
 
-         function esc() {
-           if (context.container().select('.combobox').size()) return;
-           context.enter(modeBrowse(context));
+         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();
          }
 
-         mode.zoomToSelected = function () {
-           if (!services.osm) return;
-           var note = services.osm.getNote(selectedNoteID);
+         function keydown(d3_event) {
+           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             if (context.surface().classed('nope')) {
+               context.surface().classed('nope-suppressed', true);
+             }
 
-           if (note) {
-             context.map().centerZoomEase(note.loc, 20);
+             context.surface().classed('nope', false).classed('nope-disabled', true);
            }
-         };
+         }
 
-         mode.newFeature = function (val) {
-           if (!arguments.length) return _newFeature;
-           _newFeature = val;
-           return mode;
-         };
+         function keyup(d3_event) {
+           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             if (context.surface().classed('nope-suppressed')) {
+               context.surface().classed('nope', true);
+             }
 
-         mode.enter = function () {
-           var note = checkSelectedID();
-           if (!note) return;
+             context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
+           }
+         }
 
-           _behaviors.forEach(context.install);
+         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()`
 
-           _keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
 
-           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
+         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;
 
-           sidebar.expand(sidebar.intersects(note.extent()));
-           context.map().on('drawn.select', selectNote);
-         };
+           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);
 
-         mode.exit = function () {
-           _behaviors.forEach(context.uninstall);
+             if (choice) {
+               loc = choice.loc;
+             }
+           }
 
-           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);
-         };
+           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
 
-         return mode;
-       }
 
-       function modeDragNote(context) {
-         var mode = {
-           id: 'drag-note',
-           button: 'browse'
-         };
-         var edit = behaviorEdit(context);
+         function checkGeometry(includeDrawNode) {
+           var nopeDisabled = context.surface().classed('nope-disabled');
+           var isInvalid = isInvalidGeometry(includeDrawNode);
 
-         var _nudgeInterval;
+           if (nopeDisabled) {
+             context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
+           } else {
+             context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
+           }
+         }
 
-         var _lastLoc;
+         function isInvalidGeometry(includeDrawNode) {
+           var testNode = _drawNode; // we only need to test the single way we're drawing
 
-         var _note; // most current note.. dragged note may have stale datum.
+           var parentWay = context.graph().entity(wayID);
+           var nodes = context.graph().childNodes(parentWay).slice(); // shallow copy
 
+           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;
+             }
+           }
 
-         function startNudge(d3_event, nudge) {
-           if (_nudgeInterval) window.clearInterval(_nudgeInterval);
-           _nudgeInterval = window.setInterval(function () {
-             context.map().pan(nudge);
-             doMove(d3_event, nudge);
-           }, 50);
+           return testNode && geoHasSelfIntersections(nodes, testNode.id);
          }
 
-         function stopNudge() {
-           if (_nudgeInterval) {
-             window.clearInterval(_nudgeInterval);
-             _nudgeInterval = null;
-           }
-         }
+         function undone() {
+           // undoing removed the temp edit
+           _didResolveTempEdit = true;
+           context.pauseChangeDispatch();
+           var nextMode;
 
-         function origin(note) {
-           return context.projection(note.loc);
-         }
+           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
 
-         function start(d3_event, note) {
-           _note = note;
-           var osm = services.osm;
+             nextMode = mode;
+           } // clear the redo stack by adding and removing a blank edit
 
-           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);
-           }
 
-           context.surface().selectAll('.note-' + _note.id).classed('active', true);
            context.perform(actionNoop());
-           context.enter(mode);
-           context.selectedNoteID(_note.id);
+           context.pop(1);
+           context.resumeChangeDispatch();
+           context.enter(nextMode);
          }
 
-         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 setActiveElements() {
+           if (!_drawNode) return;
+           context.surface().selectAll('.' + _drawNode.id).classed('active', true);
+         }
 
-           if (nudge) {
-             startNudge(d3_event, nudge);
-           } else {
-             stopNudge();
+         function resetToStartGraph() {
+           while (context.graph() !== startGraph) {
+             context.pop();
            }
          }
 
-         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;
+         var drawWay = function drawWay(surface) {
+           _drawNode = undefined;
+           _didResolveTempEdit = false;
+           _origWay = context.entity(wayID);
 
-           if (osm) {
-             osm.replaceNote(_note); // update note cache
+           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];
            }
 
-           context.replace(actionNoop()); // trigger redraw
-         }
-
-         function end() {
-           context.replace(actionNoop()); // trigger redraw
+           _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.
 
-           context.selectedNoteID(_note.id).enter(modeSelectNote(context, _note.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 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);
+         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();
+           }
 
-         mode.enter = function () {
-           context.install(edit);
+           _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);
          };
 
-         mode.exit = function () {
-           context.ui().sidebar.hover.cancel();
-           context.uninstall(edit);
-           context.surface().selectAll('.active').classed('active', false);
-           stopNudge();
-         };
+         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);
+           }
 
-         mode.behavior = drag;
-         return mode;
-       }
+           checkGeometry(true
+           /* includeDrawNode */
+           );
 
-       function uiDataHeader() {
-         var _datum;
+           if (d && d.properties && d.properties.nope || context.surface().classed('nope')) {
+             if (!_pointerHasMoved) {
+               // prevent the temporary draw node from appearing on touch devices
+               removeDrawNode();
+             }
 
-         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'));
-         }
+             dispatch.call('rejectedSelfIntersection', this);
+             return; // can't click here
+           }
 
-         dataHeader.datum = function (val) {
-           if (!arguments.length) return _datum;
-           _datum = val;
-           return this;
-         };
+           context.pauseChangeDispatch();
+           doAdd(); // we just replaced the temporary edit with the real one
 
-         return dataHeader;
-       }
+           _didResolveTempEdit = true;
+           context.resumeChangeDispatch();
+           context.enter(mode);
+         } // Accept the current position of the drawing node
 
-       // 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;
+         drawWay.add = function (loc, d) {
+           attemptAdd(d, loc, function () {// don't need to do anything extra
+           });
+         }; // Connect the way to an existing way
 
-       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;
 
-         var _mouseEnterHandler, _mouseLeaveHandler;
+         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
 
-         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 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
+         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;
+           }
 
-               input.node().focus(); // focus the input as if it was clicked
+           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);
+           });
+         };
+         /**
+          * @param {(typeof osmWay)[]} ways
+          * @returns {"line" | "area" | "generic"}
+          */
 
-               mousedown(d3_event);
-             }).on('mouseup.combo-caret', function (d3_event) {
-               d3_event.preventDefault(); // don't steal focus from input
 
-               mouseup(d3_event);
-             });
-           });
+         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 */
 
-           function mousedown(d3_event) {
-             if (d3_event.button !== 0) return; // left click only
 
-             _tDown = +new Date(); // clear selection
+         function followMode() {
+           if (_didResolveTempEdit) return;
 
-             var start = input.property('selectionStart');
-             var end = input.property('selectionEnd');
+           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];
 
-             if (start !== end) {
-               var val = utilGetSetValue(input);
-               input.node().setSelectionRange(val.length, val.length);
-               return;
-             }
+             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
 
-             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
+             var historyGraph = context.history().graph();
 
-             if (input.node() !== document.activeElement) return; // exit if this input is not focused
+             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.
 
-             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 combo = container.selectAll('.combobox');
+             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 (combo.empty() || combo.datum() !== input.node()) {
-               var tOrig = _tDown;
-               window.setTimeout(function () {
-                 if (tOrig !== _tDown) return; // exit if user double clicked
+             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.
 
-                 fetchComboData('', function () {
-                   show();
-                   render();
-                 });
-               }, 250);
-             } else {
-               hide();
-             }
-           }
 
-           function focus() {
-             fetchComboData(''); // prefetch values (may warm taginfo cache)
-           }
+             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;
+             }
 
-           function blur() {
-             _comboHideTimerID = window.setTimeout(hide, 75);
-           }
+             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
 
-           function show() {
-             hide(); // remove any existing
+             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
 
-             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();
+             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
+               }
              });
-             container.on('scroll.combo-scroll', render, true);
+           } catch (ex) {
+             context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t.html('operations.follow.error.unknown'))();
            }
+         }
 
-           function hide() {
-             if (_comboHideTimerID) {
-               window.clearTimeout(_comboHideTimerID);
-               _comboHideTimerID = undefined;
-             }
+         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.
 
-             container.selectAll('.combobox').remove();
-             container.on('scroll.combo-scroll', null);
-           }
+         drawWay.finish = function () {
+           checkGeometry(false
+           /* includeDrawNode */
+           );
 
-           function keydown(d3_event) {
-             var shown = !container.selectAll('.combobox').empty();
-             var tagName = input.node() ? input.node().tagName.toLowerCase() : '';
+           if (context.surface().classed('nope')) {
+             dispatch.call('rejectedSelfIntersection', this);
+             return; // can't click here
+           }
 
-             switch (d3_event.keyCode) {
-               case 8: // ⌫ Backspace
+           context.pauseChangeDispatch(); // remove the temporary edit
 
-               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;
+           context.pop(1);
+           _didResolveTempEdit = true;
+           context.resumeChangeDispatch();
+           var way = context.hasEntity(wayID);
 
-               case 9:
-                 // ⇥ Tab
-                 accept();
-                 break;
+           if (!way || way.isDegenerate()) {
+             drawWay.cancel();
+             return;
+           }
 
-               case 13:
-                 // ↩ Return
-                 d3_event.preventDefault();
-                 d3_event.stopPropagation();
-                 break;
+           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.
 
-               case 38:
-                 // ↑ Up arrow
-                 if (tagName === 'textarea' && !shown) return;
-                 d3_event.preventDefault();
 
-                 if (tagName === 'input' && !shown) {
-                   show();
-                 }
+         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));
+         };
 
-                 nav(-1);
-                 break;
+         drawWay.nodeIndex = function (val) {
+           if (!arguments.length) return _nodeIndex;
+           _nodeIndex = val;
+           return drawWay;
+         };
 
-               case 40:
-                 // ↓ Down arrow
-                 if (tagName === 'textarea' && !shown) return;
-                 d3_event.preventDefault();
+         drawWay.activeID = function () {
+           if (!arguments.length) return _drawNode && _drawNode.id; // no assign
 
-                 if (tagName === 'input' && !shown) {
-                   show();
-                 }
+           return drawWay;
+         };
 
-                 nav(+1);
-                 break;
-             }
-           }
+         return utilRebind(drawWay, dispatch, 'on');
+       }
 
-           function keyup(d3_event) {
-             switch (d3_event.keyCode) {
-               case 27:
-                 // ⎋ Escape
-                 cancel();
-                 break;
+       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;
 
-               case 13:
-                 // ↩ Return
-                 accept();
-                 break;
-             }
-           } // Called whenever the input value is changed (e.g. on typing)
+         mode.enter = function () {
+           behavior.nodeIndex(affix === 'prefix' ? 0 : undefined);
+           context.install(behavior);
+         };
 
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };
 
-           function change() {
-             fetchComboData(value(), function () {
-               _selected = null;
-               var val = input.property('value');
+         mode.selectedIDs = function () {
+           return [wayID];
+         };
 
-               if (_suggestions.length) {
-                 if (input.property('selectionEnd') === val.length) {
-                   _selected = tryAutocomplete();
-                 }
+         mode.activeID = function () {
+           return behavior && behavior.activeID() || [];
+         };
 
-                 if (!_selected) {
-                   _selected = val;
-                 }
-               }
+         return mode;
+       }
 
-               if (val.length) {
-                 var combo = container.selectAll('.combobox');
+       function validationDisconnectedWay() {
+         var type = 'disconnected_way';
 
-                 if (combo.empty()) {
-                   show();
-                 }
-               } else {
-                 hide();
-               }
+         function isTaggedAsHighway(entity) {
+           return osmRoutableHighwayTagValues[entity.tags.highway];
+         }
 
-               render();
-             });
-           } // Called when the user presses up/down arrows to navigate the list
+         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 makeFixes(context) {
+             var fixes = [];
+             var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);
 
-           function nav(dir) {
-             if (_suggestions.length) {
-               // try to determine previously selected index..
-               var index = -1;
+             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);
+               }
 
-               for (var i = 0; i < _suggestions.length; i++) {
-                 if (_selected && _suggestions[i].value === _selected) {
-                   index = i;
-                   break;
-                 }
-               } // pick new _selected
+               if (!fixes.length) {
+                 fixes.push(new validationIssueFix({
+                   title: _t.html('issues.fix.connect_feature.title')
+                 }));
+               }
 
+               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]);
 
-               index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
-               _selected = _suggestions[index].value;
-               input.property('value', _selected);
+                   if (!operation.disabled()) {
+                     operation();
+                   }
+                 }
+               }));
+             } else {
+               fixes.push(new validationIssueFix({
+                 title: _t.html('issues.fix.connect_features.title')
+               }));
              }
 
-             render();
-             ensureVisible();
+             return fixes;
            }
 
-           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
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.disconnected_way.routable.reference'));
+           }
 
+           function routingIslandForEntity(entity) {
+             var routingIsland = new Set(); // the interconnected routable features
 
-             var selected = combo.selectAll('.combobox-option.selected').node();
+             var waysToCheck = []; // the queue of remaining routable ways to traverse
 
-             if (selected) {
-               selected.scrollIntoView({
-                 behavior: 'smooth',
-                 block: 'nearest'
+             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);
+                 }
                });
              }
-           }
-
-           function value() {
-             var value = input.property('value');
-             var start = input.property('selectionStart');
-             var end = input.property('selectionEnd');
 
-             if (start && end) {
-               value = value.substring(0, start);
+             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;
              }
 
-             return value;
-           }
+             while (waysToCheck.length) {
+               var wayToCheck = waysToCheck.pop();
+               var childNodes = graph.childNodes(wayToCheck);
 
-           function fetchComboData(v, cb) {
-             _cancelFetch = false;
+               for (var i in childNodes) {
+                 var vertex = childNodes[i];
 
-             _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;
-               });
+                 if (isConnectedVertex(vertex)) {
+                   // found a link to the wider network, not a routing island
+                   return null;
+                 }
 
-               if (cb) {
-                 cb();
-               }
-             });
-           }
+                 if (isRoutableNode(vertex)) {
+                   routingIsland.add(vertex);
+                 }
 
-           function tryAutocomplete() {
-             if (!_canAutocomplete) return;
-             var val = _caseSensitive ? value() : value().toLowerCase();
-             if (!val) return; // Don't autocomplete if user is typing a number - #4935
+                 queueParentWays(vertex);
+               }
+             } // no network link found, this is a routing island, return its members
 
-             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..
+             return routingIsland;
+           }
 
-               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;
-               }
-             }
+           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 (bestIndex !== -1) {
-               var bestVal = _suggestions[bestIndex].value;
-               input.property('value', bestVal);
-               input.node().setSelectionRange(val.length, bestVal.length);
-               return bestVal;
-             }
+             if (vertex.tags.entrance && vertex.tags.entrance !== 'no') return true;
+             if (vertex.tags.amenity === 'parking_entrance') return true;
+             return false;
            }
 
-           function render() {
-             if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
-               hide();
-               return;
-             }
+           function isRoutableNode(node) {
+             // treat elevators as distinct features in the highway network
+             if (node.tags.highway === 'elevator') return true;
+             return false;
+           }
 
-             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;
+           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;
              });
-             options.exit().remove(); // enter/update
+           }
 
-             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.
+           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
 
+                 var map = context.map();
 
-           function accept(d3_event, d) {
-             _cancelFetch = true;
-             var thiz = input.node();
+                 if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+                   map.zoomToEase(vertex);
+                 }
 
-             if (d) {
-               // user clicked on a suggestion
-               utilGetSetValue(input, d.value); // replace field contents
+                 context.enter(modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true));
+               }
+             });
+           }
+         };
 
-               utilTriggerEvent(input, 'change');
-             } // clear (and keep) selection
+         validation.type = type;
+         return validation;
+       }
 
+       function validationFormatting() {
+         var type = 'invalid_format';
 
-             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.
+         var validation = function validation(entity) {
+           var issues = [];
+
+           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
 
+             return !email || valid_email.test(email);
+           }
 
-           function cancel() {
-             _cancelFetch = true;
-             var thiz = input.node(); // clear (and remove) selection, and replace field contents
+           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' : ''
+                   }));
+               }
+           }*/
 
-             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();
+
+           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);
+             });
+
+             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' : ''
+               }));
+             }
            }
-         };
 
-         combobox.canAutocomplete = function (val) {
-           if (!arguments.length) return _canAutocomplete;
-           _canAutocomplete = val;
-           return combobox;
+           return issues;
          };
 
-         combobox.caseSensitive = function (val) {
-           if (!arguments.length) return _caseSensitive;
-           _caseSensitive = val;
-           return combobox;
-         };
+         validation.type = type;
+         return validation;
+       }
 
-         combobox.data = function (val) {
-           if (!arguments.length) return _data;
-           _data = val;
-           return combobox;
-         };
+       function validationHelpRequest(context) {
+         var type = 'help_request';
 
-         combobox.fetcher = function (val) {
-           if (!arguments.length) return _fetcher;
-           _fetcher = val;
-           return combobox;
-         };
+         var validation = function checkFixmeTag(entity) {
+           if (!entity.tags.fixme) return []; // don't flag fixmes on features added by the user
 
-         combobox.minItems = function (val) {
-           if (!arguments.length) return _minItems;
-           _minItems = val;
-           return combobox;
-         };
+           if (entity.version === undefined) return [];
 
-         combobox.itemsMouseEnter = function (val) {
-           if (!arguments.length) return _mouseEnterHandler;
-           _mouseEnterHandler = val;
-           return combobox;
-         };
+           if (entity.v !== undefined) {
+             var baseEntity = context.history().base().hasEntity(entity.id); // don't flag fixmes added by the user on existing features
+
+             if (!baseEntity || !baseEntity.tags.fixme) return [];
+           }
+
+           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]
+           })];
 
-         combobox.itemsMouseLeave = function (val) {
-           if (!arguments.length) return _mouseLeaveHandler;
-           _mouseLeaveHandler = val;
-           return combobox;
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.fixme_tag.reference'));
+           }
          };
 
-         return utilRebind(combobox, dispatch$1, 'on');
+         validation.type = type;
+         return validation;
        }
 
-       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);
-       };
+       function validationImpossibleOneway() {
+         var type = 'impossible_oneway';
 
-       // 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.
+         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 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);
-           });
-         };
-       }
+           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 uiDisclosure(context, key, expandedDefault) {
-         var dispatch$1 = dispatch('toggled');
+           function isOneway(way) {
+             if (way.tags.oneway === 'yes') return true;
+             if (way.tags.oneway) return false;
 
-         var _expanded;
+             for (var key in way.tags) {
+               if (osmOneWayTags[key] && osmOneWayTags[key][way.tags[key]]) {
+                 return true;
+               }
+             }
 
-         var _label = utilFunctor('');
+             return false;
+           }
 
-         var _updatePreference = true;
+           function nodeOccursMoreThanOnce(way, nodeID) {
+             var occurrences = 0;
 
-         var _content = function _content() {};
+             for (var index in way.nodes) {
+               if (way.nodes[index] === nodeID) {
+                 occurrences += 1;
+                 if (occurrences > 1) return true;
+               }
+             }
 
-         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';
+             return false;
            }
 
-           var hideToggle = selection.selectAll('.hide-toggle-' + key).data([0]); // enter
+           function isConnectedViaOtherTypes(way, node) {
+             var wayType = typeForWay(way);
 
-           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
+             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;
+               }
+             }
 
-           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
+             return graph.parentWays(node).some(function (parentWay) {
+               if (parentWay.id === way.id) return false;
 
-           wrap = wrap.enter().append('div').attr('class', 'disclosure-wrap disclosure-wrap-' + key).merge(wrap).classed('hide', !_expanded);
+               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
 
-           if (_expanded) {
-             wrap.call(_content);
+                 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
+
+                   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 toggle(d3_event) {
-             d3_event.preventDefault();
-             _expanded = !_expanded;
+           function issuesForNode(way, nodeID) {
+             var isFirst = nodeID === way.first();
+             var wayType = typeForWay(way); // ignore if this way is self-connected at this node
 
-             if (_updatePreference) {
-               corePreferences('disclosure.' + key + '.expanded', _expanded);
+             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 (!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 (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
+
+             if (attachedOneways.length < attachedWaysOfSameType.length) return [];
+
+             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 [];
              }
 
-             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));
+             var placement = isFirst ? 'start' : 'end',
+                 messageID = wayType + '.',
+                 referenceID = wayType + '.';
 
-             if (_expanded) {
-               wrap.call(_content);
+             if (wayType === 'waterway') {
+               messageID += 'connected.' + placement;
+               referenceID += 'connected';
+             } else {
+               messageID += placement;
+               referenceID += placement;
              }
 
-             dispatch$1.call('toggled', this, _expanded);
-           }
-         };
+             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 = [];
 
-         disclosure.label = function (val) {
-           if (!arguments.length) return _label;
-           _label = utilFunctor(val);
-           return disclosure;
-         };
+                 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
+                       }));
+                     }
+                   }));
+                 }
 
-         disclosure.expanded = function (val) {
-           if (!arguments.length) return _expanded;
-           _expanded = val;
-           return disclosure;
-         };
+                 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);
+                     }
+                   }));
+                 }
 
-         disclosure.updatePreference = function (val) {
-           if (!arguments.length) return _updatePreference;
-           _updatePreference = val;
-           return disclosure;
-         };
+                 return fixes;
+               },
+               loc: node.loc
+             })];
 
-         disclosure.content = function (val) {
-           if (!arguments.length) return _content;
-           _content = val;
-           return disclosure;
+             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'));
+               };
+             }
+           }
          };
 
-         return utilRebind(disclosure, dispatch$1, 'on');
-       }
-
-       // Can be labeled and collapsible.
+         function continueDrawing(way, vertex, context) {
+           // make sure the vertex is actually visible and editable
+           var map = context.map();
 
-       function uiSection(id, context) {
-         var _classes = utilFunctor('');
+           if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+             map.zoomToEase(vertex);
+           }
 
-         var _shouldDisplay;
+           context.enter(modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true));
+         }
 
-         var _content;
+         validation.type = type;
+         return validation;
+       }
 
-         var _disclosure;
+       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 _label;
+         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 _expandedByDefault = utilFunctor(true);
+           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 _disclosureContent;
+         validation.type = type;
+         return validation;
+       }
 
-         var _disclosureExpanded;
+       function validationMaprules() {
+         var type = 'maprules';
 
-         var _containerSelection = select(null);
+         var validation = function checkMaprules(entity, graph) {
+           if (!services.maprules) return [];
+           var rules = services.maprules.validationRules();
+           var issues = [];
 
-         var section = {
-           id: id
-         };
+           for (var i = 0; i < rules.length; i++) {
+             var rule = rules[i];
+             rule.findIssues(entity, graph, issues);
+           }
 
-         section.classes = function (val) {
-           if (!arguments.length) return _classes;
-           _classes = utilFunctor(val);
-           return section;
+           return issues;
          };
 
-         section.label = function (val) {
-           if (!arguments.length) return _label;
-           _label = utilFunctor(val);
-           return section;
-         };
+         validation.type = type;
+         return validation;
+       }
 
-         section.expandedByDefault = function (val) {
-           if (!arguments.length) return _expandedByDefault;
-           _expandedByDefault = utilFunctor(val);
-           return section;
-         };
+       function validationMismatchedGeometry() {
+         var type = 'mismatched_geometry';
 
-         section.shouldDisplay = function (val) {
-           if (!arguments.length) return _shouldDisplay;
-           _shouldDisplay = utilFunctor(val);
-           return section;
-         };
+         function tagSuggestingLineIsArea(entity) {
+           if (entity.type !== 'way' || entity.isClosed()) return null;
+           var tagSuggestingArea = entity.tagSuggestingArea();
 
-         section.content = function (val) {
-           if (!arguments.length) return _content;
-           _content = val;
-           return section;
-         };
+           if (!tagSuggestingArea) {
+             return null;
+           }
 
-         section.disclosureContent = function (val) {
-           if (!arguments.length) return _disclosureContent;
-           _disclosureContent = val;
-           return section;
-         };
+           var asLine = _mainPresetIndex.matchTags(tagSuggestingArea, 'line');
+           var asArea = _mainPresetIndex.matchTags(tagSuggestingArea, 'area');
 
-         section.disclosureExpanded = function (val) {
-           if (!arguments.length) return _disclosureExpanded;
-           _disclosureExpanded = val;
-           return section;
-         }; // may be called multiple times
+           if (asLine && asArea && asLine === asArea) {
+             // these tags also allow lines and making this an area wouldn't matter
+             return null;
+           }
 
+           return tagSuggestingArea;
+         }
 
-         section.render = function (selection) {
-           _containerSelection = selection.selectAll('.section-' + id).data([0]);
+         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
 
-           var sectionEnter = _containerSelection.enter().append('div').attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));
+           if (firstToLastDistanceMeters < 0.75) {
+             testNodes = nodes.slice(); // shallow copy
 
-           _containerSelection = sectionEnter.merge(_containerSelection);
+             testNodes.pop();
+             testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
 
-           _containerSelection.call(renderContent);
-         };
+             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
 
-         section.reRender = function () {
-           _containerSelection.call(renderContent);
-         };
 
-         section.selection = function () {
-           return _containerSelection;
-         };
+           testNodes = nodes.slice(); // shallow copy
 
-         section.disclosure = function () {
-           return _disclosure;
-         }; // may be called multiple times
+           testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
 
+           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'));
+             };
+           }
+         }
 
-         function renderContent(selection) {
-           if (_shouldDisplay) {
-             var shouldDisplay = _shouldDisplay();
+         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
 
-             selection.classed('hide', !shouldDisplay);
+                   for (var key in tagSuggestingArea) {
+                     delete tags[key];
+                   }
 
-             if (!shouldDisplay) {
-               selection.html('');
-               return;
+                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_tag.annotation'));
+                 }
+               }));
+               return fixes;
              }
+           });
+
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.tag_suggests_area.reference'));
            }
+         }
 
-           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);
-             }
+         function vertexPointIssue(entity, graph) {
+           // we only care about nodes
+           if (entity.type !== 'node') return null; // ignore tagless points
 
-             if (_disclosureExpanded !== undefined) {
-               _disclosure.expanded(_disclosureExpanded);
+           if (Object.keys(entity.tags).length === 0) return null; // address lines are special so just ignore them
 
-               _disclosureExpanded = undefined;
-             }
+           if (entity.isOnAddressLine(graph)) return null;
+           var geometry = entity.geometry(graph);
+           var allowedGeometries = osmNodeGeometriesForTags(entity.tags);
 
-             selection.call(_disclosure);
-             return;
+           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
+             });
            }
 
-           if (_content) {
-             selection.call(_content);
+           return 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;
            }
+
+           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
+           });
          }
 
-         return section;
-       }
+         function lineToAreaDynamicFixes(context) {
+           var convertOnClick;
+           var entityId = this.entityIds[0];
+           var entity = context.entity(entityId);
+           var tags = Object.assign({}, entity.tags); // shallow copy
 
-       // {
-       //   key: 'string',     // required
-       //   value: 'string'    // optional
-       // }
-       //   -or-
-       // {
-       //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
-       // }
-       //
+           delete tags.area;
 
-       function uiTagReference(what) {
-         var wikibase = what.qid ? services.wikidata : services.osmWikibase;
-         var tagReference = {};
+           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
 
-         var _button = select(null);
+               if (tags.area) {
+                 delete tags.area;
+               }
 
-         var _body = select(null);
+               context.perform(actionChangeTags(entityId, tags), _t('issues.fix.convert_to_line.annotation'));
+             };
+           }
 
-         var _loaded;
+           return [new validationIssueFix({
+             icon: 'iD-icon-line',
+             title: _t.html('issues.fix.convert_to_line.title'),
+             onClick: convertOnClick
+           })];
+         }
 
-         var _showing;
+         function extractPointDynamicFixes(context) {
+           var entityId = this.entityIds[0];
+           var extractOnClick = null;
 
-         function load() {
-           if (!wikibase) return;
+           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
 
-           _button.classed('tag-reference-loading', true);
+               context.enter(modeSelect(context, [action.getExtractedNodeID()]));
+             };
+           }
 
-           wikibase.getDocs(what, gotDocs);
+           return [new validationIssueFix({
+             icon: 'iD-operation-extract',
+             title: _t.html('issues.fix.extract_point.title'),
+             onClick: extractOnClick
+           })];
          }
 
-         function gotDocs(err, docs) {
-           _body.html('');
+         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 = [];
 
-           if (!docs || !docs.title) {
-             _body.append('p').attr('class', 'tag-reference-description').html(_t.html('inspector.no_documentation_key'));
+           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
 
-             done();
-             return;
+             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);
            }
 
-           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();
+           return issues;
+
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.unclosed_multipolygon_part.reference'));
            }
+         }
 
-           _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'));
+         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);
+         };
 
-           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
+         validation.type = type;
+         return validation;
+       }
 
+       function validationMissingRole() {
+         var type = 'missing_role';
 
-           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'));
-           }
-         }
+         var validation = function checkMissingRole(entity, graph) {
+           var issues = [];
 
-         function done() {
-           _loaded = true;
+           if (entity.type === 'way') {
+             graph.parentRelations(entity).forEach(function (relation) {
+               if (!relation.isMultipolygon()) return;
+               var member = relation.memberById(entity.id);
 
-           _button.classed('tag-reference-loading', false);
+               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);
 
-           _body.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1');
+               if (way && isMissingRole(member)) {
+                 issues.push(makeIssue(way, entity, member));
+               }
+             });
+           }
 
-           _showing = true;
+           return issues;
+         };
 
-           _button.selectAll('svg.icon use').each(function () {
-             var iconUse = select(this);
+         function isMissingRole(member) {
+           return !member.role || !member.role.trim().length;
+         }
 
-             if (iconUse.attr('href') === '#iD-icon-info') {
-               iconUse.attr('href', '#iD-icon-info-filled');
+         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 showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.missing_role.multipolygon.reference'));
+           }
          }
 
-         function hide() {
-           _body.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
-             _body.classed('expanded', false);
+         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
+               }));
+             }
            });
+         }
 
-           _showing = false;
+         validation.type = type;
+         return validation;
+       }
 
-           _button.selectAll('svg.icon use').each(function () {
-             var iconUse = select(this);
+       function validationMissingTag(context) {
+         var type = 'missing_tag';
 
-             if (iconUse.attr('href') === '#iD-icon-info-filled') {
-               iconUse.attr('href', '#iD-icon-info');
-             }
+         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;
+             });
            });
-         }
 
-         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);
+           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);
+           }
 
-           _button.on('click', function (d3_event) {
-             d3_event.stopPropagation();
-             d3_event.preventDefault();
-             this.blur(); // avoid keeping focus on the button - #4641
+           return entityDescriptiveKeys.length > 0;
+         }
 
-             if (_showing) {
-               hide();
-             } else if (_loaded) {
-               done();
-             } else {
-               load();
-             }
-           });
-         };
+         function isUnknownRoad(entity) {
+           return entity.type === 'way' && entity.tags.highway === 'road';
+         }
 
-         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 isUntypedRelation(entity) {
+           return entity.type === 'relation' && !entity.tags.type;
+         }
 
-           _body.exit().remove();
+         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
 
-           _body = _body.enter().append('div').attr('class', 'tag-reference-body').style('max-height', '0').style('opacity', '0').merge(_body);
+           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
 
-           if (_showing === false) {
-             hide();
+
+           if (!subtype && isUnknownRoad(entity)) {
+             subtype = 'highway_classification';
            }
-         };
 
-         tagReference.showing = function (val) {
-           if (!arguments.length) return _showing;
-           _showing = val;
-           return tagReference;
-         };
+           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..
 
-         return tagReference;
-       }
+           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();
 
-       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'
-         }];
+               if (!disabledReasonID) {
+                 deleteOnClick = function deleteOnClick(context) {
+                   var id = this.issue.entityIds[0];
+                   var operation = operationDelete(context, [id]);
 
-         var _tagView = corePreferences('raw-tag-editor-view') || 'list'; // 'list, 'text'
+                   if (!operation.disabled()) {
+                     operation();
+                   }
+                 };
+               }
 
+               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;
+             }
+           })];
 
-         var _readOnlyTags = []; // the keys in the order we want them to display
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.' + referenceID + '.reference'));
+           }
+         };
 
-         var _orderedKeys = [];
-         var _showBlank = false;
-         var _pendingChange = null;
+         validation.type = type;
+         return validation;
+       }
 
-         var _state;
+       function validationOutdatedTags() {
+         var type = 'outdated_tags';
+         var _waitingForDeprecated = true;
 
-         var _presets;
+         var _dataDeprecated; // fetch deprecated tags
 
-         var _tags;
 
-         var _entityIDs;
+         _mainFileFetcher.get('deprecated').then(function (d) {
+           return _dataDeprecated = d;
+         })["catch"](function () {
+           /* ignore */
+         })["finally"](function () {
+           return _waitingForDeprecated = false;
+         });
 
-         var _didInteract = false;
+         function oldTagIssues(entity, graph) {
+           var oldTags = Object.assign({}, entity.tags); // shallow copy
 
-         function interacted() {
-           _didInteract = true;
-         }
+           var preset = _mainPresetIndex.match(entity, graph);
+           var subtype = 'deprecated_tags';
+           if (!preset) return [];
+           if (!entity.hasInterestingTags()) return []; // Upgrade preset, if a replacement is available..
 
-         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 (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..
 
-           var all = Object.keys(_tags).sort();
-           var missingKeys = utilArrayDifference(all, _orderedKeys);
 
-           for (var i in missingKeys) {
-             _orderedKeys.push(missingKeys[i]);
-           } // assemble row data
+           if (_dataDeprecated) {
+             var deprecatedTags = entity.deprecatedTags(_dataDeprecated);
 
+             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
 
-           var rowData = _orderedKeys.map(function (key, i) {
-             return {
-               index: i,
-               key: key,
-               value: _tags[key]
-             };
-           }); // append blank row last, if necessary
 
+           var newTags = Object.assign({}, entity.tags); // shallow copy
 
-           if (!rowData.length || _showBlank) {
-             _showBlank = false;
-             rowData.push({
-               index: rowData.length,
-               key: '',
-               value: ''
+           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];
+                 }
+               }
              });
-           } // View Options
+           } // Attempt to match a canonical record in the name-suggestion-index.
 
 
-           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
+           var nsi = services.nsi;
+           var waitingForNsi = false;
+           var nsiResult;
 
-           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 (nsi) {
+             waitingForNsi = nsi.status() === 'loading';
 
-           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
+             if (!waitingForNsi) {
+               var loc = entity.extent(graph).center();
+               nsiResult = nsi.upgradeTags(newTags, loc);
 
-           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
+               if (nsiResult) {
+                 newTags = nsiResult.newTags;
+                 subtype = 'noncanonical_brand';
+               }
+             }
+           }
 
-           addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
-           // Tag list items
+           var issues = [];
+           issues.provisional = _waitingForDeprecated || waitingForNsi; // determine diff
 
-           var items = list.selectAll('.tag-row').data(rowData, function (d) {
-             return d.key;
+           var tagDiff = utilTagDiff(oldTags, newTags);
+           if (!tagDiff.length) return issues;
+           var isOnlyAddingTags = tagDiff.every(function (d) {
+             return d.type === '+';
            });
-           items.exit().each(unbind).remove(); // Enter
+           var prefix = '';
 
-           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 (nsiResult) {
+             prefix = 'noncanonical_brand.';
+           } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
+             subtype = 'incomplete_tags';
+             prefix = 'incomplete.';
+           } // don't allow autofixing brand tags
 
-           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
+           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 (_entityIDs && taginfo && _state !== 'hover') {
-               bindTypeahead(key, value);
+               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'));
+                   }
+                 }));
+               }
+
+               return fixes;
              }
+           }));
+           return issues;
+
+           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 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
+
+             var wd = item.mainTag; // e.g. `brand:wikidata`
 
-             var referenceOptions = {
-               key: d.key
-             };
+             var notwd = "not:".concat(wd); // e.g. `not:brand:wikidata`
 
-             if (typeof d.value === 'string') {
-               referenceOptions.value = d.value;
-             }
+             var qid = item.tags[wd];
+             newTags[notwd] = qid;
 
-             var reference = uiTagReference(referenceOptions);
+             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`
 
-             if (_state === 'hover') {
-               reference.showing(false);
+               delete newTags[wp]; // remove `brand:wikipedia`
              }
 
-             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
-         }
+             return actionChangeTags(currEntity.id, newTags)(graph);
+           }
 
-         function isReadOnly(d) {
-           for (var i = 0; i < _readOnlyTags.length; i++) {
-             if (d.key.match(_readOnlyTags[i]) !== null) {
-               return true;
+           function showMessage(context) {
+             var currEntity = context.hasEntity(entity.id);
+             if (!currEntity) return '';
+             var messageID = "issues.outdated_tags.".concat(prefix, "message");
+
+             if (subtype === 'noncanonical_brand' && isOnlyAddingTags) {
+               messageID += '_incomplete';
              }
+
+             return _t.html(messageID, {
+               feature: utilDisplayLabel(currEntity, context.graph(), true
+               /* verbose */
+               )
+             });
            }
 
-           return false;
+           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;
+             });
+           }
          }
 
-         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 oldMultipolygonIssues(entity, graph) {
+           var multipolygon, outerWay;
 
-         function stringify(s) {
-           return JSON.stringify(s).slice(1, -1); // without leading/trailing "
-         }
+           if (entity.type === 'relation') {
+             outerWay = osmOldMultipolygonOuterMemberOfRelation(entity, graph);
+             multipolygon = entity;
+           } else if (entity.type === 'way') {
+             multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
+             outerWay = entity;
+           } else {
+             return [];
+           }
 
-         function unstringify(s) {
-           var leading = '';
-           var trailing = '';
+           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 (s.length < 1 || s.charAt(0) !== '"') {
-             leading = '"';
+           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 (s.length < 2 || s.charAt(s.length - 1) !== '"' || s.charAt(s.length - 1) === '"' && s.charAt(s.length - 2) === '\\') {
-             trailing = '"';
+           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 */
+               )
+             });
            }
 
-           return JSON.parse(leading + s + trailing);
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.old_multipolygon.reference'));
+           }
          }
 
-         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');
+         var validation = function checkOutdatedTags(entity, graph) {
+           var issues = oldMultipolygonIssues(entity, graph);
+           if (!issues.length) issues = oldTagIssues(entity, graph);
+           return issues;
+         };
 
-           if (_state !== 'hover' && str.length) {
-             return str + '\n';
-           }
+         validation.type = type;
+         return validation;
+       }
 
-           return str;
-         }
+       function validationPrivateData() {
+         var type = 'private_data'; // assume that some buildings are private
 
-         function textChanged() {
-           var newText = this.value.trim();
-           var newTags = {};
-           newText.split('\n').forEach(function (row) {
-             var m = row.match(/^\s*([^=]+)=(.*)$/);
+         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
 
-             if (m !== null) {
-               var k = context.cleanTagKey(unstringify(m[1].trim()));
-               var v = context.cleanTagValue(unstringify(m[2].trim()));
-               newTags[k] = v;
-             }
-           });
-           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 publicKeys = {
+           amenity: true,
+           craft: true,
+           historic: true,
+           leisure: true,
+           office: true,
+           shop: true,
+           tourism: true
+         }; // these tags may contain personally identifying info
 
-             if (change.newVal === '*' && typeof change.oldVal !== 'string') return;
+         var personalTags = {
+           'contact:email': true,
+           'contact:fax': true,
+           'contact:phone': true,
+           email: true,
+           fax: true,
+           phone: true
+         };
 
-             if (change.type === '-') {
-               _pendingChange[change.key] = undefined;
-             } else if (change.type === '+') {
-               _pendingChange[change.key] = change.newVal || '';
+         var validation = function checkPrivateData(entity) {
+           var tags = entity.tags;
+           if (!tags.building || !privateBuildingValues[tags.building]) return [];
+           var keepTags = {};
+
+           for (var k in tags) {
+             if (publicKeys[k]) return []; // probably a public feature
+
+             if (!personalTags[k]) {
+               keepTags[k] = tags[k];
              }
-           });
+           }
 
-           if (Object.keys(_pendingChange).length === 0) {
-             _pendingChange = null;
-             return;
+           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'));
+                 }
+               })];
+             }
+           })];
+
+           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);
            }
 
-           scheduleChange();
-         }
+           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())
+             });
+           }
 
-         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();
+           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;
+             });
            }
-         }
+         };
 
-         function bindTypeahead(key, value) {
-           if (isReadOnly(key.datum())) return;
+         validation.type = type;
+         return validation;
+       }
 
-           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;
+       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.
 
-               var data = _tags[keyString].filter(Boolean).map(function (tagValue) {
-                 return {
-                   value: tagValue,
-                   title: tagValue
-                 };
-               });
+         function isGenericMatchInNsi(tags) {
+           var nsi = services.nsi;
 
-               callback(data);
-             }));
-             return;
+           if (nsi) {
+             _waitingForNsi = nsi.status() === 'loading';
+
+             if (!_waitingForNsi) {
+               return nsi.isGenericName(tags);
+             }
            }
 
-           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));
-             });
-           }));
+           return false;
+         } // Test if the name is just the key or tag value (e.g. "park")
 
-           function sort(value, data) {
-             var sameletter = [];
-             var other = [];
 
-             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]);
+         function nameMatchesRawTag(lowercaseName, tags) {
+           for (var i = 0; i < keysToTestForGenericValues.length; i++) {
+             var key = keysToTestForGenericValues[i];
+             var val = tags[key];
+
+             if (val) {
+               val = val.toLowerCase();
+
+               if (key === lowercaseName || val === lowercaseName || key.replace(/\_/g, ' ') === lowercaseName || val.replace(/\_/g, ' ') === lowercaseName) {
+                 return true;
                }
              }
-
-             return sameletter.concat(other);
            }
+
+           return false;
          }
 
-         function unbind() {
-           var row = select(this);
-           row.selectAll('input.key').call(uiCombobox.off, context);
-           row.selectAll('input.value').call(uiCombobox.off, context);
+         function isGenericName(name, tags) {
+           name = name.toLowerCase();
+           return nameMatchesRawTag(name, tags) || isGenericMatchInNsi(tags);
          }
 
-         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
+         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
 
-           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
+                   delete tags[nameKey];
+                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_generic_name.annotation'));
+                 }
+               })];
+             }
+           });
 
-           if (isReadOnly({
-             key: kNew
-           })) {
-             this.value = kOld;
-             return;
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.generic_name.reference'));
            }
+         }
 
-           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
-
-             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 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 row = this.parentNode.parentNode;
-           var inputVal = select(row).selectAll('input.value');
-           var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
-           _pendingChange = _pendingChange || {};
+                   delete tags[nameKey];
+                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_mistaken_name.annotation'));
+                 }
+               })];
+             }
+           });
 
-           if (kOld) {
-             _pendingChange[kOld] = undefined;
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.generic_name.reference'));
            }
+         }
 
-           _pendingChange[kNew] = vNew; // update the ordered key index so this row doesn't change position
+         var validation = function checkGenericName(entity) {
+           var tags = entity.tags; // a generic name is allowed if it's a known brand or entity
 
-           var existingKeyIndex = _orderedKeys.indexOf(kOld);
+           var hasWikidata = !!tags.wikidata || !!tags['brand:wikidata'] || !!tags['operator:wikidata'];
+           if (hasWikidata) return [];
+           var issues = [];
+           var notNames = (tags['not:name'] || '').split(';');
 
-           if (existingKeyIndex !== -1) _orderedKeys[existingKeyIndex] = kNew;
-           d.key = kNew; // update datum to avoid exit/enter on tag update
+           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];
 
-           d.value = vNew;
-           this.value = kNew;
-           utilGetSetValue(inputVal, vNew);
-           scheduleChange();
-         }
+             if (notNames.length) {
+               for (var i in notNames) {
+                 var notName = notNames[i];
 
-         function valueChange(d3_event, d) {
-           if (isReadOnly(d)) return; // exit if this is a multiselection and no value was entered
+                 if (notName && value === notName) {
+                   issues.push(makeIncorrectNameIssue(entity.id, key, value, langCode));
+                   continue;
+                 }
+               }
+             }
 
-           if (typeof d.value !== 'string' && !this.value) return; // exit if we are currently about to delete this row anyway - #6366
+             if (isGenericName(value, tags)) {
+               issues.provisional = _waitingForNsi; // retry later if we are waiting on NSI to finish loading
 
-           if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) return;
-           _pendingChange = _pendingChange || {};
-           _pendingChange[d.key] = context.cleanTagValue(this.value);
-           scheduleChange();
-         }
+               issues.push(makeGenericNameIssue(entity.id, key, value, langCode));
+             }
+           }
 
-         function removeTag(d3_event, d) {
-           if (isReadOnly(d)) return;
+           return issues;
+         };
 
-           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();
-           }
-         }
+         validation.type = type;
+         return validation;
+       }
 
-         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 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
 
-         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 epsilon = 0.05;
+         var nodeThreshold = 10;
 
-           window.setTimeout(function () {
-             if (!_pendingChange) return;
-             dispatch$1.call('change', this, entityIDs, _pendingChange);
-             _pendingChange = null;
-           }, 10);
+         function isBuilding(entity, graph) {
+           if (entity.type !== 'way' || entity.geometry(graph) !== 'area') return false;
+           return entity.tags.building && entity.tags.building !== 'no';
          }
 
-         section.state = function (val) {
-           if (!arguments.length) return _state;
+         var validation = function checkUnsquareWay(entity, graph) {
+           if (!isBuilding(entity, graph)) return []; // don't flag ways marked as physically unsquare
 
-           if (_state !== val) {
-             _orderedKeys = [];
-             _state = val;
-           }
+           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
 
-           return section;
-         };
+           var nodes = graph.childNodes(entity).slice(); // shallow copy
 
-         section.presets = function (val) {
-           if (!arguments.length) return _presets;
-           _presets = val;
+           if (nodes.length > nodeThreshold + 1) return []; // +1 because closing node appears twice
+           // ignore if not all nodes are fully downloaded
 
-           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 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
 
-           return section;
-         };
+           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
 
-         section.tags = function (val) {
-           if (!arguments.length) return _tags;
-           _tags = val;
-           return section;
-         };
+           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.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
+           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
 
-           if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-             _entityIDs = val;
-             _orderedKeys = [];
+             autoArgs = [autoAction, _t('operations.orthogonalize.annotation.feature', {
+               n: 1
+             })];
            }
 
-           return section;
-         }; // pass an array of regular expressions to test against the tag key
+           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
 
+                   context.perform(actionOrthogonalize(entityId, context.projection, undefined, degreeThreshold), _t('operations.orthogonalize.annotation.feature', {
+                     n: 1
+                   })); // run after the squaring transition (currently 150ms)
 
-         section.readOnlyTags = function (val) {
-           if (!arguments.length) return _readOnlyTags;
-           _readOnlyTags = 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')
+                       );
+                   }
+               })
+               */
+               ];
+             }
+           })];
+
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.unsquare_way.buildings.reference'));
+           }
          };
 
-         return utilRebind(section, dispatch$1, 'on');
+         validation.type = type;
+         return validation;
        }
 
-       function uiDataEditor(context) {
-         var dataHeader = uiDataHeader();
-         var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context).expandedByDefault(true).readOnlyTags([/./]);
+       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
+       });
 
-         var _datum;
+       function coreValidator(context) {
+         var _this = this;
 
-         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
+         var dispatch = dispatch$8('validated', 'focusedIssue');
+         var validator = utilRebind({}, dispatch, 'on');
+         var _rules = {};
+         var _disabledRules = {};
 
-           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 _ignoredIssueIDs = new Set();
 
-           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 _resolvedIssueIDs = new Set();
 
-         dataEditor.datum = function (val) {
-           if (!arguments.length) return _datum;
-           _datum = val;
-           return this;
-         };
+         var _baseCache = validationCache('base'); // issues before any user edits
 
-         return dataEditor;
-       }
 
-       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
+         var _headCache = validationCache('head'); // issues after all user edits
 
-         function selectData(d3_event, drawn) {
-           var selection = context.surface().selectAll('.layer-mapdata .data' + selectedDatum.__featurehash__);
 
-           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 _completeDiff = {}; // complete diff base -> head of what the user changed
 
-             if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-               context.enter(modeBrowse(context));
-             }
-           } else {
-             selection.classed('selected', true);
-           }
-         }
+         var _headIsCurrent = false;
 
-         function esc() {
-           if (context.container().select('.combobox').size()) return;
-           context.enter(modeBrowse(context));
-         }
+         var _deferredRIC = new Set(); // Set( RequestIdleCallback handles )
 
-         mode.zoomToSelected = function () {
-           var extent = geoExtent(d3_geoBounds(selectedDatum));
-           context.map().centerZoomEase(extent.center(), context.map().trimmedExtentZoom(extent));
-         };
 
-         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 _deferredST = new Set(); // Set( SetTimeout handles )
 
-           var extent = geoExtent(d3_geoBounds(selectedDatum));
-           sidebar.expand(sidebar.intersects(extent));
-           context.map().on('drawn.select-data', selectData);
-         };
 
-         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();
-         };
+         var _headPromise; // Promise fulfilled when validation is performed up to headGraph snapshot
 
-         return mode;
-       }
 
-       function uiImproveOsmComments() {
-         var _qaItem;
+         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 }
+         //
 
-         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
 
-           services.improveOSM.getComments(_qaItem).then(function (d) {
-             if (!d.comments) return; // nothing to do here
+         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 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);
+           function makeRegExp(str) {
+             var escaped = str.replace(/[-\/\\^$+?.()|[\]{}]/g, '\\$&') // escape all reserved chars except for the '*'
+             .replace(/\*/g, '.*'); // treat a '*' like '.*'
 
-               if (osm && d.username) {
-                 selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.username)).attr('target', '_blank');
-               }
+             return new RegExp('^' + escaped + '$');
+           }
+         } // `init()`
+         // Initialize the validator, called once on iD startup
+         //
 
-               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;
-             });
-           })["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
+         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');
 
-           if (isNaN(d.getTime())) return null;
-           return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
-         }
+           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
+         //
 
-         issueComments.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return issueComments;
-         };
 
-         return issueComments;
-       }
+         function reset(resetIgnored) {
+           // cancel deferred work
+           _deferredRIC.forEach(window.cancelIdleCallback);
 
-       function uiImproveOsmDetails(context) {
-         var _qaItem;
+           _deferredRIC.clear();
 
-         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
+           _deferredST.forEach(window.clearTimeout);
 
-           return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".description"), d.replacements);
-         }
+           _deferredST.clear(); // empty queues and resolve any pending promise
 
-         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 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..
+           _baseCache.queue = [];
+           _headCache.queue = [];
+           processQueue(_headCache);
+           processQueue(_baseCache); // clear caches
 
-           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 (resetIgnored) _ignoredIssueIDs.clear();
 
-             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');
+           _resolvedIssueIDs.clear();
 
-               if (!osmlayer.enabled()) {
-                 osmlayer.enabled(true);
-               }
+           _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)
+         //
 
-               context.map().centerZoom(_qaItem.loc, 20);
 
-               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)
+         validator.reset = function () {
+           reset(true);
+         }; // `resetIgnoredIssues()`
+         // clears out the _ignoredIssueIDs Set
+         //
 
-             if (entity) {
-               var name = utilDisplayName(entity); // try to use common name
 
-               if (!name && !isObjectLink) {
-                 var preset = _mainPresetIndex.match(entity, context.graph());
-                 name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
-               }
+         validator.resetIgnoredIssues = function () {
+           _ignoredIssueIDs.clear();
 
-               if (name) {
-                 this.innerText = name;
-               }
-             }
-           }); // Don't hide entities related to this error - #5880
+           dispatch.call('validated'); // redraw UI
+         }; // `revalidateUnsquare()`
+         // Called whenever the user changes the unsquare threshold
+         // It reruns just the "unsquare_way" validation on all buildings.
+         //
 
-           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;
+         validator.revalidateUnsquare = function () {
+           revalidateUnsquare(_headCache);
+           revalidateUnsquare(_baseCache);
+           dispatch.call('validated');
          };
 
-         return improveOsmDetails;
-       }
+         function revalidateUnsquare(cache) {
+           var checkUnsquareWay = _rules.unsquare_way;
+           if (!cache.graph || typeof checkUnsquareWay !== 'function') return; // uncache existing
 
-       function uiImproveOsmHeader() {
-         var _qaItem;
+           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
 
-         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
+           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
+         //
 
-           return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".title"), d.replacements);
-         }
 
-         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;
+         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 (!picon) {
-               return '';
-             } else {
-               var isMaki = /^maki-/.test(picon);
-               return "#".concat(picon).concat(isMaki ? '-11' : '');
-             }
-           });
-           headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
-         }
+               if (!filter(issue)) return;
+               seen.add(issue.id);
+               results.push(issue);
+             });
+           } // collect base issues - present before user edits
 
-         improveOsmHeader.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return improveOsmHeader;
-         };
 
-         return improveOsmHeader;
-       }
+           if (opts.what === 'all') {
+             Object.values(_baseCache.issuesByIssueID).forEach(function (issue) {
+               if (!filter(issue)) return;
+               seen.add(issue.id);
+               results.push(issue);
+             });
+           }
 
-       function uiImproveOsmEditor(context) {
-         var dispatch$1 = dispatch('change');
-         var qaDetails = uiImproveOsmDetails(context);
-         var qaComments = uiImproveOsmComments();
-         var qaHeader = uiImproveOsmHeader();
+           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.
 
-         var _qaItem;
+           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.
 
-         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);
-         }
+             if ((issue.entityIds || []).some(function (id) {
+               return !context.hasEntity(id);
+             })) return false;
 
-         function improveOsmSaveSection(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+             if (opts.where === 'visible') {
+               var extent = issue.extent(context.graph());
+               if (!view.intersects(extent)) return false;
+             }
 
-           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
+             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
+         //
 
-           saveSection.exit().remove(); // enter
 
-           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
+         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
+         //
 
-           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 
-           function changeInput() {
-             var input = select(this);
-             var val = input.property('value').trim();
+         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..
 
-             if (val === '') {
-               val = undefined;
-             } // store the unsaved comment with the issue itself
+           var issueExtent = issue.extent(graph);
 
+           if (issueExtent) {
+             focusCenter = issueExtent.center();
+           } // Try to select the first entity in the issue..
 
-             _qaItem = _qaItem.update({
-               newComment: val
-             });
-             var qaService = services.improveOSM;
 
-             if (qaService) {
-               qaService.replaceItem(_qaItem);
-             }
+           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.
 
-             saveSection.call(qaSaveButtons);
-           }
-         }
+             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 qaSaveButtons(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+               if (!nodeID) {
+                 // relation has no downloaded nodes to focus on
+                 var wayID = ids.find(function (id) {
+                   return id.charAt(0) === 'w' && graph.hasEntity(id);
+                 });
 
-           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
-             return d.status + d.id;
-           }); // exit
+                 if (wayID) {
+                   nodeID = graph.entity(wayID).first(); // focus on the first node of this way
+                 }
+               }
 
-           buttonSection.exit().remove(); // enter
+               if (nodeID) {
+                 focusCenter = graph.entity(nodeID).loc;
+               }
+             }
+           }
 
-           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
+           if (focusCenter) {
+             // Adjust the view
+             var setZoom = Math.max(context.map().zoom(), 19);
+             context.map().unobscuredCenterZoomEase(focusCenter, setZoom);
+           }
 
-           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
+           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 qaService = services.improveOSM;
 
-             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
+         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
+         //
 
-             var qaService = services.improveOSM;
 
-             if (qaService) {
-               d.newStatus = 'SOLVED';
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
+         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);
+             });
+           }).sort(function (issue1, issue2) {
+             if (issue1.type === issue2.type) {
+               // issues of the same type, sort deterministically
+               return issue1.id < issue2.id ? -1 : 1;
              }
-           });
-           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;
+             var index1 = orderedIssueTypes.indexOf(issue1.type);
+             var index2 = orderedIssueTypes.indexOf(issue2.type);
 
-             if (qaService) {
-               d.newStatus = 'INVALID';
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
+             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;
              }
            });
-         } // NOTE: Don't change method name until UI v3 is merged
-
-
-         improveOsmEditor.error = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return improveOsmEditor;
-         };
-
-         return utilRebind(improveOsmEditor, dispatch$1, 'on');
-       }
+         }; // `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
+         //
 
-       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
+         validator.getEntityIssues = function (entityID, options) {
+           return validator.getSharedEntityIssues([entityID], options);
+         }; // `getRuleKeys()`
+         //
+         // Returns
+         //   An Array containing the rule keys
+         //
 
-           var detail = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".description"), replacements);
 
-           if (detail === unknown) {
-             detail = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".description"), replacements);
-           }
+         validator.getRuleKeys = function () {
+           return Object.keys(_rules);
+         }; // `isRuleEnabled()`
+         //
+         // Arguments
+         //   `key` - the rule to check (e.g. 'crossing_ways')
+         // Returns
+         //   `true`/`false`
+         //
 
-           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
+         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')
+         //
 
-           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..
 
-           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
+         validator.toggleRule = function (key) {
+           if (_disabledRules[key]) {
+             delete _disabledRules[key];
+           } else {
+             _disabledRules[key] = true;
+           }
 
-             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');
+           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
+         //
 
-               if (!osmlayer.enabled()) {
-                 osmlayer.enabled(true);
-               }
 
-               context.map().centerZoomEase(_qaItem.loc, 20);
+         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
+         //
 
-               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 (entity) {
-               var name = utilDisplayName(entity); // try to use common name
+         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.
+         //
 
-               if (!name && !isObjectLink) {
-                 var preset = _mainPresetIndex.match(entity, context.graph());
-                 name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
-               }
 
-               if (name) {
-                 this.innerText = name;
-               }
-             }
-           }); // Don't hide entities related to this issue - #5880
+         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();
 
-           context.features().forceVisible(relatedEntities);
-           context.map().pan([0, 0]); // trigger a redraw
-         }
+           if (currGraph === prevGraph) {
+             // _headCache.graph is current - we are caught up
+             _headIsCurrent = true;
+             dispatch.call('validated');
+             return Promise.resolve();
+           }
 
-         keepRightDetails.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return keepRightDetails;
-         };
+           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
 
-         return keepRightDetails;
-       }
+             return _headPromise;
+           } // If we get here, its time to start validating stuff.
 
-       function uiKeepRightHeader() {
-         var _qaItem;
 
-         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
+           _headCache.graph = currGraph; // take snapshot
 
-           var title = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".title"), replacements);
+           _completeDiff = context.history().difference().complete();
+           var incrementalDiff = coreDifference(prevGraph, currGraph);
+           var entityIDs = Object.keys(incrementalDiff.complete());
+           entityIDs = _headCache.withAllRelatedEntities(entityIDs); // expand set
 
-           if (title === unknown) {
-             title = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".title"), replacements);
+           if (!entityIDs.size) {
+             dispatch.call('validated');
+             return Promise.resolve();
            }
 
-           return title;
-         }
+           _headPromise = validateEntitiesAsync(entityIDs, _headCache).then(function () {
+             return updateResolvedIssues(entityIDs);
+           }).then(function () {
+             return dispatch.call('validated');
+           })["catch"](function () {
+             /* ignore */
+           }).then(function () {
+             _headPromise = null;
 
-         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;
+             if (!_headIsCurrent) {
+               validator.validate(); // run it again to catch up to current graph
+             }
            });
-           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);
-         }
+           return _headPromise;
+         }; // register event handlers:
+         // WHEN TO RUN VALIDATION:
+         // When history changes:
 
-         keepRightHeader.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return keepRightHeader;
-         };
 
-         return keepRightHeader;
-       }
+         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 uiViewOnKeepRight() {
-         var _qaItem;
+           validator.validate();
+         }); // but not on 'change' (e.g. while drawing)
+         // When user changes editing modes (to catch recent changes e.g. drawing)
 
-         function viewOnKeepRight(selection) {
-           var url;
+         context.on('exit.validator', validator.validate); // When merging fetched data, validate base graph:
 
-           if (services.keepRight && _qaItem instanceof QAItem) {
-             url = services.keepRight.issueURL(_qaItem);
-           }
+         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 link = selection.selectAll('.view-on-keepRight').data(url ? [url] : []); // exit
+           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;
+           });
+           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
+         //   }
+         //
 
-           link.exit().remove(); // enter
+         function validateEntity(entity, graph) {
+           var result = {
+             issues: [],
+             provisional: false
+           };
+           Object.keys(_rules).forEach(runValidation); // run all rules
 
-           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'));
-         }
+           return result; // runs validation and appends resulting issues
 
-         viewOnKeepRight.what = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return viewOnKeepRight;
-         };
+           function runValidation(key) {
+             var fn = _rules[key];
 
-         return viewOnKeepRight;
-       }
+             if (typeof fn !== 'function') {
+               console.error('no such validation rule = ' + key); // eslint-disable-line no-console
 
-       function uiKeepRightEditor(context) {
-         var dispatch$1 = dispatch('change');
-         var qaDetails = uiKeepRightDetails(context);
-         var qaHeader = uiKeepRightHeader();
+               return;
+             }
 
-         var _qaItem;
+             var detected = fn(entity, graph);
 
-         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));
-         }
+             if (detected.provisional) {
+               // this validation should be run again later
+               result.provisional = true;
+             }
 
-         function keepRightSaveSection(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+             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.
 
-           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 applySeverityOverrides(issue) {
+               var type = issue.type;
+               var subtype = issue.subtype || '';
+               var i;
 
-           saveSection.exit().remove(); // enter
+               for (i = 0; i < _errorOverrides.length; i++) {
+                 if (_errorOverrides[i].type.test(type) && _errorOverrides[i].subtype.test(subtype)) {
+                   issue.severity = 'error';
+                   return true;
+                 }
+               }
 
-           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
+               for (i = 0; i < _warningOverrides.length; i++) {
+                 if (_warningOverrides[i].type.test(type) && _warningOverrides[i].subtype.test(subtype)) {
+                   issue.severity = 'warning';
+                   return true;
+                 }
+               }
 
-           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
+               for (i = 0; i < _disableOverrides.length; i++) {
+                 if (_disableOverrides[i].type.test(type) && _disableOverrides[i].subtype.test(subtype)) {
+                   return false;
+                 }
+               }
 
-           function changeInput() {
-             var input = select(this);
-             var val = input.property('value').trim();
+               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.
+         //
 
-             if (val === _qaItem.comment) {
-               val = undefined;
-             } // store the unsaved comment with the issue itself
 
+         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);
+               });
 
-             _qaItem = _qaItem.update({
-               newComment: val
+               if (userModified && !_headCache.issuesByIssueID[issueID]) {
+                 // issue seems fixed
+                 _resolvedIssueIDs.add(issueID);
+               } else {
+                 // issue still not resolved
+                 _resolvedIssueIDs["delete"](issueID); // (did undo, or possibly fixed and then re-caused the issue)
+
+               }
              });
-             var qaService = services.keepRight;
+           });
+         } // `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.
+         //
 
-             if (qaService) {
-               qaService.replaceItem(_qaItem); // update keepright cache
-             }
 
-             saveSection.call(qaSaveButtons);
-           }
-         }
+         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 qaSaveButtons(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+             cache.queuedEntityIDs.add(entityID); // Clear caches for existing issues related to this entity
 
-           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
-             return d.status + d.id;
-           }); // exit
+             cache.uncacheEntityID(entityID);
+             return function () {
+               cache.queuedEntityIDs["delete"](entityID);
+               var graph = cache.graph;
+               if (!graph) return; // was reset?
 
-           buttonSection.exit().remove(); // enter
+               var entity = graph.hasEntity(entityID); // Sanity check: don't validate deleted entities
 
-           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
+               if (!entity) return; // detect new issues and update caches
 
-           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 result = validateEntity(entity, graph);
 
-             var qaService = services.keepRight;
+               if (result.provisional) {
+                 // provisional result
+                 cache.provisionalEntityIDs.add(entityID); // we'll need to revalidate this entity again later
+               }
 
-             if (qaService) {
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
-             }
+               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.
+
+           cache.queue = cache.queue.concat(utilArrayChunk(jobs, 100)); // Perform the work
+
+           if (cache.queuePromise) return cache.queuePromise;
+           cache.queuePromise = processQueue(cache).then(function () {
+             return revalidateProvisionalEntities(cache);
+           })["catch"](function () {
+             /* ignore */
+           })["finally"](function () {
+             return cache.queuePromise = null;
            });
-           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
+           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 qaService = services.keepRight;
 
-             if (qaService) {
-               d.newStatus = 'ignore_t'; // ignore temporarily (item fixed)
+         function revalidateProvisionalEntities(cache) {
+           if (!cache.provisionalEntityIDs.size) return; // nothing to do
 
-               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 handle = window.setTimeout(function () {
+             _deferredST["delete"](handle);
 
-             var qaService = services.keepRight;
+             if (!cache.provisionalEntityIDs.size) return; // nothing to do
 
-             if (qaService) {
-               d.newStatus = 'ignore'; // ignore permanently (false positive)
+             validateEntitiesAsync(Array.from(cache.provisionalEntityIDs), cache);
+           }, RETRY);
 
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
-             }
-           });
-         } // NOTE: Don't change method name until UI v3 is merged
+           _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.
+         //
 
 
-         keepRightEditor.error = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return keepRightEditor;
-         };
+         function processQueue(cache) {
+           // console.log(`${cache.which} queue length ${cache.queue.length}`);
+           if (!cache.queue.length) return Promise.resolve(); // we're done
 
-         return utilRebind(keepRightEditor, dispatch$1, 'on');
-       }
+           var chunk = cache.queue.pop();
+           return new Promise(function (resolvePromise) {
+             var handle = window.requestIdleCallback(function () {
+               _deferredRIC["delete"](handle); // const t0 = performance.now();
 
-       function uiOsmoseDetails(context) {
-         var _qaItem;
 
-         function issueString(d, type) {
-           if (!d) return ''; // Issue strings are cached from Osmose API
+               chunk.forEach(function (job) {
+                 return job();
+               }); // const t1 = performance.now();
+               // console.log('chunk processed in ' + (t1 - t0) + ' ms');
 
-           var s = services.osmose.getStrings(d.itemType);
-           return type in s ? s[type] : '';
-         }
+               resolvePromise();
+             });
 
-         function osmoseDetails(selection) {
-           var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
-             return "".concat(d.id, "-").concat(d.status || 0);
+             _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);
            });
-           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').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)
+         }
 
+         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
+       //
 
-           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)
+       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 (issueString(_qaItem, 'fix')) {
-             var _div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+         };
 
-             _div.append('h4').html(_t.html('QA.osmose.fix_title'));
+         cache.cacheIssue = function (issue) {
+           (issue.entityIds || []).forEach(function (entityID) {
+             if (!cache.issuesByEntityID[entityID]) {
+               cache.issuesByEntityID[entityID] = new Set();
+             }
 
-             _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)
+             cache.issuesByEntityID[entityID].add(issue.id);
+           });
+           cache.issuesByIssueID[issue.id] = issue;
+         };
 
+         cache.uncacheIssue = function (issue) {
+           (issue.entityIds || []).forEach(function (entityID) {
+             if (cache.issuesByEntityID[entityID]) {
+               cache.issuesByEntityID[entityID]["delete"](issue.id);
+             }
+           });
+           delete cache.issuesByIssueID[issue.id];
+         };
 
-           if (issueString(_qaItem, 'trap')) {
-             var _div2 = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+         cache.cacheIssues = function (issues) {
+           issues.forEach(cache.cacheIssue);
+         };
 
-             _div2.append('h4').html(_t.html('QA.osmose.trap_title'));
+         cache.uncacheIssues = function (issues) {
+           issues.forEach(cache.uncacheIssue);
+         };
 
-             _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
+         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
 
 
-           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
+         cache.uncacheEntityID = function (entityID) {
+           var entityIssueIDs = cache.issuesByEntityID[entityID];
 
-             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
+           if (entityIssueIDs) {
+             entityIssueIDs.forEach(function (issueID) {
+               var issue = cache.issuesByIssueID[issueID];
 
-             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
+               if (issue) {
+                 cache.uncacheIssue(issue);
+               } else {
+                 // shouldn't happen, clean up
+                 delete cache.issuesByIssueID[issueID];
+               }
+             });
+           }
 
+           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.
+         //
 
-             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
 
-               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');
+         cache.withAllRelatedEntities = function (entityIDs) {
+           var result = new Set();
+           (entityIDs || []).forEach(function (entityID) {
+             result.add(entityID); // include self
 
-                 if (!osmlayer.enabled()) {
-                   osmlayer.enabled(true);
-                 }
+             var entityIssueIDs = cache.issuesByEntityID[entityID];
 
-                 context.map().centerZoom(d.loc, 20);
+             if (entityIssueIDs) {
+               entityIssueIDs.forEach(function (issueID) {
+                 var issue = cache.issuesByIssueID[issueID];
 
-                 if (entity) {
-                   context.enter(modeSelect(context, [entityID]));
-                 } else {
-                   context.loadEntity(entityID, function () {
-                     context.enter(modeSelect(context, [entityID]));
+                 if (issue) {
+                   (issue.entityIds || []).forEach(function (relatedID) {
+                     return result.add(relatedID);
                    });
+                 } else {
+                   // shouldn't happen, clean up
+                   delete cache.issuesByIssueID[issueID];
                  }
-               }); // Replace with friendly name if possible
-               // (The entity may not yet be loaded into the graph)
+               });
+             }
+           });
+           return result;
+         };
+
+         return cache;
+       }
+
+       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');
 
-               if (entity) {
-                 var name = utilDisplayName(entity); // try to use common name
+         uploader.isSaving = function () {
+           return _isSaving;
+         };
 
-                 if (!name) {
-                   var preset = _mainPresetIndex.match(entity, context.graph());
-                   name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
-                 }
+         uploader.save = function (changeset, tryAgain, checkConflicts) {
+           // Guard against accidentally entering save code twice - #4641
+           if (_isSaving && !tryAgain) {
+             return;
+           }
 
-                 if (name) {
-                   this.innerText = name;
-                 }
+           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..
                }
-             }); // Don't hide entities related to this issue - #5880
+             });
+             return;
+           }
 
-             context.features().forceVisible(d.elems);
-             context.map().pan([0, 0]); // trigger a redraw
-           })["catch"](function (err) {
-             console.log(err); // eslint-disable-line no-console
-           });
-         }
+           if (!_isSaving) {
+             _isSaving = true;
+             dispatch.call('saveStarted', this);
+           }
 
-         osmoseDetails.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return osmoseDetails;
-         };
+           var history = context.history();
+           _conflicts = [];
+           _errors = []; // Store original changes, in case user wants to download them as an .osc file
 
-         return osmoseDetails;
-       }
+           _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
 
-       function uiOsmoseHeader() {
-         var _qaItem;
+           if (!tryAgain) {
+             history.perform(actionNoop());
+           } // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`
 
-         function issueTitle(d) {
-           var unknown = _t('inspector.unknown');
-           if (!d) return unknown; // Issue titles supplied by Osmose
 
-           var s = services.osmose.getStrings(d.itemType);
-           return 'title' in s ? s.title : unknown;
-         }
+           if (!checkConflicts) {
+             upload(changeset); // Do the full (slow) conflict check..
+           } else {
+             performFullConflictCheck(changeset);
+           }
+         };
 
-         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;
+         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 = [];
 
-             if (!picon) {
-               return '';
-             } else {
-               var isMaki = /^maki-/.test(picon);
-               return "#".concat(picon).concat(isMaki ? '-11' : '');
+           for (var i = 0; i < summary.length; i++) {
+             var item = summary[i];
+
+             if (item.changeType === 'modified') {
+               _toCheck.push(item.entity.id);
              }
-           });
-           headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
-         }
+           }
 
-         osmoseHeader.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return osmoseHeader;
-         };
+           var _toLoad = withChildNodes(_toCheck, localGraph);
 
-         return osmoseHeader;
-       }
+           var _loaded = {};
+           var _toLoadCount = 0;
+           var _toLoadTotal = _toLoad.length;
 
-       function uiViewOnOsmose() {
-         var _qaItem;
+           if (_toCheck.length) {
+             dispatch.call('progressChanged', this, _toLoadCount, _toLoadTotal);
 
-         function viewOnOsmose(selection) {
-           var url;
+             _toLoad.forEach(function (id) {
+               _loaded[id] = false;
+             });
 
-           if (services.osmose && _qaItem instanceof QAItem) {
-             url = services.osmose.itemURL(_qaItem);
+             osm.loadMultiple(_toLoad, loaded);
+           } else {
+             upload(changeset);
            }
 
-           var link = selection.selectAll('.view-on-osmose').data(url ? [url] : []); // exit
+           return;
 
-           link.exit().remove(); // enter
+           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..
 
-           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;
-         };
+           function loaded(err, result) {
+             if (_errors.length) return;
 
-         return viewOnOsmose;
-       }
+             if (err) {
+               _errors.push({
+                 msg: err.message || err.responseText,
+                 details: [_t('save.status_code', {
+                   code: err.status
+                 })]
+               });
 
-       function uiOsmoseEditor(context) {
-         var dispatch$1 = dispatch('change');
-         var qaDetails = uiOsmoseDetails(context);
-         var qaHeader = uiOsmoseHeader();
+               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..
 
-         var _qaItem;
+                 var i, id;
 
-         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));
-         }
+                 if (entity.type === 'way') {
+                   for (i = 0; i < entity.nodes.length; i++) {
+                     id = entity.nodes[i];
 
-         function osmoseSaveSection(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+                     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;
 
-           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 (_loaded[id] === undefined) {
+                       _loaded[id] = false;
+                       loadMore.push(id);
+                     }
+                   }
+                 }
+               });
+               _toLoadCount += result.data.length;
+               _toLoadTotal += loadMore.length;
+               dispatch.call('progressChanged', this, _toLoadCount, _toLoadTotal);
 
-           saveSection.exit().remove(); // enter
+               if (loadMore.length) {
+                 _toLoad.push.apply(_toLoad, loadMore);
 
-           var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf'); // update
+                 osm.loadMultiple(loadMore, loaded);
+               }
 
-           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
-         }
+               if (!_toLoad.length) {
+                 detectConflicts();
+                 upload(changeset);
+               }
+             }
+           }
 
-         function qaSaveButtons(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+           function detectConflicts() {
+             function choice(id, text, _action) {
+               return {
+                 id: id,
+                 text: text,
+                 action: function action() {
+                   history.replace(_action);
+                 }
+               };
+             }
 
-           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
-             return d.status + d.id;
-           }); // exit
+             function formatUser(d) {
+               return '<a href="' + osm.userURL(d) + '" target="_blank">' + escape$4(d) + '</a>';
+             }
 
-           buttonSection.exit().remove(); // enter
+             function entityName(entity) {
+               return utilDisplayName(entity) || utilDisplayType(entity.id) + ' ' + entity.id;
+             }
 
-           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 sameVersions(local, remote) {
+               if (local.version !== remote.version) return false;
 
-           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
+               if (local.type === 'way') {
+                 var children = utilArrayUnion(local.nodes, remote.nodes);
 
-             var qaService = services.osmose;
+                 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;
+                 }
+               }
 
-             if (qaService) {
-               d.newStatus = 'done';
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
+               return true;
              }
-           });
-           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
-
-             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
+             _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
 
+               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'));
 
-         osmoseEditor.error = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return osmoseEditor;
-         };
+               _conflicts.push({
+                 id: id,
+                 name: entityName(local),
+                 details: mergeConflicts,
+                 chosen: 1,
+                 choices: [choice(id, keepMine, forceLocal), choice(id, keepTheirs, forceRemote)]
+               });
+             });
+           }
+         }
 
-         return utilRebind(osmoseEditor, dispatch$1, 'on');
-       }
+         function upload(changeset) {
+           var osm = context.connection();
 
-       function modeSelectError(context, selectedErrorID, selectedErrorService) {
-         var mode = {
-           id: 'select-error',
-           button: 'browse'
-         };
-         var keybinding = utilKeybinding('select-error');
-         var errorService = services[selectedErrorService];
-         var errorEditor;
+           if (!osm) {
+             _errors.push({
+               msg: 'No OSM Service'
+             });
+           }
 
-         switch (selectedErrorService) {
-           case 'improveOSM':
-             errorEditor = uiImproveOsmEditor(context).on('change', function () {
-               context.map().pan([0, 0]); // trigger a redraw
+           if (_conflicts.length) {
+             didResultInConflicts(changeset);
+           } else if (_errors.length) {
+             didResultInErrors();
+           } else {
+             var history = context.history();
+             var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
 
-               var error = checkSelectedID();
-               if (!error) return;
-               context.ui().sidebar.show(errorEditor.error(error));
-             });
-             break;
+             if (changes.modified.length || changes.created.length || changes.deleted.length) {
+               dispatch.call('willAttemptUpload', this);
+               osm.putChangeset(changeset, changes, uploadCallback);
+             } else {
+               // changes were insignificant or reverted by user
+               didResultInNoChanges();
+             }
+           }
+         }
 
-           case 'keepRight':
-             errorEditor = uiKeepRightEditor(context).on('change', function () {
-               context.map().pan([0, 0]); // trigger a redraw
+         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 error = checkSelectedID();
-               if (!error) return;
-               context.ui().sidebar.show(errorEditor.error(error));
-             });
-             break;
+               didResultInErrors();
+             }
+           } else {
+             didResultInSuccess(changeset);
+           }
+         }
 
-           case 'osmose':
-             errorEditor = uiOsmoseEditor(context).on('change', function () {
-               context.map().pan([0, 0]); // trigger a redraw
+         function didResultInNoChanges() {
+           dispatch.call('resultNoChanges', this);
+           endSave();
+           context.flush(); // reset iD
+         }
 
-               var error = checkSelectedID();
-               if (!error) return;
-               context.ui().sidebar.show(errorEditor.error(error));
-             });
-             break;
+         function didResultInErrors() {
+           context.history().pop();
+           dispatch.call('resultErrors', this, _errors);
+           endSave();
          }
 
-         var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+         function didResultInConflicts(changeset) {
+           _conflicts.sort(function (a, b) {
+             return b.id.localeCompare(a.id);
+           });
 
-         function checkSelectedID() {
-           if (!errorService) return;
-           var error = errorService.getError(selectedErrorID);
+           dispatch.call('resultConflicts', this, changeset, _conflicts, _origChanges);
+           endSave();
+         }
 
-           if (!error) {
-             context.enter(modeBrowse(context));
-           }
+         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
 
-           return error;
+           window.setTimeout(function () {
+             endSave();
+             context.flush(); // reset iD
+           }, 2500);
          }
 
-         mode.zoomToSelected = function () {
-           if (!errorService) return;
-           var error = errorService.getError(selectedErrorID);
+         function endSave() {
+           _isSaving = false;
+           dispatch.call('saveEnded', this);
+         }
 
-           if (error) {
-             context.map().centerZoomEase(error.loc, 20);
-           }
+         uploader.cancelConflictResolution = function () {
+           context.history().pop();
          };
 
-         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
+         uploader.processResolvedConflicts = function (changeset) {
+           var history = context.history();
 
-           function selectError(d3_event, drawn) {
-             if (!checkSelectedID()) return;
-             var selection = context.surface().selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);
+           for (var i = 0; i < _conflicts.length; i++) {
+             if (_conflicts[i].chosen === 1) {
+               // user chose "use theirs"
+               var entity = context.hasEntity(_conflicts[i].id);
 
-             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 (entity && entity.type === 'way') {
+                 var children = utilArrayUniq(entity.nodes);
 
-               if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-                 context.enter(modeBrowse(context));
+                 for (var j = 0; j < children.length; j++) {
+                   history.replace(actionRevert(children[j]));
+                 }
                }
-             } else {
-               selection.classed('selected', true);
-               context.selectedErrorID(selectedErrorID);
+
+               history.replace(actionRevert(_conflicts[i].id));
              }
            }
 
-           function esc() {
-             if (context.container().select('.combobox').size()) return;
-             context.enter(modeBrowse(context));
-           }
+           uploader.save(changeset, true, false); // tryAgain = true, checkConflicts = false
          };
 
-         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([]);
-         };
+         uploader.reset = function () {};
 
-         return mode;
+         return uploader;
        }
 
-       function behaviorSelect(context) {
-         var _tolerancePx = 4; // see also behaviorDrag
+       var $$2 = _export;
+       var fails = fails$V;
+       var expm1 = mathExpm1;
 
-         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
+       var abs = Math.abs;
+       var exp = Math.exp;
+       var E = Math.E;
+
+       var FORCED = fails(function () {
+         // eslint-disable-next-line es/no-math-sinh -- required for testing
+         return Math.sinh(-2e-17) != -2e-17;
+       });
+
+       // `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);
+         }
+       });
+
+       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;
+       });
+
+       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);
+       }
 
-         var _multiselectionPointerId = null; // use pointer events on supported platforms; fallback to mouse events
+       function vintageRange(vintage) {
+         var s;
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+         if (vintage.start || vintage.end) {
+           s = vintage.start || '?';
 
-         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;
+           if (vintage.start !== vintage.end) {
+             s += ' - ' + (vintage.end || '?');
            }
+         }
 
-           if (d3_event.keyCode === 93 || // context menu key
-           d3_event.keyCode === 32) {
-             // spacebar
-             d3_event.preventDefault();
-           }
+         return s;
+       }
 
-           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
+       function rendererBackgroundSource(data) {
+         var source = Object.assign({}, data); // shallow copy
 
-           cancelLongPress();
+         var _offset = [0, 0];
+         var _name = source.name;
+         var _description = source.description;
 
-           if (d3_event.shiftKey) {
-             context.surface().classed('behavior-multiselect', true);
-           }
+         var _best = !!source.best;
 
-           if (d3_event.keyCode === 32) {
-             // spacebar
-             if (!_downPointers.spacebar && _lastMouseEvent) {
-               cancelLongPress();
-               _longPressTimeout = window.setTimeout(didLongPress, 500, 'spacebar', 'spacebar');
-               _downPointers.spacebar = {
-                 firstEvent: _lastMouseEvent,
-                 lastEvent: _lastMouseEvent
-               };
-             }
-           }
-         }
+         var _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;
 
-         function keyup(d3_event) {
-           cancelLongPress();
+         source.tileSize = data.tileSize || 256;
+         source.zoomExtent = data.zoomExtent || [0, 22];
+         source.overzoom = data.overzoom !== false;
 
-           if (!d3_event.shiftKey) {
-             context.surface().classed('behavior-multiselect', false);
-           }
+         source.offset = function (val) {
+           if (!arguments.length) return _offset;
+           _offset = val;
+           return source;
+         };
 
-           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;
+         source.nudge = function (val, zoomlevel) {
+           _offset[0] += val[0] / Math.pow(2, zoomlevel);
+           _offset[1] += val[1] / Math.pow(2, zoomlevel);
+           return source;
+         };
 
-             if (pointer) {
-               delete _downPointers.spacebar;
-               if (pointer.done) return;
-               d3_event.preventDefault();
-               _lastInteractionType = 'spacebar';
-               click(pointer.firstEvent, pointer.lastEvent, 'spacebar');
-             }
-           }
-         }
+         source.name = function () {
+           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+           return _t('imagery.' + id_safe + '.name', {
+             "default": lodash.exports.escape(_name)
+           });
+         };
 
-         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
-           };
-         }
+         source.label = function () {
+           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+           return _t.html('imagery.' + id_safe + '.name', {
+             "default": lodash.exports.escape(_name)
+           });
+         };
 
-         function didLongPress(id, interactionType) {
-           var pointer = _downPointers[id];
-           if (!pointer) return;
+         source.description = function () {
+           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+           return _t.html('imagery.' + id_safe + '.description', {
+             "default": lodash.exports.escape(_description)
+           });
+         };
 
-           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
+         source.best = function () {
+           return _best;
+         };
 
+         source.area = function () {
+           if (!data.polygon) return Number.MAX_VALUE; // worldwide
 
-           _longPressTimeout = null;
-           _lastInteractionType = interactionType;
-           _showMenu = true;
-           click(pointer.firstEvent, pointer.lastEvent, id);
-         }
+           var area = d3_geoArea({
+             type: 'MultiPolygon',
+             coordinates: [data.polygon]
+           });
+           return isNaN(area) ? 0 : area;
+         };
 
-         function pointermove(d3_event) {
-           var id = (d3_event.pointerId || 'mouse').toString();
+         source.imageryUsed = function () {
+           return _name || source.id;
+         };
 
-           if (_downPointers[id]) {
-             _downPointers[id].lastEvent = d3_event;
+         source.template = function (val) {
+           if (!arguments.length) return _template;
+
+           if (source.id === 'custom' || source.id === 'Bing') {
+             _template = val;
            }
 
-           if (!d3_event.pointerType || d3_event.pointerType === 'mouse') {
-             _lastMouseEvent = d3_event;
+           return source;
+         };
 
-             if (_downPointers.spacebar) {
-               _downPointers.spacebar.lastEvent = d3_event;
+         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)
+
+           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';
              }
            }
-         }
 
-         function pointerup(d3_event) {
-           var id = (d3_event.pointerId || 'mouse').toString();
-           var pointer = _downPointers[id];
-           if (!pointer) return;
-           delete _downPointers[id];
+           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 (_multiselectionPointerId === id) {
-             _multiselectionPointerId = null;
-           }
+               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 (pointer.done) return;
-           click(pointer.firstEvent, d3_event, id);
-         }
+               switch (source.projection) {
+                 case 'EPSG:4326':
+                   return {
+                     x: lon * 180 / Math.PI,
+                     y: lat * 180 / Math.PI
+                   };
 
-         function pointercancel(d3_event) {
-           var id = (d3_event.pointerId || 'mouse').toString();
-           if (!_downPointers[id]) return;
-           delete _downPointers[id];
+                 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]
+                   };
+               }
+             };
 
-           if (_multiselectionPointerId === id) {
-             _multiselectionPointerId = null;
-           }
-         }
+             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;
 
-         function contextmenu(d3_event) {
-           d3_event.preventDefault();
+                 case 'proj':
+                   return projection;
 
-           if (!+d3_event.clientX && !+d3_event.clientY) {
-             if (_lastMouseEvent) {
-               d3_event.sourceEvent = _lastMouseEvent;
-             } else {
-               return;
-             }
-           } else {
-             _lastMouseEvent = d3_event;
-             _lastInteractionType = 'rightclick';
-           }
+                 case 'wkid':
+                   return projection.replace(/^EPSG:/, '');
 
-           _showMenu = true;
-           click(d3_event, d3_event);
-         }
+                 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;
+                   }
 
-         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.
+                 case 'w':
+                   return minXmaxY.x;
 
-           var pointGetter = utilFastMouse(mapNode);
-           var p1 = pointGetter(firstEvent);
-           var p2 = pointGetter(lastEvent);
-           var dist = geoVecLength(p1, p2);
+                 case 's':
+                   return maxXminY.y;
 
-           if (dist > _tolerancePx || !mapContains(lastEvent)) {
-             resetProperties();
-             return;
-           }
+                 case 'n':
+                   return maxXminY.x;
 
-           var targetDatum = lastEvent.target.__data__;
-           var multiselectEntityId;
+                 case 'e':
+                   return minXmaxY.y;
 
-           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);
+                 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 = '';
 
-             if (selectPointerInfo) {
-               _multiselectionPointerId = selectPointerInfo.pointerId; // if the other feature isn't selected yet, make sure we select it
+               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();
+               }
 
-               multiselectEntityId = !selectPointerInfo.selected && selectPointerInfo.entityId;
-               _downPointers[selectPointerInfo.pointerId].done = true;
-             }
-           } // support multiselect if data is already selected
+               return u;
+             });
+           } // these apply to any type..
 
 
-           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);
+           result = result.replace(/\{switch:([^}]+)\}/, function (s, r) {
+             var subdomains = r.split(',');
+             return subdomains[(coord[0] + coord[1]) % subdomains.length];
+           });
+           return result;
+         };
 
-           processClick(targetDatum, isMultiselect, p2, multiselectEntityId);
+         source.validZoom = function (z) {
+           return source.zoomExtent[0] <= z && (source.overzoom || source.zoomExtent[1] > z);
+         };
 
-           function mapContains(event) {
-             var rect = mapNode.getBoundingClientRect();
-             return event.clientX >= rect.left && event.clientX <= rect.right && event.clientY >= rect.top && event.clientY <= rect.bottom;
-           }
+         source.isLocatorOverlay = function () {
+           return source.id === 'mapbox_locator_overlay';
+         };
+         /* hides a source from the list, but leaves it available for use */
 
-           function pointerDownOnSelection(skipPointerId) {
-             var mode = context.mode();
-             var selectedIDs = mode.id === 'select' ? mode.selectedIDs() : [];
 
-             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
-               };
-             }
+         source.isHidden = function () {
+           return source.id === 'DigitalGlobe-Premium-vintage' || source.id === 'DigitalGlobe-Standard-vintage';
+         };
 
-             return null;
-           }
-         }
+         source.copyrightNotices = function () {};
 
-         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;
+         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 (datum && datum.type === 'midpoint') {
-             // treat targeting midpoints as if targeting the parent way
-             datum = datum.parents[0];
-           }
+         return source;
+       }
 
-           var newMode;
+       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
 
-           if (datum instanceof osmEntity) {
-             // targeting an entity
-             var selectedIDs = context.selectedIDs();
-             context.selectedNoteID(null);
-             context.selectedErrorID(null);
+         var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q'; // iD
 
-             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
+         /*
+         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
+         */
 
-                 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 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
 
-             if (!isMultiselect && mode.id !== 'browse') {
-               context.enter(modeBrowse(context));
-             }
+           var template = imageryResource.imageUrl; //https://ecn.{subdomain}.tiles.virtualearth.net/tiles/a{quadkey}.jpeg?g=10339
+
+           var subDomains = imageryResource.imageUrlSubdomains; //["t0, t1, t2, t3"]
+
+           var subDomainNumbers = subDomains.map(function (subDomain) {
+             return subDomain.substring(1);
+           }).join(',');
+           template = template.replace('{subdomain}', "t{switch:".concat(subDomainNumbers, "}")).replace('{quadkey}', '{u}');
+
+           if (!new URLSearchParams(template).has(strictParam)) {
+             template += "&".concat(strictParam, "=z");
            }
 
-           context.ui().closeEditMenu(); // always request to show the edit menu in case the mode needs it
+           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]])
+                 };
+               })
+             };
+           });
+           dispatch.call('change');
+         })["catch"](function () {
+           /* ignore */
+         });
 
-           if (showMenu) context.ui().showEditMenu(point, interactionType);
-           resetProperties();
-         }
+         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(', ');
+         };
 
-         function cancelLongPress() {
-           if (_longPressTimeout) window.clearTimeout(_longPressTimeout);
-           _longPressTimeout = null;
-         }
+         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
 
-         function resetProperties() {
-           cancelLongPress();
-           _showMenu = false;
-           _lastInteractionType = null; // don't reset _lastMouseEvent since it might still be useful
-         }
+           var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint + '?zl=' + zoom + '&key=' + key;
+           if (inflight[tileID]) return;
 
-         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 (!cache[tileID]) {
+             cache[tileID] = {};
+           }
 
-             if (+e.clientX === 0 && +e.clientY === 0) {
-               d3_event.preventDefault();
+           if (cache[tileID] && cache[tileID].metadata) {
+             return callback(null, cache[tileID].metadata);
+           }
+
+           inflight[tileID] = true;
+           d3_json(url).then(function (result) {
+             delete inflight[tileID];
+
+             if (!result) {
+               throw new Error('Unknown Error');
              }
-           });
-           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);
+             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 behavior;
-       }
+         bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
+         return bing;
+       };
 
-       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.
+       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';
+         }
 
-         var _nodeIndex;
+         var esri = rendererBackgroundSource(data);
+         var cache = {};
+         var inflight = {};
 
-         var _origWay;
+         var _prevCenter; // use a tilemap service to set maximum zoom for esri tiles dynamically
+         // https://developers.arcgis.com/documentation/tiled-elevation-service/
 
-         var _wayGeometry;
 
-         var _headNodeID;
+         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
 
-         var _annotation;
+           var z = 20; // first generate a random url using the template
 
-         var _pointerHasMoved = false; // The osmNode to be placed.
-         // This is temporary and just follows the mouse cursor until an "add" event occurs.
+           var dummyUrl = esri.url([1, 2, 3]); // calculate url z/y/x from the lat/long of the center of the map
 
-         var _drawNode;
+           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 _didResolveTempEdit = false;
+           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
 
-         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();
-         }
+           d3_json(tilemapUrl).then(function (tilemap) {
+             if (!tilemap) {
+               throw new Error('Unknown Error');
+             }
 
-         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();
-         }
+             var hasTiles = true;
 
-         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 < 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
 
-             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);
-             }
+             esri.zoomExtent[1] = hasTiles ? 22 : 19;
+           })["catch"](function () {
+             /* ignore */
+           });
+         };
 
-             context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
+         esri.getMetadata = function (center, tileCoord, callback) {
+           if (esri.id !== 'EsriWorldImagery') {
+             // rest endpoint is not available for ESRI's "clarity" imagery
+             return callback(null, {});
            }
-         }
-
-         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()`
 
+           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)
 
-         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;
+           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
 
-           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 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';
 
-             if (choice) {
-               loc = choice.loc;
-             }
+           if (!cache[tileID]) {
+             cache[tileID] = {};
            }
 
-           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 (cache[tileID] && cache[tileID].metadata) {
+             return callback(null, cache[tileID].metadata);
+           }
 
-         function checkGeometry(includeDrawNode) {
-           var nopeDisabled = context.surface().classed('nope-disabled');
-           var isInvalid = isInvalidGeometry(includeDrawNode);
+           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 (nopeDisabled) {
-             context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
-           } else {
-             context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
-           }
-         }
+             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
 
-         function isInvalidGeometry(includeDrawNode) {
-           var testNode = _drawNode; // we only need to test the single way we're drawing
 
-           var parentWay = context.graph().entity(wayID);
-           var nodes = context.graph().childNodes(parentWay).slice(); // shallow copy
+             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 (includeDrawNode) {
-             if (parentWay.isClosed()) {
-               // don't test the last segment for closed ways - #4655
-               // (still test the first segment)
-               nodes.pop();
+             if (isFinite(metadata.resolution)) {
+               metadata.resolution += ' m';
              }
-           } 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;
+
+             if (isFinite(metadata.accuracy)) {
+               metadata.accuracy += ' m';
              }
-           }
 
-           return testNode && geoHasSelfIntersections(nodes, testNode.id);
-         }
+             cache[tileID].metadata = metadata;
+             if (callback) callback(null, metadata);
+           })["catch"](function (err) {
+             delete inflight[tileID];
+             if (callback) callback(err.message);
+           });
 
-         function undone() {
-           // undoing removed the temp edit
-           _didResolveTempEdit = true;
-           context.pauseChangeDispatch();
-           var nextMode;
+           function clean(val) {
+             return String(val).trim() || unknown;
+           }
+         };
 
-           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
+         return esri;
+       };
 
-             nextMode = mode;
-           } // clear the redo stack by adding and removing a blank edit
+       rendererBackgroundSource.None = function () {
+         var source = rendererBackgroundSource({
+           id: 'none',
+           template: ''
+         });
 
+         source.name = function () {
+           return _t('background.none');
+         };
 
-           context.perform(actionNoop());
-           context.pop(1);
-           context.resumeChangeDispatch();
-           context.enter(nextMode);
-         }
+         source.label = function () {
+           return _t.html('background.none');
+         };
 
-         function setActiveElements() {
-           if (!_drawNode) return;
-           context.surface().selectAll('.' + _drawNode.id).classed('active', true);
-         }
+         source.imageryUsed = function () {
+           return null;
+         };
 
-         function resetToStartGraph() {
-           while (context.graph() !== startGraph) {
-             context.pop();
-           }
-         }
+         source.area = function () {
+           return -1; // sources in background pane are sorted by area
+         };
 
-         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 source;
+       };
 
-           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);
-         };
+       rendererBackgroundSource.Custom = function (template) {
+         var source = rendererBackgroundSource({
+           id: 'custom',
+           template: template
+         });
 
-         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();
-           }
+         source.name = function () {
+           return _t('background.custom');
+         };
 
-           _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);
+         source.label = function () {
+           return _t.html('background.custom');
          };
 
-         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);
-           }
+         source.imageryUsed = function () {
+           // sanitize personal connection tokens - #6801
+           var cleaned = source.template(); // from query string parameters
 
-           checkGeometry(true
-           /* includeDrawNode */
-           );
+           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
 
-           if (d && d.properties && d.properties.nope || context.surface().classed('nope')) {
-             if (!_pointerHasMoved) {
-               // prevent the temporary draw node from appearing on touch devices
-               removeDrawNode();
-             }
 
-             dispatch$1.call('rejectedSelfIntersection', this);
-             return; // can't click here
-           }
+           cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
+           return 'Custom (' + cleaned + ' )';
+         };
 
-           context.pauseChangeDispatch();
-           doAdd(); // we just replaced the temporary edit with the real one
+         source.area = function () {
+           return -2; // sources in background pane are sorted by area
+         };
 
-           _didResolveTempEdit = true;
-           context.resumeChangeDispatch();
-           context.enter(mode);
-         } // Accept the current position of the drawing node
+         return source;
+       };
+
+       function rendererTileLayer(context) {
+         var transformProp = utilPrefixCSSProperty('Transform');
+         var tiler = utilTiler();
+         var _tileSize = 256;
 
+         var _projection;
 
-         drawWay.add = function (loc, d) {
-           attemptAdd(d, loc, function () {// don't need to do anything extra
-           });
-         }; // Connect the way to an existing way
+         var _cache = {};
 
+         var _tileOrigin;
 
-         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
+         var _zoom;
 
+         var _source;
 
-         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 tileSizeAtZoom(d, z) {
+           var EPSILON = 0.002; // close seams
 
-           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.
+           return _tileSize * Math.pow(2, z - d[2]) / _tileSize + EPSILON;
+         }
 
+         function atZoom(t, distance) {
+           var power = Math.pow(2, distance);
+           return [Math.floor(t[0] * power), Math.floor(t[1] * power), t[2] + distance];
+         }
 
-         drawWay.finish = function () {
-           checkGeometry(false
-           /* includeDrawNode */
-           );
+         function lookUp(d) {
+           for (var up = -1; up > -d[2]; up--) {
+             var tile = atZoom(d, up);
 
-           if (context.surface().classed('nope')) {
-             dispatch$1.call('rejectedSelfIntersection', this);
-             return; // can't click here
+             if (_cache[_source.url(tile)] !== false) {
+               return tile;
+             }
            }
+         }
 
-           context.pauseChangeDispatch(); // remove the temporary edit
-
-           context.pop(1);
-           _didResolveTempEdit = true;
-           context.resumeChangeDispatch();
-           var way = context.hasEntity(wayID);
+         function uniqueBy(a, n) {
+           var o = [];
+           var seen = {};
 
-           if (!way || way.isDegenerate()) {
-             drawWay.cancel();
-             return;
+           for (var i = 0; i < a.length; i++) {
+             if (seen[a[i][n]] === undefined) {
+               o.push(a[i]);
+               seen[a[i][n]] = 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 o;
+         }
 
+         function addSource(d) {
+           d.push(_source.url(d));
+           return d;
+         } // Update tiles based on current state of `projection`.
 
-         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));
-         };
 
-         drawWay.nodeIndex = function (val) {
-           if (!arguments.length) return _nodeIndex;
-           _nodeIndex = val;
-           return drawWay;
-         };
+         function background(selection) {
+           _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
+           var pixelOffset;
 
-         drawWay.activeID = function () {
-           if (!arguments.length) return _drawNode && _drawNode.id; // no assign
+           if (_source) {
+             pixelOffset = [_source.offset()[0] * Math.pow(2, _zoom), _source.offset()[1] * Math.pow(2, _zoom)];
+           } else {
+             pixelOffset = [0, 0];
+           }
 
-           return drawWay;
-         };
+           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).
 
-         return utilRebind(drawWay, dispatch$1, 'on');
-       }
 
-       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('self_intersection.error.lines'))();
-         });
-         mode.wayID = wayID;
-         mode.isContinuing = continuing;
+         function render(selection) {
+           if (!_source) return;
+           var requests = [];
+           var showDebug = context.getDebug('tile') && !_source.overlay;
 
-         mode.enter = function () {
-           behavior.nodeIndex(affix === 'prefix' ? 0 : undefined);
-           context.install(behavior);
-         };
+           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
 
-         mode.exit = function () {
-           context.uninstall(behavior);
-         };
+               requests.push(d);
 
-         mode.selectedIDs = function () {
-           return [wayID];
-         };
+               if (_cache[d[3]] === false && lookUp(d)) {
+                 requests.push(addSource(lookUp(d)));
+               }
+             });
+             requests = uniqueBy(requests, 3).filter(function (r) {
+               // don't re-request tiles which have failed in the past
+               return _cache[r[3]] !== false;
+             });
+           }
 
-         mode.activeID = function () {
-           return behavior && behavior.activeID() || [];
-         };
+           function load(d3_event, d) {
+             _cache[d[3]] = true;
+             select(this).on('error', null).on('load', null).classed('tile-loaded', true);
+             render(selection);
+           }
 
-         return mode;
-       }
+           function error(d3_event, d) {
+             _cache[d[3]] = false;
+             select(this).on('error', null).on('load', null).remove();
+             render(selection);
+           }
 
-       function operationContinue(context, selectedIDs) {
-         var _entities = selectedIDs.map(function (id) {
-           return context.graph().entity(id);
-         });
+           function imageTransform(d) {
+             var ts = _tileSize * Math.pow(2, _zoom - d[2]);
 
-         var _geometries = Object.assign({
-           line: [],
-           vertex: []
-         }, utilArrayGroupBy(_entities, function (entity) {
-           return entity.geometry(context.graph());
-         }));
+             var scale = tileSizeAtZoom(d, _zoom);
+             return 'translate(' + (d[0] * ts - _tileOrigin[0]) + 'px,' + (d[1] * ts - _tileOrigin[1]) + 'px) ' + 'scale(' + scale + ',' + scale + ')';
+           }
 
-         var _vertex = _geometries.vertex.length && _geometries.vertex[0];
+           function tileCenter(d) {
+             var ts = _tileSize * Math.pow(2, _zoom - d[2]);
 
-         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);
-           }) : [];
-         }
+             return [d[0] * ts - _tileOrigin[0] + ts / 2, d[1] * ts - _tileOrigin[1] + ts / 2];
+           }
 
-         var _candidates = candidateWays();
+           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)
 
-         var operation = function operation() {
-           var candidate = _candidates[0];
-           context.enter(modeDrawLine(context, candidate.id, context.graph(), 'line', candidate.affix(_vertex.id), true));
-         };
 
-         operation.relatedEntityIds = function () {
-           return _candidates.length ? [_candidates[0].id] : [];
-         };
+           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);
 
-         operation.available = function () {
-           return _geometries.vertex.length === 1 && _geometries.line.length <= 1 && !context.features().hasHiddenConnections(_vertex, context.graph());
-         };
+             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();
 
-         operation.disabled = function () {
-           if (_candidates.length === 0) {
-             return 'not_eligible';
-           } else if (_candidates.length > 1) {
-             return 'multiple';
+           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'));
+                 }
+               });
+             });
            }
+         }
 
-           return false;
+         background.projection = function (val) {
+           if (!arguments.length) return _projection;
+           _projection = val;
+           return background;
          };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.continue.' + disable) : _t('operations.continue.description');
+         background.dimensions = function (val) {
+           if (!arguments.length) return tiler.size();
+           tiler.size(val);
+           return background;
          };
 
-         operation.annotation = function () {
-           return _t('operations.continue.annotation.line');
+         background.source = function (val) {
+           if (!arguments.length) return _source;
+           _source = val;
+           _tileSize = _source.tileSize;
+           _cache = {};
+           tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
+           return background;
          };
 
-         operation.id = 'continue';
-         operation.keys = [_t('operations.continue.key')];
-         operation.title = _t('operations.continue.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
+         return background;
        }
 
-       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
-
-             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;
+       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;
 
-           for (i = 0; i < selected.relation.length; i++) {
-             entity = selected.relation[i];
+         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
 
-             if (!skip[entity.id] && entity.isComplete(graph)) {
-               canCopy.push(entity.id);
-               skip = getDescendants(entity.id, graph, skip);
-             }
-           }
+             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]] ]
 
-           for (i = 0; i < selected.way.length; i++) {
-             entity = selected.way[i];
+               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
 
-             if (!skip[entity.id]) {
-               canCopy.push(entity.id);
-               skip = getDescendants(entity.id, graph, skip);
-             }
-           }
+             _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'
 
-           for (i = 0; i < selected.node.length; i++) {
-             entity = selected.node[i];
+             _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None()); // Add 'Custom'
 
-             if (!skip[entity.id]) {
-               canCopy.push(entity.id);
-             }
-           }
 
-           context.copyIDs(canCopy);
+             var template = corePreferences('background-custom-template') || '';
+             var custom = rendererBackgroundSource.Custom(template);
 
-           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);
-           }
-         };
+             _imageryIndex.backgrounds.unshift(custom);
 
-         function groupEntities(ids, graph) {
-           var entities = ids.map(function (id) {
-             return graph.entity(id);
+             return _imageryIndex;
            });
-           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 = [];
-           }
+         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
 
-           for (var i = 0; i < children.length; i++) {
-             if (!descendants[children[i]]) {
-               descendants[children[i]] = true;
-               descendants = getDescendants(children[i], graph, descendants);
+           if (context.map().zoom() > 18) {
+             if (currSource && /^EsriWorldImagery/.test(currSource.id)) {
+               var center = context.map().center();
+               currSource.fetchTilemap(center);
              }
-           }
-
-           return descendants;
-         }
+           } // Is the imagery valid here? - #4827
 
-         operation.available = function () {
-           return getFilteredIdsToCopy().length > 0;
-         };
 
-         operation.disabled = function () {
-           var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());
+           var sources = background.sources(context.map().extent());
+           var wasValid = _isValid;
+           _isValid = !!sources.filter(function (d) {
+             return d === currSource;
+           }).length;
 
-           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-             return 'too_large';
+           if (wasValid !== _isValid) {
+             // change in valid status
+             background.updateImagery();
            }
 
-           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();
-         };
-
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.copy.' + disable, {
-             n: selectedIDs.length
-           }) : _t('operations.copy.description', {
-             n: selectedIDs.length
-           });
-         };
+           var baseFilter = '';
 
-         operation.annotation = function () {
-           return _t('operations.copy.annotation', {
-             n: selectedIDs.length
-           });
-         };
+           if (detected.cssfilters) {
+             if (_brightness !== 1) {
+               baseFilter += " brightness(".concat(_brightness, ")");
+             }
 
-         var _point;
+             if (_contrast !== 1) {
+               baseFilter += " contrast(".concat(_contrast, ")");
+             }
 
-         operation.point = function (val) {
-           _point = val;
-           return operation;
-         };
+             if (_saturation !== 1) {
+               baseFilter += " saturate(".concat(_saturation, ")");
+             }
 
-         operation.id = 'copy';
-         operation.keys = [uiCmd('⌘C')];
-         operation.title = _t('operations.copy.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+             if (_sharpness < 1) {
+               // gaussian blur
+               var blur = d3_interpolateNumber(0.5, 5)(1 - _sharpness);
+               baseFilter += " blur(".concat(blur, "px)");
+             }
+           }
 
-       function operationDisconnect(context, selectedIDs) {
-         var _vertexIDs = [];
-         var _wayIDs = [];
-         var _otherIDs = [];
-         var _actions = [];
-         selectedIDs.forEach(function (id) {
-           var entity = context.entity(id);
+           var base = selection.selectAll('.layer-background').data([0]);
+           base = base.enter().insert('div', '.layer-data').attr('class', 'layer layer-background').merge(base);
 
-           if (entity.type === 'way') {
-             _wayIDs.push(id);
-           } else if (entity.geometry(context.graph()) === 'vertex') {
-             _vertexIDs.push(id);
+           if (detected.cssfilters) {
+             base.style('filter', baseFilter || null);
            } else {
-             _otherIDs.push(id);
+             base.style('opacity', _brightness);
            }
-         });
-
-         var _coords,
-             _descriptionID = '',
-             _annotationID = 'features';
 
-         var _disconnectingVertexIds = [];
-         var _disconnectingWayIds = [];
+           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 (_vertexIDs.length > 0) {
-           // At the selected vertices, disconnect the selected ways, if any, else
-           // disconnect all connected ways
-           _disconnectingVertexIds = _vertexIDs;
+           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, ")");
+           }
 
-           _vertexIDs.forEach(function (vertexID) {
-             var action = actionDisconnect(vertexID);
+           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);
+           });
+         }
 
-             if (_wayIDs.length > 0) {
-               var waysIDsForVertex = _wayIDs.filter(function (wayID) {
-                 var way = context.entity(wayID);
-                 return way.nodes.indexOf(vertexID) !== -1;
-               });
+         background.updateImagery = function () {
+           var currSource = baseLayer.source();
+           if (context.inIntro() || !currSource) return;
 
-               action.limitWays(waysIDsForVertex);
-             }
+           var o = _overlayLayers.filter(function (d) {
+             return !d.source().isLocatorOverlay() && !d.source().isHidden();
+           }).map(function (d) {
+             return d.source().id;
+           }).join(',');
 
-             _actions.push(action);
+           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;
 
-             _disconnectingWayIds = _disconnectingWayIds.concat(context.graph().parentWays(context.graph().entity(vertexID)).map(function (d) {
-               return d.id;
-             }));
-           });
+           if (id === 'custom') {
+             id = "custom:".concat(currSource.template());
+           }
 
-           _disconnectingWayIds = utilArrayUniq(_disconnectingWayIds).filter(function (id) {
-             return _wayIDs.indexOf(id) === -1;
-           });
-           _descriptionID += _actions.length === 1 ? 'single_point.' : 'multiple_points.';
+           if (id) {
+             hash.background = id;
+           } else {
+             delete hash.background;
+           }
 
-           if (_wayIDs.length === 1) {
-             _descriptionID += 'single_way.' + context.graph().geometry(_wayIDs[0]);
+           if (o) {
+             hash.overlays = o;
            } else {
-             _descriptionID += _wayIDs.length === 0 ? 'no_ways' : 'multiple_ways';
+             delete hash.overlays;
            }
-         } 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
+           if (Math.abs(x) > EPSILON || Math.abs(y) > EPSILON) {
+             hash.offset = "".concat(x, ",").concat(y);
+           } else {
+             delete hash.offset;
+           }
 
-           var sharedActions = [];
-           var sharedNodes = []; // actions for connected nodes
+           if (!window.mocha) {
+             window.location.replace('#' + utilQsString(hash, true));
+           }
 
-           var unsharedActions = [];
-           var unsharedNodes = [];
-           nodes.forEach(function (node) {
-             var action = actionDisconnect(node.id).limitWays(_wayIDs);
+           var imageryUsed = [];
+           var photoOverlaysUsed = [];
+           var currUsed = currSource.imageryUsed();
 
-             if (action.disabled(context.graph()) !== 'not_connected') {
-               var count = 0;
+           if (currUsed && _isValid) {
+             imageryUsed.push(currUsed);
+           }
 
-               for (var i in ways) {
-                 var way = ways[i];
+           _overlayLayers.filter(function (d) {
+             return !d.source().isLocatorOverlay() && !d.source().isHidden();
+           }).forEach(function (d) {
+             return imageryUsed.push(d.source().imageryUsed());
+           });
 
-                 if (way.nodes.indexOf(node.id) !== -1) {
-                   count += 1;
-                 }
+           var dataLayer = context.layers().layer('data');
 
-                 if (count > 1) break;
-               }
+           if (dataLayer && dataLayer.enabled() && dataLayer.hasData()) {
+             imageryUsed.push(dataLayer.getSrc());
+           }
 
-               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.';
+           var photoOverlayLayers = {
+             streetside: 'Bing Streetside',
+             mapillary: 'Mapillary Images',
+             'mapillary-map-features': 'Mapillary Map Features',
+             'mapillary-signs': 'Mapillary Signs',
+             kartaview: 'KartaView Images'
+           };
 
-           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;
-             });
+           for (var layerID in photoOverlayLayers) {
+             var layer = context.layers().layer(layerID);
 
-             if (_wayIDs.length === 1) {
-               _descriptionID += context.graph().geometry(_wayIDs[0]);
-             } else {
-               _descriptionID += 'separate';
+             if (layer && layer.enabled()) {
+               photoOverlaysUsed.push(layerID);
+               imageryUsed.push(photoOverlayLayers[layerID]);
              }
            }
-         }
 
-         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();
+           context.history().imageryUsed(imageryUsed);
+           context.history().photoOverlaysUsed(photoOverlaysUsed);
          };
 
-         operation.relatedEntityIds = function () {
-           if (_vertexIDs.length) {
-             return _disconnectingWayIds;
-           }
+         background.sources = function (extent, zoom, includeCurrent) {
+           if (!_imageryIndex) return []; // called before init()?
 
-           return _disconnectingVertexIds;
-         };
+           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.
 
-         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;
-         };
+           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];
+           });
 
-         operation.disabled = function () {
-           var reason;
+           if (blocklistChanged) {
+             _imageryIndex.backgrounds.forEach(function (source) {
+               source.isBlocked = blocklists.some(function (regex) {
+                 return regex.test(source.template());
+               });
+             });
 
-           for (var actionIndex in _actions) {
-             reason = _actions[actionIndex].disabled(context.graph());
-             if (reason) return reason;
+             _checkedBlocklists = blocklists.map(function (regex) {
+               return String(regex);
+             });
            }
 
-           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 _imageryIndex.backgrounds.filter(function (source) {
+             if (includeCurrent && currSource === source) return true; // optionally always include the current imagery
 
-           return false;
+             if (source.isBlocked) return false; // even bundled sources may be blocked - #7905
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
+             if (!source.polygon) return true; // always include imagery with worldwide coverage
 
-             if (osm) {
-               var missing = _coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+             if (zoom && zoom < 6) return false; // optionally exclude local imagery at low zooms
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
-               }
-             }
+             return visible[source.id]; // include imagery visible in given extent
+           });
+         };
 
-             return false;
-           }
+         background.dimensions = function (val) {
+           if (!val) return;
+           baseLayer.dimensions(val);
+
+           _overlayLayers.forEach(function (layer) {
+             return layer.dimensions(val);
+           });
          };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
+         background.baseLayerSource = function (d) {
+           if (!arguments.length) return baseLayer.source(); // test source against OSM imagery blocklists..
 
-           if (disable) {
-             return _t('operations.disconnect.' + disable);
+           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.
+
+
+           if (!tested) {
+             regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
+             fail = regex.test(template);
            }
 
-           return _t('operations.disconnect.description.' + _descriptionID);
+           baseLayer.source(!fail ? d : background.findSource('none'));
+           dispatch.call('change');
+           background.updateImagery();
+           return background;
          };
 
-         operation.annotation = function () {
-           return _t('operations.disconnect.annotation.' + _annotationID);
-         };
+         background.findSource = function (id) {
+           if (!id || !_imageryIndex) return null; // called before init()?
 
-         operation.id = 'disconnect';
-         operation.keys = [_t('operations.disconnect.key')];
-         operation.title = _t('operations.disconnect.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+           return _imageryIndex.backgrounds.find(function (d) {
+             return d.id && d.id === id;
+           });
+         };
 
-       function operationDowngrade(context, selectedIDs) {
-         var _affectedFeatureCount = 0;
+         background.bing = function () {
+           background.baseLayerSource(background.findSource('Bing'));
+         };
 
-         var _downgradeType = downgradeTypeForEntityIDs(selectedIDs);
+         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;
+           });
+         };
 
-         var _multi = _affectedFeatureCount === 1 ? 'single' : 'multiple';
+         background.overlayLayerSources = function () {
+           return _overlayLayers.map(function (layer) {
+             return layer.source();
+           });
+         };
 
-         function downgradeTypeForEntityIDs(entityIds) {
-           var downgradeType;
-           _affectedFeatureCount = 0;
+         background.toggleOverlayLayer = function (d) {
+           var layer;
 
-           for (var i in entityIds) {
-             var entityID = entityIds[i];
-             var type = downgradeTypeForEntityID(entityID);
+           for (var i = 0; i < _overlayLayers.length; i++) {
+             layer = _overlayLayers[i];
 
-             if (type) {
-               _affectedFeatureCount += 1;
+             if (layer.source() === d) {
+               _overlayLayers.splice(i, 1);
 
-               if (downgradeType && type !== downgradeType) {
-                 if (downgradeType !== 'generic' && type !== 'generic') {
-                   downgradeType = 'building_address';
-                 } else {
-                   downgradeType = 'generic';
-                 }
-               } else {
-                 downgradeType = type;
-               }
+               dispatch.call('change');
+               background.updateImagery();
+               return;
              }
            }
 
-           return downgradeType;
-         }
+           layer = rendererTileLayer(context).source(d).projection(context.projection).dimensions(baseLayer.dimensions());
 
-         function downgradeTypeForEntityID(entityID) {
-           var graph = context.graph();
-           var entity = graph.entity(entityID);
-           var preset = _mainPresetIndex.match(entity, graph);
-           if (!preset || preset.isFallback()) return null;
+           _overlayLayers.push(layer);
 
-           if (entity.type === 'node' && preset.id !== 'address' && Object.keys(entity.tags).some(function (key) {
-             return key.match(/^addr:.{1,}/);
-           })) {
-             return 'address';
+           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();
            }
 
-           var geometry = entity.geometry(graph);
+           return background;
+         };
 
-           if (geometry === 'area' && entity.tags.building && !preset.tags.building) {
-             return 'building';
+         background.offset = function (d) {
+           var currSource = baseLayer.source();
+
+           if (!arguments.length) {
+             return currSource && currSource.offset() || [0, 0];
            }
 
-           if (geometry === 'vertex' && Object.keys(entity.tags).length) {
-             return 'generic';
+           if (currSource) {
+             currSource.offset(d);
+             dispatch.call('change');
+             background.updateImagery();
            }
 
-           return null;
-         }
+           return background;
+         };
 
-         var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
-         var addressKeysToKeep = ['source'];
+         background.brightness = function (d) {
+           if (!arguments.length) return _brightness;
+           _brightness = d;
+           if (context.mode()) dispatch.call('change');
+           return background;
+         };
 
-         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
+         background.contrast = function (d) {
+           if (!arguments.length) return _contrast;
+           _contrast = d;
+           if (context.mode()) dispatch.call('change');
+           return background;
+         };
 
-               for (var key in tags) {
-                 if (type === 'address' && addressKeysToKeep.indexOf(key) !== -1) continue;
+         background.saturation = function (d) {
+           if (!arguments.length) return _saturation;
+           _saturation = d;
+           if (context.mode()) dispatch.call('change');
+           return background;
+         };
 
-                 if (type === 'building') {
-                   if (buildingKeysToKeep.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
-                 }
+         background.sharpness = function (d) {
+           if (!arguments.length) return _sharpness;
+           _sharpness = d;
+           if (context.mode()) dispatch.call('change');
+           return background;
+         };
 
-                 if (type !== 'generic') {
-                   if (key.match(/^addr:.{1,}/) || key.match(/^source:.{1,}/)) continue;
-                 }
+         var _loadPromise;
 
-                 delete tags[key];
-               }
+         background.ensureLoaded = function () {
+           if (_loadPromise) return _loadPromise;
 
-               graph = actionChangeTags(entityID, tags)(graph);
-             }
+           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
+           }
 
-             return graph;
-           }, operation.annotation());
-           context.validator().validate(); // refresh the select mode to enable the delete operation
+           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;
 
-           context.enter(modeSelect(context, selectedIDs));
-         };
+             if (!requested && extent) {
+               best = background.sources(extent).find(function (s) {
+                 return s.best();
+               });
+             } // Decide which background layer to display
 
-         operation.available = function () {
-           return _downgradeType;
-         };
 
-         operation.disabled = function () {
-           if (selectedIDs.some(hasWikidataTag)) {
-             return 'has_wikidata_tag';
-           }
+             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'));
+             }
 
-           return false;
+             var locator = imageryIndex.backgrounds.find(function (d) {
+               return d.overlay && d["default"];
+             });
 
-           function hasWikidataTag(id) {
-             var entity = context.entity(id);
-             return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
-           }
-         };
+             if (locator) {
+               background.toggleOverlayLayer(locator);
+             }
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.downgrade.' + disable + '.' + _multi) : _t('operations.downgrade.description.' + _downgradeType);
-         };
+             var overlays = (hash.overlays || '').split(',');
+             overlays.forEach(function (overlay) {
+               overlay = background.findSource(overlay);
 
-         operation.annotation = function () {
-           var suffix;
+               if (overlay) {
+                 background.toggleOverlayLayer(overlay);
+               }
+             });
 
-           if (_downgradeType === 'building_address') {
-             suffix = 'generic';
-           } else {
-             suffix = _downgradeType;
-           }
+             if (hash.gpx) {
+               var gpx = context.layers().layer('data');
 
-           return _t('operations.downgrade.annotation.' + suffix, {
-             n: _affectedFeatureCount
+               if (gpx) {
+                 gpx.url(hash.gpx, '.gpx');
+               }
+             }
+
+             if (hash.offset) {
+               var offset = hash.offset.replace(/;/g, ',').split(',').map(function (n) {
+                 return !isNaN(n) && n;
+               });
+
+               if (offset.length === 2) {
+                 background.offset(geoMetersToOffset(offset));
+               }
+             }
+           })["catch"](function () {
+             /* ignore */
            });
          };
 
-         operation.id = 'downgrade';
-         operation.keys = [uiCmd('⌫')];
-         operation.title = _t('operations.downgrade.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
+         return utilRebind(background, dispatch, 'on');
        }
 
-       function operationExtract(context, selectedIDs) {
-         var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';
-
-         var _geometries = utilArrayUniq(selectedIDs.map(function (entityID) {
-           return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
-         }).filter(Boolean));
+       function rendererFeatures(context) {
+         var dispatch = dispatch$8('change', 'redraw');
+         var features = utilRebind({}, dispatch, 'on');
 
-         var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';
+         var _deferred = new Set();
 
-         var _extent;
+         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 = {};
 
-         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 update() {
+           if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);
+             var disabled = features.disabled();
 
-           if (entity.type !== 'node') {
-             var preset = _mainPresetIndex.match(entity, graph); // only allow extraction from ways/relations if the preset supports points
+             if (disabled.length) {
+               hash.disable_features = disabled.join(',');
+             } else {
+               delete hash.disable_features;
+             }
 
-             if (preset.geometry.indexOf('point') === -1) return null;
+             window.location.replace('#' + utilQsString(hash, true));
+             corePreferences('disabled-features', disabled.join(','));
            }
 
-           _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
-           return actionExtract(entityID);
-         }).filter(Boolean);
+           _hidden = features.hidden();
+           dispatch.call('change');
+           dispatch.call('redraw');
+         }
 
-         var operation = function operation() {
-           var combinedAction = function combinedAction(graph) {
-             _actions.forEach(function (action) {
-               graph = action(graph);
-             });
+         function defineRule(k, filter, max) {
+           var isEnabled = true;
 
-             return graph;
+           _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;
+             }
            };
+         }
 
-           context.perform(combinedAction, operation.annotation()); // do the extract
+         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..
 
-           var extractedNodeIDs = _actions.map(function (action) {
-             return action.getExtractedNodeID();
-           });
+         defineRule('past_future', function isPastFuture(tags) {
+           if (traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]) {
+             return false;
+           }
 
-           context.enter(modeSelect(context, extractedNodeIDs));
-         };
+           var strings = Object.keys(tags);
 
-         operation.available = function () {
-           return _actions.length && selectedIDs.length === _actions.length;
-         };
+           for (var i = 0; i < strings.length; i++) {
+             var s = strings[i];
 
-         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';
+             if (past_futures[s] || past_futures[tags[s]]) {
+               return true;
+             }
            }
 
            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`
 
-         operation.tooltip = function () {
-           var disableReason = operation.disabled();
+         defineRule('others', function isOther(tags, geometry) {
+           return geometry === 'line' || geometry === 'area';
+         });
 
-           if (disableReason) {
-             return _t('operations.extract.' + disableReason + '.' + _amount);
-           } else {
-             return _t('operations.extract.description.' + _geometryID + '.' + _amount);
-           }
+         features.features = function () {
+           return _rules;
          };
 
-         operation.annotation = function () {
-           return _t('operations.extract.annotation', {
-             n: selectedIDs.length
-           });
+         features.keys = function () {
+           return _keys;
          };
 
-         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;
-         }
-
-         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();
+         features.enabled = function (k) {
+           if (!arguments.length) {
+             return _keys.filter(function (k) {
+               return _rules[k].enabled;
              });
-             if (interestingIDs.length) resultIDs = interestingIDs;
            }
 
-           context.enter(modeSelect(context, resultIDs));
-         };
-
-         operation.available = function () {
-           return selectedIDs.length >= 2;
+           return _rules[k] && _rules[k].enabled;
          };
 
-         operation.disabled = function () {
-           var actionDisabled = _action.disabled(context.graph());
-
-           if (actionDisabled) return actionDisabled;
-           var osm = context.connection();
-
-           if (osm && _action.resultingWayNodesLength && _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
-             return 'too_many_vertices';
+         features.disabled = function (k) {
+           if (!arguments.length) {
+             return _keys.filter(function (k) {
+               return !_rules[k].enabled;
+             });
            }
 
-           return false;
+           return _rules[k] && !_rules[k].enabled;
          };
 
-         operation.tooltip = function () {
-           var disabled = operation.disabled();
-
-           if (disabled) {
-             if (disabled === 'restriction') {
-               return _t('operations.merge.restriction', {
-                 relation: _mainPresetIndex.item('type/restriction').name()
-               });
-             }
-
-             return _t('operations.merge.' + disabled);
+         features.hidden = function (k) {
+           if (!arguments.length) {
+             return _keys.filter(function (k) {
+               return _rules[k].hidden();
+             });
            }
 
-           return _t('operations.merge.description');
-         };
-
-         operation.annotation = function () {
-           return _t('operations.merge.annotation', {
-             n: selectedIDs.length
-           });
+           return _rules[k] && _rules[k].hidden();
          };
 
-         operation.id = 'merge';
-         operation.keys = [_t('operations.merge.key')];
-         operation.title = _t('operations.merge.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
-
-       function operationPaste(context) {
-         var _pastePoint;
-
-         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];
-
-             extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
-
-
-             var parents = context.graph().parentWays(newEntity);
-             var parentCopied = parents.some(function (parent) {
-               return originals.has(parent.id);
+         features.autoHidden = function (k) {
+           if (!arguments.length) {
+             return _keys.filter(function (k) {
+               return _rules[k].autoHidden();
              });
+           }
 
-             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 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
-
-           context.replace(actionMove(newIDs, delta, projection), operation.annotation());
-           context.enter(modeSelect(context, newIDs));
+           return _rules[k] && _rules[k].autoHidden();
          };
 
-         operation.point = function (val) {
-           _pastePoint = val;
-           return operation;
-         };
+         features.enable = function (k) {
+           if (_rules[k] && !_rules[k].enabled) {
+             _rules[k].enable();
 
-         operation.available = function () {
-           return context.mode().id === 'browse';
+             update();
+           }
          };
 
-         operation.disabled = function () {
-           return !context.copyIDs().length;
-         };
+         features.enableAll = function () {
+           var didEnable = false;
 
-         operation.tooltip = function () {
-           var oldGraph = context.copyGraph();
-           var ids = context.copyIDs();
+           for (var k in _rules) {
+             if (!_rules[k].enabled) {
+               didEnable = true;
 
-           if (!ids.length) {
-             return _t('operations.paste.nothing_copied');
+               _rules[k].enable();
+             }
            }
 
-           return _t('operations.paste.description', {
-             feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph),
-             n: ids.length
-           });
-         };
-
-         operation.annotation = function () {
-           var ids = context.copyIDs();
-           return _t('operations.paste.annotation', {
-             n: ids.length
-           });
+           if (didEnable) update();
          };
 
-         operation.id = 'paste';
-         operation.keys = [uiCmd('⌘V')];
-         operation.title = _t('operations.paste.title');
-         return operation;
-       }
+         features.disable = function (k) {
+           if (_rules[k] && _rules[k].enabled) {
+             _rules[k].disable();
 
-       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();
+             update();
+           }
          };
 
-         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);
-         }
+         features.disableAll = function () {
+           var didDisable = false;
 
-         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';
-         }
+           for (var k in _rules) {
+             if (_rules[k].enabled) {
+               didDisable = true;
 
-         operation.available = function (situation) {
-           return actions(situation).length > 0;
-         };
+               _rules[k].disable();
+             }
+           }
 
-         operation.disabled = function () {
-           return false;
+           if (didDisable) update();
          };
 
-         operation.tooltip = function () {
-           return _t('operations.reverse.description.' + reverseTypeID());
-         };
+         features.toggle = function (k) {
+           if (_rules[k]) {
+             (function (f) {
+               return f.enabled ? f.disable() : f.enable();
+             })(_rules[k]);
 
-         operation.annotation = function () {
-           var acts = actions();
-           return _t('operations.reverse.annotation.' + reverseTypeID(), {
-             n: acts.length
-           });
+             update();
+           }
          };
 
-         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';
-         });
-
-         var _selectedWayIds = selectedIDs.filter(function (id) {
-           var entity = context.graph().hasEntity(id);
-           return entity && entity.type === 'way';
-         });
+         features.resetStats = function () {
+           for (var i = 0; i < _keys.length; i++) {
+             _rules[_keys[i]].count = 0;
+           }
 
-         var _isAvailable = _vertexIds.length > 0 && _vertexIds.length + _selectedWayIds.length === selectedIDs.length;
+           dispatch.call('change');
+         };
 
-         var _action = actionSplit(_vertexIds);
+         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 _ways = [];
-         var _geometry = 'feature';
-         var _waysAmount = 'single';
+           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..
 
-         var _nodesAmount = _vertexIds.length === 1 ? 'single' : 'multiple';
 
-         if (_isAvailable) {
-           if (_selectedWayIds.length) _action.limitWays(_selectedWayIds);
-           _ways = _action.ways(context.graph());
-           var geometries = {};
+           _cullFactor = dimensions[0] * dimensions[1] / 1000000;
 
-           _ways.forEach(function (way) {
-             geometries[way.geometry(context.graph())] = true;
-           });
+           for (i = 0; i < entities.length; i++) {
+             geometry = entities[i].geometry(resolver);
+             matches = Object.keys(features.getMatches(entities[i], resolver, geometry));
 
-           if (Object.keys(geometries).length === 1) {
-             _geometry = Object.keys(geometries)[0];
+             for (j = 0; j < matches.length; j++) {
+               _rules[matches[j]].count++;
+             }
            }
 
-           _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));
-         };
+           currHidden = features.hidden();
 
-         operation.relatedEntityIds = function () {
-           return _selectedWayIds.length ? [] : _ways.map(function (way) {
-             return way.id;
-           });
-         };
+           if (currHidden !== _hidden) {
+             _hidden = currHidden;
+             needsRedraw = true;
+             dispatch.call('change');
+           }
 
-         operation.available = function () {
-           return _isAvailable;
+           return needsRedraw;
          };
 
-         operation.disabled = function () {
-           var reason = _action.disabled(context.graph());
-
-           if (reason) {
-             return reason;
-           } else if (selectedIDs.some(context.hasHiddenConnections)) {
-             return 'connected_to_hidden';
+         features.stats = function () {
+           for (var i = 0; i < _keys.length; i++) {
+             _stats[_keys[i]] = _rules[_keys[i]].count;
            }
 
-           return false;
+           return _stats;
          };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           if (disable) return _t('operations.split.' + disable);
-           return _t('operations.split.description.' + _geometry + '.' + _waysAmount + '.' + _nodesAmount + '_node');
+         features.clear = function (d) {
+           for (var i = 0; i < d.length; i++) {
+             features.clearEntity(d[i]);
+           }
          };
 
-         operation.annotation = function () {
-           return _t('operations.split.annotation.' + _geometry, {
-             n: _ways.length
-           });
+         features.clearEntity = function (entity) {
+           delete _cache[osmEntity.key(entity)];
          };
 
-         operation.id = 'split';
-         operation.keys = [_t('operations.split.key')];
-         operation.title = _t('operations.split.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+         features.reset = function () {
+           Array.from(_deferred).forEach(function (handle) {
+             window.cancelIdleCallback(handle);
 
-       function operationStraighten(context, selectedIDs) {
-         var _wayIDs = selectedIDs.filter(function (id) {
-           return id.charAt(0) === 'w';
-         });
+             _deferred["delete"](handle);
+           });
+           _cache = {};
+         }; // only certain relations are worth checking
 
-         var _nodeIDs = selectedIDs.filter(function (id) {
-           return id.charAt(0) === 'n';
-         });
 
-         var _amount = (_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple';
+         function relationShouldBeChecked(relation) {
+           // multipolygon features have `area` geometry and aren't checked here
+           return relation.tags.type === 'boundary';
+         }
 
-         var _nodes = utilGetAllNodes(selectedIDs, context.graph());
+         features.getMatches = function (entity, resolver, geometry) {
+           if (geometry === 'vertex' || geometry === 'relation' && !relationShouldBeChecked(entity)) return {};
+           var ent = osmEntity.key(entity);
 
-         var _coords = _nodes.map(function (n) {
-           return n.loc;
-         });
+           if (!_cache[ent]) {
+             _cache[ent] = {};
+           }
 
-         var _extent = utilTotalExtent(selectedIDs, context.graph());
+           if (!_cache[ent].matches) {
+             var matches = {};
+             var hasMatch = false;
 
-         var _action = chooseAction();
+             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,
 
-         var _geometry;
+                 if (entity.type === 'way') {
+                   var parents = features.getParents(entity, resolver, geometry); //   2a. belongs only to a single multipolygon relation
 
-         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 (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]);
 
-             for (var i = 0; i < selectedIDs.length; i++) {
-               var entity = context.entity(selectedIDs[i]);
+                     if (_cache[pkey] && _cache[pkey].matches) {
+                       matches = Object.assign({}, _cache[pkey].matches); // shallow copy
 
-               if (entity.type === 'node') {
-                 continue;
-               } else if (entity.type !== 'way' || entity.isClosed()) {
-                 return null; // exit early, can't straighten these
+                       continue;
+                     }
+                   }
+                 }
                }
 
-               startNodeIDs.push(entity.first());
-               endNodeIDs.push(entity.last());
-             } // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)
+               if (_rules[_keys[i]].filter(entity.tags, geometry)) {
+                 matches[_keys[i]] = hasMatch = true;
+               }
+             }
 
+             _cache[ent].matches = matches;
+           }
 
-             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)
+           return _cache[ent].matches;
+         };
 
-             if (utilArrayDifference(startNodeIDs, endNodeIDs).length + utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) return null; // Ensure path contains at least 3 unique nodes
+         features.getParents = function (entity, resolver, geometry) {
+           if (geometry === 'point') return [];
+           var ent = osmEntity.key(entity);
 
-             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 (!_cache[ent]) {
+             _cache[ent] = {};
+           }
 
-             if (_nodeIDs.length === 2 && (wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1)) return null;
+           if (!_cache[ent].parents) {
+             var parents = [];
 
-             if (_nodeIDs.length) {
-               // If we're only straightenting between two points, we only need that extent visible
-               _extent = utilTotalExtent(_nodeIDs, context.graph());
+             if (geometry === 'vertex') {
+               parents = resolver.parentWays(entity);
+             } else {
+               // 'line', 'area', 'relation'
+               parents = resolver.parentRelations(entity);
              }
 
-             _geometry = 'line';
-             return actionStraightenWay(selectedIDs, context.projection);
+             _cache[ent].parents = parents;
            }
 
-           return null;
-         }
-
-         function operation() {
-           if (!_action) return;
-           context.perform(_action, operation.annotation());
-           window.setTimeout(function () {
-             context.validator().validate();
-           }, 300); // after any transition
-         }
-
-         operation.available = function () {
-           return Boolean(_action);
+           return _cache[ent].parents;
          };
 
-         operation.disabled = function () {
-           var reason = _action.disabled(context.graph());
+         features.isHiddenPreset = function (preset, geometry) {
+           if (!_hidden.length) return false;
+           if (!preset.tags) return false;
+           var test = preset.setTags({}, geometry);
 
-           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';
+           for (var key in _rules) {
+             if (_rules[key].filter(test, geometry)) {
+               if (_hidden.indexOf(key) !== -1) {
+                 return key;
+               }
+
+               return false;
+             }
            }
 
            return false;
+         };
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
+         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);
+           });
+         };
 
-             if (osm) {
-               var missing = _coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+         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 (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
-               }
+           for (var i = 0; i < parents.length; i++) {
+             if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
+               return false;
              }
-
-             return false;
            }
-         };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.straighten.' + disable + '.' + _amount) : _t('operations.straighten.description.' + _geometry + (_wayIDs.length === 1 ? '' : 's'));
+           return true;
          };
 
-         operation.annotation = function () {
-           return _t('operations.straighten.annotation.' + _geometry, {
-             n: _wayIDs.length ? _wayIDs.length : _nodeIDs.length
-           });
-         };
+         features.hasHiddenConnections = function (entity, resolver) {
+           if (!_hidden.length) return false;
+           var childNodes, connections;
 
-         operation.id = 'straighten';
-         operation.keys = [_t('operations.straighten.key')];
-         operation.title = _t('operations.straighten.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+           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 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;
+           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));
+           });
+         };
 
-       function modeSelect(context, selectedIDs) {
-         var mode = {
-           id: 'select',
-           button: 'browse'
+         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);
          };
-         var keybinding = utilKeybinding('select');
 
-         var _breatheBehavior = behaviorBreathe();
+         features.filter = function (d, resolver) {
+           if (!_hidden.length) return d;
+           var result = [];
 
-         var _modeDragNode = modeDragNode(context);
+           for (var i = 0; i < d.length; i++) {
+             var entity = d[i];
 
-         var _selectBehavior;
+             if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
+               result.push(entity);
+             }
+           }
 
-         var _behaviors = [];
-         var _operations = [];
-         var _newFeature = false;
-         var _follow = false;
+           return result;
+         };
 
-         function singular() {
-           if (selectedIDs && selectedIDs.length === 1) {
-             return context.hasEntity(selectedIDs[0]);
+         features.forceVisible = function (entityIDs) {
+           if (!arguments.length) return Object.keys(_forceVisible);
+           _forceVisible = {};
+
+           for (var i = 0; i < entityIDs.length; i++) {
+             _forceVisible[entityIDs[i]] = true;
+             var entity = context.hasEntity(entityIDs[i]);
+
+             if (entity && entity.type === 'relation') {
+               // also show relation members (one level deep)
+               for (var j in entity.members) {
+                 _forceVisible[entity.members[j].id] = true;
+               }
+             }
            }
-         }
 
-         function selectedEntities() {
-           return selectedIDs.map(function (id) {
-             return context.hasEntity(id);
-           }).filter(Boolean);
-         }
+           return features;
+         };
 
-         function checkSelectedIDs() {
-           var ids = [];
+         features.init = function () {
+           var storage = corePreferences('disabled-features');
 
-           if (Array.isArray(selectedIDs)) {
-             ids = selectedIDs.filter(function (id) {
-               return context.hasEntity(id);
-             });
+           if (storage) {
+             var storageDisabled = storage.replace(/;/g, ',').split(',');
+             storageDisabled.forEach(features.disable);
            }
 
-           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;
-           }
+           var hash = utilStringQs(window.location.hash);
 
-           selectedIDs = ids;
-           return true;
-         } // find the common parent ways for nextVertex, previousVertex
+           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
 
 
-         function commonParents() {
-           var graph = context.graph();
-           var commonParents = [];
+         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 = 0; i < selectedIDs.length; i++) {
-             var entity = context.hasEntity(selectedIDs[i]);
+             var entities = [].concat(types.relation || [], types.way || [], types.node || []);
 
-             if (!entity || entity.geometry(graph) !== 'vertex') {
-               return []; // selection includes some not vertices
+             for (var i = 0; i < entities.length; i++) {
+               var geometry = entities[i].geometry(graph);
+               features.getMatches(entities[i], graph, geometry);
              }
+           });
 
-             var currParents = graph.parentWays(entity).map(function (w) {
-               return w.id;
-             });
+           _deferred.add(handle);
+         });
+         return features;
+       }
 
-             if (!commonParents.length) {
-               commonParents = currParents;
-               continue;
-             }
+       //
+       // - 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
+       //
+
+       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;
 
-             commonParents = utilArrayIntersection(commonParents, currParents);
+         for (i = 0; i < parents.length; i++) {
+           nodes = parents[i].nodes;
+           isClosed = parents[i].isClosed();
 
-             if (!commonParents.length) {
-               return [];
+           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 commonParents;
          }
 
-         function singularParent() {
-           var parents = commonParents();
+         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 (!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.
+           if (shouldReverse(entity)) {
+             coordinates.reverse();
+           }
 
+           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 (parents.length === 1) {
-             _relatedParent = parents[0]; // remember this parent for later
+               if (a) {
+                 var span = geoVecLength(a, b) - offset;
 
-             return _relatedParent;
-           }
+                 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
 
-           if (parents.indexOf(_relatedParent) !== -1) {
-             return _relatedParent; // prefer the previously seen parent
-           }
+                   var coord = [a, p];
 
-           return parents[0];
-         }
+                   for (span -= dt; span >= 0; span -= dt) {
+                     p = geoVecAdd(p, [dx, dy]);
+                     coord.push(p);
+                   }
 
-         mode.selectedIDs = function (val) {
-           if (!arguments.length) return selectedIDs;
-           selectedIDs = val;
-           return mode;
-         };
+                   coord.push(b); // generate svg paths
 
-         mode.zoomToSelected = function () {
-           context.map().zoomToEase(selectedEntities());
-         };
+                   var segment = '';
+                   var j;
 
-         mode.newFeature = function (val) {
-           if (!arguments.length) return _newFeature;
-           _newFeature = val;
-           return mode;
-         };
+                   for (j = 0; j < coord.length; j++) {
+                     segment += (j === 0 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
+                   }
 
-         mode.selectBehavior = function (val) {
-           if (!arguments.length) return _selectBehavior;
-           _selectBehavior = val;
-           return mode;
-         };
+                   segments.push({
+                     id: entity.id,
+                     index: i++,
+                     d: segment
+                   });
 
-         mode.follow = function (val) {
-           if (!arguments.length) return _follow;
-           _follow = val;
-           return mode;
-         };
+                   if (bothDirections(entity)) {
+                     segment = '';
 
-         function loadOperations() {
-           _operations.forEach(function (operation) {
-             if (operation.behavior) {
-               context.uninstall(operation.behavior);
-             }
-           });
+                     for (j = coord.length - 1; j >= 0; j--) {
+                       segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
+                     }
 
-           _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();
-           });
+                     segments.push({
+                       id: entity.id,
+                       index: i++,
+                       d: segment
+                     });
+                   }
+                 }
 
-           _operations.forEach(function (operation) {
-             if (operation.behavior) {
-               context.install(operation.behavior);
-             }
-           }); // remove any displayed menu
+                 offset = -span;
+               }
 
+               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));
+           }
+         });
 
-           context.ui().closeEditMenu();
-         }
+         var svgpath = function svgpath(entity) {
+           if (entity.id in cache) {
+             return cache[entity.id];
+           } else {
+             return cache[entity.id] = path(entity.asGeoJSON(graph));
+           }
+         };
 
-         mode.operations = function () {
-           return _operations;
+         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);
+           }
          };
 
-         mode.enter = function () {
-           if (!checkSelectedIDs()) return;
-           context.features().forceVisible(selectedIDs);
+         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] + ')';
+         };
 
-           _modeDragNode.restoreSelectedIDs(selectedIDs);
+         svgpoint.geojson = function (d) {
+           return svgpoint(d.properties.entity);
+         };
 
-           loadOperations();
+         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;
 
-           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 (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();
+         }
 
-           _behaviors.forEach(context.install);
+         function getWaySegments() {
+           var isActiveWay = way.nodes.indexOf(activeID) !== -1;
+           var features = {
+             passive: [],
+             active: []
+           };
+           var start = {};
+           var end = {};
+           var node, type;
 
-           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 i = 0; i < way.nodes.length; i++) {
+             node = graph.entity(way.nodes[i]);
+             type = svgPassiveVertex(node, graph, activeID);
+             end = {
+               node: node,
+               type: type
+             };
 
-             selectElements();
-           }).on('undone.select', checkSelectedIDs).on('redone.select', checkSelectedIDs);
-           context.map().on('drawn.select', selectElements).on('crossEditableZoom.select', function () {
-             selectElements();
+             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);
+               }
+             }
 
-             _breatheBehavior.restartIfNeeded(context.surface());
-           });
-           context.map().doubleUpHandler().on('doubleUp.modeSelect', didDoubleUp);
-           selectElements();
+             start = end;
+           }
 
-           if (_follow) {
-             var extent = geoExtent();
-             var graph = context.graph();
-             selectedIDs.forEach(function (id) {
-               var entity = context.entity(id);
+           return features;
 
-               extent._extend(entity.extent(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]
+               }
              });
-             var loc = extent.center();
-             context.map().centerEase(loc); // we could enter the mode multiple times, so reset follow for next time
-
-             _follow = false;
            }
 
-           function nudgeSelection(delta) {
-             return function () {
-               // prevent nudging during low zoom selection
-               if (!context.map().withinEditableZoom()) return;
-               var moveOp = operationMove(context, selectedIDs);
-
-               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 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]
                }
-             };
+             });
            }
+         }
+       }
 
-           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 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'];
 
-               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.
+         var _tags = function _tags(entity) {
+           return entity.tags;
+         };
 
-               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 tagClasses = function tagClasses(selection) {
+           selection.each(function tagClassesEach(entity) {
+             var value = this.className;
 
-                 return false;
+             if (value.baseVal !== undefined) {
+               value = value.baseVal;
+             }
 
-                 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);
-                 }
+             var t = _tags(entity);
 
-                 function someMissing() {
-                   if (context.inIntro()) return false;
-                   var osm = context.connection();
+             var computed = tagClasses.getClassesString(t, value);
 
-                   if (osm) {
-                     var missing = nodes.filter(function (n) {
-                       return !osm.isDataLoaded(n.loc);
-                     });
+             if (computed !== value) {
+               select(this).attr('class', computed);
+             }
+           });
+         };
 
-                     if (missing.length) {
-                       missing.forEach(function (loc) {
-                         context.loadTileAtLoc(loc);
-                       });
-                       return true;
-                     }
-                   }
+         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
 
-                   return false;
-                 }
+           var overrideGeometry;
 
-                 function incompleteRelation(id) {
-                   var entity = context.entity(id);
-                   return entity.type === 'relation' && !entity.isComplete(context.graph());
-                 }
-               }
+           if (/\bstroke\b/.test(value)) {
+             if (!!t.barrier && t.barrier !== 'no') {
+               overrideGeometry = 'line';
+             }
+           } // preserve base classes (nothing with `tag-`)
 
-               var disabled = scalingDisabled();
 
-               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();
-               }
-             };
-           }
+           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..
 
-           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;
+           for (i = 0; i < primaries.length; i++) {
+             k = primaries[i];
+             v = t[k];
+             if (!v || v === 'no') continue;
 
-             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'));
+             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';
              }
-           }
 
-           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();
-
-             if (_relatedParent) {
-               surface.selectAll(utilEntitySelector([_relatedParent])).classed('related', true);
-             }
+             primary = k;
 
-             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);
+             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);
              }
-           }
 
-           function esc() {
-             if (context.container().select('.combobox').size()) return;
-             context.enter(modeBrowse(context));
+             break;
            }
 
-           function firstVertex(d3_event) {
-             d3_event.preventDefault();
-             var entity = singular();
-             var parent = singularParent();
-             var way;
+           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 (entity && entity.type === 'way') {
-               way = entity;
-             } else if (parent) {
-               way = context.entity(parent);
+                 v = t[k];
+                 if (!v || v === 'no') continue;
+                 status = statuses[i];
+                 break;
+               }
              }
+           } // add at most one status tag, only if relates to primary tag..
 
-             if (way) {
-               context.enter(modeSelect(context, [way.first()]).follow(true));
-             }
-           }
 
-           function lastVertex(d3_event) {
-             d3_event.preventDefault();
-             var entity = singular();
-             var parent = singularParent();
-             var way;
+           if (!status) {
+             for (i = 0; i < statuses.length; i++) {
+               k = statuses[i];
+               v = t[k];
+               if (!v || v === 'no') continue;
 
-             if (entity && entity.type === 'way') {
-               way = entity;
-             } else if (parent) {
-               way = context.entity(parent);
-             }
+               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`
 
-             if (way) {
-               context.enter(modeSelect(context, [way.last()]).follow(true));
+
+               if (status) break;
              }
            }
 
-           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;
+           if (status) {
+             classes.push('tag-status');
+             classes.push('tag-status-' + status);
+           } // add any secondary tags
 
-             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));
-             }
-           }
+           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..
 
-           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;
 
-             if (curr < length - 1) {
-               index = curr + 1;
-             } else if (way.isClosed()) {
-               index = 0;
-             }
+           if (primary === 'highway' && !osmPathHighwayTagValues[t.highway] || primary === 'aeroway') {
+             var surface = t.highway === 'track' ? 'unpaved' : 'paved';
 
-             if (index !== -1) {
-               context.enter(modeSelect(context, [way.nodes[index]]).follow(true));
-             }
-           }
+             for (k in t) {
+               v = t[k];
 
-           function nextParent(d3_event) {
-             d3_event.preventDefault();
-             var parents = commonParents();
-             if (!parents || parents.length < 2) return;
-             var index = parents.indexOf(_relatedParent);
+               if (k in osmPavedTags) {
+                 surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
+               }
 
-             if (index < 0 || index > parents.length - 2) {
-               _relatedParent = parents[0];
-             } else {
-               _relatedParent = parents[index + 1];
+               if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
+                 surface = 'semipaved';
+               }
              }
 
-             var surface = context.surface();
-             surface.selectAll('.related').classed('related', false);
+             classes.push('tag-' + surface);
+           } // If this is a wikidata-tagged item, add a class for that..
 
-             if (_relatedParent) {
-               surface.selectAll(utilEntitySelector([_relatedParent])).classed('related', true);
-             }
+
+           var qid = t.wikidata || t['flag:wikidata'] || t['brand:wikidata'] || t['network:wikidata'] || t['operator:wikidata'];
+
+           if (qid) {
+             classes.push('tag-wikidata');
            }
+
+           return classes.join(' ').trim();
          };
 
-         mode.exit = function () {
-           _newFeature = false;
+         tagClasses.tags = function (val) {
+           if (!arguments.length) return _tags;
+           _tags = val;
+           return tagClasses;
+         };
 
-           _operations.forEach(function (operation) {
-             if (operation.behavior) {
-               context.uninstall(operation.behavior);
-             }
-           });
+         return tagClasses;
+       }
 
-           _operations = [];
+       // 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;
+         }
 
-           _behaviors.forEach(context.uninstall);
+         for (var tag in patterns) {
+           var entityValue = tags[tag];
+           if (!entityValue) continue;
 
-           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 (typeof patterns[tag] === 'string') {
+             // extra short syntax (just tag) - pattern name
+             return 'pattern-' + patterns[tag];
+           } else {
+             var values = patterns[tag];
 
-           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'));
-           }
-         };
+             for (var value in values) {
+               if (entityValue !== value) continue;
+               var rules = values[value];
+
+               if (typeof rules === 'string') {
+                 // short syntax - pattern name
+                 return 'pattern-' + rules;
+               } // long syntax - rule array
 
-         return mode;
-       }
 
-       function uiLasso(context) {
-         var group, polygon;
-         lasso.coordinates = [];
+               for (var ruleKey in rules) {
+                 var rule = rules[ruleKey];
+                 var pass = true;
 
-         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 criterion in rule) {
+                   if (criterion !== 'pattern') {
+                     // reserved for pattern name
+                     // The only rule is a required tag-value pair
+                     var v = tags[criterion];
 
-         function draw() {
-           if (polygon) {
-             polygon.data([lasso.coordinates]).attr('d', function (d) {
-               return 'M' + d.join(' L') + ' Z';
-             });
+                     if (!v || v !== rule[criterion]) {
+                       pass = false;
+                       break;
+                     }
+                   }
+                 }
+
+                 if (pass) {
+                   return 'pattern-' + rule.pattern;
+                 }
+               }
+             }
            }
          }
 
-         lasso.extent = function () {
-           return lasso.coordinates.reduce(function (extent, point) {
-             return extent.extend(geoExtent(point));
-           }, geoExtent());
-         };
+         return null;
+       }
 
-         lasso.p = function (_) {
-           if (!arguments.length) return lasso;
-           lasso.coordinates.push(_);
-           draw();
-           return lasso;
-         };
+       function svgAreas(projection, context) {
+         function getPatternStyle(tags) {
+           var imageID = svgTagPattern(tags);
 
-         lasso.close = function () {
-           if (group) {
-             group.call(uiToggle(false, function () {
-               select(this).remove();
-             }));
+           if (imageID) {
+             return 'url("#ideditor-' + imageID + '")';
            }
 
-           context.container().classed('lasso', false);
-         };
+           return '';
+         }
 
-         return lasso;
-       }
+         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
 
-       function behaviorLasso(context) {
-         // use pointer events on supported platforms; fallback to mouse events
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+           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 behavior = function behavior(selection) {
-           var lasso;
+           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
 
-           function pointerdown(d3_event) {
-             var button = 0; // left
+           targets.exit().remove();
 
-             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();
-             }
-           }
+           var segmentWasEdited = function segmentWasEdited(d) {
+             var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
 
-           function pointermove() {
-             if (!lasso) {
-               lasso = uiLasso(context);
-               context.surface().call(lasso);
+             if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
+               return false;
              }
 
-             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])]];
-           }
-
-           function lassoed() {
-             if (!lasso) return [];
-             var graph = context.graph();
-             var limitToNodes;
+             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 (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
+           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
 
-             intersects.sort(function (node1, node2) {
-               var parents1 = graph.parentWays(node1);
-               var parents2 = graph.parentWays(node2);
+           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
 
-               if (parents1.length && parents2.length) {
-                 // both nodes are vertices
-                 var sharedParents = utilArrayIntersection(parents1, parents2);
+           nopes.exit().remove(); // enter/update
 
-                 if (sharedParents.length) {
-                   var sharedParentNodes = sharedParents[0].nodes; // vertices are members of the same way; sort them in their listed order
+           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);
+         }
 
-                   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
+         function drawAreas(selection, graph, entities, filter) {
+           var path = svgPath(projection, graph, true);
+           var areas = {};
+           var multipolygon;
+           var base = context.history().base();
 
+           for (var i = 0; i < entities.length; i++) {
+             var entity = entities[i];
+             if (entity.geometry(graph) !== 'area') continue;
+             multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
 
-               return node1.loc[0] - node2.loc[0];
-             });
-             return intersects.map(function (entity) {
-               return entity.id;
-             });
+             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))
+               };
+             }
            }
 
-           function pointerup() {
-             select(window).on(_pointerPrefix + 'move.lasso', null).on(_pointerPrefix + 'up.lasso', null);
-             if (!lasso) return;
-             var ids = lassoed();
-             lasso.close();
+           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 (ids.length) {
-               context.enter(modeSelect(context, ids));
+           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 sortedByArea(entity) {
+             if (this._parent.__data__ === 'fill') {
+               return fillpaths[bisect(fillpaths, -entity.area(graph))];
              }
            }
 
-           selection.on(_pointerPrefix + 'down.lasso', pointerdown);
-         };
+           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);
 
-         behavior.off = function (selection) {
-           selection.on(_pointerPrefix + 'down.lasso', null);
-         };
+             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..
 
-         return behavior;
+           touchLayer.call(drawTargets, graph, data.stroke, filter);
+         }
+
+         return drawAreas;
        }
 
-       function modeBrowse(context) {
-         var mode = {
-           button: 'browse',
-           id: 'browse',
-           title: _t('modes.browse.title'),
-           description: _t('modes.browse.description')
+       var fastJsonStableStringify = function fastJsonStableStringify(data, opts) {
+         if (!opts) opts = {};
+         if (typeof opts === 'function') opts = {
+           cmp: opts
          };
-         var sidebar;
-
-         var _selectBehavior;
-
-         var _behaviors = [];
+         var cycles = typeof opts.cycles === 'boolean' ? opts.cycles : false;
 
-         mode.selectBehavior = function (val) {
-           if (!arguments.length) return _selectBehavior;
-           _selectBehavior = val;
-           return mode;
-         };
+         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);
 
-         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];
+         var seen = [];
+         return function stringify(node) {
+           if (node && node.toJSON && typeof node.toJSON === 'function') {
+             node = node.toJSON();
            }
 
-           _behaviors.forEach(context.install); // Get focus on the body.
+           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 (Array.isArray(node)) {
+             out = '[';
 
-           if (document.activeElement && document.activeElement.blur) {
-             document.activeElement.blur();
-           }
+             for (i = 0; i < node.length; i++) {
+               if (i) out += ',';
+               out += stringify(node[i]) || 'null';
+             }
 
-           if (sidebar) {
-             context.ui().sidebar.show(sidebar);
-           } else {
-             context.ui().sidebar.select(null);
+             return out + ']';
            }
-         };
 
-         mode.exit = function () {
-           context.ui().sidebar.hover.cancel();
+           if (node === null) return 'null';
 
-           _behaviors.forEach(context.uninstall);
+           if (seen.indexOf(node) !== -1) {
+             if (cycles) return JSON.stringify('__cycle__');
+             throw new TypeError('Converting circular structure to JSON');
+           }
 
-           if (sidebar) {
-             context.ui().sidebar.hide();
+           var seenIndex = seen.push(node) - 1;
+           var keys = Object.keys(node).sort(cmp && cmp(node));
+           out = '';
+
+           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;
            }
-         };
 
-         mode.sidebar = function (_) {
-           if (!arguments.length) return sidebar;
-           sidebar = _;
-           return mode;
-         };
+           seen.splice(seenIndex, 1);
+           return '{' + out + '}';
+         }(data);
+       };
 
-         mode.operations = function () {
-           return [operationPaste(context)];
-         };
+       var $$1 = _export;
+       var $entries = objectToArray.entries;
 
-         return mode;
-       }
+       // `Object.entries` method
+       // https://tc39.es/ecma262/#sec-object.entries
+       $$1({ target: 'Object', stat: true }, {
+         entries: function entries(O) {
+           return $entries(O);
+         }
+       });
 
-       function behaviorAddWay(context) {
-         var dispatch$1 = dispatch('start', 'startFromWay', 'startFromNode');
-         var draw = behaviorDraw(context);
+       var _marked = /*#__PURE__*/regeneratorRuntime.mark(gpxGen),
+           _marked3 = /*#__PURE__*/regeneratorRuntime.mark(kmlGen);
 
-         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);
+       // cast array x into numbers
+       // get the content of a text node, if any
+       function nodeVal(x) {
+         if (x && x.normalize) {
+           x.normalize();
          }
 
-         behavior.off = function (surface) {
-           surface.call(draw.off);
-         };
+         return x && x.textContent || "";
+       } // one Y child of X, if any, otherwise null
 
-         behavior.cancel = function () {
-           window.setTimeout(function () {
-             context.map().dblclickZoomEnable(true);
-           }, 1000);
-           context.enter(modeBrowse(context));
-         };
 
-         return utilRebind(behavior, dispatch$1, 'on');
+       function get1(x, y) {
+         var n = x.getElementsByTagName(y);
+         return n.length ? n[0] : null;
        }
 
-       function behaviorHash(context) {
-         // cached window.location.hash
-         var _cachedHash = null; // allowable latitude range
+       function getLineStyle(extensions) {
+         var style = {};
 
-         var _latitudeLimit = 90 - 1e-8;
+         if (extensions) {
+           var lineStyle = get1(extensions, "line");
 
-         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);
-           });
+           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 (selected.length) {
-             newParams.id = selected.join(',');
+             if (!isNaN(width)) style["stroke-width"] = width * 96 / 25.4;
            }
-
-           newParams.map = zoom.toFixed(2) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
-           return Object.assign(oldParams, newParams);
          }
 
-         function computedHash() {
-           return '#' + utilQsString(computedHashParameters(), true);
-         }
+         return style;
+       } // get the contents of multiple text nodes, if present
 
-         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);
-           });
 
-           if (selected.length) {
-             var firstLabel = utilDisplayLabel(context.entity(selected[0]), context.graph());
+       function getMulti(x, ys) {
+         var o = {};
+         var n;
+         var k;
 
-             if (selected.length > 1) {
-               contextual = _t('title.labeled_and_more', {
-                 labeled: firstLabel,
-                 count: selected.length - 1
-               });
-             } else {
-               contextual = firstLabel;
-             }
+         for (k = 0; k < ys.length; k++) {
+           n = get1(x, ys[k]);
+           if (n) o[ys[k]] = nodeVal(n);
+         }
 
-             titleID = 'context';
-           }
+         return o;
+       }
 
-           if (includeChangeCount) {
-             changeCount = context.history().difference().summary().length;
+       function getProperties$1(node) {
+         var prop = getMulti(node, ["name", "cmt", "desc", "type", "time", "keywords"]); // Parse additional data from our Garmin extension(s)
 
-             if (changeCount > 0) {
-               titleID = contextual ? 'changes_context' : 'changes';
-             }
-           }
+         var extensions = node.getElementsByTagNameNS("http://www.garmin.com/xmlschemas/GpxExtensions/v3", "*");
 
-           if (titleID) {
-             return _t('title.format.' + titleID, {
-               changes: changeCount,
-               base: baseTitle,
-               context: contextual
-             });
-           }
+         for (var i = 0; i < extensions.length; i++) {
+           var extension = extensions[i]; // Ignore nested extensions, like those on routepoints or trackpoints
 
-           return baseTitle;
+           if (extension.parentNode.parentNode === node) {
+             prop[extension.tagName.replace(":", "_")] = nodeVal(extension);
+           }
          }
 
-         function updateTitle(includeChangeCount) {
-           if (!context.setsDocumentTitle()) return;
-           var newTitle = computedTitle(includeChangeCount);
+         var links = node.getElementsByTagName("link");
+         if (links.length) prop.links = [];
 
-           if (document.title !== newTitle) {
-             document.title = newTitle;
-           }
+         for (var _i = 0; _i < links.length; _i++) {
+           prop.links.push(Object.assign({
+             href: links[_i].getAttribute("href")
+           }, getMulti(links[_i], ["text", "type"])));
          }
 
-         function updateHashIfNeeded() {
-           if (context.inIntro()) return;
-           var latestHash = computedHash();
+         return prop;
+       }
 
-           if (_cachedHash !== latestHash) {
-             _cachedHash = latestHash; // Update the URL hash without affecting the browser navigation stack,
-             // though unavoidably creating a browser history entry
+       function coordPair$1(x) {
+         var ll = [parseFloat(x.getAttribute("lon")), parseFloat(x.getAttribute("lat"))];
+         var ele = get1(x, "ele"); // handle namespaced attribute in browser
 
-             window.history.replaceState(null, computedTitle(false
-             /* includeChangeCount */
-             ), latestHash); // set the title we want displayed for the browser tab/window
+         var heart = get1(x, "gpxtpx:hr") || get1(x, "hr");
+         var time = get1(x, "time");
+         var e;
 
-             updateTitle(true
-             /* includeChangeCount */
-             );
+         if (ele) {
+           e = parseFloat(nodeVal(ele));
+
+           if (!isNaN(e)) {
+             ll.push(e);
            }
          }
 
-         var _throttledUpdate = throttle(updateHashIfNeeded, 500);
-
-         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);
-
-           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]);
-
-             if (q.id && mode) {
-               var ids = q.id.split(',').filter(function (id) {
-                 return context.hasEntity(id);
-               });
+         var result = {
+           coordinates: ll,
+           time: time ? nodeVal(time) : null,
+           extendedValues: []
+         };
 
-               if (ids.length && (mode.id === 'browse' || mode.id === 'select' && !utilArrayIdentical(mode.selectedIDs(), ids))) {
-                 context.enter(modeSelect(context, ids));
-                 return;
-               }
-             }
+         if (heart) {
+           result.extendedValues.push(["heart", parseFloat(nodeVal(heart))]);
+         }
 
-             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
+         var extensions = get1(x, "extensions");
 
-             if (mode && mode.id.match(/^draw/) !== null && dist > maxdist) {
-               context.enter(modeBrowse(context));
-               return;
+         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)));
+
+             if (!isNaN(v)) {
+               result.extendedValues.push([name, v]);
              }
            }
          }
 
-         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);
+         return result;
+       }
 
-           if (window.location.hash) {
-             var q = utilStringQs(window.location.hash);
+       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
+           }
+         };
+       }
 
-             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 getPoints$1(node, pointname) {
+         var pts = node.getElementsByTagName(pointname);
+         if (pts.length < 2) return; // Invalid line in GeoJSON
 
-             if (q.walkthrough === 'true') {
-               behavior.startWalkthrough = true;
-             }
+         var line = [];
+         var times = [];
+         var extendedValues = {};
 
-             if (q.map) {
-               behavior.hadHash = true;
+         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];
+
+             var plural = name === "heart" ? name : name + "s";
+
+             if (!extendedValues[plural]) {
+               extendedValues[plural] = Array(pts.length).fill(null);
              }
 
-             hashchange();
-             updateTitle(false);
+             extendedValues[plural][i] = val;
            }
          }
 
-         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 {
+           line: line,
+           times: times,
+           extendedValues: extendedValues
          };
-
-         return behavior;
        }
 
-       /*
-           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.
-        */
-
-       function coreDifference(base, head) {
-         var _changes = {};
-         var _didChange = {}; // 'addition', 'deletion', 'geometry', 'properties'
-
-         var _diff = {};
+       function getTrack(node) {
+         var segments = node.getElementsByTagName("trkseg");
+         var track = [];
+         var times = [];
+         var extractedLines = [];
 
-         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 < segments.length; i++) {
+           var line = getPoints$1(segments[i], "trkpt");
 
-           if (!h && b) {
-             _changes[id] = {
-               base: b,
-               head: h
-             };
-             _didChange.deletion = true;
-             return;
+           if (line) {
+             extractedLines.push(line);
+             if (line.times && line.times.length) times.push(line.times);
            }
+         }
 
-           if (h && !b) {
-             _changes[id] = {
-               base: b,
-               head: h
-             };
-             _didChange.addition = true;
-             return;
+         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]
            }
+         } : {});
 
-           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;
-             }
+         for (var _i3 = 0; _i3 < extractedLines.length; _i3++) {
+           var _line = extractedLines[_i3];
+           track.push(_line.line);
 
-             if (h.loc && b.loc && !geoVecEqual(h.loc, b.loc)) {
-               _changes[id] = {
-                 base: b,
-                 head: h
-               };
-               _didChange.geometry = true;
-             }
+           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];
 
-             if (h.nodes && b.nodes && !fastDeepEqual(h.nodes, b.nodes)) {
-               _changes[id] = {
-                 base: b,
-                 head: h
-               };
-               _didChange.geometry = true;
+             var props = properties;
+
+             if (name === "heart") {
+               if (!properties.coordinateProperties) {
+                 properties.coordinateProperties = {};
+               }
+
+               props = properties.coordinateProperties;
              }
 
-             if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
-               _changes[id] = {
-                 base: b,
-                 head: h
-               };
-               _didChange.properties = true;
+             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 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)));
+         return {
+           type: "Feature",
+           properties: properties,
+           geometry: multi ? {
+             type: "MultiLineString",
+             coordinates: track
+           } : {
+             type: "LineString",
+             coordinates: track[0]
+           }
+         };
+       }
 
-           for (var i = 0; i < ids.length; i++) {
-             checkEntityID(ids[i]);
+       function getPoint(node) {
+         return {
+           type: "Feature",
+           properties: Object.assign(getProperties$1(node), getMulti(node, ["sym"])),
+           geometry: {
+             type: "Point",
+             coordinates: coordPair$1(node).coordinates
            }
-         }
+         };
+       }
 
-         load();
+       function gpxGen(doc) {
+         var tracks, routes, waypoints, i, feature, _i5, _feature, _i6;
 
-         _diff.length = function length() {
-           return Object.keys(_changes).length;
-         };
+         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;
 
-         _diff.changes = function changes() {
-           return _changes;
-         };
+               case 4:
+                 if (!(i < tracks.length)) {
+                   _context.next = 12;
+                   break;
+                 }
 
-         _diff.didChange = _didChange; // pass true to include affected relation members
+                 feature = getTrack(tracks[i]);
 
-         _diff.extantIDs = function extantIDs(includeRelMembers) {
-           var result = new Set();
-           Object.keys(_changes).forEach(function (id) {
-             if (_changes[id].head) {
-               result.add(id);
-             }
+                 if (!feature) {
+                   _context.next = 9;
+                   break;
+                 }
 
-             var h = _changes[id].head;
-             var b = _changes[id].base;
-             var entity = h || b;
+                 _context.next = 9;
+                 return feature;
 
-             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);
+               case 9:
+                 i++;
+                 _context.next = 4;
+                 break;
+
+               case 12:
+                 _i5 = 0;
+
+               case 13:
+                 if (!(_i5 < routes.length)) {
+                   _context.next = 21;
+                   break;
                  }
-               });
-             }
-           });
-           return Array.from(result);
-         };
 
-         _diff.modified = function modified() {
-           var result = [];
-           Object.values(_changes).forEach(function (change) {
-             if (change.base && change.head) {
-               result.push(change.head);
-             }
-           });
-           return result;
-         };
+                 _feature = getRoute(routes[_i5]);
 
-         _diff.created = function created() {
-           var result = [];
-           Object.values(_changes).forEach(function (change) {
-             if (!change.base && change.head) {
-               result.push(change.head);
-             }
-           });
-           return result;
-         };
+                 if (!_feature) {
+                   _context.next = 18;
+                   break;
+                 }
 
-         _diff.deleted = function deleted() {
-           var result = [];
-           Object.values(_changes).forEach(function (change) {
-             if (change.base && !change.head) {
-               result.push(change.base);
-             }
-           });
-           return result;
-         };
+                 _context.next = 18;
+                 return _feature;
 
-         _diff.summary = function summary() {
-           var relevant = {};
-           var keys = Object.keys(_changes);
+               case 18:
+                 _i5++;
+                 _context.next = 13;
+                 break;
 
-           for (var i = 0; i < keys.length; i++) {
-             var change = _changes[keys[i]];
+               case 21:
+                 _i6 = 0;
 
-             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 22:
+                 if (!(_i6 < waypoints.length)) {
+                   _context.next = 28;
+                   break;
+                 }
 
-               if (moved) {
-                 addParents(change.head);
-               }
+                 _context.next = 25;
+                 return getPoint(waypoints[_i6]);
 
-               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');
+               case 25:
+                 _i6++;
+                 _context.next = 22;
+                 break;
+
+               case 28:
+               case "end":
+                 return _context.stop();
              }
            }
+         }, _marked);
+       }
 
-           return Object.values(relevant);
+       function gpx(doc) {
+         return {
+           type: "FeatureCollection",
+           features: Array.from(gpxGen(doc))
+         };
+       }
 
-           function addEntity(entity, graph, changeType) {
-             relevant[entity.id] = {
-               entity: entity,
-               graph: graph,
-               changeType: changeType
-             };
-           }
+       var removeSpace = /\s*/g;
+       var trimSpace = /^\s*|\s*$/g;
+       var splitSpace = /\s+/; // generate a short, numeric hash of a string
 
-           function addParents(entity) {
-             var parents = head.parentWays(entity);
+       function okhash(x) {
+         if (!x || !x.length) return 0;
+         var h = 0;
 
-             for (var j = parents.length - 1; j >= 0; j--) {
-               var parent = parents[j];
+         for (var i = 0; i < x.length; i++) {
+           h = (h << 5) - h + x.charCodeAt(i) | 0;
+         }
 
-               if (!(parent.id in relevant)) {
-                 addEntity(parent, head, 'modified');
-               }
-             }
+         return h;
+       } // get one coordinate from a coordinate array, if any
+
+
+       function coord1(v) {
+         return v.replace(removeSpace, "").split(",").map(parseFloat);
+       } // get all coordinates from a coordinate array as [[],[]]
+
+
+       function coord(v) {
+         return v.replace(trimSpace, "").split(splitSpace).map(coord1);
+       }
+
+       function xml2str(node) {
+         if (node.xml !== undefined) return node.xml;
+
+         if (node.tagName) {
+           var output = node.tagName;
+
+           for (var i = 0; i < node.attributes.length; i++) {
+             output += node.attributes[i].name + node.attributes[i].value;
            }
-         }; // returns complete set of entities that require a redraw
-         //  (optionally within given `extent`)
 
+           for (var _i9 = 0; _i9 < node.childNodes.length; _i9++) {
+             output += xml2str(node.childNodes[_i9]);
+           }
 
-         _diff.complete = function complete(extent) {
-           var result = {};
-           var id, change;
+           return output;
+         }
 
-           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;
+         if (node.nodeName === "#text") {
+           return (node.nodeValue || node.value || "").trim();
+         }
 
-             if (entity.type === 'way') {
-               var nh = h ? h.nodes : [];
-               var nb = b ? b.nodes : [];
-               var diff;
-               diff = utilArrayDifference(nh, nb);
+         if (node.nodeName === "#cdata-section") {
+           return node.nodeValue;
+         }
 
-               for (i = 0; i < diff.length; i++) {
-                 result[diff[i]] = head.hasEntity(diff[i]);
-               }
+         return "";
+       }
 
-               diff = utilArrayDifference(nb, nh);
+       var geotypes = ["Polygon", "LineString", "Point", "Track", "gx:Track"];
 
-               for (i = 0; i < diff.length; i++) {
-                 result[diff[i]] = head.hasEntity(diff[i]);
-               }
-             }
+       function kmlColor(properties, elem, prefix) {
+         var v = nodeVal(get1(elem, "color")) || "";
+         var colorProp = prefix == "stroke" || prefix === "fill" ? prefix : prefix + "-color";
 
-             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);
+         if (v.substr(0, 1) === "#") {
+           v = v.substr(1);
+         }
 
-               for (i = 0; i < ids.length; i++) {
-                 var member = head.hasEntity(ids[i]);
-                 if (!member) continue; // not downloaded
+         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);
+         }
+       }
 
-                 if (extent && !member.intersects(extent, head)) continue; // not visible
+       function numericProperty(properties, elem, source, target) {
+         var val = parseFloat(nodeVal(get1(elem, source)));
+         if (!isNaN(val)) properties[target] = val;
+       }
 
-                 result[ids[i]] = member;
-               }
-             }
+       function gxCoords(root) {
+         var elems = root.getElementsByTagName("coord");
+         var coords = [];
+         var times = [];
+         if (elems.length === 0) elems = root.getElementsByTagName("gx:coord");
 
-             addParents(head.parentWays(entity), result);
-             addParents(head.parentRelations(entity), result);
-           }
+         for (var i = 0; i < elems.length; i++) {
+           coords.push(nodeVal(elems[i]).split(" ").map(parseFloat));
+         }
 
-           return result;
+         var timeElems = root.getElementsByTagName("when");
 
-           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);
+         for (var j = 0; j < timeElems.length; j++) {
+           times.push(nodeVal(timeElems[j]));
+         }
+
+         return {
+           coords: coords,
+           times: times
+         };
+       }
+
+       function getGeometry(root) {
+         var geomNode;
+         var geomNodes;
+         var i;
+         var j;
+         var k;
+         var geoms = [];
+         var 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 = root.getElementsByTagName(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 = geomNode.getElementsByTagName("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 _diff;
+         return {
+           geoms: geoms,
+           coordTimes: coordTimes
+         };
        }
 
-       function coreTree(head) {
-         // tree for entities
-         var _rtree = new RBush();
+       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;
 
-         var _bboxes = {}; // maintain a separate tree for granular way segments
+         if (styleUrl) {
+           if (styleUrl[0] !== "#") {
+             styleUrl = "#" + styleUrl;
+           }
 
-         var _segmentsRTree = new RBush();
+           properties.styleUrl = styleUrl;
 
-         var _segmentsBBoxes = {};
-         var _segmentsByWayId = {};
-         var tree = {};
+           if (styleIndex[styleUrl]) {
+             properties.styleHash = styleIndex[styleUrl];
+           }
 
-         function entityBBox(entity) {
-           var bbox = entity.extent(head).bbox();
-           bbox.id = entity.id;
-           _bboxes[entity.id] = bbox;
-           return bbox;
+           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 (!iconStyle) iconStyle = get1(style, "IconStyle");
+             if (!labelStyle) labelStyle = get1(style, "LabelStyle");
+             if (!lineStyle) lineStyle = get1(style, "LineStyle");
+             if (!polyStyle) polyStyle = get1(style, "PolyStyle");
+           }
          }
 
-         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 (description) properties.description = description;
 
-           if (!extent) return null;
-           var bbox = extent.bbox();
-           bbox.segment = segment;
-           _segmentsBBoxes[segment.id] = bbox;
-           return bbox;
+         if (timeSpan) {
+           var begin = nodeVal(get1(timeSpan, "begin"));
+           var end = nodeVal(get1(timeSpan, "end"));
+           properties.timespan = {
+             begin: begin,
+             end: end
+           };
          }
 
-         function removeEntity(entity) {
-           _rtree.remove(_bboxes[entity.id]);
+         if (timeStamp) {
+           properties.timestamp = nodeVal(get1(timeStamp, "when"));
+         }
 
-           delete _bboxes[entity.id];
+         if (iconStyle) {
+           kmlColor(properties, iconStyle, "icon");
+           numericProperty(properties, iconStyle, "scale", "icon-scale");
+           numericProperty(properties, iconStyle, "heading", "icon-heading");
+           var hotspot = get1(iconStyle, "hotSpot");
 
-           if (_segmentsByWayId[entity.id]) {
-             _segmentsByWayId[entity.id].forEach(function (segment) {
-               _segmentsRTree.remove(_segmentsBBoxes[segment.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];
+           }
 
-               delete _segmentsBBoxes[segment.id];
-             });
+           var icon = get1(iconStyle, "Icon");
 
-             delete _segmentsByWayId[entity.id];
+           if (icon) {
+             var href = nodeVal(get1(icon, "href"));
+             if (href) properties.icon = href;
            }
          }
 
-         function loadEntities(entities) {
-           _rtree.load(entities.map(entityBBox));
+         if (labelStyle) {
+           kmlColor(properties, labelStyle, "label");
+           numericProperty(properties, labelStyle, "scale", "label-scale");
+         }
 
-           var segments = [];
-           entities.forEach(function (entity) {
-             if (entity.segments) {
-               var entitySegments = entity.segments(head); // cache these to make them easy to remove later
+         if (lineStyle) {
+           kmlColor(properties, lineStyle, "stroke");
+           numericProperty(properties, lineStyle, "width", "stroke-width");
+         }
 
-               _segmentsByWayId[entity.id] = entitySegments;
-               segments = segments.concat(entitySegments);
-             }
-           });
-           if (segments.length) _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean));
+         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 updateParents(entity, insertions, memo) {
-           head.parentWays(entity).forEach(function (way) {
-             if (_bboxes[way.id]) {
-               removeEntity(way);
-               insertions[way.id] = way;
-             }
+         if (extendedData) {
+           var datas = extendedData.getElementsByTagName("Data"),
+               simpleDatas = extendedData.getElementsByTagName("SimpleData");
 
-             updateParents(way, insertions, memo);
-           });
-           head.parentRelations(entity).forEach(function (relation) {
-             if (memo[entity.id]) return;
-             memo[entity.id] = true;
+           for (i = 0; i < datas.length; i++) {
+             properties[datas[i].getAttribute("name")] = nodeVal(get1(datas[i], "value"));
+           }
 
-             if (_bboxes[relation.id]) {
-               removeEntity(relation);
-               insertions[relation.id] = relation;
-             }
+           for (i = 0; i < simpleDatas.length; i++) {
+             properties[simpleDatas[i].getAttribute("name")] = nodeVal(simpleDatas[i]);
+           }
+         }
 
-             updateParents(relation, insertions, memo);
-           });
+         if (visibility) {
+           properties.visibility = nodeVal(visibility);
          }
 
-         tree.rebase = function (entities, force) {
-           var insertions = {};
+         if (geomsAndTimes.coordTimes.length) {
+           properties.coordinateProperties = {
+             times: geomsAndTimes.coordTimes.length === 1 ? geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes
+           };
+         }
 
-           for (var i = 0; i < entities.length; i++) {
-             var entity = entities[i];
-             if (!entity.visible) continue;
+         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;
+       }
 
-             if (head.entities.hasOwnProperty(entity.id) || _bboxes[entity.id]) {
-               if (!force) {
-                 continue;
-               } else if (_bboxes[entity.id]) {
-                 removeEntity(entity);
-               }
-             }
+       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];
+                 }
 
-             insertions[entity.id] = entity;
-             updateParents(entity, insertions, {});
+                 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"));
+                   }
+
+                   styleMapIndex["#" + styleMaps[l].getAttribute("id")] = pairsMap;
+                 }
+
+                 j = 0;
+
+               case 9:
+                 if (!(j < placemarks.length)) {
+                   _context3.next = 17;
+                   break;
+                 }
+
+                 feature = getPlacemark(placemarks[j], styleIndex, styleMapIndex, styleByHash);
+
+                 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);
+       }
 
-           loadEntities(Object.values(insertions));
-           return tree;
+       function kml(doc) {
+         return {
+           type: "FeatureCollection",
+           features: Array.from(kmlGen(doc))
          };
+       }
 
-         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 = {};
+       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 _vtService;
+
+         var _fileList;
 
-           if (changed.deletion) {
-             diff.deleted().forEach(function (entity) {
-               removeEntity(entity);
-             });
-           }
+         var _template;
 
-           if (changed.geometry) {
-             diff.modified().forEach(function (entity) {
-               removeEntity(entity);
-               insertions[entity.id] = entity;
-               updateParents(entity, insertions, {});
-             });
-           }
+         var _src;
 
-           if (changed.addition) {
-             diff.created().forEach(function (entity) {
-               insertions[entity.id] = entity;
-             });
+         function init() {
+           if (_initialized) return; // run once
+
+           _geojson = {};
+           _enabled = true;
+
+           function over(d3_event) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+             d3_event.dataTransfer.dropEffect = 'copy';
            }
 
-           loadEntities(Object.values(insertions));
-         } // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`
+           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;
 
-         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`
+             _vtService.event.on('loadedData', throttledRedraw);
+           } else if (!services.vectorTile && _vtService) {
+             _vtService = null;
+           }
 
+           return _vtService;
+         }
 
-         tree.waySegments = function (extent, graph) {
-           updateToGraph(graph);
-           return _segmentsRTree.search(extent.bbox()).map(function (bbox) {
-             return bbox.segment;
+         function showLayer() {
+           layerOn();
+           layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+             dispatch.call('change');
            });
-         };
+         }
 
-         return tree;
-       }
+         function hideLayer() {
+           throttledRedraw.cancel();
+           layer.transition().duration(250).style('opacity', 0).on('end', layerOff);
+         }
 
-       function uiModal(selection, blocking) {
-         var _this = this;
+         function layerOn() {
+           layer.style('display', 'block');
+         }
 
-         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 layerOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         } // ensure that all geojson features in a collection have IDs
 
-         shaded.close = function () {
-           shaded.transition().duration(200).style('opacity', 0).remove();
-           modal.transition().duration(200).style('top', '0px');
-           select(document).call(keybinding.unbind);
-         };
 
-         var modal = shaded.append('div').attr('class', 'modal fillL');
-         modal.append('input').attr('class', 'keytrap keytrap-first').on('focus.keytrap', moveFocusToLast);
+         function ensureIDs(gj) {
+           if (!gj) return null;
 
-         if (!blocking) {
-           shaded.on('click.remove-modal', function (d3_event) {
-             if (d3_event.target === _this) {
-               shaded.close();
+           if (gj.type === 'FeatureCollection') {
+             for (var i = 0; i < gj.features.length; i++) {
+               ensureFeatureID(gj.features[i]);
              }
-           });
-           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);
-         }
+           } else {
+             ensureFeatureID(gj);
+           }
 
-         modal.append('div').attr('class', 'content');
-         modal.append('input').attr('class', 'keytrap keytrap-last').on('focus.keytrap', moveFocusToFirst);
+           return gj;
+         } // ensure that each single Feature object has a unique ID
 
-         if (animate) {
-           shaded.transition().style('opacity', 1);
-         } else {
-           shaded.style('opacity', 1);
-         }
 
-         return shaded;
+         function ensureFeatureID(feature) {
+           if (!feature) return;
+           feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
+           return feature;
+         } // Prefer an array of Features instead of a FeatureCollection
 
-         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 (node) {
-             node.focus();
+         function getFeatures(gj) {
+           if (!gj) return [];
+
+           if (gj.type === 'FeatureCollection') {
+             return gj.features;
            } else {
-             select(this).node().blur();
+             return [gj];
            }
          }
 
-         function moveFocusToLast() {
-           var nodes = modal.selectAll('a, button, input:not(.keytrap), select, textarea').nodes();
+         function featureKey(d) {
+           return d.__featurehash__;
+         }
 
-           if (nodes.length) {
-             nodes[nodes.length - 1].focus();
-           } else {
-             select(this).node().blur();
-           }
+         function isPolygon(d) {
+           return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
          }
-       }
 
-       function uiLoading(context) {
-         var _modalSelection = select(null);
+         function clipPathID(d) {
+           return 'ideditor-data-' + d.__featurehash__ + '-clippath';
+         }
 
-         var _message = '';
-         var _blocking = false;
+         function featureClasses(d) {
+           return ['data' + d.__featurehash__, d.geometry.type, isPolygon(d) ? 'area' : '', d.__layerID__ || ''].filter(Boolean).join(' ');
+         }
 
-         var loading = function loading(selection) {
-           _modalSelection = uiModal(selection, _blocking);
+         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 loadertext = _modalSelection.select('.content').classed('loading-modal', true).append('div').attr('class', 'modal-section fillL');
+           var geoData, polygonData;
 
-           loadertext.append('img').attr('class', 'loader').attr('src', context.imagePath('loader-white.gif'));
-           loadertext.append('h3').html(_message);
+           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);
+           }
 
-           _modalSelection.select('button.close').attr('class', 'hide');
+           geoData = geoData.filter(getPath);
+           polygonData = geoData.filter(isPolygon); // Draw clip paths for polygons
 
-           return loading;
-         };
+           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
 
-         loading.message = function (val) {
-           if (!arguments.length) return _message;
-           _message = val;
-           return loading;
-         };
+           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
 
-         loading.blocking = function (val) {
-           if (!arguments.length) return _blocking;
-           _blocking = val;
-           return loading;
-         };
+           var pathData = {
+             fill: polygonData,
+             shadow: geoData,
+             stroke: geoData
+           };
+           var paths = datagroups.selectAll('path').data(function (layer) {
+             return pathData[layer];
+           }, featureKey); // exit
 
-         loading.close = function () {
-           _modalSelection.remove();
-         };
+           paths.exit().remove(); // enter/update
 
-         loading.isShown = function () {
-           return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
-         };
+           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
 
-         return loading;
-       }
+           layer.call(drawLabels, 'label-halo', geoData).call(drawLabels, 'label', geoData);
 
-       function coreHistory(context) {
-         var dispatch$1 = dispatch('reset', 'change', 'merge', 'restore', 'undone', 'redone');
+           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
 
-         var _lock = utilSessionMutex('lock'); // restorable if iD not open in another window/tab and a saved history exists in localStorage
+             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];
+             });
+           }
+         }
 
-         var _hasUnresolvedRestorableChanges = _lock.lock() && !!corePreferences(getKey('saved_history'));
+         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];
+         }
 
-         var duration = 150;
-         var _imageryUsed = [];
-         var _photoOverlaysUsed = [];
-         var _checkpoints = {};
+         function xmlToDom(textdata) {
+           return new DOMParser().parseFromString(textdata, 'text/xml');
+         }
 
-         var _pausedGraph;
+         function stringifyGeojsonProperties(feature) {
+           var properties = feature.properties;
 
-         var _stack;
+           for (var key in properties) {
+             var property = properties[key];
 
-         var _index;
+             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);
+             }
+           }
+         }
 
-         var _tree; // internal _act, accepts list of actions and eased time
+         drawData.setFile = function (extension, data) {
+           _template = null;
+           _fileList = null;
+           _geojson = null;
+           _src = null;
+           var gj;
 
+           switch (extension) {
+             case '.gpx':
+               gj = gpx(xmlToDom(data));
+               break;
 
-         function _act(actions, t) {
-           actions = Array.prototype.slice.call(actions);
-           var annotation;
+             case '.kml':
+               gj = kml(xmlToDom(data));
+               break;
 
-           if (typeof actions[actions.length - 1] !== 'function') {
-             annotation = actions.pop();
-           }
+             case '.geojson':
+             case '.json':
+               gj = JSON.parse(data);
 
-           var graph = _stack[_index].graph;
+               if (gj.type === 'FeatureCollection') {
+                 gj.features.forEach(stringifyGeojsonProperties);
+               } else if (gj.type === 'Feature') {
+                 stringifyGeojsonProperties(gj);
+               }
 
-           for (var i = 0; i < actions.length; i++) {
-             graph = actions[i](graph, t);
+               break;
            }
 
-           return {
-             graph: graph,
-             annotation: annotation,
-             imageryUsed: _imageryUsed,
-             photoOverlaysUsed: _photoOverlaysUsed,
-             transform: context.projection.transform(),
-             selectedIDs: context.selectedIDs()
-           };
-         } // internal _perform with eased time
+           gj = gj || {};
 
+           if (Object.keys(gj).length) {
+             _geojson = ensureIDs(gj);
+             _src = extension + ' data file';
+             this.fitZoom();
+           }
 
-         function _perform(args, t) {
-           var previous = _stack[_index].graph;
-           _stack = _stack.slice(0, _index + 1);
+           dispatch.call('change');
+           return this;
+         };
 
-           var actionResult = _act(args, t);
+         drawData.showLabels = function (val) {
+           if (!arguments.length) return _showLabels;
+           _showLabels = val;
+           return this;
+         };
 
-           _stack.push(actionResult);
+         drawData.enabled = function (val) {
+           if (!arguments.length) return _enabled;
+           _enabled = val;
 
-           _index++;
-           return change(previous);
-         } // internal _replace with eased time
+           if (_enabled) {
+             showLayer();
+           } else {
+             hideLayer();
+           }
 
+           dispatch.call('change');
+           return this;
+         };
 
-         function _replace(args, t) {
-           var previous = _stack[_index].graph; // assert(_index == _stack.length - 1)
+         drawData.hasData = function () {
+           var gj = _geojson || {};
+           return !!(_template || Object.keys(gj).length);
+         };
 
-           var actionResult = _act(args, t);
+         drawData.template = function (val, src) {
+           if (!arguments.length) return _template; // test source against OSM imagery blocklists..
 
-           _stack[_index] = actionResult;
-           return change(previous);
-         } // internal _overwrite with eased time
+           var osm = context.connection();
 
+           if (osm) {
+             var blocklists = osm.imageryBlocklists();
+             var fail = false;
+             var tested = 0;
+             var regex;
 
-         function _overwrite(args, t) {
-           var previous = _stack[_index].graph;
+             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 (_index > 0) {
-             _index--;
 
-             _stack.pop();
+             if (!tested) {
+               regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
+               fail = regex.test(val);
+             }
            }
 
-           _stack = _stack.slice(0, _index + 1);
+           _template = val;
+           _fileList = null;
+           _geojson = null; // strip off the querystring/hash from the template,
+           // it often includes the access token
 
-           var actionResult = _act(args, t);
+           _src = src || 'vectortile:' + val.split(/[?#]/)[0];
+           dispatch.call('change');
+           return this;
+         };
 
-           _stack.push(actionResult);
+         drawData.geojson = function (gj, src) {
+           if (!arguments.length) return _geojson;
+           _template = null;
+           _fileList = null;
+           _geojson = null;
+           _src = null;
+           gj = gj || {};
 
-           _index++;
-           return change(previous);
-         } // determine difference and dispatch a change event
+           if (Object.keys(gj).length) {
+             _geojson = ensureIDs(gj);
+             _src = src || 'unknown.geojson';
+           }
 
+           dispatch.call('change');
+           return this;
+         };
 
-         function change(previous) {
-           var difference = coreDifference(previous, history.graph());
+         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 (!_pausedGraph) {
-             dispatch$1.call('change', this, difference);
-           }
+           reader.onload = function () {
+             return function (e) {
+               drawData.setFile(extension, e.target.result);
+             };
+           }();
 
-           return difference;
-         } // iD uses namespaced keys so multiple installations do not conflict
+           reader.readAsText(f);
+           return this;
+         };
 
+         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 getKey(n) {
-           return 'iD_' + window.location.origin + '_' + n;
-         }
+           var testUrl = url.split(/[?#]/)[0];
+           var extension = getExtension(testUrl) || defaultExtension;
 
-         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;
+           if (extension) {
+             _template = null;
+             d3_text(url).then(function (data) {
+               drawData.setFile(extension, data);
+             })["catch"](function () {
+               /* ignore */
              });
+           } else {
+             drawData.template(url);
+           }
 
-             _stack[0].graph.rebase(entities, stack, false);
-
-             _tree.rebase(entities, false);
-
-             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];
+           return this;
+         };
 
-             if (arguments.length === 1 || arguments.length === 2 && typeof arguments[1] !== 'function') {
-               transitionable = !!action0.transitionable;
-             }
+         drawData.getSrc = function () {
+           return _src || '';
+         };
 
-             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;
+         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 */
 
-             if (isNaN(+n) || +n < 0) {
-               n = 1;
-             }
+             switch (geom.type) {
+               case 'Point':
+                 c = [c];
 
-             while (n-- > 0 && _index > 0) {
-               _index--;
+               case 'MultiPoint':
+               case 'LineString':
+                 break;
 
-               _stack.pop();
+               case 'MultiPolygon':
+                 c = utilArrayFlatten(c);
+
+               case 'Polygon':
+               case 'MultiLineString':
+                 c = utilArrayFlatten(c);
+                 break;
              }
+             /* eslint-enable no-fallthrough */
 
-             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;
 
-             while (_index > 0) {
-               _index--;
-               if (_stack[_index].annotation) break;
-             }
+             return utilArrayUnion(coords, c);
+           }, []);
 
-             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;
+           if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
+             var extent = geoExtent(d3_geoBounds({
+               type: 'LineString',
+               coordinates: coords
+             }));
+             map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
+           }
 
-             while (tryIndex < _stack.length - 1) {
-               tryIndex++;
+           return this;
+         };
 
-               if (_stack[tryIndex].annotation) {
-                 _index = tryIndex;
-                 dispatch$1.call('redone', this, _stack[_index], previousStack);
-                 break;
-               }
-             }
+         init();
+         return drawData;
+       }
 
-             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;
+       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 = [];
 
-             while (i >= 0) {
-               if (_stack[i].annotation) return _stack[i].annotation;
-               i--;
-             }
-           },
-           redoAnnotation: function redoAnnotation() {
-             var i = _index + 1;
+           if (showTile) {
+             debugData.push({
+               "class": 'red',
+               label: 'tile'
+             });
+           }
 
-             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 (showCollision) {
+             debugData.push({
+               "class": 'yellow',
+               label: 'collision'
+             });
+           }
 
-             if (action) {
-               head = action(head);
-             }
+           if (showImagery) {
+             debugData.push({
+               "class": 'orange',
+               label: 'imagery'
+             });
+           }
 
-             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 (showTouchTargets) {
+             debugData.push({
+               "class": 'pink',
+               label: 'touchTargets'
+             });
+           }
 
-               _stack.slice(1, _index + 1).forEach(function (state) {
-                 state.imageryUsed.forEach(function (source) {
-                   if (source !== 'Custom') {
-                     s.add(source);
-                   }
-                 });
-               });
+           if (showDownloaded) {
+             debugData.push({
+               "class": 'purple',
+               label: 'downloaded'
+             });
+           }
 
-               return Array.from(s);
-             }
-           },
-           photoOverlaysUsed: function photoOverlaysUsed(sources) {
-             if (sources) {
-               _photoOverlaysUsed = sources;
-               return history;
-             } else {
-               var s = new Set();
+           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
 
-               _stack.slice(1, _index + 1).forEach(function (state) {
-                 if (state.photoOverlaysUsed && Array.isArray(state.photoOverlaysUsed)) {
-                   state.photoOverlaysUsed.forEach(function (photoOverlay) {
-                     s.add(photoOverlay);
-                   });
+           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
+
+           var osm = context.connection();
+           var dataDownloaded = [];
+
+           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]]]
                  }
-               });
+               };
+             });
+           }
 
-               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 = {};
-             }
+           var downloaded = layer.selectAll('path.debug-downloaded').data(showDownloaded ? dataDownloaded : []);
+           downloaded.exit().remove();
+           downloaded.enter().append('path').attr('class', 'debug-downloaded debug purple'); // update
 
-             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..
+           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.
 
-             Object.values(graph.base().entities).forEach(function (entity) {
-               var copy = copyIntroEntity(entity);
-               baseEntities[copy.id] = copy;
-             }); // replace base entities with head entities..
 
-             Object.keys(graph.entities).forEach(function (id) {
-               var entity = graph.entities[id];
+         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 (entity) {
-                 var copy = copyIntroEntity(entity);
-                 baseEntities[copy.id] = copy;
-               } else {
-                 delete baseEntities[id];
-               }
-             }); // swap temporary for permanent ids..
+         return drawDebug;
+       }
 
-             Object.values(baseEntities).forEach(function (entity) {
-               if (Array.isArray(entity.nodes)) {
-                 entity.nodes = entity.nodes.map(function (node) {
-                   return permIDs[node] || node;
-                 });
-               }
+       /*
+           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.
+       */
 
-               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 svgDefs(context) {
+         var _defsSelection = select(null);
 
-             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`
+         var _spritesheetIds = ['iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'community-sprite'];
 
-               if (copy.tags && !Object.keys(copy.tags)) {
-                 delete copy.tags;
-               }
+         function drawDefs(selection) {
+           _defsSelection = selection.append('defs'); // add markers
 
-               if (Array.isArray(copy.loc)) {
-                 copy.loc[0] = +copy.loc[0].toFixed(6);
-                 copy.loc[1] = +copy.loc[1].toFixed(6);
-               }
+           _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 match = source.id.match(/([nrw])-\d*/); // temporary id
 
-               if (match !== null) {
-                 var nrw = match[1];
-                 var permID;
+           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);
+           }
 
-                 do {
-                   permID = nrw + ++nextID[nrw];
-                 } while (baseEntities.hasOwnProperty(permID));
+           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
 
-                 copy.id = permIDs[source.id] = permID;
-               }
+           addSidedMarker('coastline', '#77dede', 1);
+           addSidedMarker('waterway', '#77dede', 1); // barriers have a dashed line, and separating the triangle
+           // from the line visually suits that
 
-               return copy;
-             }
-           },
-           toJSON: function toJSON() {
-             if (!this.hasChanges()) return;
-             var allEntities = {};
-             var baseEntities = {};
-             var base = _stack[0];
+           addSidedMarker('barrier', '#ddd', 1);
+           addSidedMarker('man_made', '#fff', 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];
+           _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 (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.
+           _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 (id in base.graph.entities) {
-                   baseEntities[id] = base.graph.entities[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 (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
+           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
 
+           _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
 
-                 var baseParents = base.graph._parentWays[id];
 
-                 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;
-             });
+           addSprites(_spritesheetIds, true);
+         }
 
-             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()
+         function addSprites(ids, overrideColors) {
+           _spritesheetIds = utilArrayUniq(_spritesheetIds.concat(ids));
+
+           var spritesheets = _defsSelection.selectAll('.spritesheet').data(_spritesheetIds);
+
+           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 */
              });
-           },
-           fromJSON: function fromJSON(json, loadChildNodes) {
-             var h = JSON.parse(json);
-             var loadComplete = true;
-             osmEntity.id.next = h.nextIDs;
-             _index = h.index;
+           });
+           spritesheets.exit().remove();
+         }
 
-             if (h.version === 2 || h.version === 3) {
-               var allEntities = {};
-               h.entities.forEach(function (entity) {
-                 allEntities[osmEntity.key(entity)] = osmEntity(entity);
-               });
+         drawDefs.addSprites = addSprites;
+         return drawDefs;
+       }
 
-               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);
-                 });
+       var _layerEnabled$2 = false;
 
-                 var stack = _stack.map(function (state) {
-                   return state.graph;
-                 });
+       var _qaService$2;
 
-                 _stack[0].graph.rebase(baseEntities, stack, true);
+       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;
+
+         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.
+
+
+         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;
+           }
 
-                 _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
+           return _qaService$2;
+         } // Show the markers
 
 
-                 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);
-                   });
+         function editOn() {
+           if (!layerVisible) {
+             layerVisible = true;
+             drawLayer.style('display', 'block');
+           }
+         } // Immediately remove the markers and their touch targets
 
-                   if (missing.length && osm) {
-                     loadComplete = false;
-                     context.map().redrawEnable(false);
-                     var loading = uiLoading(context).blocking(true);
-                     context.container().call(loading);
 
-                     var childNodesLoaded = function childNodesLoaded(err, result) {
-                       if (!err) {
-                         var visibleGroups = utilArrayGroupBy(result.data, 'visible');
-                         var visibles = visibleGroups["true"] || []; // alive nodes
+         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.
 
-                         var invisibles = visibleGroups["false"] || []; // deleted nodes
 
-                         if (visibles.length) {
-                           var visibleIDs = visibles.map(function (entity) {
-                             return entity.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.
 
-                           var stack = _stack.map(function (state) {
-                             return state.graph;
-                           });
 
-                           missing = utilArrayDifference(missing, visibleIDs);
+         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
 
-                           _stack[0].graph.rebase(visibles, stack, true);
 
-                           _tree.rebase(visibles, true);
-                         } // fetch older versions of nodes that were deleted..
+         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..
 
+           var markers = drawLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-                         invisibles.forEach(function (entity) {
-                           osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
-                         });
-                       }
+           markers.exit().remove(); // enter
 
-                       if (err || !missing.length) {
-                         loading.close();
-                         context.map().redrawEnable(true);
-                         dispatch$1.call('change');
-                         dispatch$1.call('restore', this);
-                       }
-                     };
+           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
 
-                     osm.loadMultiple(missing, childNodesLoaded);
-                   }
-                 }
-               }
+           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+             return d.id === selectedID;
+           }).attr('transform', getTransform); // Draw targets..
 
-               _stack = h.stack.map(function (d) {
-                 var entities = {},
-                     entity;
+           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 (d.modified) {
-                   d.modified.forEach(function (key) {
-                     entity = allEntities[key];
-                     entities[entity.id] = entity;
-                   });
-                 }
+           targets.exit().remove(); // enter/update
 
-                 if (d.deleted) {
-                   d.deleted.forEach(function (id) {
-                     entities[id] = undefined;
-                   });
-                 }
+           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);
 
-                 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 = {};
+           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 in d.entities) {
-                   var entity = d.entities[i];
-                   entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
-                 }
 
-                 d.graph = coreGraph(_stack[0].graph).load(entities);
-                 return d;
-               });
-             }
+         function drawKeepRight(selection) {
+           var service = getService();
+           var surface = context.surface();
 
-             var transform = _stack[_index].transform;
+           if (surface && !surface.empty()) {
+             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+           }
 
-             if (transform) {
-               context.map().transformEase(transform, 0); // 0 = immediate, no easing
-             }
+           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);
 
-             if (loadComplete) {
-               dispatch$1.call('change');
-               dispatch$1.call('restore', this);
+           if (_layerEnabled$2) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               service.loadIssues(projection);
+               updateMarkers();
+             } else {
+               editOff();
              }
+           }
+         } // Toggles the layer on and off
 
-             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);
-             }
 
-             return history;
-           },
-           // delete the history version saved in localStorage
-           clearSaved: function clearSaved() {
-             context.debouncedSave.cancel();
+         drawKeepRight.enabled = function (val) {
+           if (!arguments.length) return _layerEnabled$2;
+           _layerEnabled$2 = val;
 
-             if (_lock.locked()) {
-               _hasUnresolvedRestorableChanges = false;
-               corePreferences(getKey('saved_history'), null); // clear the changeset metadata associated with the saved history
+           if (_layerEnabled$2) {
+             layerOn();
+           } else {
+             layerOff();
 
-               corePreferences('comment', null);
-               corePreferences('hashtags', null);
-               corePreferences('source', null);
+             if (context.selectedErrorID()) {
+               context.enter(modeBrowse(context));
              }
+           }
 
-             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
+           dispatch.call('change');
+           return this;
          };
-         history.reset();
-         return utilRebind(history, dispatch$1, 'on');
+
+         drawKeepRight.supported = function () {
+           return !!getService();
+         };
+
+         return drawKeepRight;
        }
 
-       /**
-        * Look for roads that can be connected to other roads with a short extension
-        */
+       function svgGeolocate(projection) {
+         var layer = select(null);
 
-       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 _position;
 
-         var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS; // Comes from considering bounding case of perpendicular ways
+         function init() {
+           if (svgGeolocate.initialized) return; // run once
 
-         var SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);
+           svgGeolocate.enabled = false;
+           svgGeolocate.initialized = true;
+         }
 
-         function isHighway(entity) {
-           return entity.type === 'way' && osmRoutableHighwayTagValues[entity.tags.highway];
+         function showLayer() {
+           layer.style('display', 'block');
          }
 
-         function isTaggedAsNotContinuing(node) {
-           return node.tags.noexit === 'yes' || node.tags.amenity === 'parking_entrance' || node.tags.entrance && node.tags.entrance !== 'no';
+         function hideLayer() {
+           layer.transition().duration(250).style('opacity', 0);
          }
 
-         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 layerOn() {
+           layer.style('opacity', 0).transition().duration(250).style('opacity', 1);
+         }
 
-                 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;
+         function layerOff() {
+           layer.style('display', 'none');
+         }
 
-           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');
+         function transform(d) {
+           return svgPointTransform(projection)(d);
+         }
 
-                 var _this$issue$entityIds = _slicedToArray(this.issue.entityIds, 3),
-                     endNodeId = _this$issue$entityIds[1],
-                     crossWayId = _this$issue$entityIds[2];
+         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 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)
+           return Math.round(projectedLoc[1] - projectedTangent[1]).toString();
+         }
 
-                 var nearEndNodes = findNearbyEndNodes(endNode, crossWay);
+         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));
+         }
 
-                 if (nearEndNodes.length > 0) {
-                   var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);
+         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 (collinear) {
-                     context.perform(actionMergeNodes([collinear.id, endNode.id], collinear.loc), annotation);
-                     return;
-                   }
-                 }
+           if (enabled) {
+             update();
+           } else {
+             layerOff();
+           }
+         }
 
-                 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
+         drawLocation.enabled = function (position, enabled) {
+           if (!arguments.length) return svgGeolocate.enabled;
+           _position = position;
+           svgGeolocate.enabled = enabled;
 
-                 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 (svgGeolocate.enabled) {
+             showLayer();
+             layerOn();
+           } else {
+             hideLayer();
+           }
 
-             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'));
-                 }
-               }));
-             }
+           return this;
+         };
 
-             return fixes;
-           }
+         init();
+         return drawLocation;
+       }
 
-           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'));
-           }
+       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;
 
-           function isExtendableCandidate(node, way) {
-             // can not accurately test vertices on tiles not downloaded from osm - #5938
-             var osm = services.osm;
+         var _rdrawn = new RBush();
 
-             if (osm && !osm.isDataLoaded(node.loc)) {
-               return false;
-             }
+         var _rskipped = new RBush();
 
-             if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
-               return false;
-             }
+         var _textWidthCache = {};
+         var _entitybboxes = {}; // Listed from highest to lowest priority
 
-             var occurrences = 0;
+         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]];
 
-             for (var index in way.nodes) {
-               if (way.nodes[index] === node.id) {
-                 occurrences += 1;
+         function shouldSkipIcon(preset) {
+           var noIcons = ['building', 'landuse', 'natural'];
+           return noIcons.some(function (s) {
+             return preset.id.indexOf(s) >= 0;
+           });
+         }
 
-                 if (occurrences > 1) {
-                   return false;
-                 }
-               }
-             }
+         function get(array, prop) {
+           return function (d, i) {
+             return array[i][prop];
+           };
+         }
 
-             return true;
+         function textWidth(text, size, elem) {
+           var c = _textWidthCache[size];
+           if (!c) c = _textWidthCache[size] = {};
+
+           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 (str === null) {
+               return size / 3 * 2 * text.length;
+             } else {
+               return size / 3 * (2 * text.length + str.length);
+             }
            }
+         }
 
-           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
+         function drawLinePaths(selection, entities, filter, classes, labels) {
+           var paths = selection.selectAll('path').filter(filter).data(entities, osmEntity.key); // exit
 
-               testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc); // don't flag issue if connecting the ways would cause self-intersection
+           paths.exit().remove(); // enter/update
 
-               if (geoHasSelfIntersections(testNodes, nodeID)) return;
-               results.push(connectionInfo);
-             });
-             return results;
-           }
+           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 drawLineLabels(selection, entities, filter, classes, labels) {
+           var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
+
+           texts.exit().remove(); // enter
+
+           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
+
+           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);
+         }
+
+         function drawPointLabels(selection, entities, filter, classes, labels) {
+           var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
+
+           texts.exit().remove(); // enter/update
+
+           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 drawAreaLabels(selection, entities, filter, classes, labels) {
+           entities = entities.filter(hasText);
+           labels = labels.filter(hasText);
+           drawPointLabels(selection, entities, filter, classes, labels);
 
-           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 hasText(d, i) {
+             return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
            }
+         }
 
-           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 drawAreaIcons(selection, entities, filter, classes, labels) {
+           var icons = selection.selectAll('use.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-             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);
+           icons.exit().remove(); // enter/update
 
-               if (diff < minAngle) {
-                 joinTo = endNode;
-                 minAngle = diff;
-               }
-             });
-             /* Threshold set by considering right angle triangle
-             based on node joining threshold and extension distance */
+           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;
 
-             if (minAngle <= SIG_ANGLE_TH) return joinTo;
-             return null;
-           }
+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return '#' + picon + (isMaki ? '-15' : '');
+             }
+           });
+         }
 
-           function hasTag(tags, key) {
-             return tags[key] !== undefined && tags[key] !== 'no';
+         function drawCollisionBoxes(selection, rtree, which) {
+           var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
+           var gj = [];
+
+           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]]]
+               };
+             });
            }
 
-           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
+           var boxes = selection.selectAll('.' + which).data(gj); // exit
 
-             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
+           boxes.exit().remove(); // enter/update
 
-             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;
-           }
+           boxes.enter().append('path').attr('class', classes).merge(boxes).attr('d', d3_geoPath());
+         }
 
-           function canConnectByExtend(way, endNodeIdx) {
-             var tipNid = way.nodes[endNodeIdx]; // the 'tip' node for extension point
+         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;
 
-             var midNid = endNodeIdx === 0 ? way.nodes[1] : way.nodes[way.nodes.length - 2]; // the other node of the edge
+           for (i = 0; i < labelStack.length; i++) {
+             labelable.push([]);
+           }
 
-             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 (fullRedraw) {
+             _rdrawn.clear();
 
-             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
+             _rskipped.clear();
 
-             var segmentInfos = tree.waySegments(queryExtent, graph);
+             _entitybboxes = {};
+           } else {
+             for (i = 0; i < entities.length; i++) {
+               entity = entities[i];
+               var toRemove = [].concat(_entitybboxes[entity.id] || []).concat(_entitybboxes[entity.id + 'I'] || []);
 
-             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]);
+               for (j = 0; j < toRemove.length; j++) {
+                 _rdrawn.remove(toRemove[j]);
 
-               if (crossLoc) {
-                 return {
-                   mid: midNode,
-                   node: tipNode,
-                   wid: way2.id,
-                   edge: [nA.id, nB.id],
-                   cross_loc: crossLoc
-                 };
+                 _rskipped.remove(toRemove[j]);
                }
              }
+           } // Loop through all the entities to do some preprocessing
 
-             return null;
-           }
-         };
 
-         validation.type = type;
-         return validation;
-       }
+           for (i = 0; i < entities.length; i++) {
+             entity = entities[i];
+             geometry = entity.geometry(graph); // Insert collision boxes around interesting points/vertices
 
-       function validationCloseNodes(context) {
-         var type = 'close_nodes';
-         var pointThresholdMeters = 0.2;
+             if (geometry === 'point' || geometry === 'vertex' && isInterestingVertex(entity)) {
+               var hasDirections = entity.directions(graph, projection).length;
+               var markerPadding;
 
-         var validation = function validation(entity, graph) {
-           if (entity.type === 'node') {
-             return getIssuesForNode(entity);
-           } else if (entity.type === 'way') {
-             return getIssuesForWay(entity);
-           }
+               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;
+               }
 
-           return [];
+               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
 
-           function getIssuesForNode(node) {
-             var parentWays = graph.parentWays(node);
 
-             if (parentWays.length) {
-               return getIssuesForVertex(node, parentWays);
-             } else {
-               return getIssuesForDetachedPoint(node);
-             }
-           }
+             if (geometry === 'vertex') {
+               geometry = 'point';
+             } // Determine which entities are label-able
 
-           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';
+             var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
+             var icon = preset && !shouldSkipIcon(preset) && preset.icon;
+             if (!icon && !utilDisplayName(entity)) continue;
 
-               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';
+             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;
                }
              }
-
-             return 'other';
            }
 
-           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
+           var positions = {
+             point: [],
+             line: [],
+             area: []
+           };
+           var labelled = {
+             point: [],
+             line: [],
+             area: []
+           }; // Try and find a valid label for labellable entities
 
-             if (hypotenuseMeters < 1.5) return false;
-             return true;
-           }
+           for (k = 0; k < labelable.length; k++) {
+             var fontSize = labelStack[k][3];
 
-           function getIssuesForWay(way) {
-             if (!shouldCheckWay(way)) return [];
-             var issues = [],
-                 nodes = graph.childNodes(way);
+             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;
 
-             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);
-             }
+               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 issues;
-           }
+               if (p) {
+                 if (geometry === 'vertex') {
+                   geometry = 'point';
+                 } // treat vertex like point
 
-           function getIssuesForVertex(node, parentWays) {
-             var issues = [];
 
-             function checkForCloseness(node1, node2, way) {
-               var issue = getWayIssueIfAny(node1, node2, way);
-               if (issue) issues.push(issue);
+                 p.classes = geometry + ' tag-' + labelStack[k][1];
+                 positions[geometry].push(p);
+                 labelled[geometry].push(entity);
+               }
              }
+           }
 
-             for (var i = 0; i < parentWays.length; i++) {
-               var parentWay = parentWays[i];
-               if (!shouldCheckWay(parentWay)) continue;
-               var lastIndex = parentWay.nodes.length - 1;
+           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;
+             });
+           }
 
-               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);
-                   }
-                 }
+           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..
 
-                 if (j !== lastIndex) {
-                   if (parentWay.nodes[j + 1] === node.id) {
-                     checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);
-                   }
-                 }
-               }
+             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
+               };
              }
 
-             return issues;
+             if (tryInsert([bbox], entity.id, true)) {
+               return p;
+             }
            }
 
-           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
+           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
 
-             if (wayType === 'boundary') return 0; // expect some features to be mapped with higher levels of detail
+             var lineOffsets = [50, 45, 55, 40, 60, 35, 65, 30, 70, 25, 75, 20, 80, 15, 95, 10, 90, 5, 95];
+             var padding = 3;
 
-             if (wayType === 'indoor') return 0.01;
-             if (wayType === 'building') return 0.05;
-             if (wayType === 'path') return 0.1;
-             return 0.2;
-           }
+             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.
 
-           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);
+               var sub = subpath(points, start, start + width);
 
-             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;
+               if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
+                 continue;
+               }
 
-               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;
+               var isReverse = reverse(sub);
 
-                 for (var key in zAxisKeys) {
-                   var nodeValue = node.tags[key] || '0';
-                   var nearbyValue = nearby.tags[key] || '0';
+               if (isReverse) {
+                 sub = sub.reverse();
+               }
 
-                   if (nodeValue !== nearbyValue) {
-                     zAxisDifferentiates = true;
-                     break;
-                   }
+               var bboxes = [];
+               var boxsize = (height + 2) / 2;
+
+               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
+
+                 var num = Math.max(1, Math.floor(geoVecLength(a, b) / boxsize / 2));
+
+                 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)
+                   });
                  }
+               }
 
-                 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 (tryInsert(bboxes, entity.id, false)) {
+                 // accept this one
+                 return {
+                   'font-size': height + 2,
+                   lineString: lineString(sub),
+                   startOffset: offset + '%'
+                 };
                }
              }
 
-             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 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);
              }
-           }
 
-           function getWayIssueIfAny(node1, node2, way) {
-             if (node1.id === node2.id || node1.hasInterestingTags() && node2.hasInterestingTags()) {
-               return null;
+             function lineString(points) {
+               return 'M' + points.join('L');
              }
 
-             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 subpath(points, from, to) {
+               var sofar = 0;
+               var start, end, i0, i1;
 
-             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')
-                 })];
+               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 (!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;
+                 }
+
+                 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;
                }
-             });
 
-             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);
+               var result = points.slice(i0, i1);
+               result.unshift(start);
+               result.push(end);
+               return result;
              }
            }
-         };
 
-         validation.type = type;
-         return validation;
-       }
+           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 = {};
 
-       function validationCrossingWays(context) {
-         var type = 'crossing_ways'; // returns the way or its parent relation, whichever has a useful feature type
+             if (picon) {
+               // icon and label..
+               if (addIcon()) {
+                 addLabel(iconSize + padding);
+                 return p;
+               }
+             } else {
+               // label only..
+               if (addLabel(0)) {
+                 return p;
+               }
+             }
 
-         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);
+             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
+               };
 
-             for (var i = 0; i < parentRels.length; i++) {
-               var rel = parentRels[i];
+               if (tryInsert([bbox], entity.id + 'I', true)) {
+                 p.transform = 'translate(' + iconX + ',' + iconY + ')';
+                 return true;
+               }
 
-               if (getFeatureType(rel, graph) !== null) {
-                 return rel;
+               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
+                 };
+
+                 if (tryInsert([bbox], entity.id, true)) {
+                   p.x = labelX;
+                   p.y = labelY;
+                   p.textAnchor = 'middle';
+                   p.height = height;
+                   return true;
+                 }
                }
+
+               return false;
              }
-           }
+           } // force insert a singular bounding box
+           // singular box only, no array, id better be unique
 
-           return way;
-         }
 
-         function hasTag(tags, key) {
-           return tags[key] !== undefined && tags[key] !== 'no';
-         }
+           function doInsert(bbox, id) {
+             bbox.id = id;
+             var oldbox = _entitybboxes[id];
 
-         function taggedAsIndoor(tags) {
-           return hasTag(tags, 'indoor') || hasTag(tags, 'level') || tags.highway === 'corridor';
-         }
+             if (oldbox) {
+               _rdrawn.remove(oldbox);
+             }
 
-         function allowsBridge(featureType) {
-           return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
-         }
+             _entitybboxes[id] = bbox;
 
-         function allowsTunnel(featureType) {
-           return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
-         } // discard
+             _rdrawn.insert(bbox);
+           }
 
+           function tryInsert(bboxes, id, saveSkipped) {
+             var skipped = false;
 
-         var ignoredBuildings = {
-           demolished: true,
-           dismantled: true,
-           proposed: true,
-           razed: true
-         };
+             for (var i = 0; i < bboxes.length; i++) {
+               var bbox = bboxes[i];
+               bbox.id = id; // Check that label is visible
 
-         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 (bbox.minX < 0 || bbox.minY < 0 || bbox.maxX > dimensions[0] || bbox.maxY > dimensions[1]) {
+                 skipped = true;
+                 break;
+               }
 
-           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;
-         }
+               if (_rdrawn.collides(bbox)) {
+                 skipped = true;
+                 break;
+               }
+             }
 
-         function isLegitCrossing(tags1, featureType1, tags2, featureType2) {
-           // assume 0 by default
-           var level1 = tags1.level || '0';
-           var level2 = tags2.level || '0';
+             _entitybboxes[id] = bboxes;
 
-           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
+             if (skipped) {
+               if (saveSkipped) {
+                 _rskipped.load(bboxes);
+               }
+             } else {
+               _rdrawn.load(bboxes);
+             }
 
+             return !skipped;
+           }
 
-           var layer1 = tags1.layer || '0';
-           var layer2 = tags2.layer || '0';
+           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 (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
+           drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
+           drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point); // lines
 
-             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;
+           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
 
-           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
+           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
 
-             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
+           drawCollisionBoxes(debug, _rskipped, 'debug-skipped');
+           drawCollisionBoxes(debug, _rdrawn, 'debug-drawn');
+           layer.call(filterLabels);
+         }
 
+         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 (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') return true;
-           if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') return true;
+           if (mouse) {
+             pad = 20;
+             bbox = {
+               minX: mouse[0] - pad,
+               minY: mouse[1] - pad,
+               maxX: mouse[0] + pad,
+               maxY: mouse[1] + pad
+             };
 
-           if (featureType1 === 'building' || featureType2 === 'building') {
-             // for building crossings, different layers are enough
-             if (layer1 !== layer2) return true;
-           }
+             var nearMouse = _rdrawn.search(bbox).map(function (entity) {
+               return entity.id;
+             });
 
-           return false;
-         } // highway values for which we shouldn't recommend connecting to waterways
+             ids.push.apply(ids, nearMouse);
+           } // hide labels on selected nodes (they look weird when dragging / haloed)
 
 
-         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
-         };
+           for (var i = 0; i < selectedIDs.length; i++) {
+             var entity = graph.hasEntity(selectedIDs[i]);
 
-         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 (entity && entity.type === 'node') {
+               ids.push(selectedIDs[i]);
+             }
+           }
 
-           if (featureType1 === featureType2) {
-             if (featureType1 === 'highway') {
-               var entity1IsPath = osmPathHighwayTagValues[entity1.tags.highway];
-               var entity2IsPath = osmPathHighwayTagValues[entity2.tags.highway];
+           layers.selectAll(utilEntitySelector(ids)).classed('nolabel', true); // draw the mouse bbox if debugging is on..
 
-               if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
-                 // one feature is a path but not both
-                 var roadFeature = entity1IsPath ? entity2 : entity1;
+           var debug = selection.selectAll('.labels-group.debug');
+           var gj = [];
 
-                 if (nonCrossingHighways[roadFeature.tags.highway]) {
-                   // don't mark path connections with certain roads as crossings
-                   return {};
-                 }
+           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]]]
+             }] : [];
+           }
 
-                 var pathFeature = entity1IsPath ? entity1 : entity2;
+           var box = debug.selectAll('.debug-mouse').data(gj); // exit
 
-                 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
+           box.exit().remove(); // enter/update
 
+           box.enter().append('path').attr('class', 'debug debug-mouse yellow').merge(box).attr('d', d3_geoPath());
+         }
 
-                 return bothLines ? {
-                   highway: 'crossing'
-                 } : {};
-               }
+         var throttleFilterLabels = throttle(filterLabels, 100);
 
-               return {};
-             }
+         drawLabels.observe = function (selection) {
+           var listener = function listener() {
+             throttleFilterLabels(selection);
+           };
 
-             if (featureType1 === 'waterway') return {};
-             if (featureType1 === 'railway') return {};
-           } else {
-             var featureTypes = [featureType1, featureType2];
+           selection.on('mousemove.hidelabels', listener);
+           context.on('enter.hidelabels', listener);
+         };
 
-             if (featureTypes.indexOf('highway') !== -1) {
-               if (featureTypes.indexOf('railway') !== -1) {
-                 if (!bothLines) return {};
-                 var isTram = entity1.tags.railway === 'tram' || entity2.tags.railway === 'tram';
+         drawLabels.off = function (selection) {
+           throttleFilterLabels.cancel();
+           selection.on('mousemove.hidelabels', null);
+           context.on('enter.hidelabels', null);
+         };
 
-                 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 drawLabels;
+       }
 
-                   return {
-                     railway: 'crossing'
-                   };
-                 } else {
-                   // path-tram connections use this tag
-                   if (isTram) return {
-                     railway: 'tram_level_crossing'
-                   }; // other road-rail connections use this tag
+       var _layerEnabled$1 = false;
 
-                   return {
-                     railway: 'level_crossing'
-                   };
-                 }
-               }
+       var _qaService$1;
 
-               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;
+       function svgImproveOSM(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           return dispatch.call('change');
+         }, 1000);
 
-                 if (highwaysDisallowingFords[entity1.tags.highway] || highwaysDisallowingFords[entity2.tags.highway]) {
-                   // do not allow fords on major highways
-                   return null;
-                 }
+         var minZoom = 12;
+         var touchLayer = select(null);
+         var drawLayer = select(null);
+         var layerVisible = false;
 
-                 return bothLines ? {
-                   ford: 'yes'
-                 } : {};
-               }
-             }
-           }
+         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
 
-           return null;
-         }
 
-         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 getService() {
+           if (services.improveOSM && !_qaService$1) {
+             _qaService$1 = services.improveOSM;
 
-           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 = {};
+             _qaService$1.on('loaded', throttledRedraw);
+           } else if (!services.improveOSM && _qaService$1) {
+             _qaService$1 = null;
+           }
 
-           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
+           return _qaService$1;
+         } // Show the markers
 
-             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 editOn() {
+           if (!layerVisible) {
+             layerVisible = true;
+             drawLayer.style('display', 'block');
+           }
+         } // Immediately remove the markers and their touch targets
 
-               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
+         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.
 
-               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);
+         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 (way2FeatureType === null || isLegitCrossing(taggedFeature1.tags, way1FeatureType, taggedFeature2.tags, way2FeatureType)) {
-                 continue;
-               } // create only one issue for building crossings
 
+         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
 
-               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;
-               }
+         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..
 
-               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);
+           var markers = drawLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-               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
-                 });
+           markers.exit().remove(); // enter
 
-                 if (oneOnly) {
-                   checkedSingleCrossingWays[way2.id] = true;
-                   break;
-                 }
-               }
+           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;
+
+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return "#".concat(picon).concat(isMaki ? '-11' : '');
              }
-           }
+           }); // update
 
-           return edgeCrossInfos;
-         }
+           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+             return d.id === selectedID;
+           }).attr('transform', getTransform); // Draw targets..
 
-         function waysToCheck(entity, graph) {
-           var featureType = getFeatureType(entity, graph);
-           if (!featureType) return [];
+           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
 
-           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
+           targets.exit().remove(); // enter/update
 
-                 if (entity && array.indexOf(entity) === -1) {
-                   array.push(entity);
-                 }
-               }
+           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 array;
-             }, []);
+           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.
 
-           return [];
-         }
 
-         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
+         function drawImproveOSM(selection) {
+           var service = getService();
+           var surface = context.surface();
 
-           var wayIndex, crossingIndex, crossings;
+           if (surface && !surface.empty()) {
+             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+           }
 
-           for (wayIndex in ways) {
-             crossings = findCrossingsByWay(ways[wayIndex], graph, tree);
+           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);
 
-             for (crossingIndex in crossings) {
-               issues.push(createIssue(crossings[crossingIndex], graph));
+           if (_layerEnabled$1) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               service.loadIssues(projection);
+               updateMarkers();
+             } else {
+               editOff();
              }
            }
+         } // Toggles the layer on and off
 
-           return issues;
-         };
-
-         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;
-
-             if (type1 === type2) {
-               return utilDisplayLabel(way1Info.way, graph) > utilDisplayLabel(way2Info.way, graph);
-             } else if (type1 === 'waterway') {
-               return true;
-             } else if (type2 === 'waterway') {
-               return false;
-             }
 
-             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;
+         drawImproveOSM.enabled = function (val) {
+           if (!arguments.length) return _layerEnabled$1;
+           _layerEnabled$1 = val;
 
-           if (isCrossingIndoors) {
-             crossingTypeID = 'indoor-indoor';
-           } else if (isCrossingTunnels) {
-             crossingTypeID = 'tunnel-tunnel';
-           } else if (isCrossingBridges) {
-             crossingTypeID = 'bridge-bridge';
-           }
+           if (_layerEnabled$1) {
+             layerOn();
+           } else {
+             layerOff();
 
-           if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
-             crossingTypeID += '_connectable';
+             if (context.selectedErrorID()) {
+               context.enter(modeBrowse(context));
+             }
            }
 
-           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 = [];
+           dispatch.call('change');
+           return this;
+         };
 
-               if (connectionTags) {
-                 fixes.push(makeConnectWaysFix(this.data.connectionTags));
-               }
+         drawImproveOSM.supported = function () {
+           return !!getService();
+         };
 
-               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
+         return drawImproveOSM;
+       }
 
+       var _layerEnabled = false;
 
-                 var skipTunnelFix = otherFeatureType === 'waterway' && selectedFeatureType !== 'waterway';
+       var _qaService;
 
-                 if (allowsTunnel(selectedFeatureType) && !skipTunnelFix) {
-                   fixes.push(makeAddBridgeOrTunnelFix('add_a_tunnel', 'temaki-tunnel', 'tunnel'));
-                 }
-               } // repositioning the features is always an option
+       function svgOsmose(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;
 
-               fixes.push(new validationIssueFix({
-                 icon: 'iD-operation-move',
-                 title: _t.html('issues.fix.reposition_features.title')
-               }));
-               return fixes;
-             }
-           });
+         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 showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.crossing_ways.' + crossingTypeID + '.reference'));
-           }
-         }
 
-         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;
+         function getService() {
+           if (services.osmose && !_qaService) {
+             _qaService = services.osmose;
 
-               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];
-               }
+             _qaService.on('loaded', throttledRedraw);
+           } else if (!services.osmose && _qaService) {
+             _qaService = null;
+           }
 
-               var crossingLoc = this.issue.loc;
-               var projection = context.projection;
+           return _qaService;
+         } // Show the markers
 
-               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
 
-                 var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);
+         function editOn() {
+           if (!layerVisible) {
+             layerVisible = true;
+             drawLayer.style('display', 'block');
+           }
+         } // Immediately remove the markers and their touch targets
 
-                 if (!structLengthMeters) {
-                   // if no explicit width is set, approximate the width based on the tags
-                   structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
-                 }
 
-                 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 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 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
 
-                 structLengthMeters = structLengthMeters / 2 / Math.sin(crossingAngle) * 2; // add padding since the structure must extend past the edges of the crossed feature
+         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.
 
-                 structLengthMeters += 4; // clamp the length to a reasonable range
 
-                 structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);
+         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
 
-                 function geomToProj(geoPoint) {
-                   return [geoLonToMeters(geoPoint[0], geoPoint[1]), geoLatToMeters(geoPoint[1])];
-                 }
 
-                 function projToGeom(projPoint) {
-                   var lat = geoMetersToLat(projPoint[1]);
-                   return [geoMetersToLon(projPoint[0], lat), lat];
-                 }
+         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..
 
-                 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);
+           var markers = drawLayer.selectAll('.qaItem.osmose').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-                 function locSphericalDistanceFromCrossingLoc(angle, distanceMeters) {
-                   var lengthSphericalMeters = distanceMeters * linearToSphericalMetersRatio;
-                   return projToGeom([projectedCrossingLoc[0] + Math.cos(angle) * lengthSphericalMeters, projectedCrossingLoc[1] + Math.sin(angle) * lengthSphericalMeters]);
-                 }
+           markers.exit().remove(); // enter
 
-                 var endpointLocGetter1 = function endpointLocGetter1(lengthMeters) {
-                   return locSphericalDistanceFromCrossingLoc(projectedAngle, lengthMeters);
-                 };
+           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;
 
-                 var endpointLocGetter2 = function endpointLocGetter2(lengthMeters) {
-                   return locSphericalDistanceFromCrossingLoc(projectedAngle + Math.PI, lengthMeters);
-                 }; // avoid creating very short edges from splitting too close to another node
+             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..
 
-                 var minEdgeLengthMeters = 0.55; // decide where to bound the structure along the way, splitting as necessary
+           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
 
-                 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
+           targets.exit().remove(); // enter/update
 
-                   var crossingToEdgeEndDistance = geoSphericalDistance(crossingLoc, endNode.loc);
+           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);
 
-                   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 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.
 
-                     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 (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 drawOsmose(selection) {
+           var service = getService();
+           var surface = context.surface();
 
+           if (surface && !surface.empty()) {
+             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+           }
 
-                   if (!newNode) newNode = endNode;
-                   var splitAction = actionSplit([newNode.id]).limitWays(resultWayIDs); // only split selected or created ways
-                   // do the split
+           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);
 
-                   graph = splitAction(graph);
+           if (_layerEnabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               service.loadIssues(projection);
+               updateMarkers();
+             } else {
+               editOff();
+             }
+           }
+         } // Toggles the layer on and off
 
-                   if (splitAction.getCreatedWayIDs().length) {
-                     resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
-                   }
 
-                   return newNode;
-                 }
+         drawOsmose.enabled = function (val) {
+           if (!arguments.length) return _layerEnabled;
+           _layerEnabled = val;
 
-                 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
+           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 (bridgeOrTunnel === 'bridge') {
-                   tags.bridge = 'yes';
-                   tags.layer = '1';
-                 } else {
-                   var tunnelValue = 'yes';
+             if (context.selectedErrorID()) {
+               context.enter(modeBrowse(context));
+             }
+           }
 
-                   if (getFeatureType(structureWay, graph) === 'waterway') {
-                     // use `tunnel=culvert` for waterways by default
-                     tunnelValue = 'culvert';
-                   }
+           dispatch.call('change');
+           return this;
+         };
 
-                   tags.tunnel = tunnelValue;
-                   tags.layer = '-1';
-                 } // apply the structure tags to the way
+         drawOsmose.supported = function () {
+           return !!getService();
+         };
 
+         return drawOsmose;
+       }
 
-                 graph = actionChangeTags(structureWay.id, tags)(graph);
-                 return graph;
-               };
+       function svgStreetside(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-               context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
-               context.enter(modeSelect(context, resultWayIDs));
-             }
-           });
-         }
+         var minZoom = 14;
+         var minMarkerZoom = 16;
+         var minViewfieldZoom = 18;
+         var layer = select(null);
+         var _viewerYaw = 0;
+         var _selectedSequence = null;
 
-         function makeConnectWaysFix(connectionTags) {
-           var fixTitleID = 'connect_features';
+         var _streetside;
+         /**
+          * init().
+          */
 
-           if (connectionTags.ford) {
-             fixTitleID = 'connect_using_ford';
-           }
 
-           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
+         function init() {
+           if (svgStreetside.initialized) return; // run once
 
-                   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);
-                   }
-                 });
+           svgStreetside.enabled = false;
+           svgStreetside.initialized = true;
+         }
+         /**
+          * getService().
+          */
 
-                 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'));
-             }
-           });
-         }
+         function getService() {
+           if (services.streetside && !_streetside) {
+             _streetside = services.streetside;
 
-         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
+             _streetside.event.on('viewerChanged.svgStreetside', viewerChanged).on('loadedImages.svgStreetside', throttledRedraw);
+           } else if (!services.streetside && _streetside) {
+             _streetside = null;
+           }
 
-               var layer = tags.layer && Number(tags.layer);
+           return _streetside;
+         }
+         /**
+          * showLayer().
+          */
 
-               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'));
-             }
+         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().
+          */
 
-         validation.type = type;
-         return validation;
-       }
-
-       function validationDisconnectedWay() {
-         var type = 'disconnected_way';
 
-         function isTaggedAsHighway(entity) {
-           return osmRoutableHighwayTagValues[entity.tags.highway];
+         function hideLayer() {
+           throttledRedraw.cancel();
+           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
          }
+         /**
+          * editOn().
+          */
 
-         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 makeFixes(context) {
-             var fixes = [];
-             var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);
+         function editOn() {
+           layer.style('display', 'block');
+         }
+         /**
+          * editOff().
+          */
 
-             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);
-               }
 
-               if (!fixes.length) {
-                 fixes.push(new validationIssueFix({
-                   title: _t.html('issues.fix.connect_feature.title')
-                 }));
-               }
+         function editOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         }
+         /**
+          * click() Handles 'bubble' point click event.
+          */
 
-               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]);
 
-                   if (!operation.disabled()) {
-                     operation();
-                   }
-                 }
-               }));
-             } else {
-               fixes.push(new validationIssueFix({
-                 title: _t.html('issues.fix.connect_features.title')
-               }));
-             }
+         function click(d3_event, d) {
+           var service = getService();
+           if (!service) return; // try to preserve the viewer rotation when staying on the same sequence
 
-             return fixes;
+           if (d.sequenceKey !== _selectedSequence) {
+             _viewerYaw = 0; // reset
            }
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.disconnected_way.routable.reference'));
-           }
+           _selectedSequence = d.sequenceKey;
+           service.ensureViewerLoaded(context).then(function () {
+             service.selectImage(context, d.key).yaw(_viewerYaw).showViewer(context);
+           });
+           context.map().centerEase(d.loc);
+         }
+         /**
+          * mouseover().
+          */
 
-           function routingIslandForEntity(entity) {
-             var routingIsland = new Set(); // the interconnected routable features
 
-             var waysToCheck = []; // the queue of remaining routable ways to traverse
+         function mouseover(d3_event, d) {
+           var service = getService();
+           if (service) service.setStyles(context, d);
+         }
+         /**
+          * mouseout().
+          */
 
-             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 (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;
-             }
+         function mouseout() {
+           var service = getService();
+           if (service) service.setStyles(context, null);
+         }
+         /**
+          * transform().
+          */
 
-             while (waysToCheck.length) {
-               var wayToCheck = waysToCheck.pop();
-               var childNodes = graph.childNodes(wayToCheck);
 
-               for (var i in childNodes) {
-                 var vertex = childNodes[i];
+         function transform(d) {
+           var t = svgPointTransform(projection)(d);
+           var rot = d.ca + _viewerYaw;
 
-                 if (isConnectedVertex(vertex)) {
-                   // found a link to the wider network, not a routing island
-                   return null;
-                 }
+           if (rot) {
+             t += ' rotate(' + Math.floor(rot) + ',0,0)';
+           }
 
-                 if (isRoutableNode(vertex)) {
-                   routingIsland.add(vertex);
-                 }
+           return t;
+         }
 
-                 queueParentWays(vertex);
-               }
-             } // no network link found, this is a routing island, return its members
+         function viewerChanged() {
+           var service = getService();
+           if (!service) return;
+           var viewer = service.viewer();
+           if (!viewer) return; // update viewfield rotation
 
+           _viewerYaw = viewer.getYaw(); // avoid updating if the map is currently transformed
+           // e.g. during drags or easing.
 
-             return routingIsland;
-           }
+           if (context.map().isTransformed()) return;
+           layer.selectAll('.viewfield-group.currentView').attr('transform', transform);
+         }
 
-           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 filterBubbles(bubbles) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var usernames = context.photos().usernames();
 
-             if (vertex.tags.entrance && vertex.tags.entrance !== 'no') return true;
-             if (vertex.tags.amenity === 'parking_entrance') return true;
-             return false;
+           if (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             bubbles = bubbles.filter(function (bubble) {
+               return new Date(bubble.captured_at).getTime() >= fromTimestamp;
+             });
            }
 
-           function isRoutableNode(node) {
-             // treat elevators as distinct features in the highway network
-             if (node.tags.highway === 'elevator') return true;
-             return false;
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             bubbles = bubbles.filter(function (bubble) {
+               return new Date(bubble.captured_at).getTime() <= toTimestamp;
+             });
            }
 
-           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;
+           if (usernames) {
+             bubbles = bubbles.filter(function (bubble) {
+               return usernames.indexOf(bubble.captured_by) !== -1;
              });
            }
 
-           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
-
-                 var map = context.map();
+           return bubbles;
+         }
 
-                 if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
-                   map.zoomToEase(vertex);
-                 }
+         function filterSequences(sequences) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var usernames = context.photos().usernames();
 
-                 context.enter(modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true));
-               }
+           if (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             sequences = sequences.filter(function (sequences) {
+               return new Date(sequences.properties.captured_at).getTime() >= fromTimestamp;
              });
            }
-         };
-
-         validation.type = type;
-         return validation;
-       }
-
-       function validationFormatting() {
-         var type = 'invalid_format';
-
-         var validation = function validation(entity) {
-           var issues = [];
 
-           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
-
-             return !email || valid_email.test(email);
-           }
-           /*
-           function isSchemePresent(url) {
-               var valid_scheme = /^https?:\/\//i;
-               return (!url || valid_scheme.test(url));
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             sequences = sequences.filter(function (sequences) {
+               return new Date(sequences.properties.captured_at).getTime() <= toTimestamp;
+             });
            }
-           */
-
 
-           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' : ''
-                   }));
-               }
+           if (usernames) {
+             sequences = sequences.filter(function (sequences) {
+               return usernames.indexOf(sequences.properties.captured_by) !== -1;
+             });
            }
-           */
 
+           return sequences;
+         }
+         /**
+          * update().
+          */
 
-           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);
-             });
 
-             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' : ''
-               }));
-             }
+         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 = [];
+
+           if (context.photos().showsPanoramic()) {
+             sequences = service ? service.sequences(projection) : [];
+             bubbles = service && showMarkers ? service.bubbles(projection) : [];
+             sequences = filterSequences(sequences);
+             bubbles = filterBubbles(bubbles);
            }
 
-           return issues;
-         };
+           var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+             return d.properties.key;
+           }); // exit
 
-         validation.type = type;
-         return validation;
-       }
+           traces.exit().remove(); // enter/update
 
-       function validationHelpRequest(context) {
-         var type = 'help_request';
+           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
 
-         var validation = function checkFixmeTag(entity) {
-           if (!entity.tags.fixme) return []; // don't flag fixmes on features added by the user
+           groups.exit().remove(); // enter
 
-           if (entity.version === undefined) return [];
+           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 (entity.v !== undefined) {
-             var baseEntity = context.history().base().hasEntity(entity.id); // don't flag fixmes added by the user on existing features
+           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
 
-             if (!baseEntity || !baseEntity.tags.fixme) return [];
-           }
+           viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
 
-           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 viewfieldPath() {
+             var d = this.parentNode.__data__;
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.fixme_tag.reference'));
+             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';
+             }
            }
-         };
-
-         validation.type = type;
-         return validation;
-       }
+         }
+         /**
+          * drawImages()
+          * drawImages is the method that is returned (and that runs) every time 'svgStreetside()' is called.
+          * 'svgStreetside()' is called from index.js
+          */
 
-       function validationImpossibleOneway() {
-         var type = 'impossible_oneway';
 
-         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 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);
 
-           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 (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadBubbles(projection);
+             } else {
+               editOff();
+             }
            }
+         }
+         /**
+          * drawImages.enabled().
+          */
 
-           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;
-               }
-             }
+         drawImages.enabled = function (_) {
+           if (!arguments.length) return svgStreetside.enabled;
+           svgStreetside.enabled = _;
 
-             return false;
+           if (svgStreetside.enabled) {
+             showLayer();
+             context.photos().on('change.streetside', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.streetside', null);
            }
 
-           function nodeOccursMoreThanOnce(way, nodeID) {
-             var occurrences = 0;
+           dispatch.call('change');
+           return this;
+         };
+         /**
+          * drawImages.supported().
+          */
+
 
-             for (var index in way.nodes) {
-               if (way.nodes[index] === nodeID) {
-                 occurrences += 1;
-                 if (occurrences > 1) return true;
-               }
-             }
+         drawImages.supported = function () {
+           return !!getService();
+         };
 
-             return false;
-           }
+         init();
+         return drawImages;
+       }
 
-           function isConnectedViaOtherTypes(way, node) {
-             var wayType = typeForWay(way);
+       function svgMapillaryImages(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-             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 minZoom = 12;
+         var minMarkerZoom = 16;
+         var minViewfieldZoom = 18;
+         var layer = select(null);
 
-             return graph.parentWays(node).some(function (parentWay) {
-               if (parentWay.id === way.id) return false;
+         var _mapillary;
 
-               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
+         function init() {
+           if (svgMapillaryImages.initialized) return; // run once
 
-                 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
+           svgMapillaryImages.enabled = false;
+           svgMapillaryImages.initialized = 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;
-               }
+         function getService() {
+           if (services.mapillary && !_mapillary) {
+             _mapillary = services.mapillary;
 
-               return false;
-             });
+             _mapillary.event.on('loadedImages', throttledRedraw);
+           } else if (!services.mapillary && _mapillary) {
+             _mapillary = null;
            }
 
-           function issuesForNode(way, nodeID) {
-             var isFirst = nodeID === way.first();
-             var wayType = typeForWay(way); // ignore if this way is self-connected at this node
+           return _mapillary;
+         }
 
-             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
+         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');
+           });
+         }
 
-             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
+         function hideLayer() {
+           throttledRedraw.cancel();
+           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+         }
 
-             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 editOn() {
+           layer.style('display', 'block');
+         }
 
-             if (attachedOneways.length < attachedWaysOfSameType.length) return [];
+         function editOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         }
 
-             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 [];
-             }
+         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);
+         }
 
-             var placement = isFirst ? 'start' : 'end',
-                 messageID = wayType + '.',
-                 referenceID = wayType + '.';
+         function mouseover(d3_event, image) {
+           var service = getService();
+           if (service) service.setStyles(context, image);
+         }
 
-             if (wayType === 'waterway') {
-               messageID += 'connected.' + placement;
-               referenceID += 'connected';
-             } else {
-               messageID += placement;
-               referenceID += placement;
-             }
+         function mouseout() {
+           var service = getService();
+           if (service) service.setStyles(context, 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 = [];
+         function transform(d) {
+           var t = svgPointTransform(projection)(d);
 
-                 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
-                       }));
-                     }
-                   }));
-                 }
+           if (d.ca) {
+             t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
+           }
 
-                 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);
-                     }
-                   }));
-                 }
+           return t;
+         }
 
-                 return fixes;
-               },
-               loc: node.loc
-             })];
+         function filterImages(images) {
+           var showsPano = context.photos().showsPanoramic();
+           var showsFlat = context.photos().showsFlat();
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
 
-             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'));
-               };
-             }
+           if (!showsPano || !showsFlat) {
+             images = images.filter(function (image) {
+               if (image.is_pano) return showsPano;
+               return showsFlat;
+             });
            }
-         };
 
-         function continueDrawing(way, vertex, context) {
-           // make sure the vertex is actually visible and editable
-           var map = context.map();
+           if (fromDate) {
+             images = images.filter(function (image) {
+               return new Date(image.captured_at).getTime() >= new Date(fromDate).getTime();
+             });
+           }
 
-           if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
-             map.zoomToEase(vertex);
+           if (toDate) {
+             images = images.filter(function (image) {
+               return new Date(image.captured_at).getTime() <= new Date(toDate).getTime();
+             });
            }
 
-           context.enter(modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true));
+           return images;
          }
 
-         validation.type = type;
-         return validation;
-       }
+         function filterSequences(sequences) {
+           var showsPano = context.photos().showsPanoramic();
+           var showsFlat = context.photos().showsFlat();
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
 
-       function validationIncompatibleSource() {
-         var type = 'incompatible_source';
-         var invalidSources = [{
-           id: 'google',
-           regex: 'google',
-           exceptRegex: 'books.google|Google Books|drive.google|googledrive|Google Drive'
-         }];
+           if (!showsPano || !showsFlat) {
+             sequences = sequences.filter(function (sequence) {
+               if (sequence.properties.hasOwnProperty('is_pano')) {
+                 if (sequence.properties.is_pano) return showsPano;
+                 return showsFlat;
+               }
 
-         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;
+               return false;
              });
-             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')
-                 })];
-               }
-             }));
-           });
-           return issues;
+           }
 
-           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'));
-             };
+           if (fromDate) {
+             sequences = sequences.filter(function (sequence) {
+               return new Date(sequence.properties.captured_at).getTime() >= new Date(fromDate).getTime().toString();
+             });
            }
-         };
 
-         validation.type = type;
-         return validation;
-       }
+           if (toDate) {
+             sequences = sequences.filter(function (sequence) {
+               return new Date(sequence.properties.captured_at).getTime() <= new Date(toDate).getTime().toString();
+             });
+           }
 
-       function validationMaprules() {
-         var type = 'maprules';
+           return sequences;
+         }
 
-         var validation = function checkMaprules(entity, graph) {
-           if (!services.maprules) return [];
-           var rules = services.maprules.validationRules();
-           var issues = [];
+         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
 
-           for (var i = 0; i < rules.length; i++) {
-             var rule = rules[i];
-             rule.findIssues(entity, graph, issues);
-           }
+           traces.exit().remove(); // enter/update
 
-           return issues;
-         };
+           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
 
-         validation.type = type;
-         return validation;
-       }
+           groups.exit().remove(); // enter
 
-       function validationMismatchedGeometry() {
-         var type = 'mismatched_geometry';
+           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
 
-         function tagSuggestingLineIsArea(entity) {
-           if (entity.type !== 'way' || entity.isClosed()) return null;
-           var tagSuggestingArea = entity.tagSuggestingArea();
+           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);
 
-           if (!tagSuggestingArea) {
-             return null;
+           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';
+             }
            }
+         }
 
-           var asLine = _mainPresetIndex.matchTags(tagSuggestingArea, 'line');
-           var asArea = _mainPresetIndex.matchTags(tagSuggestingArea, 'area');
+         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);
 
-           if (asLine && asArea && asLine === asArea) {
-             // these tags also allow lines and making this an area wouldn't matter
-             return null;
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadImages(projection);
+             } else {
+               editOff();
+             }
            }
-
-           return tagSuggestingArea;
          }
 
-         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 (firstToLastDistanceMeters < 0.75) {
-             testNodes = nodes.slice(); // shallow copy
+         drawImages.enabled = function (_) {
+           if (!arguments.length) return svgMapillaryImages.enabled;
+           svgMapillaryImages.enabled = _;
 
-             testNodes.pop();
-             testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
+           if (svgMapillaryImages.enabled) {
+             showLayer();
+             context.photos().on('change.mapillary_images', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.mapillary_images', null);
+           }
 
-             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
+           dispatch.call('change');
+           return this;
+         };
 
+         drawImages.supported = function () {
+           return !!getService();
+         };
 
-           testNodes = nodes.slice(); // shallow copy
+         init();
+         return drawImages;
+       }
 
-           testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
+       function svgMapillaryPosition(projection, context) {
+         var throttledRedraw = throttle(function () {
+           update();
+         }, 1000);
 
-           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 minZoom = 12;
+         var minViewfieldZoom = 18;
+         var layer = select(null);
 
-         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
+         var _mapillary;
 
-                   for (var key in tagSuggestingArea) {
-                     delete tags[key];
-                   }
+         var viewerCompassAngle;
 
-                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_tag.annotation'));
-                 }
-               }));
-               return fixes;
-             }
-           });
+         function init() {
+           if (svgMapillaryPosition.initialized) return; // run once
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.tag_suggests_area.reference'));
-           }
+           svgMapillaryPosition.initialized = true;
          }
 
-         function vertexTaggedAsPointIssue(entity, graph) {
-           // we only care about nodes
-           if (entity.type !== 'node') return null; // ignore tagless points
-
-           if (Object.keys(entity.tags).length === 0) return null; // address lines are special so just ignore them
+         function getService() {
+           if (services.mapillary && !_mapillary) {
+             _mapillary = services.mapillary;
 
-           if (entity.isOnAddressLine(graph)) return null;
-           var geometry = entity.geometry(graph);
-           var allowedGeometries = osmNodeGeometriesForTags(entity.tags);
+             _mapillary.event.on('imageChanged', throttledRedraw);
 
-           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]
+             _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 (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()]));
-                   };
-                 }
+           } else if (!services.mapillary && _mapillary) {
+             _mapillary = null;
+           }
+
+           return _mapillary;
+         }
+
+         function editOn() {
+           layer.style('display', 'block');
+         }
+
+         function editOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         }
 
-                 return [new validationIssueFix({
-                   icon: 'iD-operation-extract',
-                   title: _t.html('issues.fix.extract_point.title'),
-                   onClick: extractOnClick
-                 })];
-               }
-             });
+         function transform(d) {
+           var t = svgPointTransform(projection)(d);
+
+           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)';
            }
 
-           return null;
+           return t;
          }
 
-         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 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
 
-           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
+           groups.exit().remove(); // enter
 
-             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);
-           }
+           var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group currentView highlighted');
+           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
-           return issues;
+           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');
+         }
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unclosed_multipolygon_part.reference'));
+         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);
+
+           if (service && ~~context.map().zoom() >= minZoom) {
+             editOn();
+             update();
+           } else {
+             editOff();
            }
          }
 
-         var validation = function checkMismatchedGeometry(entity, graph) {
-           var issues = [vertexTaggedAsPointIssue(entity, graph), lineTaggedAsAreaIssue(entity)];
-           issues = issues.concat(unclosedMultipolygonPartIssues(entity, graph));
-           return issues.filter(Boolean);
+         drawImages.enabled = function () {
+           update();
+           return this;
          };
 
-         validation.type = type;
-         return validation;
+         drawImages.supported = function () {
+           return !!getService();
+         };
+
+         init();
+         return drawImages;
        }
 
-       function validationMissingRole() {
-         var type = 'missing_role';
+       function svgMapillarySigns(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-         var validation = function checkMissingRole(entity, graph) {
-           var issues = [];
+         var minZoom = 12;
+         var layer = select(null);
 
-           if (entity.type === 'way') {
-             graph.parentRelations(entity).forEach(function (relation) {
-               if (!relation.isMultipolygon()) return;
-               var member = relation.memberById(entity.id);
+         var _mapillary;
 
-               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);
+         function init() {
+           if (svgMapillarySigns.initialized) return; // run once
 
-               if (way && isMissingRole(member)) {
-                 issues.push(makeIssue(way, entity, member));
-               }
-             });
-           }
+           svgMapillarySigns.enabled = false;
+           svgMapillarySigns.initialized = true;
+         }
 
-           return issues;
-         };
+         function getService() {
+           if (services.mapillary && !_mapillary) {
+             _mapillary = services.mapillary;
 
-         function isMissingRole(member) {
-           return !member.role || !member.role.trim().length;
+             _mapillary.event.on('loadedSigns', throttledRedraw);
+           } else if (!services.mapillary && _mapillary) {
+             _mapillary = null;
+           }
+
+           return _mapillary;
          }
 
-         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 showLayer() {
+           var service = getService();
+           if (!service) return;
+           service.loadSignResources(context);
+           editOn();
+         }
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.missing_role.multipolygon.reference'));
-           }
+         function hideLayer() {
+           throttledRedraw.cancel();
+           editOff();
          }
 
-         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
-               }));
-             }
-           });
+         function editOn() {
+           layer.style('display', 'block');
          }
 
-         validation.type = type;
-         return validation;
-       }
+         function editOff() {
+           layer.selectAll('.icon-sign').remove();
+           layer.style('display', 'none');
+         }
 
-       function validationMissingTag(context) {
-         var type = 'missing_tag';
+         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;
 
-         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 (imageId === selectedImageId) {
+                 service.highlightDetection(detections[0]).selectImage(context, imageId);
+               } else {
+                 service.ensureViewerLoaded(context).then(function () {
+                   service.highlightDetection(detections[0]).selectImage(context, imageId).showViewer(context);
+                 });
+               }
              }
            });
+         }
 
-           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 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;
+             });
            }
 
-           return keys.length > 0;
-         }
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             detectedFeatures = detectedFeatures.filter(function (feature) {
+               return new Date(feature.first_seen_at).getTime() <= toTimestamp;
+             });
+           }
 
-         function isUnknownRoad(entity) {
-           return entity.type === 'way' && entity.tags.highway === 'road';
+           return detectedFeatures;
          }
 
-         function isUntypedRelation(entity) {
-           return entity.type === 'relation' && !entity.tags.type;
+         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
+
+           signs.exit().remove(); // enter
+
+           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);
          }
 
-         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
+         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 (!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';
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadSigns(projection);
+               service.showSignDetections(true);
+             } else {
+               editOff();
              }
-           } // flag an unknown road even if it's a member of a relation
+           } else if (service) {
+             service.showSignDetections(false);
+           }
+         }
 
+         drawSigns.enabled = function (_) {
+           if (!arguments.length) return svgMapillarySigns.enabled;
+           svgMapillarySigns.enabled = _;
 
-           if (!subtype && isUnknownRoad(entity)) {
-             subtype = 'highway_classification';
+           if (svgMapillarySigns.enabled) {
+             showLayer();
+             context.photos().on('change.mapillary_signs', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.mapillary_signs', null);
            }
 
-           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..
+           dispatch.call('change');
+           return this;
+         };
 
-           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();
+         drawSigns.supported = function () {
+           return !!getService();
+         };
 
-               if (!disabledReasonID) {
-                 deleteOnClick = function deleteOnClick(context) {
-                   var id = this.issue.entityIds[0];
-                   var operation = operationDelete(context, [id]);
+         init();
+         return drawSigns;
+       }
 
-                   if (!operation.disabled()) {
-                     operation();
-                   }
-                 };
-               }
+       function svgMapillaryMapFeatures(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-               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;
-             }
-           })];
+         var minZoom = 12;
+         var layer = select(null);
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.' + referenceID + '.reference'));
-           }
-         };
+         var _mapillary;
 
-         validation.type = type;
-         return validation;
-       }
+         function init() {
+           if (svgMapillaryMapFeatures.initialized) return; // run once
 
-       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());
-       };
+           svgMapillaryMapFeatures.enabled = false;
+           svgMapillaryMapFeatures.initialized = true;
+         }
 
-       // {
-       //   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 getService() {
+           if (services.mapillary && !_mapillary) {
+             _mapillary = services.mapillary;
 
-       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;
-       };
+             _mapillary.event.on('loadedMapFeatures', throttledRedraw);
+           } else if (!services.mapillary && _mapillary) {
+             _mapillary = null;
+           }
 
-       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
-       };
+           return _mapillary;
+         }
 
-       var matchGroups$1 = require$$0.matchGroups;
+         function showLayer() {
+           var service = getService();
+           if (!service) return;
+           service.loadObjectResources(context);
+           editOn();
+         }
 
-       var matcher$1 = function matcher() {
-         var _warnings = []; // array of match conflict pairs
+         function hideLayer() {
+           throttledRedraw.cancel();
+           editOff();
+         }
 
-         var _ambiguous = {};
-         var _matchIndex = {};
-         var matcher = {}; // Create an index of all the keys/simplenames for fast matching
+         function editOn() {
+           layer.style('display', 'block');
+         }
 
-         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 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 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) {
+             detectedFeatures = detectedFeatures.filter(function (feature) {
+               return new Date(feature.last_seen_at).getTime() >= new Date(fromDate).getTime();
+             });
+           }
 
-           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.
+           if (toDate) {
+             detectedFeatures = detectedFeatures.filter(function (feature) {
+               return new Date(feature.first_seen_at).getTime() <= new Date(toDate).getTime();
+             });
+           }
 
-             if (which === 'secondary' && parts.d) return;
+           return detectedFeatures;
+         }
 
-             if (obj.countryCodes) {
-               parts.countryCodes = obj.countryCodes.slice(); // copy
-             }
+         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
 
-             var nomatches = obj.nomatch || [];
+           mapFeatures.exit().remove(); // enter
 
-             if (nomatches.some(function (s) {
-               return s === kvnd;
-             })) {
-               console.log("WARNING match/nomatch conflict for ".concat(kvnd));
-               return;
+           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';
              }
 
-             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 = [];
+             return '#' + d.value;
+           });
+           enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update
+
+           mapFeatures.merge(enter).attr('transform', transform);
+         }
 
-             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);
+         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);
+
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadMapFeatures(projection);
+               service.showFeatureDetections(true);
+             } else {
+               editOff();
              }
+           } else if (service) {
+             service.showFeatureDetections(false);
+           }
+         }
 
-             if (!match_nsimple.length) return; // nothing to do
+         drawMapFeatures.enabled = function (_) {
+           if (!arguments.length) return svgMapillaryMapFeatures.enabled;
+           svgMapillaryMapFeatures.enabled = _;
 
-             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
-                   }
-                 }
-               });
-             });
+           if (svgMapillaryMapFeatures.enabled) {
+             showLayer();
+             context.photos().on('change.mapillary_map_features', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.mapillary_map_features', null);
            }
-         }; // pass a `key`, `value`, `name` and return the best match,
-         // `countryCode` optional (if supplied, must match that too)
 
+           dispatch.call('change');
+           return this;
+         };
+
+         drawMapFeatures.supported = function () {
+           return !!getService();
+         };
+
+         init();
+         return drawMapFeatures;
+       }
+
+       function svgKartaviewImages(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
+
+         var minZoom = 12;
+         var minMarkerZoom = 16;
+         var minViewfieldZoom = 18;
+         var layer = select(null);
+
+         var _kartaview;
 
-         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)
+         function init() {
+           if (svgKartaviewImages.initialized) return; // run once
 
+           svgKartaviewImages.enabled = false;
+           svgKartaviewImages.initialized = true;
+         }
 
-         matcher.matchParts = function (parts, countryCode) {
-           var match = null;
-           var inGroup = false; // fixme: we currently return a single match for ambiguous
+         function getService() {
+           if (services.kartaview && !_kartaview) {
+             _kartaview = services.kartaview;
 
-           match = _ambiguous[parts.kv] && _ambiguous[parts.kv][parts.nsimple];
-           if (match && matchesCountryCode(match)) return match; // try to return an exact match
+             _kartaview.event.on('loadedImages', throttledRedraw);
+           } else if (!services.kartaview && _kartaview) {
+             _kartaview = null;
+           }
 
-           match = _matchIndex[parts.kv] && _matchIndex[parts.kv][parts.nsimple];
-           if (match && matchesCountryCode(match)) return match; // look in match groups
+           return _kartaview;
+         }
 
-           for (var mg in matchGroups$1) {
-             var matchGroup = matchGroups$1[mg];
-             match = null;
-             inGroup = false;
+         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');
+           });
+         }
 
-             for (var i = 0; i < matchGroup.length; i++) {
-               var otherkv = matchGroup[i].toLowerCase();
+         function hideLayer() {
+           throttledRedraw.cancel();
+           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+         }
 
-               if (!inGroup) {
-                 inGroup = otherkv === parts.kv;
-               }
+         function editOn() {
+           layer.style('display', 'block');
+         }
 
-               if (!match) {
-                 // fixme: we currently return a single match for ambiguous
-                 match = _ambiguous[otherkv] && _ambiguous[otherkv][parts.nsimple];
-               }
+         function editOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         }
 
-               if (!match) {
-                 match = _matchIndex[otherkv] && _matchIndex[otherkv][parts.nsimple];
-               }
+         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);
+         }
 
-               if (match && !matchesCountryCode(match)) {
-                 match = null;
-               }
+         function mouseover(d3_event, d) {
+           var service = getService();
+           if (service) service.setStyles(context, d);
+         }
 
-               if (inGroup && match) {
-                 return match;
-               }
-             }
-           }
+         function mouseout() {
+           var service = getService();
+           if (service) service.setStyles(context, null);
+         }
 
-           return null;
+         function transform(d) {
+           var t = svgPointTransform(projection)(d);
 
-           function matchesCountryCode(match) {
-             if (!countryCode) return true;
-             if (!match.countryCodes) return true;
-             return match.countryCodes.indexOf(countryCode) !== -1;
+           if (d.ca) {
+             t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
            }
-         };
-
-         matcher.getWarnings = function () {
-           return _warnings;
-         };
 
-         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.es/ecma262/#sec-string.fromcodepoint
-       _export({ 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(code + ' is not a valid code point');
-             elements.push(code < 0x10000
-               ? fromCharCode(code)
-               : fromCharCode(((code -= 0x10000) >> 10) + 0xD800, code % 0x400 + 0xDC00)
-             );
-           } return elements.join('');
+           return t;
          }
-       });
 
-       var quickselect$2 = createCommonjsModule(function (module, exports) {
-         (function (global, factory) {
-            module.exports = factory() ;
-         })(commonjsGlobal, function () {
+         function filterImages(images) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var usernames = context.photos().usernames();
 
-           function quickselect(arr, k, left, right, compare) {
-             quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
+           if (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             images = images.filter(function (item) {
+               return new Date(item.captured_at).getTime() >= fromTimestamp;
+             });
            }
 
-           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);
-               }
-
-               var t = arr[k];
-               var i = left;
-               var j = right;
-               swap(arr, left, k);
-               if (compare(arr[right], t) > 0) swap(arr, left, right);
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             images = images.filter(function (item) {
+               return new Date(item.captured_at).getTime() <= toTimestamp;
+             });
+           }
 
-               while (i < j) {
-                 swap(arr, i, j);
-                 i++;
-                 j--;
+           if (usernames) {
+             images = images.filter(function (item) {
+               return usernames.indexOf(item.captured_by) !== -1;
+             });
+           }
 
-                 while (compare(arr[i], t) < 0) {
-                   i++;
-                 }
+           return images;
+         }
 
-                 while (compare(arr[j], t) > 0) {
-                   j--;
-                 }
-               }
+         function filterSequences(sequences) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var usernames = context.photos().usernames();
 
-               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 (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             sequences = sequences.filter(function (image) {
+               return new Date(image.properties.captured_at).getTime() >= fromTimestamp;
+             });
            }
 
-           function swap(arr, i, j) {
-             var tmp = arr[i];
-             arr[i] = arr[j];
-             arr[j] = tmp;
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             sequences = sequences.filter(function (image) {
+               return new Date(image.properties.captured_at).getTime() <= toTimestamp;
+             });
            }
 
-           function defaultCompare(a, b) {
-             return a < b ? -1 : a > b ? 1 : 0;
+           if (usernames) {
+             sequences = sequences.filter(function (image) {
+               return usernames.indexOf(image.properties.captured_by) !== -1;
+             });
            }
 
-           return quickselect;
-         });
-       });
-
-       var rbush_1 = rbush;
-       var _default$1 = rbush;
-
-       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
-
-         this._maxEntries = Math.max(4, maxEntries || 9);
-         this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
-
-         if (format) {
-           this._initFormat(format);
+           return sequences;
          }
 
-         this.clear();
-       }
-
-       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;
-
-           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);
-               }
-             }
+         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 = [];
 
-             node = nodesToSearch.pop();
+           if (context.photos().showsFlat()) {
+             sequences = service ? service.sequences(projection) : [];
+             images = service && showMarkers ? service.images(projection) : [];
+             sequences = filterSequences(sequences);
+             images = filterImages(images);
            }
 
-           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;
+           var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+             return d.properties.key;
+           }); // exit
 
-           while (node) {
-             for (i = 0, len = node.children.length; i < len; i++) {
-               child = node.children[i];
-               childBBox = node.leaf ? toBBox(child) : child;
+           traces.exit().remove(); // enter/update
 
-               if (intersects$1(bbox, childBBox)) {
-                 if (node.leaf || contains$1(bbox, childBBox)) return true;
-                 nodesToSearch.push(child);
-               }
-             }
+           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
 
-             node = nodesToSearch.pop();
-           }
+           groups.exit().remove(); // enter
 
-           return false;
-         },
-         load: function load(data) {
-           if (!(data && data.length)) return this;
+           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 (data.length < this._minEntries) {
-             for (var i = 0, len = data.length; i < len; i++) {
-               this.insert(data[i]);
-             }
+           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');
+         }
 
-             return this;
-           } // recursively build the tree with the given data from scratch using OMT algorithm
+         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);
 
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadImages(projection);
+             } else {
+               editOff();
+             }
+           }
+         }
 
-           var node = this._build(data.slice(), 0, data.length - 1, 0);
+         drawImages.enabled = function (_) {
+           if (!arguments.length) return svgKartaviewImages.enabled;
+           svgKartaviewImages.enabled = _;
 
-           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);
+           if (svgKartaviewImages.enabled) {
+             showLayer();
+             context.photos().on('change.kartaview_images', update);
            } 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._insert(node, this.data.height - node.height - 1, true);
+             hideLayer();
+             context.photos().on('change.kartaview_images', null);
            }
 
+           dispatch.call('change');
            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
+         };
 
-           while (node || path.length) {
-             if (!node) {
-               // go up
-               node = path.pop();
-               parent = path[path.length - 1];
-               i = indexes.pop();
-               goingUp = true;
-             }
+         drawImages.supported = function () {
+           return !!getService();
+         };
 
-             if (node.leaf) {
-               // check current node
-               index = findItem$1(item, node.children, equalsFn);
+         init();
+         return drawImages;
+       }
 
-               if (index !== -1) {
-                 // item found, remove the item and condense tree upwards
-                 node.children.splice(index, 1);
-                 path.push(node);
+       function svgOsm(projection, context, dispatch) {
+         var enabled = true;
 
-                 this._condense(path);
+         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;
+           });
+         }
 
-                 return this;
-               }
-             }
+         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 (!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 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');
+           });
+         }
+
+         drawOsm.enabled = function (val) {
+           if (!arguments.length) return enabled;
+           enabled = val;
 
+           if (enabled) {
+             showLayer();
+           } else {
+             hideLayer();
            }
 
+           dispatch.call('change');
            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 = [];
+         };
 
-           while (node) {
-             if (node.leaf) result.push.apply(result, node.children);else nodesToSearch.push.apply(nodesToSearch, node.children);
-             node = nodesToSearch.pop();
-           }
+         return drawOsm;
+       }
 
-           return result;
-         },
-         _build: function _build(items, left, right, height) {
-           var N = right - left + 1,
-               M = this._maxEntries,
-               node;
+       var _notesEnabled = false;
 
-           if (N <= M) {
-             // reached leaf level; return leaf
-             node = createNode$1(items.slice(left, right + 1));
-             calcBBox$1(node, this.toBBox);
-             return node;
-           }
+       var _osmService;
 
-           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
+       function svgNotes(projection, context, dispatch) {
+         if (!dispatch) {
+           dispatch = dispatch$8('change');
+         }
 
-             M = Math.ceil(N / Math.pow(M, height - 1));
-           }
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-           node = createNode$1([]);
-           node.leaf = false;
-           node.height = height; // split the items into M mostly square tiles
+         var minZoom = 12;
+         var touchLayer = select(null);
+         var drawLayer = select(null);
+         var _notesVisible = false;
 
-           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);
+         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.
 
-           for (i = left; i <= right; i += N1) {
-             right2 = Math.min(i + N1 - 1, right);
-             multiSelect$1(items, i, right2, N2, this.compareMinY);
 
-             for (j = i; j <= right2; j += N2) {
-               right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
+         function getService() {
+           if (services.osm && !_osmService) {
+             _osmService = services.osm;
 
-               node.children.push(this._build(items, j, right3, height - 1));
-             }
+             _osmService.on('loadedNotes', throttledRedraw);
+           } else if (!services.osm && _osmService) {
+             _osmService = null;
            }
 
-           calcBBox$1(node, this.toBBox);
-           return node;
-         },
-         _chooseSubtree: function _chooseSubtree(bbox, node, level, path) {
-           var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;
+           return _osmService;
+         } // Show the notes
 
-           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 editOn() {
+           if (!_notesVisible) {
+             _notesVisible = true;
+             drawLayer.style('display', 'block');
+           }
+         } // Immediately remove the notes and their touch targets
 
-               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;
-                 }
-               }
-             }
 
-             node = targetNode || node.children[0];
+         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 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
+         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 node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
 
+         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
 
-           node.children.push(item);
-           extend$3(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 updateMarkers() {
+           if (!_notesVisible || !_notesEnabled) return;
+           var service = getService();
+           var selectedID = context.selectedNoteID();
+           var data = service ? service.notes(projection) : [];
+           var getTransform = svgPointTransform(projection); // Draw markers..
 
-               level--;
-             } else break;
-           } // adjust bboxes along the insertion path
+           var notes = drawLayer.selectAll('.note').data(data, function (d) {
+             return d.status + d.id;
+           }); // exit
 
+           notes.exit().remove(); // enter
 
-           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;
+           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
 
-           this._chooseSplitAxis(node, m, M);
+           notes.merge(notesEnter).sort(sortY).classed('selected', function (d) {
+             var mode = context.mode();
+             var isMoving = mode && mode.id === 'drag-note'; // no shadows when dragging
 
-           var splitIndex = this._chooseSplitIndex(node, m, M);
+             return !isMoving && d.id === selectedID;
+           }).attr('transform', getTransform); // Draw targets..
 
-           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;
+           if (touchLayer.empty()) return;
+           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var targets = touchLayer.selectAll('.note').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-           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.exit().remove(); // enter/update
 
-             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;
-               }
-             }
-           }
+           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);
 
-           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 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.
 
 
-           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;
+         function drawNotes(selection) {
+           var service = getService();
+           var surface = context.surface();
 
-           for (i = m; i < M - m; i++) {
-             child = node.children[i];
-             extend$3(leftBBox, node.leaf ? toBBox(child) : child);
-             margin += bboxMargin$1(leftBBox);
+           if (surface && !surface.empty()) {
+             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
            }
 
-           for (i = M - m - 1; i >= m; i--) {
-             child = node.children[i];
-             extend$3(rightBBox, node.leaf ? toBBox(child) : child);
-             margin += bboxMargin$1(rightBBox);
-           }
+           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);
 
-           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);
+           if (_notesEnabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               service.loadNotes(projection);
+               updateMarkers();
+             } else {
+               editOff();
+             }
            }
-         },
-         _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] + '};');
-         }
-       };
-
-       function findItem$1(item, items, equalsFn) {
-         if (!equalsFn) return items.indexOf(item);
+         } // Toggles the layer on and off
 
-         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
+         drawNotes.enabled = function (val) {
+           if (!arguments.length) return _notesEnabled;
+           _notesEnabled = val;
 
+           if (_notesEnabled) {
+             layerOn();
+           } else {
+             layerOff();
 
-       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
+             if (context.selectedNoteID()) {
+               context.enter(modeBrowse(context));
+             }
+           }
 
+           dispatch.call('change');
+           return this;
+         };
 
-       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 drawNotes;
+       }
 
-         for (var i = k, child; i < p; i++) {
-           child = node.children[i];
-           extend$3(destNode, node.leaf ? toBBox(child) : child);
+       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;
+           });
          }
 
-         return destNode;
+         return drawTouch;
        }
 
-       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 refresh(selection, node) {
+         var cr = node.getBoundingClientRect();
+         var prop = [cr.width, cr.height];
+         selection.property('__dimensions__', prop);
+         return prop;
        }
 
-       function compareNodeMinX$1(a, b) {
-         return a.minX - b.minX;
-       }
+       function utilGetDimensions(selection, force) {
+         if (!selection || selection.empty()) {
+           return [0, 0];
+         }
 
-       function compareNodeMinY$1(a, b) {
-         return a.minY - b.minY;
+         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;
+         }
 
-       function bboxArea$1(a) {
-         return (a.maxX - a.minX) * (a.maxY - a.minY);
-       }
+         var node = selection.node();
 
-       function bboxMargin$1(a) {
-         return a.maxX - a.minX + (a.maxY - a.minY);
-       }
+         if (dimensions === null) {
+           refresh(selection, node);
+           return selection;
+         }
 
-       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));
+         return selection.property('__dimensions__', [dimensions[0], dimensions[1]]).attr('width', dimensions[0]).attr('height', dimensions[1]);
        }
 
-       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);
-       }
+       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()
+         }];
 
-       function contains$1(a, b) {
-         return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
-       }
+         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);
+           });
+         }
 
-       function intersects$1(a, b) {
-         return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
-       }
+         drawLayers.all = function () {
+           return _layers;
+         };
 
-       function createNode$1(children) {
-         return {
-           children: children,
-           height: 1,
-           leaf: true,
-           minX: Infinity,
-           minY: Infinity,
-           maxX: -Infinity,
-           maxY: -Infinity
+         drawLayers.layer = function (id) {
+           var obj = _layers.find(function (o) {
+             return o.id === id;
+           });
+
+           return obj && obj.layer;
          };
-       } // 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
 
+         drawLayers.only = function (what) {
+           var arr = [].concat(what);
 
-       function multiSelect$1(arr, left, right, n, compare) {
-         var stack = [left, right],
-             mid;
+           var all = _layers.map(function (layer) {
+             return layer.id;
+           });
 
-         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$1;
+           return drawLayers.remove(utilArrayDifference(all, arr));
+         };
 
-       var lineclip_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
+         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;
+         };
 
-       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 = [];
+         drawLayers.add = function (what) {
+           var arr = [].concat(what);
+           arr.forEach(function (obj) {
+             if ('id' in obj && 'layer' in obj) {
+               _layers.push(obj);
+             }
+           });
+           dispatch.call('change');
+           return this;
+         };
 
-         for (i = 1; i < len; i++) {
-           a = points[i - 1];
-           b = points[i];
-           codeB = lastCode = bitCode$1(b, bbox);
+         drawLayers.dimensions = function (val) {
+           if (!arguments.length) return utilGetDimensions(svg);
+           utilSetDimensions(svg, val);
+           return this;
+         };
 
-           while (true) {
-             if (!(codeA | codeB)) {
-               // accept
-               part.push(a);
+         return utilRebind(drawLayers, dispatch, 'on');
+       }
 
-               if (codeB !== lastCode) {
-                 // segment went outside
-                 part.push(b);
+       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
+         };
 
-                 if (i < len - 1) {
-                   // start a new line
-                   result.push(part);
-                   part = [];
-                 }
-               } else if (i === len - 1) {
-                 part.push(b);
-               }
+         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
 
-               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);
-             }
-           }
+           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
 
-           codeA = lastCode;
-         }
+           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
 
-         if (part.length) result.push(part);
-         return result;
-       } // Sutherland-Hodgeman polygon clipping algorithm
+           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 (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
+               return false;
+             }
 
-       function polygonclip$1(points, bbox) {
-         var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
+             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
 
-         for (edge = 1; edge <= 8; edge *= 2) {
-           result = [];
-           prev = points[points.length - 1];
-           prevInside = !(bitCode$1(prev, bbox) & edge);
 
-           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
+           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
 
-             if (inside !== prevInside) result.push(intersect$1(prev, p, edge, bbox));
-             if (inside) result.push(p); // add a point if it's inside
+           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
 
-             prev = p;
-             prevInside = inside;
-           }
+           nopes.exit().remove(); // enter/update
 
-           points = result;
-           if (!points.length) break;
+           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);
          }
 
-         return result;
-       } // intersect a segment against one of the 4 lines that make up the bbox
-
+         function drawLines(selection, graph, entities, filter) {
+           var base = context.history().base();
 
-       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
+           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];
+             }
 
-       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
+             if (b.tags.highway) {
+               scoreB -= highway_stack[b.tags.highway];
+             }
 
-         if (p[1] < bbox[1]) code |= 4; // bottom
-         else if (p[1] > bbox[3]) code |= 8; // top
+             return scoreA - scoreB;
+           }
 
-         return code;
-       }
+           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.
 
-       var whichPolygon_1 = whichPolygon;
+             lines.enter().append('path').attr('class', function (d) {
+               var prefix = 'way line'; // if this line isn't styled by its own tags
 
-       function whichPolygon(data) {
-         var bboxes = [];
+               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
 
-         for (var i = 0; i < data.features.length; i++) {
-           var feature = data.features[i];
-           var coords = feature.geometry.coordinates;
+                 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';
+                 }
+               }
 
-           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));
-             }
+               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;
            }
-         }
 
-         var tree = rbush_1().load(bboxes);
+           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 query(p, multi) {
-           var output = [],
-               result = tree.search({
-             minX: p[0],
-             minY: p[1],
-             maxX: p[0],
-             maxY: p[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;
+             });
 
-           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 (detected.ie) {
+               markers.each(function () {
+                 this.parentNode.insertBefore(this, this);
+               });
              }
            }
 
-           return multi && output.length ? output : null;
-         }
-
-         query.tree = tree;
+           var getPath = svgPath(projection, graph);
+           var ways = [];
+           var onewaydata = {};
+           var sideddata = {};
+           var oldMultiPolygonOuters = {};
 
-         query.bbox = function queryBBox(bbox) {
-           var output = [];
-           var result = tree.search({
-             minX: bbox[0],
-             minY: bbox[1],
-             maxX: bbox[2],
-             maxY: bbox[3]
-           });
+           for (var i = 0; i < entities.length; i++) {
+             var entity = entities[i];
+             var outer = osmOldMultipolygonOuterMember(entity, graph);
 
-           for (var i = 0; i < result.length; i++) {
-             if (polygonIntersectsBBox(result[i].coords, bbox)) {
-               output.push(result[i].props);
+             if (outer) {
+               ways.push(entity.mergeTags(outer.tags));
+               oldMultiPolygonOuters[outer.id] = true;
+             } else if (entity.geometry(graph) === 'line') {
+               ways.push(entity);
              }
            }
 
-           return output;
-         };
-
-         return query;
-       }
-
-       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(polygon[i], bbox).length > 0) return true;
-         }
-
-         return false;
-       } // ray casting algorithm for detecting if point is in polygon
+           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
 
+           var uncovered = selection.selectAll('.layer-osm.lines'); // over areas
 
-       function insidePolygon(rings, p) {
-         var inside = false;
+           var touchLayer = selection.selectAll('.layer-touch.lines'); // Draw lines..
 
-         for (var i = 0, len = rings.length; i < len; i++) {
-           var ring = rings[i];
+           [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..
 
-           for (var j = 0, len2 = ring.length, k = len2 - 1; j < len2; k = j++) {
-             if (rayIntersect(p, ring[j], ring[k])) inside = !inside;
-           }
+           touchLayer.call(drawTargets, graph, ways, filter);
          }
 
-         return inside;
+         return drawLines;
        }
 
-       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];
-       }
+       function svgMidpoints(projection, context) {
+         var targetRadius = 8;
 
-       function treeItem(coords, props) {
-         var item = {
-           minX: Infinity,
-           minY: Infinity,
-           maxX: -Infinity,
-           maxY: -Infinity,
-           coords: coords,
-           props: props
-         };
+         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
 
-         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]);
+           targets.exit().remove(); // enter/update
+
+           targets.enter().append('circle').attr('r', targetRadius).merge(targets).attr('class', function (d) {
+             return 'node midpoint target ' + fillClass + d.id;
+           }).attr('transform', getTransform);
          }
 
-         return item;
-       }
+         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();
 
-       var type = "FeatureCollection";
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-       var rawBorders = {
-       type: type,
-       features: features
-       };
+           if (mode && mode.id !== 'select' || !context.map().withinEditableZoom()) {
+             drawLayer.selectAll('.midpoint').remove();
+             touchLayer.selectAll('.midpoint.target').remove();
+             return;
+           }
 
-       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);
+           var poly = extent.polygon();
+           var midpoints = {};
 
-       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];
+             if (entity.type !== 'way') continue;
+             if (!filter(entity)) continue;
+             if (context.selectedIDs().indexOf(entity.id) < 0) continue;
+             var nodes = graph.childNodes(entity);
 
-         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);
-         }
+             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('-');
 
-         for (var _i in borders.features) {
-           var _feature2 = borders.features[_i];
+               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;
 
-           _feature2.properties.groups.sort(function (groupID1, groupID2) {
-             return levels.indexOf(featuresByCode[groupID1].properties.level) - levels.indexOf(featuresByCode[groupID2].properties.level);
-           });
+                 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]]);
 
-           loadMembersForGroupsOf(_feature2);
-         }
+                     if (point && geoVecLength(projection(a.loc), projection(point)) > 20 && geoVecLength(projection(b.loc), projection(point)) > 20) {
+                       loc = point;
+                       break;
+                     }
+                   }
+                 }
 
-         var geometryOnlyCollection = {
-           type: 'RegionFeatureCollection',
-           features: geometryFeatures
-         };
-         whichPolygonGetter = whichPolygon_1(geometryOnlyCollection);
+                 if (loc) {
+                   midpoints[id] = {
+                     type: 'midpoint',
+                     id: id,
+                     loc: loc,
+                     edge: [a.id, b.id],
+                     parents: [entity]
+                   };
+                 }
+               }
+             }
+           }
 
-         function loadGroups(feature) {
-           var props = feature.properties;
+           function midpointFilter(d) {
+             if (midpoints[d.id]) return true;
 
-           if (!props.groups) {
-             props.groups = [];
-           }
+             for (var i = 0; i < d.parents.length; i++) {
+               if (filter(d.parents[i])) {
+                 return true;
+               }
+             }
 
-           if (props.country) {
-             props.groups.push(props.country);
+             return false;
            }
 
-           if (props.m49 !== '001') {
-             props.groups.push('001');
-           }
-         }
+           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.
 
-         function loadM49(feature) {
-           var props = feature.properties;
+           groups.select('polygon.shadow');
+           groups.select('polygon.fill'); // Draw touch targets..
 
-           if (!props.m49 && props.iso1N3) {
-             props.m49 = props.iso1N3;
-           }
+           touchLayer.call(drawTargets, graph, Object.values(midpoints), midpointFilter);
          }
 
-         function loadIsoStatus(feature) {
-           var props = feature.properties;
+         return drawMidpoints;
+       }
 
-           if (!props.isoStatus && props.iso1A2) {
-             props.isoStatus = 'official';
-           }
+       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');
          }
 
-         function loadLevel(feature) {
-           var props = feature.properties;
-           if (props.level) return;
+         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.
 
-           if (!props.country) {
-             props.level = 'country';
-           } else if (props.isoStatus === 'official') {
-             props.level = 'territory';
-           } else {
-             props.level = 'subterritory';
-           }
+
+         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);
          }
 
-         function loadRoadSpeedUnit(feature) {
-           var props = feature.properties;
+         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
 
-           if (props.roadSpeedUnit === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
-             props.roadSpeedUnit = 'km/h';
-           }
-         }
+             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
 
-         function loadDriveSide(feature) {
-           var props = feature.properties;
+           targets.exit().remove(); // enter/update
 
-           if (props.driveSide === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
-             props.driveSide = 'right';
-           }
+           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 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;
-         }
+         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..
 
-         function loadMembersForGroupsOf(feature) {
-           var featureID = feature.properties.id;
-           var standardizedGroupIDs = [];
+           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..
 
-           for (var j in feature.properties.groups) {
-             var groupID = feature.properties.groups[j];
-             var groupFeature = featuresByCode[groupID];
-             standardizedGroupIDs.push(groupFeature.properties.id);
 
-             if (groupFeature.properties.members) {
-               groupFeature.properties.members.push(featureID);
-             } else {
-               groupFeature.properties.members = [featureID];
-             }
-           }
+           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..
 
-           feature.properties.groups = standardizedGroupIDs;
-         }
+           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
 
-         function cacheFeatureByIDs(feature) {
-           for (var k in identifierProps) {
-             var prop = identifierProps[k];
-             var id = prop && feature.properties[prop];
+           groups.select('.stroke'); // propagate bound data
 
-             if (id) {
-               id = id.replace(idFilterRegex, '').toUpperCase();
-               featuresByCode[id] = feature;
-             }
-           }
+           groups.select('.icon') // propagate bound data
+           .attr('xlink:href', function (entity) {
+             var preset = _mainPresetIndex.match(entity, graph);
+             var picon = preset && preset.icon;
 
-           if (feature.properties.aliases) {
-             for (var j in feature.properties.aliases) {
-               var alias = feature.properties.aliases[j].replace(idFilterRegex, '').toUpperCase();
-               featuresByCode[alias] = feature;
+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return '#' + picon + (isMaki ? '-11' : '');
              }
-           }
-         }
-       }
+           }); // Draw touch targets..
 
-       function locArray(loc) {
-         if (Array.isArray(loc)) {
-           return loc;
-         } else if (loc.coordinates) {
-           return loc.coordinates;
+           touchLayer.call(drawTargets, graph, points, filter);
          }
 
-         return loc.geometry.coordinates;
-       }
-
-       function smallestFeature(loc) {
-         var query = locArray(loc);
-         var featureProperties = whichPolygonGetter(query);
-         if (!featureProperties) return null;
-         return featuresByCode[featureProperties.id];
+         return drawPoints;
        }
 
-       function countryFeature(loc) {
-         var feature = smallestFeature(loc);
-         if (!feature) return null;
-         var countryCode = feature.properties.country || feature.properties.iso1A2;
-         return featuresByCode[countryCode];
-       }
+       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;
+         }
 
-       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 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
 
-           for (var i in features) {
-             var _feature3 = features[i];
+             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
 
-             if (_feature3.properties.level === targetLevel || levels.indexOf(_feature3.properties.level) > targetLevelIndex) {
-               return _feature3;
-             }
+             return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' + 'rotate(' + a * 180 / Math.PI + ')';
            }
 
-           return null;
-         }
-
-         return countryFeature(loc);
-       }
+           var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
+           var touchLayer = selection.selectAll('.layer-touch.turns'); // Draw turns..
 
-       function featureForID(id) {
-         var stringID;
+           var groups = drawLayer.selectAll('g.turn').data(turns, function (d) {
+             return d.key;
+           }); // exit
 
-         if (typeof id === 'number') {
-           stringID = id.toString();
+           groups.exit().remove(); // enter
 
-           if (stringID.length === 1) {
-             stringID = '00' + stringID;
-           } else if (stringID.length === 2) {
-             stringID = '0' + stringID;
-           }
-         } else {
-           stringID = id.replace(idFilterRegex, '').toUpperCase();
-         }
+           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
 
-         return featuresByCode[stringID] || null;
-       }
+           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 smallestOrMatchingFeature(query) {
-         if (_typeof(query) === 'object') {
-           return smallestFeature(query);
-         }
+           groups.select('circle'); // propagate bound data
+           // Draw touch targets..
 
-         return featureForID(query);
-       }
+           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           groups = touchLayer.selectAll('g.turn').data(turns, function (d) {
+             return d.key;
+           }); // exit
 
-       function feature$1(query, opts) {
-         if (_typeof(query) === 'object') {
-           return featureForLoc(query, opts);
-         }
+           groups.exit().remove(); // enter
 
-         return featureForID(query);
-       }
-       function iso1A2Code(query, opts) {
-         var match = feature$1(query, opts);
-         if (!match) return null;
-         return match.properties.iso1A2 || null;
-       }
-       function featuresContaining(query, strict) {
-         var feature = smallestOrMatchingFeature(query);
-         if (!feature) return [];
-         var features = [];
+           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
 
-         if (!strict || _typeof(query) === 'object') {
-           features.push(feature);
-         }
+           groups = groups.merge(groupsEnter).attr('transform', turnTransform);
+           groups.select('rect'); // propagate bound data
 
-         var properties = feature.properties;
+           groups.select('circle'); // propagate bound data
 
-         for (var i in properties.groups) {
-           var groupID = properties.groups[i];
-           features.push(featuresByCode[groupID]);
+           return this;
          }
 
-         return features;
-       }
-       function roadSpeedUnit(query) {
-         var feature = smallestOrMatchingFeature(query);
-         return feature && feature.properties.roadSpeedUnit || null;
+         return drawTurns;
        }
 
-       var _dataDeprecated;
-
-       var _nsi;
+       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]
+         };
 
-       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
+         var _currHoverTarget;
 
-         _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
+         var _currPersistent = {};
+         var _currHover = {};
+         var _prevHover = {};
+         var _currSelected = {};
+         var _prevSelected = {};
+         var _radii = {};
 
-           _nsi.matcher.buildMatchIndex(d.brands); // index all known wikipedia and wikidata tags
+         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.
 
 
-           Object.keys(d.brands).forEach(function (kvnd) {
-             var brand = d.brands[kvnd];
-             var wd = brand.tags['brand:wikidata'];
-             var wp = brand.tags['brand:wikipedia'];
+         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 (wd) {
-               _nsi.wikidata[wd] = kvnd;
-             }
+         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();
 
-             if (wp) {
-               _nsi.wikipedia[wp] = kvnd;
-             }
-           });
-           return _nsi;
-         })["catch"](function () {
-           /* ignore */
-         });
+           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 oldTagIssues(entity, graph) {
-           var oldTags = Object.assign({}, entity.tags); // shallow copy
 
-           var preset = _mainPresetIndex.match(entity, graph);
-           var subtype = 'deprecated_tags';
-           if (!preset) return []; // upgrade preset..
+           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;
+           }
 
-           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..
+           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 (entity.id !== activeID && entity.isEndpoint(graph) && !entity.isConnected(graph)) {
+                   r += 1.5;
+                 }
 
-           if (_dataDeprecated) {
-             var deprecatedTags = entity.deprecatedTags(_dataDeprecated);
+                 if (klass === 'shadow') {
+                   // remember this value, so we don't need to
+                   _radii[entity.id] = r; // recompute it when we draw the touch targets
+                 }
 
-             if (deprecatedTags.length) {
-               deprecatedTags.forEach(function (tag) {
-                 graph = actionUpgradeTags(entity.id, tag.old, tag.replace)(graph);
+                 select(this).attr('r', r).attr('visibility', i && klass === 'fill' ? 'hidden' : null);
                });
-               entity = graph.entity(entity.id);
-             }
-           } // add missing addTags..
-
-
-           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];
-                 }
-               }
              });
            }
 
-           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;
-
-             if (newTags.wikidata) {
-               // try matching `wikidata`
-               isBrand = _nsi.wikidata[newTags.wikidata];
-             }
-
-             if (!isBrand && newTags.wikipedia) {
-               // fallback to `wikipedia`
-               isBrand = _nsi.wikipedia[newTags.wikipedia];
-             }
+           vertices.sort(sortY);
+           var groups = selection.selectAll('g.vertex').filter(filter).data(vertices, fastEntityKey); // exit
 
-             if (isBrand && !newTags.office) {
-               // but avoid doing this for corporate offices
-               if (newTags.wikidata) {
-                 newTags['brand:wikidata'] = newTags.wikidata;
-                 delete newTags.wikidata;
-               }
+           groups.exit().remove(); // enter
 
-               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.
+           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.
 
-             } // try key/value|name match against name-suggestion-index
+           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`.
 
-             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);
+           var iconUse = groups.selectAll('.icon').data(function data(d) {
+             return zoom >= 17 && getIcon(d) ? [d] : [];
+           }, fastEntityKey); // exit
 
-                 var match = _nsi.matcher.matchKVN(k, newTags[k], newTags.name, countryCode && countryCode.toLowerCase());
+           iconUse.exit().remove(); // enter
 
-                 if (!match) continue; // for now skip ambiguous matches (like Target~(USA) vs Target~(Australia))
+           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
 
-                 if (match.d) continue;
-                 var brand = _nsi.brands[match.kvnd];
+           var dgroups = groups.selectAll('.viewfieldgroup').data(function data(d) {
+             return zoom >= 18 && getDirections(d) ? [d] : [];
+           }, fastEntityKey); // exit
 
-                 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];
-                     }
+           dgroups.exit().remove(); // enter/update
 
-                     return acc;
-                   }, {});
-                   nsiKeys.forEach(function (k) {
-                     return delete newTags[k];
-                   });
-                   Object.assign(newTags, brand.tags, keepTags);
-                   break;
-                 }
-               }
-             }
-           } // determine diff
+           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
 
+           viewfields.exit().remove(); // enter/update
 
-           var tagDiff = utilTagDiff(oldTags, newTags);
-           if (!tagDiff.length) return [];
-           var isOnlyAddingTags = tagDiff.every(function (d) {
-             return d.type === '+';
+           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 prefix = '';
-
-           if (subtype === 'noncanonical_brand') {
-             prefix = 'noncanonical_brand.';
-           } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
-             subtype = 'incomplete_tags';
-             prefix = 'incomplete.';
-           } // don't allow autofixing brand tags
-
-
-           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'));
-                 }
-               })];
-             }
-           })];
-
-           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 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 showMessage(context) {
-             var currEntity = context.hasEntity(entity.id);
-             if (!currEntity) return '';
-             var messageID = "issues.outdated_tags.".concat(prefix, "message");
+             var vertexType = svgPassiveVertex(node, graph, activeID);
 
-             if (subtype === 'noncanonical_brand' && isOnlyAddingTags) {
-               messageID += '_incomplete';
+             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 _t.html(messageID, {
-               feature: utilDisplayLabel(currEntity, context.graph())
-             });
-           }
+           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
 
-           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;
-             });
-           }
-         }
+           targets.exit().remove(); // enter/update
 
-         function oldMultipolygonIssues(entity, graph) {
-           var multipolygon, outerWay;
+           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 (entity.type === 'relation') {
-             outerWay = osmOldMultipolygonOuterMemberOfRelation(entity, graph);
-             multipolygon = entity;
-           } else if (entity.type === 'way') {
-             multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
-             outerWay = entity;
-           } else {
-             return [];
-           }
+           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
 
-           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'));
-                 }
-               })];
-             }
-           })];
+           nopes.exit().remove(); // enter/update
 
-           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);
-           }
+           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 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'));
-           }
+         function renderAsVertex(entity, graph, wireframe, zoom) {
+           var geometry = entity.geometry(graph);
+           return geometry === 'vertex' || geometry === 'point' && (wireframe || zoom >= 18 && entity.directions(graph, projection).length);
          }
 
-         var validation = function checkOutdatedTags(entity, graph) {
-           var issues = oldMultipolygonIssues(entity, graph);
-           if (!issues.length) issues = oldTagIssues(entity, graph);
-           return issues;
-         };
-
-         validation.type = type;
-         return validation;
-       }
-
-       function validationPrivateData() {
-         var type = 'private_data'; // assume that some buildings are private
-
-         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 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);
+         }
 
-         var publicKeys = {
-           amenity: true,
-           craft: true,
-           historic: true,
-           leisure: true,
-           office: true,
-           shop: true,
-           tourism: true
-         }; // these tags may contain personally identifying info
+         function getSiblingAndChildVertices(ids, graph, wireframe, zoom) {
+           var results = {};
+           var seenIds = {};
 
-         var personalTags = {
-           'contact:email': true,
-           'contact:fax': true,
-           'contact:phone': true,
-           email: true,
-           fax: true,
-           phone: true
-         };
+           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);
 
-         var validation = function checkPrivateData(entity) {
-           var tags = entity.tags;
-           if (!tags.building || !privateBuildingValues[tags.building]) return [];
-           var keepTags = {};
+             if (!context.features().isHiddenFeature(entity, graph, geometry)) {
+               var i;
 
-           for (var k in tags) {
-             if (publicKeys[k]) return []; // probably a public feature
+               if (entity.type === 'way') {
+                 for (i = 0; i < entity.nodes.length; i++) {
+                   var child = graph.hasEntity(entity.nodes[i]);
 
-             if (!personalTags[k]) {
-               keepTags[k] = tags[k];
-             }
-           }
+                   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);
 
-           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'));
+                   if (member) {
+                     addChildVertices(member);
+                   }
                  }
-               })];
+               } else if (renderAsVertex(entity, graph, wireframe, zoom)) {
+                 results[entity.id] = entity;
+               }
              }
-           })];
+           }
 
-           function doUpgrade(graph) {
-             var currEntity = graph.hasEntity(entity.id);
-             if (!currEntity) return graph;
-             var newTags = Object.assign({}, currEntity.tags); // shallow copy
+           ids.forEach(function (id) {
+             var entity = graph.hasEntity(id);
+             if (!entity) return;
 
-             tagDiff.forEach(function (diff) {
-               if (diff.type === '-') {
-                 delete newTags[diff.key];
-               } else if (diff.type === '+') {
-                 newTags[diff.key] = diff.newVal;
+             if (entity.type === 'node') {
+               if (renderAsVertex(entity, graph, wireframe, zoom)) {
+                 results[entity.id] = entity;
+                 graph.parentWays(entity).forEach(function (entity) {
+                   addChildVertices(entity);
+                 });
                }
-             });
-             return actionChangeTags(currEntity.id, newTags)(graph);
-           }
+             } else {
+               // way, relation
+               addChildVertices(entity);
+             }
+           });
+           return results;
+         }
 
-           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())
-             });
-           }
+         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');
 
-           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;
-             });
-           }
-         };
+           if (fullRedraw) {
+             _currPersistent = {};
+             _radii = {};
+           } // Collect important vertices from the `entities` list..
+           // (during a partial redraw, it will not contain everything)
 
-         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.
+           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..
 
-         _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 */
-         });
+             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..
 
-         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")
 
+             if (!keep && !fullRedraw) {
+               delete _currPersistent[entity.id];
+             }
+           } // 3 sets of vertices to consider:
 
-         function nameMatchesRawTag(lowercaseName, tags) {
-           for (var i = 0; i < keysToTestForGenericValues.length; i++) {
-             var key = keysToTestForGenericValues[i];
-             var val = tags[key];
 
-             if (val) {
-               val = val.toLowerCase();
+           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)
 
-               if (key === lowercaseName || val === lowercaseName || key.replace(/\_/g, ' ') === lowercaseName || val.replace(/\_/g, ' ') === lowercaseName) {
-                 return true;
-               }
-             }
-           }
+           };
+           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 false;
-         }
+           var filterRendered = function filterRendered(d) {
+             return d.id in _currPersistent || d.id in _currSelected || d.id in _currHover || filter(d);
+           };
 
-         function isGenericName(name, tags) {
-           name = name.toLowerCase();
-           return nameMatchesRawTag(name, tags) || isDiscardedSuggestionName(name);
-         }
+           drawLayer.call(draw, graph, currentVisible(all), sets, filterRendered); // Draw touch targets..
+           // When drawing, render all targets (not just those affected by a partial redraw)
 
-         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
+           var filterTouch = function filterTouch(d) {
+             return isMoving ? true : filterRendered(d);
+           };
 
-                   delete tags[nameKey];
-                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_generic_name.annotation'));
-                 }
-               })];
-             }
-           });
+           touchLayer.call(drawTargets, graph, currentVisible(all), filterTouch);
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));
+           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 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
 
-                   delete tags[nameKey];
-                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_mistaken_name.annotation'));
+         drawVertices.drawSelected = function (selection, graph, extent) {
+           var wireframe = context.surface().classed('fill-wireframe');
+           var zoom = geoScaleToZoom(projection.scale());
+           _prevSelected = _currSelected || {};
+
+           if (context.map().isInWideSelection()) {
+             _currSelected = {};
+             context.selectedIDs().forEach(function (id) {
+               var entity = graph.hasEntity(id);
+               if (!entity) return;
+
+               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..
 
-           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(';');
+           var filter = function filter(d) {
+             return d.id in _prevSelected;
+           };
 
-           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];
+           drawVertices(selection, graph, Object.values(_prevSelected), filter, extent, false);
+         }; // partial redraw - only update the hovered items..
 
-             if (notNames.length) {
-               for (var i in notNames) {
-                 var notName = notNames[i];
 
-                 if (notName && value === notName) {
-                   issues.push(makeIncorrectNameIssue(entity.id, key, value, langCode));
-                   continue;
-                 }
-               }
-             }
+         drawVertices.drawHover = function (selection, graph, target, extent) {
+           if (target === _currHoverTarget) return; // continue only if something changed
 
-             if (isGenericName(value, entity.tags)) {
-               issues.push(makeGenericNameIssue(entity.id, key, value, langCode));
-             }
-           }
+           var wireframe = context.surface().classed('fill-wireframe');
+           var zoom = geoScaleToZoom(projection.scale());
+           _prevHover = _currHover || {};
+           _currHoverTarget = target;
+           var entity = target && target.properties && target.properties.entity;
 
-           return issues;
+           if (entity) {
+             _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
+           } else {
+             _currHover = {};
+           } // note that drawVertices will add `_currHover` automatically if needed..
+
+
+           var filter = function filter(d) {
+             return d.id in _prevHover;
+           };
+
+           drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
          };
 
-         validation.type = type;
-         return validation;
+         return drawVertices;
        }
 
-       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 epsilon = 0.05;
-         var nodeThreshold = 10;
+       function utilBindOnce(target, type, listener, capture) {
+         var typeOnce = type + '.once';
 
-         function isBuilding(entity, graph) {
-           if (entity.type !== 'way' || entity.geometry(graph) !== 'area') return false;
-           return entity.tags.building && entity.tags.building !== 'no';
+         function one() {
+           target.on(typeOnce, null);
+           listener.apply(this, arguments);
          }
 
-         var validation = function checkUnsquareWay(entity, graph) {
-           if (!isBuilding(entity, graph)) return []; // don't flag ways marked as physically unsquare
+         target.on(typeOnce, one, capture);
+         return this;
+       }
 
-           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
+       function defaultFilter(d3_event) {
+         return !d3_event.ctrlKey && !d3_event.button;
+       }
 
-           var nodes = graph.childNodes(entity).slice(); // shallow copy
+       function defaultExtent() {
+         var e = this;
 
-           if (nodes.length > nodeThreshold + 1) return []; // +1 because closing node appears twice
-           // ignore if not all nodes are fully downloaded
+         if (e instanceof SVGElement) {
+           e = e.ownerSVGElement || e;
 
-           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 (e.hasAttribute('viewBox')) {
+             e = e.viewBox.baseVal;
+             return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+           }
 
-           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
+           return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
+         }
 
-           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
+         return [[0, 0], [e.clientWidth, e.clientHeight]];
+       }
 
-           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
+       function defaultWheelDelta(d3_event) {
+         return -d3_event.deltaY * (d3_event.deltaMode === 1 ? 0.05 : d3_event.deltaMode ? 1 : 0.002);
+       }
 
-             autoArgs = [autoAction, _t('operations.orthogonalize.annotation.feature', {
-               n: 1
-             })];
-           }
+       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));
+       }
 
-           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 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;
 
-                   context.perform(actionOrthogonalize(entityId, context.projection, undefined, degreeThreshold), _t('operations.orthogonalize.annotation.feature', {
-                     n: 1
-                   })); // run after the squaring transition (currently 150ms)
+         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);
+         }
 
-                   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')
-                       );
-                   }
-               })
-               */
-               ];
-             }
-           })];
+         zoom.transform = function (collection, transform, point) {
+           var selection = collection.selection ? collection.selection() : collection;
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unsquare_way.buildings.reference'));
+           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);
+             });
            }
          };
 
-         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
-       });
-
-       function coreValidator(context) {
-         var dispatch$1 = dispatch('validated', 'focusedIssue');
-         var validator = utilRebind({}, dispatch$1, 'on');
-         var _rules = {};
-         var _disabledRules = {};
-         var _ignoredIssueIDs = {}; // issue.id -> true
+         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);
+         };
 
-         var _baseCache = validationCache(); // issues before any user edits
+         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);
+           });
+         };
 
-         var _headCache = validationCache(); // issues after all user edits
+         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);
+         };
 
+         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);
+         }
 
-         var _validatedGraph = 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);
+         }
 
-         var _deferred = new Set(); //
-         // initialize the validator rulesets
-         //
+         function centroid(extent) {
+           return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+         }
 
+         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);
+               }
 
-         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;
+               g.zoom(null, null, t);
+             };
            });
-           var disabledRules = corePreferences('validate-disabledRules');
-
-           if (disabledRules) {
-             disabledRules.split(',').forEach(function (key) {
-               _disabledRules[key] = true;
-             });
-           }
-         };
+         }
 
-         function reset(resetIgnored) {
-           Array.from(_deferred).forEach(function (handle) {
-             window.cancelIdleCallback(handle);
+         function gesture(that, args, clean) {
+           return !clean && _activeGesture || new Gesture(that, args);
+         }
 
-             _deferred["delete"](handle);
-           }); // clear caches
+         function Gesture(that, args) {
+           this.that = that;
+           this.args = args;
+           this.active = 0;
+           this.extent = extent.apply(that, args);
+         }
 
-           if (resetIgnored) _ignoredIssueIDs = {};
-           _baseCache = validationCache();
-           _headCache = validationCache();
-           _validatedGraph = null;
-         } //
-         // clear caches, called whenever iD resets after a save
-         //
+         Gesture.prototype = {
+           start: function start(d3_event) {
+             if (++this.active === 1) {
+               _activeGesture = this;
+               dispatch.call('start', this, d3_event);
+             }
 
+             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);
+             }
 
-         validator.reset = function () {
-           reset(true);
+             return this;
+           }
          };
 
-         validator.resetIgnoredIssues = function () {
-           _ignoredIssueIDs = {}; // reload UI
-
-           dispatch$1.call('validated');
-         }; // must update issues when the user changes the unsquare thereshold
-
+         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.
 
-         validator.reloadUnsquareIssues = function () {
-           reloadUnsquareIssues(_headCache, context.graph());
-           reloadUnsquareIssues(_baseCache, context.history().base());
-           dispatch$1.call('validated');
-         };
+           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 reloadUnsquareIssues(cache, graph) {
-           var checkUnsquareWay = _rules.unsquare_way;
-           if (typeof checkUnsquareWay !== 'function') return; // uncache existing
+             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);
+           }
 
-           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
+           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));
 
-           buildings.forEach(function (entity) {
-             var detected = checkUnsquareWay(entity, graph);
-             if (detected.length !== 1) return;
-             var issue = detected[0];
+           function wheelidled() {
+             g.wheel = null;
+             g.end(d3_event);
+           }
+         }
 
-             if (!cache.issuesByEntityID[entity.id]) {
-               cache.issuesByEntityID[entity.id] = new Set();
-             }
+         var _downPointerIDs = new Set();
 
-             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'
-         // };
+         var _pointerLocGetter;
 
+         function pointerdown(d3_event) {
+           _downPointerIDs.add(d3_event.pointerId);
 
-         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..
+           if (!filter.apply(this, arguments)) return;
+           var g = gesture(this, arguments, _downPointerIDs.size === 1);
+           var started;
+           d3_event.stopImmediatePropagation();
+           _pointerLocGetter = utilFastMouse(this);
 
-             var entityIds = issue.entityIds || [];
+           var loc = _pointerLocGetter(d3_event);
 
-             for (var i = 0; i < entityIds.length; i++) {
-               var entityId = entityIds[i];
+           var p = [loc, _transform.invert(loc), d3_event.pointerId];
 
-               if (!context.hasEntity(entityId)) {
-                 delete _headCache.issuesByEntityID[entityId];
-                 delete _headCache.issuesByIssueID[issue.id];
-                 return false;
-               }
-             }
+           if (!g.pointer0) {
+             g.pointer0 = p;
+             started = true;
+           } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
+             g.pointer1 = p;
+           }
 
-             if (opts.what === 'edited' && _baseCache.issuesByIssueID[issue.id]) return false;
+           if (started) {
+             interrupt(this);
+             g.start(d3_event);
+           }
+         }
 
-             if (opts.where === 'visible') {
-               var extent = issue.extent(context.graph());
-               if (!view.intersects(extent)) return false;
-             }
+         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;
 
-             return true;
-           });
-         };
+           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;
+           }
 
-         validator.getResolvedIssues = function () {
-           var baseIssues = Object.values(_baseCache.issuesByIssueID);
-           return baseIssues.filter(function (issue) {
-             return !_headCache.issuesByIssueID[issue.id];
-           });
-         };
+           d3_event.preventDefault();
+           d3_event.stopImmediatePropagation();
 
-         validator.focusIssue = function (issue) {
-           var extent = issue.extent(context.graph());
+           var loc = _pointerLocGetter(d3_event);
 
-           if (extent) {
-             var setZoom = Math.max(context.map().zoom(), 19);
-             context.map().unobscuredCenterZoomEase(extent.center(), setZoom); // select the first entity
+           var t, p, l;
+           if (isPointer0) g.pointer0[0] = loc;else if (isPointer1) g.pointer1[0] = loc;
+           t = _transform;
 
-             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 (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;
            }
-         };
-
-         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
 
+           g.zoom(d3_event, 'touch', constrain(translate(t, p, l), g.extent, translateExtent));
+         }
 
-         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
-
-         validator.getSharedEntityIssues = function (entityIDs, options) {
-           var cache = _headCache; // gather the issues that are common to all the entities
+         function pointerup(d3_event) {
+           if (!_downPointerIDs.has(d3_event.pointerId)) return;
 
-           var issueIDs = entityIDs.reduce(function (acc, entityID) {
-             var entityIssueIDs = cache.issuesByEntityID[entityID] || new Set();
+           _downPointerIDs["delete"](d3_event.pointerId);
 
-             if (!acc) {
-               return new Set(entityIssueIDs);
-             }
+           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;
 
-             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;
-             }
+           if (g.pointer1 && !g.pointer0) {
+             g.pointer0 = g.pointer1;
+             delete g.pointer1;
+           }
 
-             var index1 = orderedIssueTypes.indexOf(issue1.type);
-             var index2 = orderedIssueTypes.indexOf(issue2.type);
+           if (g.pointer0) {
+             g.pointer0[1] = _transform.invert(g.pointer0[0]);
+           } else {
+             g.end(d3_event);
+           }
+         }
 
-             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;
-             }
-           });
+         zoom.wheelDelta = function (_) {
+           return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
          };
 
-         validator.getEntityIssues = function (entityID, options) {
-           return validator.getSharedEntityIssues([entityID], options);
+         zoom.filter = function (_) {
+           return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
          };
 
-         validator.getRuleKeys = function () {
-           return Object.keys(_rules);
+         zoom.extent = function (_) {
+           return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
          };
 
-         validator.isRuleEnabled = function (key) {
-           return !_disabledRules[key];
+         zoom.scaleExtent = function (_) {
+           return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
          };
 
-         validator.toggleRule = function (key) {
-           if (_disabledRules[key]) {
-             delete _disabledRules[key];
-           } else {
-             _disabledRules[key] = true;
-           }
-
-           corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-           validator.validate();
+         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]]];
          };
 
-         validator.disableRules = function (keys) {
-           _disabledRules = {};
-           keys.forEach(function (k) {
-             _disabledRules[k] = true;
-           });
-           corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-           validator.validate();
+         zoom.constrain = function (_) {
+           return arguments.length ? (constrain = _, zoom) : constrain;
          };
 
-         validator.ignoreIssue = function (id) {
-           _ignoredIssueIDs[id] = true;
-         }; //
-         // Run validation on a single entity for the given graph
-         //
+         zoom.interpolate = function (_) {
+           return arguments.length ? (interpolate = _, zoom) : interpolate;
+         };
 
+         zoom._transform = function (_) {
+           return arguments.length ? (_transform = _, zoom) : _transform;
+         };
 
-         function validateEntity(entity, graph) {
-           var entityIssues = []; // runs validation and appends resulting issues
+         return utilRebind(zoom, dispatch, 'on');
+       }
 
-           function runValidation(key) {
-             var fn = _rules[key];
+       // if pointer events are supported. Falls back to default `dblclick` event.
 
-             if (typeof fn !== 'function') {
-               console.error('no such validation rule = ' + key); // eslint-disable-line no-console
+       function utilDoubleUp() {
+         var dispatch = dispatch$8('doubleUp');
+         var _maxTimespan = 500; // milliseconds
 
-               return;
-             }
+         var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices
 
-             var detected = fn(entity, graph);
-             entityIssues = entityIssues.concat(detected);
-           } // run all rules
+         var _pointer; // object representing the pointer that could trigger double up
 
 
-           Object.keys(_rules).forEach(runValidation);
-           return entityIssues;
+         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 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];
-
-             if (entity.type === 'node') {
-               graph.parentWays(entity).forEach(function (parentWay) {
-                 acc.add(parentWay.id); // include parent ways
-
-                 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
-
-                 graph._parentWays[nodeID].forEach(function (wayID) {
-                   acc.add(wayID); // include connected ways
-                 });
-               });
-             }
-
-             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 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
 
+           if (_pointer && !pointerIsValidFor(loc)) {
+             // if this pointer is no longer valid, clear it so another can be started
+             _pointer = undefined;
+           }
 
-         function validateEntities(entityIDs, graph, cache) {
-           // clear caches for existing issues related to these entities
-           entityIDs.forEach(cache.uncacheEntityID); // detect new issues and update caches
+           if (!_pointer) {
+             _pointer = {
+               startLoc: loc,
+               startTime: new Date().getTime(),
+               upCount: 0,
+               pointerId: d3_event.pointerId
+             };
+           } else {
+             // double down
+             _pointer.pointerId = d3_event.pointerId;
+           }
+         }
 
-           entityIDs.forEach(function (entityID) {
-             var entity = graph.hasEntity(entityID); // don't validate deleted entities
+         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 (!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.
-         //
+           if (_pointer.upCount === 2) {
+             // double up!
+             var loc = [d3_event.clientX, d3_event.clientY];
 
+             if (pointerIsValidFor(loc)) {
+               var locInThis = utilFastMouse(this)(d3_event);
+               dispatch.call('doubleUp', this, d3_event, locInThis);
+             } // clear the pointer info in any case
 
-         validator.validate = function () {
-           var currGraph = context.graph();
-           _validatedGraph = _validatedGraph || context.history().base();
 
-           if (currGraph === _validatedGraph) {
-             dispatch$1.call('validated');
-             return;
+             _pointer = undefined;
            }
+         }
 
-           var oldGraph = _validatedGraph;
-           var difference = coreDifference(oldGraph, currGraph);
-           _validatedGraph = currGraph;
-           var createdAndModifiedEntityIDs = difference.extantIDs(true); // created/modified (true = w/relation members)
-
-           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)
-
-           var modifiedAndDeletedEntityIDs = difference.deleted().concat(difference.modified()).map(function (entity) {
-             return entity.id;
-           });
-           var entityIDsToCheckForOldGraph = entityIDsToValidate(modifiedAndDeletedEntityIDs, oldGraph); // concat the sets
+         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));
+             });
+           }
+         }
 
-           entityIDsToCheckForOldGraph.forEach(entityIDsToCheck.add, entityIDsToCheck);
-           validateEntities(entityIDsToCheck, context.graph(), _headCache);
-           dispatch$1.call('validated');
+         doubleUp.off = function (selection) {
+           selection.on('pointerdown.doubleUp', null).on('pointerup.doubleUp', null).on('dblclick.doubleUp', null);
          };
 
-         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;
+         return utilRebind(doubleUp, dispatch, 'on');
        }
 
-       function validationCache() {
-         var cache = {
-           issuesByIssueID: {},
-           // issue.id -> issue
-           issuesByEntityID: {} // entity.id -> set(issue.id)
-
-         };
-
-         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();
-               }
+       var TILESIZE = 256;
+       var minZoom = 2;
+       var maxZoom = 24;
+       var kMin = geoZoomToScale(minZoom, TILESIZE);
+       var kMax = geoZoomToScale(maxZoom, TILESIZE);
 
-               cache.issuesByEntityID[entityId].add(issue.id);
-             });
-             cache.issuesByIssueID[issue.id] = issue;
-           });
-         };
+       function clamp$1(num, min, max) {
+         return Math.max(min, Math.min(num, max));
+       }
 
-         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];
-         };
+       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;
 
-         cache.uncacheIssues = function (issues) {
-           issues.forEach(cache.uncacheIssue);
-         };
+         var _selection = select(null);
 
-         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
-         //
+         var supersurface = select(null);
+         var wrapper = select(null);
+         var surface = select(null);
+         var _dimensions = [1, 1];
+         var _dblClickZoomEnabled = true;
+         var _redrawEnabled = true;
 
+         var _gestureTransformStart;
 
-         cache.uncacheEntityID = function (entityID) {
-           var issueIDs = cache.issuesByEntityID[entityID];
-           if (!issueIDs) return;
-           issueIDs.forEach(function (issueID) {
-             var issue = cache.issuesByIssueID[issueID];
+         var _transformStart = projection.transform();
 
-             if (issue) {
-               cache.uncacheIssue(issue);
-             } else {
-               delete cache.issuesByIssueID[issueID];
-             }
-           });
-           delete cache.issuesByEntityID[entityID];
-         };
+         var _transformLast;
 
-         return cache;
-       }
+         var _isTransformed = false;
+         var _minzoom = 0;
 
-       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 = [];
+         var _getMouseCoords;
 
-         var _origChanges;
+         var _lastPointerEvent;
 
-         var _discardTags = {};
-         _mainFileFetcher.get('discarded').then(function (d) {
-           _discardTags = d;
-         })["catch"](function () {
-           /* ignore */
-         });
-         var uploader = utilRebind({}, dispatch$1, 'on');
+         var _lastWithinEditableZoom; // whether a pointerdown event started the zoom
 
-         uploader.isSaving = function () {
-           return _isSaving;
-         };
 
-         uploader.save = function (changeset, tryAgain, checkConflicts) {
-           // Guard against accidentally entering save code twice - #4641
-           if (_isSaving && !tryAgain) {
-             return;
-           }
+         var _pointerDown = false; // use pointer events on supported platforms; fallback to mouse events
 
-           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.
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom
 
-           if (!osm.authenticated()) {
-             osm.authenticate(function (err) {
-               if (!err) {
-                 uploader.save(changeset, tryAgain, checkConflicts); // continue where we left off..
-               }
-             });
-             return;
-           }
 
-           if (!_isSaving) {
-             _isSaving = true;
-             dispatch$1.call('saveStarted', this);
-           }
+         var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;
 
-           var history = context.history();
-           _conflicts = [];
-           _errors = []; // Store original changes, in case user wants to download them as an .osc file
+         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;
+         });
 
-           _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 _doubleUpHandler = utilDoubleUp();
 
-           if (!tryAgain) {
-             history.perform(actionNoop());
-           } // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = 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 });
+         // }
 
 
-           if (!checkConflicts) {
-             upload(changeset); // Do the full (slow) conflict check..
-           } else {
-             performFullConflictCheck(changeset);
-           }
-         };
+         function cancelPendingRedraw() {
+           scheduleRedraw.cancel(); // isRedrawScheduled = false;
+           // window.cancelIdleCallback(pendingRedrawCall);
+         }
 
-         function performFullConflictCheck(changeset) {
+         function map(selection) {
+           _selection = selection;
+           context.on('change.map', immediateRedraw);
            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 = [];
-
-           for (var i = 0; i < summary.length; i++) {
-             var item = summary[i];
 
-             if (item.changeType === 'modified') {
-               _toCheck.push(item.entity.id);
-             }
+           if (osm) {
+             osm.on('change.map', immediateRedraw);
            }
 
-           var _toLoad = withChildNodes(_toCheck, localGraph);
+           function didUndoOrRedo(targetTransform) {
+             var mode = context.mode().id;
+             if (mode !== 'browse' && mode !== 'select') return;
 
-           var _loaded = {};
-           var _toLoadCount = 0;
-           var _toLoadTotal = _toLoad.length;
+             if (targetTransform) {
+               map.transformEase(targetTransform);
+             }
+           }
 
-           if (_toCheck.length) {
-             dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
+           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
 
-             _toLoad.forEach(function (id) {
-               _loaded[id] = false;
-             });
+           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
 
-             osm.loadMultiple(_toLoad, loaded);
-           } else {
-             upload(changeset);
-           }
+           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;
 
-           return;
+             if (d3_event.button === 2) {
+               d3_event.stopPropagation();
+             }
+           }, true).on(_pointerPrefix + 'up.zoom', function (d3_event) {
+             _lastPointerEvent = d3_event;
 
-           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);
-                 }
+             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.call('drawn', this, {
+                 full: false
                });
-             });
-             return Array.from(s);
-           } // Reload modified entities into an alternate graph and check for conflicts..
+             }
+           }).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
 
+           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
 
-           function loaded(err, result) {
-             if (_errors.length) return;
 
-             if (err) {
-               _errors.push({
-                 msg: err.message || err.responseText,
-                 details: [_t('save.status_code', {
-                   code: err.status
-                 })]
-               });
+           updateAreaFill();
 
-               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..
+           _doubleUpHandler.on('doubleUp.map', function (d3_event, p0) {
+             if (!_dblClickZoomEnabled) return; // don't zoom if targeting something other than the map itself
 
-                 var i, id;
+             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);
+           });
 
-                 if (entity.type === 'way') {
-                   for (i = 0; i < entity.nodes.length; i++) {
-                     id = entity.nodes[i];
+           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 (_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;
+             var graph = context.graph();
+             var selectedAndParents = {};
+             context.selectedIDs().forEach(function (id) {
+               var entity = graph.hasEntity(id);
 
-                     if (_loaded[id] === undefined) {
-                       _loaded[id] = false;
-                       loadMore.push(id);
-                     }
-                   }
+               if (entity) {
+                 selectedAndParents[entity.id] = entity;
+
+                 if (entity.type === 'node') {
+                   graph.parentWays(entity).forEach(function (parent) {
+                     selectedAndParents[parent.id] = parent;
+                   });
                  }
-               });
-               _toLoadCount += result.data.length;
-               _toLoadTotal += loadMore.length;
-               dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
+               }
+             });
+             var data = Object.values(selectedAndParents);
 
-               if (loadMore.length) {
-                 _toLoad.push.apply(_toLoad, loadMore);
+             var filter = function filter(d) {
+               return d.id in selectedAndParents;
+             };
 
-                 osm.loadMultiple(loadMore, loaded);
-               }
+             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
 
-               if (!_toLoad.length) {
-                 detectConflicts();
-                 upload(changeset);
-               }
-             }
-           }
+             scheduleRedraw();
+           });
+           map.dimensions(utilGetDimensions(selection));
+         }
 
-           function detectConflicts() {
-             function choice(id, text, _action) {
-               return {
-                 id: id,
-                 text: text,
-                 action: function action() {
-                   history.replace(_action);
-                 }
-               };
-             }
+         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;
 
-             function formatUser(d) {
-               return '<a href="' + osm.userURL(d) + '" target="_blank">' + d + '</a>';
-             }
+             for (var i = 0; i < listeners.length; i++) {
+               var listener = listeners[i];
 
-             function entityName(entity) {
-               return utilDisplayName(entity) || utilDisplayType(entity.id) + ' ' + entity.id;
+               if (listener.name === 'zoom' && listener.type === 'mouseup') {
+                 hasOrphan = true;
+                 break;
+               }
              }
 
-             function sameVersions(local, remote) {
-               if (local.version !== remote.version) return false;
+             if (hasOrphan) {
+               var event = window.CustomEvent;
 
-               if (local.type === 'way') {
-                 var children = utilArrayUnion(local.nodes, remote.nodes);
+               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.
 
-                 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;
-                 }
-               }
 
-               return true;
+               event.view = window;
+               window.dispatchEvent(event);
              }
+           }
 
-             _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
-
-               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'));
+           return d3_event.button !== 2; // ignore right clicks
+         }
 
-               _conflicts.push({
-                 id: id,
-                 name: entityName(local),
-                 details: mergeConflicts,
-                 chosen: 1,
-                 choices: [choice(id, keepMine, forceLocal), choice(id, keepTheirs, forceRemote)]
-               });
-             });
-           }
+         function pxCenter() {
+           return [_dimensions[0] / 2, _dimensions[1] / 2];
          }
 
-         function upload(changeset) {
-           var osm = context.connection();
+         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;
 
-           if (!osm) {
-             _errors.push({
-               msg: 'No OSM Service'
+           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
 
-           if (_conflicts.length) {
-             didResultInConflicts(changeset);
-           } else if (_errors.length) {
-             didResultInErrors();
+             applyFeatureLayerFilters = false;
+           } else if (difference) {
+             var complete = difference.complete(map.extent());
+             data = Object.values(complete).filter(Boolean);
+             set = new Set(Object.keys(complete));
+
+             filter = function filter(d) {
+               return set.has(d.id);
+             };
+
+             features.clear(data);
            } else {
-             var history = context.history();
-             var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+             // 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 (changes.modified.length || changes.created.length || changes.deleted.length) {
-               dispatch$1.call('willAttemptUpload', this);
-               osm.putChangeset(changeset, changes, uploadCallback);
+             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);
+               };
              } else {
-               // changes were insignificant or reverted by user
-               didResultInNoChanges();
+               data = all;
+               fullRedraw = true;
+               filter = utilFunctor(true);
              }
            }
-         }
-
-         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
-                 })]
-               });
 
-               didResultInErrors();
-             }
+           if (applyFeatureLayerFilters) {
+             data = features.filter(data, graph);
            } else {
-             didResultInSuccess(changeset);
+             context.features().resetStats();
            }
-         }
 
-         function didResultInNoChanges() {
-           dispatch$1.call('resultNoChanges', this);
-           endSave();
-           context.flush(); // reset iD
-         }
+           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 didResultInErrors() {
-           context.history().pop();
-           dispatch$1.call('resultErrors', this, _errors);
-           endSave();
+           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
+           });
          }
 
-         function didResultInConflicts(changeset) {
-           _conflicts.sort(function (a, b) {
-             return b.id.localeCompare(a.id);
-           });
+         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);
+         };
 
-           dispatch$1.call('resultConflicts', this, changeset, _conflicts, _origChanges);
-           endSave();
-         }
+         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();
 
-         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
+           if (mode && !allowed[mode.id]) {
+             context.enter(modeBrowse(context));
+           }
 
-           window.setTimeout(function () {
-             endSave();
-             context.flush(); // reset iD
-           }, 2500);
+           dispatch.call('drawn', this, {
+             full: true
+           });
          }
 
-         function endSave() {
-           _isSaving = false;
-           dispatch$1.call('saveEnded', this);
+         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
+
+           e2._rotation = e.rotation; // preserve the original rotation
+
+           _selection.node().dispatchEvent(e2);
          }
 
-         uploader.cancelConflictResolution = function () {
-           context.history().pop();
-         };
+         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.
 
-         uploader.processResolvedConflicts = function (changeset) {
-           var history = context.history();
+           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 (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
+
+
+               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
+
+               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
 
-           for (var i = 0; i < _conflicts.length; i++) {
-             if (_conflicts[i].chosen === 1) {
-               // user chose "use theirs"
-               var entity = context.hasEntity(_conflicts[i].id);
 
-               if (entity && entity.type === 'way') {
-                 var children = utilArrayUniq(entity.nodes);
+             if (x2 !== x || y2 !== y || k2 !== k) {
+               x = x2;
+               y = y2;
+               k = k2;
+               eventTransform = identity$2.translate(x2, y2).scale(k2);
 
-                 for (var j = 0; j < children.length; j++) {
-                   history.replace(actionRevert(children[j]));
-                 }
+               if (_zoomerPanner._transform) {
+                 // utilZoomPan interface
+                 _zoomerPanner._transform(eventTransform);
+               } else {
+                 // d3_zoom interface
+                 _selection.node().__zoom = eventTransform;
                }
-
-               history.replace(actionRevert(_conflicts[i].id));
              }
            }
 
-           uploader.save(changeset, true, false); // tryAgain = true, checkConflicts = false
-         };
-
-         uploader.reset = function () {};
-
-         return uploader;
-       }
+           if (_transformStart.x === x && _transformStart.y === y && _transformStart.k === k) {
+             return; // no change
+           }
 
-       var abs$4 = Math.abs;
-       var exp$2 = Math.exp;
-       var E = Math.E;
+           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;
+           }
 
-       var FORCED$g = fails(function () {
-         return Math.sinh(-2e-17) != -2e-17;
-       });
+           projection.transform(eventTransform);
+           var withinEditableZoom = map.withinEditableZoom();
 
-       // `Math.sinh` method
-       // https://tc39.es/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);
-         }
-       });
+           if (_lastWithinEditableZoom !== withinEditableZoom) {
+             if (_lastWithinEditableZoom !== undefined) {
+               // notify that the map zoomed in or out over the editable zoom threshold
+               dispatch.call('crossEditableZoom', this, withinEditableZoom);
+             }
 
-       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
+             _lastWithinEditableZoom = withinEditableZoom;
+           }
 
-       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;
-       });
+           var scale = k / _transformStart.k;
+           var tX = (x / scale - _transformStart.x) * scale;
+           var tY = (y / scale - _transformStart.y) * scale;
 
-       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);
-       }
+           if (context.inIntro()) {
+             curtainProjection.transform({
+               x: x - tX,
+               y: y - tY,
+               k: k
+             });
+           }
 
-       function vintageRange(vintage) {
-         var s;
+           if (source) {
+             _lastPointerEvent = event;
+           }
 
-         if (vintage.start || vintage.end) {
-           s = vintage.start || '?';
+           _isTransformed = true;
+           _transformLast = eventTransform;
+           utilSetTransform(supersurface, tX, tY, scale);
+           scheduleRedraw();
+           dispatch.call('move', this, map);
 
-           if (vintage.start !== vintage.end) {
-             s += ' - ' + (vintage.end || '?');
+           function isInteger(val) {
+             return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;
            }
          }
 
-         return s;
-       }
+         function resetTransform() {
+           if (!_isTransformed) return false;
+           utilSetTransform(supersurface, 0, 0);
+           _isTransformed = false;
 
-       function rendererBackgroundSource(data) {
-         var source = Object.assign({}, data); // shallow copy
+           if (context.inIntro()) {
+             curtainProjection.transform(projection.transform());
+           }
 
-         var _offset = [0, 0];
-         var _name = source.name;
-         var _description = source.description;
+           return true;
+         }
 
-         var _best = !!source.best;
+         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 _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;
+           if (resetTransform()) {
+             difference = extent = undefined;
+           }
 
-         source.tileSize = data.tileSize || 256;
-         source.zoomExtent = data.zoomExtent || [0, 22];
-         source.overzoom = data.overzoom !== false;
+           var zoom = map.zoom();
+           var z = String(~~zoom);
 
-         source.offset = function (val) {
-           if (!arguments.length) return _offset;
-           _offset = val;
-           return source;
-         };
+           if (surface.attr('data-zoom') !== z) {
+             surface.attr('data-zoom', z);
+           } // class surface as `lowzoom` around z17-z18.5 (based on latitude)
 
-         source.nudge = function (val, zoomlevel) {
-           _offset[0] += val[0] / Math.pow(2, zoomlevel);
-           _offset[1] += val[1] / Math.pow(2, zoomlevel);
-           return source;
-         };
 
-         source.name = function () {
-           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-           return _t('imagery.' + id_safe + '.name', {
-             "default": _name
-           });
-         };
+           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));
 
-         source.label = function () {
-           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-           return _t.html('imagery.' + id_safe + '.name', {
-             "default": _name
-           });
-         };
+           if (!difference) {
+             supersurface.call(context.background());
+             wrapper.call(drawLayers);
+           } // OSM
 
-         source.description = function () {
-           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-           return _t.html('imagery.' + id_safe + '.description', {
-             "default": _description
-           });
-         };
 
-         source.best = function () {
-           return _best;
-         };
+           if (map.editableDataEnabled() || map.isInWideSelection()) {
+             context.loadTiles(projection);
+             drawEditable(difference, extent);
+           } else {
+             editOff();
+           }
 
-         source.area = function () {
-           if (!data.polygon) return Number.MAX_VALUE; // worldwide
+           _transformStart = projection.transform();
+           return map;
+         }
 
-           var area = d3_geoArea({
-             type: 'MultiPolygon',
-             coordinates: [data.polygon]
-           });
-           return isNaN(area) ? 0 : area;
+         var immediateRedraw = function immediateRedraw(difference, extent) {
+           if (!difference && !extent) cancelPendingRedraw();
+           redraw(difference, extent);
          };
 
-         source.imageryUsed = function () {
-           return _name || source.id;
+         map.lastPointerEvent = function () {
+           return _lastPointerEvent;
          };
 
-         source.template = function (val) {
-           if (!arguments.length) return _template;
-
-           if (source.id === 'custom') {
-             _template = val;
-           }
-
-           return source;
-         };
+         map.mouse = function (d3_event) {
+           var event = d3_event || _lastPointerEvent;
 
-         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)
+           if (event) {
+             var s;
 
-           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';
+             while (s = event.sourceEvent) {
+               event = s;
              }
-           }
-
-           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;
-               };
-
-               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)));
-
-               switch (source.projection) {
-                 case 'EPSG:4326':
-                   return {
-                     x: lon * 180 / Math.PI,
-                     y: lat * 180 / Math.PI
-                   };
-
-                 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 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;
-
-                 case 'proj':
-                   return projection;
-
-                 case 'wkid':
-                   return projection.replace(/^EPSG:/, '');
-
-                 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;
-                   }
-
-                 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();
-               }
+             return _getMouseCoords(event);
+           }
 
-               return u;
-             });
-           } // these apply to any type..
+           return null;
+         }; // returns Lng/Lat
 
 
-           result = result.replace(/\{switch:([^}]+)\}/, function (s, r) {
-             var subdomains = r.split(',');
-             return subdomains[(coord[0] + coord[1]) % subdomains.length];
-           });
-           return result;
+         map.mouseCoordinates = function () {
+           var coord = map.mouse() || pxCenter();
+           return projection.invert(coord);
          };
 
-         source.validZoom = function (z) {
-           return source.zoomExtent[0] <= z && (source.overzoom || source.zoomExtent[1] > z);
+         map.dblclickZoomEnable = function (val) {
+           if (!arguments.length) return _dblClickZoomEnabled;
+           _dblClickZoomEnabled = val;
+           return map;
          };
 
-         source.isLocatorOverlay = function () {
-           return source.id === 'mapbox_locator_overlay';
+         map.redrawEnable = function (val) {
+           if (!arguments.length) return _redrawEnabled;
+           _redrawEnabled = val;
+           return map;
          };
-         /* hides a source from the list, but leaves it available for use */
 
-
-         source.isHidden = function () {
-           return source.id === 'DigitalGlobe-Premium-vintage' || source.id === 'DigitalGlobe-Standard-vintage';
+         map.isTransformed = function () {
+           return _isTransformed;
          };
 
-         source.copyrightNotices = function () {};
-
-         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 setTransform(t2, duration, force) {
+           var t = projection.transform();
+           if (!force && t2.k === t.k && t2.x === t.x && t2.y === t.y) return false;
 
-         return source;
-       }
+           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;
 
-       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
+             _selection.call(_zoomerPanner.transform, _transformStart);
+           }
 
-         var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q'; // iD
+           return true;
+         }
 
-         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 */
-         });
+         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
 
-         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(', ');
-         };
+           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);
+         }
 
-         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
+         map.pan = function (delta, duration) {
+           var t = projection.translate();
+           var k = projection.scale();
+           t[0] += delta[0];
+           t[1] += delta[1];
 
-           var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint + '?zl=' + zoom + '&key=' + key;
-           if (inflight[tileID]) 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();
 
-           if (!cache[tileID]) {
-             cache[tileID] = {};
-           }
+             _selection.call(_zoomerPanner.transform, _transformStart);
 
-           if (cache[tileID] && cache[tileID].metadata) {
-             return callback(null, cache[tileID].metadata);
+             dispatch.call('move', this, map);
+             immediateRedraw();
            }
 
-           inflight[tileID] = true;
-           d3_json(url).then(function (result) {
-             delete inflight[tileID];
-
-             if (!result) {
-               throw new Error('Unknown Error');
-             }
-
-             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 map;
          };
 
-         bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
-         return bing;
-       };
+         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;
+         };
 
-       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 zoomIn(delta) {
+           setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
          }
 
-         var esri = rendererBackgroundSource(data);
-         var cache = {};
-         var inflight = {};
-
-         var _prevCenter; // use a tilemap service to set maximum zoom for esri tiles dynamically
-         // https://developers.arcgis.com/documentation/tiled-elevation-service/
-
-
-         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
-
-           var z = 20; // first generate a random url using the template
-
-           var dummyUrl = esri.url([1, 2, 3]); // calculate url z/y/x from the lat/long of the center of the map
-
-           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
-
-           d3_json(tilemapUrl).then(function (tilemap) {
-             if (!tilemap) {
-               throw new Error('Unknown Error');
-             }
-
-             var hasTiles = true;
-
-             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
-
+         function zoomOut(delta) {
+           setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
+         }
 
-             esri.zoomExtent[1] = hasTiles ? 22 : 19;
-           })["catch"](function () {
-             /* ignore */
-           });
+         map.zoomIn = function () {
+           zoomIn(1);
          };
 
-         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 unknown = _t('info_panels.background.unknown');
-           var metadataLayer;
-           var vintage = {};
-           var metadata = {};
-           if (inflight[tileID]) return;
+         map.zoomInFurther = function () {
+           zoomIn(4);
+         };
 
-           switch (true) {
-             case zoom >= 20 && esri.id === 'EsriWorldImageryClarity':
-               metadataLayer = 4;
-               break;
+         map.canZoomIn = function () {
+           return map.zoom() < maxZoom;
+         };
 
-             case zoom >= 19:
-               metadataLayer = 3;
-               break;
+         map.zoomOut = function () {
+           zoomOut(1);
+         };
 
-             case zoom >= 17:
-               metadataLayer = 2;
-               break;
+         map.zoomOutFurther = function () {
+           zoomOut(4);
+         };
 
-             case zoom >= 13:
-               metadataLayer = 0;
-               break;
+         map.canZoomOut = function () {
+           return map.zoom() > minZoom;
+         };
 
-             default:
-               metadataLayer = 99;
+         map.center = function (loc2) {
+           if (!arguments.length) {
+             return projection.invert(pxCenter());
            }
 
-           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/';
+           if (setCenterZoom(loc2, map.zoom())) {
+             dispatch.call('move', this, map);
            }
 
-           url += metadataLayer + '/query?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';
-
-           if (!cache[tileID]) {
-             cache[tileID] = {};
-           }
+           scheduleRedraw();
+           return map;
+         };
 
-           if (cache[tileID] && cache[tileID].metadata) {
-             return callback(null, cache[tileID].metadata);
-           } // accurate metadata is only available >= 13
+         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
 
+           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 (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];
+         map.unobscuredOffsetPx = function () {
+           var openPane = context.container().select('.map-panes .map-pane.shown');
 
-               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
+           if (!openPane.empty()) {
+             return [openPane.node().offsetWidth / 2, 0];
+           }
 
-               if (isFinite(metadata.resolution)) {
-                 metadata.resolution += ' m';
-               }
+           return [0, 0];
+         };
 
-               if (isFinite(metadata.accuracy)) {
-                 metadata.accuracy += ' m';
-               }
+         map.zoom = function (z2) {
+           if (!arguments.length) {
+             return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
+           }
 
-               cache[tileID].metadata = metadata;
-               if (callback) callback(null, metadata);
-             })["catch"](function (err) {
-               delete inflight[tileID];
-               if (callback) callback(err.message);
-             });
+           if (z2 < _minzoom) {
+             surface.interrupt();
+             dispatch.call('hitMinZoom', this, map);
+             z2 = context.minEditableZoom();
            }
 
-           function clean(val) {
-             return String(val).trim() || unknown;
+           if (setCenterZoom(map.center(), z2)) {
+             dispatch.call('move', this, map);
            }
-         };
 
-         return esri;
-       };
+           scheduleRedraw();
+           return map;
+         };
 
-       rendererBackgroundSource.None = function () {
-         var source = rendererBackgroundSource({
-           id: 'none',
-           template: ''
-         });
+         map.centerZoom = function (loc2, z2) {
+           if (setCenterZoom(loc2, z2)) {
+             dispatch.call('move', this, map);
+           }
 
-         source.name = function () {
-           return _t('background.none');
+           scheduleRedraw();
+           return map;
          };
 
-         source.label = function () {
-           return _t.html('background.none');
+         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);
          };
 
-         source.imageryUsed = function () {
-           return null;
+         map.centerEase = function (loc2, duration) {
+           duration = duration || 250;
+           setCenterZoom(loc2, map.zoom(), duration);
+           return map;
          };
 
-         source.area = function () {
-           return -1; // sources in background pane are sorted by area
+         map.zoomEase = function (z2, duration) {
+           duration = duration || 250;
+           setCenterZoom(map.center(), z2, duration, false);
+           return map;
          };
 
-         return source;
-       };
-
-       rendererBackgroundSource.Custom = function (template) {
-         var source = rendererBackgroundSource({
-           id: 'custom',
-           template: template
-         });
-
-         source.name = function () {
-           return _t('background.custom');
+         map.centerZoomEase = function (loc2, z2, duration) {
+           duration = duration || 250;
+           setCenterZoom(loc2, z2, duration, false);
+           return map;
          };
 
-         source.label = function () {
-           return _t.html('background.custom');
+         map.transformEase = function (t2, duration) {
+           duration = duration || 250;
+           setTransform(t2, duration, false
+           /* don't force */
+           );
+           return map;
          };
 
-         source.imageryUsed = function () {
-           // sanitize personal connection tokens - #6801
-           var cleaned = source.template(); // from query string parameters
+         map.zoomToEase = function (obj, duration) {
+           var extent;
 
-           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}';
+           if (Array.isArray(obj)) {
+             obj.forEach(function (entity) {
+               var entityExtent = entity.extent(context.graph());
+
+               if (!extent) {
+                 extent = entityExtent;
+               } else {
+                 extent = extent.extend(entityExtent);
                }
              });
-             cleaned = parts[0] + '?' + utilQsString(qs, true); // true = soft encode
-           } // from wms/wmts api path parameters
-
+           } else {
+             extent = obj.extent(context.graph());
+           }
 
-           cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
-           return 'Custom (' + cleaned + ' )';
+           if (!isFinite(extent.area())) return map;
+           var z2 = clamp$1(map.trimmedExtentZoom(extent), 0, 20);
+           return map.centerZoomEase(extent.center(), z2, duration);
          };
 
-         source.area = function () {
-           return -2; // sources in background pane are sorted by area
+         map.startEase = function () {
+           utilBindOnce(surface, _pointerPrefix + 'down.ease', function () {
+             map.cancelEase();
+           });
+           return map;
          };
 
-         return source;
-       };
-
-       function rendererTileLayer(context) {
-         var transformProp = utilPrefixCSSProperty('Transform');
-         var tiler = utilTiler();
-         var _tileSize = 256;
-
-         var _projection;
-
-         var _cache = {};
-
-         var _tileOrigin;
-
-         var _zoom;
-
-         var _source;
-
-         function tileSizeAtZoom(d, z) {
-           var EPSILON = 0.002; // close seams
-
-           return _tileSize * Math.pow(2, z - d[2]) / _tileSize + EPSILON;
-         }
-
-         function atZoom(t, distance) {
-           var power = Math.pow(2, distance);
-           return [Math.floor(t[0] * power), Math.floor(t[1] * power), t[2] + distance];
-         }
+         map.cancelEase = function () {
+           _selection.interrupt();
 
-         function lookUp(d) {
-           for (var up = -1; up > -d[2]; up--) {
-             var tile = atZoom(d, up);
+           return map;
+         };
 
-             if (_cache[_source.url(tile)] !== false) {
-               return tile;
-             }
+         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));
            }
-         }
-
-         function uniqueBy(a, n) {
-           var o = [];
-           var seen = {};
+         };
 
-           for (var i = 0; i < a.length; i++) {
-             if (seen[a[i][n]] === undefined) {
-               o.push(a[i]);
-               seen[a[i][n]] = true;
-             }
+         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));
            }
+         };
 
-           return o;
+         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 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 addSource(d) {
-           d.push(_source.url(d));
-           return d;
-         } // Update tiles based on current state of `projection`.
+         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 background(selection) {
-           _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
-           var pixelOffset;
+         map.withinEditableZoom = function () {
+           return map.zoom() >= context.minEditableZoom();
+         };
 
-           if (_source) {
-             pixelOffset = [_source.offset()[0] * Math.pow(2, _zoom), _source.offset()[1] * Math.pow(2, _zoom)];
-           } else {
-             pixelOffset = [0, 0];
-           }
+         map.isInWideSelection = function () {
+           return !map.withinEditableZoom() && context.selectedIDs().length;
+         };
 
-           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).
+         map.editableDataEnabled = function (skipZoomCheck) {
+           var layer = context.layers().layer('osm');
+           if (!layer || !layer.enabled()) return false;
+           return skipZoomCheck || map.withinEditableZoom();
+         };
 
+         map.notesEditable = function () {
+           var layer = context.layers().layer('notes');
+           if (!layer || !layer.enabled()) return false;
+           return map.withinEditableZoom();
+         };
 
-         function render(selection) {
-           if (!_source) return;
-           var requests = [];
-           var showDebug = context.getDebug('tile') && !_source.overlay;
+         map.minzoom = function (val) {
+           if (!arguments.length) return _minzoom;
+           _minzoom = val;
+           return map;
+         };
 
-           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
+         map.toggleHighlightEdited = function () {
+           surface.classed('highlight-edited', !surface.classed('highlight-edited'));
+           map.pan([0, 0]); // trigger a redraw
 
-               requests.push(d);
+           dispatch.call('changeHighlighting', this);
+         };
 
-               if (_cache[d[3]] === false && lookUp(d)) {
-                 requests.push(addSource(lookUp(d)));
-               }
-             });
-             requests = uniqueBy(requests, 3).filter(function (r) {
-               // don't re-request tiles which have failed in the past
-               return _cache[r[3]] !== false;
-             });
-           }
+         map.areaFillOptions = ['wireframe', 'partial', 'full'];
 
-           function load(d3_event, d) {
-             _cache[d[3]] = true;
-             select(this).on('error', null).on('load', null).classed('tile-loaded', true);
-             render(selection);
-           }
+         map.activeAreaFill = function (val) {
+           if (!arguments.length) return corePreferences('area-fill') || 'partial';
+           corePreferences('area-fill', val);
 
-           function error(d3_event, d) {
-             _cache[d[3]] = false;
-             select(this).on('error', null).on('load', null).remove();
-             render(selection);
+           if (val !== 'wireframe') {
+             corePreferences('area-fill-toggle', val);
            }
 
-           function imageTransform(d) {
-             var ts = _tileSize * Math.pow(2, _zoom - d[2]);
+           updateAreaFill();
+           map.pan([0, 0]); // trigger a redraw
 
-             var scale = tileSizeAtZoom(d, _zoom);
-             return 'translate(' + (d[0] * ts - _tileOrigin[0]) + 'px,' + (d[1] * ts - _tileOrigin[1]) + 'px) ' + 'scale(' + scale + ',' + scale + ')';
-           }
+           dispatch.call('changeAreaFill', this);
+           return map;
+         };
 
-           function tileCenter(d) {
-             var ts = _tileSize * Math.pow(2, _zoom - d[2]);
+         map.toggleWireframe = function () {
+           var activeFill = map.activeAreaFill();
 
-             return [d[0] * ts - _tileOrigin[0] + ts / 2, d[1] * ts - _tileOrigin[1] + ts / 2];
+           if (activeFill === 'wireframe') {
+             activeFill = corePreferences('area-fill-toggle') || 'partial';
+           } else {
+             activeFill = 'wireframe';
            }
 
-           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)
-
-
-           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);
+           map.activeAreaFill(activeFill);
+         };
 
-             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];
+         function updateAreaFill() {
+           var activeFill = map.activeAreaFill();
+           map.areaFillOptions.forEach(function (opt) {
+             surface.classed('fill-' + opt, Boolean(opt === activeFill));
            });
-           debug.exit().remove();
-
-           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));
-
-               _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'));
-               });
-             });
-           }
          }
 
-         background.projection = function (val) {
-           if (!arguments.length) return _projection;
-           _projection = val;
-           return background;
-         };
-
-         background.dimensions = function (val) {
-           if (!arguments.length) return tiler.size();
-           tiler.size(val);
-           return background;
+         map.layers = function () {
+           return drawLayers;
          };
 
-         background.source = function (val) {
-           if (!arguments.length) return _source;
-           _source = val;
-           _tileSize = _source.tileSize;
-           _cache = {};
-           tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
-           return background;
+         map.doubleUpHandler = function () {
+           return _doubleUpHandler;
          };
 
-         return background;
+         return utilRebind(map, dispatch, 'on');
        }
 
-       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;
+       function rendererPhotos(context) {
+         var dispatch = dispatch$8('change');
+         var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'kartaview'];
+         var _allPhotoTypes = ['flat', 'panoramic'];
 
-         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 _shownPhotoTypes = _allPhotoTypes.slice(); // shallow copy
 
-             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 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
+         var _dateFilters = ['fromDate', 'toDate'];
 
-             _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 _fromDate;
 
-             _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None()); // Add 'Custom'
+         var _toDate;
 
+         var _usernames;
 
-             var template = corePreferences('background-custom-template') || '';
-             var custom = rendererBackgroundSource.Custom(template);
+         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;
+           });
 
-             _imageryIndex.backgrounds.unshift(custom);
+           if (enabled.length) {
+             hash.photo_overlay = enabled.join(',');
+           } else {
+             delete hash.photo_overlay;
+           }
 
-             return _imageryIndex;
-           });
+           window.location.replace('#' + utilQsString(hash, true));
          }
 
-         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
+         photos.overlayLayerIDs = function () {
+           return _layerIDs;
+         };
 
-           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
+         photos.allPhotoTypes = function () {
+           return _allPhotoTypes;
+         };
+
+         photos.dateFilters = function () {
+           return _dateFilters;
+         };
 
+         photos.dateFilterValue = function (val) {
+           return val === _dateFilters[0] ? _fromDate : _toDate;
+         };
 
-           var sources = background.sources(context.map().extent());
-           var wasValid = _isValid;
-           _isValid = !!sources.filter(function (d) {
-             return d === currSource;
-           }).length;
+         photos.setDateFilter = function (type, val, updateUrl) {
+           // validate the date
+           var date = val && new Date(val);
 
-           if (wasValid !== _isValid) {
-             // change in valid status
-             background.updateImagery();
+           if (date && !isNaN(date)) {
+             val = date.toISOString().substr(0, 10);
+           } else {
+             val = null;
            }
 
-           var baseFilter = '';
-
-           if (detected.cssfilters) {
-             if (_brightness !== 1) {
-               baseFilter += " brightness(".concat(_brightness, ")");
-             }
+           if (type === _dateFilters[0]) {
+             _fromDate = val;
 
-             if (_contrast !== 1) {
-               baseFilter += " contrast(".concat(_contrast, ")");
+             if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+               _toDate = _fromDate;
              }
+           }
 
-             if (_saturation !== 1) {
-               baseFilter += " saturate(".concat(_saturation, ")");
-             }
+           if (type === _dateFilters[1]) {
+             _toDate = val;
 
-             if (_sharpness < 1) {
-               // gaussian blur
-               var blur = d3_interpolateNumber(0.5, 5)(1 - _sharpness);
-               baseFilter += " blur(".concat(blur, "px)");
+             if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+               _fromDate = _toDate;
              }
            }
 
-           var base = selection.selectAll('.layer-background').data([0]);
-           base = base.enter().insert('div', '.layer-data').attr('class', 'layer layer-background').merge(base);
+           dispatch.call('change', this);
 
-           if (detected.cssfilters) {
-             base.style('filter', baseFilter || null);
-           } else {
-             base.style('opacity', _brightness);
-           }
+           if (updateUrl) {
+             var rangeString;
 
-           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 (_fromDate || _toDate) {
+               rangeString = (_fromDate || '') + '_' + (_toDate || '');
+             }
 
-           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, ")");
+             setUrlFilterValue('photo_dates', rangeString);
            }
+         };
 
-           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);
-           });
-         }
-
-         background.updateImagery = function () {
-           var currSource = baseLayer.source();
-           if (context.inIntro() || !currSource) return;
-
-           var o = _overlayLayers.filter(function (d) {
-             return !d.source().isLocatorOverlay() && !d.source().isHidden();
-           }).map(function (d) {
-             return d.source().id;
-           }).join(',');
+         photos.setUsernameFilter = function (val, updateUrl) {
+           if (val && typeof val === 'string') val = val.replace(/;/g, ',').split(',');
 
-           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 (val) {
+             val = val.map(function (d) {
+               return d.trim();
+             }).filter(Boolean);
 
-           if (id === 'custom') {
-             id = "custom:".concat(currSource.template());
+             if (!val.length) {
+               val = null;
+             }
            }
 
-           if (id) {
-             hash.background = id;
-           } else {
-             delete hash.background;
-           }
+           _usernames = val;
+           dispatch.call('change', this);
 
-           if (o) {
-             hash.overlays = o;
-           } else {
-             delete hash.overlays;
-           }
+           if (updateUrl) {
+             var hashString;
 
-           if (Math.abs(x) > EPSILON || Math.abs(y) > EPSILON) {
-             hash.offset = "".concat(x, ",").concat(y);
-           } else {
-             delete hash.offset;
+             if (_usernames) {
+               hashString = _usernames.join(',');
+             }
+
+             setUrlFilterValue('photo_username', hashString);
            }
+         };
 
+         function setUrlFilterValue(property, val) {
            if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);
+
+             if (val) {
+               if (hash[property] === val) return;
+               hash[property] = val;
+             } else {
+               if (!(property in hash)) return;
+               delete hash[property];
+             }
+
              window.location.replace('#' + utilQsString(hash, true));
            }
+         }
 
-           var imageryUsed = [];
-           var photoOverlaysUsed = [];
-           var currUsed = currSource.imageryUsed();
+         function showsLayer(id) {
+           var layer = context.layers().layer(id);
+           return layer && layer.supported() && layer.enabled();
+         }
 
-           if (currUsed && _isValid) {
-             imageryUsed.push(currUsed);
-           }
+         photos.shouldFilterByDate = function () {
+           return showsLayer('mapillary') || showsLayer('kartaview') || showsLayer('streetside');
+         };
 
-           _overlayLayers.filter(function (d) {
-             return !d.source().isLocatorOverlay() && !d.source().isHidden();
-           }).forEach(function (d) {
-             return imageryUsed.push(d.source().imageryUsed());
-           });
+         photos.shouldFilterByPhotoType = function () {
+           return showsLayer('mapillary') || showsLayer('streetside') && showsLayer('kartaview');
+         };
 
-           var dataLayer = context.layers().layer('data');
+         photos.shouldFilterByUsername = function () {
+           return !showsLayer('mapillary') && showsLayer('kartaview') && !showsLayer('streetside');
+         };
 
-           if (dataLayer && dataLayer.enabled() && dataLayer.hasData()) {
-             imageryUsed.push(dataLayer.getSrc());
-           }
+         photos.showsPhotoType = function (val) {
+           if (!photos.shouldFilterByPhotoType()) return true;
+           return _shownPhotoTypes.indexOf(val) !== -1;
+         };
 
-           var photoOverlayLayers = {
-             streetside: 'Bing Streetside',
-             mapillary: 'Mapillary Images',
-             'mapillary-map-features': 'Mapillary Map Features',
-             'mapillary-signs': 'Mapillary Signs',
-             openstreetcam: 'OpenStreetCam Images'
-           };
+         photos.showsFlat = function () {
+           return photos.showsPhotoType('flat');
+         };
 
-           for (var layerID in photoOverlayLayers) {
-             var layer = context.layers().layer(layerID);
+         photos.showsPanoramic = function () {
+           return photos.showsPhotoType('panoramic');
+         };
 
-             if (layer && layer.enabled()) {
-               photoOverlaysUsed.push(layerID);
-               imageryUsed.push(photoOverlayLayers[layerID]);
-             }
-           }
+         photos.fromDate = function () {
+           return _fromDate;
+         };
 
-           context.history().imageryUsed(imageryUsed);
-           context.history().photoOverlaysUsed(photoOverlaysUsed);
+         photos.toDate = function () {
+           return _toDate;
          };
 
-         var _checkedBlocklists;
+         photos.togglePhotoType = function (val) {
+           var index = _shownPhotoTypes.indexOf(val);
 
-         background.sources = function (extent, zoom, includeCurrent) {
-           if (!_imageryIndex) return []; // called before init()?
+           if (index !== -1) {
+             _shownPhotoTypes.splice(index, 1);
+           } else {
+             _shownPhotoTypes.push(val);
+           }
 
-           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();
+           dispatch.call('change', this);
+           return photos;
+         };
 
-           if (blocklists && blocklists !== _checkedBlocklists) {
-             _imageryIndex.backgrounds.forEach(function (source) {
-               source.isBlocked = blocklists.some(function (blocklist) {
-                 return blocklist.test(source.template());
-               });
-             });
+         photos.usernames = function () {
+           return _usernames;
+         };
+
+         photos.init = function () {
+           var hash = utilStringQs(window.location.hash);
 
-             _checkedBlocklists = blocklists;
+           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);
            }
 
-           return _imageryIndex.backgrounds.filter(function (source) {
-             if (includeCurrent && currSource === source) return true; // optionally always include the current imagery
+           if (hash.photo_username) {
+             this.setUsernameFilter(hash.photo_username, false);
+           }
 
-             if (source.isBlocked) return false; // even bundled sources may be blocked - #7905
+           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
 
-             if (!source.polygon) return true; // always include imagery with worldwide coverage
+               var layer = _layerIDs.indexOf(id) !== -1 && context.layers().layer(id);
+               if (layer && !layer.enabled()) layer.enabled(true);
+             });
+           }
 
-             if (zoom && zoom < 6) return false; // optionally exclude local imagery at low zooms
+           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);
 
-             return visible[source.id]; // include imagery visible in given extent
-           });
-         };
+             if (results && results.length >= 3) {
+               var serviceId = results[1];
+               if (serviceId === 'openstreetcam') serviceId = 'kartaview'; // legacy alias
 
-         background.dimensions = function (val) {
-           if (!val) return;
-           baseLayer.dimensions(val);
+               var photoKey = results[2];
+               var service = services[serviceId];
 
-           _overlayLayers.forEach(function (layer) {
-             return layer.dimensions(val);
-           });
-         };
+               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;
+                   }
 
-         background.baseLayerSource = function (d) {
-           if (!arguments.length) return baseLayer.source(); // test source against OSM imagery blocklists..
+                   if (!service.cachedImage(photoKey)) return;
+                   service.on('loadedImages.rendererPhotos', null);
+                   service.ensureViewerLoaded(context).then(function () {
+                     service.selectImage(context, photoKey).showViewer(context);
+                   });
+                 });
+               }
+             }
+           }
 
-           var osm = context.connection();
-           if (!osm) return background;
-           var blocklists = osm.imageryBlocklists();
-           var template = d.template();
-           var fail = false;
-           var tested = 0;
-           var regex;
+           context.layers().on('change.rendererPhotos', updateStorage);
+         };
 
-           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.
+         return utilRebind(photos, dispatch, 'on');
+       }
 
+       function uiAccount(context) {
+         var osm = context.connection();
 
-           if (!tested) {
-             regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
-             fail = regex.test(template);
+         function update(selection) {
+           if (!osm) return;
+
+           if (!osm.authenticated()) {
+             selection.selectAll('.userLink, .logoutLink').classed('hide', true);
+             return;
            }
 
-           baseLayer.source(!fail ? d : background.findSource('none'));
-           dispatch$1.call('change');
-           background.updateImagery();
-           return background;
-         };
+           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
 
-         background.findSource = function (id) {
-           if (!id || !_imageryIndex) return null; // called before init()?
+             var userLinkA = userLink.append('a').attr('href', osm.userURL(details.display_name)).attr('target', '_blank'); // Add thumbnail or dont
 
-           return _imageryIndex.backgrounds.find(function (d) {
-             return d.id && d.id === 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
 
-         background.bing = function () {
-           background.baseLayerSource(background.findSource('Bing'));
-         };
 
-         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;
+             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();
+             });
            });
+         }
+
+         return function (selection) {
+           selection.append('li').attr('class', 'userLink').classed('hide', true);
+           selection.append('li').attr('class', 'logoutLink').classed('hide', true);
+
+           if (osm) {
+             osm.on('change.account', function () {
+               update(selection);
+             });
+             update(selection);
+           }
          };
+       }
 
-         background.overlayLayerSources = function () {
-           return _overlayLayers.map(function (layer) {
-             return layer.source();
+       function uiAttribution(context) {
+         var _selection = select(null);
+
+         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]);
 
-         background.toggleOverlayLayer = function (d) {
-           var layer;
+             if (d.terms_html) {
+               attribution.html(d.terms_html);
+               return;
+             }
 
-           for (var i = 0; i < _overlayLayers.length; i++) {
-             layer = _overlayLayers[i];
+             if (d.terms_url) {
+               attribution = attribution.append('a').attr('href', d.terms_url).attr('target', '_blank');
+             }
 
-             if (layer.source() === d) {
-               _overlayLayers.splice(i, 1);
+             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()
+             });
 
-               dispatch$1.call('change');
-               background.updateImagery();
-               return;
+             if (d.icon && !d.overlay) {
+               attribution.append('img').attr('class', 'source-image').attr('src', d.icon);
              }
-           }
 
-           layer = rendererTileLayer(context).source(d).projection(context.projection).dimensions(baseLayer.dimensions());
+             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);
+         }
 
-           _overlayLayers.push(layer);
+         function update() {
+           var baselayer = context.background().baseLayerSource();
 
-           dispatch$1.call('change');
-           background.updateImagery();
-         };
+           _selection.call(render, baselayer ? [baselayer] : [], 'base-layer-attribution');
 
-         background.nudge = function (d, zoom) {
-           var currSource = baseLayer.source();
+           var z = context.map().zoom();
+           var overlays = context.background().overlayLayerSources() || [];
 
-           if (currSource) {
-             currSource.nudge(d, zoom);
-             dispatch$1.call('change');
-             background.updateImagery();
-           }
+           _selection.call(render, overlays.filter(function (s) {
+             return s.validZoom(z);
+           }), 'overlay-layer-attribution');
+         }
 
-           return background;
+         return function (selection) {
+           _selection = selection;
+           context.background().on('change.attribution', update);
+           context.map().on('move.attribution', throttle(update, 400, {
+             leading: false
+           }));
+           update();
          };
+       }
 
-         background.offset = function (d) {
-           var currSource = baseLayer.source();
+       function uiContributors(context) {
+         var osm = context.connection(),
+             debouncedUpdate = debounce(function () {
+           update();
+         }, 1000),
+             limit = 4,
+             hidden = false,
+             wrap = select(null);
 
-           if (!arguments.length) {
-             return currSource && currSource.offset() || [0, 0];
+         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);
+
+           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()
+               }
+             }));
+           } else {
+             wrap.append('span').html(_t.html('contributors.list', {
+               users: {
+                 html: userList.html()
+               }
+             }));
            }
 
-           if (currSource) {
-             currSource.offset(d);
-             dispatch$1.call('change');
-             background.updateImagery();
+           if (!u.length) {
+             hidden = true;
+             wrap.transition().style('opacity', 0);
+           } else if (hidden) {
+             wrap.transition().style('opacity', 1);
            }
+         }
 
-           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 (!osm) return;
+           wrap = selection;
+           update();
+           osm.on('loaded.contributors', debouncedUpdate);
+           context.map().on('move.contributors', debouncedUpdate);
          };
+       }
 
-         background.contrast = function (d) {
-           if (!arguments.length) return _contrast;
-           _contrast = d;
-           if (context.mode()) dispatch$1.call('change');
-           return background;
-         };
+       var _popoverID = 0;
+       function uiPopover(klass) {
+         var _id = _popoverID++;
 
-         background.saturation = function (d) {
-           if (!arguments.length) return _saturation;
-           _saturation = d;
-           if (context.mode()) dispatch$1.call('change');
-           return background;
-         };
+         var _anchorSelection = select(null);
 
-         background.sharpness = function (d) {
-           if (!arguments.length) return _sharpness;
-           _sharpness = d;
-           if (context.mode()) dispatch$1.call('change');
-           return background;
+         var popover = function popover(selection) {
+           _anchorSelection = selection;
+           selection.each(setup);
          };
 
-         var _loadPromise;
+         var _animation = utilFunctor(false);
 
-         background.ensureLoaded = function () {
-           if (_loadPromise) return _loadPromise;
+         var _placement = utilFunctor('top'); // top, bottom, left, right
 
-           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 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 _alignment = utilFunctor('center'); // leading, center, trailing
 
-             if (!requested && extent) {
-               best = background.sources(extent).find(function (s) {
-                 return s.best();
-               });
-             } // Decide which background layer to display
 
+         var _scrollContainer = utilFunctor(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'));
-             }
+         var _content;
 
-             var locator = imageryIndex.backgrounds.find(function (d) {
-               return d.overlay && d["default"];
-             });
+         var _displayType = utilFunctor('');
 
-             if (locator) {
-               background.toggleOverlayLayer(locator);
-             }
+         var _hasArrow = utilFunctor(true); // use pointer events on supported platforms; fallback to mouse events
 
-             var overlays = (hash.overlays || '').split(',');
-             overlays.forEach(function (overlay) {
-               overlay = background.findSource(overlay);
 
-               if (overlay) {
-                 background.toggleOverlayLayer(overlay);
-               }
-             });
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-             if (hash.gpx) {
-               var gpx = context.layers().layer('data');
+         popover.displayType = function (val) {
+           if (arguments.length) {
+             _displayType = utilFunctor(val);
+             return popover;
+           } else {
+             return _displayType;
+           }
+         };
 
-               if (gpx) {
-                 gpx.url(hash.gpx, '.gpx');
-               }
-             }
+         popover.hasArrow = function (val) {
+           if (arguments.length) {
+             _hasArrow = utilFunctor(val);
+             return popover;
+           } else {
+             return _hasArrow;
+           }
+         };
 
-             if (hash.offset) {
-               var offset = hash.offset.replace(/;/g, ',').split(',').map(function (n) {
-                 return !isNaN(n) && n;
-               });
+         popover.placement = function (val) {
+           if (arguments.length) {
+             _placement = utilFunctor(val);
+             return popover;
+           } else {
+             return _placement;
+           }
+         };
 
-               if (offset.length === 2) {
-                 background.offset(geoMetersToOffset(offset));
-               }
-             }
-           })["catch"](function () {
-             /* ignore */
-           });
+         popover.alignment = function (val) {
+           if (arguments.length) {
+             _alignment = utilFunctor(val);
+             return popover;
+           } else {
+             return _alignment;
+           }
          };
 
-         return utilRebind(background, dispatch$1, 'on');
-       }
+         popover.scrollContainer = function (val) {
+           if (arguments.length) {
+             _scrollContainer = utilFunctor(val);
+             return popover;
+           } else {
+             return _scrollContainer;
+           }
+         };
 
-       function rendererFeatures(context) {
-         var dispatch$1 = dispatch('change', 'redraw');
-         var features = utilRebind({}, dispatch$1, 'on');
+         popover.content = function (val) {
+           if (arguments.length) {
+             _content = val;
+             return popover;
+           } else {
+             return _content;
+           }
+         };
 
-         var _deferred = new Set();
+         popover.isShown = function () {
+           var popoverSelection = _anchorSelection.select('.popover-' + _id);
 
-         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
+           return !popoverSelection.empty() && popoverSelection.classed('in');
          };
-         var past_futures = {
-           'proposed': true,
-           'construction': true,
-           'abandoned': true,
-           'dismantled': true,
-           'disused': true,
-           'razed': true,
-           'demolished': true,
-           'obliterated': true
+
+         popover.show = function () {
+           _anchorSelection.each(show);
          };
-         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();
+         popover.updateContent = function () {
+           _anchorSelection.each(updateContent);
+         };
 
-             if (disabled.length) {
-               hash.disable_features = disabled.join(',');
-             } else {
-               delete hash.disable_features;
-             }
+         popover.hide = function () {
+           _anchorSelection.each(hide);
+         };
 
-             window.location.replace('#' + utilQsString(hash, true));
-             corePreferences('disabled-features', disabled.join(','));
-           }
+         popover.toggle = function () {
+           _anchorSelection.each(toggle);
+         };
 
-           _hidden = features.hidden();
-           dispatch$1.call('change');
-           dispatch$1.call('redraw');
-         }
+         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();
+         };
 
-         function defineRule(k, filter, max) {
-           var isEnabled = true;
+         popover.destroyAny = function (selection) {
+           selection.call(popover.destroy, '.popover');
+         };
 
-           _keys.push(k);
+         function setup() {
+           var anchor = select(this);
 
-           _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 animate = _animation.apply(this, arguments);
 
-         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..
+           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);
 
-         defineRule('past_future', function isPastFuture(tags) {
-           if (traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]) {
-             return false;
+           if (animate) {
+             popoverSelection.classed('fade', true);
            }
 
-           var strings = Object.keys(tags);
-
-           for (var i = 0; i < strings.length; i++) {
-             var s = strings[i];
-
-             if (past_futures[s] || past_futures[tags[s]]) {
-               return true;
-             }
-           }
+           var display = _displayType.apply(this, arguments);
 
-           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 (display === 'hover') {
+             var _lastNonMouseEnterTime;
 
-         defineRule('others', function isOther(tags, geometry) {
-           return geometry === 'line' || geometry === 'area';
-         });
+             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
 
-         features.features = function () {
-           return _rules;
-         };
+                   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
 
-         features.keys = function () {
-           return _keys;
-         };
 
-         features.enabled = function (k) {
-           if (!arguments.length) {
-             return _keys.filter(function (k) {
-               return _rules[k].enabled;
+               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);
              });
-           }
-
-           return _rules[k] && _rules[k].enabled;
-         };
-
-         features.disabled = function (k) {
-           if (!arguments.length) {
-             return _keys.filter(function (k) {
-               return !_rules[k].enabled;
+           } 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);
+               });
              });
            }
+         }
 
-           return _rules[k] && !_rules[k].enabled;
-         };
+         function show() {
+           var anchor = select(this);
+           var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-         features.hidden = function (k) {
-           if (!arguments.length) {
-             return _keys.filter(function (k) {
-               return _rules[k].hidden();
-             });
+           if (popoverSelection.empty()) {
+             // popover was removed somehow, put it back
+             anchor.call(popover.destroy);
+             anchor.each(setup);
+             popoverSelection = anchor.selectAll('.popover-' + _id);
            }
 
-           return _rules[k] && _rules[k].hidden();
-         };
+           popoverSelection.classed('in', true);
 
-         features.autoHidden = function (k) {
-           if (!arguments.length) {
-             return _keys.filter(function (k) {
-               return _rules[k].autoHidden();
-             });
+           var displayType = _displayType.apply(this, arguments);
+
+           if (displayType === 'clickFocus') {
+             anchor.classed('active', true);
+             popoverSelection.node().focus();
            }
 
-           return _rules[k] && _rules[k].autoHidden();
-         };
+           anchor.each(updateContent);
+         }
 
-         features.enable = function (k) {
-           if (_rules[k] && !_rules[k].enabled) {
-             _rules[k].enable();
+         function updateContent() {
+           var anchor = select(this);
 
-             update();
+           if (_content) {
+             anchor.selectAll('.popover-' + _id + ' > .popover-inner').call(_content.apply(this, arguments));
            }
-         };
 
-         features.enableAll = function () {
-           var didEnable = false;
+           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
 
-           for (var k in _rules) {
-             if (!_rules[k].enabled) {
-               didEnable = true;
+           updatePosition.apply(this, arguments);
+           updatePosition.apply(this, arguments);
+         }
 
-               _rules[k].enable();
-             }
-           }
+         function updatePosition() {
+           var anchor = select(this);
+           var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-           if (didEnable) update();
-         };
+           var scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);
 
-         features.disable = function (k) {
-           if (_rules[k] && _rules[k].enabled) {
-             _rules[k].disable();
+           var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
+           var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
+           var scrollTop = scrollNode ? scrollNode.scrollTop : 0;
 
-             update();
-           }
-         };
+           var placement = _placement.apply(this, arguments);
 
-         features.disableAll = function () {
-           var didDisable = false;
+           popoverSelection.classed('left', false).classed('right', false).classed('top', false).classed('bottom', false).classed(placement, true);
 
-           for (var k in _rules) {
-             if (_rules[k].enabled) {
-               didDisable = true;
+           var alignment = _alignment.apply(this, arguments);
 
-               _rules[k].disable();
-             }
+           var alignFactor = 0.5;
+
+           if (alignment === 'leading') {
+             alignFactor = 0;
+           } else if (alignment === 'trailing') {
+             alignFactor = 1;
            }
 
-           if (didDisable) update();
-         };
+           var anchorFrame = getFrame(anchor.node());
+           var popoverFrame = getFrame(popoverSelection.node());
+           var position;
 
-         features.toggle = function (k) {
-           if (_rules[k]) {
-             (function (f) {
-               return f.enabled ? f.disable() : f.enable();
-             })(_rules[k]);
+           switch (placement) {
+             case 'top':
+               position = {
+                 x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+                 y: anchorFrame.y - popoverFrame.h
+               };
+               break;
 
-             update();
-           }
-         };
+             case 'bottom':
+               position = {
+                 x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+                 y: anchorFrame.y + anchorFrame.h
+               };
+               break;
 
-         features.resetStats = function () {
-           for (var i = 0; i < _keys.length; i++) {
-             _rules[_keys[i]].count = 0;
+             case 'left':
+               position = {
+                 x: anchorFrame.x - popoverFrame.w,
+                 y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+               };
+               break;
+
+             case 'right':
+               position = {
+                 x: anchorFrame.x + anchorFrame.w,
+                 y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+               };
+               break;
            }
 
-           dispatch$1.call('change');
-         };
+           if (position) {
+             if (scrollNode && (placement === 'top' || placement === 'bottom')) {
+               var initialPosX = position.x;
 
-         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 (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
+                 position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
+               } else if (position.x < 10) {
+                 position.x = 10;
+               }
 
-           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..
+               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');
+             }
 
-           _cullFactor = dimensions[0] * dimensions[1] / 1000000;
+             popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
+           } else {
+             popoverSelection.style('left', null).style('top', null);
+           }
 
-           for (i = 0; i < entities.length; i++) {
-             geometry = entities[i].geometry(resolver);
-             matches = Object.keys(features.getMatches(entities[i], resolver, geometry));
+           function getFrame(node) {
+             var positionStyle = select(node).style('position');
 
-             for (j = 0; j < matches.length; j++) {
-               _rules[matches[j]].count++;
+             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
+               };
              }
            }
+         }
 
-           currHidden = features.hidden();
+         function hide() {
+           var anchor = select(this);
 
-           if (currHidden !== _hidden) {
-             _hidden = currHidden;
-             needsRedraw = true;
-             dispatch$1.call('change');
+           if (_displayType.apply(this, arguments) === 'clickFocus') {
+             anchor.classed('active', false);
            }
 
-           return needsRedraw;
-         };
+           anchor.selectAll('.popover-' + _id).classed('in', false);
+         }
 
-         features.stats = function () {
-           for (var i = 0; i < _keys.length; i++) {
-             _stats[_keys[i]] = _rules[_keys[i]].count;
+         function toggle() {
+           if (select(this).select('.popover-' + _id).classed('in')) {
+             hide.apply(this, arguments);
+           } else {
+             show.apply(this, arguments);
            }
+         }
 
-           return _stats;
-         };
+         return popover;
+       }
 
-         features.clear = function (d) {
-           for (var i = 0; i < d.length; i++) {
-             features.clearEntity(d[i]);
+       function uiTooltip(klass) {
+         var tooltip = uiPopover((klass || '') + ' tooltip').displayType('hover');
+
+         var _title = function _title() {
+           var title = this.getAttribute('data-original-title');
+
+           if (title) {
+             return title;
+           } else {
+             title = this.getAttribute('title');
+             this.removeAttribute('title');
+             this.setAttribute('data-original-title', title);
            }
-         };
 
-         features.clearEntity = function (entity) {
-           delete _cache[osmEntity.key(entity)];
+           return title;
          };
 
-         features.reset = function () {
-           Array.from(_deferred).forEach(function (handle) {
-             window.cancelIdleCallback(handle);
-
-             _deferred["delete"](handle);
-           });
-           _cache = {};
-         }; // only certain relations are worth checking
+         var _heading = utilFunctor(null);
 
+         var _keys = utilFunctor(null);
 
-         function relationShouldBeChecked(relation) {
-           // multipolygon features have `area` geometry and aren't checked here
-           return relation.tags.type === 'boundary';
-         }
+         tooltip.title = function (val) {
+           if (!arguments.length) return _title;
+           _title = utilFunctor(val);
+           return tooltip;
+         };
 
-         features.getMatches = function (entity, resolver, geometry) {
-           if (geometry === 'vertex' || geometry === 'relation' && !relationShouldBeChecked(entity)) return {};
-           var ent = osmEntity.key(entity);
+         tooltip.heading = function (val) {
+           if (!arguments.length) return _heading;
+           _heading = utilFunctor(val);
+           return tooltip;
+         };
 
-           if (!_cache[ent]) {
-             _cache[ent] = {};
-           }
+         tooltip.keys = function (val) {
+           if (!arguments.length) return _keys;
+           _keys = utilFunctor(val);
+           return tooltip;
+         };
 
-           if (!_cache[ent].matches) {
-             var matches = {};
-             var hasMatch = false;
+         tooltip.content(function () {
+           var heading = _heading.apply(this, arguments);
 
-             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,
+           var text = _title.apply(this, arguments);
 
-                 if (entity.type === 'way') {
-                   var parents = features.getParents(entity, resolver, geometry); //   2a. belongs only to a single multipolygon relation
+           var keys = _keys.apply(this, arguments);
 
-                   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 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;
+       }
 
-                     if (_cache[pkey] && _cache[pkey].matches) {
-                       matches = Object.assign({}, _cache[pkey].matches); // shallow copy
+       function uiEditMenu(context) {
+         var dispatch = dispatch$8('toggled');
 
-                       continue;
-                     }
-                   }
-                 }
-               }
+         var _menu = select(null);
 
-               if (_rules[_keys[i]].filter(entity.tags, geometry)) {
-                 matches[_keys[i]] = hasMatch = true;
-               }
-             }
+         var _operations = []; // the position the menu should be displayed relative to
 
-             _cache[ent].matches = matches;
-           }
+         var _anchorLoc = [0, 0];
+         var _anchorLocLonLat = [0, 0]; // a string indicating how the menu was opened
 
-           return _cache[ent].matches;
-         };
+         var _triggerType = '';
+         var _vpTopMargin = 85; // viewport top margin
 
-         features.getParents = function (entity, resolver, geometry) {
-           if (geometry === 'point') return [];
-           var ent = osmEntity.key(entity);
+         var _vpBottomMargin = 45; // viewport bottom margin
 
-           if (!_cache[ent]) {
-             _cache[ent] = {};
-           }
+         var _vpSideMargin = 35; // viewport side margin
 
-           if (!_cache[ent].parents) {
-             var parents = [];
+         var _menuTop = false;
 
-             if (geometry === 'vertex') {
-               parents = resolver.parentWays(entity);
-             } else {
-               // 'line', 'area', 'relation'
-               parents = resolver.parentRelations(entity);
-             }
+         var _menuHeight;
 
-             _cache[ent].parents = parents;
-           }
+         var _menuWidth; // hardcode these values to make menu positioning easier
 
-           return _cache[ent].parents;
-         };
 
-         features.isHiddenPreset = function (preset, geometry) {
-           if (!_hidden.length) return false;
-           if (!preset.tags) return false;
-           var test = preset.setTags({}, geometry);
+         var _verticalPadding = 4; // see also `.edit-menu .tooltip` CSS; include margin
 
-           for (var key in _rules) {
-             if (_rules[key].filter(test, geometry)) {
-               if (_hidden.indexOf(key) !== -1) {
-                 return key;
-               }
+         var _tooltipWidth = 210; // offset the menu slightly from the target location
 
-               return false;
-             }
-           }
+         var _menuSideMargin = 10;
+         var _tooltips = [];
 
-           return false;
-         };
+         var editMenu = function editMenu(selection) {
+           var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');
 
-         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);
+           var ops = _operations.filter(function (op) {
+             return !isTouchMenu || !op.mouseOnly;
            });
-         };
-
-         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;
 
-           for (var i = 0; i < parents.length; i++) {
-             if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
-               return false;
-             }
-           }
+           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
 
-           return true;
-         };
+           _menuTop = isTouchMenu; // Show labels for touch input since there aren't hover tooltips
 
-         features.hasHiddenConnections = function (entity, resolver) {
-           if (!_hidden.length) return false;
-           var childNodes, connections;
+           var showLabels = isTouchMenu;
+           var buttonHeight = showLabels ? 32 : 34;
 
-           if (entity.type === 'midpoint') {
-             childNodes = [resolver.entity(entity.edge[0]), resolver.entity(entity.edge[1])];
-             connections = [];
+           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 {
-             childNodes = entity.nodes ? resolver.childNodes(entity) : [];
-             connections = features.getParents(entity, resolver, entity.geometry(resolver));
-           } // gather ways connected to child nodes..
-
+             _menuWidth = 44;
+           }
 
-           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));
-           });
-         };
+           _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
+           _menu = selection.append('div').attr('class', 'edit-menu').classed('touch-menu', isTouchMenu).style('padding', _verticalPadding + 'px 0');
 
-         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);
-         };
+           var buttons = _menu.selectAll('.edit-menu-item').data(ops); // enter
 
-         features.filter = function (d, resolver) {
-           if (!_hidden.length) return d;
-           var result = [];
 
-           for (var i = 0; i < d.length; i++) {
-             var entity = d[i];
+           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]]);
 
-             if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
-               result.push(entity);
-             }
-           }
+             _tooltips.push(tooltip);
 
-           return result;
-         };
+             select(this).call(tooltip).append('div').attr('class', 'icon-wrap').call(svgIcon(d.icon && d.icon() || '#iD-operation-' + d.id, 'operation'));
+           });
 
-         features.forceVisible = function (entityIDs) {
-           if (!arguments.length) return Object.keys(_forceVisible);
-           _forceVisible = {};
+           if (showLabels) {
+             buttonsEnter.append('span').attr('class', 'label').html(function (d) {
+               return d.title;
+             });
+           } // update
 
-           for (var i = 0; i < entityIDs.length; i++) {
-             _forceVisible[entityIDs[i]] = true;
-             var entity = context.hasEntity(entityIDs[i]);
 
-             if (entity && entity.type === 'relation') {
-               // also show relation members (one level deep)
-               for (var j in entity.members) {
-                 _forceVisible[entity.members[j].id] = true;
-               }
+           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();
              }
-           }
-
-           return features;
-         };
-
-         features.init = function () {
-           var storage = corePreferences('disabled-features');
-
-           if (storage) {
-             var storageDisabled = storage.replace(/;/g, ',').split(',');
-             storageDisabled.forEach(features.disable);
-           }
-
-           var hash = utilStringQs(window.location.hash);
+           }).on('drawn.edit-menu', function (info) {
+             if (info.full) updatePosition();
+           });
+           var lastPointerUpType; // `pointerup` is always called before `click`
 
-           if (hash.disable_features) {
-             var hashDisabled = hash.disable_features.replace(/;/g, ',').split(',');
-             hashDisabled.forEach(features.disable);
+           function pointerup(d3_event) {
+             lastPointerUpType = d3_event.pointerType;
            }
-         }; // warm up the feature matching cache upon merging fetched data
-
-
-         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 entities = [].concat(types.relation || [], types.way || [], types.node || []);
+           function click(d3_event, operation) {
+             d3_event.stopPropagation();
 
-             for (var i = 0; i < entities.length; i++) {
-               var geometry = entities[i].geometry(graph);
-               features.getMatches(entities[i], graph, geometry);
+             if (operation.relatedEntityIds) {
+               utilHighlightEntities(operation.relatedEntityIds(), false, context);
              }
-           });
-
-           _deferred.add(handle);
-         });
-         return features;
-       }
 
-       //
-       // - 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 (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)();
+               }
 
-       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;
+               operation();
+               editMenu.close();
+             }
 
-         for (i = 0; i < parents.length; i++) {
-           nodes = parents[i].nodes;
-           isClosed = parents[i].isClosed();
+             lastPointerUpType = 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;
+           dispatch.call('toggled', this, true);
+         };
 
-               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;
-               }
+         function updatePosition() {
+           if (!_menu || _menu.empty()) return;
+           var anchorLoc = context.projection(_anchorLocLonLat);
+           var viewport = context.surfaceRect();
 
-               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 (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;
            }
-         }
 
-         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;
+           var menuLeft = displayOnLeft(viewport);
+           var offset = [0, 0];
+           offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;
 
-           if (shouldReverse(entity)) {
-             coordinates.reverse();
+           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 {
+             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;
+             }
            }
 
-           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];
+           var origin = geoVecAdd(anchorLoc, offset);
 
-               if (a) {
-                 var span = geoVecLength(a, b) - offset;
+           _menu.style('left', origin[0] + 'px').style('top', origin[1] + 'px');
 
-                 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 tooltipSide = tooltipPosition(viewport, menuLeft);
 
-                   var coord = [a, p];
+           _tooltips.forEach(function (tooltip) {
+             tooltip.placement(tooltipSide);
+           });
 
-                   for (span -= dt; span >= 0; span -= dt) {
-                     p = geoVecAdd(p, [dx, dy]);
-                     coord.push(p);
-                   }
+           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
 
-                   coord.push(b); // generate svg paths
 
-                   var segment = '';
-                   var j;
+               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 (j = 0; j < coord.length; j++) {
-                     segment += (j === 0 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
-                   }
 
-                   segments.push({
-                     id: entity.id,
-                     index: i++,
-                     d: segment
-                   });
+               return true;
+             }
+           }
 
-                   if (bothDirections(entity)) {
-                     segment = '';
+           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';
+               }
 
-                     for (j = coord.length - 1; j >= 0; j--) {
-                       segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
-                     }
+               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
 
-                     segments.push({
-                       id: entity.id,
-                       index: i++,
-                       d: segment
-                     });
-                   }
-                 }
 
-                 offset = -span;
+               return 'right';
+             } else {
+               // rtl
+               if (!menuLeft) {
+                 return 'right';
                }
 
-               a = b;
+               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';
              }
-           })));
-           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));
            }
-         });
+         }
 
-         var svgpath = function svgpath(entity) {
-           if (entity.id in cache) {
-             return cache[entity.id];
-           } else {
-             return cache[entity.id] = path(entity.asGeoJSON(graph));
-           }
+         editMenu.close = function () {
+           context.map().on('move.edit-menu', null).on('drawn.edit-menu', null);
+
+           _menu.remove();
+
+           _tooltips = [];
+           dispatch.call('toggled', this, false);
          };
 
-         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);
-           }
+         editMenu.anchorLoc = function (val) {
+           if (!arguments.length) return _anchorLoc;
+           _anchorLoc = val;
+           _anchorLocLonLat = context.projection.invert(_anchorLoc);
+           return editMenu;
          };
 
-         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] + ')';
+         editMenu.triggerType = function (val) {
+           if (!arguments.length) return _triggerType;
+           _triggerType = val;
+           return editMenu;
          };
 
-         svgpoint.geojson = function (d) {
-           return svgpoint(d.properties.entity);
+         editMenu.operations = function (val) {
+           if (!arguments.length) return _operations;
+           _operations = val;
+           return editMenu;
          };
 
-         return svgpoint;
+         return utilRebind(editMenu, dispatch, 'on');
        }
-       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);
+       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]
+               });
              }
+
+             return null;
+           }).filter(Boolean);
+           selection.html('');
+
+           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
+
+               context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
+             });
+           }
+
+           selection.classed('hide', !hiddenList.length);
+         }
+
+         return function (selection) {
+           update(selection);
+           context.features().on('change.feature_info', function () {
+             update(selection);
            });
-           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();
-         }
-
-         function getWaySegments() {
-           var isActiveWay = way.nodes.indexOf(activeID) !== -1;
-           var features = {
-             passive: [],
-             active: []
-           };
-           var start = {};
-           var end = {};
-           var node, type;
 
-           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
-             };
+       function uiFlash(context) {
+         var _flashTimer;
 
-             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);
-               }
-             }
+         var _duration = 2000;
+         var _iconName = '#iD-icon-no';
+         var _iconClass = 'disabled';
+         var _label = '';
 
-             start = end;
+         function flash() {
+           if (_flashTimer) {
+             _flashTimer.stop();
            }
 
-           return features;
+           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
 
-           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 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
 
-           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]
-               }
-             });
-           }
+           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;
          }
-       }
 
-       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'];
+         flash.duration = function (_) {
+           if (!arguments.length) return _duration;
+           _duration = _;
+           return flash;
+         };
 
-         var _tags = function _tags(entity) {
-           return entity.tags;
+         flash.label = function (_) {
+           if (!arguments.length) return _label;
+           _label = _;
+           return flash;
          };
 
-         var tagClasses = function tagClasses(selection) {
-           selection.each(function tagClassesEach(entity) {
-             var value = this.className;
+         flash.iconName = function (_) {
+           if (!arguments.length) return _iconName;
+           _iconName = _;
+           return flash;
+         };
 
-             if (value.baseVal !== undefined) {
-               value = value.baseVal;
-             }
+         flash.iconClass = function (_) {
+           if (!arguments.length) return _iconClass;
+           _iconClass = _;
+           return flash;
+         };
 
-             var t = _tags(entity);
+         return flash;
+       }
 
-             var computed = tagClasses.getClassesString(t, value);
+       function uiFullScreen(context) {
+         var element = context.container().node(); // var button = d3_select(null);
 
-             if (computed !== value) {
-               select(this).attr('class', computed);
-             }
-           });
-         };
+         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;
+           }
+         }
 
-         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 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;
+           }
+         }
 
-           var overrideGeometry;
+         function isFullScreen() {
+           return document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement;
+         }
 
-           if (/\bstroke\b/.test(value)) {
-             if (!!t.barrier && t.barrier !== 'no') {
-               overrideGeometry = 'line';
-             }
-           } // preserve base classes (nothing with `tag-`)
+         function isSupported() {
+           return !!getFullScreenFn();
+         }
 
+         function fullScreen(d3_event) {
+           d3_event.preventDefault();
 
-           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..
+           if (!isFullScreen()) {
+             // button.classed('active', true);
+             getFullScreenFn().apply(element);
+           } else {
+             // button.classed('active', false);
+             getExitFullScreenFn().apply(document);
+           }
+         }
 
-           for (i = 0; i < primaries.length; i++) {
-             k = primaries[i];
-             v = t[k];
-             if (!v || v === 'no') continue;
+         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');
 
-             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 detected = utilDetect();
+           var keys = detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11'];
+           context.keybinding().on(keys, fullScreen);
+         };
+       }
 
-             primary = k;
+       function uiGeolocate(context) {
+         var _geolocationOptions = {
+           // prioritize speed and power usage over precision
+           enableHighAccuracy: false,
+           // don't hang indefinitely getting the location
+           timeout: 6000 // 6sec
 
-             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 _locating = uiLoading(context).message(_t.html('geolocate.locating')).blocking(true);
 
-           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`
+         var _layer = context.layers().layer('geolocate');
 
-                 v = t[k];
-                 if (!v || v === 'no') continue;
-                 status = statuses[i];
-                 break;
-               }
-             }
-           } // add at most one status tag, only if relates to primary tag..
+         var _position;
 
+         var _extent;
 
-           if (!status) {
-             for (i = 0; i < statuses.length; i++) {
-               k = statuses[i];
-               v = t[k];
-               if (!v || v === 'no') continue;
+         var _timeoutID;
 
-               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 _button = select(null);
 
+         function click() {
+           if (context.inIntro()) return;
 
-               if (status) break;
-             }
+           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
+
+             navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
+           } else {
+             _locating.close();
+
+             _layer.enabled(null, false);
+
+             updateButtonState();
            }
+         }
 
-           if (status) {
-             classes.push('tag-status');
-             classes.push('tag-status-' + status);
-           } // add any secondary tags
+         function zoomTo() {
+           context.enter(modeBrowse(context));
+           var map = context.map();
 
+           _layer.enabled(_position, true);
 
-           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..
+           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();
+         }
 
-           if (primary === 'highway' && !osmPathHighwayTagValues[t.highway] || primary === 'aeroway') {
-             var surface = t.highway === 'track' ? 'unpaved' : 'paved';
+         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')();
+           }
 
-             for (k in t) {
-               v = t[k];
+           finish();
+         }
 
-               if (k in osmPavedTags) {
-                 surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
-               }
+         function finish() {
+           _locating.close(); // unblock ui
 
-               if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
-                 surface = 'semipaved';
-               }
-             }
 
-             classes.push('tag-' + surface);
-           } // If this is a wikidata-tagged item, add a class for that..
+           if (_timeoutID) {
+             clearTimeout(_timeoutID);
+           }
 
+           _timeoutID = undefined;
+         }
 
-           if (t.wikidata || t['brand:wikidata']) {
-             classes.push('tag-wikidata');
-           }
+         function updateButtonState() {
+           _button.classed('active', _layer.enabled());
 
-           return classes.join(' ').trim();
-         };
+           _button.attr('aria-pressed', _layer.enabled());
+         }
 
-         tagClasses.tags = function (val) {
-           if (!arguments.length) return _tags;
-           _tags = val;
-           return tagClasses;
+         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);
          };
-
-         return tagClasses;
        }
 
-       // 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;
-         }
+       function uiPanelBackground(context) {
+         var background = context.background();
+         var _currSourceName = null;
+         var _metadata = {};
+         var _metadataKeys = ['zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'];
 
-         for (var tag in patterns) {
-           var entityValue = tags[tag];
-           if (!entityValue) continue;
+         var debouncedRedraw = debounce(redraw, 250);
 
-           if (typeof patterns[tag] === 'string') {
-             // extra short syntax (just tag) - pattern name
-             return 'pattern-' + patterns[tag];
-           } else {
-             var values = patterns[tag];
+         function redraw(selection) {
+           var source = background.baseLayerSource();
+           if (!source) return;
+           var isDG = source.id.match(/^DigitalGlobe/i) !== null;
+           var sourceLabel = source.label();
 
-             for (var value in values) {
-               if (entityValue !== value) continue;
-               var rules = values[value];
+           if (_currSourceName !== sourceLabel) {
+             _currSourceName = sourceLabel;
+             _metadata = {};
+           }
 
-               if (typeof rules === 'string') {
-                 // short syntax - pattern name
-                 return 'pattern-' + rules;
-               } // long syntax - rule array
+           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]).call(_t.append('info_panels.background.' + k, {
+               suffix: ':'
+             })).append('span').attr('class', 'background-info-span-' + k).text(_metadata[k]);
+           });
 
-               for (var ruleKey in rules) {
-                 var rule = rules[ruleKey];
-                 var pass = 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);
+           });
 
-                 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];
+           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
 
-                     if (!v || v !== rule[criterion]) {
-                       pass = false;
-                       break;
-                     }
-                   }
-                 }
 
-                 if (pass) {
-                   return 'pattern-' + rule.pattern;
-                 }
+           ['DigitalGlobe-Premium', 'DigitalGlobe-Standard'].forEach(function (layerId) {
+             if (source.id !== layerId) {
+               var key = layerId + '-vintage';
+               var sourceVintage = context.background().findSource(key);
+
+               if (context.background().showsLayer(sourceVintage)) {
+                 context.background().toggleOverlayLayer(sourceVintage);
                }
              }
-           }
+           });
          }
 
-         return null;
-       }
+         var debouncedGetMetadata = debounce(getMetadata, 250);
 
-       function svgAreas(projection, context) {
-         function getPatternStyle(tags) {
-           var imageID = svgTagPattern(tags);
+         function getMetadata(selection) {
+           var tile = context.container().select('.layer-background img.tile-center'); // tile near viewport center
 
-           if (imageID) {
-             return 'url("#ideditor-' + imageID + '")';
-           }
+           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 '';
-         }
+           _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
 
-         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 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
 
-           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
+             _metadataKeys.forEach(function (k) {
+               if (k === 'zoom' || k === 'vintage') return; // done already
 
-           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 val = result[k];
+               _metadata[k] = val;
+               selection.selectAll('.background-info-list-' + k).classed('hide', !val).selectAll('.background-info-span-' + k).text(val);
+             });
+           });
+         }
 
-           targets.exit().remove();
+         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 segmentWasEdited = function segmentWasEdited(d) {
-             var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
+         panel.off = function () {
+           context.map().on('drawn.info-background', null).on('move.info-background', null);
+         };
 
-             if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
-               return false;
-             }
+         panel.id = 'background';
+         panel.label = _t.html('info_panels.background.title');
+         panel.key = _t('info_panels.background.key');
+         return panel;
+       }
 
-             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
+       function uiPanelHistory(context) {
+         var osm;
 
+         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);
+         }
 
-           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
+         function displayUser(selection, userName) {
+           if (!userName) {
+             selection.append('span').call(_t.append('info_panels.history.unknown'));
+             return;
+           }
 
-           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
+           selection.append('span').attr('class', 'user-name').text(userName);
+           var links = selection.append('div').attr('class', 'links');
 
-           nopes.exit().remove(); // enter/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'));
+           }
 
-           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);
+           links.append('a').attr('class', 'user-hdyc-link').attr('href', 'https://hdyc.neis-one.org/?' + userName).attr('target', '_blank').attr('tabindex', -1).text('HDYC');
          }
 
-         function drawAreas(selection, graph, entities, filter) {
-           var path = svgPath(projection, graph, true);
-           var areas = {};
-           var multipolygon;
-           var base = context.history().base();
+         function displayChangeset(selection, changeset) {
+           if (!changeset) {
+             selection.append('span').call(_t.append('info_panels.history.unknown'));
+             return;
+           }
 
-           for (var i = 0; i < entities.length; i++) {
-             var entity = entities[i];
-             if (entity.geometry(graph) !== 'area') continue;
-             multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
+           selection.append('span').attr('class', 'changeset-id').text(changeset);
+           var links = selection.append('div').attr('class', 'links');
 
-             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 (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'));
            }
 
-           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..
-
-           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;
+           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');
+         }
 
-           function sortedByArea(entity) {
-             if (this._parent.__data__ === 'fill') {
-               return fillpaths[bisect(fillpaths, -entity.area(graph))];
-             }
-           }
+         function redraw(selection) {
+           var selectedNoteID = context.selectedNoteID();
+           osm = context.connection();
+           var selected, note, entity;
 
-           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 (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);
+             });
 
-             if (layer === 'fill') {
-               this.setAttribute('clip-path', 'url(#ideditor-' + entity.id + '-clippath)');
-               this.style.fill = this.style.stroke = getPatternStyle(entity.tags);
+             if (selected.length) {
+               entity = context.entity(selected[0]);
              }
-           }).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..
+           }
 
-           touchLayer.call(drawTargets, graph, data.stroke, filter);
-         }
+           var singular = selected.length === 1 ? selected[0] : null;
+           selection.html('');
 
-         return drawAreas;
-       }
+           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
+             }));
+           }
 
-       //[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 (!singular) return;
 
-       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
+           if (entity) {
+             selection.call(redrawEntity, entity);
+           } else if (note) {
+             selection.call(redrawNote, note);
+           }
+         }
 
-       var S_TAG = 0; //tag name offerring
+         function redrawNote(selection, note) {
+           if (!note || note.isNew()) {
+             selection.append('div').call(_t.append('info_panels.history.note_no_history'));
+             return;
+           }
 
-       var S_ATTR = 1; //attr name offerring 
+           var list = selection.append('ul');
+           list.append('li').call(_t.append('info_panels.history.note_comments', {
+             suffix: ':'
+           })).append('span').text(note.comments.length);
 
-       var S_ATTR_SPACE = 2; //attr name end and space offer
+           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);
+           }
 
-       var S_EQ = 3; //=space?
+           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'));
+           }
+         }
 
-       var S_ATTR_NOQUOT_VALUE = 4; //attr value(no quot value only)
+         function redrawEntity(selection, entity) {
+           if (!entity || entity.isNew()) {
+             selection.append('div').call(_t.append('info_panels.history.no_history'));
+             return;
+           }
 
-       var S_ATTR_END = 5; //attr value end and no space(quot end)
+           var links = selection.append('div').attr('class', 'links');
 
-       var S_TAG_SPACE = 6; //(attr value end || tag end ) && (space offer)
+           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'));
+           }
 
-       var S_TAG_CLOSE = 7; //closed el<el />
+           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);
+         }
 
-       function XMLReader() {}
+         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);
+           });
+         };
 
-       XMLReader.prototype = {
-         parse: function parse(source, defaultNSMap, entityMap) {
-           var domBuilder = this.domBuilder;
-           domBuilder.startDocument();
+         panel.off = function () {
+           context.map().on('drawn.info-history', null);
+           context.on('enter.info-history', null);
+         };
 
-           _copy(defaultNSMap, defaultNSMap = {});
+         panel.id = 'history';
+         panel.label = _t.html('info_panels.history.title');
+         panel.key = _t('info_panels.history.key');
+         return panel;
+       }
 
-           _parse(source, defaultNSMap, entityMap, domBuilder, this.errorHandler);
+       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
+        */
 
-           domBuilder.endDocument();
-         }
-       };
+       function displayLength(m, isImperial) {
+         var d = m * (isImperial ? 3.28084 : 1);
+         var unit;
 
-       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);
+         if (isImperial) {
+           if (d >= 5280) {
+             d /= 5280;
+             unit = 'miles';
+           } else {
+             unit = 'feet';
+           }
+         } else {
+           if (d >= 1000) {
+             d /= 1000;
+             unit = 'kilometers';
            } else {
-             return String.fromCharCode(code);
+             unit = 'meters';
            }
          }
 
-         function entityReplacer(a) {
-           var k = a.slice(1, -1);
+         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 = '';
 
-           if (k in entityMap) {
-             return entityMap[k];
-           } else if (k.charAt(0) === '#') {
-             return fixedFromCharCode(parseInt(k.substr(1).replace('x', '0x')));
+         if (isImperial) {
+           if (d >= 6969600) {
+             // > 0.25mi² show mi²
+             d1 = d / 27878400;
+             unit1 = 'square_miles';
            } else {
-             errorHandler.error('entity not found:' + a);
-             return a;
+             d1 = d;
+             unit1 = 'square_feet';
            }
-         }
 
-         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;
+           if (d > 4356 && d < 43560000) {
+             // 0.1 - 1000 acres
+             d2 = d / 43560;
+             unit2 = 'acres';
            }
-         }
-
-         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)
+         } else {
+           if (d >= 250000) {
+             // > 0.25km² show km²
+             d1 = d / 1000000;
+             unit1 = 'square_kilometers';
+           } else {
+             d1 = d;
+             unit1 = 'square_meters';
            }
 
-           locator.columnNumber = p - lineStart + 1;
+           if (d > 1000 && d < 10000000) {
+             // 0.1 - 1000 hectares
+             d2 = d / 10000;
+             unit2 = 'hectares';
+           }
          }
 
-         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);
+         area = _t('units.' + unit1, {
+           quantity: d1.toLocaleString(locale, {
+             maximumSignificantDigits: 4
+           })
+         });
 
-             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;
-               }
+         if (d2) {
+           return _t('units.area_pair', {
+             area1: area,
+             area2: _t('units.' + unit2, {
+               quantity: d2.toLocaleString(locale, {
+                 maximumSignificantDigits: 2
+               })
+             })
+           });
+         } else {
+           return area;
+         }
+       }
 
-               return;
-             }
+       function wrap(x, min, max) {
+         var d = max - min;
+         return ((x - min) % d + d) % d + min;
+       }
 
-             if (tagStart > start) {
-               appendText(tagStart);
-             }
+       function clamp(x, min, max) {
+         return Math.max(min, Math.min(x, max));
+       }
 
-             switch (source.charAt(tagStart + 1)) {
-               case '/':
-                 var end = source.indexOf('>', tagStart + 3);
-                 var tagName = source.substring(tagStart + 2, end);
-                 var config = parseStack.pop();
+       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;
 
-                 if (end < 0) {
-                   tagName = source.substring(tagStart + 2).replace(/[\s<].*/, ''); //console.error('#@@@@@@'+tagName)
+         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)
+           });
+         }
 
-                   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);
+         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
+        */
 
 
-                 var localNSMap = config.localNSMap;
-                 var endMatch = config.tagName == tagName;
-                 var endIgnoreCaseMach = endMatch || config.tagName && config.tagName.toLowerCase() == tagName.toLowerCase();
+       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
+        */
 
-                 if (endIgnoreCaseMach) {
-                   domBuilder.endElement(config.uri, config.localName, tagName);
+       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)
+         });
+       }
 
-                   if (localNSMap) {
-                     for (var prefix in localNSMap) {
-                       domBuilder.endPrefixMapping(prefix);
-                     }
-                   }
+       function uiPanelLocation(context) {
+         var currLocation = '';
 
-                   if (!endMatch) {
-                     errorHandler.fatalError("end tag name: " + tagName + ' is not match the current start tagName:' + config.tagName);
-                   }
-                 } else {
-                   parseStack.push(config);
-                 }
+         function redraw(selection) {
+           selection.html('');
+           var list = selection.append('ul'); // Mouse coordinates
 
-                 end++;
-                 break;
-               // end elment
+           var coord = context.map().mouseCoordinates();
 
-               case '?':
-                 // <?...?>
-                 locator && position(tagStart);
-                 end = parseInstruction(source, tagStart, domBuilder);
-                 break;
+           if (coord.some(isNaN)) {
+             coord = context.map().center();
+           }
 
-               case '!':
-                 // <!doctype,<![CDATA,<!--
-                 locator && position(tagStart);
-                 end = parseDCC(source, tagStart, domBuilder, errorHandler);
-                 break;
+           list.append('li').text(dmsCoordinatePair(coord)).append('li').text(decimalCoordinatePair(coord)); // Location Info
 
-               default:
-                 locator && position(tagStart);
-                 var el = new ElementAttributes();
-                 var currentNSMap = parseStack[parseStack.length - 1].currentNSMap; //elStartEnd
+           selection.append('div').attr('class', 'location-info').text(currLocation || ' ');
+           debouncedGetLocation(selection, coord);
+         }
 
-                 var end = parseElementStartPart(source, tagStart, el, currentNSMap, entityReplacer, errorHandler);
-                 var len = el.length;
+         var debouncedGetLocation = debounce(getLocation, 250);
 
-                 if (!el.closed && fixSelfClosed(source, end, el.tagName, closeMap)) {
-                   el.closed = true;
+         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);
+             });
+           }
+         }
 
-                   if (!entityMap.nbsp) {
-                     errorHandler.warning('unclosed xml attribute');
-                   }
-                 }
+         var panel = function panel(selection) {
+           selection.call(redraw);
+           context.surface().on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function () {
+             selection.call(redraw);
+           });
+         };
 
-                 if (locator && len) {
-                   var locator2 = copyLocator(locator, {}); //try{//attribute position fixed
+         panel.off = function () {
+           context.surface().on('.info-location', null);
+         };
 
-                   for (var i = 0; i < len; i++) {
-                     var a = el[i];
-                     position(a.offset);
-                     a.locator = copyLocator(locator, {});
-                   } //}catch(e){console.error('@@@@@'+e)}
+         panel.id = 'location';
+         panel.label = _t.html('info_panels.location.title');
+         panel.key = _t('info_panels.location.key');
+         return panel;
+       }
 
+       function uiPanelMeasurement(context) {
+         function radiansToMeters(r) {
+           // using WGS84 authalic radius (6371007.1809 m)
+           return r * 6371007.1809;
+         }
 
-                   domBuilder.locator = locator2;
+         function steradiansToSqmeters(r) {
+           // http://gis.stackexchange.com/a/124857/40446
+           return r / (4 * Math.PI) * 510065621724000;
+         }
 
-                   if (appendElement(el, domBuilder, currentNSMap)) {
-                     parseStack.push(el);
-                   }
+         function toLineString(feature) {
+           if (feature.type === 'LineString') return feature;
+           var result = {
+             type: 'LineString',
+             coordinates: []
+           };
 
-                   domBuilder.locator = locator;
-                 } else {
-                   if (appendElement(el, domBuilder, currentNSMap)) {
-                     parseStack.push(el);
-                   }
-                 }
+           if (feature.type === 'Polygon') {
+             result.coordinates = feature.coordinates[0];
+           } else if (feature.type === 'MultiPolygon') {
+             result.coordinates = feature.coordinates[0][0];
+           }
 
-                 if (el.uri === 'http://www.w3.org/1999/xhtml' && !el.closed) {
-                   end = parseHtmlSpecialContent(source, end, el.tagName, entityReplacer, domBuilder);
-                 } else {
-                   end++;
-                 }
+           return result;
+         }
 
-             }
-           } catch (e) {
-             errorHandler.error('element parse error: ' + e); //errorHandler.error('element parse error: '+e);
+         var _isImperial = !_mainLocalizer.usesMetric();
 
-             end = -1; //throw e;
-           }
+         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 (end > start) {
-             start = end;
+           if (selectedNoteID && osm) {
+             // selected 1 note
+             var note = osm.getNote(selectedNoteID);
+             heading = _t.html('note.note') + ' ' + selectedNoteID;
+             location = note.loc;
+             geometry = 'note';
            } else {
-             //TODO: 这里有可能sax回退,有位置错误风险
-             appendText(Math.max(tagStart, start) + 1);
-           }
-         }
-       }
+             // 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
+             });
 
-       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)
-        */
+             if (selected.length) {
+               var extent = geoExtent();
 
+               for (var i in selected) {
+                 var entity = selected[i];
 
-       function parseElementStartPart(source, start, el, currentNSMap, entityReplacer, errorHandler) {
-         var attrName;
-         var value;
-         var p = ++start;
-         var s = S_TAG; //status
+                 extent._extend(entity.extent(graph));
 
-         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');
-               }
+                 geometry = entity.geometry(graph);
 
-               break;
+                 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);
 
-             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);
+                   if (!centroid || !isFinite(centroid[0]) || !isFinite(centroid[1])) {
+                     centroid = entity.extent(graph).center();
                    }
 
-                   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');
+                   if (closed) {
+                     area += steradiansToSqmeters(entity.area(graph));
                    }
-                 } else if (s == S_ATTR_NOQUOT_VALUE) {
-                 value = source.slice(start, p).replace(/&#?\w+;/g, entityReplacer); //console.log(attrName,value,start,p)
+                 }
+               }
 
-                 el.add(attrName, value, start); //console.dir(el)
+               if (selected.length > 1) {
+                 geometry = null;
+                 closed = null;
+                 centroid = null;
+               }
 
-                 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 "="');
+               if (selected.length === 2 && selected[0].type === 'node' && selected[1].type === 'node') {
+                 distance = geoSphericalDistance(selected[0].loc, selected[1].loc);
                }
 
-               break;
+               if (selected.length === 1 && selected[0].type === 'node') {
+                 location = selected[0].loc;
+               } else {
+                 totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
+               }
 
-             case '/':
-               switch (s) {
-                 case S_TAG:
-                   el.setTagName(source.slice(start, p));
+               if (!location && !centroid) {
+                 center = extent.center();
+               }
+             }
+           }
 
-                 case S_ATTR_END:
-                 case S_TAG_SPACE:
-                 case S_TAG_CLOSE:
-                   s = S_TAG_CLOSE;
-                   el.closed = true;
+           selection.html('');
 
-                 case S_ATTR_NOQUOT_VALUE:
-                 case S_ATTR:
-                 case S_ATTR_SPACE:
-                   break;
-                 //case S_EQ:
+           if (heading) {
+             selection.append('h4').attr('class', 'measurement-heading').html(heading);
+           }
 
-                 default:
-                   throw new Error("attribute invalid close char('/')");
-               }
+           var list = selection.append('ul');
+           var coordItem;
 
-               break;
+           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));
+           }
 
-             case '':
-               //end document
-               //throw new Error('unexpected end of input')
-               errorHandler.error('unexpected end of input');
+           if (totalNodeCount) {
+             list.append('li').call(_t.append('info_panels.measurement.node_count', {
+               suffix: ':'
+             })).append('span').text(totalNodeCount.toLocaleString(localeCode));
+           }
 
-               if (s == S_TAG) {
-                 el.setTagName(source.slice(start, p));
-               }
+           if (area) {
+             list.append('li').call(_t.append('info_panels.measurement.area', {
+               suffix: ':'
+             })).append('span').text(displayArea(area, _isImperial));
+           }
 
-               return p;
+           if (length) {
+             list.append('li').call(_t.append('info_panels.measurement.' + (closed ? 'perimeter' : 'length'), {
+               suffix: ':'
+             })).append('span').text(displayLength(length, _isImperial));
+           }
 
-             case '>':
-               switch (s) {
-                 case S_TAG:
-                   el.setTagName(source.slice(start, p));
+           if (typeof distance === 'number') {
+             list.append('li').call(_t.append('info_panels.measurement.distance', {
+               suffix: ':'
+             })).append('span').text(displayLength(distance, _isImperial));
+           }
 
-                 case S_ATTR_END:
-                 case S_TAG_SPACE:
-                 case S_TAG_CLOSE:
-                   break;
-                 //normal
+           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));
+           }
 
-                 case S_ATTR_NOQUOT_VALUE: //Compatible state
+           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));
+           }
 
-                 case S_ATTR:
-                   value = source.slice(start, p);
+           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));
+           }
 
-                   if (value.slice(-1) === '/') {
-                     el.closed = true;
-                     value = value.slice(0, -1);
-                   }
+           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);
+             });
+           }
+         }
 
-                 case S_ATTR_SPACE:
-                   if (s === S_ATTR_SPACE) {
-                     value = attrName;
-                   }
+         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);
+           });
+         };
 
-                   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!!');
-                     }
+         panel.off = function () {
+           context.map().on('drawn.info-measurement', null);
+           context.on('enter.info-measurement', null);
+         };
 
-                     el.add(value, value, start);
-                   }
+         panel.id = 'measurement';
+         panel.label = _t.html('info_panels.measurement.title');
+         panel.key = _t('info_panels.measurement.key');
+         return panel;
+       }
 
-                   break;
+       var uiInfoPanels = {
+         background: uiPanelBackground,
+         history: uiPanelHistory,
+         location: uiPanelLocation,
+         measurement: uiPanelMeasurement
+       };
 
-                 case S_EQ:
-                   throw new Error('attribute value missed!!');
-               } //                    console.log(tagName,tagNamePattern,tagNamePattern.test(tagName))
+       function uiInfo(context) {
+         var ids = Object.keys(uiInfoPanels);
+         var wasActive = ['measurement'];
+         var panels = {};
+         var active = {}; // create panels
 
+         ids.forEach(function (k) {
+           if (!panels[k]) {
+             panels[k] = uiInfoPanels[k](context);
+             active[k] = false;
+           }
+         });
 
-               return p;
+         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
 
-             /*xml space '\x20' | #x9 | #xD | #xA; */
+             infoPanels.selectAll('.panel-content').each(function (d) {
+               select(this).call(panels[d]);
+             });
+           }
 
-             case "\x80":
-               c = ' ';
+           info.toggle = function (which) {
+             var activeids = ids.filter(function (k) {
+               return active[k];
+             });
 
-             default:
-               if (c <= ' ') {
-                 //space
-                 switch (s) {
-                   case S_TAG:
-                     el.setTagName(source.slice(start, p)); //tagName
+             if (which) {
+               // toggle one
+               active[which] = !active[which];
 
-                     s = S_TAG_SPACE;
-                     break;
+               if (activeids.length === 1 && activeids[0] === which) {
+                 // none active anymore
+                 wasActive = [which];
+               }
 
-                   case S_ATTR:
-                     attrName = source.slice(start, p);
-                     s = S_ATTR_SPACE;
-                     break;
+               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 {
+                 wasActive.forEach(function (k) {
+                   active[k] = true;
+                 });
+               }
+             }
 
-                   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);
+             redraw();
+           };
 
-                   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!!');
-                     }
+           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
+             });
+             if (!key) return;
+             context.keybinding().on(uiCmd('⌘⇧' + key), function (d3_event) {
+               d3_event.stopImmediatePropagation();
+               d3_event.preventDefault();
+               info.toggle(k);
+             });
+           });
+         }
 
-                     el.add(attrName, attrName, start);
-                     start = p;
-                     s = S_ATTR;
-                     break;
+         return info;
+       }
 
-                   case S_ATTR_END:
-                     errorHandler.warning('attribute space is required"' + attrName + '"!!');
+       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;
 
-                   case S_TAG_SPACE:
-                     s = S_ATTR;
-                     start = p;
-                     break;
+         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;
+         }
 
-                   case S_EQ:
-                     s = S_ATTR_NOQUOT_VALUE;
-                     start = p;
-                     break;
+         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`
 
-                   case S_TAG_CLOSE:
-                     throw new Error("elements closed character '/' and '>' must be connected to");
-                 }
-               }
+       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')
+           };
 
-           } //end outer switch
-           //console.log('p++',p)
+           for (var key in helpStringReplacements) {
+             helpStringReplacements[key] = {
+               html: helpStringReplacements[key]
+             };
+           }
+         }
 
+         var reps;
 
-           p++;
+         if (replacements) {
+           reps = Object.assign(replacements, helpStringReplacements);
+         } else {
+           reps = helpStringReplacements;
          }
-       }
-       /**
-        * @return true if has new namespace define
-        */
 
+         return _t.html(id, reps) // use keyboard key styling for shortcuts
+         .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
+       }
 
-       function appendElement(el, domBuilder, currentNSMap) {
-         var tagName = el.tagName;
-         var localNSMap = null; //var currentNSMap = parseStack[parseStack.length-1].currentNSMap;
+       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 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 !== ''
+       var missingStrings = {};
 
+       function checkKey(key, text) {
+         if (_t(key, {
+           "default": undefined
+         }) === undefined) {
+           if (missingStrings.hasOwnProperty(key)) return; // warn once
 
-           a.localName = localName; //prefix == null for no ns prefix attribute 
+           missingStrings[key] = text;
+           var missing = key + ': ' + text;
+           if (typeof console !== 'undefined') console.log(missing); // eslint-disable-line
+         }
+       }
 
-           if (nsPrefix !== false) {
-             //hack!!
-             if (localNSMap == null) {
-               localNSMap = {}; //console.log(currentNSMap,0)
+       function localize(obj) {
+         var key; // Assign name if entity has one..
 
-               _copy(currentNSMap, currentNSMap = {}); //console.log(currentNSMap,1)
+         var name = obj.tags && obj.tags.name;
 
-             }
+         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..
 
-             currentNSMap[nsPrefix] = localNSMap[nsPrefix] = value;
-             a.uri = 'http://www.w3.org/2000/xmlns/';
-             domBuilder.startPrefixMapping(nsPrefix, value);
-           }
-         }
 
-         var i = el.length;
+         var street = obj.tags && obj.tags['addr:street'];
 
-         while (i--) {
-           a = el[i];
-           var prefix = a.prefix;
+         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..
 
-           if (prefix) {
-             //no prefix attribute has no namespace
-             if (prefix === 'xml') {
-               a.uri = 'http://www.w3.org/XML/1998/namespace';
-             }
+           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 (prefix !== 'xmlns') {
-               a.uri = currentNSMap[prefix || '']; //{console.log('###'+a.qName,domBuilder.locator.systemId+'',currentNSMap,a.uri)}
+             if (str) {
+               if (str.match(/^<.*>$/) !== null) {
+                 delete obj.tags[tag];
+               } else {
+                 obj.tags[tag] = str;
+               }
              }
-           }
+           });
          }
 
-         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!!
+         return obj;
+       } // Used to detect squareness.. some duplicataion of code from actionOrthogonalize.
 
-           localName = el.localName = tagName;
-         } //no prefix element has default namespace
+       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 lowerBound = Math.cos((90 - threshold) * Math.PI / 180); // near right
 
-         var ns = el.uri = currentNSMap[prefix || ''];
-         domBuilder.startElement(ns, localName, tagName, el); //endPrefixMapping and startPrefixMapping have not any help for dom builder
-         //localNSMap = null
+         var upperBound = Math.cos(threshold * Math.PI / 180); // near straight
 
-         if (el.closed) {
-           domBuilder.endElement(ns, localName, tagName);
+         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 (localNSMap) {
-             for (prefix in localNSMap) {
-               domBuilder.endPrefixMapping(prefix);
-             }
+           if (mag > lowerBound && mag < upperBound) {
+             return false;
            }
-         } else {
-           el.currentNSMap = currentNSMap;
-           el.localNSMap = localNSMap; //parseStack.push(el);
+         }
 
-           return true;
+         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 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);
+       // 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 (/[&<]/.test(text)) {
-             if (/^script$/i.test(tagName)) {
-               //if(!/\]\]>/.test(text)){
-               //lexHandler.startCDATA();
-               domBuilder.characters(text, 0, text.length); //lexHandler.endCDATA();
+       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 elEndStart; //}
-             } //}else{//text area
+       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();
 
-             text = text.replace(/&#?\w+;/g, entityReplacer);
-             domBuilder.characters(text, 0, text.length);
-             return elEndStart; //}
+           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
+          */
 
-         return elStartEnd + 1;
-       }
 
-       function fixSelfClosed(source, elStartEnd, tagName, closeMap) {
-         //if(tagName in closeMap){
-         var pos = closeMap[tagName];
+         curtain.reveal = function (box, html, options) {
+           options = options || {};
 
-         if (pos == null) {
-           //console.log(tagName)
-           pos = source.lastIndexOf('</' + tagName + '>');
+           if (typeof box === 'string') {
+             box = select(box).node();
+           }
 
-           if (pos < elStartEnd) {
-             //忘记闭合
-             pos = source.lastIndexOf('</' + tagName);
+           if (box && box.getBoundingClientRect) {
+             box = copyBox(box.getBoundingClientRect());
+             var containerRect = containerNode.getBoundingClientRect();
+             box.top -= containerRect.top;
+             box.left -= containerRect.left;
            }
 
-           closeMap[tagName] = pos;
-         }
+           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;
+           }
 
-         return pos < elStartEnd; //} 
-       }
+           var tooltipBox;
 
-       function _copy(source, target) {
-         for (var n in source) {
-           target[n] = source[n];
-         }
-       }
+           if (options.tooltipBox) {
+             tooltipBox = options.tooltipBox;
 
-       function parseDCC(source, start, domBuilder, errorHandler) {
-         //sure start with '<!'
-         var next = source.charAt(start + 2);
+             if (typeof tooltipBox === 'string') {
+               tooltipBox = select(tooltipBox).node();
+             }
 
-         switch (next) {
-           case '-':
-             if (source.charAt(start + 3) === '-') {
-               var end = source.indexOf('-->', start + 4); //append comment source.substring(4,end)//<!--
+             if (tooltipBox && tooltipBox.getBoundingClientRect) {
+               tooltipBox = copyBox(tooltipBox.getBoundingClientRect());
+             }
+           } else {
+             tooltipBox = box;
+           }
 
-               if (end > start) {
-                 domBuilder.comment(source, start + 4, end - start - 4);
-                 return end + 3;
+           if (tooltipBox && html) {
+             if (html.indexOf('**') !== -1) {
+               if (html.indexOf('<span') === 0) {
+                 html = html.replace(/^(<span.*?>)(.+?)(\*\*)/, '$1<span>$2</span>$3');
                } else {
-                 errorHandler.error("Unclosed comment");
-                 return -1;
-               }
-             } else {
-               //error
-               return -1;
-             }
+                 html = html.replace(/^(.+?)(\*\*)/, '<span>$1</span>$2');
+               } // pseudo markdown bold text for the instruction section..
 
-           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) 
 
+               html = html.replace(/\*\*(.*?)\*\*/g, '<span class="instruction">$1</span>');
+             }
+
+             html = html.replace(/\*(.*?)\*/g, '<em>$1</em>'); // emphasis
 
-             var matchs = split$1(source, start);
-             var len = matchs.length;
+             html = html.replace(/\{br\}/g, '<br/><br/>'); // linebreak
 
-             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;
+             if (options.buttonText && options.buttonCallback) {
+               html += '<div class="button-section">' + '<button href="#" class="button action">' + options.buttonText + '</button></div>';
              }
 
-         }
+             var classes = 'curtain-tooltip popover tooltip arrowed in ' + (options.tooltipClass || '');
+             tooltip.classed(classes, true).selectAll('.popover-inner').html(html);
 
-         return -1;
-       }
+             if (options.buttonText && options.buttonCallback) {
+               var button = tooltip.selectAll('.button-section .button.action');
+               button.on('click', function (d3_event) {
+                 d3_event.preventDefault();
+                 options.buttonCallback();
+               });
+             }
 
-       function parseInstruction(source, start, domBuilder) {
-         var end = source.indexOf('?>', start);
+             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.
 
-         if (end) {
-           var match = source.substring(start, end).match(/^<\?(\S*)\s*([\s\S]*?)\s*$/);
+             if (options.tooltipClass === 'intro-mouse') {
+               tip.height += 80;
+             } // trim box dimensions to just the portion that fits in the container..
 
-           if (match) {
-             var len = match[0].length;
-             domBuilder.processingInstruction(match[1], match[2]);
-             return end + 2;
-           } else {
-             //error
-             return -1;
-           }
-         }
 
-         return -1;
-       }
-       /**
-        * @param source
-        */
+             if (tooltipBox.top + tooltipBox.height > h) {
+               tooltipBox.height -= tooltipBox.top + tooltipBox.height - h;
+             }
 
+             if (tooltipBox.left + tooltipBox.width > w) {
+               tooltipBox.width -= tooltipBox.left + tooltipBox.width - w;
+             } // determine tooltip placement..
 
-       function ElementAttributes(source) {}
 
-       ElementAttributes.prototype = {
-         setTagName: function setTagName(tagName) {
-           if (!tagNamePattern.test(tagName)) {
-             throw new Error('invalid tagName:' + tagName);
-           }
+             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;
 
-           this.tagName = tagName;
-         },
-         add: function add(qName, value, offset) {
-           if (!tagNamePattern.test(qName)) {
-             throw new Error('invalid attribute:' + qName);
-           }
+               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];
+                 }
+               }
+             }
 
-           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){},
+             if (options.duration !== 0 || !tooltip.classed(side)) {
+               tooltip.call(uiToggle(true));
+             }
 
-       };
+             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 _set_proto_(thiz, parent) {
-         thiz.__proto__ = parent;
-         return thiz;
-       }
+             var shiftY = 0;
 
-       if (!(_set_proto_({}, _set_proto_.prototype) instanceof _set_proto_)) {
-         _set_proto_ = function _set_proto_(thiz, parent) {
-           function p() {}
-           p.prototype = parent;
-           p = new p();
+             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;
+               }
+             }
 
-           for (parent in thiz) {
-             p[parent] = thiz[parent];
+             tooltip.selectAll('.popover-inner').style('top', shiftY + 'px');
+           } else {
+             tooltip.classed('in', false).call(uiToggle(false));
            }
 
-           return p;
+           curtain.cut(box, options.duration);
+           return tooltip;
          };
-       }
-
-       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;
-         }
-       }
+         curtain.cut = function (datum, duration) {
+           darkness.datum(datum).interrupt();
+           var selection;
 
-       var XMLReader_1 = XMLReader;
-       var sax = {
-         XMLReader: XMLReader_1
-       };
+           if (duration === 0) {
+             selection = darkness;
+           } else {
+             selection = darkness.transition().duration(duration || 600).ease(linear$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];
-         }
-       }
-       /**
-       ^\w+\.prototype\.([_\w]+)\s*=\s*((?:.*\{\s*?[\r\n][\s\S]*?^})|\S.*?(?=[;\r\n]));?
-       ^\w+\.prototype\.([_\w]+)\s*=\s*(\S.*?(?=[;\r\n]));?
-        */
+           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';
+           });
+         };
 
+         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 _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 copyBox(src) {
+           return {
+             top: src.top,
+             right: src.right,
+             bottom: src.bottom,
+             left: src.left,
+             width: src.width,
+             height: src.height
+           };
          }
 
-         error.code = code;
-         if (message) this.message = this.message + ": " + message;
-         return error;
+         return curtain;
        }
-       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,
 
-         /**
-          * 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);
-           }
+       function uiIntroWelcome(context, reveal) {
+         var dispatch = dispatch$8('done');
+         var chapter = {
+           title: 'intro.welcome.title'
+         };
 
-           return buf.join('');
+         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
+           });
          }
-       };
 
-       function LiveNodeList(node, refresh) {
-         this._node = node;
-         this._refresh = refresh;
-
-         _updateLiveList(this);
-       }
-
-       function _updateLiveList(list) {
-         var inc = list._node._inc || list._node.ownerDocument._inc;
-
-         if (list._inc != inc) {
-           var ls = list._refresh(list._node); //console.log(ls.length)
-
-
-           __set__(list, 'length', ls.length);
+         function practice() {
+           reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.practice'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: words
+           });
+         }
 
-           copy$1(ls, list);
-           list._inc = inc;
+         function words() {
+           reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.words'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: chapters
+           });
          }
-       }
 
-       LiveNodeList.prototype.item = function (i) {
-         _updateLiveList(this);
+         function chapters() {
+           dispatch.call('done');
+           reveal('.intro-nav-wrap .chapter-navigation', helpHtml('intro.welcome.chapters', {
+             next: _t('intro.navigation.title')
+           }));
+         }
 
-         return this[i];
-       };
+         chapter.enter = function () {
+           welcome();
+         };
 
-       _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 
-        */
+         chapter.exit = function () {
+           context.container().select('.curtain-tooltip.intro-mouse').selectAll('.counter').remove();
+         };
 
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };
 
-       function NamedNodeMap() {}
+         return utilRebind(chapter, dispatch, 'on');
+       }
 
-       function _findNodeIndex(list, node) {
-         var i = list.length;
+       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'
+         };
 
-         while (i--) {
-           if (list[i] === node) {
-             return i;
-           }
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
          }
-       }
 
-       function _addNamedNode(el, list, newAttr, oldAttr) {
-         if (oldAttr) {
-           list[_findNodeIndex(list, oldAttr)] = newAttr;
-         } else {
-           list[list.length++] = newAttr;
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
          }
 
-         if (el) {
-           newAttr.ownerElement = el;
-           var doc = el.ownerDocument;
-
-           if (doc) {
-             oldAttr && _onRemoveAttribute(doc, el, oldAttr);
-
-             _onAddAttribute(doc, el, newAttr);
-           }
+         function isTownHallSelected() {
+           var ids = context.selectedIDs();
+           return ids.length === 1 && ids[0] === hallId;
          }
-       }
 
-       function _removeNamedNode(el, list, attr) {
-         //console.log('remove attr:'+attr)
-         var i = _findNodeIndex(list, attr);
-
-         if (i >= 0) {
-           var lastIndex = list.length - 1;
+         function dragMap() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           var msec = transitionTime(townHall, context.map().center());
 
-           while (i < lastIndex) {
-             list[i] = list[++i];
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
            }
 
-           list.length = lastIndex;
-
-           if (el) {
-             var doc = el.ownerDocument;
+           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();
 
-             if (doc) {
-               _onRemoveAttribute(doc, el, attr);
+               if (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
+                 context.map().on('move.intro', null);
+                 timeout(function () {
+                   continueTo(zoomMap);
+                 }, 3000);
+               }
+             });
+           }, msec + 100);
 
-               attr.ownerElement = null;
-             }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
            }
-         } 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;
 
-           while (i--) {
-             var attr = this[i]; //console.log(attr.nodeName,key)
-
-             if (attr.nodeName == key) {
-               return attr;
+         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);
              }
-           }
-         },
-         setNamedItem: function setNamedItem(attr) {
-           var el = attr.ownerElement;
-
-           if (el && el != this._ownerElement) {
-             throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
-           }
-
-           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);
-           }
-
-           oldAttr = this.getNamedItemNS(attr.namespaceURI, attr.localName);
-
-           _addNamedNode(this._ownerElement, this, attr, oldAttr);
-
-           return oldAttr;
-         },
-
-         /* returns Node */
-         removeNamedItem: function removeNamedItem(key) {
-           var attr = this.getNamedItem(key);
-
-           _removeNamedNode(this._ownerElement, this, attr);
-
-           return attr;
-         },
-         // raises: NOT_FOUND_ERR,NO_MODIFICATION_ALLOWED_ERR
-         //for level2
-         removeNamedItemNS: function removeNamedItemNS(namespaceURI, localName) {
-           var attr = this.getNamedItemNS(namespaceURI, localName);
-
-           _removeNamedNode(this._ownerElement, this, attr);
-
-           return attr;
-         },
-         getNamedItemNS: function getNamedItemNS(namespaceURI, localName) {
-           var i = this.length;
-
-           while (i--) {
-             var node = this[i];
+           });
 
-             if (node.localName == localName && node.namespaceURI == namespaceURI) {
-               return node;
-             }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
            }
-
-           return null;
          }
-       };
-       /**
-        * @see http://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-102161490
-        */
 
-       function DOMImplementation(
-       /* Object */
-       features) {
-         this._features = {};
+         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
+             });
+           });
 
-         if (features) {
-           for (var feature in features) {
-             this._features = features[feature];
+           function continueTo(nextStep) {
+             context.map().on('drawn.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;
-           }
-         },
-         // 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;
+         function pointsLinesAreas() {
+           var onClick = function onClick() {
+             continueTo(nodesWays);
+           };
 
-           if (doctype) {
-             doc.appendChild(doctype);
-           }
+           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
+             });
+           });
 
-           if (qualifiedName) {
-             var root = doc.createElementNS(namespaceURI, qualifiedName);
-             doc.appendChild(root);
+           function continueTo(nextStep) {
+             context.map().on('drawn.intro', null);
+             nextStep();
            }
+         }
 
-           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;
+         function nodesWays() {
+           var onClick = function onClick() {
+             continueTo(clickTownHall);
+           };
 
-           return node;
-         }
-       };
-       /**
-        * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247
-        */
+           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
+             });
+           });
 
-       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;
-             }
+           function continueTo(nextStep) {
+             context.map().on('drawn.intro', null);
+             nextStep();
            }
-         },
-         // 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;
+         }
 
-           while (el) {
-             var map = el._nsMap; //console.dir(map)
+         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
 
-             if (map) {
-               for (var n in map) {
-                 if (map[n] == namespaceURI) {
-                   return n;
-                 }
-               }
+           context.history().on('change.intro', function () {
+             if (!context.hasEntity(hallId)) {
+               continueTo(clickTownHall);
              }
+           });
 
-             el = el.nodeType == ATTRIBUTE_NODE ? el.ownerDocument : el.parentNode;
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
+         }
 
-           return null;
-         },
-         // Introduced in DOM Level 3:
-         lookupNamespaceURI: function lookupNamespaceURI(prefix) {
-           var el = this;
+         function selectedTownHall() {
+           if (!isTownHallSelected()) return clickTownHall();
+           var entity = context.hasEntity(hallId);
+           if (!entity) return clickTownHall();
+           var box = pointBox(entity.loc, context);
 
-           while (el) {
-             var map = el._nsMap; //console.dir(map)
+           var onClick = function onClick() {
+             continueTo(editorTownHall);
+           };
 
-             if (map) {
-               if (prefix in map) {
-                 return map[prefix];
-               }
+           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);
              }
+           });
 
-             el = el.nodeType == ATTRIBUTE_NODE ? el.ownerDocument : el.parentNode;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.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() + ';';
-       }
+         function editorTownHall() {
+           if (!isTownHallSelected()) return clickTownHall(); // disallow scrolling
 
-       copy$1(NodeType, Node);
-       copy$1(NodeType, Node.prototype);
-       /**
-        * @param callback return true for continue,false for break
-        * @return boolean true: break visit;
-        */
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-       function _visitNode(node, callback) {
-         if (callback(node)) {
-           return true;
-         }
+           var onClick = function onClick() {
+             continueTo(presetTownHall);
+           };
 
-         if (node = node.firstChild) {
-           do {
-             if (_visitNode(node, callback)) {
-               return true;
+           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);
              }
-           } while (node = node.nextSibling);
-         }
-       }
-
-       function Document() {}
-
-       function _onAddAttribute(doc, el, newAttr) {
-         doc && doc._inc++;
-         var ns = newAttr.namespaceURI;
+           });
 
-         if (ns == 'http://www.w3.org/2000/xmlns/') {
-           //update namespace
-           el._nsMap[newAttr.prefix ? newAttr.localName : ''] = newAttr.value;
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             nextStep();
+           }
          }
-       }
 
-       function _onRemoveAttribute(doc, el, newAttr, remove) {
-         doc && doc._inc++;
-         var ns = newAttr.namespaceURI;
+         function presetTownHall() {
+           if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
 
-         if (ns == 'http://www.w3.org/2000/xmlns/') {
-           //update namespace
-           delete el._nsMap[newAttr.prefix ? newAttr.localName : ''];
-         }
-       }
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
 
-       function _onUpdateChild(doc, el, newChild) {
-         if (doc && doc._inc) {
-           doc._inc++; //update childNodes
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel); // preset match, in case the user happened to change it.
 
-           var cs = el.childNodes;
+           var entity = context.entity(context.selectedIDs()[0]);
+           var preset = _mainPresetIndex.match(entity, context.graph());
 
-           if (newChild) {
-             cs[cs.length++] = newChild;
-           } else {
-             //console.log(1)
-             var child = el.firstChild;
-             var i = 0;
+           var onClick = function onClick() {
+             continueTo(fieldsTownHall);
+           };
 
-             while (child) {
-               cs[i++] = child;
-               child = child.nextSibling;
+           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);
              }
+           });
 
-             cs.length = i;
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             context.container().select('.inspector-wrap').on('wheel.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;
-         }
-
-         if (next) {
-           next.previousSibling = previous;
-         } else {
-           parentNode.lastChild = previous;
-         }
-
-         _onUpdateChild(parentNode.ownerDocument, parentNode);
 
-         return child;
-       }
-       /**
-        * preformance key(refChild == null)
-        */
+         function fieldsTownHall() {
+           if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
 
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
 
-       function _insertBefore(parentNode, newChild, nextChild) {
-         var cp = newChild.parentNode;
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-         if (cp) {
-           cp.removeChild(newChild); //remove and update
-         }
+           var onClick = function onClick() {
+             continueTo(closeTownHall);
+           };
 
-         if (newChild.nodeType === DOCUMENT_FRAGMENT_NODE) {
-           var newFirst = newChild.firstChild;
+           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 (newFirst == null) {
-             return newChild;
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             nextStep();
            }
-
-           var newLast = newChild.lastChild;
-         } else {
-           newFirst = newLast = newChild;
          }
 
-         var pre = nextChild ? nextChild.previousSibling : parentNode.lastChild;
-         newFirst.previousSibling = pre;
-         newLast.nextSibling = nextChild;
+         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 (pre) {
-           pre.nextSibling = newFirst;
-         } else {
-           parentNode.firstChild = newFirst;
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
          }
 
-         if (nextChild == null) {
-           parentNode.lastChild = newLast;
-         } else {
-           nextChild.previousSibling = newLast;
-         }
+         function searchStreet() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial'); // ensure spring street exists
 
-         do {
-           newFirst.parentNode = parentNode;
-         } while (newFirst !== newLast && (newFirst = newFirst.nextSibling));
+           var msec = transitionTime(springStreet, context.map().center());
 
-         _onUpdateChild(parentNode.ownerDocument || parentNode, parentNode); //console.log(parentNode.lastChild.nextSibling == null)
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }
 
+           context.map().centerZoomEase(springStreet, 19, msec); // ..and user can see it
 
-         if (newChild.nodeType == DOCUMENT_FRAGMENT_NODE) {
-           newChild.firstChild = newChild.lastChild = null;
+           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);
          }
 
-         return newChild;
-       }
-
-       function _appendSingleChild(parentNode, newChild) {
-         var cp = newChild.parentNode;
-
-         if (cp) {
-           var pre = parentNode.lastChild;
-           cp.removeChild(newChild); //remove and update
+         function checkSearchResult() {
+           var first = context.container().select('.feature-list-item:nth-child(0n+2)'); // skip "No Results" item
 
-           var pre = parentNode.lastChild;
-         }
+           var firstName = first.select('.entity-name');
+           var name = _t('intro.graph.name.spring-street');
 
-         var pre = parentNode.lastChild;
-         newChild.parentNode = parentNode;
-         newChild.previousSibling = pre;
-         newChild.nextSibling = null;
+           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 (pre) {
-           pre.nextSibling = newChild;
-         } else {
-           parentNode.firstChild = newChild;
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.container().select('.search-header input').on('keydown.intro', null).on('keyup.intro', null);
+             nextStep();
+           }
          }
 
-         parentNode.lastChild = newChild;
-
-         _onUpdateChild(parentNode.ownerDocument, parentNode, newChild);
+         function selectedStreet() {
+           if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
+             return searchStreet();
+           }
 
-         return newChild; //console.log("__aa",parentNode.lastChild.nextSibling == null)
-       }
+           var onClick = function onClick() {
+             continueTo(editorStreet);
+           };
 
-       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 = 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.
 
-             while (child) {
-               var next = child.nextSibling;
-               this.insertBefore(child, refChild);
-               child = next;
+           context.on('enter.intro', function (mode) {
+             if (!context.hasEntity(springStreetId)) {
+               return continueTo(searchStreet);
              }
 
-             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;
-           }
-
-           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;
+             var ids = context.selectedIDs();
 
-           _visitNode(this.documentElement, function (node) {
-             if (node.nodeType == ELEMENT_NODE) {
-               if (node.getAttribute('id') == id) {
-                 rtv = node;
-                 return 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)
              }
            });
 
-           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;
-           }
-
-           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.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
-
-           return node;
          }
-       };
-
-       _extends(Document, Node);
-
-       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);
-           }
-         },
-         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 = [];
-
-             _visitNode(base, function (node) {
-               if (node !== base && node.nodeType == ELEMENT_NODE && (tagName === '*' || node.tagName == tagName)) {
-                 ls.push(node);
-               }
-             });
 
-             return ls;
+         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);
            });
-         },
-         getElementsByTagNameNS: function getElementsByTagNameNS(namespaceURI, localName) {
-           return new LiveNodeList(this, function (base) {
-             var ls = [];
-
-             _visitNode(base, function (node) {
-               if (node !== base && node.nodeType === ELEMENT_NODE && (namespaceURI === '*' || node.namespaceURI === namespaceURI) && (localName === '*' || node.localName == localName)) {
-                 ls.push(node);
+           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
              });
-
-             return ls;
            });
-         }
-       };
-       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 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;
-         }
-       };
-
-       _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);
-
-           if (this.parentNode) {
-             this.parentNode.insertBefore(newNode, this.nextSibling);
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             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;
-
-       _extends(ProcessingInstruction, Node);
-
-       function XMLSerializer$1() {}
-
-       XMLSerializer$1.prototype.serializeToString = function (node, isHtml, nodeFilter) {
-         return nodeSerializeToString.call(node, isHtml, nodeFilter);
-       };
-
-       Node.prototype.toString = nodeSerializeToString;
-
-       function nodeSerializeToString(isHtml, nodeFilter) {
-         var buf = [];
-         var refNode = this.nodeType == 9 ? this.documentElement : this;
-         var prefix = refNode.prefix;
-         var uri = refNode.namespaceURI;
+         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');
+             }
+           });
+         }
 
-         if (uri && prefix == null) {
-           //console.log(prefix)
-           var prefix = refNode.lookupPrefix(uri);
+         chapter.enter = function () {
+           dragMap();
+         };
 
-           if (prefix == null) {
-             //isHTML = true;
-             var visibleNamespaces = [{
-               namespace: uri,
-               prefix: null
-             } //{namespace:uri,prefix:''}
-             ];
-           }
-         }
+         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);
+         };
 
-         serializeToString(this, buf, isHtml, nodeFilter, visibleNamespaces); //console.log('###',this.nodeType,uri,prefix,buf.join(''))
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };
 
-         return buf.join('');
+         return utilRebind(chapter, dispatch, 'on');
        }
 
-       function needNamespaceDefine(node, isHTML, visibleNamespaces) {
-         var prefix = node.prefix || '';
-         var uri = node.namespaceURI;
+       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 (!prefix && !uri) {
-           return false;
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
          }
 
-         if (prefix === "xml" && uri === "http://www.w3.org/XML/1998/namespace" || uri == 'http://www.w3.org/2000/xmlns/') {
-           return false;
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
          }
 
-         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)
+         function addPoint() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           var msec = transitionTime(intersection, context.map().center());
 
-           if (ns.prefix == prefix) {
-             return ns.namespace != uri;
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
            }
-         } //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)
 
+           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);
 
-         return true;
-       }
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-       function serializeToString(node, buf, isHTML, nodeFilter, visibleNamespaces) {
-         if (nodeFilter) {
-           node = nodeFilter(node);
+         function placePoint() {
+           if (context.mode().id !== 'add-point') {
+             return chapter.restart();
+           }
 
-           if (node) {
-             if (typeof node == 'string') {
-               buf.push(node);
-               return;
-             }
-           } else {
-             return;
-           } //buf.sort.apply(attrs, attributeSorter);
+           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);
+           });
 
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.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);
+         function searchPreset() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return addPoint();
+           } // disallow scrolling
 
-             for (var i = 0; i < len; i++) {
-               // add namespaces for attributes
-               var attr = attrs.item(i);
 
-               if (attr.prefix == 'xmlns') {
-                 visibleNamespaces.push({
-                   prefix: attr.localName,
-                   namespace: attr.value
-                 });
-               } else if (attr.nodeName == 'xmlns') {
-                 visibleNamespaces.push({
-                   prefix: '',
-                   namespace: attr.value
-                 });
-               }
+           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);
              }
 
-             for (var i = 0; i < len; i++) {
-               var attr = attrs.item(i);
+             var ids = context.selectedIDs();
 
-               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
-                 });
-               }
+             if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
+               // keep the user's point selected..
+               context.enter(modeSelect(context, [_pointID])); // disallow scrolling
 
-               serializeToString(attr, buf, isHTML, nodeFilter, visibleNamespaces);
-             } // add namespace for current node               
+               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);
+             }
+           });
 
+           function checkPresetSearch() {
+             var first = context.container().select('.preset-list-item:first-child');
 
-             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 (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);
                });
              }
+           }
 
-             if (child || isHTML && !/^(?:meta|link|img|br|hr|input)$/i.test(nodeName)) {
-               buf.push('>'); //if is cdata child node
+           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();
+           }
+         }
 
-               if (isHTML && /^script$/i.test(nodeName)) {
-                 while (child) {
-                   if (child.data) {
-                     buf.push(child.data);
-                   } else {
-                     serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces);
-                   }
+         function aboutFeatureEditor() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return addPoint();
+           }
 
-                   child = child.nextSibling;
-                 }
-               } else {
-                 while (child) {
-                   serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces);
-                   child = child.nextSibling;
-                 }
+           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);
+           });
 
-               buf.push('</', nodeName, '>');
-             } else {
-               buf.push('/>');
-             } // remove added visible namespaces
-             //visibleNamespaces.length = startVisibleNamespaces;
-
-
-             return;
-
-           case DOCUMENT_NODE:
-           case DOCUMENT_FRAGMENT_NODE:
-             var child = node.firstChild;
-
-             while (child) {
-               serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces);
-               child = child.nextSibling;
-             }
-
-             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, "-->");
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }
 
-           case DOCUMENT_TYPE_NODE:
-             var pubid = node.publicId;
-             var sysid = node.systemId;
-             buf.push('<!DOCTYPE ', node.name);
+         function addName() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return addPoint();
+           } // reset pane, in case user happened to change it..
 
-             if (pubid) {
-               buf.push(' PUBLIC "', pubid);
 
-               if (sysid && sysid != '.') {
-                 buf.push('" "', sysid);
-               }
+           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);
 
-               buf.push('">');
-             } else if (sysid && sysid != '.') {
-               buf.push(' SYSTEM "', sysid, '">');
+             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 {
-               var sub = node.internalSubset;
-
-               if (sub) {
-                 buf.push(" [", sub, "]");
-               }
-
-               buf.push(">");
+               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);
+           });
 
-             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.on('exit.intro', null);
+             context.history().on('change.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;
 
-           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;
-         }
+         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 (!node2) {
-           node2 = node.cloneNode(false); //false
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
          }
 
-         node2.ownerDocument = doc;
-         node2.parentNode = null;
+         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..
 
-         if (deep) {
-           var child = node.firstChild;
+           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());
 
-           while (child) {
-             node2.appendChild(_importNode(doc, child, deep));
-             child = child.nextSibling;
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
            }
-         }
-
-         return node2;
-       } //
-       //var _relationMap = {firstChild:1,lastChild:1,previousSibling:1,nextSibling:1,
-       //                                      attributes:1,childNodes:1,parentNode:1,documentElement:1,doctype,};
 
+           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..
 
-       function _cloneNode(doc, node, deep) {
-         var node2 = new node.constructor();
-
-         for (var n in node) {
-           var v = node[n];
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'select') return;
+               continueTo(updatePoint);
+             });
+           }, msec + 100);
 
-           if (_typeof(v) != 'object') {
-             if (v != node2[n]) {
-               node2[n] = v;
-             }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
            }
          }
 
-         if (node.childNodes) {
-           node2.childNodes = new NodeList();
-         }
+         function updatePoint() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return continueTo(reselectPoint);
+           } // reset pane, in case user happened to untag the point..
 
-         node2.ownerDocument = doc;
 
-         switch (node2.nodeType) {
-           case ELEMENT_NODE:
-             var attrs = node.attributes;
-             var attrs2 = node2.attributes = new NamedNodeMap();
-             var len = attrs.length;
-             attrs2._ownerElement = node2;
+           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);
 
-             for (var i = 0; i < len; i++) {
-               node2.setAttributeNode(_cloneNode(doc, attrs.item(i), true));
-             }
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-             break;
+         function updateCloseEditor() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return continueTo(reselectPoint);
+           } // reset pane, in case user happened to change it..
 
-           case ATTRIBUTE_NODE:
-             deep = true;
-         }
 
-         if (deep) {
-           var child = node.firstChild;
+           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);
 
-           while (child) {
-             node2.appendChild(_cloneNode(doc, child, deep));
-             child = child.nextSibling;
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
            }
          }
 
-         return node2;
-       }
+         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
 
-       function __set__(object, key, value) {
-         object[key] = value;
-       } //do dynamic
+           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
+           });
 
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro', null);
+             nextStep();
+           }
+         }
 
-       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));
-                   }
+         function enterDelete() {
+           if (!_pointID) return chapter.restart();
+           var entity = context.hasEntity(_pointID);
+           if (!entity) return chapter.restart();
+           var node = selectMenuItem(context, 'delete').node();
 
-                   node = node.nextSibling;
-                 }
+           if (!node) {
+             return continueTo(rightClickPoint);
+           }
 
-                 return buf.join('');
+           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
 
-               default:
-                 return node.nodeValue;
+           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);
              }
-           };
+           });
 
-           Object.defineProperty(LiveNodeList.prototype, 'length', {
-             get: function get() {
-               _updateLiveList(this);
+           function continueTo(nextStep) {
+             context.map().on('move.intro', null);
+             context.history().on('change.intro', null);
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }
 
-               return this.$$length;
-             }
+         function undo() {
+           context.history().on('change.intro', function () {
+             continueTo(play);
            });
-           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));
-                   }
+           reveal('.top-toolbar button.undo-button', helpHtml('intro.points.undo'));
 
-                   break;
+           function continueTo(nextStep) {
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-                 default:
-                   //TODO:
-                   this.data = data;
-                   this.value = data;
-                   this.nodeValue = data;
-               }
+         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');
              }
            });
-
-           __set__ = function __set__(object, key, value) {
-             //console.log(value)
-             object['$$' + key] = value;
-           };
          }
-       } catch (e) {//ie8
-       } //if(typeof require == 'function'){
 
+         chapter.enter = function () {
+           addPoint();
+         };
 
-       var DOMImplementation_1 = DOMImplementation;
-       var XMLSerializer_1 = XMLSerializer$1; //}
-
-       var dom = {
-         DOMImplementation: DOMImplementation_1,
-         XMLSerializer: XMLSerializer_1
-       };
+         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);
+         };
 
-       var domParser = createCommonjsModule(function (module, exports) {
-         function DOMParser(options) {
-           this.options = options || {
-             locator: {}
-           };
-         }
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };
 
-         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': "'"
-           };
+         return utilRebind(chapter, dispatch, 'on');
+       }
 
-           if (locator) {
-             domBuilder.setDocumentLocator(locator);
-           }
+       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 = [];
 
-           sax.errorHandler = buildErrorHandler(errorHandler, domBuilder, locator);
-           sax.domBuilder = options.domBuilder || domBuilder;
+         var _areaID;
 
-           if (/\/x?html?$/.test(mimeType)) {
-             entityMap.nbsp = '\xa0';
-             entityMap.copy = '\xa9';
-             defaultNSMap[''] = 'http://www.w3.org/1999/xhtml';
-           }
+         var chapter = {
+           title: 'intro.areas.title'
+         };
 
-           defaultNSMap.xml = defaultNSMap.xml || 'http://www.w3.org/XML/1998/namespace';
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
+         }
 
-           if (source) {
-             sax.parse(source, defaultNSMap, entityMap);
-           } else {
-             sax.errorHandler.error("invalid doc source");
-           }
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+         }
 
-           return domBuilder.doc;
-         };
+         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);
+         }
 
-         function buildErrorHandler(errorImpl, domBuilder, locator) {
-           if (!errorImpl) {
-             if (domBuilder instanceof DOMHandler) {
-               return domBuilder;
-             }
+         function addArea() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           _areaID = null;
+           var msec = transitionTime(playground, context.map().center());
 
-             errorImpl = domBuilder;
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
            }
 
-           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.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);
 
-             errorHandler[key] = fn && function (msg) {
-               fn('[xmldom ' + key + ']\t' + msg + _locator(locator));
-             } || function () {};
+           function continueTo(nextStep) {
+             context.on('enter.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 startPlayground() {
+           if (context.mode().id !== 'add-area') {
+             return chapter.restart();
+           }
 
-         function DOMHandler() {
-           this.cdata = false;
-         }
+           _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
 
-         function position(locator, node) {
-           node.lineNumber = locator.lineNumber;
-           node.columnNumber = locator.columnNumber;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
          }
-         /**
-          * @see org.xml.sax.ContentHandler#startDocument
-          * @link http://www.saxproject.org/apidoc/org/xml/sax/ContentHandler.html
-          */
 
+         function continuePlayground() {
+           if (context.mode().id !== 'draw-area') {
+             return chapter.restart();
+           }
 
-         DOMHandler.prototype = {
-           startDocument: function startDocument() {
-             this.doc = new DOMImplementation().createDocument(null, null, null);
+           _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
 
-             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);
-             }
-           },
-           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)
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'draw-area') {
+               var entity = context.hasEntity(context.selectedIDs()[0]);
 
-             if (chars) {
-               if (this.cdata) {
-                 var charNode = this.doc.createCDATASection(chars);
+               if (entity && entity.nodes.length >= 6) {
+                 return continueTo(finishPlayground);
                } else {
-                 var charNode = this.doc.createTextNode(chars);
-               }
-
-               if (this.currentElement) {
-                 this.currentElement.appendChild(charNode);
-               } else if (/^\s*$/.test(chars)) {
-                 this.doc.appendChild(charNode); //process xml
+                 return;
                }
-
-               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) + '';
+             } else if (mode.id === 'select') {
+               _areaID = context.selectedIDs()[0];
+               return continueTo(searchPresets);
+             } else {
+               return chapter.restart();
              }
+           });
 
-             return chars;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.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 finishPlayground() {
+           if (context.mode().id !== 'draw-area') {
+             return chapter.restart();
            }
-         } //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;
+           _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
 
-             for (var i = 0, h = 0; i < x.length; i++) {
-               h = (h << 5) - h + x.charCodeAt(i) | 0;
+           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();
              }
+           });
 
-             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.on('enter.intro', null);
+             nextStep();
            }
+         }
 
-           function attr(x, y) {
-             return x.getAttribute(y);
+         function searchPresets() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
            }
 
-           function attrf(x, y) {
-             return parseFloat(attr(x, y));
-           } // one Y child of X, if any, otherwise null
+           var ids = context.selectedIDs();
 
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             context.enter(modeSelect(context, [_areaID]));
+           } // disallow scrolling
 
-           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
 
+           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..
 
-           function norm(el) {
-             if (el.normalize) {
-               el.normalize();
+           context.on('enter.intro', function (mode) {
+             if (!_areaID || !context.hasEntity(_areaID)) {
+               return continueTo(addArea);
              }
 
-             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 ids = context.selectedIDs();
 
-             return o;
-           } // get the content of a text node, if any
+             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 nodeVal(x) {
-             if (x) {
-               norm(x);
+               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);
              }
+           });
 
-             return x && x.textContent || '';
-           } // get the contents of multiple text nodes, if present
-
-
-           function getMulti(x, ys) {
-             var o = {},
-                 n,
-                 k;
+           function checkPresetSearch() {
+             var first = context.container().select('.preset-list-item:first-child');
 
-             for (k = 0; k < ys.length; k++) {
-               n = get1(x, ys[k]);
-               if (n) o[ys[k]] = nodeVal(n);
+             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);
+               });
              }
+           }
 
-             return o;
-           } // add properties of Y to X, overwriting if present in both
+           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 clickAddField() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
+           }
 
-           function extend(x, y) {
-             for (var k in y) {
-               x[k] = y[k];
-             }
-           } // get one coordinate from a coordinate array, if any
+           var ids = context.selectedIDs();
 
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             return searchPresets();
+           }
 
-           function coord1(v) {
-             return numarray(v.replace(removeSpace, '').split(','));
-           } // get all coordinates from a coordinate array as [[],[]]
+           if (!context.container().select('.form-field-description').empty()) {
+             return continueTo(describePlayground);
+           } // disallow scrolling
 
 
-           function coord(v) {
-             var coords = v.replace(trimSpace, '').split(splitSpace),
-                 o = [];
+           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.
 
-             for (var i = 0; i < coords.length; i++) {
-               o.push(coord1(coords[i]));
-             }
+             var entity = context.entity(_areaID);
 
-             return o;
-           }
+             if (entity.tags.description) {
+               return continueTo(play);
+             } // scroll "Add field" into view
 
-           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;
 
-             if (ele) {
-               e = parseFloat(nodeVal(ele));
+             var box = context.container().select('.more-fields').node().getBoundingClientRect();
 
-               if (!isNaN(e)) {
-                 ll.push(e);
-               }
+             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 {
-               coordinates: ll,
-               time: time ? nodeVal(time) : null,
-               heartRate: heartRate ? parseFloat(nodeVal(heartRate)) : null
-             };
-           } // create a new feature collection parent object
+             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
 
+           context.on('exit.intro', function () {
+             return continueTo(searchPresets);
+           });
 
-           function fc() {
-             return {
-               type: 'FeatureCollection',
-               features: []
-             };
+           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();
            }
+         }
 
-           var serializer;
-
-           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 chooseDescriptionField() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
            }
 
-           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
+           var ids = context.selectedIDs();
 
-             /* istanbul ignore next */
-             if (str.xml !== undefined) return str.xml;
-             return serializer.serializeToString(str);
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             return searchPresets();
            }
 
-           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]));
-               }
+           if (!context.container().select('.form-field-description').empty()) {
+             return continueTo(describePlayground);
+           } // Make sure combobox is ready..
 
-               function kmlColor(v) {
-                 var color, opacity;
-                 v = v || '';
 
-                 if (v.substr(0, 1) === '#') {
-                   v = v.substr(1);
-                 }
+           if (context.container().select('div.combobox').empty()) {
+             return continueTo(clickAddField);
+           } // Watch for the combobox to go away..
 
-                 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);
+           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.
+             }
+           }, 300);
+           reveal('div.combobox', helpHtml('intro.areas.choose_field', {
+             field: {
+               html: descriptionField.label()
+             }
+           }), {
+             duration: 300
+           });
+           context.on('exit.intro', function () {
+             return continueTo(searchPresets);
+           });
 
-                 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])));
-                 }
+           function continueTo(nextStep) {
+             if (watcher) window.clearInterval(watcher);
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }
 
-                 var timeElems = get(root, 'when');
+         function describePlayground() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
+           }
 
-                 for (var j = 0; j < timeElems.length; j++) {
-                   times.push(nodeVal(timeElems[j]));
-                 }
+           var ids = context.selectedIDs();
 
-                 return {
-                   coords: coords,
-                   times: times
-                 };
-               }
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             return searchPresets();
+           } // reset pane, in case user happened to change it..
 
-               function getGeometry(root) {
-                 var geomNode,
-                     geomNodes,
-                     i,
-                     j,
-                     k,
-                     geoms = [],
-                     coordTimes = [];
 
-                 if (get1(root, 'MultiGeometry')) {
-                   return getGeometry(get1(root, 'MultiGeometry'));
-                 }
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
 
-                 if (get1(root, 'MultiTrack')) {
-                   return getGeometry(get1(root, 'MultiTrack'));
-                 }
+           if (context.container().select('.form-field-description').empty()) {
+             return continueTo(retryChooseDescription);
+           }
 
-                 if (get1(root, 'gx:MultiTrack')) {
-                   return getGeometry(get1(root, 'gx:MultiTrack'));
-                 }
+           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
+           });
 
-                 for (i = 0; i < geotypes.length; i++) {
-                   geomNodes = get(root, geotypes[i]);
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }
 
-                   if (geomNodes) {
-                     for (j = 0; j < geomNodes.length; j++) {
-                       geomNode = geomNodes[j];
+         function retryChooseDescription() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
+           }
 
-                       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 = [];
+           var ids = context.selectedIDs();
 
-                         for (k = 0; k < rings.length; k++) {
-                           coords.push(coord(nodeVal(get1(rings[k], 'coordinates'))));
-                         }
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             return searchPresets();
+           } // reset pane, in case user happened to change it..
 
-                         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
-                 };
-               }
+           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);
+           });
 
-               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;
-                   }
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }
 
-                   properties.styleUrl = styleUrl;
+         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 (styleIndex[styleUrl]) {
-                     properties.styleHash = styleIndex[styleUrl];
-                   }
+         chapter.enter = function () {
+           addArea();
+         };
 
-                   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
+         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();
+         };
 
-                   var style = styleByHash[properties.styleHash];
+         return utilRebind(chapter, dispatch, 'on');
+       }
 
-                   if (style) {
-                     if (!lineStyle) lineStyle = get1(style, 'LineStyle');
-                     if (!polyStyle) polyStyle = get1(style, 'PolyStyle');
-                   }
-                 }
+       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'
+         };
 
-                 if (description) properties.description = description;
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
+         }
 
-                 if (timeSpan) {
-                   var begin = nodeVal(get1(timeSpan, 'begin'));
-                   var end = nodeVal(get1(timeSpan, 'end'));
-                   properties.timespan = {
-                     begin: begin,
-                     end: end
-                   };
-                 }
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+         }
 
-                 if (timeStamp) {
-                   properties.timestamp = nodeVal(get1(timeStamp, 'when'));
-                 }
+         function addLine() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           var msec = transitionTime(tulipRoadStart, context.map().center());
 
-                 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 (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }
 
-                 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;
-                 }
+           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 (extendedData) {
-                   var datas = get(extendedData, 'Data'),
-                       simpleDatas = get(extendedData, 'SimpleData');
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-                   for (i = 0; i < datas.length; i++) {
-                     properties[datas[i].getAttribute('name')] = nodeVal(get1(datas[i], 'value'));
-                   }
+         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);
+           });
 
-                   for (i = 0; i < simpleDatas.length; i++) {
-                     properties[simpleDatas[i].getAttribute('name')] = nodeVal(simpleDatas[i]);
-                   }
-                 }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-                 if (visibility) {
-                   properties.visibility = nodeVal(visibility);
-                 }
+         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 (geomsAndTimes.coordTimes.length) {
-                   properties.coordTimes = geomsAndTimes.coordTimes.length === 1 ? geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes;
-                 }
+           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 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 continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-               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);
-               }
+         function isLineConnected() {
+           var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
 
-               for (i = 0; i < routes.length; i++) {
-                 feature = getRoute(routes[i]);
-                 if (feature) gj.features.push(feature);
-               }
+           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;
+             });
+           });
+         }
 
-               for (i = 0; i < waypoints.length; i++) {
-                 gj.features.push(getPoint(waypoints[i]));
-               }
+         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);
+         }
 
-               function getPoints(node, pointname) {
-                 var pts = get(node, pointname),
-                     line = [],
-                     times = [],
-                     heartRates = [],
-                     l = pts.length;
-                 if (l < 2) return {}; // Invalid line in GeoJSON
+         function continueLine() {
+           if (context.mode().id !== 'draw-line') return chapter.restart();
 
-                 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);
-                 }
+           var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
 
-                 return {
-                   line: line,
-                   times: times,
-                   heartRates: heartRates
-                 };
-               }
+           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();
+             }
+           });
 
-               function getTrack(node) {
-                 var segments = get(node, 'trkseg'),
-                     track = [],
-                     times = [],
-                     heartRates = [],
-                     line;
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-                 for (var i = 0; i < segments.length; i++) {
-                   line = getPoints(segments[i], 'trkpt');
+         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 (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);
-                   }
-                 }
+           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 (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 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 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;
-               }
+         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 getPoint(node) {
-                 var prop = getProperties(node);
-                 extend(prop, getMulti(node, ['sym']));
-                 return {
-                   type: 'Feature',
-                   properties: prop,
-                   geometry: {
-                     type: 'Point',
-                     coordinates: coordPair(node).coordinates
-                   }
-                 };
-               }
+           function continueTo(nextStep) {
+             context.container().select('.preset-list-button').on('click.intro', null);
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         } // selected wrong road type
 
-               function getLineStyle(extensions) {
-                 var style = {};
 
-                 if (extensions) {
-                   var lineStyle = get1(extensions, 'line');
+         function retryPresetResidential() {
+           if (context.mode().id !== 'select') return chapter.restart();
+           context.on('exit.intro', function () {
+             return chapter.restart();
+           }); // disallow scrolling
 
-                   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
+           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);
 
-                     if (!isNaN(width)) style['stroke-width'] = width * 96 / 25.4;
-                   }
-                 }
+           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 style;
+         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 getProperties(node) {
-                 var prop = getMulti(node, ['name', 'cmt', 'desc', 'type', 'time', 'keywords']),
-                     links = get(node, 'link');
-                 if (links.length) prop.links = [];
-
-                 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);
-                 }
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }
 
-                 return prop;
+         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);
 
-               return gj;
-             }
-           };
-           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);
+           function continueTo(nextStep) {
+             nextStep();
+           }
+         }
 
-         var _showLabels = true;
-         var detected = utilDetect();
-         var layer = select(null);
+         function updateLine() {
+           context.history().reset('doneAddLine');
 
-         var _vtService;
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return chapter.restart();
+           }
 
-         var _fileList;
+           var msec = transitionTime(woodRoadDragMidpoint, context.map().center());
 
-         var _template;
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }
 
-         var _src;
+           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 init() {
-           if (_initialized) return; // run once
+             var advance = function advance() {
+               continueTo(addNode);
+             };
 
-           _geojson = {};
-           _enabled = true;
+             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);
 
-           function over(d3_event) {
-             d3_event.stopPropagation();
-             d3_event.preventDefault();
-             d3_event.dataTransfer.dropEffect = 'copy';
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.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 addNode() {
+           context.history().reset('doneAddLine');
 
-             _vtService.event.on('loadedData', throttledRedraw);
-           } else if (!services.vectorTile && _vtService) {
-             _vtService = null;
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return chapter.restart();
            }
 
-           return _vtService;
-         }
-
-         function showLayer() {
-           layerOn();
-           layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
-             dispatch.call('change');
+           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);
+             }
 
-         function hideLayer() {
-           throttledRedraw.cancel();
-           layer.transition().duration(250).style('opacity', 0).on('end', layerOff);
-         }
+             if (changed.created().length === 1) {
+               timeout(function () {
+                 continueTo(startDragEndpoint);
+               }, 500);
+             }
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id !== 'select') {
+               continueTo(updateLine);
+             }
+           });
 
-         function layerOn() {
-           layer.style('display', 'block');
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             context.on('enter.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 startDragEndpoint() {
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return continueTo(updateLine);
+           }
 
+           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);
+             }
 
-         function ensureIDs(gj) {
-           if (!gj) return null;
+             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 (gj.type === 'FeatureCollection') {
-             for (var i = 0; i < gj.features.length; i++) {
-               ensureFeatureID(gj.features[i]);
+             if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
+               continueTo(finishDragEndpoint);
              }
-           } else {
-             ensureFeatureID(gj);
-           }
+           });
 
-           return gj;
-         } // ensure that each single Feature object has a unique ID
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
+           }
+         }
 
+         function finishDragEndpoint() {
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return continueTo(updateLine);
+           }
 
-         function ensureFeatureID(feature) {
-           if (!feature) return;
-           feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
-           return feature;
-         } // Prefer an array of Features instead of a FeatureCollection
+           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);
+             }
 
+             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);
 
-         function getFeatures(gj) {
-           if (!gj) return [];
+             if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
+               continueTo(startDragEndpoint);
+             }
+           });
+           context.on('enter.intro', function () {
+             continueTo(startDragMidpoint);
+           });
 
-           if (gj.type === 'FeatureCollection') {
-             return gj.features;
-           } else {
-             return [gj];
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
            }
          }
 
-         function featureKey(d) {
-           return d.__featurehash__;
-         }
-
-         function isPolygon(d) {
-           return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
-         }
-
-         function clipPathID(d) {
-           return 'ideditor-data-' + d.__featurehash__ + '-clippath';
-         }
+         function startDragMidpoint() {
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return continueTo(updateLine);
+           }
 
-         function featureClasses(d) {
-           return ['data' + d.__featurehash__, d.geometry.type, isPolygon(d) ? 'area' : '', d.__layerID__ || ''].filter(Boolean).join(' ');
-         }
+           if (context.selectedIDs().indexOf(woodRoadID) === -1) {
+             context.enter(modeSelect(context, [woodRoadID]));
+           }
 
-         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 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);
+             }
 
-           var geoData, polygonData;
+             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]));
+             }
+           });
 
-           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);
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
            }
+         }
 
-           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
+         function continueDragMidpoint() {
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return continueTo(updateLine);
+           }
 
-           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 padding = 100 * Math.pow(2, context.map().zoom() - 19);
+           var box = pad(woodRoadDragEndpoint, padding, context);
+           box.height += 400;
 
-           var pathData = {
-             fill: polygonData,
-             shadow: geoData,
-             stroke: geoData
+           var advance = function advance() {
+             context.history().checkpoint('doneUpdateLine');
+             continueTo(deleteLines);
            };
-           var paths = datagroups.selectAll('path').data(function (layer) {
-             return pathData[layer];
-           }, featureKey); // exit
 
-           paths.exit().remove(); // enter/update
+           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);
+             }
 
-           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 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
+             });
+           });
 
-           layer.call(drawLabels, 'label-halo', geoData).call(drawLabels, 'label', geoData);
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
+           }
+         }
 
-           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);
+         function deleteLines() {
+           context.history().reset('doneUpdateLine');
+           context.enter(modeBrowse(context));
+
+           if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return chapter.restart();
+           }
+
+           var msec = transitionTime(deleteLinesLoc, context.map().center());
+
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
              });
-             var labels = selection.selectAll('text.' + textClass).data(labelData, featureKey); // exit
+           }
 
-             labels.exit().remove(); // enter/update
+           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;
 
-             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];
+             var advance = function advance() {
+               continueTo(rightClickIntersection);
+             };
+
+             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);
+
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.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 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);
 
-         function xmlToDom(textdata) {
-           return new DOMParser().parseFromString(textdata, 'text/xml');
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
          }
 
-         drawData.setFile = function (extension, data) {
-           _template = null;
-           _fileList = null;
-           _geojson = null;
-           _src = null;
-           var gj;
-
-           switch (extension) {
-             case '.gpx':
-               gj = togeojson.gpx(xmlToDom(data));
-               break;
+         function splitIntersection() {
+           if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(deleteLines);
+           }
 
-             case '.kml':
-               gj = togeojson.kml(xmlToDom(data));
-               break;
+           var node = selectMenuItem(context, 'split').node();
 
-             case '.geojson':
-             case '.json':
-               gj = JSON.parse(data);
-               break;
+           if (!node) {
+             return continueTo(rightClickIntersection);
            }
 
-           gj = gj || {};
+           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();
 
-           if (Object.keys(gj).length) {
-             _geojson = ensureIDs(gj);
-             _src = extension + ' data file';
-             this.fitZoom();
+             if (!wasChanged && !node) {
+               return continueTo(rightClickIntersection);
+             }
+
+             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)
+           });
+
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
+         }
 
-           dispatch.call('change');
-           return this;
-         };
+         function retrySplit() {
+           context.enter(modeBrowse(context));
+           context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
 
-         drawData.showLabels = function (val) {
-           if (!arguments.length) return _showLabels;
-           _showLabels = val;
-           return this;
-         };
+           var advance = function advance() {
+             continueTo(rightClickIntersection);
+           };
 
-         drawData.enabled = function (val) {
-           if (!arguments.length) return _enabled;
-           _enabled = val;
+           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 (_enabled) {
-             showLayer();
-           } else {
-             hideLayer();
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
            }
+         }
 
-           dispatch.call('change');
-           return this;
-         };
+         function didSplit() {
+           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(rightClickIntersection);
+           }
 
-         drawData.hasData = function () {
-           var gj = _geojson || {};
-           return !!(_template || Object.keys(gj).length);
-         };
+           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
 
-         drawData.template = function (val, src) {
-           if (!arguments.length) return _template; // test source against OSM imagery blocklists..
+           context.on('enter.intro', function () {
+             var ids = context.selectedIDs();
 
-           var osm = context.connection();
+             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);
+             }
+           });
 
-           if (osm) {
-             var blocklists = osm.imageryBlocklists();
-             var fail = false;
-             var tested = 0;
-             var regex;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-             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.
+         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 (!tested) {
-               regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
-               fail = regex.test(val);
-             }
+           if (hasWashington && hasTwelfth) {
+             return continueTo(multiRightClick);
+           } else if (!hasWashington && !hasTwelfth) {
+             return continueTo(didSplit);
            }
 
-           _template = val;
-           _fileList = null;
-           _geojson = null; // strip off the querystring/hash from the template,
-           // it often includes the access token
+           context.map().centerZoomEase(twelfthAvenue, 18, 500);
+           timeout(function () {
+             var selected, other, padding, box;
 
-           _src = src || 'vectortile:' + val.split(/[?#]/)[0];
-           dispatch.call('change');
-           return this;
-         };
+             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;
+             }
 
-         drawData.geojson = function (gj, src) {
-           if (!arguments.length) return _geojson;
-           _template = null;
-           _fileList = null;
-           _geojson = null;
-           _src = null;
-           gj = gj || {};
+             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 {
+                 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 (Object.keys(gj).length) {
-             _geojson = ensureIDs(gj);
-             _src = src || 'unknown.geojson';
-           }
+               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);
 
-           dispatch.call('change');
-           return this;
-         };
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-         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();
+         function multiRightClick() {
+           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(rightClickIntersection);
+           }
 
-           reader.onload = function () {
-             return function (e) {
-               drawData.setFile(extension, e.target.result);
-             };
-           }();
+           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();
 
-           reader.readAsText(f);
-           return this;
-         };
+               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);
+             }
+           });
 
-         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.map().on('move.intro drawn.intro', null);
+             context.ui().editMenu().on('toggled.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-           var testUrl = url.split(/[?#]/)[0];
-           var extension = getExtension(testUrl) || defaultExtension;
+         function multiDelete() {
+           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(rightClickIntersection);
+           }
 
-           if (extension) {
-             _template = null;
-             d3_text(url).then(function (data) {
-               drawData.setFile(extension, data);
-             })["catch"](function () {
-               /* ignore */
+           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
              });
-           } else {
-             drawData.template(url);
+           });
+           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);
+             }
+           });
+
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
+         }
 
-           return this;
-         };
+         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);
+             }
+           });
 
-         drawData.getSrc = function () {
-           return _src || '';
-         };
+           function continueTo(nextStep) {
+             nextStep();
+           }
+         }
 
-         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 */
+         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');
+             }
+           });
+         }
 
-             switch (geom.type) {
-               case 'Point':
-                 c = [c];
+         chapter.enter = function () {
+           addLine();
+         };
 
-               case 'MultiPoint':
-               case 'LineString':
-                 break;
+         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);
+         };
 
-               case 'MultiPolygon':
-                 c = utilArrayFlatten(c);
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };
 
-               case 'Polygon':
-               case 'MultiLineString':
-                 c = utilArrayFlatten(c);
-                 break;
-             }
-             /* eslint-enable no-fallthrough */
+         return utilRebind(chapter, dispatch, 'on');
+       }
 
+       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'
+         };
 
-             return utilArrayUnion(coords, c);
-           }, []);
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
+         }
 
-           if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
-             var extent = geoExtent(d3_geoBounds({
-               type: 'LineString',
-               coordinates: coords
-             }));
-             map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
-           }
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+         }
 
-           return this;
-         };
+         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);
+         }
 
-         init();
-         return drawData;
-       }
+         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 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 addHouse() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           _houseID = null;
+           var msec = transitionTime(house, context.map().center());
 
-           if (showTile) {
-             debugData.push({
-               "class": 'red',
-               label: 'tile'
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
              });
            }
 
-           if (showCollision) {
-             debugData.push({
-               "class": 'yellow',
-               label: 'collision'
+           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 (showImagery) {
-             debugData.push({
-               "class": 'orange',
-               label: 'imagery'
-             });
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
            }
+         }
 
-           if (showTouchTargets) {
-             debugData.push({
-               "class": 'pink',
-               label: 'touchTargets'
-             });
+         function startHouse() {
+           if (context.mode().id !== 'add-area') {
+             return continueTo(addHouse);
            }
 
-           if (showDownloaded) {
-             debugData.push({
-               "class": 'purple',
-               label: 'downloaded'
+           _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
+               });
              });
-           }
-
-           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 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];
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'draw-area') return chapter.restart();
+               continueTo(continueHouse);
              });
-             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
-
-           var osm = context.connection();
-           var dataDownloaded = [];
+           }, 550); // after easing
 
-           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]]]
-                 }
-               };
-             });
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
            }
+         }
 
-           var downloaded = layer.selectAll('path.debug-downloaded').data(showDownloaded ? dataDownloaded : []);
-           downloaded.exit().remove();
-           downloaded.enter().append('path').attr('class', 'debug-downloaded debug purple'); // update
-
-           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.
-
-
-         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;
+         function continueHouse() {
+           if (context.mode().id !== 'draw-area') {
+             return continueTo(addHouse);
            }
-         };
-
-         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);
+           _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);
+               });
 
-         var _spritesheetIds = ['iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'community-sprite'];
+               if (isMostlySquare(points)) {
+                 _houseID = way.id;
+                 return continueTo(chooseCategoryBuilding);
+               } else {
+                 return continueTo(retryHouse);
+               }
+             } else {
+               return chapter.restart();
+             }
+           });
 
-         function drawDefs(selection) {
-           _defsSelection = selection.append('defs'); // add markers
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-           _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 retryHouse() {
+           var onClick = function onClick() {
+             continueTo(addHouse);
+           };
 
+           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 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);
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
            }
+         }
 
-           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
+         function chooseCategoryBuilding() {
+           if (!_houseID || !context.hasEntity(_houseID)) {
+             return addHouse();
+           }
 
-           addSidedMarker('coastline', '#77dede', 1);
-           addSidedMarker('waterway', '#77dede', 1); // barriers have a dashed line, and separating the triangle
-           // from the line visually suits that
+           var ids = context.selectedIDs();
 
-           addSidedMarker('barrier', '#ddd', 1);
-           addSidedMarker('man_made', '#fff', 0);
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+             context.enter(modeSelect(context, [_houseID]));
+           } // disallow scrolling
 
-           _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');
 
-           _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
+           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..
 
+           context.on('enter.intro', function (mode) {
+             if (!_houseID || !context.hasEntity(_houseID)) {
+               return continueTo(addHouse);
+             }
 
-           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');
+             var ids = context.selectedIDs();
 
-           patterns.append('rect').attr('x', 0).attr('y', 0).attr('width', 32).attr('height', 32).attr('class', function (d) {
-             return 'pattern-color-' + d[0];
+             if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+               return continueTo(chooseCategoryBuilding);
+             }
            });
-           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
-
-           _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
-
 
-           addSprites(_spritesheetIds, true);
+           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 addSprites(ids, overrideColors) {
-           _spritesheetIds = utilArrayUniq(_spritesheetIds.concat(ids));
+         function choosePresetHouse() {
+           if (!_houseID || !context.hasEntity(_houseID)) {
+             return addHouse();
+           }
 
-           var spritesheets = _defsSelection.selectAll('.spritesheet').data(_spritesheetIds);
+           var ids = context.selectedIDs();
 
-           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 (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+             context.enter(modeSelect(context, [_houseID]));
+           } // disallow scrolling
 
-               if (overrideColors && d !== 'iD-sprite') {
-                 // allow icon colors to be overridden..
-                 select(node).selectAll('path').attr('fill', 'currentColor');
-               }
-             })["catch"](function () {
-               /* ignore */
+
+           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
              });
-           });
-           spritesheets.exit().remove();
-         }
+             button.on('click.intro', function () {
+               button.on('click.intro', null);
+               continueTo(closeEditorHouse);
+             });
+           }, 400); // after preset list pane visible..
 
-         drawDefs.addSprites = addSprites;
-         return drawDefs;
-       }
+           context.on('enter.intro', function (mode) {
+             if (!_houseID || !context.hasEntity(_houseID)) {
+               return continueTo(addHouse);
+             }
 
-       var _layerEnabled = false;
+             var ids = context.selectedIDs();
 
-       var _qaService;
+             if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+               return continueTo(chooseCategoryBuilding);
+             }
+           });
 
-       function svgKeepRight(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           return dispatch.call('change');
-         }, 1000);
+           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 minZoom = 12;
-         var touchLayer = select(null);
-         var drawLayer = select(null);
-         var layerVisible = false;
+         function closeEditorHouse() {
+           if (!_houseID || !context.hasEntity(_houseID)) {
+             return addHouse();
+           }
 
-         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 ids = context.selectedIDs();
 
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+             context.enter(modeSelect(context, [_houseID]));
+           }
 
-         function getService() {
-           if (services.keepRight && !_qaService) {
-             _qaService = services.keepRight;
+           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);
 
-             _qaService.on('loaded', throttledRedraw);
-           } else if (!services.keepRight && _qaService) {
-             _qaService = null;
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
            }
+         }
 
-           return _qaService;
-         } // Show the markers
-
+         function rightClickHouse() {
+           if (!_houseID) return chapter.restart();
+           context.enter(modeBrowse(context));
+           context.history().reset('hasHouse');
+           var zoom = context.map().zoom();
 
-         function editOn() {
-           if (!layerVisible) {
-             layerVisible = true;
-             drawLayer.style('display', 'block');
+           if (zoom < 20) {
+             zoom = 20;
            }
-         } // Immediately remove the markers and their touch targets
 
+           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 editOff() {
-           if (layerVisible) {
-             layerVisible = false;
-             drawLayer.style('display', 'none');
-             drawLayer.selectAll('.qaItem.keepRight').remove();
-             touchLayer.selectAll('.qaItem.keepRight').remove();
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
-         } // Enable the layer.  This shows the markers and transitions them to visible.
+         }
+
+         function clickSquare() {
+           if (!_houseID) return chapter.restart();
+           var entity = context.hasEntity(_houseID);
+           if (!entity) return continueTo(rightClickHouse);
+           var node = selectMenuItem(context, 'orthogonalize').node();
 
+           if (!node) {
+             return continueTo(rightClickHouse);
+           }
 
-         function layerOn() {
-           editOn();
-           drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
-             return dispatch.call('change');
+           var wasChanged = false;
+           reveal('.edit-menu', helpHtml('intro.buildings.square_building'), {
+             padding: 50
            });
-         } // Disable the layer.  This transitions the layer invisible and then hides the markers.
+           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();
 
+             if (!wasChanged && !node) {
+               return continueTo(rightClickHouse);
+             }
 
-         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');
+             reveal('.edit-menu', helpHtml('intro.buildings.square_building'), {
+               duration: 0,
+               padding: 50
+             });
            });
-         } // Update the issue markers
+           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.
 
+             timeout(function () {
+               if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature', {
+                 n: 1
+               })) {
+                 continueTo(doneSquare);
+               } else {
+                 continueTo(retryClickSquare);
+               }
+             }, 500); // after transitioned actions
+           });
 
-         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 continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-           var markers = drawLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
-             return d.id;
-           }); // exit
+         function retryClickSquare() {
+           context.enter(modeBrowse(context));
+           revealHouse(house, helpHtml('intro.buildings.retry_square'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               continueTo(rightClickHouse);
+             }
+           });
 
-           markers.exit().remove(); // enter
+           function continueTo(nextStep) {
+             nextStep();
+           }
+         }
 
-           var markersEnter = markers.enter().append('g').attr('class', function (d) {
-             return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.parentIssueType);
+         function doneSquare() {
+           context.history().checkpoint('doneSquare');
+           revealHouse(house, helpHtml('intro.buildings.done_square'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               continueTo(addTank);
+             }
            });
-           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
 
-           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
-             return d.id === selectedID;
-           }).attr('transform', getTransform); // Draw targets..
+           function continueTo(nextStep) {
+             nextStep();
+           }
+         }
 
-           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
+         function addTank() {
+           context.enter(modeBrowse(context));
+           context.history().reset('doneSquare');
+           _tankID = null;
+           var msec = transitionTime(tank, context.map().center());
 
-           targets.exit().remove(); // enter/update
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }
 
-           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);
+           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);
 
-           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];
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
            }
-         } // Draw the keepRight layer and schedule loading issues and updating markers.
+         }
 
+         function startTank() {
+           if (context.mode().id !== 'add-area') {
+             return continueTo(addTank);
+           }
 
-         function drawKeepRight(selection) {
-           var service = getService();
-           var surface = context.surface();
+           _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
 
-           if (surface && !surface.empty()) {
-             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
            }
+         }
 
-           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 continueTank() {
+           if (context.mode().id !== 'draw-area') {
+             return continueTo(addTank);
+           }
 
-           if (_layerEnabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               service.loadIssues(projection);
-               updateMarkers();
+           _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 {
-               editOff();
+               return continueTo(addTank);
              }
-           }
-         } // Toggles the layer on and off
-
-
-         drawKeepRight.enabled = function (val) {
-           if (!arguments.length) return _layerEnabled;
-           _layerEnabled = val;
-
-           if (_layerEnabled) {
-             layerOn();
-           } else {
-             layerOff();
+           });
 
-             if (context.selectedErrorID()) {
-               context.enter(modeBrowse(context));
-             }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
            }
+         }
 
-           dispatch.call('change');
-           return this;
-         };
-
-         drawKeepRight.supported = function () {
-           return !!getService();
-         };
-
-         return drawKeepRight;
-       }
-
-       function svgGeolocate(projection) {
-         var layer = select(null);
-
-         var _position;
+         function searchPresetTank() {
+           if (!_tankID || !context.hasEntity(_tankID)) {
+             return addTank();
+           }
 
-         function init() {
-           if (svgGeolocate.initialized) return; // run once
+           var ids = context.selectedIDs();
 
-           svgGeolocate.enabled = false;
-           svgGeolocate.initialized = true;
-         }
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+             context.enter(modeSelect(context, [_tankID]));
+           } // disallow scrolling
 
-         function showLayer() {
-           layer.style('display', 'block');
-         }
 
-         function hideLayer() {
-           layer.transition().duration(250).style('opacity', 0);
-         }
+           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..
 
-         function layerOn() {
-           layer.style('opacity', 0).transition().duration(250).style('opacity', 1);
-         }
+           context.on('enter.intro', function (mode) {
+             if (!_tankID || !context.hasEntity(_tankID)) {
+               return continueTo(addTank);
+             }
 
-         function layerOff() {
-           layer.style('display', 'none');
-         }
+             var ids = context.selectedIDs();
 
-         function transform(d) {
-           return svgPointTransform(projection)(d);
-         }
+             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..
 
-         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...
+               context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
 
-           return Math.round(projectedLoc[1] - projectedTangent[1]).toString();
-         }
+               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);
+             }
+           });
 
-         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 checkPresetSearch() {
+             var first = context.container().select('.preset-list-item:first-child');
 
-         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 (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);
+               });
+             }
+           }
 
-           if (enabled) {
-             update();
-           } else {
-             layerOff();
+           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();
            }
          }
 
-         drawLocation.enabled = function (position, enabled) {
-           if (!arguments.length) return svgGeolocate.enabled;
-           _position = position;
-           svgGeolocate.enabled = enabled;
-
-           if (svgGeolocate.enabled) {
-             showLayer();
-             layerOn();
-           } else {
-             hideLayer();
+         function closeEditorTank() {
+           if (!_tankID || !context.hasEntity(_tankID)) {
+             return addTank();
            }
 
-           return this;
-         };
-
-         init();
-         return drawLocation;
-       }
-
-       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 ids = context.selectedIDs();
 
-         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]];
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+             context.enter(modeSelect(context, [_tankID]));
+           }
 
-         function shouldSkipIcon(preset) {
-           var noIcons = ['building', 'landuse', 'natural'];
-           return noIcons.some(function (s) {
-             return preset.id.indexOf(s) >= 0;
+           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);
 
-         function get(array, prop) {
-           return function (d, i) {
-             return array[i][prop];
-           };
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
          }
 
-         function textWidth(text, size, elem) {
-           var c = _textWidthCache[size];
-           if (!c) c = _textWidthCache[size] = {};
-
-           if (c[text]) {
-             return c[text];
-           } else if (elem) {
-             c[text] = elem.getComputedTextLength();
-             return c[text];
-           } else {
-             var str = encodeURIComponent(text).match(/%[CDEFcdef]/g);
+         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);
 
-             if (str === null) {
-               return size / 3 * 2 * text.length;
-             } else {
-               return size / 3 * (2 * text.length + str.length);
-             }
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
          }
 
-         function drawLinePaths(selection, entities, filter, classes, labels) {
-           var paths = selection.selectAll('path').filter(filter).data(entities, osmEntity.key); // exit
+         function clickCircle() {
+           if (!_tankID) return chapter.restart();
+           var entity = context.hasEntity(_tankID);
+           if (!entity) return continueTo(rightClickTank);
+           var node = selectMenuItem(context, 'circularize').node();
 
-           paths.exit().remove(); // enter/update
+           if (!node) {
+             return continueTo(rightClickTank);
+           }
 
-           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'));
-         }
+           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();
 
-         function drawLineLabels(selection, entities, filter, classes, labels) {
-           var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
+             if (!wasChanged && !node) {
+               return continueTo(rightClickTank);
+             }
 
-           texts.exit().remove(); // enter
+             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.
 
-           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
+             timeout(function () {
+               if (context.history().undoAnnotation() === _t('operations.circularize.annotation.feature', {
+                 n: 1
+               })) {
+                 continueTo(play);
+               } else {
+                 continueTo(retryClickCircle);
+               }
+             }, 500); // after transitioned actions
+           });
 
-           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);
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
          }
 
-         function drawPointLabels(selection, entities, filter, classes, labels) {
-           var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
+         function retryClickCircle() {
+           context.enter(modeBrowse(context));
+           revealTank(tank, helpHtml('intro.buildings.retry_circle'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               continueTo(rightClickTank);
+             }
+           });
 
-           texts.exit().remove(); // enter/update
+           function continueTo(nextStep) {
+             nextStep();
+           }
+         }
 
-           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 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');
+             }
            });
          }
 
-         function drawAreaLabels(selection, entities, filter, classes, labels) {
-           entities = entities.filter(hasText);
-           labels = labels.filter(hasText);
-           drawPointLabels(selection, entities, filter, classes, labels);
+         chapter.enter = function () {
+           addHouse();
+         };
 
-           function hasText(d, i) {
-             return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
-           }
-         }
+         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);
+         };
 
-         function drawAreaIcons(selection, entities, filter, classes, labels) {
-           var icons = selection.selectAll('use.' + classes).filter(filter).data(entities, osmEntity.key); // exit
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };
 
-           icons.exit().remove(); // enter/update
+         return utilRebind(chapter, dispatch, 'on');
+       }
 
-           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;
+       function uiIntroStartEditing(context, reveal) {
+         var dispatch = dispatch$8('done', 'startEditing');
+         var modalSelection = select(null);
+         var chapter = {
+           title: 'intro.startediting.title'
+         };
 
-             if (!picon) {
-               return '';
-             } else {
-               var isMaki = /^maki-/.test(picon);
-               return '#' + picon + (isMaki ? '-15' : '');
+         function showHelp() {
+           reveal('.map-control.help-control', helpHtml('intro.startediting.help'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               shortcuts();
              }
            });
          }
 
-         function drawCollisionBoxes(selection, rtree, which) {
-           var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
-           var gj = [];
+         function shortcuts() {
+           reveal('.map-control.help-control', helpHtml('intro.startediting.shortcuts'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               showSave();
+             }
+           });
+         }
 
-           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]]]
-               };
-             });
-           }
+         function showSave() {
+           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
 
-           var boxes = selection.selectAll('.' + which).data(gj); // exit
+           reveal('.top-toolbar button.save', helpHtml('intro.startediting.save'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               showStart();
+             }
+           });
+         }
 
-           boxes.exit().remove(); // enter/update
+         function showStart() {
+           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
 
-           boxes.enter().append('path').attr('class', classes).merge(boxes).attr('d', d3_geoPath());
+           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');
          }
 
-         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([]);
-           }
+         chapter.enter = function () {
+           showHelp();
+         };
 
-           if (fullRedraw) {
-             _rdrawn.clear();
+         chapter.exit = function () {
+           modalSelection.remove();
+           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
+         };
 
-             _rskipped.clear();
+         return utilRebind(chapter, dispatch, 'on');
+       }
 
-             _entitybboxes = {};
-           } else {
-             for (i = 0; i < entities.length; i++) {
-               entity = entities[i];
-               var toRemove = [].concat(_entitybboxes[entity.id] || []).concat(_entitybboxes[entity.id + 'I'] || []);
+       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 = {};
 
-               for (j = 0; j < toRemove.length; j++) {
-                 _rdrawn.remove(toRemove[j]);
+         var _currChapter;
 
-                 _rskipped.remove(toRemove[j]);
+         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]));
                }
              }
-           } // Loop through all the entities to do some preprocessing
 
+             selection.call(startIntro);
+           })["catch"](function () {
+             /* ignore */
+           });
+         }
 
-           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;
-               }
+         function startIntro(selection) {
+           context.enter(modeBrowse(context)); // Save current map state
 
-               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
+           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)`)
 
+           context.ui().sidebar.expand();
+           context.container().selectAll('button.sidebar-toggle').classed('disabled', true); // Block saving
 
-             if (geometry === 'vertex') {
-               geometry = 'point';
-             } // Determine which entities are label-able
+           context.inIntro(true); // Load semi-real data used in intro
 
+           if (osm) {
+             osm.toggle(false).reset();
+           }
 
-             var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
-             var icon = preset && !shouldSkipIcon(preset) && preset.icon;
-             if (!icon && !utilDisplayName(entity)) continue;
+           context.history().reset();
+           context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
+           context.history().checkpoint('initial'); // Setup imagery
 
-             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];
+           var imagery = context.background().findSource(INTRO_IMAGERY);
 
-               if (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
-                 labelable[k].push(entity);
-                 break;
-               }
-             }
+           if (imagery) {
+             context.background().baseLayerSource(imagery);
+           } else {
+             context.background().bing();
            }
 
-           var positions = {
-             point: [],
-             line: [],
-             area: []
-           };
-           var labelled = {
-             point: [],
-             line: [],
-             area: []
-           }; // Try and find a valid label for labellable entities
-
-           for (k = 0; k < labelable.length; k++) {
-             var fontSize = labelStack[k][3];
+           overlays.forEach(function (d) {
+             return context.background().toggleOverlayLayer(d);
+           }); // Setup data layers (only OSM)
 
-             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;
+           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..
 
-               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);
-               }
+           corePreferences('walkthrough_started', 'yes'); // Restore previous walkthrough progress..
 
-               if (p) {
-                 if (geometry === 'vertex') {
-                   geometry = 'point';
-                 } // treat vertex like point
+           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..
 
-                 p.classes = geometry + ' tag-' + labelStack[k][1];
-                 positions[geometry].push(p);
-                 labelled[geometry].push(entity);
-               }
-             }
-           }
 
-           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;
+               progress.push(chapter);
+               corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
              });
-           }
-
-           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..
+             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..
 
-             var bbox;
+             var incomplete = utilArrayDifference(chapterFlow, progress);
 
-             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 (!incomplete.length) {
+               corePreferences('walkthrough_completed', 'yes');
              }
 
-             if (tryInsert([bbox], entity.id, true)) {
-               return p;
+             curtain.remove();
+             navwrap.remove();
+             context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
+             context.container().selectAll('button.sidebar-toggle').classed('disabled', false);
+
+             if (osm) {
+               osm.toggle(true).reset().caches(caches);
              }
-           }
 
-           function getLineLabel(entity, width, height) {
-             var viewport = geoExtent(context.projection.clipExtent()).polygon();
-             var points = graph.childNodes(entity).map(function (node) {
-               return projection(node.loc);
+             context.history().reset().merge(Object.values(baseEntities));
+             context.background().baseLayerSource(background);
+             overlays.forEach(function (d) {
+               return context.background().toggleOverlayLayer(d);
              });
-             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);
-
-               if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
-                 continue;
-               }
-
-               var isReverse = reverse(sub);
-
-               if (isReverse) {
-                 sub = sub.reverse();
-               }
-
-               var bboxes = [];
-               var boxsize = (height + 2) / 2;
-
-               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
 
-                 var num = Math.max(1, Math.floor(geoVecLength(a, b) / boxsize / 2));
+             if (history) {
+               context.history().fromJSON(history, false);
+             }
 
-                 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)
-                   });
-                 }
-               }
+             context.map().centerZoom(center, zoom);
+             window.location.replace(hash);
+             context.inIntro(false);
+           });
+           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]);
 
-               if (tryInsert(bboxes, entity.id, false)) {
-                 // accept this one
-                 return {
-                   'font-size': height + 2,
-                   lineString: lineString(sub),
-                   startOffset: offset + '%'
-                 };
-               }
+           function enterChapter(d3_event, newChapter) {
+             if (_currChapter) {
+               _currChapter.exit();
              }
 
-             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);
-             }
+             context.enter(modeBrowse(context));
+             _currChapter = newChapter;
 
-             function lineString(points) {
-               return 'M' + points.join('L');
-             }
+             _currChapter.enter();
 
-             function subpath(points, from, to) {
-               var sofar = 0;
-               var start, end, i0, i1;
+             buttons.classed('next', false).classed('active', function (d) {
+               return d.title === _currChapter.title;
+             });
+           }
+         }
 
-               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;
+         return intro;
+       }
 
-                 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 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'
+         };
 
-                 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 update(selection) {
+           var shownItems = [];
+           var liveIssues = context.validator().getIssues({
+             what: corePreferences('validate-what') || 'edited',
+             where: corePreferences('validate-where') || 'all'
+           });
 
-                 sofar += current;
-               }
+           if (liveIssues.length) {
+             warningsItem.count = liveIssues.length;
+             shownItems.push(warningsItem);
+           }
 
-               var result = points.slice(i0, i1);
-               result.unshift(start);
-               result.push(end);
-               return result;
+           if (corePreferences('validate-what') === 'all') {
+             var resolvedIssues = context.validator().getResolvedIssues();
+
+             if (resolvedIssues.length) {
+               resolvedItem.count = resolvedIssues.length;
+               shownItems.push(resolvedItem);
              }
            }
 
-           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 = {};
+           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
 
-             if (picon) {
-               // icon and label..
-               if (addIcon()) {
-                 addLabel(iconSize + padding);
-                 return p;
-               }
-             } else {
-               // label only..
-               if (addLabel(0)) {
-                 return p;
-               }
-             }
+               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();
+           });
+         }
 
-             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
-               };
+         return function (selection) {
+           update(selection);
+           context.validator().on('validated.infobox', function () {
+             update(selection);
+           });
+         };
+       }
 
-               if (tryInsert([bbox], entity.id + 'I', true)) {
-                 p.transform = 'translate(' + iconX + ',' + iconY + ')';
-                 return true;
-               }
+       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)
 
-               return false;
-             }
+           var _dMini; // dimensions of minimap
 
-             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
-                 };
 
-                 if (tryInsert([bbox], entity.id, true)) {
-                   p.x = labelX;
-                   p.y = labelY;
-                   p.textAnchor = 'middle';
-                   p.height = height;
-                   return true;
-                 }
-               }
+           var _cMini; // center pixel of minimap
 
-               return false;
-             }
-           } // force insert a singular bounding box
-           // singular box only, no array, id better be unique
 
+           var _tStart; // transform at start of gesture
 
-           function doInsert(bbox, id) {
-             bbox.id = id;
-             var oldbox = _entitybboxes[id];
 
-             if (oldbox) {
-               _rdrawn.remove(oldbox);
-             }
+           var _tCurr; // transform at most recent event
 
-             _entitybboxes[id] = bbox;
 
-             _rdrawn.insert(bbox);
+           var _timeoutID;
+
+           function zoomStarted() {
+             if (_skipEvents) return;
+             _tStart = _tCurr = projection.transform();
+             _gesture = null;
            }
 
-           function tryInsert(bboxes, id, saveSkipped) {
-             var skipped = false;
+           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;
 
-             for (var i = 0; i < bboxes.length; i++) {
-               var bbox = bboxes[i];
-               bbox.id = id; // Check that label is visible
+             if (!isZooming && !isPanning) {
+               return; // no change
+             } // lock in either zooming or panning, don't allow both in minimap.
 
-               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;
-               }
+             if (!_gesture) {
+               _gesture = isZooming ? 'zoom' : 'pan';
              }
 
-             _entitybboxes[id] = bboxes;
+             var tMini = projection.transform();
+             var tX, tY, scale;
 
-             if (skipped) {
-               if (saveSkipped) {
-                 _rskipped.load(bboxes);
-               }
+             if (_gesture === 'zoom') {
+               scale = k / tMini.k;
+               tX = (_cMini[0] / scale - _cMini[0]) * scale;
+               tY = (_cMini[1] / scale - _cMini[1]) * scale;
              } else {
-               _rdrawn.load(bboxes);
+               k = tMini.k;
+               scale = 1;
+               tX = x - tMini.x;
+               tY = y - tMini.y;
              }
 
-             return !skipped;
+             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 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
-
-           drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
-           drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point); // lines
+           function zoomEnded() {
+             if (_skipEvents) return;
+             if (_gesture !== 'pan') return;
+             updateProjection();
+             _gesture = null;
+             context.map().center(projection.invert(_cMini)); // recenter main map..
+           }
 
-           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 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();
 
-           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
+             if (_isTransformed) {
+               utilSetTransform(tiles, 0, 0);
+               utilSetTransform(viewport, 0, 0);
+               _isTransformed = false;
+             }
 
-           drawCollisionBoxes(debug, _rskipped, 'debug-skipped');
-           drawCollisionBoxes(debug, _rdrawn, 'debug-drawn');
-           layer.call(filterLabels);
-         }
+             zoom.scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
+             _skipEvents = true;
+             wrap.call(zoom.transform, _tCurr);
+             _skipEvents = false;
+           }
 
-         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
+           function redraw() {
+             clearTimeout(_timeoutID);
+             if (_isHidden) return;
+             updateProjection();
+             var zMini = geoScaleToZoom(projection.scale()); // setup tile container
 
-           if (mouse) {
-             pad = 20;
-             bbox = {
-               minX: mouse[0] - pad,
-               minY: mouse[1] - pad,
-               maxX: mouse[0] + pad,
-               maxY: mouse[1] + pad
-             };
+             tiles = wrap.selectAll('.map-in-map-tiles').data([0]);
+             tiles = tiles.enter().append('div').attr('class', 'map-in-map-tiles').merge(tiles); // redraw background
 
-             var nearMouse = _rdrawn.search(bbox).map(function (entity) {
-               return entity.id;
-             });
+             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
 
-             ids.push.apply(ids, nearMouse);
-           } // hide labels on selected nodes (they look weird when dragging / haloed)
+             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));
+               }
+             }
 
-           for (var i = 0; i < selectedIDs.length; i++) {
-             var entity = graph.hasEntity(selectedIDs[i]);
+             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 (entity && entity.type === 'node') {
-               ids.push(selectedIDs[i]);
+             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;
+               });
              }
            }
 
-           layers.selectAll(utilEntitySelector(ids)).classed('nolabel', true); // draw the mouse bbox if debugging is on..
+           function queueRedraw() {
+             clearTimeout(_timeoutID);
+             _timeoutID = setTimeout(function () {
+               redraw();
+             }, 750);
+           }
 
-           var debug = selection.selectAll('.labels-group.debug');
-           var gj = [];
+           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 (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 (_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();
+               });
+             }
            }
 
-           var box = debug.selectAll('.debug-mouse').data(gj); // exit
+           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..
 
-           box.exit().remove(); // enter/update
+           _dMini = [200, 150]; //utilGetDimensions(wrap);
 
-           box.enter().append('path').attr('class', 'debug debug-mouse yellow').merge(box).attr('d', d3_geoPath());
+           _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);
          }
 
-         var throttleFilterLabels = throttle(filterLabels, 100);
+         return mapInMap;
+       }
 
-         drawLabels.observe = function (selection) {
-           var listener = function listener() {
-             throttleFilterLabels(selection);
-           };
+       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'));
 
-           selection.on('mousemove.hidelabels', listener);
-           context.on('enter.hidelabels', listener);
-         };
+           function disableTooHigh() {
+             var canEdit = context.map().zoom() >= context.minEditableZoom();
+             div.style('display', canEdit ? 'none' : 'block');
+           }
 
-         drawLabels.off = function (selection) {
-           throttleFilterLabels.cancel();
-           selection.on('mousemove.hidelabels', null);
-           context.on('enter.hidelabels', null);
+           context.map().on('move.notice', debounce(disableTooHigh, 500));
+           disableTooHigh();
          };
-
-         return drawLabels;
        }
 
-       var _layerEnabled$1 = false;
+       function uiPhotoviewer(context) {
+         var dispatch = dispatch$8('resize');
 
-       var _qaService$1;
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-       function svgImproveOSM(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           return dispatch.call('change');
-         }, 1000);
+         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 minZoom = 12;
-         var touchLayer = select(null);
-         var drawLayer = select(null);
-         var layerVisible = false;
+             if (services.mapillary) {
+               services.mapillary.hideViewer(context);
+             }
 
-         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
+             if (services.kartaview) {
+               services.kartaview.hideViewer(context);
+             }
+           }).append('div').call(svgIcon('#iD-icon-close'));
 
+           function preventDefault(d3_event) {
+             d3_event.preventDefault();
+           }
 
-         function getService() {
-           if (services.improveOSM && !_qaService$1) {
-             _qaService$1 = services.improveOSM;
+           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
+           }));
 
-             _qaService$1.on('loaded', throttledRedraw);
-           } else if (!services.improveOSM && _qaService$1) {
-             _qaService$1 = null;
-           }
+           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 startResize(d3_event) {
+               if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+               var mapSize = context.map().dimensions();
+
+               if (resizeOnX) {
+                 var maxWidth = mapSize[0];
+                 var newWidth = clamp(startWidth + d3_event.clientX - startX, minWidth, maxWidth);
+                 target.style('width', newWidth + 'px');
+               }
+
+               if (resizeOnY) {
+                 var maxHeight = mapSize[1] - 90; // preserve space at top/bottom of map
+
+                 var newHeight = clamp(startHeight + startY - d3_event.clientY, minHeight, maxHeight);
+                 target.style('height', newHeight + 'px');
+               }
+
+               dispatch.call(eventName, target, utilGetDimensions(target, true));
+             }
+
+             function clamp(num, min, max) {
+               return Math.max(min, Math.min(num, max));
+             }
+
+             function stopResize(d3_event) {
+               if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+               d3_event.preventDefault();
+               d3_event.stopPropagation(); // remove all the listeners we added
 
-           return _qaService$1;
-         } // Show the markers
+               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);
 
-         function editOn() {
-           if (!layerVisible) {
-             layerVisible = true;
-             drawLayer.style('display', 'block');
+               if (_pointerPrefix === 'pointer') {
+                 select(window).on('pointercancel.' + eventName, stopResize, false);
+               }
+             };
            }
-         } // Immediately remove the markers and their touch targets
+         }
+
+         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)
 
+           var photoDimensions = utilGetDimensions(photoviewer, true);
 
-         function editOff() {
-           if (layerVisible) {
-             layerVisible = false;
-             drawLayer.style('display', 'none');
-             drawLayer.selectAll('.qaItem.improveOSM').remove();
-             touchLayer.selectAll('.qaItem.improveOSM').remove();
+           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);
            }
-         } // Enable the layer.  This shows the markers and transitions them to visible.
+         };
 
+         return utilRebind(photoviewer, dispatch, 'on');
+       }
 
-         function layerOn() {
-           editOn();
-           drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
-             return dispatch.call('change');
+       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();
            });
-         } // Disable the layer.  This transitions the layer invisible and then hides the markers.
-
-
-         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');
+           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();
            });
-         } // Update the issue markers
+           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 uiScale(context) {
+         var projection = context.projection,
+             isImperial = !_mainLocalizer.usesMetric(),
+             maxLength = 180,
+             tickHeight = 8;
 
-         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..
+         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 markers = drawLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
-             return d.id;
-           }); // exit
+           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
 
-           markers.exit().remove(); // enter
 
-           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;
+           for (i = 0; i < buckets.length; i++) {
+             val = buckets[i];
 
-             if (!picon) {
-               return '';
+             if (dist >= val) {
+               scale.dist = Math.floor(dist / val) * val;
+               break;
              } else {
-               var isMaki = /^maki-/.test(picon);
-               return "#".concat(picon).concat(isMaki ? '-11' : '');
+               scale.dist = +dist.toFixed(2);
              }
-           }); // 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.improveOSM').data(data, function (d) {
-             return d.id;
-           }); // exit
+           }
 
-           targets.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;
+         }
 
-           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 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 sortY(a, b) {
-             return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
+         return function (selection) {
+           function switchUnits() {
+             isImperial = !isImperial;
+             selection.call(update);
            }
-         } // Draw the ImproveOSM layer and schedule loading issues and updating markers.
 
+           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);
+           });
+         };
+       }
 
-         function drawImproveOSM(selection) {
-           var service = getService();
-           var surface = context.surface();
+       function uiShortcuts(context) {
+         var detected = utilDetect();
+         var _activeTab = 0;
 
-           if (surface && !surface.empty()) {
-             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-           }
+         var _modalSelection;
 
-           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);
+         var _selection = select(null);
 
-           if (_layerEnabled$1) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               service.loadIssues(projection);
-               updateMarkers();
-             } else {
-               editOff();
-             }
-           }
-         } // Toggles the layer on and off
+         var _dataShortcuts;
 
+         function shortcutsModal(_modalSelection) {
+           _modalSelection.select('.modal').classed('modal-shortcuts', true);
 
-         drawImproveOSM.enabled = function (val) {
-           if (!arguments.length) return _layerEnabled$1;
-           _layerEnabled$1 = val;
+           var content = _modalSelection.select('.content');
 
-           if (_layerEnabled$1) {
-             layerOn();
-           } else {
-             layerOff();
+           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 */
+           });
+         }
 
-             if (context.selectedErrorID()) {
-               context.enter(modeBrowse(context));
-             }
-           }
+         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();
 
-           dispatch.call('change');
-           return this;
-         };
+             var i = _dataShortcuts.indexOf(d);
 
-         drawImproveOSM.supported = function () {
-           return !!getService();
-         };
+             _activeTab = i;
+             render(selection);
+           });
+           tabsEnter.append('span').html(function (d) {
+             return _t.html(d.text);
+           }); // Update
 
-         return drawImproveOSM;
-       }
+           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;
+             }
+           }).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;
 
-       var _layerEnabled$2 = false;
+             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
 
-       var _qaService$2;
 
-       function svgOsmose(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           return dispatch.call('change');
-         }, 1000);
+             arr = arr.map(function (s) {
+               return uiCmd.display(s.indexOf('.') !== -1 ? _t(s) : s);
+             });
+             return utilArrayUniq(arr).map(function (s) {
+               return {
+                 shortcut: s,
+                 separator: d.separator,
+                 suffix: d.suffix
+               };
+             });
+           }).enter().each(function (d, i, nodes) {
+             var selection = select(this);
+             var click = d.shortcut.toLowerCase().match(/(.*).click/);
 
-         var minZoom = 12;
-         var touchLayer = select(null);
-         var drawLayer = select(null);
-         var layerVisible = false;
+             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;
+               });
+             }
 
-         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
+             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';
+           });
+         }
 
-         function getService() {
-           if (services.osmose && !_qaService$2) {
-             _qaService$2 = services.osmose;
+         return function (selection, show) {
+           _selection = selection;
 
-             _qaService$2.on('loaded', throttledRedraw);
-           } else if (!services.osmose && _qaService$2) {
-             _qaService$2 = null;
-           }
+           if (show) {
+             _modalSelection = uiModal(selection);
 
-           return _qaService$2;
-         } // Show the markers
+             _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();
 
+                   _modalSelection = null;
+                 }
+               } else {
+                 _modalSelection = uiModal(_selection);
 
-         function editOn() {
-           if (!layerVisible) {
-             layerVisible = true;
-             drawLayer.style('display', 'block');
+                 _modalSelection.call(shortcutsModal);
+               }
+             });
            }
-         } // Immediately remove the markers and their touch targets
+         };
+       }
 
+       function uiDataHeader() {
+         var _datum;
 
-         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.
+         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'));
+         }
 
+         dataHeader.datum = function (val) {
+           if (!arguments.length) return _datum;
+           _datum = val;
+           return this;
+         };
 
-         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.
+         return dataHeader;
+       }
 
+       // 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 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
+       var _comboHideTimerID;
 
+       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 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..
+         var _mouseEnterHandler, _mouseLeaveHandler;
 
-           var markers = drawLayer.selectAll('.qaItem.osmose').data(data, function (d) {
-             return d.id;
-           }); // exit
+         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;
+             });
+           }));
+         };
 
-           markers.exit().remove(); // enter
+         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
 
-           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;
+               input.node().focus(); // focus the input as if it was clicked
 
-             if (!picon) {
-               return '';
-             } else {
-               var isMaki = /^maki-/.test(picon);
-               return "#".concat(picon).concat(isMaki ? '-11' : '');
-             }
-           }); // update
+               mousedown(d3_event);
+             }).on('mouseup.combo-caret', function (d3_event) {
+               d3_event.preventDefault(); // don't steal focus from input
 
-           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
-             return d.id === selectedID;
-           }).attr('transform', getTransform); // Draw targets..
+               mouseup(d3_event);
+             });
+           });
 
-           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
+           function mousedown(d3_event) {
+             if (d3_event.button !== 0) return; // left click only
 
-           targets.exit().remove(); // enter/update
+             if (input.classed('disabled')) return;
+             _tDown = +new Date(); // clear selection
 
-           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 start = input.property('selectionStart');
+             var end = input.property('selectionEnd');
 
-           function sortY(a, b) {
-             return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
+             if (start !== end) {
+               var val = utilGetSetValue(input);
+               input.node().setSelectionRange(val.length, val.length);
+               return;
+             }
+
+             input.on('mouseup.combo-input', mouseup);
            }
-         } // Draw the Osmose layer and schedule loading issues and updating markers.
 
+           function mouseup(d3_event) {
+             input.on('mouseup.combo-input', null);
+             if (d3_event.button !== 0) return; // left click only
 
-         function drawOsmose(selection) {
-           var service = getService();
-           var surface = context.surface();
+             if (input.classed('disabled')) return;
+             if (input.node() !== document.activeElement) return; // exit if this input is not focused
 
-           if (surface && !surface.empty()) {
-             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-           }
+             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.
 
-           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);
+             var combo = container.selectAll('.combobox');
 
-           if (_layerEnabled$2) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               service.loadIssues(projection);
-               updateMarkers();
+             if (combo.empty() || combo.datum() !== input.node()) {
+               var tOrig = _tDown;
+               window.setTimeout(function () {
+                 if (tOrig !== _tDown) return; // exit if user double clicked
+
+                 fetchComboData('', function () {
+                   show();
+                   render();
+                 });
+               }, 250);
              } else {
-               editOff();
+               hide();
              }
            }
-         } // Toggles the layer on and off
 
+           function focus() {
+             fetchComboData(''); // prefetch values (may warm taginfo cache)
+           }
+
+           function blur() {
+             _comboHideTimerID = window.setTimeout(hide, 75);
+           }
 
-         drawOsmose.enabled = function (val) {
-           if (!arguments.length) return _layerEnabled$2;
-           _layerEnabled$2 = val;
+           function show() {
+             hide(); // remove any existing
 
-           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
+             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();
              });
-           } else {
-             layerOff();
+             container.on('scroll.combo-scroll', render, true);
+           }
 
-             if (context.selectedErrorID()) {
-               context.enter(modeBrowse(context));
+           function hide() {
+             if (_comboHideTimerID) {
+               window.clearTimeout(_comboHideTimerID);
+               _comboHideTimerID = undefined;
              }
-           }
 
-           dispatch.call('change');
-           return this;
-         };
+             container.selectAll('.combobox').remove();
+             container.on('scroll.combo-scroll', null);
+           }
 
-         drawOsmose.supported = function () {
-           return !!getService();
-         };
+           function keydown(d3_event) {
+             var shown = !container.selectAll('.combobox').empty();
+             var tagName = input.node() ? input.node().tagName.toLowerCase() : '';
 
-         return drawOsmose;
-       }
+             switch (d3_event.keyCode) {
+               case 8: // ⌫ Backspace
 
-       function svgStreetside(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           dispatch.call('change');
-         }, 1000);
+               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;
 
-         var minZoom = 14;
-         var minMarkerZoom = 16;
-         var minViewfieldZoom = 18;
-         var layer = select(null);
-         var _viewerYaw = 0;
-         var _selectedSequence = null;
+               case 9:
+                 // ⇥ Tab
+                 accept();
+                 break;
 
-         var _streetside;
-         /**
-          * init().
-          */
+               case 13:
+                 // ↩ Return
+                 d3_event.preventDefault();
+                 d3_event.stopPropagation();
+                 break;
 
+               case 38:
+                 // ↑ Up arrow
+                 if (tagName === 'textarea' && !shown) return;
+                 d3_event.preventDefault();
 
-         function init() {
-           if (svgStreetside.initialized) return; // run once
+                 if (tagName === 'input' && !shown) {
+                   show();
+                 }
 
-           svgStreetside.enabled = false;
-           svgStreetside.initialized = true;
-         }
-         /**
-          * getService().
-          */
+                 nav(-1);
+                 break;
 
+               case 40:
+                 // ↓ Down arrow
+                 if (tagName === 'textarea' && !shown) return;
+                 d3_event.preventDefault();
 
-         function getService() {
-           if (services.streetside && !_streetside) {
-             _streetside = services.streetside;
+                 if (tagName === 'input' && !shown) {
+                   show();
+                 }
 
-             _streetside.event.on('viewerChanged.svgStreetside', viewerChanged).on('loadedImages.svgStreetside', throttledRedraw);
-           } else if (!services.streetside && _streetside) {
-             _streetside = null;
+                 nav(+1);
+                 break;
+             }
            }
 
-           return _streetside;
-         }
-         /**
-          * showLayer().
-          */
+           function keyup(d3_event) {
+             switch (d3_event.keyCode) {
+               case 27:
+                 // ⎋ Escape
+                 cancel();
+                 break;
 
+               case 13:
+                 // ↩ Return
+                 accept();
+                 break;
+             }
+           } // Called whenever the input value is changed (e.g. on typing)
 
-         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 change() {
+             fetchComboData(value(), function () {
+               _selected = null;
+               var val = input.property('value');
 
-         function hideLayer() {
-           throttledRedraw.cancel();
-           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
-         }
-         /**
-          * editOn().
-          */
+               if (_suggestions.length) {
+                 if (input.property('selectionEnd') === val.length) {
+                   _selected = tryAutocomplete();
+                 }
 
+                 if (!_selected) {
+                   _selected = val;
+                 }
+               }
 
-         function editOn() {
-           layer.style('display', 'block');
-         }
-         /**
-          * editOff().
-          */
+               if (val.length) {
+                 var combo = container.selectAll('.combobox');
 
+                 if (combo.empty()) {
+                   show();
+                 }
+               } else {
+                 hide();
+               }
 
-         function editOff() {
-           layer.selectAll('.viewfield-group').remove();
-           layer.style('display', 'none');
-         }
-         /**
-          * click() Handles 'bubble' point click event.
-          */
+               render();
+             });
+           } // Called when the user presses up/down arrows to navigate the list
 
 
-         function click(d3_event, d) {
-           var service = getService();
-           if (!service) return; // try to preserve the viewer rotation when staying on the same sequence
+           function nav(dir) {
+             if (_suggestions.length) {
+               // try to determine previously selected index..
+               var index = -1;
 
-           if (d.sequenceKey !== _selectedSequence) {
-             _viewerYaw = 0; // reset
-           }
+               for (var i = 0; i < _suggestions.length; i++) {
+                 if (_selected && _suggestions[i].value === _selected) {
+                   index = i;
+                   break;
+                 }
+               } // pick new _selected
 
-           _selectedSequence = d.sequenceKey;
-           service.ensureViewerLoaded(context).then(function () {
-             service.selectImage(context, d.key).yaw(_viewerYaw).showViewer(context);
-           });
-           context.map().centerEase(d.loc);
-         }
-         /**
-          * mouseover().
-          */
 
+               index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
+               _selected = _suggestions[index].value;
+               input.property('value', _selected);
+             }
 
-         function mouseover(d3_event, d) {
-           var service = getService();
-           if (service) service.setStyles(context, d);
-         }
-         /**
-          * mouseout().
-          */
+             render();
+             ensureVisible();
+           }
 
+           function ensureVisible() {
+             var combo = container.selectAll('.combobox');
+             if (combo.empty()) return;
+             var containerRect = container.node().getBoundingClientRect();
+             var comboRect = combo.node().getBoundingClientRect();
 
-         function mouseout() {
-           var service = getService();
-           if (service) service.setStyles(context, null);
-         }
-         /**
-          * transform().
-          */
+             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
 
 
-         function transform(d) {
-           var t = svgPointTransform(projection)(d);
-           var rot = d.ca + _viewerYaw;
+             var selected = combo.selectAll('.combobox-option.selected').node();
 
-           if (rot) {
-             t += ' rotate(' + Math.floor(rot) + ',0,0)';
+             if (selected) {
+               selected.scrollIntoView({
+                 behavior: 'smooth',
+                 block: 'nearest'
+               });
+             }
            }
 
-           return t;
-         }
+           function value() {
+             var value = input.property('value');
+             var start = input.property('selectionStart');
+             var end = input.property('selectionEnd');
 
-         function viewerChanged() {
-           var service = getService();
-           if (!service) return;
-           var viewer = service.viewer();
-           if (!viewer) return; // update viewfield rotation
+             if (start && end) {
+               value = value.substring(0, start);
+             }
 
-           _viewerYaw = viewer.getYaw(); // avoid updating if the map is currently transformed
-           // e.g. during drags or easing.
+             return value;
+           }
 
-           if (context.map().isTransformed()) return;
-           layer.selectAll('.viewfield-group.currentView').attr('transform', transform);
-         }
+           function fetchComboData(v, cb) {
+             _cancelFetch = false;
 
-         function filterBubbles(bubbles) {
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
+             _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;
+               });
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             bubbles = bubbles.filter(function (bubble) {
-               return new Date(bubble.captured_at).getTime() >= fromTimestamp;
+               if (cb) {
+                 cb();
+               }
              });
            }
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             bubbles = bubbles.filter(function (bubble) {
-               return new Date(bubble.captured_at).getTime() <= toTimestamp;
-             });
-           }
+           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 (usernames) {
-             bubbles = bubbles.filter(function (bubble) {
-               return usernames.indexOf(bubble.captured_by) !== -1;
-             });
-           }
+             if (!isNaN(parseFloat(val)) && isFinite(val)) return;
+             var bestIndex = -1;
 
-           return bubbles;
-         }
+             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 filterSequences(sequences) {
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
+               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;
+               }
+             }
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             sequences = sequences.filter(function (sequences) {
-               return new Date(sequences.properties.captured_at).getTime() >= fromTimestamp;
-             });
+             if (bestIndex !== -1) {
+               var bestVal = _suggestions[bestIndex].value;
+               input.property('value', bestVal);
+               input.node().setSelectionRange(val.length, bestVal.length);
+               return bestVal;
+             }
            }
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             sequences = sequences.filter(function (sequences) {
-               return new Date(sequences.properties.captured_at).getTime() <= toTimestamp;
-             });
-           }
+           function render() {
+             if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
+               hide();
+               return;
+             }
 
-           if (usernames) {
-             sequences = sequences.filter(function (sequences) {
-               return usernames.indexOf(sequences.properties.captured_by) !== -1;
+             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
+
+             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 accept(d3_event, d) {
+             _cancelFetch = true;
+             var thiz = input.node();
+
+             if (d) {
+               // user clicked on a suggestion
+               utilGetSetValue(input, d.value); // replace field contents
+
+               utilTriggerEvent(input, 'change');
+             } // clear (and keep) selection
+
+
+             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 cancel() {
+             _cancelFetch = true;
+             var thiz = input.node(); // clear (and remove) selection, and replace field contents
+
+             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();
            }
+         };
 
-           return sequences;
-         }
-         /**
-          * update().
-          */
+         combobox.canAutocomplete = function (val) {
+           if (!arguments.length) return _canAutocomplete;
+           _canAutocomplete = val;
+           return combobox;
+         };
 
+         combobox.caseSensitive = function (val) {
+           if (!arguments.length) return _caseSensitive;
+           _caseSensitive = val;
+           return combobox;
+         };
 
-         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 = [];
+         combobox.data = function (val) {
+           if (!arguments.length) return _data;
+           _data = val;
+           return combobox;
+         };
+
+         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;
+         };
+
+         combobox.itemsMouseEnter = function (val) {
+           if (!arguments.length) return _mouseEnterHandler;
+           _mouseEnterHandler = val;
+           return combobox;
+         };
+
+         combobox.itemsMouseLeave = function (val) {
+           if (!arguments.length) return _mouseLeaveHandler;
+           _mouseLeaveHandler = val;
+           return combobox;
+         };
+
+         return utilRebind(combobox, dispatch, 'on');
+       }
+
+       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 (context.photos().showsPanoramic()) {
-             sequences = service ? service.sequences(projection) : [];
-             bubbles = service && showMarkers ? service.bubbles(projection) : [];
-             sequences = filterSequences(sequences);
-             bubbles = filterBubbles(bubbles);
-           }
+       function uiDisclosure(context, key, expandedDefault) {
+         var dispatch = dispatch$8('toggled');
 
-           var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
-             return d.properties.key;
-           }); // exit
+         var _expanded;
 
-           traces.exit().remove(); // enter/update
+         var _label = utilFunctor('');
 
-           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
+         var _updatePreference = true;
 
-           groups.exit().remove(); // enter
+         var _content = function _content() {};
 
-           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 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';
+           }
 
-           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
+           var hideToggle = selection.selectAll('.hide-toggle-' + key).data([0]); // enter
 
-           viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
+           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
 
-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
+           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
 
-             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
-          */
+           wrap = wrap.enter().append('div').attr('class', 'disclosure-wrap disclosure-wrap-' + key).merge(wrap).classed('hide', !_expanded);
 
+           if (_expanded) {
+             wrap.call(_content);
+           }
 
-         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);
+           function toggle(d3_event) {
+             d3_event.preventDefault();
+             _expanded = !_expanded;
 
-           if (enabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               update();
-               service.loadBubbles(projection);
-             } else {
-               editOff();
+             if (_updatePreference) {
+               corePreferences('disclosure.' + key + '.expanded', _expanded);
              }
-           }
-         }
-         /**
-          * drawImages.enabled().
-          */
 
+             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));
 
-         drawImages.enabled = function (_) {
-           if (!arguments.length) return svgStreetside.enabled;
-           svgStreetside.enabled = _;
+             if (_expanded) {
+               wrap.call(_content);
+             }
 
-           if (svgStreetside.enabled) {
-             showLayer();
-             context.photos().on('change.streetside', update);
-           } else {
-             hideLayer();
-             context.photos().on('change.streetside', null);
+             dispatch.call('toggled', this, _expanded);
            }
+         };
 
-           dispatch.call('change');
-           return this;
+         disclosure.label = function (val) {
+           if (!arguments.length) return _label;
+           _label = utilFunctor(val);
+           return disclosure;
          };
-         /**
-          * drawImages.supported().
-          */
 
+         disclosure.expanded = function (val) {
+           if (!arguments.length) return _expanded;
+           _expanded = val;
+           return disclosure;
+         };
 
-         drawImages.supported = function () {
-           return !!getService();
+         disclosure.updatePreference = function (val) {
+           if (!arguments.length) return _updatePreference;
+           _updatePreference = val;
+           return disclosure;
          };
 
-         init();
-         return drawImages;
+         disclosure.content = function (val) {
+           if (!arguments.length) return _content;
+           _content = val;
+           return disclosure;
+         };
+
+         return utilRebind(disclosure, dispatch, 'on');
        }
 
-       function svgMapillaryImages(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           dispatch.call('change');
-         }, 1000);
+       // Can be labeled and collapsible.
 
-         var minZoom = 12;
-         var minMarkerZoom = 16;
-         var minViewfieldZoom = 18;
-         var layer = select(null);
+       function uiSection(id, context) {
+         var _classes = utilFunctor('');
 
-         var _mapillary;
+         var _shouldDisplay;
 
-         var viewerCompassAngle;
+         var _content;
 
-         function init() {
-           if (svgMapillaryImages.initialized) return; // run once
+         var _disclosure;
 
-           svgMapillaryImages.enabled = false;
-           svgMapillaryImages.initialized = true;
-         }
+         var _label;
 
-         function getService() {
-           if (services.mapillary && !_mapillary) {
-             _mapillary = services.mapillary;
+         var _expandedByDefault = utilFunctor(true);
 
-             _mapillary.event.on('loadedImages', throttledRedraw);
-           } else if (!services.mapillary && _mapillary) {
-             _mapillary = null;
-           }
+         var _disclosureContent;
 
-           return _mapillary;
-         }
+         var _disclosureExpanded;
 
-         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 _containerSelection = select(null);
 
-         function hideLayer() {
-           throttledRedraw.cancel();
-           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
-         }
+         var section = {
+           id: id
+         };
 
-         function editOn() {
-           layer.style('display', 'block');
-         }
+         section.classes = function (val) {
+           if (!arguments.length) return _classes;
+           _classes = utilFunctor(val);
+           return section;
+         };
 
-         function editOff() {
-           layer.selectAll('.viewfield-group').remove();
-           layer.style('display', 'none');
-         }
+         section.label = function (val) {
+           if (!arguments.length) return _label;
+           _label = utilFunctor(val);
+           return section;
+         };
 
-         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);
-         }
+         section.expandedByDefault = function (val) {
+           if (!arguments.length) return _expandedByDefault;
+           _expandedByDefault = utilFunctor(val);
+           return section;
+         };
 
-         function mouseover(d) {
-           var service = getService();
-           if (service) service.setStyles(context, d);
-         }
+         section.shouldDisplay = function (val) {
+           if (!arguments.length) return _shouldDisplay;
+           _shouldDisplay = utilFunctor(val);
+           return section;
+         };
 
-         function mouseout() {
-           var service = getService();
-           if (service) service.setStyles(context, null);
-         }
+         section.content = function (val) {
+           if (!arguments.length) return _content;
+           _content = val;
+           return section;
+         };
 
-         function transform(d) {
-           var t = svgPointTransform(projection)(d);
+         section.disclosureContent = function (val) {
+           if (!arguments.length) return _disclosureContent;
+           _disclosureContent = val;
+           return section;
+         };
 
-           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)';
-           }
+         section.disclosureExpanded = function (val) {
+           if (!arguments.length) return _disclosureExpanded;
+           _disclosureExpanded = val;
+           return section;
+         }; // may be called multiple times
 
-           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();
+         section.render = function (selection) {
+           _containerSelection = selection.selectAll('.section-' + id).data([0]);
 
-           if (!showsPano || !showsFlat) {
-             images = images.filter(function (image) {
-               if (image.pano) return showsPano;
-               return showsFlat;
-             });
-           }
+           var sectionEnter = _containerSelection.enter().append('div').attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             images = images.filter(function (image) {
-               return new Date(image.captured_at).getTime() >= fromTimestamp;
-             });
-           }
+           _containerSelection = sectionEnter.merge(_containerSelection);
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             images = images.filter(function (image) {
-               return new Date(image.captured_at).getTime() <= toTimestamp;
-             });
-           }
+           _containerSelection.call(renderContent);
+         };
 
-           if (usernames) {
-             images = images.filter(function (image) {
-               return usernames.indexOf(image.captured_by) !== -1;
-             });
-           }
+         section.reRender = function () {
+           _containerSelection.call(renderContent);
+         };
 
-           return images;
-         }
+         section.selection = function () {
+           return _containerSelection;
+         };
 
-         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();
+         section.disclosure = function () {
+           return _disclosure;
+         }; // may be called multiple times
 
-           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;
 
-                 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);
+         function renderContent(selection) {
+           if (_shouldDisplay) {
+             var shouldDisplay = _shouldDisplay();
 
-                     if (image && image.hasOwnProperty('pano')) {
-                       if (image.pano) return showsPano;
-                       return showsFlat;
-                     }
-                   }
-                 }
-               }
+             selection.classed('hide', !shouldDisplay);
 
-               return false;
-             });
+             if (!shouldDisplay) {
+               selection.html('');
+               return;
+             }
            }
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             sequences = sequences.filter(function (sequence) {
-               return new Date(sequence.properties.captured_at).getTime() >= fromTimestamp;
-             });
-           }
+           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 (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             sequences = sequences.filter(function (sequence) {
-               return new Date(sequence.properties.captured_at).getTime() <= toTimestamp;
-             });
-           }
+             if (_disclosureExpanded !== undefined) {
+               _disclosure.expanded(_disclosureExpanded);
 
-           if (usernames) {
-             sequences = sequences.filter(function (sequence) {
-               return usernames.indexOf(sequence.properties.username) !== -1;
-             });
+               _disclosureExpanded = undefined;
+             }
+
+             selection.call(_disclosure);
+             return;
            }
 
-           return sequences;
+           if (_content) {
+             selection.call(_content);
+           }
          }
 
-         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
+         return section;
+       }
 
-           traces.exit().remove(); // enter/update
+       // {
+       //   key: 'string',     // required
+       //   value: 'string'    // optional
+       // }
+       //   -or-
+       // {
+       //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
+       // }
+       //
 
-           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
+       function uiTagReference(what) {
+         var wikibase = what.qid ? services.wikidata : services.osmWikibase;
+         var tagReference = {};
 
-           groups.exit().remove(); // enter
+         var _button = 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 _body = 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 _loaded;
 
-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
+         var _showing;
 
-             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';
-             }
-           }
-         }
+         function load() {
+           if (!wikibase) return;
 
-         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);
+           _button.classed('tag-reference-loading', true);
 
-           if (enabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               update();
-               service.loadImages(projection);
-             } else {
-               editOff();
-             }
-           }
+           wikibase.getDocs(what, gotDocs);
          }
 
-         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);
-           }
-
-           dispatch.call('change');
-           return this;
-         };
-
-         drawImages.supported = function () {
-           return !!getService();
-         };
-
-         init();
-         return drawImages;
-       }
+         function gotDocs(err, docs) {
+           _body.html('');
 
-       function svgMapillaryPosition(projection, context) {
-         var throttledRedraw = throttle(function () {
-           update();
-         }, 1000);
+           if (!docs || !docs.title) {
+             _body.append('p').attr('class', 'tag-reference-description').call(_t.append('inspector.no_documentation_key'));
 
-         var minZoom = 12;
-         var minViewfieldZoom = 18;
-         var layer = select(null);
+             done();
+             return;
+           }
 
-         var _mapillary;
+           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 viewerCompassAngle;
+           var tagReferenceDescription = _body.append('p').attr('class', 'tag-reference-description').append('span');
 
-         function init() {
-           if (svgMapillaryPosition.initialized) return; // run once
+           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'));
+           }
 
-           svgMapillaryPosition.initialized = true;
-         }
+           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 getService() {
-           if (services.mapillary && !_mapillary) {
-             _mapillary = services.mapillary;
+           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
 
-             _mapillary.event.on('nodeChanged', throttledRedraw);
 
-             _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);
-             });
-           } else if (!services.mapillary && _mapillary) {
-             _mapillary = null;
+           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'));
            }
-
-           return _mapillary;
          }
 
-         function editOn() {
-           layer.style('display', 'block');
-         }
+         function done() {
+           _loaded = true;
 
-         function editOff() {
-           layer.selectAll('.viewfield-group').remove();
-           layer.style('display', 'none');
-         }
+           _button.classed('tag-reference-loading', false);
 
-         function transform(d) {
-           var t = svgPointTransform(projection)(d);
+           _body.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1');
 
-           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)';
-           }
+           _showing = true;
+
+           _button.selectAll('svg.icon use').each(function () {
+             var iconUse = select(this);
 
-           return t;
+             if (iconUse.attr('href') === '#iD-icon-info') {
+               iconUse.attr('href', '#iD-icon-info-filled');
+             }
+           });
          }
 
-         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
+         function hide() {
+           _body.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
+             _body.classed('expanded', false);
+           });
 
-           groups.exit().remove(); // enter
+           _showing = false;
 
-           var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group currentView highlighted');
-           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
+           _button.selectAll('svg.icon use').each(function () {
+             var iconUse = select(this);
 
-           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);
+             if (iconUse.attr('href') === '#iD-icon-info-filled') {
+               iconUse.attr('href', '#iD-icon-info');
+             }
+           });
+         }
 
-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
+         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);
 
-             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.on('click', function (d3_event) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+             this.blur(); // avoid keeping focus on the button - #4641
+
+             if (_showing) {
+               hide();
+             } else if (_loaded) {
+               done();
              } 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';
+               load();
              }
-           }
-         }
+           });
+         };
 
-         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);
+         tagReference.body = function (selection) {
+           var itemID = what.qid || what.key + '-' + (what.value || '');
+           _body = selection.selectAll('.tag-reference-body').data([itemID], function (d) {
+             return d;
+           });
 
-           if (service && ~~context.map().zoom() >= minZoom) {
-             editOn();
-             update();
-           } else {
-             editOff();
-           }
-         }
+           _body.exit().remove();
 
-         drawImages.enabled = function () {
-           update();
-           return this;
+           _body = _body.enter().append('div').attr('class', 'tag-reference-body').style('max-height', '0').style('opacity', '0').merge(_body);
+
+           if (_showing === false) {
+             hide();
+           }
          };
 
-         drawImages.supported = function () {
-           return !!getService();
+         tagReference.showing = function (val) {
+           if (!arguments.length) return _showing;
+           _showing = val;
+           return tagReference;
          };
 
-         init();
-         return drawImages;
+         return tagReference;
        }
 
-       function svgMapillarySigns(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           dispatch.call('change');
-         }, 1000);
-
-         var minZoom = 12;
-         var layer = select(null);
+       // It borrows some code from uiHelp
 
-         var _mapillary;
+       function uiFieldHelp(context, fieldName) {
+         var fieldHelp = {};
 
-         function init() {
-           if (svgMapillarySigns.initialized) return; // run once
+         var _inspector = select(null);
 
-           svgMapillarySigns.enabled = false;
-           svgMapillarySigns.initialized = true;
-         }
+         var _wrap = select(null);
 
-         function getService() {
-           if (services.mapillary && !_mapillary) {
-             _mapillary = services.mapillary;
+         var _body = select(null);
 
-             _mapillary.event.on('loadedSigns', throttledRedraw);
-           } else if (!services.mapillary && _mapillary) {
-             _mapillary = 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: {
+             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
 
-           return _mapillary;
-         }
+         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?
 
-         function showLayer() {
-           var service = getService();
-           if (!service) return;
-           service.loadSignResources(context);
-           editOn();
-         }
+             var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
 
-         function hideLayer() {
-           throttledRedraw.cancel();
-           editOff();
-         }
+             return all + hhh + _t.html(subkey, replacements) + '\n\n';
+           }, '');
+           return {
+             key: helpkey,
+             title: _t.html(helpkey + '.title'),
+             html: marked_1(text.trim())
+           };
+         });
 
-         function editOn() {
-           layer.style('display', 'block');
+         function show() {
+           updatePosition();
+
+           _body.classed('hide', false).style('opacity', '0').transition().duration(200).style('opacity', '1');
          }
 
-         function editOff() {
-           layer.selectAll('.icon-sign').remove();
-           layer.style('display', 'none');
+         function hide() {
+           _body.classed('hide', true).transition().duration(200).style('opacity', '0').on('end', function () {
+             _body.classed('hide', true);
+           });
          }
 
-         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 clickHelp(index) {
+           var d = docs[index];
+           var tkeys = fieldHelpKeys[fieldName][index][1];
 
-           d.detections.forEach(function (detection) {
-             if (!imageKey || selectedImageKey === detection.image_key) {
-               imageKey = detection.image_key;
-               highlightedDetection = detection;
-             }
+           _body.selectAll('.field-help-nav-item').classed('active', function (d, i) {
+             return i === index;
            });
 
-           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 content = _body.selectAll('.field-help-content').html(d.html); // class the paragraphs so we can find and style them
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             detectedFeatures = detectedFeatures.filter(function (feature) {
-               return new Date(feature.last_seen_at).getTime() >= fromTimestamp;
-             });
-           }
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             detectedFeatures = detectedFeatures.filter(function (feature) {
-               return new Date(feature.first_seen_at).getTime() <= toTimestamp;
-             });
-           }
+           content.selectAll('p').attr('class', function (d, i) {
+             return tkeys[i];
+           }); // insert special content for certain help sections
 
-           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 (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'));
            }
-
-           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
+         fieldHelp.button = function (selection) {
+           if (_body.empty()) return;
+           var button = selection.selectAll('.field-help-button').data([0]); // enter/update
 
-           signs.exit().remove(); // enter
+           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();
 
-           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;
+             if (_body.classed('hide')) {
+               show();
+             } else {
+               hide();
+             }
            });
-           enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update
-
-           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;
-             }
+         function updatePosition() {
+           var wrap = _wrap.node();
 
-             return -1;
-           });
-         }
+           var inspector = _inspector.node();
 
-         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);
+           var wRect = wrap.getBoundingClientRect();
+           var iRect = inspector.getBoundingClientRect();
 
-           if (enabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               update();
-               service.loadSigns(projection);
-               service.showSignDetections(true);
-             } else {
-               editOff();
-             }
-           } else if (service) {
-             service.showSignDetections(false);
-           }
+           _body.style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
          }
 
-         drawSigns.enabled = function (_) {
-           if (!arguments.length) return svgMapillarySigns.enabled;
-           svgMapillarySigns.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
 
-           if (svgMapillarySigns.enabled) {
-             showLayer();
-             context.photos().on('change.mapillary_signs', update);
-           } else {
-             hideLayer();
-             context.photos().on('change.mapillary_signs', 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;
-         };
+           var enter = _body.enter().append('div').attr('class', 'field-help-body hide'); // initially hidden
 
-         drawSigns.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 drawSigns;
+         return fieldHelp;
        }
 
-       function svgMapillaryMapFeatures(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 layer = select(null);
+         var _tags;
 
-         var _mapillary;
+         var input = select(null);
+         var text = select(null);
+         var label = select(null);
+         var reverser = select(null);
 
-         function init() {
-           if (svgMapillaryMapFeatures.initialized) return; // run once
+         var _impliedYes;
 
-           svgMapillaryMapFeatures.enabled = false;
-           svgMapillaryMapFeatures.initialized = true;
-         }
+         var _entityIDs = [];
 
-         function getService() {
-           if (services.mapillary && !_mapillary) {
-             _mapillary = services.mapillary;
+         var _value;
 
-             _mapillary.event.on('loadedMapFeatures', throttledRedraw);
-           } else if (!services.mapillary && _mapillary) {
-             _mapillary = null;
+         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')];
 
-           return _mapillary;
-         }
-
-         function showLayer() {
-           var service = getService();
-           if (!service) return;
-           service.loadObjectResources(context);
-           editOn();
-         }
-
-         function hideLayer() {
-           throttledRedraw.cancel();
-           editOff();
-         }
+           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 editOn() {
-           layer.style('display', 'block');
-         }
 
-         function editOff() {
-           layer.selectAll('.icon-map-feature').remove();
-           layer.style('display', 'none');
-         }
+         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 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.
+           if (field.id === 'oneway') {
+             var entity = context.entity(_entityIDs[0]);
 
-           d.detections.forEach(function (detection) {
-             if (!imageKey || selectedImageKey === detection.image_key) {
-               imageKey = detection.image_key;
-               highlightedDetection = detection;
+             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;
+               }
              }
-           });
-
-           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();
+         function reverserHidden() {
+           if (!context.container().select('div.inspector-hover').empty()) return true;
+           return !(_value === 'yes' || _impliedYes && !_value);
+         }
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             detectedFeatures = detectedFeatures.filter(function (feature) {
-               return new Date(feature.last_seen_at).getTime() >= fromTimestamp;
-             });
-           }
+         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;
+         }
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             detectedFeatures = detectedFeatures.filter(function (feature) {
-               return new Date(feature.first_seen_at).getTime() <= toTimestamp;
-             });
-           }
+         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');
 
-           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 (field.type === 'onewayCheck') {
+             enter.append('button').attr('class', 'reverser' + (reverserHidden() ? ' hide' : '')).append('span').attr('class', 'reverser-span');
            }
 
-           return detectedFeatures;
-         }
+           label = label.merge(enter);
+           input = label.selectAll('input');
+           text = label.selectAll('span.value');
+           input.on('click', function (d3_event) {
+             d3_event.stopPropagation();
+             var t = {};
 
-         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
+             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)
 
-           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';
+             if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
+               t[field.key] = values[0];
              }
 
-             return '#' + d.value;
+             dispatch.call('change', this, t);
            });
-           enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update
 
-           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.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);
+                 }
 
-             if (aSelected === bSelected) {
-               return b.loc[1] - a.loc[1]; // sort Y
-             } else if (aSelected) {
-               return 1;
-             }
+                 return graph;
+               }, _t('operations.reverse.annotation.line', {
+                 n: 1
+               })); // must manually revalidate since no 'change' event was called
 
-             return -1;
-           });
-         }
+               context.validator().validate();
+               select(this).call(reverserSetText);
+             });
+           }
+         };
+
+         check.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return check;
+         };
 
-         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);
+         check.tags = function (tags) {
+           _tags = tags;
 
-           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 isChecked(val) {
+             return val !== 'no' && val !== '' && val !== undefined && val !== null;
            }
-         }
 
-         drawMapFeatures.enabled = function (_) {
-           if (!arguments.length) return svgMapillaryMapFeatures.enabled;
-           svgMapillaryMapFeatures.enabled = _;
+           function textFor(val) {
+             if (val === '') val = undefined;
+             var index = values.indexOf(val);
+             return index !== -1 ? texts[index] : '"' + val + '"';
+           }
 
-           if (svgMapillaryMapFeatures.enabled) {
-             showLayer();
-             context.photos().on('change.mapillary_map_features', update);
-           } else {
-             hideLayer();
-             context.photos().on('change.mapillary_map_features', null);
+           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';
            }
 
-           dispatch.call('change');
-           return this;
+           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);
+
+           if (field.type === 'onewayCheck') {
+             reverser.classed('hide', reverserHidden()).call(reverserSetText);
+           }
          };
 
-         drawMapFeatures.supported = function () {
-           return !!getService();
+         check.focus = function () {
+           input.node().focus();
          };
 
-         init();
-         return drawMapFeatures;
+         return utilRebind(check, dispatch, 'on');
        }
 
-       function svgOpenstreetcamImages(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           dispatch.call('change');
-         }, 1000);
+       function uiFieldCombo(field, context) {
+         var dispatch = dispatch$8('change');
 
-         var minZoom = 12;
-         var minMarkerZoom = 16;
-         var minViewfieldZoom = 18;
-         var layer = select(null);
+         var _isMulti = field.type === 'multiCombo' || field.type === 'manyCombo';
 
-         var _openstreetcam;
+         var _isNetwork = field.type === 'networkCombo';
 
-         function init() {
-           if (svgOpenstreetcamImages.initialized) return; // run once
+         var _isSemi = field.type === 'semiCombo';
 
-           svgOpenstreetcamImages.enabled = false;
-           svgOpenstreetcamImages.initialized = true;
-         }
+         var _optarray = field.options;
 
-         function getService() {
-           if (services.openstreetcam && !_openstreetcam) {
-             _openstreetcam = services.openstreetcam;
+         var _showTagInfoSuggestions = field.type !== 'manyCombo' && field.autoSuggestions !== false;
 
-             _openstreetcam.event.on('loadedImages', throttledRedraw);
-           } else if (!services.openstreetcam && _openstreetcam) {
-             _openstreetcam = null;
-           }
+         var _allowCustomValues = field.type !== 'manyCombo' && field.customValues !== false;
 
-           return _openstreetcam;
-         }
+         var _snake_case = field.snake_case || field.snake_case === undefined;
 
-         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 _combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(field.caseSensitive).minItems(_isMulti || _isSemi ? 1 : 2);
 
-         function hideLayer() {
-           throttledRedraw.cancel();
-           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
-         }
+         var _container = select(null);
 
-         function editOn() {
-           layer.style('display', 'block');
-         }
+         var _inputWrap = select(null);
 
-         function editOff() {
-           layer.selectAll('.viewfield-group').remove();
-           layer.style('display', 'none');
-         }
+         var _input = select(null);
 
-         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);
-         }
+         var _comboData = [];
+         var _multiData = [];
+         var _entityIDs = [];
 
-         function mouseover(d3_event, d) {
-           var service = getService();
-           if (service) service.setStyles(context, d);
+         var _tags;
+
+         var _countryCode;
+
+         var _staticPlaceholder; // initialize deprecated tags array
+
+
+         var _dataDeprecated = [];
+         _mainFileFetcher.get('deprecated').then(function (d) {
+           _dataDeprecated = d;
+         })["catch"](function () {
+           /* ignore */
+         }); // ensure multiCombo field.key ends with a ':'
+
+         if (_isMulti && field.key && /[^:]$/.test(field.key)) {
+           field.key += ':';
          }
 
-         function mouseout() {
-           var service = getService();
-           if (service) service.setStyles(context, null);
+         function snake(s) {
+           return s.replace(/\s+/g, '_').toLowerCase();
          }
 
-         function transform(d) {
-           var t = svgPointTransform(projection)(d);
+         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)
 
-           if (d.ca) {
-             t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
-           }
 
-           return t;
-         }
+         function tagValue(dval) {
+           dval = clean(dval || '');
 
-         function filterImages(images) {
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
+           var found = _comboData.find(function (o) {
+             return o.key && clean(o.value) === dval;
+           });
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             images = images.filter(function (item) {
-               return new Date(item.captured_at).getTime() >= fromTimestamp;
-             });
+           if (found) return found.key;
+
+           if (field.type === 'typeCombo' && !dval) {
+             return 'yes';
            }
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             images = images.filter(function (item) {
-               return new Date(item.captured_at).getTime() <= toTimestamp;
+           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 || '';
+
+           if (field.hasTextForStringId('options.' + tval)) {
+             return field.t('options.' + tval, {
+               "default": tval
              });
            }
 
-           if (usernames) {
-             images = images.filter(function (item) {
-               return usernames.indexOf(item.captured_by) !== -1;
-             });
+           if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
+             return '';
            }
 
-           return images;
-         }
+           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 filterSequences(sequences) {
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             sequences = sequences.filter(function (image) {
-               return new Date(image.properties.captured_at).getTime() >= fromTimestamp;
+         function objectDifference(a, b) {
+           return a.filter(function (d1) {
+             return !b.some(function (d2) {
+               return !d2.isMixed && d1.value === d2.value;
              });
-           }
+           });
+         }
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             sequences = sequences.filter(function (image) {
-               return new Date(image.properties.captured_at).getTime() <= toTimestamp;
-             });
+         function initCombo(selection, attachTo) {
+           if (!_allowCustomValues) {
+             selection.attr('readonly', 'readonly');
            }
 
-           if (usernames) {
-             sequences = sequences.filter(function (image) {
-               return usernames.indexOf(image.properties.captured_by) !== -1;
-             });
+           if (_showTagInfoSuggestions && services.taginfo) {
+             selection.call(_combobox.fetcher(setTaginfoValues), attachTo);
+             setTaginfoValues('', setPlaceholder);
+           } else {
+             selection.call(_combobox, attachTo);
+             setStaticValues(setPlaceholder);
            }
+         }
 
-           return sequences;
+         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 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 = [];
+         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 (context.photos().showsFlat()) {
-             sequences = service ? service.sequences(projection) : [];
-             images = service && showMarkers ? service.images(projection) : [];
-             sequences = filterSequences(sequences);
-             images = filterImages(images);
+           if (hasCountryPrefix) {
+             query = _countryCode + ':';
            }
 
-           var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
-             return d.properties.key;
-           }); // exit
+           var params = {
+             debounce: q !== '',
+             key: field.key,
+             query: query
+           };
 
-           traces.exit().remove(); // enter/update
+           if (_entityIDs.length) {
+             params.geometry = context.graph().geometry(_entityIDs[0]);
+           }
 
-           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
+           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
 
-           groups.exit().remove(); // enter
 
-           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 !d.count || d.count > 10;
+             });
+             var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];
 
-           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');
+             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
+
+
+             _container.classed('empty-combobox', data.length === 0);
+
+             _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 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);
+         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 (enabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               update();
-               service.loadImages(projection);
-             } else {
-               editOff();
-             }
+           if (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
+             _staticPlaceholder += '…';
            }
-         }
 
-         drawImages.enabled = function (_) {
-           if (!arguments.length) return svgOpenstreetcamImages.enabled;
-           svgOpenstreetcamImages.enabled = _;
+           var ph;
 
-           if (svgOpenstreetcamImages.enabled) {
-             showLayer();
-             context.photos().on('change.openstreetcam_images', update);
+           if (!_isMulti && !_isSemi && _tags && Array.isArray(_tags[field.key])) {
+             ph = _t('inspector.multiple_values');
            } else {
-             hideLayer();
-             context.photos().on('change.openstreetcam_images', null);
+             ph = _staticPlaceholder;
            }
 
-           dispatch.call('change');
-           return this;
-         };
+           _container.selectAll('input').attr('placeholder', ph);
+         }
 
-         drawImages.supported = function () {
-           return !!getService();
-         };
+         function change() {
+           var t = {};
+           var val;
 
-         init();
-         return drawImages;
-       }
+           if (_isMulti || _isSemi) {
+             val = tagValue(utilGetSetValue(_input).replace(/,/g, ';')) || '';
 
-       function svgOsm(projection, context, dispatch) {
-         var enabled = true;
+             _container.classed('active', false);
 
-         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;
-           });
-         }
+             utilGetSetValue(_input, '');
+             var vals = val.split(';').filter(Boolean);
+             if (!vals.length) return;
 
-         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 (_isMulti) {
+               utilArrayUniq(vals).forEach(function (v) {
+                 var key = (field.key || '') + v;
 
-         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');
-           });
-         }
+                 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;
+                 }
 
-         drawOsm.enabled = function (val) {
-           if (!arguments.length) return enabled;
-           enabled = val;
+                 key = context.cleanTagKey(key);
+                 field.keys.push(key);
+                 t[key] = 'yes';
+               });
+             } else if (_isSemi) {
+               var arr = _multiData.map(function (d) {
+                 return d.key;
+               });
 
-           if (enabled) {
-             showLayer();
+               arr = arr.concat(vals);
+               t[field.key] = context.cleanTagValue(utilArrayUniq(arr).filter(Boolean).join(';'));
+             }
+
+             window.setTimeout(function () {
+               _input.node().focus();
+             }, 10);
            } else {
-             hideLayer();
+             var rawValue = utilGetSetValue(_input); // don't override multiple values with blank string
+
+             if (!rawValue && Array.isArray(_tags[field.key])) return;
+             val = context.cleanTagValue(tagValue(rawValue));
+             t[field.key] = val || undefined;
            }
 
-           dispatch.call('change');
-           return this;
-         };
+           dispatch.call('change', this, t);
+         }
 
-         return drawOsm;
-       }
+         function removeMultikey(d3_event, d) {
+           d3_event.preventDefault();
+           d3_event.stopPropagation();
+           var t = {};
 
-       var _notesEnabled = false;
+           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);
 
-       var _osmService;
+             arr = utilArrayUniq(arr);
+             t[field.key] = arr.length ? arr.join(';') : undefined;
+           }
 
-       function svgNotes(projection, context, dispatch$1) {
-         if (!dispatch$1) {
-           dispatch$1 = dispatch('change');
+           dispatch.call('change', this, t);
          }
 
-         var throttledRedraw = throttle(function () {
-           dispatch$1.call('change');
-         }, 1000);
+         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);
 
-         var minZoom = 12;
-         var touchLayer = select(null);
-         var drawLayer = select(null);
-         var _notesVisible = false;
+           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
 
-         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.
+             if (field.key === 'destination' || field.key === 'via') {
+               listClass += ' full-line-chips';
+             }
 
+             _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]);
+           }
 
-         function getService() {
-           if (services.osm && !_osmService) {
-             _osmService = services.osm;
+           _input = _input.enter().append('input').attr('type', 'text').attr('id', field.domId).call(utilNoAuto).call(initCombo, selection).merge(_input);
 
-             _osmService.on('loadedNotes', throttledRedraw);
-           } else if (!services.osm && _osmService) {
-             _osmService = null;
+           if (_isNetwork) {
+             var extent = combinedEntityExtent();
+             var countryCode = extent && iso1A2Code(extent.center());
+             _countryCode = countryCode && countryCode.toLowerCase();
            }
 
-           return _osmService;
-         } // Show the notes
+           _input.on('change', change).on('blur', change);
+
+           _input.on('keydown.field', function (d3_event) {
+             switch (d3_event.keyCode) {
+               case 13:
+                 // ↩ Return
+                 _input.node().blur(); // blurring also enters the value
+
+
+                 d3_event.stopPropagation();
+                 break;
+             }
+           });
+
+           if (_isMulti || _isSemi) {
+             _combobox.on('accept', function () {
+               _input.node().blur();
 
+               _input.node().focus();
+             });
 
-         function editOn() {
-           if (!_notesVisible) {
-             _notesVisible = true;
-             drawLayer.style('display', 'block');
+             _input.on('focus', function () {
+               _container.classed('active', true);
+             });
            }
-         } // Immediately remove the notes and their touch targets
+         }
 
+         combo.tags = function (tags) {
+           _tags = tags;
 
-         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.
+           if (_isMulti || _isSemi) {
+             _multiData = [];
+             var maxLength;
 
+             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;
 
-         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.
+                 _multiData.push({
+                   key: k,
+                   value: displayValue(suffix),
+                   isMixed: Array.isArray(v)
+                 });
+               }
 
+               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
 
-         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
+                 maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
+               } else {
+                 maxLength = context.maxCharsForTagKey();
+               }
+             } else if (_isSemi) {
+               var allValues = [];
+               var commonValues;
 
+               if (Array.isArray(tags[field.key])) {
+                 tags[field.key].forEach(function (tagVal) {
+                   var thisVals = utilArrayUniq((tagVal || '').split(';')).filter(Boolean);
+                   allValues = allValues.concat(thisVals);
 
-         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 (!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;
+               }
 
-           var notes = drawLayer.selectAll('.note').data(data, function (d) {
-             return d.status + d.id;
-           }); // exit
+               _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
 
-           notes.exit().remove(); // enter
+               maxLength = context.maxCharsForTagValue() - currLength;
 
-           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
+               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
 
-           notes.merge(notesEnter).sort(sortY).classed('selected', function (d) {
-             var mode = context.mode();
-             var isMoving = mode && mode.id === 'drag-note'; // no shadows when dragging
 
-             return !isMoving && d.id === selectedID;
-           }).attr('transform', getTransform); // Draw targets..
+             maxLength = Math.max(0, maxLength);
+             var allowDragAndDrop = _isSemi // only semiCombo values are ordered
+             && !Array.isArray(tags[field.key]); // Exclude existing multikeys from combo options..
 
-           if (touchLayer.empty()) return;
-           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-           var targets = touchLayer.selectAll('.note').data(data, function (d) {
-             return d.id;
-           }); // exit
+             var available = objectDifference(_comboData, _multiData);
 
-           targets.exit().remove(); // enter/update
+             _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
 
-           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);
 
-           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.
+             var hideAdd = !_allowCustomValues && !available.length || maxLength <= 0;
 
+             _container.selectAll('.chiplist .input-wrap').style('display', hideAdd ? 'none' : null); // Render chips
 
-         function drawNotes(selection) {
-           var service = getService();
-           var surface = context.surface();
 
-           if (surface && !surface.empty()) {
-             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-           }
+             var chips = _container.selectAll('.chip').data(_multiData);
 
-           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);
+             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 (_notesEnabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               service.loadNotes(projection);
-               updateMarkers();
-             } else {
-               editOff();
+             if (allowDragAndDrop) {
+               registerDragAndDrop(chips);
              }
-           }
-         } // Toggles the layer on and off
-
-
-         drawNotes.enabled = function (val) {
-           if (!arguments.length) return _notesEnabled;
-           _notesEnabled = val;
 
-           if (_notesEnabled) {
-             layerOn();
+             chips.select('span').text(function (d) {
+               return d.value;
+             });
+             chips.select('a').attr('href', '#').on('click', removeMultikey).attr('class', 'remove').text('×');
            } else {
-             layerOff();
-
-             if (context.selectedNoteID()) {
-               context.enter(modeBrowse(context));
-             }
+             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);
+               }
+             });
            }
-
-           dispatch$1.call('change');
-           return this;
          };
 
-         return drawNotes;
-       }
+         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;
 
-       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 (field.key === 'destination' || field.key === 'via') {
+               // meaning tags are full width
+               _container.selectAll('.chip').style('transform', function (d2, index2) {
+                 var node = select(this).node();
 
-         return drawTouch;
-       }
+                 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;
+                   }
 
-       function refresh(selection, node) {
-         var cr = node.getBoundingClientRect();
-         var prop = [cr.width, cr.height];
-         selection.property('__dimensions__', prop);
-         return prop;
-       }
+                   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 utilGetDimensions(selection, force) {
-         if (!selection || selection.empty()) {
-           return [0, 0];
-         }
+                   return 'translateY(100%)';
+                 }
 
-         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;
-         }
+                 return null;
+               });
+             } else {
+               _container.selectAll('.chip').each(function (d2, index2) {
+                 var node = select(this).node(); // check the cursor is in the bounding box
 
-         var node = selection.node();
+                 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 (dimensions === null) {
-           refresh(selection, node);
-           return selection;
-         }
+                 if (index === index2) {
+                   return 'translate(' + x + 'px, ' + y + 'px)';
+                 } // only translate tags in the same row
 
-         return selection.property('__dimensions__', [dimensions[0], dimensions[1]]).attr('width', dimensions[0]).attr('height', dimensions[1]);
-       }
 
-       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()
-         }];
+                 if (node.offsetTop === targetIndexOffsetTop) {
+                   if (index2 < index && index2 >= targetIndex) {
+                     return 'translateX(' + draggedTagWidth + 'px)';
+                   } else if (index2 > index && index2 <= targetIndex) {
+                     return 'translateX(-' + draggedTagWidth + 'px)';
+                   }
+                 }
 
-         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);
-           });
-         }
+                 return null;
+               });
+             }
+           }).on('end', function () {
+             if (!select(this).classed('dragging')) {
+               return;
+             }
 
-         drawLayers.all = function () {
-           return _layers;
-         };
+             var index = selection.nodes().indexOf(this);
+             select(this).classed('dragging', false);
 
-         drawLayers.layer = function (id) {
-           var obj = _layers.find(function (o) {
-             return o.id === id;
-           });
+             _container.selectAll('.chip').style('transform', null);
 
-           return obj && obj.layer;
-         };
+             if (typeof targetIndex === 'number') {
+               var element = _multiData[index];
 
-         drawLayers.only = function (what) {
-           var arr = [].concat(what);
+               _multiData.splice(index, 1);
 
-           var all = _layers.map(function (layer) {
-             return layer.id;
-           });
+               _multiData.splice(targetIndex, 0, element);
 
-           return drawLayers.remove(utilArrayDifference(all, arr));
-         };
+               var t = {};
 
-         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;
-         };
+               if (_multiData.length) {
+                 t[field.key] = _multiData.map(function (element) {
+                   return element.key;
+                 }).join(';');
+               } else {
+                 t[field.key] = undefined;
+               }
 
-         drawLayers.add = function (what) {
-           var arr = [].concat(what);
-           arr.forEach(function (obj) {
-             if ('id' in obj && 'layer' in obj) {
-               _layers.push(obj);
+               dispatch.call('change', this, t);
              }
-           });
-           dispatch$1.call('change');
-           return this;
-         };
 
-         drawLayers.dimensions = function (val) {
-           if (!arguments.length) return utilGetDimensions(svg);
-           utilSetDimensions(svg, val);
-           return this;
-         };
+             dragOrigin = undefined;
+             targetIndex = undefined;
+           }));
+         }
 
-         return utilRebind(drawLayers, dispatch$1, 'on');
-       }
+         combo.focus = function () {
+           _input.node().focus();
+         };
 
-       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
+         combo.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return combo;
          };
 
-         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
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }
 
-           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
+         return utilRebind(combo, dispatch, 'on');
+       }
 
-           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
+       // based on https://github.com/bestiejs/punycode.js/blob/master/punycode.js
+       var global$2 = global$1o;
+       var uncurryThis$1 = functionUncurryThis;
 
-           targets.exit().remove();
+       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 segmentWasEdited = function segmentWasEdited(d) {
-             var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
+       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 (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
-               return false;
+       /**
+        * 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 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
+       /**
+        * 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);
+       };
 
-           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);
+       /**
+        * 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);
+         while (delta > baseMinusTMin * tMax >> 1) {
+           delta = floor$1(delta / baseMinusTMin);
+           k += base;
          }
+         return floor$1(k + (baseMinusTMin + 1) * delta / (delta + skew));
+       };
 
-         function drawLines(selection, graph, entities, filter) {
-           var base = context.history().base();
+       /**
+        * Converts a string of Unicode symbols (e.g. a domain name label) to a
+        * Punycode string of ASCII-only symbols.
+        */
+       var encode = function (input) {
+         var output = [];
 
-           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;
+         // Convert the input in UCS-2 to an array of Unicode code points.
+         input = ucs2decode(input);
 
-             if (a.tags.highway) {
-               scoreA -= highway_stack[a.tags.highway];
-             }
+         // Cache the length.
+         var inputLength = input.length;
 
-             if (b.tags.highway) {
-               scoreB -= highway_stack[b.tags.highway];
-             }
+         // Initialize the state.
+         var n = initialN;
+         var delta = 0;
+         var bias = initialBias;
+         var i, currentValue;
 
-             return scoreA - scoreB;
+         // Handle the basic code points.
+         for (i = 0; i < input.length; i++) {
+           currentValue = input[i];
+           if (currentValue < 0x80) {
+             push$1(output, fromCharCode(currentValue));
            }
+         }
 
-           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
+         var basicLength = output.length; // number of basic code points.
+         var handledCPCount = basicLength; // number of code points that have been handled;
 
-                 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';
-                 }
-               }
+         // Finish the basic string with a delimiter unless it's empty.
+         if (basicLength) {
+           push$1(output, delimiter);
+         }
 
-               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;
+         // 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;
+             }
            }
 
-           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;
-               });
-             };
+           // 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);
            }
 
-           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;
-             });
+           delta += (m - n) * handledCPCountPlusOne;
+           n = m;
 
-             if (detected.ie) {
-               markers.each(function () {
-                 this.parentNode.insertBefore(this, this);
-               });
+           for (i = 0; i < input.length; i++) {
+             currentValue = input[i];
+             if (currentValue < n && ++delta > maxInt) {
+               throw RangeError$1(OVERFLOW_ERROR);
              }
-           }
-
-           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);
+             if (currentValue == n) {
+               // Represent delta as a generalized variable-length integer.
+               var q = delta;
+               var k = base;
+               while (true) {
+                 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);
+                 k += base;
+               }
 
-             if (outer) {
-               ways.push(entity.mergeTags(outer.tags));
-               oldMultiPolygonOuters[outer.id] = true;
-             } else if (entity.geometry(graph) === 'line') {
-               ways.push(entity);
+               push$1(output, fromCharCode(digitToBasic(q)));
+               bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
+               delta = 0;
+               handledCPCount++;
              }
            }
 
-           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
-
-           var uncovered = selection.selectAll('.layer-osm.lines'); // over areas
-
-           var touchLayer = selection.selectAll('.layer-touch.lines'); // Draw lines..
-
-           [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..
+           delta++;
+           n++;
+         }
+         return join$1(output, '');
+       };
 
-           touchLayer.call(drawTargets, graph, ways, filter);
+       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, '.');
+       };
 
-         return drawLines;
-       }
+       // TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
 
-       function svgMidpoints(projection, context) {
-         var targetRadius = 8;
+       var $ = _export;
+       var DESCRIPTORS = descriptors;
+       var USE_NATIVE_URL = nativeUrl;
+       var global$1 = global$1o;
+       var bind$2 = functionBindContext;
+       var uncurryThis = functionUncurryThis;
+       var defineProperties = objectDefineProperties.f;
+       var redefine = redefine$h.exports;
+       var anInstance = anInstance$7;
+       var hasOwn = hasOwnProperty_1;
+       var assign$1 = objectAssign;
+       var arrayFrom = arrayFrom$1;
+       var arraySlice = arraySliceSimple;
+       var codeAt = stringMultibyte.codeAt;
+       var toASCII = stringPunycodeToAscii;
+       var $toString = toString$k;
+       var setToStringTag = setToStringTag$a;
+       var validateArgumentsLength = validateArgumentsLength$4;
+       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);
 
-         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
+       var INVALID_AUTHORITY = 'Invalid authority';
+       var INVALID_SCHEME = 'Invalid scheme';
+       var INVALID_HOST = 'Invalid host';
+       var INVALID_PORT = 'Invalid port';
 
-           targets.exit().remove(); // enter/update
+       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;
 
-           targets.enter().append('circle').attr('r', targetRadius).merge(targets).attr('class', function (d) {
-             return 'node midpoint target ' + fillClass + d.id;
-           }).attr('transform', getTransform);
+       // https://url.spec.whatwg.org/#ipv4-number-parser
+       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--;
          }
-
-         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;
+         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 {
+             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;
+       };
 
-           var poly = extent.polygon();
-           var midpoints = {};
-
-           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);
-
-             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 (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;
-
-                 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]]);
+       // https://url.spec.whatwg.org/#concept-ipv6-parser
+       // 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;
 
-                     if (point && geoVecLength(projection(a.loc), projection(point)) > 20 && geoVecLength(projection(b.loc), projection(point)) > 20) {
-                       loc = point;
-                       break;
-                     }
-                   }
-                 }
+         var chr = function () {
+           return charAt(input, pointer);
+         };
 
-                 if (loc) {
-                   midpoints[id] = {
-                     type: 'midpoint',
-                     id: id,
-                     loc: loc,
-                     edge: [a.id, b.id],
-                     parents: [entity]
-                   };
-                 }
+         if (chr() == ':') {
+           if (charAt(input, 1) != ':') return;
+           pointer += 2;
+           pieceIndex++;
+           compress = pieceIndex;
+         }
+         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;
+       };
 
-           function midpointFilter(d) {
-             if (midpoints[d.id]) return true;
-
-             for (var i = 0; i < d.parents.length; i++) {
-               if (filter(d.parents[i])) {
-                 return true;
-               }
+       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 {
+             if (currStart === null) currStart = index;
+             ++currLength;
+           }
+         }
+         if (currLength > maxLength) {
+           maxIndex = currStart;
+           maxLength = currLength;
+         }
+         return maxIndex;
+       };
 
-             return false;
+       // https://url.spec.whatwg.org/#host-serializing
+       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;
+       };
 
-           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 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
+       });
 
-           groups.select('polygon.shadow');
-           groups.select('polygon.fill'); // Draw touch targets..
+       var percentEncode = function (chr, set) {
+         var code = codeAt(chr, 0);
+         return code > 0x20 && code < 0x7F && !hasOwn(set, chr) ? chr : encodeURIComponent(chr);
+       };
+
+       // https://url.spec.whatwg.org/#special-scheme
+       var specialSchemes = {
+         ftp: 21,
+         file: null,
+         http: 80,
+         https: 443,
+         ws: 80,
+         wss: 443
+       };
+
+       // https://url.spec.whatwg.org/#windows-drive-letter
+       var isWindowsDriveLetter = function (string, normalized) {
+         var second;
+         return string.length == 2 && exec(ALPHA, charAt(string, 0))
+           && ((second = charAt(string, 1)) == ':' || (!normalized && second == '|'));
+       };
+
+       // https://url.spec.whatwg.org/#start-with-a-windows-drive-letter
+       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 === '#')
+         );
+       };
+
+       // https://url.spec.whatwg.org/#single-dot-path-segment
+       var isSingleDot = function (segment) {
+         return segment === '.' || toLowerCase(segment) === '%2e';
+       };
+
+       // https://url.spec.whatwg.org/#double-dot-path-segment
+       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 = {};
 
-           touchLayer.call(drawTargets, graph, Object.values(midpoints), midpointFilter);
+       var URLState = function (url, isBase, base) {
+         var urlString = $toString(url);
+         var baseState, failure, searchParams;
+         if (isBase) {
+           failure = this.parse(urlString);
+           if (failure) throw TypeError$1(failure);
+           this.searchParams = null;
+         } else {
+           if (base !== undefined) baseState = new URLState(base, true);
+           failure = this.parse(urlString, null, baseState);
+           if (failure) throw TypeError$1(failure);
+           searchParams = getInternalSearchParamsState(new URLSearchParams$1());
+           searchParams.bindURL(this);
+           this.searchParams = searchParams;
          }
+       };
 
-         return drawMidpoints;
-       }
+       URLState.prototype = {
+         type: 'URL',
+         // https://url.spec.whatwg.org/#url-parsing
+         // eslint-disable-next-line max-statements -- TODO
+         parse: function (input, stateOverride, base) {
+           var url = this;
+           var state = stateOverride || SCHEME_START;
+           var pointer = 0;
+           var buffer = '';
+           var seenAt = false;
+           var seenBracket = false;
+           var seenPasswordToken = false;
+           var codePoints, chr, bufferCodePoints, failure;
+
+           input = $toString(input);
+
+           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, '');
+           }
 
-       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');
-         }
+           input = replace(input, TAB_AND_NEW_LINE, '');
 
-         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.
+           codePoints = arrayFrom(input);
 
+           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;
 
-         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);
-         }
+               case SCHEME:
+                 if (chr && (exec(ALPHANUMERIC, chr) || chr == '+' || chr == '-' || chr == '.')) {
+                   buffer += toLowerCase(chr);
+                 } else if (chr == ':') {
+                   if (stateOverride && (
+                     (url.isSpecial() != hasOwn(specialSchemes, buffer)) ||
+                     (buffer == 'file' && (url.includesCredentials() || url.port !== null)) ||
+                     (url.scheme == 'file' && !url.host)
+                   )) return;
+                   url.scheme = buffer;
+                   if (stateOverride) {
+                     if (url.isSpecial() && specialSchemes[url.scheme] == url.port) url.port = null;
+                     return;
+                   }
+                   buffer = '';
+                   if (url.scheme == 'file') {
+                     state = FILE;
+                   } else if (url.isSpecial() && base && base.scheme == url.scheme) {
+                     state = SPECIAL_RELATIVE_OR_AUTHORITY;
+                   } else if (url.isSpecial()) {
+                     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;
 
-         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
+               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;
 
-             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
+               case SPECIAL_RELATIVE_OR_AUTHORITY:
+                 if (chr == '/' && codePoints[pointer + 1] == '/') {
+                   state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+                   pointer++;
+                 } else {
+                   state = RELATIVE;
+                   continue;
+                 } break;
 
-           targets.exit().remove(); // enter/update
+               case PATH_OR_AUTHORITY:
+                 if (chr == '/') {
+                   state = AUTHORITY;
+                   break;
+                 } else {
+                   state = PATH;
+                   continue;
+                 }
 
-           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);
-         }
+               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 == '\\' && url.isSpecial())) {
+                   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;
 
-         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..
+               case RELATIVE_SLASH:
+                 if (url.isSpecial() && (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 renderAsPoint(entity) {
-             return entity.geometry(graph) === 'point' && !(zoom >= 18 && entity.directions(graph, projection).length);
-           } // All points will render as vertices in wireframe mode too..
+               case SPECIAL_AUTHORITY_SLASHES:
+                 state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+                 if (chr != '/' || charAt(buffer, pointer + 1) != '/') continue;
+                 pointer++;
+                 break;
 
+               case SPECIAL_AUTHORITY_IGNORE_SLASHES:
+                 if (chr != '/' && chr != '\\') {
+                   state = AUTHORITY;
+                   continue;
+                 } break;
+
+               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 == '\\' && url.isSpecial())
+                 ) {
+                   if (seenAt && buffer == '') return INVALID_AUTHORITY;
+                   pointer -= arrayFrom(buffer).length + 1;
+                   buffer = '';
+                   state = HOST;
+                 } else buffer += chr;
+                 break;
 
-           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..
+               case HOST:
+               case HOSTNAME:
+                 if (stateOverride && url.scheme == 'file') {
+                   state = FILE_HOST;
+                   continue;
+                 } else if (chr == ':' && !seenBracket) {
+                   if (buffer == '') return INVALID_HOST;
+                   failure = url.parseHost(buffer);
+                   if (failure) return failure;
+                   buffer = '';
+                   state = PORT;
+                   if (stateOverride == HOSTNAME) return;
+                 } else if (
+                   chr == EOF || chr == '/' || chr == '?' || chr == '#' ||
+                   (chr == '\\' && url.isSpecial())
+                 ) {
+                   if (url.isSpecial() && buffer == '') return INVALID_HOST;
+                   if (stateOverride && buffer == '' && (url.includesCredentials() || url.port !== null)) return;
+                   failure = url.parseHost(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 == '\\' && url.isSpecial()) ||
+                   stateOverride
+                 ) {
+                   if (buffer != '') {
+                     var port = parseInt$1(buffer, 10);
+                     if (port > 0xFFFF) return INVALID_PORT;
+                     url.port = (url.isSpecial() && port === specialSchemes[url.scheme]) ? null : port;
+                     buffer = '';
+                   }
+                   if (stateOverride) return;
+                   state = PATH_START;
+                   continue;
+                 } else return INVALID_PORT;
+                 break;
 
-           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
+               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);
+                       url.shortenPath();
+                     }
+                     state = PATH;
+                     continue;
+                   }
+                 } else {
+                   state = PATH;
+                   continue;
+                 } break;
 
-           groups.select('.stroke'); // propagate bound data
+               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;
 
-           groups.select('.icon') // propagate bound data
-           .attr('xlink:href', function (entity) {
-             var preset = _mainPresetIndex.match(entity, graph);
-             var picon = preset && preset.icon;
+               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 = url.parseHost(buffer);
+                     if (failure) return failure;
+                     if (url.host == 'localhost') url.host = '';
+                     if (stateOverride) return;
+                     buffer = '';
+                     state = PATH_START;
+                   } continue;
+                 } else buffer += chr;
+                 break;
 
-             if (!picon) {
-               return '';
-             } else {
-               var isMaki = /^maki-/.test(picon);
-               return '#' + picon + (isMaki ? '-11' : '');
+               case PATH_START:
+                 if (url.isSpecial()) {
+                   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;
+
+               case PATH:
+                 if (
+                   chr == EOF || chr == '/' ||
+                   (chr == '\\' && url.isSpecial()) ||
+                   (!stateOverride && (chr == '?' || chr == '#'))
+                 ) {
+                   if (isDoubleDot(buffer)) {
+                     url.shortenPath();
+                     if (chr != '/' && !(chr == '\\' && url.isSpecial())) {
+                       push(url.path, '');
+                     }
+                   } else if (isSingleDot(buffer)) {
+                     if (chr != '/' && !(chr == '\\' && url.isSpecial())) {
+                       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;
+
+               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;
+
+               case QUERY:
+                 if (!stateOverride && chr == '#') {
+                   url.fragment = '';
+                   state = FRAGMENT;
+                 } else if (chr != EOF) {
+                   if (chr == "'" && url.isSpecial()) url.query += '%27';
+                   else if (chr == '#') url.query += '%23';
+                   else url.query += percentEncode(chr, C0ControlPercentEncodeSet);
+                 } break;
+
+               case FRAGMENT:
+                 if (chr != EOF) url.fragment += percentEncode(chr, fragmentPercentEncodeSet);
+                 break;
              }
-           }); // Draw touch targets..
 
-           touchLayer.call(drawTargets, graph, points, filter);
+             pointer++;
+           }
+         },
+         // https://url.spec.whatwg.org/#host-parsing
+         parseHost: function (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;
+             this.host = result;
+           // opaque host
+           } else if (!this.isSpecial()) {
+             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);
+             }
+             this.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;
+             this.host = result;
+           }
+         },
+         // https://url.spec.whatwg.org/#cannot-have-a-username-password-port
+         cannotHaveUsernamePasswordPort: function () {
+           return !this.host || this.cannotBeABaseURL || this.scheme == 'file';
+         },
+         // https://url.spec.whatwg.org/#include-credentials
+         includesCredentials: function () {
+           return this.username != '' || this.password != '';
+         },
+         // https://url.spec.whatwg.org/#is-special
+         isSpecial: function () {
+           return hasOwn(specialSchemes, this.scheme);
+         },
+         // https://url.spec.whatwg.org/#shorten-a-urls-path
+         shortenPath: function () {
+           var path = this.path;
+           var pathSize = path.length;
+           if (pathSize && (this.scheme != 'file' || pathSize != 1 || !isWindowsDriveLetter(path[0], true))) {
+             path.length--;
+           }
+         },
+         // https://url.spec.whatwg.org/#concept-url-serializer
+         serialize: function () {
+           var url = 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 (url.includesCredentials()) {
+               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;
+         },
+         // https://url.spec.whatwg.org/#dom-url-href
+         setHref: function (href) {
+           var failure = this.parse(href);
+           if (failure) throw TypeError$1(failure);
+           this.searchParams.update();
+         },
+         // https://url.spec.whatwg.org/#dom-url-origin
+         getOrigin: function () {
+           var scheme = this.scheme;
+           var port = this.port;
+           if (scheme == 'blob') try {
+             return new URLConstructor(scheme.path[0]).origin;
+           } catch (error) {
+             return 'null';
+           }
+           if (scheme == 'file' || !this.isSpecial()) return 'null';
+           return scheme + '://' + serializeHost(this.host) + (port !== null ? ':' + port : '');
+         },
+         // https://url.spec.whatwg.org/#dom-url-protocol
+         getProtocol: function () {
+           return this.scheme + ':';
+         },
+         setProtocol: function (protocol) {
+           this.parse($toString(protocol) + ':', SCHEME_START);
+         },
+         // https://url.spec.whatwg.org/#dom-url-username
+         getUsername: function () {
+           return this.username;
+         },
+         setUsername: function (username) {
+           var codePoints = arrayFrom($toString(username));
+           if (this.cannotHaveUsernamePasswordPort()) return;
+           this.username = '';
+           for (var i = 0; i < codePoints.length; i++) {
+             this.username += percentEncode(codePoints[i], userinfoPercentEncodeSet);
+           }
+         },
+         // https://url.spec.whatwg.org/#dom-url-password
+         getPassword: function () {
+           return this.password;
+         },
+         setPassword: function (password) {
+           var codePoints = arrayFrom($toString(password));
+           if (this.cannotHaveUsernamePasswordPort()) return;
+           this.password = '';
+           for (var i = 0; i < codePoints.length; i++) {
+             this.password += percentEncode(codePoints[i], userinfoPercentEncodeSet);
+           }
+         },
+         // https://url.spec.whatwg.org/#dom-url-host
+         getHost: function () {
+           var host = this.host;
+           var port = this.port;
+           return host === null ? ''
+             : port === null ? serializeHost(host)
+             : serializeHost(host) + ':' + port;
+         },
+         setHost: function (host) {
+           if (this.cannotBeABaseURL) return;
+           this.parse(host, HOST);
+         },
+         // https://url.spec.whatwg.org/#dom-url-hostname
+         getHostname: function () {
+           var host = this.host;
+           return host === null ? '' : serializeHost(host);
+         },
+         setHostname: function (hostname) {
+           if (this.cannotBeABaseURL) return;
+           this.parse(hostname, HOSTNAME);
+         },
+         // https://url.spec.whatwg.org/#dom-url-port
+         getPort: function () {
+           var port = this.port;
+           return port === null ? '' : $toString(port);
+         },
+         setPort: function (port) {
+           if (this.cannotHaveUsernamePasswordPort()) return;
+           port = $toString(port);
+           if (port == '') this.port = null;
+           else this.parse(port, PORT);
+         },
+         // https://url.spec.whatwg.org/#dom-url-pathname
+         getPathname: function () {
+           var path = this.path;
+           return this.cannotBeABaseURL ? path[0] : path.length ? '/' + join(path, '/') : '';
+         },
+         setPathname: function (pathname) {
+           if (this.cannotBeABaseURL) return;
+           this.path = [];
+           this.parse(pathname, PATH_START);
+         },
+         // https://url.spec.whatwg.org/#dom-url-search
+         getSearch: function () {
+           var query = this.query;
+           return query ? '?' + query : '';
+         },
+         setSearch: function (search) {
+           search = $toString(search);
+           if (search == '') {
+             this.query = null;
+           } else {
+             if ('?' == charAt(search, 0)) search = stringSlice(search, 1);
+             this.query = '';
+             this.parse(search, QUERY);
+           }
+           this.searchParams.update();
+         },
+         // https://url.spec.whatwg.org/#dom-url-searchparams
+         getSearchParams: function () {
+           return this.searchParams.facade;
+         },
+         // https://url.spec.whatwg.org/#dom-url-hash
+         getHash: function () {
+           var fragment = this.fragment;
+           return fragment ? '#' + fragment : '';
+         },
+         setHash: function (hash) {
+           hash = $toString(hash);
+           if (hash == '') {
+             this.fragment = null;
+             return;
+           }
+           if ('#' == charAt(hash, 0)) hash = stringSlice(hash, 1);
+           this.fragment = '';
+           this.parse(hash, FRAGMENT);
+         },
+         update: function () {
+           this.query = this.searchParams.serialize() || null;
          }
+       };
 
-         return drawPoints;
-       }
-
-       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;
+       // `URL` constructor
+       // https://url.spec.whatwg.org/#url-class
+       var URLConstructor = function URL(url /* , base */) {
+         var that = anInstance(this, URLPrototype);
+         var base = validateArgumentsLength(arguments.length, 1) > 1 ? arguments[1] : undefined;
+         var state = setInternalState(that, new URLState(url, false, base));
+         if (!DESCRIPTORS) {
+           that.href = state.serialize();
+           that.origin = state.getOrigin();
+           that.protocol = state.getProtocol();
+           that.username = state.getUsername();
+           that.password = state.getPassword();
+           that.host = state.getHost();
+           that.hostname = state.getHostname();
+           that.port = state.getPort();
+           that.pathname = state.getPathname();
+           that.search = state.getSearch();
+           that.searchParams = state.getSearchParams();
+           that.hash = state.getHash();
          }
+       };
 
-         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
+       var URLPrototype = URLConstructor.prototype;
 
-             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 accessorDescriptor = function (getter, setter) {
+         return {
+           get: function () {
+             return getInternalURLState(this)[getter]();
+           },
+           set: setter && function (value) {
+             return getInternalURLState(this)[setter](value);
+           },
+           configurable: true,
+           enumerable: true
+         };
+       };
 
-             return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' + 'rotate(' + a * 180 / Math.PI + ')';
-           }
+       if (DESCRIPTORS) {
+         defineProperties(URLPrototype, {
+           // `URL.prototype.href` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-href
+           href: accessorDescriptor('serialize', 'setHref'),
+           // `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', 'setProtocol'),
+           // `URL.prototype.username` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-username
+           username: accessorDescriptor('getUsername', 'setUsername'),
+           // `URL.prototype.password` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-password
+           password: accessorDescriptor('getPassword', 'setPassword'),
+           // `URL.prototype.host` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-host
+           host: accessorDescriptor('getHost', 'setHost'),
+           // `URL.prototype.hostname` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-hostname
+           hostname: accessorDescriptor('getHostname', 'setHostname'),
+           // `URL.prototype.port` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-port
+           port: accessorDescriptor('getPort', 'setPort'),
+           // `URL.prototype.pathname` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-pathname
+           pathname: accessorDescriptor('getPathname', 'setPathname'),
+           // `URL.prototype.search` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-search
+           search: accessorDescriptor('getSearch', 'setSearch'),
+           // `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', 'setHash')
+         });
+       }
 
-           var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
-           var touchLayer = selection.selectAll('.layer-touch.turns'); // Draw turns..
+       // `URL.prototype.toJSON` method
+       // https://url.spec.whatwg.org/#dom-url-tojson
+       redefine(URLPrototype, 'toJSON', function toJSON() {
+         return getInternalURLState(this).serialize();
+       }, { enumerable: true });
 
-           var groups = drawLayer.selectAll('g.turn').data(turns, function (d) {
-             return d.key;
-           }); // exit
+       // `URL.prototype.toString` method
+       // https://url.spec.whatwg.org/#URL-stringification-behavior
+       redefine(URLPrototype, 'toString', function toString() {
+         return getInternalURLState(this).serialize();
+       }, { enumerable: true });
 
-           groups.exit().remove(); // enter
+       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));
+       }
 
-           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
+       setToStringTag(URLConstructor, 'URL');
 
-           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
+       $({ global: true, forced: !USE_NATIVE_URL, sham: !DESCRIPTORS }, {
+         URL: URLConstructor
+       });
 
-           groups.select('circle'); // propagate bound data
-           // Draw touch targets..
+       function uiFieldText(field, context) {
+         var dispatch = dispatch$8('change');
+         var input = select(null);
+         var outlinkButton = select(null);
+         var wrap = select(null);
+         var _entityIDs = [];
 
-           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-           groups = touchLayer.selectAll('g.turn').data(turns, function (d) {
-             return d.key;
-           }); // exit
+         var _tags;
 
-           groups.exit().remove(); // enter
+         var _phoneFormats = {};
 
-           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;
+         if (field.type === 'tel') {
+           _mainFileFetcher.get('phone_formats').then(function (d) {
+             _phoneFormats = d;
+             updatePhonePlaceholder();
+           })["catch"](function () {
+             /* ignore */
            });
-           uEnter.append('circle').attr('class', 'target ' + fillClass).attr('r', '16'); // update
+         }
 
-           groups = groups.merge(groupsEnter).attr('transform', turnTransform);
-           groups.select('rect'); // propagate bound data
+         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
 
-           groups.select('circle'); // propagate bound data
+             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
 
-           return this;
-         }
+             var which = field.id; // 'brand', 'network', 'operator', 'flag'
 
-         return drawTurns;
-       }
+             return isSuggestion && !!entity.tags[which] && !!entity.tags[which + ':wikidata'];
+           });
 
-       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]
-         };
+           field.locked(isLocked);
+         }
 
-         var _currHoverTarget;
+         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());
 
-         var _currPersistent = {};
-         var _currHover = {};
-         var _prevHover = {};
-         var _currSelected = {};
-         var _prevSelected = {};
-         var _radii = {};
+           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 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.
+               if (domainResults.length >= 2 && domainResults[1]) {
+                 var domain = domainResults[1];
+                 return _t('icons.view_on', {
+                   domain: domain
+                 });
+               }
 
+               return '';
+             }).on('click', function (d3_event) {
+               d3_event.preventDefault();
+               var value = validIdentifierValueForLink();
 
-         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 (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 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 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;
+           }
 
-           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)
+           return true;
+         }
 
+         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');
 
-           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;
+           if (colour === '') {
+             outlinkButton = outlinkButton.call(svgIcon('#iD-icon-edit'));
            }
 
-           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
+           outlinkButton.on('click', function () {
+             return wrap.select('.colour-selector').node().click();
+           }).merge(outlinkButton);
+         }
+
+         function updatePhonePlaceholder() {
+           if (input.empty() || !Object.keys(_phoneFormats).length) return;
+           var extent = combinedEntityExtent();
+           var countryCode = extent && iso1A2Code(extent.center());
+
+           var format = countryCode && _phoneFormats[countryCode.toLowerCase()];
+
+           if (format) input.attr('placeholder', format);
+         }
+
+         function validIdentifierValueForLink() {
+           var value = utilGetSetValue(input).trim();
+
+           if (field.type === 'url' && value) {
+             try {
+               return new URL(value).href;
+             } catch (e) {
+               return null;
+             }
+           }
 
-                 if (entity.id !== activeID && entity.isEndpoint(graph) && !entity.isConnected(graph)) {
-                   r += 1.5;
-                 }
+           if (field.type === 'identifier' && field.pattern) {
+             return value && value.match(new RegExp(field.pattern))[0];
+           }
 
-                 if (klass === 'shadow') {
-                   // remember this value, so we don't need to
-                   _radii[entity.id] = r; // recompute it when we draw the touch targets
-                 }
+           return null;
+         } // clamp number to min/max
 
-                 select(this).attr('r', r).attr('visibility', i && klass === 'fill' ? 'hidden' : null);
-               });
-             });
-           }
 
-           vertices.sort(sortY);
-           var groups = selection.selectAll('g.vertex').filter(filter).data(vertices, fastEntityKey); // exit
+         function clamped(num) {
+           if (field.minValue !== undefined) {
+             num = Math.max(num, field.minValue);
+           }
 
-           groups.exit().remove(); // enter
+           if (field.maxValue !== undefined) {
+             num = Math.min(num, field.maxValue);
+           }
 
-           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.
+           return num;
+         }
 
-           enter.filter(function (d) {
-             return d.hasInterestingTags();
-           }).append('circle').attr('class', 'fill'); // update
+         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
 
-           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 (!val && Array.isArray(_tags[field.key])) return;
 
-           var iconUse = groups.selectAll('.icon').data(function data(d) {
-             return zoom >= 17 && getIcon(d) ? [d] : [];
-           }, fastEntityKey); // exit
+             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(';');
+               }
 
-           iconUse.exit().remove(); // enter
+               utilGetSetValue(input, val);
+             }
 
-           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
+             t[field.key] = val || undefined;
+             dispatch.call('change', this, t, onInput);
+           };
+         }
 
-           var dgroups = groups.selectAll('.viewfieldgroup').data(function data(d) {
-             return zoom >= 18 && getDirections(d) ? [d] : [];
-           }, fastEntityKey); // exit
+         i.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return i;
+         };
 
-           dgroups.exit().remove(); // enter/update
+         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();
 
-           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
+           if (outlinkButton && !outlinkButton.empty()) {
+             var disabled = !validIdentifierValueForLink();
+             outlinkButton.classed('disabled', disabled);
+           }
+         };
 
-           viewfields.exit().remove(); // enter/update
+         i.focus = function () {
+           var node = input.node();
+           if (node) node.focus();
+         };
 
-           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 + ')';
-           });
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
          }
 
-         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
+         return utilRebind(i, dispatch, 'on');
+       }
 
-             var vertexType = svgPassiveVertex(node, graph, activeID);
+       function uiFieldAccess(field, context) {
+         var dispatch = dispatch$8('change');
+         var items = select(null);
 
-             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
+         var _tags;
 
-           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
+         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
 
-           targets.exit().remove(); // enter/update
+           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
 
-           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
+           items = items.merge(enter);
+           wrap.selectAll('.preset-input-access').on('change', change).on('blur', change);
+         }
 
-           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
+         function change(d3_event, d) {
+           var tag = {};
+           var value = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
 
-           nopes.exit().remove(); // enter/update
+           if (!value && typeof _tags[d] !== 'string') return;
+           tag[d] = value || undefined;
+           dispatch.call('change', this, tag);
+         }
 
-           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
+         access.options = function (type) {
+           var options = ['no', 'permissive', 'private', 'permit', 'destination', 'customers', 'unknown'];
 
+           if (type !== 'access') {
+             options.unshift('yes');
+             options.push('designated');
 
-         function renderAsVertex(entity, graph, wireframe, zoom) {
-           var geometry = entity.geometry(graph);
-           return geometry === 'vertex' || geometry === 'point' && (wireframe || zoom >= 18 && entity.directions(graph, projection).length);
-         }
+             if (type === 'bicycle') {
+               options.push('dismount');
+             }
+           }
 
-         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);
-         }
+           return options.map(function (option) {
+             return {
+               title: field.t('options.' + option + '.description'),
+               value: option
+             };
+           });
+         };
 
-         function getSiblingAndChildVertices(ids, graph, wireframe, zoom) {
-           var results = {};
-           var seenIds = {};
+         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'
+           }
+         };
 
-           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);
+         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 (!context.features().isHiddenFeature(entity, graph, geometry)) {
-               var i;
+             if (d === 'access') {
+               return 'yes';
+             }
 
-               if (entity.type === 'way') {
-                 for (i = 0; i < entity.nodes.length; i++) {
-                   var child = graph.hasEntity(entity.nodes[i]);
+             if (tags.access && typeof tags.access === 'string') {
+               return tags.access;
+             }
 
-                   if (child) {
-                     addChildVertices(child);
-                   }
+             if (tags.highway) {
+               if (typeof tags.highway === 'string') {
+                 if (placeholdersByHighway[tags.highway] && placeholdersByHighway[tags.highway][d]) {
+                   return placeholdersByHighway[tags.highway][d];
                  }
-               } else if (entity.type === 'relation') {
-                 for (i = 0; i < entity.members.length; i++) {
-                   var member = graph.hasEntity(entity.members[i].id);
+               } else {
+                 var impliedAccesses = tags.highway.filter(Boolean).map(function (highwayVal) {
+                   return placeholdersByHighway[highwayVal] && placeholdersByHighway[highwayVal][d];
+                 }).filter(Boolean);
 
-                   if (member) {
-                     addChildVertices(member);
-                   }
+                 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];
                  }
-               } else if (renderAsVertex(entity, graph, wireframe, zoom)) {
-                 results[entity.id] = entity;
                }
              }
-           }
-
-           ids.forEach(function (id) {
-             var entity = graph.hasEntity(id);
-             if (!entity) return;
 
-             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 field.placeholder();
            });
-           return results;
-         }
+         };
 
-         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');
+         access.focus = function () {
+           items.selectAll('.preset-input-access').node().focus();
+         };
 
-           if (fullRedraw) {
-             _currPersistent = {};
-             _radii = {};
-           } // Collect important vertices from the `entities` list..
-           // (during a partial redraw, it will not contain everything)
+         return utilRebind(access, dispatch, 'on');
+       }
 
+       function uiFieldAddress(field, context) {
+         var dispatch = dispatch$8('change');
 
-           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 _selection = select(null);
 
-             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..
+         var _wrap = select(null);
 
+         var addrField = _mainPresetIndex.field('address'); // needed for placeholder strings
 
-             if (!keep && !fullRedraw) {
-               delete _currPersistent[entity.id];
+         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 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 isAddressable(d) {
+             return d.tags.highway && d.tags.name && d.type === 'way';
+           }
+         }
+
+         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');
+
+           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;
              }
-           } // 3 sets of vertices to consider:
 
+             if (d.tags['addr:city']) return true;
+             return false;
+           }
+         }
+
+         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 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 updateForCountryCode() {
+           if (!_countryCode) return;
+           var addressFormat;
 
-           };
-           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.
+           for (var i = 0; i < _addressFormats.length; i++) {
+             var format = _addressFormats[i];
 
-           var filterRendered = function filterRendered(d) {
-             return d.id in _currPersistent || d.id in _currSelected || d.id in _currHover || filter(d);
-           };
+             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
 
-           drawLayer.call(draw, graph, currentVisible(all), sets, filterRendered); // Draw touch targets..
-           // When drawing, render all targets (not just those affected by a partial redraw)
+               break;
+             }
+           }
 
-           var filterTouch = function filterTouch(d) {
-             return isMoving ? true : filterRendered(d);
+           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
            };
 
-           touchLayer.call(drawTargets, graph, currentVisible(all), filterTouch);
-
-           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);
+           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
+               };
              });
            }
-         } // partial redraw - only update the selected items..
 
+           var rows = _wrap.selectAll('.addr-row').data(addressFormat.format, function (d) {
+             return d.toString();
+           });
 
-         drawVertices.drawSelected = function (selection, graph, extent) {
-           var wireframe = context.surface().classed('fill-wireframe');
-           var zoom = geoScaleToZoom(projection.scale());
-           _prevSelected = _currSelected || {};
+           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 (context.map().isInWideSelection()) {
-             _currSelected = {};
-             context.selectedIDs().forEach(function (id) {
-               var entity = graph.hasEntity(id);
-               if (!entity) return;
+           function addDropdown(d) {
+             if (dropdowns.indexOf(d.id) === -1) return; // not a dropdown
 
-               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..
+             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));
+             }));
+           }
 
+           _wrap.selectAll('input').on('blur', change()).on('change', change());
 
-           var filter = function filter(d) {
-             return d.id in _prevSelected;
-           };
+           _wrap.selectAll('input:not(.combobox-input)').on('input', change(true));
 
-           drawVertices(selection, graph, Object.values(_prevSelected), filter, extent, false);
-         }; // partial redraw - only update the hovered items..
+           if (_tags) updateTags(_tags);
+         }
 
+         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();
 
-         drawVertices.drawHover = function (selection, graph, target, extent) {
-           if (target === _currHoverTarget) return; // continue only if something changed
+           if (extent) {
+             var countryCode;
 
-           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 (context.inIntro()) {
+               // localize the address format for the walkthrough
+               countryCode = _t('intro.graph.countrycode');
+             } else {
+               var center = extent.center();
+               countryCode = iso1A2Code(center);
+             }
 
-           if (entity) {
-             _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
-           } else {
-             _currHover = {};
-           } // note that drawVertices will add `_currHover` automatically if needed..
+             if (countryCode) {
+               _countryCode = countryCode.toLowerCase();
+               updateForCountryCode();
+             }
+           }
+         }
 
+         function change(onInput) {
+           return function () {
+             var tags = {};
 
-           var filter = function filter(d) {
-             return d.id in _prevHover;
-           };
+             _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
 
-           drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
-         };
+               if (Array.isArray(_tags[key]) && !value) return;
+               tags[key] = value || undefined;
+             });
 
-         return drawVertices;
-       }
+             dispatch.call('change', this, tags, onInput);
+           };
+         }
 
-       function utilBindOnce(target, type, listener, capture) {
-         var typeOnce = type + '.once';
+         function updatePlaceholder(inputSelection) {
+           return inputSelection.attr('placeholder', function (subfield) {
+             if (_tags && Array.isArray(_tags[field.key + ':' + subfield.id])) {
+               return _t('inspector.multiple_values');
+             }
 
-         function one() {
-           target.on(typeOnce, null);
-           listener.apply(this, arguments);
+             if (_countryCode) {
+               var localkey = subfield.id + '!' + _countryCode;
+               var tkey = addrField.hasTextForStringId('placeholders.' + localkey) ? localkey : subfield.id;
+               return addrField.t('placeholders.' + tkey);
+             }
+           });
          }
 
-         target.on(typeOnce, one, capture);
-         return this;
-       }
+         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);
+         }
 
-       function defaultFilter$2(d3_event) {
-         return !d3_event.ctrlKey && !d3_event.button;
-       }
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }
 
-       function defaultExtent$1() {
-         var e = this;
+         address.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return address;
+         };
 
-         if (e instanceof SVGElement) {
-           e = e.ownerSVGElement || e;
+         address.tags = function (tags) {
+           _tags = tags;
+           updateTags(tags);
+         };
 
-           if (e.hasAttribute('viewBox')) {
-             e = e.viewBox.baseVal;
-             return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
-           }
+         address.focus = function () {
+           var node = _wrap.selectAll('input').node();
 
-           return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
-         }
+           if (node) node.focus();
+         };
 
-         return [[0, 0], [e.clientWidth, e.clientHeight]];
+         return utilRebind(address, dispatch, 'on');
        }
 
-       function defaultWheelDelta$1(d3_event) {
-         return -d3_event.deltaY * (d3_event.deltaMode === 1 ? 0.05 : d3_event.deltaMode ? 1 : 0.002);
-       }
+       function uiFieldCycleway(field, context) {
+         var dispatch = dispatch$8('change');
+         var items = select(null);
+         var wrap = select(null);
 
-       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));
-       }
+         var _tags;
 
-       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;
+         function cycleway(selection) {
+           function stripcolon(s) {
+             return s.replace(':', '');
+           }
 
-         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);
+           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
+
+           wrap.selectAll('.preset-input-cycleway').on('change', change).on('blur', change);
          }
 
-         zoom.transform = function (collection, transform, point) {
-           var selection = collection.selection ? collection.selection() : collection;
+         function change(d3_event, key) {
+           var newValue = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
 
-           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);
-             });
-           }
-         };
+           if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) return;
 
-         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);
-         };
+           if (newValue === 'none' || newValue === '') {
+             newValue = undefined;
+           }
 
-         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);
-         };
+           var otherKey = key === 'cycleway:left' ? 'cycleway:right' : 'cycleway:left';
+           var otherValue = typeof _tags.cycleway === 'string' ? _tags.cycleway : _tags[otherKey];
 
-         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 (otherValue && Array.isArray(otherValue)) {
+             // we must always have an explicit value for comparison
+             otherValue = otherValue[0];
+           }
 
-         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 (otherValue === 'none' || otherValue === '') {
+             otherValue = undefined;
+           }
 
-         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);
-         }
+           var tag = {}; // If the left and right tags match, use the cycleway tag to tag both
+           // sides the same way
 
-         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 (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 centroid(extent) {
-           return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+           dispatch.call('change', this, tag);
          }
 
-         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);
+         cycleway.options = function () {
+           return field.options.map(function (option) {
+             return {
+               title: field.t('options.' + option + '.description'),
+               value: option
              };
            });
-         }
+         };
 
-         function gesture(that, args, clean) {
-           return !clean && _activeGesture || new Gesture(that, args);
-         }
+         cycleway.tags = function (tags) {
+           _tags = tags; // If cycleway is set, use that instead of individual values
 
-         function Gesture(that, args) {
-           this.that = that;
-           this.args = args;
-           this.active = 0;
-           this.extent = extent.apply(that, args);
-         }
+           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 = [];
 
-         Gesture.prototype = {
-           start: function start(d3_event) {
-             if (++this.active === 1) {
-               _activeGesture = this;
-               dispatch$1.call('start', this, d3_event);
+               if (Array.isArray(tags.cycleway)) {
+                 vals = vals.concat(tags.cycleway);
+               }
+
+               if (Array.isArray(tags[d])) {
+                 vals = vals.concat(tags[d]);
+               }
+
+               return vals.filter(Boolean).join('\n');
              }
 
-             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);
+             return null;
+           }).attr('placeholder', function (d) {
+             if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
+               return _t('inspector.multiple_values');
              }
 
-             return this;
-           }
+             return field.placeholder();
+           }).classed('mixed', function (d) {
+             return Array.isArray(tags.cycleway) || Array.isArray(tags[d]);
+           });
          };
 
-         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.
+         cycleway.focus = function () {
+           var node = wrap.selectAll('input').node();
+           if (node) node.focus();
+         };
 
-           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);
-             }
+         return utilRebind(cycleway, dispatch, 'on');
+       }
 
-             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);
-           }
+       function uiFieldLanes(field, context) {
+         var dispatch = dispatch$8('change');
+         var LANE_WIDTH = 40;
+         var LANE_HEIGHT = 200;
+         var _entityIDs = [];
 
-           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 lanes(selection) {
+           var lanesData = context.entity(_entityIDs[0]).lanes();
 
-           function wheelidled() {
-             g.wheel = null;
-             g.end(d3_event);
+           if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
+             selection.call(lanes.off);
+             return;
            }
+
+           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';
+           });
          }
 
-         var _downPointerIDs = new Set();
+         lanes.entityIDs = function (val) {
+           _entityIDs = val;
+         };
 
-         var _pointerLocGetter;
+         lanes.tags = function () {};
 
-         function pointerdown(d3_event) {
-           _downPointerIDs.add(d3_event.pointerId);
+         lanes.focus = function () {};
 
-           if (!filter.apply(this, arguments)) return;
-           var g = gesture(this, arguments, _downPointerIDs.size === 1);
-           var started;
-           d3_event.stopImmediatePropagation();
-           _pointerLocGetter = utilFastMouse(this);
+         lanes.off = function () {};
 
-           var loc = _pointerLocGetter(d3_event);
+         return utilRebind(lanes, dispatch, 'on');
+       }
+       uiFieldLanes.supportsMultiselection = false;
+
+       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 p = [loc, _transform.invert(loc), d3_event.pointerId];
+         var _countryCode;
 
-           if (!g.pointer0) {
-             g.pointer0 = p;
-             started = true;
-           } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
-             g.pointer1 = p;
-           }
+         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.
 
-           if (started) {
-             interrupt(this);
-             g.start(d3_event);
-           }
-         }
 
-         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;
+         _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
 
-           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;
-           }
+         var langCombo = uiCombobox(context, 'localized-lang').fetcher(fetchLanguages).minItems(0);
 
-           d3_event.preventDefault();
-           d3_event.stopImmediatePropagation();
+         var _selection = select(null);
 
-           var loc = _pointerLocGetter(d3_event);
+         var _multilingual = [];
 
-           var t, p, l;
-           if (isPointer0) g.pointer0[0] = loc;else if (isPointer1) g.pointer1[0] = loc;
-           t = _transform;
+         var _buttonTip = uiTooltip().title(_t.html('translate.translate')).placement('left');
 
-           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 _wikiTitles;
 
-           g.zoom(d3_event, 'touch', constrain(translate(t, p, l), g.extent, translateExtent));
-         }
+         var _entityIDs = [];
 
-         function pointerup(d3_event) {
-           if (!_downPointerIDs.has(d3_event.pointerId)) return;
+         function loadLanguagesArray(dataLanguages) {
+           if (_languagesArray.length !== 0) return; // some conversion is needed to ensure correct OSM tags are used
 
-           _downPointerIDs["delete"](d3_event.pointerId);
+           var replacements = {
+             sr: 'sr-Cyrl',
+             // in OSM, `sr` implies Cyrillic
+             'sr-Cyrl': false // `sr-Cyrl` isn't used in OSM
 
-           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 (g.pointer1 && !g.pointer0) {
-             g.pointer0 = g.pointer1;
-             delete g.pointer1;
-           }
+           for (var code in dataLanguages) {
+             if (replacements[code] === false) continue;
+             var metaCode = code;
+             if (replacements[code]) metaCode = replacements[code];
 
-           if (g.pointer0) g.pointer0[1] = _transform.invert(g.pointer0[0]);else {
-             g.end(d3_event);
+             _languagesArray.push({
+               localName: _mainLocalizer.languageName(metaCode, {
+                 localOnly: true
+               }),
+               nativeName: dataLanguages[metaCode].nativeName,
+               code: code,
+               label: _mainLocalizer.languageName(metaCode)
+             });
            }
          }
 
-         zoom.wheelDelta = function (_) {
-           return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
-         };
+         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
 
-         zoom.filter = function (_) {
-           return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
-         };
+             if (entity.tags.wikidata) return true; // Assume the name has already been confirmed if its source has been researched
 
-         zoom.extent = function (_) {
-           return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
-         };
+             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`
 
-         zoom.scaleExtent = function (_) {
-           return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
-         };
+             var preset = _mainPresetIndex.match(entity, context.graph());
 
-         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 (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);
+             }
 
-         zoom.constrain = function (_) {
-           return arguments.length ? (constrain = _, zoom) : constrain;
-         };
+             return false;
+           });
 
-         zoom.interpolate = function (_) {
-           return arguments.length ? (interpolate = _, zoom) : interpolate;
-         };
+           field.locked(isLocked);
+         } // update _multilingual, maintaining the existing order
 
-         zoom._transform = function (_) {
-           return arguments.length ? (_transform = _, zoom) : _transform;
-         };
 
-         return utilRebind(zoom, dispatch$1, 'on');
-       }
+         function calcMultilingual(tags) {
+           var existingLangsOrdered = _multilingual.map(function (item) {
+             return item.lang;
+           });
 
-       // if pointer events are supported. Falls back to default `dblclick` event.
+           var existingLangs = new Set(existingLangsOrdered.filter(Boolean));
 
-       function utilDoubleUp() {
-         var dispatch$1 = dispatch('doubleUp');
-         var _maxTimespan = 500; // milliseconds
+           for (var k in tags) {
+             var m = k.match(/^(.*):(.*)$/);
 
-         var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices
+             if (m && m[1] === field.key && m[2]) {
+               var item = {
+                 lang: m[2],
+                 value: tags[k]
+               };
 
-         var _pointer; // object representing the pointer that could trigger double up
+               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 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;
+           _multilingual.forEach(function (item) {
+             if (item.lang && existingLangs.has(item.lang)) {
+               item.value = '';
+             }
+           });
          }
 
-         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
-
-           if (_pointer && !pointerIsValidFor(loc)) {
-             // if this pointer is no longer valid, clear it so another can be started
-             _pointer = undefined;
-           }
-
-           if (!_pointer) {
-             _pointer = {
-               startLoc: loc,
-               startTime: new Date().getTime(),
-               upCount: 0,
-               pointerId: d3_event.pointerId
-             };
-           } else {
-             // double down
-             _pointer.pointerId = d3_event.pointerId;
-           }
-         }
+         function localized(selection) {
+           _selection = selection;
+           calcLocked();
+           var isLocked = field.locked();
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]); // enter/update
 
-         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;
+           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
 
-           if (_pointer.upCount === 2) {
-             // double up!
-             var loc = [d3_event.clientX, d3_event.clientY];
+           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);
 
-             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 (_tags && !_multilingual.length) {
+             calcMultilingual(_tags);
+           }
 
+           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);
 
-             _pointer = undefined;
-           }
-         }
+           function addNew(d3_event) {
+             d3_event.preventDefault();
+             if (field.locked()) return;
+             var defaultLang = _mainLocalizer.languageCode().toLowerCase();
 
-         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));
+             var langExists = _multilingual.find(function (datum) {
+               return datum.lang === defaultLang;
              });
-           }
-         }
 
-         doubleUp.off = function (selection) {
-           selection.on('pointerdown.doubleUp', null).on('pointerup.doubleUp', null).on('dblclick.doubleUp', null);
-         };
-
-         return utilRebind(doubleUp, dispatch$1, 'on');
-       }
+             var isLangEn = defaultLang.indexOf('en') > -1;
 
-       var TILESIZE = 256;
-       var minZoom = 2;
-       var maxZoom = 24;
-       var kMin = geoZoomToScale(minZoom, TILESIZE);
-       var kMax = geoZoomToScale(maxZoom, TILESIZE);
+             if (isLangEn || langExists) {
+               defaultLang = '';
+               langExists = _multilingual.find(function (datum) {
+                 return datum.lang === defaultLang;
+               });
+             }
 
-       function clamp(num, min, max) {
-         return Math.max(min, Math.min(num, max));
-       }
+             if (!langExists) {
+               // prepend the value so it appears at the top
+               _multilingual.unshift({
+                 lang: defaultLang,
+                 value: ''
+               });
 
-       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;
+               localizedInputs.call(renderMultilingual);
+             }
+           }
 
-         var _selection = select(null);
+           function change(onInput) {
+             return function (d3_event) {
+               if (field.locked()) {
+                 d3_event.preventDefault();
+                 return;
+               }
 
-         var supersurface = select(null);
-         var wrapper = select(null);
-         var surface = select(null);
-         var _dimensions = [1, 1];
-         var _dblClickZoomEnabled = true;
-         var _redrawEnabled = true;
+               var val = utilGetSetValue(select(this));
+               if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
 
-         var _gestureTransformStart;
+               if (!val && Array.isArray(_tags[field.key])) return;
+               var t = {};
+               t[field.key] = val || undefined;
+               dispatch.call('change', this, t, onInput);
+             };
+           }
+         }
 
-         var _transformStart = projection.transform();
+         function key(lang) {
+           return field.key + ':' + lang;
+         }
 
-         var _transformLast;
+         function changeLang(d3_event, d) {
+           var tags = {}; // make sure unrecognized suffixes are lowercase - #7156
 
-         var _isTransformed = false;
-         var _minzoom = 0;
+           var lang = utilGetSetValue(select(this)).toLowerCase();
 
-         var _getMouseCoords;
+           var language = _languagesArray.find(function (d) {
+             return d.label.toLowerCase() === lang || d.localName && d.localName.toLowerCase() === lang || d.nativeName && d.nativeName.toLowerCase() === lang;
+           });
 
-         var _lastPointerEvent;
+           if (language) lang = language.code;
 
-         var _lastWithinEditableZoom; // whether a pointerdown event started the zoom
+           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'));
 
-         var _pointerDown = false; // use pointer events on supported platforms; fallback to mouse events
+           if (newKey && value) {
+             tags[newKey] = value;
+           } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
+             tags[newKey] = _wikiTitles[d.lang];
+           }
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom
+           d.lang = lang;
+           dispatch.call('change', this, tags);
+         }
 
+         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
 
-         var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;
+           if (!value && Array.isArray(d.value)) return;
+           var t = {};
+           t[key(d.lang)] = value;
+           d.value = value;
+           dispatch.call('change', this, t);
+         }
 
-         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;
-         });
+         function fetchLanguages(value, cb) {
+           var v = value.toLowerCase(); // show the user's language first
 
-         var _doubleUpHandler = utilDoubleUp();
+           var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];
 
-         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 (_countryCode && _territoryLanguages[_countryCode]) {
+             langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
+           }
 
+           var langItems = [];
+           langCodes.forEach(function (code) {
+             var langItem = _languagesArray.find(function (item) {
+               return item.code === code;
+             });
 
-         function cancelPendingRedraw() {
-           scheduleRedraw.cancel(); // isRedrawScheduled = false;
-           // window.cancelIdleCallback(pendingRedrawCall);
+             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 map(selection) {
-           _selection = selection;
-           context.on('change.map', immediateRedraw);
-           var osm = context.connection();
+         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
 
-           if (osm) {
-             osm.on('change.map', immediateRedraw);
-           }
+               _multilingual.splice(_multilingual.indexOf(d), 1);
 
-           function didUndoOrRedo(targetTransform) {
-             var mode = context.mode().id;
-             if (mode !== 'browse' && mode !== 'select') return;
+               var langKey = d.lang && key(d.lang);
 
-             if (targetTransform) {
-               map.transformEase(targetTransform);
-             }
-           }
+               if (langKey && langKey in _tags) {
+                 delete _tags[langKey]; // remove from entity tags
 
-           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);
+                 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);
            });
-           context.background().on('change.map', immediateRedraw);
-           context.features().on('redraw.map', immediateRedraw);
-           drawLayers.on('change.map', function () {
-             context.background().updateImagery();
-             immediateRedraw();
+           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');
            });
-           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
+           entries = entries.merge(entriesEnter);
+           entries.order(); // allow removing the entry UIs even if there isn't a tag to remove
 
-           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
+           entries.classed('present', true);
+           utilGetSetValue(entries.select('.localized-lang'), function (d) {
+             var langItem = _languagesArray.find(function (item) {
+               return item.code === d.lang;
+             });
 
-           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 (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);
+           });
+         }
 
-             if (d3_event.button === 2) {
-               d3_event.stopPropagation();
-             }
-           }, true).on(_pointerPrefix + 'up.zoom', function (d3_event) {
-             _lastPointerEvent = d3_event;
+         localized.tags = function (tags) {
+           _tags = tags; // Fetch translations from wikipedia
 
-             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 (typeof tags.wikipedia === 'string' && !_wikiTitles) {
+             _wikiTitles = {};
+             var wm = tags.wikipedia.match(/([^:]+):(.+)/);
+
+             if (wm && wm[0] && wm[1]) {
+               wikipedia.translations(wm[1], wm[2], function (err, d) {
+                 if (err || !d) return;
+                 _wikiTitles = d;
                });
              }
-           });
-           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
+           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);
+         };
+
+         localized.focus = function () {
+           input.node().focus();
+         };
 
+         localized.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           _multilingual = [];
+           loadCountryCode();
+           return localized;
+         };
 
-           updateAreaFill();
+         function loadCountryCode() {
+           var extent = combinedEntityExtent();
+           var countryCode = extent && iso1A2Code(extent.center());
+           _countryCode = countryCode && countryCode.toLowerCase();
+         }
 
-           _doubleUpHandler.on('doubleUp.map', function (d3_event, p0) {
-             if (!_dblClickZoomEnabled) return; // don't zoom if targeting something other than the map itself
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }
 
-             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);
-           });
+         return utilRebind(localized, dispatch, 'on');
+       }
 
-           context.on('enter.map', function () {
-             if (!map.editableDataEnabled(true
-             /* skip zoom check */
-             )) return; // redraw immediately any objects affected by a change in selectedIDs.
+       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 = [];
 
-             var graph = context.graph();
-             var selectedAndParents = {};
-             context.selectedIDs().forEach(function (id) {
-               var entity = graph.hasEntity(id);
+         var _tags;
 
-               if (entity) {
-                 selectedAndParents[entity.id] = entity;
+         var _isImperial;
 
-                 if (entity.type === 'node') {
-                   graph.parentWays(entity).forEach(function (parent) {
-                     selectedAndParents[parent.id] = parent;
-                   });
-                 }
-               }
-             });
-             var data = Object.values(selectedAndParents);
+         var primaryUnits = [{
+           value: 'm',
+           title: _t('inspector.roadheight.meter')
+         }, {
+           value: 'ft',
+           title: _t('inspector.roadheight.foot')
+         }];
+         var unitCombo = uiCombobox(context, 'roadheight-unit').data(primaryUnits);
 
-             var filter = function filter(d) {
-               return d.id in selectedAndParents;
-             };
+         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);
 
-             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
+           function changeUnits() {
+             _isImperial = utilGetSetValue(primaryUnitInput) === 'ft';
+             utilGetSetValue(primaryUnitInput, _isImperial ? 'ft' : 'm');
+             setUnitSuggestions();
+             change();
+           }
+         }
 
-             scheduleRedraw();
-           });
-           map.dimensions(utilGetDimensions(selection));
+         function setUnitSuggestions() {
+           utilGetSetValue(primaryUnitInput, _isImperial ? 'ft' : 'm');
          }
 
-         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;
+         function change() {
+           var tag = {};
+           var primaryValue = utilGetSetValue(primaryInput).trim();
+           var secondaryValue = utilGetSetValue(secondaryInput).trim(); // don't override multiple values with blank string
 
-             for (var i = 0; i < listeners.length; i++) {
-               var listener = listeners[i];
+           if (!primaryValue && !secondaryValue && Array.isArray(_tags[field.key])) return;
 
-               if (listener.name === 'zoom' && listener.type === 'mouseup') {
-                 hasOrphan = true;
-                 break;
-               }
+           if (!primaryValue && !secondaryValue) {
+             tag[field.key] = undefined;
+           } else if (isNaN(primaryValue) || isNaN(secondaryValue) || !_isImperial) {
+             tag[field.key] = context.cleanTagValue(primaryValue);
+           } else {
+             if (primaryValue !== '') {
+               primaryValue = context.cleanTagValue(primaryValue + '\'');
              }
 
-             if (hasOrphan) {
-               var event = window.CustomEvent;
-
-               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.
-
-
-               event.view = window;
-               window.dispatchEvent(event);
+             if (secondaryValue !== '') {
+               secondaryValue = context.cleanTagValue(secondaryValue + '"');
              }
-           }
 
-           return d3_event.button !== 2; // ignore right clicks
-         }
+             tag[field.key] = primaryValue + secondaryValue;
+           }
 
-         function pxCenter() {
-           return [_dimensions[0] / 2, _dimensions[1] / 2];
+           dispatch.call('change', this, tag);
          }
 
-         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;
-
-           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
+         roadheight.tags = function (tags) {
+           _tags = tags;
+           var primaryValue = tags[field.key];
+           var secondaryValue;
+           var isMixed = Array.isArray(primaryValue);
 
-             applyFeatureLayerFilters = false;
-           } else if (difference) {
-             var complete = difference.complete(map.extent());
-             data = Object.values(complete).filter(Boolean);
-             set = new Set(Object.keys(complete));
+           if (!isMixed) {
+             if (primaryValue && (primaryValue.indexOf('\'') >= 0 || primaryValue.indexOf('"') >= 0)) {
+               secondaryValue = primaryValue.match(/(-?[\d.]+)"/);
 
-             filter = function filter(d) {
-               return set.has(d.id);
-             };
+               if (secondaryValue !== null) {
+                 secondaryValue = secondaryValue[1];
+               }
 
-             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;
-             }
+               primaryValue = primaryValue.match(/(-?[\d.]+)'/);
 
-             if (extent) {
-               data = context.history().intersects(map.extent().intersection(extent));
-               set = new Set(data.map(function (entity) {
-                 return entity.id;
-               }));
+               if (primaryValue !== null) {
+                 primaryValue = primaryValue[1];
+               }
 
-               filter = function filter(d) {
-                 return set.has(d.id);
-               };
-             } else {
-               data = all;
-               fullRedraw = true;
-               filter = utilFunctor(true);
+               _isImperial = true;
+             } else if (primaryValue) {
+               _isImperial = false;
              }
            }
 
-           if (applyFeatureLayerFilters) {
-             data = features.filter(data, graph);
-           } else {
-             context.features().resetStats();
-           }
+           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);
+         };
 
-           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());
-           }
+         roadheight.focus = function () {
+           primaryInput.node().focus();
+         };
 
-           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
-           });
+         roadheight.entityIDs = function (val) {
+           _entityIDs = val;
+         };
+
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
          }
 
-         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);
-         };
+         return utilRebind(roadheight, dispatch, 'on');
+       }
 
-         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();
+       function uiFieldRoadspeed(field, context) {
+         var dispatch = dispatch$8('change');
+         var unitInput = select(null);
+         var input = select(null);
+         var _entityIDs = [];
 
-           if (mode && !allowed[mode.id]) {
-             context.enter(modeBrowse(context));
-           }
+         var _tags;
 
-           dispatch$1.call('drawn', this, {
-             full: true
-           });
-         }
+         var _isImperial;
 
-         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
+         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];
 
-           e2._rotation = e.rotation; // preserve the original rotation
+         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);
 
-           _selection.node().dispatchEvent(e2);
+           function changeUnits() {
+             _isImperial = utilGetSetValue(unitInput) === 'mph';
+             utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
+             setUnitSuggestions();
+             change();
+           }
          }
 
-         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.
+         function setUnitSuggestions() {
+           speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
+           utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
+         }
 
-           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
+         function comboValues(d) {
+           return {
+             value: d.toString(),
+             title: d.toString()
+           };
+         }
 
-             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
+         function change() {
+           var tag = {};
+           var value = utilGetSetValue(input).trim(); // don't override multiple values with blank string
 
-               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
+           if (!value && Array.isArray(_tags[field.key])) return;
 
+           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');
+           }
 
-             if (x2 !== x || y2 !== y || k2 !== k) {
-               x = x2;
-               y = y2;
-               k = k2;
-               eventTransform = identity$2.translate(x2, y2).scale(k2);
+           dispatch.call('change', this, tag);
+         }
 
-               if (_zoomerPanner._transform) {
-                 // utilZoomPan interface
-                 _zoomerPanner._transform(eventTransform);
-               } else {
-                 // d3_zoom interface
-                 _selection.node().__zoom = eventTransform;
-               }
+         roadspeed.tags = function (tags) {
+           _tags = tags;
+           var value = tags[field.key];
+           var isMixed = Array.isArray(value);
+
+           if (!isMixed) {
+             if (value && value.indexOf('mph') >= 0) {
+               value = parseInt(value, 10).toString();
+               _isImperial = true;
+             } else if (value) {
+               _isImperial = false;
              }
            }
 
-           if (_transformStart.x === x && _transformStart.y === y && _transformStart.k === k) {
-             return; // no change
-           }
+           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);
+         };
 
-           var withinEditableZoom = map.withinEditableZoom();
+         roadspeed.focus = function () {
+           input.node().focus();
+         };
 
-           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);
-             }
+         roadspeed.entityIDs = function (val) {
+           _entityIDs = val;
+         };
 
-             _lastWithinEditableZoom = withinEditableZoom;
-           }
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }
 
-           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;
-           }
+         return utilRebind(roadspeed, dispatch, 'on');
+       }
 
-           projection.transform(eventTransform);
-           var scale = k / _transformStart.k;
-           var tX = (x / scale - _transformStart.x) * scale;
-           var tY = (y / scale - _transformStart.y) * scale;
+       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
 
-           if (context.inIntro()) {
-             curtainProjection.transform({
-               x: x - tX,
-               y: y - tY,
-               k: k
+         var typeField;
+         var layerField;
+         var _oldType = {};
+         var _entityIDs = [];
+
+         function selectedKey() {
+           var node = wrap.selectAll('.form-field-input-radio label.active input');
+           return !node.empty() && node.datum();
+         }
+
+         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 (source) {
-             _lastPointerEvent = 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
 
-           _isTransformed = true;
-           _transformLast = eventTransform;
-           utilSetTransform(supersurface, tX, tY, scale);
-           scheduleRedraw();
-           dispatch$1.call('move', this, map);
+           if (type) {
+             if (!typeField || typeField.id !== selected) {
+               typeField = uiField(context, type, _entityIDs, {
+                 wrap: false
+               }).on('change', changeType);
+             }
 
-           function isInteger(val) {
-             return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;
+             typeField.tags(tags);
+           } else {
+             typeField = null;
            }
-         }
 
-         function resetTransform() {
-           if (!_isTransformed) return false;
-           utilSetTransform(supersurface, 0, 0);
-           _isTransformed = false;
+           var typeItem = list.selectAll('.structure-type-item').data(typeField ? [typeField] : [], function (d) {
+             return d.id;
+           }); // Exit
 
-           if (context.inIntro()) {
-             curtainProjection.transform(projection.transform());
-           }
+           typeItem.exit().remove(); // Enter
 
-           return true;
-         }
+           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
 
-         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.
+           typeItem = typeItem.merge(typeEnter);
 
-           if (resetTransform()) {
-             difference = extent = undefined;
-           }
+           if (typeField) {
+             typeItem.selectAll('.structure-input-type-wrap').call(typeField.render);
+           } // Layer
 
-           var zoom = map.zoom();
-           var z = String(~~zoom);
 
-           if (surface.attr('data-zoom') !== z) {
-             surface.attr('data-zoom', z);
-           } // class surface as `lowzoom` around z17-z18.5 (based on latitude)
+           if (layer && showLayer) {
+             if (!layerField) {
+               layerField = uiField(context, layer, _entityIDs, {
+                 wrap: false
+               }).on('change', changeLayer);
+             }
+
+             layerField.tags(tags);
+             field.keys = utilArrayUnion(field.keys, ['layer']);
+           } else {
+             layerField = null;
+             field.keys = field.keys.filter(function (k) {
+               return k !== 'layer';
+             });
+           }
 
+           var layerItem = list.selectAll('.structure-layer-item').data(layerField ? [layerField] : []); // Exit
 
-           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));
+           layerItem.exit().remove(); // Enter
 
-           if (!difference) {
-             supersurface.call(context.background());
-             wrapper.call(drawLayers);
-           } // OSM
+           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
 
+           layerItem = layerItem.merge(layerEnter);
 
-           if (map.editableDataEnabled() || map.isInWideSelection()) {
-             context.loadTiles(projection);
-             drawEditable(difference, extent);
-           } else {
-             editOff();
+           if (layerField) {
+             layerItem.selectAll('.structure-input-layer-wrap').call(layerField.render);
            }
-
-           _transformStart = projection.transform();
-           return map;
          }
 
-         var immediateRedraw = function immediateRedraw(difference, extent) {
-           if (!difference && !extent) cancelPendingRedraw();
-           redraw(difference, extent);
-         };
+         function changeType(t, onInput) {
+           var key = selectedKey();
+           if (!key) return;
+           var val = t[key];
 
-         map.lastPointerEvent = function () {
-           return _lastPointerEvent;
-         };
+           if (val !== 'no') {
+             _oldType[key] = val;
+           }
 
-         map.mouse = function (d3_event) {
-           var event = _lastPointerEvent || d3_event;
+           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
 
-           if (event) {
-             var s;
 
-             while (s = event.sourceEvent) {
-               event = s;
+             if (t.layer === undefined) {
+               if (key === 'bridge' && val !== 'no') {
+                 t.layer = '1';
+               }
+
+               if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
+                 t.layer = '-1';
+               }
              }
+           }
 
-             return _getMouseCoords(event);
+           dispatch.call('change', this, t, onInput);
+         }
+
+         function changeLayer(t, onInput) {
+           if (t.layer === '0') {
+             t.layer = undefined;
            }
 
-           return null;
-         }; // returns Lng/Lat
+           dispatch.call('change', this, t, onInput);
+         }
 
+         function changeRadio() {
+           var t = {};
+           var activeKey;
 
-         map.mouseCoordinates = function () {
-           var coord = map.mouse() || pxCenter();
-           return projection.invert(coord);
-         };
+           if (field.key) {
+             t[field.key] = undefined;
+           }
 
-         map.dblclickZoomEnable = function (val) {
-           if (!arguments.length) return _dblClickZoomEnabled;
-           _dblClickZoomEnabled = val;
-           return map;
-         };
+           radios.each(function (d) {
+             var active = select(this).property('checked');
+             if (active) activeKey = d;
 
-         map.redrawEnable = function (val) {
-           if (!arguments.length) return _redrawEnabled;
-           _redrawEnabled = val;
-           return map;
-         };
+             if (field.key) {
+               if (active) t[field.key] = d;
+             } else {
+               var val = _oldType[activeKey] || 'yes';
+               t[d] = active ? val : undefined;
+             }
+           });
 
-         map.isTransformed = function () {
-           return _isTransformed;
-         };
+           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;
+             }
+           }
 
-         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;
+           dispatch.call('change', this, t);
+         }
 
-           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;
+         radio.tags = function (tags) {
+           function isOptionChecked(d) {
+             if (field.key) {
+               return tags[field.key] === d;
+             }
 
-             _selection.call(_zoomerPanner.transform, _transformStart);
+             return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
            }
 
-           return true;
-         }
+           function isMixed(d) {
+             if (field.key) {
+               return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
+             }
 
-         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
+             return Array.isArray(tags[d]);
+           }
 
-           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);
-         }
+           radios.property('checked', function (d) {
+             return isOptionChecked(d) && (field.key || field.options.filter(isOptionChecked).length === 1);
+           });
+           labels.classed('active', function (d) {
+             if (field.key) {
+               return Array.isArray(tags[field.key]) && tags[field.key].includes(d) || tags[field.key] === d;
+             }
 
-         map.pan = function (delta, duration) {
-           var t = projection.translate();
-           var k = projection.scale();
-           t[0] += delta[0];
-           t[1] += delta[1];
+             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 (duration) {
-             _selection.transition().duration(duration).on('start', function () {
-               map.startEase();
-             }).call(_zoomerPanner.transform, identity$2.translate(t[0], t[1]).scale(k));
+           if (selection.empty()) {
+             placeholder.call(_t.append('inspector.none'));
            } else {
-             projection.translate(t);
-             _transformStart = projection.transform();
+             placeholder.text(selection.attr('value'));
+             _oldType[selection.datum()] = tags[selection.datum()];
+           }
 
-             _selection.call(_zoomerPanner.transform, _transformStart);
+           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';
+             }
 
-             dispatch$1.call('move', this, map);
-             immediateRedraw();
+             wrap.call(structureExtras, tags);
            }
-
-           return map;
          };
 
-         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;
+         radio.focus = function () {
+           radios.node().focus();
          };
 
-         function zoomIn(delta) {
-           setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
-         }
-
-         function zoomOut(delta) {
-           setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
-         }
-
-         map.zoomIn = function () {
-           zoomIn(1);
+         radio.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           _oldType = {};
+           return radio;
          };
 
-         map.zoomInFurther = function () {
-           zoomIn(4);
+         radio.isAllowed = function () {
+           return _entityIDs.length === 1;
          };
 
-         map.canZoomIn = function () {
-           return map.zoom() < maxZoom;
-         };
+         return utilRebind(radio, dispatch, 'on');
+       }
 
-         map.zoomOut = function () {
-           zoomOut(1);
-         };
+       function uiFieldRestrictions(field, context) {
+         var dispatch = dispatch$8('change');
+         var breathe = behaviorBreathe();
+         corePreferences('turn-restriction-via-way', null); // remove old key
 
-         map.zoomOutFurther = function () {
-           zoomOut(4);
-         };
+         var storedViaWay = corePreferences('turn-restriction-via-way0'); // use new key #6922
 
-         map.canZoomOut = function () {
-           return map.zoom() > minZoom;
-         };
+         var storedDistance = corePreferences('turn-restriction-distance');
 
-         map.center = function (loc2) {
-           if (!arguments.length) {
-             return projection.invert(pxCenter());
-           }
+         var _maxViaWay = storedViaWay !== null ? +storedViaWay : 0;
 
-           if (setCenterZoom(loc2, map.zoom())) {
-             dispatch$1.call('move', this, map);
-           }
+         var _maxDistance = storedDistance ? +storedDistance : 30;
 
-           scheduleRedraw();
-           return map;
-         };
+         var _initialized = false;
 
-         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
+         var _parent = select(null); // the entire field
 
-           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);
-         };
 
-         map.unobscuredOffsetPx = function () {
-           var openPane = context.container().select('.map-panes .map-pane.shown');
+         var _container = select(null); // just the map
 
-           if (!openPane.empty()) {
-             return [openPane.node().offsetWidth / 2, 0];
-           }
 
-           return [0, 0];
-         };
+         var _oldTurns;
 
-         map.zoom = function (z2) {
-           if (!arguments.length) {
-             return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
-           }
+         var _graph;
 
-           if (z2 < _minzoom) {
-             surface.interrupt();
-             dispatch$1.call('hitMinZoom', this, map);
-             z2 = context.minEditableZoom();
-           }
+         var _vertexID;
 
-           if (setCenterZoom(map.center(), z2)) {
-             dispatch$1.call('move', this, map);
-           }
+         var _intersection;
 
-           scheduleRedraw();
-           return map;
-         };
+         var _fromWayID;
 
-         map.centerZoom = function (loc2, z2) {
-           if (setCenterZoom(loc2, z2)) {
-             dispatch$1.call('move', this, map);
-           }
+         var _lastXPos;
 
-           scheduleRedraw();
-           return map;
-         };
+         function restrictions(selection) {
+           _parent = selection; // try to reuse the intersection, but always rebuild it if the graph has changed
 
-         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);
-         };
+           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.
 
-         map.centerEase = function (loc2, duration) {
-           duration = duration || 250;
-           setCenterZoom(loc2, map.zoom(), duration);
-           return map;
-         };
 
-         map.zoomEase = function (z2, duration) {
-           duration = duration || 250;
-           setCenterZoom(map.center(), z2, duration, false);
-           return map;
-         };
+           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
 
-         map.centerZoomEase = function (loc2, z2, duration) {
-           duration = duration || 250;
-           setCenterZoom(loc2, z2, duration, false);
-           return map;
-         };
+           select(selection.node().parentNode).classed('hide', !isOK); // if form field is hidden or has detached from dom, clean up.
 
-         map.transformEase = function (t2, duration) {
-           duration = duration || 250;
-           setTransform(t2, duration, false
-           /* don't force */
-           );
-           return map;
-         };
+           if (!isOK || !context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode || !selection.node().parentNode.parentNode) {
+             selection.call(restrictions.off);
+             return;
+           }
 
-         map.zoomToEase = function (obj, duration) {
-           var extent;
+           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 (Array.isArray(obj)) {
-             obj.forEach(function (entity) {
-               var entityExtent = entity.extent(context.graph());
+           var containerEnter = container.enter().append('div').attr('class', 'restriction-container');
+           containerEnter.append('div').attr('class', 'restriction-help'); // update
 
-               if (!extent) {
-                 extent = entityExtent;
-               } else {
-                 extent = extent.extend(entityExtent);
-               }
-             });
-           } else {
-             extent = obj.extent(context.graph());
-           }
+           _container = containerEnter.merge(container).call(renderViewer);
+           var controls = wrap.selectAll('.restriction-controls').data([0]); // enter/update
 
-           if (!isFinite(extent.area())) return map;
-           var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
-           return map.centerZoomEase(extent.center(), z2, duration);
-         };
+           controls.enter().append('div').attr('class', 'restriction-controls-container').append('div').attr('class', 'restriction-controls').merge(controls).call(renderControls);
+         }
 
-         map.startEase = function () {
-           utilBindOnce(surface, _pointerPrefix + 'down.ease', function () {
-             map.cancelEase();
-           });
-           return map;
-         };
+         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
 
-         map.cancelEase = function () {
-           _selection.interrupt();
+           selection.selectAll('.restriction-distance-input').property('value', _maxDistance).on('input', function () {
+             var val = select(this).property('value');
+             _maxDistance = +val;
+             _intersection = null;
 
-           return map;
-         };
+             _container.selectAll('.layer-osm .layer-turns *').remove();
 
-         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));
-           }
-         };
+             corePreferences('turn-restriction-distance', _maxDistance);
 
-         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));
-           }
-         };
+             _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
 
-         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
+           selection.selectAll('.restriction-via-way-input').property('value', _maxViaWay).on('input', function () {
+             var val = select(this).property('value');
+             _maxViaWay = +val;
 
-           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;
-         }
+             _container.selectAll('.layer-osm .layer-turns *').remove();
 
-         map.extentZoom = function (val) {
-           return calcExtentZoom(geoExtent(val), _dimensions);
-         };
+             corePreferences('turn-restriction-via-way0', _maxViaWay);
 
-         map.trimmedExtentZoom = function (val) {
-           var trimY = 120;
-           var trimX = 40;
-           var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
-           return calcExtentZoom(geoExtent(val), trimmed);
-         };
+             _parent.call(restrictions);
+           });
+           selection.selectAll('.restriction-via-way-text').call(displayMaxVia(_maxViaWay));
+         }
 
-         map.withinEditableZoom = function () {
-           return map.zoom() >= context.minEditableZoom();
-         };
+         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);
 
-         map.isInWideSelection = function () {
-           return !map.withinEditableZoom() && context.selectedIDs().length;
-         };
+           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
 
-         map.editableDataEnabled = function (skipZoomCheck) {
-           var layer = context.layers().layer('osm');
-           if (!layer || !layer.enabled()) return false;
-           return skipZoomCheck || map.withinEditableZoom();
-         };
+           var extent = geoExtent();
 
-         map.notesEditable = function () {
-           var layer = context.layers().layer('notes');
-           if (!layer || !layer.enabled()) return false;
-           return map.withinEditableZoom();
-         };
+           for (var i = 0; i < _intersection.vertices.length; i++) {
+             extent._extend(_intersection.vertices[i].extent());
+           }
 
-         map.minzoom = function (val) {
-           if (!arguments.length) return _minzoom;
-           _minzoom = val;
-           return map;
-         };
+           var padTop = 35; // reserve top space for hint text
+           // If this is a large intersection, adjust zoom to fit extent
 
-         map.toggleHighlightEdited = function () {
-           surface.classed('highlight-edited', !surface.classed('highlight-edited'));
-           map.pan([0, 0]); // trigger a redraw
+           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));
+           }
 
-           dispatch$1.call('changeHighlighting', this);
-         };
+           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);
 
-         map.areaFillOptions = ['wireframe', 'partial', 'full'];
+           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.
 
-         map.activeAreaFill = function (val) {
-           if (!arguments.length) return corePreferences('area-fill') || 'partial';
-           corePreferences('area-fill', val);
 
-           if (val !== 'wireframe') {
-             corePreferences('area-fill-toggle', val);
+           if (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
+             _fromWayID = null;
+             _oldTurns = null;
            }
 
-           updateAreaFill();
-           map.pan([0, 0]); // trigger a redraw
+           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);
+           }
 
-           dispatch$1.call('changeAreaFill', this);
-           return map;
-         };
+           document.addEventListener('resizeWindow', function () {
+             utilSetDimensions(_container, null);
+             redraw(1);
+           }, false);
+           updateHints(null);
 
-         map.toggleWireframe = function () {
-           var activeFill = map.activeAreaFill();
+           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 (activeFill === 'wireframe') {
-             activeFill = corePreferences('area-fill-toggle') || 'partial';
-           } else {
-             activeFill = 'wireframe';
-           }
+             if (entity) {
+               datum = entity;
+             }
 
-           map.activeAreaFill(activeFill);
-         };
+             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 updateAreaFill() {
-           var activeFill = map.activeAreaFill();
-           map.areaFillOptions.forEach(function (opt) {
-             surface.classed('fill-' + opt, Boolean(opt === activeFill));
-           });
-         }
+               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
 
-         map.layers = function () {
-           return drawLayers;
-         };
+                 datumOnly.only = true; // but change this property
 
-         map.doubleUpHandler = function () {
-           return _doubleUpHandler;
-         };
+                 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.
 
-         return utilRebind(map, dispatch$1, 'on');
-       }
+                 turns = _intersection.turns(_fromWayID, 2);
+                 extraActions = [];
+                 _oldTurns = [];
 
-       function rendererPhotos(context) {
-         var dispatch$1 = dispatch('change');
-         var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'openstreetcam'];
-         var _allPhotoTypes = ['flat', 'panoramic'];
+                 for (i = 0; i < turns.length; i++) {
+                   var turn = turns[i];
+                   if (seen[turn.restrictionID]) continue; // avoid deleting the turn twice (#4968, #4928)
 
-         var _shownPhotoTypes = _allPhotoTypes.slice(); // shallow copy
+                   if (turn.direct && turn.path[1] === datum.path[1]) {
+                     seen[turns[i].restrictionID] = true;
+                     turn.restrictionType = osmInferRestriction(vgraph, turn, projection);
 
+                     _oldTurns.push(turn);
 
-         var _dateFilters = ['fromDate', 'toDate'];
+                     extraActions.push(actionUnrestrictTurn(turn));
+                   }
+                 }
 
-         var _fromDate;
+                 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 = [];
 
-         var _toDate;
+                 for (i = 0; i < turns.length; i++) {
+                   if (turns[i].key !== datum.key) {
+                     extraActions.push(actionRestrictTurn(turns[i], turns[i].restrictionType));
+                   }
+                 }
 
-         var _usernames;
+                 _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 photos() {}
+               context.perform.apply(context, actions); // At this point the datum will be changed, but will have same key..
+               // Refresh it and update the help..
 
-         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;
-           });
+               var s = surface.selectAll('.' + datum.key);
+               datum = s.empty() ? null : s.datum();
+               updateHints(datum);
+             } else {
+               _fromWayID = null;
+               _oldTurns = null;
+               redraw();
+             }
+           }
 
-           if (enabled.length) {
-             hash.photo_overlay = enabled.join(',');
-           } else {
-             delete hash.photo_overlay;
+           function mouseover(d3_event) {
+             var datum = d3_event.target.__data__;
+             updateHints(datum);
            }
 
-           window.location.replace('#' + utilQsString(hash, true));
-         }
+           _lastXPos = _lastXPos || sdims[0];
 
-         photos.overlayLayerIDs = function () {
-           return _layerIDs;
-         };
+           function redraw(minChange) {
+             var xPos = -1;
 
-         photos.allPhotoTypes = function () {
-           return _allPhotoTypes;
-         };
+             if (minChange) {
+               xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
+             }
 
-         photos.dateFilters = function () {
-           return _dateFilters;
-         };
+             if (!minChange || minChange && Math.abs(xPos - _lastXPos) >= minChange) {
+               if (context.hasEntity(_vertexID)) {
+                 _lastXPos = xPos;
 
-         photos.dateFilterValue = function (val) {
-           return val === _dateFilters[0] ? _fromDate : _toDate;
-         };
+                 _container.call(renderViewer);
+               }
+             }
+           }
 
-         photos.setDateFilter = function (type, val, updateUrl) {
-           // validate the date
-           var date = val && new Date(val);
+           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 (date && !isNaN(date)) {
-             val = date.toISOString().substr(0, 10);
-           } else {
-             val = null;
-           }
+             if (wayID) {
+               var turns = _intersection.turns(wayID, _maxViaWay);
 
-           if (type === _dateFilters[0]) {
-             _fromDate = val;
+               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 (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
-               _toDate = _fromDate;
+                 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 (type === _dateFilters[1]) {
-             _toDate = val;
+           function updateHints(datum) {
+             var help = _container.selectAll('.restriction-help').html('');
 
-             if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
-               _fromDate = _toDate;
+             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;
              }
-           }
 
-           dispatch$1.call('change', this);
+             if (_fromWayID) {
+               way = vgraph.entity(_fromWayID);
+               surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+             } // Hovering a way
 
-           if (updateUrl) {
-             var rangeString;
 
-             if (_fromDate || _toDate) {
-               rangeString = (_fromDate || '') + '_' + (_toDate || '');
-             }
+             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;
 
-             setUrlFilterValue('photo_dates', rangeString);
-           }
-         };
+               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: ''
+                 });
+               }
 
-         photos.setUsernameFilter = function (val, updateUrl) {
-           if (val && typeof val === 'string') val = val.replace(/;/g, ',').split(',');
+               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 (val) {
-             val = val.map(function (d) {
-               return d.trim();
-             }).filter(Boolean);
+               if (datum.via.ways && datum.via.ways.length) {
+                 var names = [];
 
-             if (!val.length) {
-               val = null;
-             }
-           }
+                 for (var i = 0; i < datum.via.ways.length; i++) {
+                   var prev = names[names.length - 1];
+                   var curr = displayName(datum.via.ways[i], vgraph);
 
-           _usernames = val;
-           dispatch$1.call('change', this);
+                   if (!prev || curr !== prev) {
+                     // collapse identical names
+                     names.push(curr);
+                   }
+                 }
 
-           if (updateUrl) {
-             var hashString;
+                 help.append('div') // "VIA {viaNames}"
+                 .html(_t.html('restriction.help.via_names', {
+                   via: placeholders.via,
+                   viaNames: names.join(', ')
+                 }));
+               }
 
-             if (_usernames) {
-               hashString = _usernames.join(',');
-             }
+               if (!indirect) {
+                 help.append('div') // Click for "No Right Turn"
+                 .html(_t.html('restriction.help.toggle', {
+                   turn: {
+                     html: nextText.trim()
+                   }
+                 }));
+               }
 
-             setUrlFilterValue('photo_username', hashString);
-           }
-         };
+               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 setUrlFilterValue(property, val) {
-           if (!window.mocha) {
-             var hash = utilStringQs(window.location.hash);
+               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 (val) {
-               if (hash[property] === val) return;
-               hash[property] = val;
+         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 {
-               if (!(property in hash)) return;
-               delete hash[property];
+               opts = {
+                 distance: _t('units.meters', {
+                   quantity: maxDist
+                 })
+               };
              }
 
-             window.location.replace('#' + utilQsString(hash, true));
-           }
+             return selection.html('').call(_t.append('restriction.controls.distance_up_to', opts));
+           };
          }
 
-         function showsLayer(id) {
-           var layer = context.layers().layer(id);
-           return layer && layer.supported() && layer.enabled();
+         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'));
+           };
          }
 
-         photos.shouldFilterByDate = function () {
-           return showsLayer('mapillary') || showsLayer('openstreetcam') || showsLayer('streetside');
-         };
+         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;
+         }
 
-         photos.shouldFilterByPhotoType = function () {
-           return showsLayer('mapillary') || showsLayer('streetside') && showsLayer('openstreetcam');
+         restrictions.entityIDs = function (val) {
+           _intersection = null;
+           _fromWayID = null;
+           _oldTurns = null;
+           _vertexID = val[0];
          };
 
-         photos.shouldFilterByUsername = function () {
-           return showsLayer('mapillary') || showsLayer('openstreetcam') || showsLayer('streetside');
-         };
+         restrictions.tags = function () {};
 
-         photos.showsPhotoType = function (val) {
-           if (!photos.shouldFilterByPhotoType()) return true;
-           return _shownPhotoTypes.indexOf(val) !== -1;
-         };
+         restrictions.focus = function () {};
 
-         photos.showsFlat = function () {
-           return photos.showsPhotoType('flat');
+         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);
          };
 
-         photos.showsPanoramic = function () {
-           return photos.showsPhotoType('panoramic');
-         };
+         return utilRebind(restrictions, dispatch, 'on');
+       }
+       uiFieldRestrictions.supportsMultiselection = false;
 
-         photos.fromDate = function () {
-           return _fromDate;
-         };
+       function uiFieldTextarea(field, context) {
+         var dispatch = dispatch$8('change');
+         var input = select(null);
 
-         photos.toDate = function () {
-           return _toDate;
-         };
+         var _tags;
 
-         photos.togglePhotoType = function (val) {
-           var index = _shownPhotoTypes.indexOf(val);
+         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);
+         }
 
-           if (index !== -1) {
-             _shownPhotoTypes.splice(index, 1);
-           } else {
-             _shownPhotoTypes.push(val);
-           }
+         function change(onInput) {
+           return function () {
+             var val = utilGetSetValue(input);
+             if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
 
-           dispatch$1.call('change', this);
-           return photos;
+             if (!val && Array.isArray(_tags[field.key])) return;
+             var t = {};
+             t[field.key] = val || undefined;
+             dispatch.call('change', this, t, onInput);
+           };
+         }
+
+         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);
          };
 
-         photos.usernames = function () {
-           return _usernames;
+         textarea.focus = function () {
+           input.node().focus();
          };
 
-         photos.init = function () {
-           var hash = utilStringQs(window.location.hash);
+         return utilRebind(textarea, dispatch, 'on');
+       }
 
-           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 uiFieldWikidata(field, context) {
+         var wikidata = services.wikidata;
+         var dispatch = dispatch$8('change');
 
-           if (hash.photo_username) {
-             this.setUsernameFilter(hash.photo_username, false);
-           }
+         var _selection = select(null);
 
-           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 _searchInput = select(null);
 
-           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);
+         var _qid = null;
+         var _wikidataEntity = null;
+         var _wikiURL = '';
+         var _entityIDs = [];
 
-             if (results && results.length >= 3) {
-               var serviceId = results[1];
-               var photoKey = results[2];
-               var service = services[serviceId];
+         var _wikipediaKey = field.keys && field.keys.find(function (key) {
+           return key.includes('wikipedia');
+         }),
+             _hintKey = field.key === 'wikidata' ? 'name' : field.key.split(':')[0];
 
-               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;
-                   }
+         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
+
+           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 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 (!service.cachedImage(photoKey)) return;
-                   service.on('loadedImages.rendererPhotos', null);
-                   service.ensureViewerLoaded(context).then(function () {
-                     service.selectImage(context, photoKey).showViewer(context);
-                   });
-                 });
+               if (entity.tags[_hintKey]) {
+                 q = entity.tags[_hintKey];
+                 break;
                }
              }
            }
 
-           context.layers().on('change.rendererPhotos', updateStorage);
-         };
-
-         return utilRebind(photos, dispatch$1, 'on');
-       }
-
-       function uiAccount(context) {
-         var osm = context.connection();
+           wikidata.itemsForSearchQuery(q, function (err, data) {
+             if (err) return;
 
-         function update(selection) {
-           if (!osm) return;
+             for (var i in data) {
+               data[i].value = data[i].label + ' (' + data[i].id + ')';
+               data[i].title = data[i].description;
+             }
 
-           if (!osm.authenticated()) {
-             selection.selectAll('.userLink, .logoutLink').classed('hide', true);
-             return;
-           }
+             if (callback) callback(data);
+           });
+         }
 
-           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
+         function change() {
+           var syncTags = {};
+           syncTags[field.key] = _qid;
+           dispatch.call('change', this, syncTags); // attempt asynchronous update of wikidata tag..
 
-             var userLinkA = userLink.append('a').attr('href', osm.userURL(details.display_name)).attr('target', '_blank'); // Add thumbnail or dont
+           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.
 
-             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
+             if (context.graph() !== initGraph) return;
+             if (!entity.sitelinks) return;
+             var langs = wikidata.languagesToQuery(); // use the label and description languages as fallbacks
 
+             ['labels', 'descriptions'].forEach(function (key) {
+               if (!entity[key]) return;
+               var valueLangs = Object.keys(entity[key]);
+               if (valueLangs.length === 0) return;
+               var valueLang = valueLangs[0];
 
-             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();
+               if (langs.indexOf(valueLang) === -1) {
+                 langs.push(valueLang);
+               }
              });
-           });
-         }
+             var newWikipediaValue;
 
-         return function (selection) {
-           selection.append('li').attr('class', 'userLink').classed('hide', true);
-           selection.append('li').attr('class', 'logoutLink').classed('hide', true);
+             if (_wikipediaKey) {
+               var foundPreferred;
 
-           if (osm) {
-             osm.on('change.account', function () {
-               update(selection);
-             });
-             update(selection);
-           }
-         };
-       }
+               for (var i in langs) {
+                 var lang = langs[i];
+                 var siteID = lang.replace('-', '_') + 'wiki';
 
-       function uiAttribution(context) {
-         var _selection = select(null);
+                 if (entity.sitelinks[siteID]) {
+                   foundPreferred = true;
+                   newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title; // use the first match
 
-         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]);
+                   break;
+                 }
+               }
 
-             if (d.terms_html) {
-               attribution.html(d.terms_html);
-               return;
-             }
+               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');
+                 });
 
-             if (d.terms_url) {
-               attribution = attribution.append('a').attr('href', d.terms_url).attr('target', '_blank');
+                 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;
+                 }
+               }
              }
 
-             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()
-             });
-
-             if (d.icon && !d.overlay) {
-               attribution.append('img').attr('class', 'source-image').attr('src', d.icon);
+             if (newWikipediaValue) {
+               newWikipediaValue = context.cleanTagValue(newWikipediaValue);
              }
 
-             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] : [];
-           });
-           copyright.exit().remove();
-           copyright = copyright.enter().append('span').attr('class', 'copyright-notice').merge(copyright);
-           copyright.html(String);
-         }
-
-         function update() {
-           var baselayer = context.background().baseLayerSource();
+             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
 
-           _selection.call(render, baselayer ? [baselayer] : [], 'base-layer-attribution');
+               if (newWikipediaValue === null) {
+                 if (!currTags[_wikipediaKey]) return null;
+                 delete currTags[_wikipediaKey];
+               } else {
+                 currTags[_wikipediaKey] = newWikipediaValue;
+               }
 
-           var z = context.map().zoom();
-           var overlays = context.background().overlayLayerSources() || [];
+               return actionChangeTags(entityID, currTags);
+             }).filter(Boolean);
+             if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
 
-           _selection.call(render, overlays.filter(function (s) {
-             return s.validZoom(z);
-           }), 'overlay-layer-attribution');
+             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
+           });
          }
 
-         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);
+         function setLabelForEntity() {
+           var label = '';
 
-         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 (_wikidataEntity) {
+             label = entityPropertyForDisplay(_wikidataEntity, 'labels');
 
-           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()
-             }));
-           } else {
-             wrap.append('span').html(_t.html('contributors.list', {
-               users: userList.html()
-             }));
+             if (label.length === 0) {
+               label = _wikidataEntity.id.toString();
+             }
            }
 
-           if (!u.length) {
-             hidden = true;
-             wrap.transition().style('opacity', 0);
-           } else if (hidden) {
-             wrap.transition().style('opacity', 1);
-           }
+           utilGetSetValue(_searchInput, label);
          }
 
-         return function (selection) {
-           if (!osm) return;
-           wrap = selection;
-           update();
-           osm.on('loaded.contributors', debouncedUpdate);
-           context.map().on('move.contributors', debouncedUpdate);
-         };
-       }
-
-       var _popoverID = 0;
-       function uiPopover(klass) {
-         var _id = _popoverID++;
-
-         var _anchorSelection = select(null);
-
-         var popover = function popover(selection) {
-           _anchorSelection = selection;
-           selection.each(setup);
-         };
-
-         var _animation = utilFunctor(false);
-
-         var _placement = utilFunctor('top'); // top, bottom, left, right
-
+         wiki.tags = function (tags) {
+           var isMixed = Array.isArray(tags[field.key]);
 
-         var _alignment = utilFunctor('center'); // leading, center, trailing
+           _searchInput.attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : '').classed('mixed', isMixed);
 
+           _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';
 
-         var _scrollContainer = utilFunctor(select(null));
+           if (!/^Q[0-9]*$/.test(_qid)) {
+             // not a proper QID
+             unrecognized();
+             return;
+           } // QID value in correct format
 
-         var _content;
 
-         var _displayType = utilFunctor('');
+           _wikiURL = 'https://wikidata.org/wiki/' + _qid;
+           wikidata.entityByQID(_qid, function (err, entity) {
+             if (err) {
+               unrecognized();
+               return;
+             }
 
-         var _hasArrow = utilFunctor(true); // use pointer events on supported platforms; fallback to mouse events
+             _wikidataEntity = entity;
+             setLabelForEntity();
+             var description = entityPropertyForDisplay(entity, 'descriptions');
 
+             _selection.select('button.wiki-link').classed('disabled', false);
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+             _selection.select('.preset-wikidata-description').style('display', function () {
+               return description.length > 0 ? 'flex' : 'none';
+             }).select('input').attr('value', description);
 
-         popover.displayType = function (val) {
-           if (arguments.length) {
-             _displayType = utilFunctor(val);
-             return popover;
-           } else {
-             return _displayType;
-           }
-         };
+             _selection.select('.preset-wikidata-identifier').style('display', function () {
+               return entity.id ? 'flex' : 'none';
+             }).select('input').attr('value', entity.id);
+           }); // not a proper QID
 
-         popover.hasArrow = function (val) {
-           if (arguments.length) {
-             _hasArrow = utilFunctor(val);
-             return popover;
-           } else {
-             return _hasArrow;
-           }
-         };
+           function unrecognized() {
+             _wikidataEntity = null;
+             setLabelForEntity();
 
-         popover.placement = function (val) {
-           if (arguments.length) {
-             _placement = utilFunctor(val);
-             return popover;
-           } else {
-             return _placement;
-           }
-         };
+             _selection.select('.preset-wikidata-description').style('display', 'none');
 
-         popover.alignment = function (val) {
-           if (arguments.length) {
-             _alignment = utilFunctor(val);
-             return popover;
-           } else {
-             return _alignment;
-           }
-         };
+             _selection.select('.preset-wikidata-identifier').style('display', 'none');
 
-         popover.scrollContainer = function (val) {
-           if (arguments.length) {
-             _scrollContainer = utilFunctor(val);
-             return popover;
-           } else {
-             return _scrollContainer;
-           }
-         };
+             _selection.select('button.wiki-link').classed('disabled', true);
 
-         popover.content = function (val) {
-           if (arguments.length) {
-             _content = val;
-             return popover;
-           } else {
-             return _content;
+             if (_qid && _qid !== '') {
+               _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
+             } else {
+               _wikiURL = '';
+             }
            }
          };
 
-         popover.isShown = function () {
-           var popoverSelection = _anchorSelection.select('.popover-' + _id);
-
-           return !popoverSelection.empty() && popoverSelection.classed('in');
-         };
+         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
 
-         popover.show = function () {
-           _anchorSelection.each(show);
-         };
+           var langs = wikidata.languagesToQuery();
 
-         popover.updateContent = function () {
-           _anchorSelection.each(updateContent);
-         };
+           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
 
-         popover.hide = function () {
-           _anchorSelection.each(hide);
-         };
 
-         popover.toggle = function () {
-           _anchorSelection.each(toggle);
-         };
+           return propObj[langKeys[0]].value;
+         }
 
-         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();
+         wiki.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return wiki;
          };
 
-         popover.destroyAny = function (selection) {
-           selection.call(popover.destroy, '.popover');
+         wiki.focus = function () {
+           _searchInput.node().focus();
          };
 
-         function setup() {
-           var anchor = select(this);
-
-           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);
+         return utilRebind(wiki, dispatch, 'on');
+       }
 
-           if (animate) {
-             popoverSelection.classed('fade', true);
-           }
+       function uiFieldWikipedia(field, context) {
+         var _arguments = arguments;
+         var dispatch = dispatch$8('change');
+         var wikipedia = services.wikipedia;
+         var wikidata = services.wikidata;
 
-           var display = _displayType.apply(this, arguments);
+         var _langInput = select(null);
 
-           if (display === 'hover') {
-             var _lastNonMouseEnterTime;
+         var _titleInput = select(null);
 
-             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 _wikiURL = '';
 
-                   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 _entityIDs;
 
+         var _tags;
 
-               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 _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 = '';
 
-         function show() {
-           var anchor = select(this);
-           var popoverSelection = anchor.selectAll('.popover-' + _id);
+             for (var i in _entityIDs) {
+               var entity = context.hasEntity(_entityIDs[i]);
 
-           if (popoverSelection.empty()) {
-             // popover was removed somehow, put it back
-             anchor.call(popover.destroy);
-             anchor.each(setup);
-             popoverSelection = anchor.selectAll('.popover-' + _id);
+               if (entity.tags.name) {
+                 value = entity.tags.name;
+                 break;
+               }
+             }
            }
 
-           popoverSelection.classed('in', true);
-
-           var displayType = _displayType.apply(this, arguments);
-
-           if (displayType === 'clickFocus') {
-             anchor.classed('active', true);
-             popoverSelection.node().focus();
-           }
+           var searchfn = value.length > 7 ? wikipedia.search : wikipedia.suggestions;
+           searchfn(language()[2], value, function (query, data) {
+             callback(data.map(function (d) {
+               return {
+                 value: d
+               };
+             }));
+           });
+         });
 
-           anchor.each(updateContent);
-         }
+         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);
 
-         function updateContent() {
-           var anchor = select(this);
+           _langInput.on('blur', changeLang).on('change', changeLang);
 
-           if (_content) {
-             anchor.selectAll('.popover-' + _id + ' > .popover-inner').call(_content.apply(this, arguments));
-           }
+           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);
 
-           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
+           _titleInput.on('blur', function () {
+             change(true);
+           }).on('change', function () {
+             change(false);
+           });
 
-           updatePosition.apply(this, arguments);
-           updatePosition.apply(this, arguments);
+           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');
+           });
          }
 
-         function updatePosition() {
-           var anchor = select(this);
-           var popoverSelection = anchor.selectAll('.popover-' + _id);
-
-           var scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);
+         function defaultLanguageInfo(skipEnglishFallback) {
+           var langCode = _mainLocalizer.languageCode().toLowerCase();
 
-           var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
-           var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
-           var scrollTop = scrollNode ? scrollNode.scrollTop : 0;
+           for (var i in _dataWikipedia) {
+             var d = _dataWikipedia[i]; // default to the language of iD's current locale
 
-           var placement = _placement.apply(this, arguments);
+             if (d[2] === langCode) return d;
+           } // fallback to English
 
-           popoverSelection.classed('left', false).classed('right', false).classed('top', false).classed('bottom', false).classed(placement, true);
 
-           var alignment = _alignment.apply(this, arguments);
+           return skipEnglishFallback ? ['', '', ''] : ['English', 'English', 'en'];
+         }
 
-           var alignFactor = 0.5;
+         function language(skipEnglishFallback) {
+           var value = utilGetSetValue(_langInput).toLowerCase();
 
-           if (alignment === 'leading') {
-             alignFactor = 0;
-           } else if (alignment === 'trailing') {
-             alignFactor = 1;
-           }
+           for (var i in _dataWikipedia) {
+             var d = _dataWikipedia[i]; // return the language already set in the UI, if supported
 
-           var anchorFrame = getFrame(anchor.node());
-           var popoverFrame = getFrame(popoverSelection.node());
-           var position;
+             if (d[0].toLowerCase() === value || d[1].toLowerCase() === value || d[2] === value) return d;
+           } // fallback to English
 
-           switch (placement) {
-             case 'top':
-               position = {
-                 x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
-                 y: anchorFrame.y - popoverFrame.h
-               };
-               break;
 
-             case 'bottom':
-               position = {
-                 x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
-                 y: anchorFrame.y + anchorFrame.h
-               };
-               break;
+           return defaultLanguageInfo(skipEnglishFallback);
+         }
 
-             case 'left':
-               position = {
-                 x: anchorFrame.x - popoverFrame.w,
-                 y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
-               };
-               break;
+         function changeLang() {
+           utilGetSetValue(_langInput, language()[1]);
+           change(true);
+         }
 
-             case 'right':
-               position = {
-                 x: anchorFrame.x + anchorFrame.w,
-                 y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
-               };
-               break;
-           }
+         function change(skipWikidata) {
+           var value = utilGetSetValue(_titleInput);
+           var m = value.match(/https?:\/\/([-a-z]+)\.wikipedia\.org\/(?:wiki|\1-[-a-z]+)\/([^#]+)(?:#(.+))?/);
 
-           if (position) {
-             if (scrollNode && (placement === 'top' || placement === 'bottom')) {
-               var initialPosX = position.x;
+           var langInfo = m && _dataWikipedia.find(function (d) {
+             return m[1] === d[2];
+           });
 
-               if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
-                 position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
-               } else if (position.x < 10) {
-                 position.x = 10;
-               }
+           var syncTags = {};
 
-               var arrow = anchor.selectAll('.popover-' + _id + ' > .popover-arrow'); // keep the arrow centered on the button, or as close as possible
+           if (langInfo) {
+             var nativeLangName = langInfo[1]; // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization
 
-               var arrowPosX = Math.min(Math.max(popoverFrame.w / 2 - (position.x - initialPosX), 10), popoverFrame.w - 10);
-               arrow.style('left', ~~arrowPosX + 'px');
-             }
+             value = decodeURIComponent(m[2]).replace(/_/g, ' ');
 
-             popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
-           } else {
-             popoverSelection.style('left', null).style('top', null);
-           }
+             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) {
 
-           function getFrame(node) {
-             var positionStyle = select(node).style('position');
+               anchor = decodeURIComponent(m[3]); // }
 
-             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
-               };
+               value += '#' + anchor.replace(/_/g, ' ');
              }
-           }
-         }
-
-         function hide() {
-           var anchor = select(this);
 
-           if (_displayType.apply(this, arguments) === 'clickFocus') {
-             anchor.classed('active', false);
+             value = value.slice(0, 1).toUpperCase() + value.slice(1);
+             utilGetSetValue(_langInput, nativeLangName);
+             utilGetSetValue(_titleInput, value);
            }
 
-           anchor.selectAll('.popover-' + _id).classed('in', false);
-         }
-
-         function toggle() {
-           if (select(this).select('.popover-' + _id).classed('in')) {
-             hide.apply(this, arguments);
+           if (value) {
+             syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
            } else {
-             show.apply(this, arguments);
+             syncTags.wikipedia = undefined;
            }
-         }
-
-         return popover;
-       }
 
-       function uiTooltip(klass) {
-         var tooltip = uiPopover((klass || '') + ' tooltip').displayType('hover');
+           dispatch.call('change', this, syncTags);
+           if (skipWikidata || !value || !language()[2]) return; // attempt asynchronous update of wikidata tag..
 
-         var _title = function _title() {
-           var title = this.getAttribute('data-original-title');
+           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 (title) {
-             return title;
-           } else {
-             title = this.getAttribute('title');
-             this.removeAttribute('title');
-             this.setAttribute('data-original-title', title);
-           }
+             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
 
-           return title;
-         };
+               if (currTags.wikidata !== value) {
+                 currTags.wikidata = value;
+                 return actionChangeTags(entityID, currTags);
+               }
 
-         var _heading = utilFunctor(null);
+               return null;
+             }).filter(Boolean);
+             if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
 
-         var _keys = utilFunctor(null);
+             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
+           });
+         }
 
-         tooltip.title = function (val) {
-           if (!arguments.length) return _title;
-           _title = utilFunctor(val);
-           return tooltip;
+         wiki.tags = function (tags) {
+           _tags = tags;
+           updateForTags(tags);
          };
 
-         tooltip.heading = function (val) {
-           if (!arguments.length) return _heading;
-           _heading = utilFunctor(val);
-           return tooltip;
-         };
+         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`
 
-         tooltip.keys = function (val) {
-           if (!arguments.length) return _keys;
-           _keys = utilFunctor(val);
-           return tooltip;
-         };
+           var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
+           var tagLang = m && m[1];
+           var tagArticleTitle = m && m[2];
+           var anchor = m && m[3];
 
-         tooltip.content(function () {
-           var heading = _heading.apply(this, arguments);
+           var tagLangInfo = tagLang && _dataWikipedia.find(function (d) {
+             return tagLang === d[2];
+           }); // value in correct format
 
-           var text = _title.apply(this, arguments);
 
-           var keys = _keys.apply(this, arguments);
+           if (tagLangInfo) {
+             var nativeLangName = tagLangInfo[1];
+             utilGetSetValue(_langInput, nativeLangName);
+             utilGetSetValue(_titleInput, tagArticleTitle + (anchor ? '#' + anchor : ''));
 
-           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;
-             });
-           };
-         });
-         return tooltip;
-       }
+             if (anchor) {
+               try {
+                 // Best-effort `anchorencode:` implementation
+                 anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
+               } catch (e) {
+                 anchor = anchor.replace(/ /g, '_');
+               }
+             }
 
-       function uiEditMenu(context) {
-         var dispatch$1 = dispatch('toggled');
+             _wikiURL = 'https://' + tagLang + '.wikipedia.org/wiki/' + tagArticleTitle.replace(/ /g, '_') + (anchor ? '#' + anchor : ''); // unrecognized value format
+           } else {
+             utilGetSetValue(_titleInput, value);
 
-         var _menu = select(null);
+             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 = '';
+             }
+           }
+         }
 
-         var _operations = []; // the position the menu should be displayed relative to
+         wiki.entityIDs = function (val) {
+           if (!_arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return wiki;
+         };
 
-         var _anchorLoc = [0, 0];
-         var _anchorLocLonLat = [0, 0]; // a string indicating how the menu was opened
+         wiki.focus = function () {
+           _titleInput.node().focus();
+         };
 
-         var _triggerType = '';
-         var _vpTopMargin = 85; // viewport top margin
+         return utilRebind(wiki, dispatch, 'on');
+       }
+       uiFieldWikipedia.supportsMultiselection = false;
 
-         var _vpBottomMargin = 45; // viewport bottom margin
+       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 _vpSideMargin = 35; // viewport side margin
+       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 _menuTop = false;
+         field.domId = utilUniqueDomId('form-field-' + field.safeid);
+         var _show = options.show;
+         var _state = '';
+         var _tags = {};
 
-         var _menuHeight;
+         var _entityExtent;
 
-         var _menuWidth; // hardcode these values to make menu positioning easier
+         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 _verticalPadding = 4; // see also `.edit-menu .tooltip` CSS; include margin
+         var _lockedTip = uiTooltip().title(_t.html('inspector.lock.suggestion', {
+           label: field.label
+         })).placement('bottom');
 
-         var _tooltipWidth = 210; // offset the menu slightly from the target location
+         field.keys = field.keys || [field.key]; // only create the fields that are actually being shown
 
-         var _menuSideMargin = 10;
-         var _tooltips = [];
+         if (_show && !field.impl) {
+           createField();
+         } // Creates the field.. This is done lazily,
+         // once we know that the field will be shown.
 
-         var editMenu = function editMenu(selection) {
-           var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');
 
-           var ops = _operations.filter(function (op) {
-             return !isTouchMenu || !op.mouseOnly;
+         function createField() {
+           field.impl = uiFields[field.type](field, context).on('change', function (t, onInput) {
+             dispatch.call('change', field, t, onInput);
            });
 
-           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
-
-           _menuTop = isTouchMenu; // Show labels for touch input since there aren't hover tooltips
-
-           var showLabels = isTouchMenu;
-           var buttonHeight = showLabels ? 32 : 34;
+           if (entityIDs) {
+             field.entityIDs = entityIDs; // if this field cares about the entities, pass them along
 
-           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 (field.impl.entityIDs) {
+               field.impl.entityIDs(entityIDs);
+             }
            }
+         }
 
-           _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
-           _menu = selection.append('div').attr('class', 'edit-menu').classed('touch-menu', isTouchMenu).style('padding', _verticalPadding + 'px 0');
+         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];
+             });
+           });
+         }
 
-           var buttons = _menu.selectAll('.edit-menu-item').data(ops); // enter
+         function tagsContainFieldKey() {
+           return field.keys.some(function (key) {
+             if (field.type === 'multiCombo') {
+               for (var tagKey in _tags) {
+                 if (tagKey.indexOf(key) === 0) {
+                   return true;
+                 }
+               }
 
+               return false;
+             }
 
-           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);
+             return _tags[key] !== undefined;
            });
-           buttonsEnter.each(function (d) {
-             var tooltip = uiTooltip().heading(d.title).title(d.tooltip()).keys([d.keys[0]]);
+         }
 
-             _tooltips.push(tooltip);
+         function revert(d3_event, d) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+           if (!entityIDs || _locked) return;
+           dispatch.call('revert', d, d.keys);
+         }
 
-             select(this).call(tooltip).append('div').attr('class', 'icon-wrap').call(svgIcon('#iD-operation-' + d.id, 'operation'));
+         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);
+         }
 
-           if (showLabels) {
-             buttonsEnter.append('span').attr('class', 'label').html(function (d) {
-               return d.title;
-             });
-           } // update
-
+         field.render = function (selection) {
+           var container = selection.selectAll('.form-field').data([field]); // Enter
 
-           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`
+           var enter = container.enter().append('div').attr('class', function (d) {
+             return 'form-field form-field-' + d.safeid;
+           }).classed('nowrap', !options.wrap);
 
-           function pointerup(d3_event) {
-             lastPointerUpType = d3_event.pointerType;
-           }
+           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');
 
-           function click(d3_event, operation) {
-             d3_event.stopPropagation();
+             if (options.remove) {
+               labelEnter.append('button').attr('class', 'remove-icon').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete'));
+             }
 
-             if (operation.relatedEntityIds) {
-               utilHighlightEntities(operation.relatedEntityIds(), false, context);
+             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
 
-             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();
+           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);
+
+             if (!d.impl) {
+               createField();
              }
 
-             lastPointerUpType = null;
-           }
+             var reference, help; // instantiate field help
 
-           dispatch$1.call('toggled', this, true);
-         };
+             if (options.wrap && field.type === 'restrictions') {
+               help = uiFieldHelp(context, 'restrictions');
+             } // instantiate tag reference
 
-         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 (options.wrap && options.info) {
+               var referenceKey = d.key || '';
 
-           var menuLeft = displayOnLeft(viewport);
-           var offset = [0, 0];
-           offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;
+               if (d.type === 'multiCombo') {
+                 // lookup key without the trailing ':'
+                 referenceKey = referenceKey.replace(/:$/, '');
+               }
 
-           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 {
-             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;
+               reference = uiTagReference(d.reference || {
+                 key: referenceKey
+               });
+
+               if (_state === 'hover') {
+                 reference.showing(false);
+               }
              }
-           }
 
-           var origin = geoVecAdd(anchorLoc, offset);
+             selection.call(d.impl); // add field help components
 
-           _menu.style('left', origin[0] + 'px').style('top', origin[1] + 'px');
+             if (help) {
+               selection.call(help.body).select('.field-label').call(help.button);
+             } // add tag reference components
 
-           var tooltipSide = tooltipPosition(viewport, menuLeft);
 
-           _tooltips.forEach(function (tooltip) {
-             tooltip.placement(tooltipSide);
+             if (reference) {
+               selection.call(reference.body).select('.field-label').call(reference.button);
+             }
+
+             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
 
-           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
+           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);
+         };
 
+         field.state = function (val) {
+           if (!arguments.length) return _state;
+           _state = val;
+           return field;
+         };
 
-               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
+         field.tags = function (val) {
+           if (!arguments.length) return _tags;
+           _tags = val;
 
+           if (tagsContainFieldKey() && !_show) {
+             // always show a field if it has a value to display
+             _show = true;
 
-               return true;
+             if (!field.impl) {
+               createField();
              }
            }
 
-           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 field;
+         };
 
-               return 'right';
-             } else {
-               // rtl
-               if (!menuLeft) {
-                 return 'right';
-               }
+         field.locked = function (val) {
+           if (!arguments.length) return _locked;
+           _locked = val;
+           return field;
+         };
 
-               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
+         field.show = function () {
+           _show = true;
 
+           if (!field.impl) {
+             createField();
+           }
 
-               return 'left';
-             }
+           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
 
-         editMenu.close = function () {
-           context.map().on('move.edit-menu', null).on('drawn.edit-menu', null);
 
-           _menu.remove();
+         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
 
-           _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;
-         };
+         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;
 
-         editMenu.triggerType = function (val) {
-           if (!arguments.length) return _triggerType;
-           _triggerType = val;
-           return editMenu;
-         };
+           if (entityIDs && _entityExtent && field.locationSetID) {
+             // is field allowed in this location?
+             var validLocations = _mainLocations.locationsAt(_entityExtent.center());
+             if (!validLocations[field.locationSetID]) return false;
+           }
 
-         editMenu.operations = function (val) {
-           if (!arguments.length) return _operations;
-           _operations = val;
-           return editMenu;
-         };
+           var prerequisiteTag = field.prerequisiteTag;
 
-         return utilRebind(editMenu, dispatch$1, 'on');
-       }
+           if (entityIDs && !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
+           prerequisiteTag) {
+             if (!entityIDs.every(function (entityID) {
+               var entity = context.graph().entity(entityID);
 
-       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 (prerequisiteTag.key) {
+                 var value = entity.tags[prerequisiteTag.key];
+                 if (!value) return false;
 
-             return null;
-           }).filter(Boolean);
-           selection.html('');
+                 if (prerequisiteTag.valueNot) {
+                   return prerequisiteTag.valueNot !== value;
+                 }
 
-           if (hiddenList.length) {
-             var tooltipBehavior = uiTooltip().placement('top').title(function () {
-               return hiddenList.join('<br/>');
-             });
-             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
+                 if (prerequisiteTag.value) {
+                   return prerequisiteTag.value === value;
+                 }
+               } else if (prerequisiteTag.keyNot) {
+                 if (entity.tags[prerequisiteTag.keyNot]) return false;
+               }
 
-               context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
-             });
+               return true;
+             })) return false;
            }
 
-           selection.classed('hide', !hiddenList.length);
-         }
+           return true;
+         };
 
-         return function (selection) {
-           update(selection);
-           context.features().on('change.feature_info', function () {
-             update(selection);
-           });
+         field.focus = function () {
+           if (field.impl) {
+             field.impl.focus();
+           }
          };
+
+         return utilRebind(field, dispatch, 'on');
        }
 
-       function uiFlash(context) {
-         var _flashTimer;
+       function uiFormFields(context) {
+         var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
+         var _fieldsArr = [];
+         var _lastPlaceholder = '';
+         var _state = '';
+         var _klass = '';
 
-         var _duration = 2000;
-         var _iconName = '#iD-icon-no';
-         var _iconClass = 'disabled';
-         var _label = '';
+         function formFields(selection) {
+           var allowedFields = _fieldsArr.filter(function (field) {
+             return field.isAllowed();
+           });
 
-         function flash() {
-           if (_flashTimer) {
-             _flashTimer.stop();
-           }
+           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
 
-           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 enter = fields.enter().append('div').attr('class', function (d) {
+             return 'wrap-form-field wrap-form-field-' + d.safeid;
+           }); // Update
 
-           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
+           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
 
-           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 field = d.field;
+             field.show();
+             selection.call(formFields); // rerender
 
-         flash.duration = function (_) {
-           if (!arguments.length) return _duration;
-           _duration = _;
-           return flash;
-         };
+             field.focus();
+           })); // avoid updating placeholder excessively (triggers style recalc)
 
-         flash.label = function (_) {
-           if (!arguments.length) return _label;
-           _label = _;
-           return flash;
+           if (_lastPlaceholder !== placeholder) {
+             input.attr('placeholder', placeholder);
+             _lastPlaceholder = placeholder;
+           }
+         }
+
+         formFields.fieldsArr = function (val) {
+           if (!arguments.length) return _fieldsArr;
+           _fieldsArr = val || [];
+           return formFields;
          };
 
-         flash.iconName = function (_) {
-           if (!arguments.length) return _iconName;
-           _iconName = _;
-           return flash;
+         formFields.state = function (val) {
+           if (!arguments.length) return _state;
+           _state = val;
+           return formFields;
          };
 
-         flash.iconClass = function (_) {
-           if (!arguments.length) return _iconClass;
-           _iconClass = _;
-           return flash;
+         formFields.klass = function (val) {
+           if (!arguments.length) return _klass;
+           _klass = val;
+           return formFields;
          };
 
-         return flash;
+         return formFields;
        }
 
-       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;
-           }
-         }
-
-         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;
-           }
-         }
+       function uiChangesetEditor(context) {
+         var dispatch = dispatch$8('change');
+         var formFields = uiFormFields(context);
+         var commentCombo = uiCombobox(context, 'comment').caseSensitive(true);
 
-         function isFullScreen() {
-           return document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement;
-         }
+         var _fieldsArr;
 
-         function isSupported() {
-           return !!getFullScreenFn();
-         }
+         var _tags;
 
-         function fullScreen(d3_event) {
-           d3_event.preventDefault();
+         var _changesetID;
 
-           if (!isFullScreen()) {
-             // button.classed('active', true);
-             getFullScreenFn().apply(element);
-           } else {
-             // button.classed('active', false);
-             getExitFullScreenFn().apply(document);
-           }
+         function changesetEditor(selection) {
+           render(selection);
          }
 
-         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');
+         function render(selection) {
+           var initial = false;
 
-           var detected = utilDetect();
-           var keys = detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11'];
-           context.keybinding().on(keys, fullScreen);
-         };
-       }
+           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 uiGeolocate(context) {
-         var _geolocationOptions = {
-           // prioritize speed and power usage over precision
-           enableHighAccuracy: false,
-           // don't hang indefinitely getting the location
-           timeout: 6000 // 6sec
+             _fieldsArr.forEach(function (field) {
+               field.on('change', function (t, onInput) {
+                 dispatch.call('change', field, undefined, t, onInput);
+               });
+             });
+           }
 
-         };
+           _fieldsArr.forEach(function (field) {
+             field.tags(_tags);
+           });
 
-         var _locating = uiLoading(context).message(_t.html('geolocate.locating')).blocking(true);
+           selection.call(formFields.fieldsArr(_fieldsArr));
 
-         var _layer = context.layers().layer('geolocate');
+           if (initial) {
+             var commentField = selection.select('.form-field-comment textarea');
+             var commentNode = commentField.node();
 
-         var _position;
+             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 _extent;
 
-         var _timeoutID;
+             utilTriggerEvent(commentField, 'blur');
+             var osm = context.connection();
 
-         var _button = select(null);
+             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
 
-         function click() {
-           if (context.inIntro()) return;
 
-           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
+           var hasGoogle = _tags.comment.match(/google/i);
 
-             navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
-           } else {
-             _locating.close();
+           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);
+         }
 
-             _layer.enabled(null, false);
+         changesetEditor.tags = function (_) {
+           if (!arguments.length) return _tags;
+           _tags = _; // Don't reset _fieldsArr here.
 
-             updateButtonState();
-           }
-         }
+           return changesetEditor;
+         };
 
-         function zoomTo() {
-           context.enter(modeBrowse(context));
-           var map = context.map();
+         changesetEditor.changesetID = function (_) {
+           if (!arguments.length) return _changesetID;
+           if (_changesetID === _) return changesetEditor;
+           _changesetID = _;
+           _fieldsArr = null;
+           return changesetEditor;
+         };
 
-           _layer.enabled(_position, true);
+         return utilRebind(changesetEditor, dispatch, 'on');
+       }
 
-           updateButtonState();
-           map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
-         }
+       var JXON = new function () {
+         var sValueProp = 'keyValue',
+             sAttributesProp = 'keyAttributes',
+             sAttrPref = '@',
 
-         function success(geolocation) {
-           _position = geolocation;
-           var coords = _position.coords;
-           _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
-           zoomTo();
-           finish();
-         }
+         /* you can customize these values */
+         aCache = [],
+             rIsNull = /^\s*$/,
+             rIsBool = /^(?:true|false)$/i;
 
-         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 parseText(sValue) {
+           if (rIsNull.test(sValue)) {
+             return null;
            }
 
-           finish();
-         }
-
-         function finish() {
-           _locating.close(); // unblock ui
+           if (rIsBool.test(sValue)) {
+             return sValue.toLowerCase() === 'true';
+           }
 
+           if (isFinite(sValue)) {
+             return parseFloat(sValue);
+           }
 
-           if (_timeoutID) {
-             clearTimeout(_timeoutID);
+           if (isFinite(Date.parse(sValue))) {
+             return new Date(sValue);
            }
 
-           _timeoutID = undefined;
+           return sValue;
          }
 
-         function updateButtonState() {
-           _button.classed('active', _layer.enabled());
-         }
+         function EmptyTree() {}
 
-         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);
+         EmptyTree.prototype.toString = function () {
+           return 'null';
          };
-       }
-
-       function uiPanelBackground(context) {
-         var background = context.background();
-         var _currSourceName = null;
-         var _metadata = {};
-         var _metadataKeys = ['zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'];
 
-         var debouncedRedraw = debounce(redraw, 250);
-
-         function redraw(selection) {
-           var source = background.baseLayerSource();
-           if (!source) return;
-           var isDG = source.id.match(/^DigitalGlobe/i) !== null;
-           var sourceLabel = source.label();
+         EmptyTree.prototype.valueOf = function () {
+           return null;
+         };
 
-           if (_currSourceName !== sourceLabel) {
-             _currSourceName = sourceLabel;
-             _metadata = {};
-           }
+         function objectify(vValue) {
+           return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
+         }
 
-           selection.html('');
-           var list = selection.append('ul').attr('class', 'background-info');
-           list.append('li').html(_currSourceName);
+         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;
 
-           _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]);
-           });
+           if (bChildren) {
+             for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
+               oNode = oParentNode.childNodes.item(nItem);
 
-           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 (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);
+               }
+             }
+           }
 
-           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
+           var nLevelEnd = aCache.length,
+               vBuiltVal = parseText(sCollectedTxt);
 
+           if (!bHighVerb && (bChildren || bAttributes)) {
+             vResult = nVerb === 0 ? objectify(vBuiltVal) : {};
+           }
 
-           ['DigitalGlobe-Premium', 'DigitalGlobe-Standard'].forEach(function (layerId) {
-             if (source.id !== layerId) {
-               var key = layerId + '-vintage';
-               var sourceVintage = context.background().findSource(key);
+           for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
+             sProp = aCache[nElId].nodeName.toLowerCase();
+             vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);
 
-               if (context.background().showsLayer(sourceVintage)) {
-                 context.background().toggleOverlayLayer(sourceVintage);
+             if (vResult.hasOwnProperty(sProp)) {
+               if (vResult[sProp].constructor !== Array) {
+                 vResult[sProp] = [vResult[sProp]];
                }
+
+               vResult[sProp].push(vContent);
+             } else {
+               vResult[sProp] = vContent;
+               nLength++;
              }
-           });
-         }
+           }
 
-         var debouncedGetMetadata = debounce(getMetadata, 250);
+           if (bAttributes) {
+             var nAttrLen = oParentNode.attributes.length,
+                 sAPrefix = bNesteAttr ? '' : sAttrPref,
+                 oAttrParent = bNesteAttr ? {} : vResult;
 
-         function getMetadata(selection) {
-           var tile = context.container().select('.layer-background img.tile-center'); // tile near viewport center
+             for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
+               oAttrib = oParentNode.attributes.item(nAttrib);
+               oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
+             }
 
-           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
+             if (bNesteAttr) {
+               if (bFreeze) {
+                 Object.freeze(oAttrParent);
+               }
 
-           _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
+               vResult[sAttributesProp] = oAttrParent;
+               nLength -= nAttrLen - 1;
+             }
+           }
 
-             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
+           if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
+             vResult[sValueProp] = vBuiltVal;
+           } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
+             vResult = vBuiltVal;
+           }
 
-             _metadataKeys.forEach(function (k) {
-               if (k === 'zoom' || k === 'vintage') return; // done already
+           if (bFreeze && (bHighVerb || nLength > 0)) {
+             Object.freeze(vResult);
+           }
 
-               var val = result[k];
-               _metadata[k] = val;
-               selection.selectAll('.background-info-list-' + k).classed('hide', !val).selectAll('.background-info-span-' + k).html(val);
-             });
-           });
+           aCache.length = nLevelStart;
+           return vResult;
          }
 
-         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);
-           });
-         };
+         function loadObjTree(oXMLDoc, oParentEl, oParentObj) {
+           var vValue, oChild;
 
-         panel.off = function () {
-           context.map().on('drawn.info-background', null).on('move.info-background', null);
-         };
+           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()));
+           }
 
-         panel.id = 'background';
-         panel.label = _t.html('info_panels.background.title');
-         panel.key = _t('info_panels.background.key');
-         return panel;
-       }
+           for (var sName in oParentObj) {
+             vValue = oParentObj[sName];
 
-       function uiPanelHistory(context) {
-         var osm;
+             if (isFinite(sName) || vValue instanceof Function) {
+               continue;
+             }
+             /* verbosity level is 0 */
 
-         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);
-         }
 
-         function displayUser(selection, userName) {
-           if (!userName) {
-             selection.append('span').html(_t.html('info_panels.history.unknown'));
-             return;
-           }
+             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);
 
-           selection.append('span').attr('class', 'user-name').html(userName);
-           var links = selection.append('div').attr('class', 'links');
+               if (vValue instanceof Object) {
+                 loadObjTree(oXMLDoc, oChild, vValue);
+               } else if (vValue !== null && vValue !== true) {
+                 oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
+               }
 
-           if (osm) {
-             links.append('a').attr('class', 'user-osm-link').attr('href', osm.userURL(userName)).attr('target', '_blank').html('OSM');
+               oParentEl.appendChild(oChild);
+             }
            }
-
-           links.append('a').attr('class', 'user-hdyc-link').attr('href', 'https://hdyc.neis-one.org/?' + userName).attr('target', '_blank').attr('tabindex', -1).html('HDYC');
          }
 
-         function displayChangeset(selection, changeset) {
-           if (!changeset) {
-             selection.append('span').html(_t.html('info_panels.history.unknown'));
-             return;
-           }
+         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;
 
-           selection.append('span').attr('class', 'changeset-id').html(changeset);
-           var links = selection.append('div').attr('class', 'links');
+           return createObjTree(oXMLParent, _nVerb, bFreeze || false, arguments.length > 3 ? bNesteAttributes : _nVerb === 3);
+         };
 
-           if (osm) {
-             links.append('a').attr('class', 'changeset-osm-link').attr('href', osm.changesetURL(changeset)).attr('target', '_blank').html('OSM');
-           }
+         this.unbuild = function (oObjTree) {
+           var oNewDoc = document.implementation.createDocument('', '', null);
+           loadObjTree(oNewDoc, oNewDoc, oObjTree);
+           return oNewDoc;
+         };
 
-           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');
-         }
+         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 redraw(selection) {
-           var selectedNoteID = context.selectedNoteID();
-           osm = context.connection();
-           var selected, note, entity;
+       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);
 
-           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);
-             });
+         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 = '';
 
-             if (selected.length) {
-               entity = context.entity(selected[0]);
+             if (name !== '') {
+               string += ':';
              }
-           }
 
-           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;
-
-           if (entity) {
-             selection.call(redrawEntity, entity);
-           } else if (note) {
-             selection.call(redrawNote, note);
-           }
-         }
+             return string += ' ' + name;
+           });
+           items = itemsEnter.merge(items); // Download changeset link
 
-         function redrawNote(selection, note) {
-           if (!note || note.isNew()) {
-             selection.append('div').html(_t.html('info_panels.history.note_no_history'));
-             return;
-           }
+           var changeset = new osmChangeset().update({
+             id: undefined
+           });
+           var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+           delete changeset.id; // Export without chnageset_id
 
-           var list = selection.append('ul');
-           list.append('li').html(_t.html('info_panels.history.note_comments') + ':').append('span').html(note.comments.length);
+           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 (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);
+           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);
+             });
            }
 
-           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'));
-           }
-         }
+           linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').call(_t.append('commit.download_changes'));
 
-         function redrawEntity(selection, entity) {
-           if (!entity || entity.isNew()) {
-             selection.append('div').html(_t.html('info_panels.history.no_history'));
-             return;
+           function mouseover(d) {
+             if (d.entity) {
+               context.surface().selectAll(utilEntityOrMemberSelector([d.entity.id], context.graph())).classed('hover', true);
+             }
            }
 
-           var links = selection.append('div').attr('class', 'links');
-
-           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');
+           function mouseout() {
+             context.surface().selectAll('.hover').classed('hover', false);
            }
 
-           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);
+           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);
+             }
+           }
          }
 
-         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);
-           });
-         };
-
-         panel.off = function () {
-           context.map().on('drawn.info-history', null);
-           context.on('enter.info-history', null);
-         };
-
-         panel.id = 'history';
-         panel.label = _t.html('info_panels.history.title');
-         panel.key = _t('info_panels.history.key');
-         return panel;
+         return section;
        }
 
-       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 uiCommitWarnings(context) {
+         function commitWarnings(selection) {
+           var issuesBySeverity = context.validator().getIssuesBySeverity({
+             what: 'edited',
+             where: 'all',
+             includeDisabledRules: true
+           });
 
-       function displayLength(m, isImperial) {
-         var d = m * (isImperial ? 3.28084 : 1);
-         var unit;
+           for (var severity in issuesBySeverity) {
+             var issues = issuesBySeverity[severity];
 
-         if (isImperial) {
-           if (d >= 5280) {
-             d /= 5280;
-             unit = 'miles';
-           } else {
-             unit = 'feet';
-           }
-         } else {
-           if (d >= 1000) {
-             d /= 1000;
-             unit = 'kilometers';
-           } else {
-             unit = 'meters';
+             if (severity !== 'error') {
+               // exclude 'fixme' and similar - #8603
+               issues = issues.filter(function (issue) {
+                 return issue.type !== 'help_request';
+               });
+             }
+
+             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;
+             });
+             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 _t('units.' + unit, {
-           quantity: d.toLocaleString(_mainLocalizer.localeCode(), {
-             maximumSignificantDigits: 4
-           })
-         });
+         return commitWarnings;
        }
-       /**
-        * 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 = '';
+       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
 
-         if (isImperial) {
-           if (d >= 6969600) {
-             // > 0.25mi² show mi²
-             d1 = d / 27878400;
-             unit1 = 'square_miles';
-           } else {
-             d1 = d;
-             unit1 = 'square_feet';
-           }
+       var hashtagRegex = /(#[^\u2000-\u206F\u2E00-\u2E7F\s\\'!"#$%()*,.\/:;<=>?@\[\]^`{|}~]+)/g;
+       function uiCommit(context) {
+         var dispatch = dispatch$8('cancel');
 
-           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';
-           }
+         var _userDetails;
 
-           if (d > 1000 && d < 10000000) {
-             // 0.1 - 1000 hectares
-             d2 = d / 10000;
-             unit2 = 'hectares';
-           }
-         }
+         var _selection;
 
-         area = _t('units.' + unit1, {
-           quantity: d1.toLocaleString(locale, {
-             maximumSignificantDigits: 4
-           })
-         });
+         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);
 
-         if (d2) {
-           return _t('units.area_pair', {
-             area1: area,
-             area2: _t('units.' + unit2, {
-               quantity: d2.toLocaleString(locale, {
-                 maximumSignificantDigits: 2
-               })
-             })
-           });
-         } else {
-           return area;
-         }
-       }
+         function commit(selection) {
+           _selection = selection; // Initialize changeset if one does not exist yet.
 
-       function wrap$2(x, min, max) {
-         var d = max - min;
-         return ((x - min) % d + d) % d + min;
-       }
+           if (!context.changeset) initChangeset();
+           loadDerivedChangesetTags();
+           selection.call(render);
+         }
 
-       function clamp$1(x, min, max) {
-         return Math.max(min, Math.min(x, max));
-       }
+         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
 
-       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;
+           if (commentDate > currDate || currDate - commentDate > cutoff) {
+             corePreferences('comment', null);
+             corePreferences('hashtags', null);
+             corePreferences('source', null);
+           } // load in explicitly-set values, if any
 
-         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)
-           });
-         }
 
-         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
-        */
+           if (context.defaultChangesetComment()) {
+             corePreferences('comment', context.defaultChangesetComment());
+             corePreferences('commentDate', Date.now());
+           }
 
+           if (context.defaultChangesetSource()) {
+             corePreferences('source', context.defaultChangesetSource());
+             corePreferences('commentDate', Date.now());
+           }
 
-       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
-        */
+           if (context.defaultChangesetHashtags()) {
+             corePreferences('hashtags', context.defaultChangesetHashtags());
+             corePreferences('commentDate', Date.now());
+           }
 
-       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)
-         });
-       }
+           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 uiPanelLocation(context) {
-         var currLocation = '';
+           findHashtags(tags, true);
+           var hashtags = corePreferences('hashtags');
 
-         function redraw(selection) {
-           selection.html('');
-           var list = selection.append('ul'); // Mouse coordinates
+           if (hashtags) {
+             tags.hashtags = hashtags;
+           }
 
-           var coord = context.map().mouseCoordinates();
+           var source = corePreferences('source');
 
-           if (coord.some(isNaN)) {
-             coord = context.map().center();
+           if (source) {
+             tags.source = source;
            }
 
-           list.append('li').html(dmsCoordinatePair(coord)).append('li').html(decimalCoordinatePair(coord)); // Location Info
+           var photoOverlaysUsed = context.history().photoOverlaysUsed();
 
-           selection.append('div').attr('class', 'location-info').html(currLocation || ' ');
-           debouncedGetLocation(selection, coord);
-         }
+           if (photoOverlaysUsed.length) {
+             var sources = (tags.source || '').split(';'); // include this tag for any photo layer
 
-         var debouncedGetLocation = debounce(getLocation, 250);
+             if (sources.indexOf('streetlevel imagery') === -1) {
+               sources.push('streetlevel imagery');
+             } // add the photo overlays used during editing as sources
 
-         function getLocation(selection, coord) {
-           if (!services.geocoder) {
-             currLocation = _t('info_panels.location.unknown_location');
-             selection.selectAll('.location-info').html(currLocation);
-           } 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);
+
+             photoOverlaysUsed.forEach(function (photoOverlay) {
+               if (sources.indexOf(photoOverlay) === -1) {
+                 sources.push(photoOverlay);
+               }
              });
+             tags.source = context.cleanTagValue(sources.join(';'));
            }
-         }
 
-         var panel = function panel(selection) {
-           selection.call(redraw);
-           context.surface().on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function () {
-             selection.call(redraw);
+           context.changeset = new osmChangeset({
+             tags: tags
            });
-         };
-
-         panel.off = function () {
-           context.surface().on('.info-location', null);
-         };
+         } // Calculates read-only metadata tags based on the user's editing session and applies
+         // them to the changeset.
 
-         panel.id = 'location';
-         panel.label = _t.html('info_panels.location.title');
-         panel.key = _t('info_panels.location.key');
-         return panel;
-       }
 
-       function uiPanelMeasurement(context) {
-         function radiansToMeters(r) {
-           // using WGS84 authalic radius (6371007.1809 m)
-           return r * 6371007.1809;
-         }
+         function loadDerivedChangesetTags() {
+           var osm = context.connection();
+           if (!osm) return;
+           var tags = Object.assign({}, context.changeset.tags); // shallow copy
+           // assign tags for imagery used
 
-         function steradiansToSqmeters(r) {
-           // http://gis.stackexchange.com/a/124857/40446
-           return r / (4 * Math.PI) * 510065621724000;
-         }
+           var imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
+           tags.imagery_used = imageryUsed || 'None'; // assign tags for closed issues and notes
 
-         function toLineString(feature) {
-           if (feature.type === 'LineString') return feature;
-           var result = {
-             type: 'LineString',
-             coordinates: []
-           };
+           var osmClosed = osm.getClosedIDs();
+           var itemType;
 
-           if (feature.type === 'Polygon') {
-             result.coordinates = feature.coordinates[0];
-           } else if (feature.type === 'MultiPolygon') {
-             result.coordinates = feature.coordinates[0][0];
+           if (osmClosed.length) {
+             tags['closed:note'] = context.cleanTagValue(osmClosed.join(';'));
            }
 
-           return result;
-         }
+           if (services.keepRight) {
+             var krClosed = services.keepRight.getClosedIDs();
 
-         var _isImperial = !_mainLocalizer.usesMetric();
+             if (krClosed.length) {
+               tags['closed:keepright'] = context.cleanTagValue(krClosed.join(';'));
+             }
+           }
 
-         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 (services.improveOSM) {
+             var iOsmClosed = services.improveOSM.getClosedCounts();
 
-           if (selectedNoteID && osm) {
-             // selected 1 note
-             var note = osm.getNote(selectedNoteID);
-             heading = _t('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('info_panels.selected', {
-               n: selected.length
-             });
+             for (itemType in iOsmClosed) {
+               tags['closed:improveosm:' + itemType] = context.cleanTagValue(iOsmClosed[itemType].toString());
+             }
+           }
 
-             if (selected.length) {
-               var extent = geoExtent();
+           if (services.osmose) {
+             var osmoseClosed = services.osmose.getClosedCounts();
 
-               for (var i in selected) {
-                 var entity = selected[i];
+             for (itemType in osmoseClosed) {
+               tags['closed:osmose:' + itemType] = context.cleanTagValue(osmoseClosed[itemType].toString());
+             }
+           } // remove existing issue counts
 
-                 extent._extend(entity.extent(graph));
 
-                 geometry = entity.geometry(graph);
+           for (var key in tags) {
+             if (key.match(/(^warnings:)|(^resolved:)/)) {
+               delete tags[key];
+             }
+           }
 
-                 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 addIssueCounts(issues, prefix) {
+             var issuesByType = utilArrayGroupBy(issues, 'type');
 
-                   centroid = d3_geoCentroid(geojsonRewind(Object.assign({}, feature), true));
+             for (var issueType in issuesByType) {
+               var issuesOfType = issuesByType[issueType];
 
-                   if (closed) {
-                     area += steradiansToSqmeters(entity.area(graph));
-                   }
+               if (issuesOfType[0].subtype) {
+                 var issuesBySubtype = utilArrayGroupBy(issuesOfType, 'subtype');
+
+                 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
 
-               if (selected.length > 1) {
-                 geometry = null;
-                 closed = null;
-                 centroid = null;
-               }
 
-               if (selected.length === 2 && selected[0].type === 'node' && selected[1].type === 'node') {
-                 distance = geoSphericalDistance(selected[0].loc, selected[1].loc);
-               }
+           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 (selected.length === 1 && selected[0].type === 'node') {
-                 location = selected[0].loc;
-               } else {
-                 totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
-               }
+           addIssueCounts(warnings, 'warnings'); // add counts of issues resolved by the user's edits
 
-               if (!location && !centroid) {
-                 center = extent.center();
-               }
-             }
-           }
+           var resolvedIssues = context.validator().getResolvedIssues();
+           addIssueCounts(resolvedIssues, 'resolved');
+           context.changeset = context.changeset.update({
+             tags: tags
+           });
+         }
 
-           selection.html('');
+         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
 
-           if (heading) {
-             selection.append('h4').attr('class', 'measurement-heading').html(heading);
-           }
+           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 list = selection.append('ul');
-           var coordItem;
+           body.call(commitWarnings); // Upload Explanation
 
-           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));
-           }
+           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]);
 
-           if (totalNodeCount) {
-             list.append('li').html(_t.html('info_panels.measurement.node_count') + ':').append('span').html(totalNodeCount.toLocaleString(localeCode));
+           if (prose.enter().size()) {
+             // first time, make sure to update user details in prose
+             _userDetails = null;
            }
 
-           if (area) {
-             list.append('li').html(_t.html('info_panels.measurement.area') + ':').append('span').html(displayArea(area, _isImperial));
-           }
+           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
 
-           if (length) {
-             list.append('li').html(_t.html('info_panels.measurement.' + (closed ? 'perimeter' : 'length')) + ':').append('span').html(displayLength(length, _isImperial));
-           }
+           osm.userDetails(function (err, user) {
+             if (err) return;
+             if (_userDetails === user) return; // no change
 
-           if (typeof distance === 'number') {
-             list.append('li').html(_t.html('info_panels.measurement.distance') + ':').append('span').html(displayLength(distance, _isImperial));
-           }
+             _userDetails = user;
+             var userLink = select(document.createElement('div'));
 
-           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));
-           }
+             if (user.image_url) {
+               userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
+             }
 
-           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));
-           }
+             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 (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 requestReview = saveSection.selectAll('.request-review').data([0]); // Enter
 
-           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 requestReviewEnter = requestReview.enter().append('div').attr('class', 'request-review');
+           var requestReviewDomId = utilUniqueDomId('commit-input-request-review');
+           var labelEnter = requestReviewEnter.append('label').attr('for', requestReviewDomId);
+
+           if (!labelEnter.empty()) {
+             labelEnter.call(uiTooltip().title(_t.html('commit.request_review_info')).placement('top'));
            }
-         }
 
-         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);
-           });
-         };
+           labelEnter.append('input').attr('type', 'checkbox').attr('id', requestReviewDomId);
+           labelEnter.append('span').call(_t.append('commit.request_review')); // Update
 
-         panel.off = function () {
-           context.map().on('drawn.info-measurement', null);
-           context.on('enter.info-measurement', null);
-         };
+           requestReview = requestReview.merge(requestReviewEnter);
+           var requestReviewInput = requestReview.selectAll('input').property('checked', isReviewRequested(context.changeset.tags)).on('change', toggleRequestReview); // Buttons
 
-         panel.id = 'measurement';
-         panel.label = _t.html('info_panels.measurement.title');
-         panel.key = _t('info_panels.measurement.key');
-         return panel;
-       }
+           var buttonSection = saveSection.selectAll('.buttons').data([0]); // enter
 
-       var uiInfoPanels = {
-         background: uiPanelBackground,
-         history: uiPanelHistory,
-         location: uiPanelLocation,
-         measurement: uiPanelMeasurement
-       };
+           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
 
-       function uiInfo(context) {
-         var ids = Object.keys(uiInfoPanels);
-         var wasActive = ['measurement'];
-         var panels = {};
-         var active = {}; // create panels
+           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
 
-         ids.forEach(function (k) {
-           if (!panels[k]) {
-             panels[k] = uiInfoPanels[k](context);
-             active[k] = false;
-           }
-         });
+               for (var key in context.changeset.tags) {
+                 // remove any empty keys before upload
+                 if (!key) delete context.changeset.tags[key];
+               }
 
-         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').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
+               context.uploader().save(context.changeset);
+             }
+           }); // remove any existing tooltip
+
+           uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));
+
+           if (uploadBlockerTooltipText) {
+             buttonSection.selectAll('.save-button').call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
+           } // Raw Tag Editor
 
-             infoPanels.selectAll('.panel-content').each(function (d) {
-               select(this).call(panels[d]);
+
+           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);
+
+           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);
            }
+         }
 
-           info.toggle = function (which) {
-             var activeids = ids.filter(function (k) {
-               return active[k];
+         function getUploadBlockerMessage() {
+           var errors = context.validator().getIssuesBySeverity({
+             what: 'edited',
+             where: 'all'
+           }).error;
+
+           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 (which) {
-               // toggle one
-               active[which] = !active[which];
+             if (!hasChangesetComment) {
+               return _t('commit.comment_needed_message');
+             }
+           }
 
-               if (activeids.length === 1 && activeids[0] === which) {
-                 // none active anymore
-                 wasActive = [which];
-               }
+           return null;
+         }
 
-               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 {
-                 wasActive.forEach(function (k) {
-                   active[k] = true;
-                 });
-               }
+         function changeTags(_, changed, onInput) {
+           if (changed.hasOwnProperty('comment')) {
+             if (changed.comment === undefined) {
+               changed.comment = '';
              }
 
-             redraw();
-           };
+             if (!onInput) {
+               corePreferences('comment', changed.comment);
+               corePreferences('commentDate', Date.now());
+             }
+           }
 
-           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
-             });
-             if (!key) return;
-             context.keybinding().on(uiCmd('⌘⇧' + key), function (d3_event) {
-               d3_event.stopImmediatePropagation();
-               d3_event.preventDefault();
-               info.toggle(k);
-             });
-           });
-         }
+           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`
 
-         return info;
-       }
 
-       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;
+           updateChangeset(changed, onInput);
 
-         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;
+           if (_selection) {
+             _selection.call(render);
+           }
          }
 
-         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`
+         function findHashtags(tags, commentOnly) {
+           var detectedHashtags = commentHashtags();
 
-       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 (detectedHashtags.length) {
+             // always remove stored hashtags if there are hashtags in the comment - #4304
+             corePreferences('hashtags', null);
+           }
 
-         if (replacements) {
-           reps = Object.assign(replacements, helpStringReplacements);
-         } else {
-           reps = helpStringReplacements;
-         }
+           if (!detectedHashtags.length || !commentOnly) {
+             detectedHashtags = detectedHashtags.concat(hashtagHashtags());
+           }
 
-         return _t.html(id, reps) // use keyboard key styling for shortcuts
-         .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
-       }
+           var allLowerCase = new Set();
+           return detectedHashtags.filter(function (hashtag) {
+             // Compare tags as lowercase strings, but keep original case tags
+             var lowerCase = hashtag.toLowerCase();
 
-       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
+             if (!allLowerCase.has(lowerCase)) {
+               allLowerCase.add(lowerCase);
+               return true;
+             }
 
+             return false;
+           }); // Extract hashtags from `comment`
 
-       var missingStrings = {};
+           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 checkKey(key, text) {
-         if (_t(key, {
-           "default": undefined
-         }) === undefined) {
-           if (missingStrings.hasOwnProperty(key)) return; // warn once
 
-           missingStrings[key] = text;
-           var missing = key + ': ' + text;
-           if (typeof console !== 'undefined') console.log(missing); // eslint-disable-line
-         }
-       }
+           function hashtagHashtags() {
+             var matches = (tags.hashtags || '').split(/[,;\s]+/).map(function (s) {
+               if (s[0] !== '#') {
+                 s = '#' + s;
+               } // prepend '#'
 
-       function localize(obj) {
-         var key; // Assign name if entity has one..
 
-         var name = obj.tags && obj.tags.name;
+               var matched = s.match(hashtagRegex);
+               return matched && matched[0];
+             }).filter(Boolean); // exclude falsy
 
-         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..
+             return matches || [];
+           }
+         }
 
+         function isReviewRequested(tags) {
+           var rr = tags.review_requested;
+           if (rr === undefined) return false;
+           rr = rr.trim().toLowerCase();
+           return !(rr === '' || rr === 'no');
+         }
 
-         var street = obj.tags && obj.tags['addr:street'];
+         function updateChangeset(changed, onInput) {
+           var tags = Object.assign({}, context.changeset.tags); // shallow copy
 
-         if (street) {
-           key = 'intro.graph.name.' + slugify(street);
-           obj.tags['addr:street'] = _t(key, {
-             "default": street
+           Object.keys(changed).forEach(function (k) {
+             var v = changed[k];
+             k = context.cleanTagKey(k);
+             if (readOnlyTags.indexOf(k) !== -1) return;
+
+             if (v === undefined) {
+               delete tags[k];
+             } else if (onInput) {
+               tags[k] = v;
+             } else {
+               tags[k] = context.cleanTagValue(v);
+             }
            });
-           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 (!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 (str) {
-               if (str.match(/^<.*>$/) !== null) {
-                 delete obj.tags[tag];
-               } else {
-                 obj.tags[tag] = str;
-               }
+             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
 
-         return obj;
-       } // Used to detect squareness.. some duplicataion of code from actionOrthogonalize.
 
-       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 (_userDetails && _userDetails.changesets_count !== undefined) {
+             var changesetsCount = parseInt(_userDetails.changesets_count, 10) + 1; // #4283
 
-         var lowerBound = Math.cos((90 - threshold) * Math.PI / 180); // near right
+             tags.changesets_count = String(changesetsCount); // first 100 edits - new user
 
-         var upperBound = Math.cos(threshold * Math.PI / 180); // near straight
+             if (changesetsCount <= 100) {
+               var s;
+               s = corePreferences('walkthrough_completed');
 
-         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 (s) {
+                 tags['ideditor:walkthrough_completed'] = s;
+               }
 
-           if (mag > lowerBound && mag < upperBound) {
-             return false;
-           }
-         }
+               s = corePreferences('walkthrough_progress');
 
-         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;
-       }
+               if (s) {
+                 tags['ideditor:walkthrough_progress'] = s;
+               }
 
-       function uiCurtain(containerNode) {
-         var surface = select(null),
-             tooltip = select(null),
-             darkness = select(null);
+               s = corePreferences('walkthrough_started');
 
-         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 (s) {
+                 tags['ideditor:walkthrough_started'] = s;
+               }
+             }
+           } else {
+             delete tags.changesets_count;
+           }
 
-           function resize() {
-             surface.attr('width', containerNode.clientWidth).attr('height', containerNode.clientHeight);
-             curtain.cut(darkness.datum());
+           if (!fastDeepEqual(context.changeset.tags, tags)) {
+             context.changeset = context.changeset.update({
+               tags: tags
+             });
            }
          }
-         /**
-          * 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
-          */
-
 
-         curtain.reveal = function (box, html, options) {
-           options = options || {};
+         commit.reset = function () {
+           context.changeset = null;
+         };
 
-           if (typeof box === 'string') {
-             box = select(box).node();
-           }
+         return utilRebind(commit, dispatch, 'on');
+       }
 
-           if (box && box.getBoundingClientRect) {
-             box = copyBox(box.getBoundingClientRect());
-             var containerRect = containerNode.getBoundingClientRect();
-             box.top -= containerRect.top;
-             box.left -= containerRect.left;
-           }
+       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');
 
-           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;
-           }
+         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;
+         };
 
-           var tooltipBox;
+         return modalSelection;
+       }
 
-           if (options.tooltipBox) {
-             tooltipBox = options.tooltipBox;
+       function uiConflicts(context) {
+         var dispatch = dispatch$8('cancel', 'save');
+         var keybinding = utilKeybinding('conflicts');
 
-             if (typeof tooltipBox === 'string') {
-               tooltipBox = select(tooltipBox).node();
-             }
+         var _origChanges;
 
-             if (tooltipBox && tooltipBox.getBoundingClientRect) {
-               tooltipBox = copyBox(tooltipBox.getBoundingClientRect());
-             }
-           } else {
-             tooltipBox = box;
-           }
+         var _conflictList;
 
-           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 _shownConflictIndex;
 
+         function keybindingOn() {
+           select(document).call(keybinding.on('⎋', cancel, true));
+         }
 
-               html = html.replace(/\*\*(.*?)\*\*/g, '<span class="instruction">$1</span>');
-             }
+         function keybindingOff() {
+           select(document).call(keybinding.unbind);
+         }
 
-             html = html.replace(/\*(.*?)\*/g, '<em>$1</em>'); // emphasis
+         function tryAgain() {
+           keybindingOff();
+           dispatch.call('save');
+         }
 
-             html = html.replace(/\{br\}/g, '<br/><br/>'); // linebreak
+         function cancel() {
+           keybindingOff();
+           dispatch.call('cancel');
+         }
 
-             if (options.buttonText && options.buttonCallback) {
-               html += '<div class="button-section">' + '<button href="#" class="button action">' + options.buttonText + '</button></div>';
-             }
+         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
 
-             var classes = 'curtain-tooltip popover tooltip arrowed in ' + (options.tooltipClass || '');
-             tooltip.classed(classes, true).selectAll('.popover-inner').html(html);
+           var detected = utilDetect();
+           var changeset = new osmChangeset();
+           delete changeset.id; // Export without changeset_id
 
-             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 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');
 
-             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.
+           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);
+             });
+           }
 
-             if (options.tooltipClass === 'intro-mouse') {
-               tip.height += 80;
-             } // trim box dimensions to just the portion that fits in the container..
+           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);
+         }
 
+         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..
 
-             if (tooltipBox.top + tooltipBox.height > h) {
-               tooltipBox.height -= tooltipBox.top + tooltipBox.height - h;
-             }
+           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);
+           }
 
-             if (tooltipBox.left + tooltipBox.width > w) {
-               tooltipBox.width -= tooltipBox.left + tooltipBox.width - w;
-             } // determine tooltip placement..
+           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);
+           });
+         }
 
+         function addChoices(selection) {
+           var choices = selection.append('ul').attr('class', 'layer-list').selectAll('li').data(function (d) {
+             return d.choices || [];
+           }); // enter
 
-             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;
+           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 (_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];
-                 }
-               }
-             }
+           choicesEnter.merge(choices).each(function (d) {
+             var ul = this.parentNode;
 
-             if (options.duration !== 0 || !tooltip.classed(side)) {
-               tooltip.call(uiToggle(true));
+             if (ul.__data__.chosen === d.id) {
+               choose(null, ul, d);
              }
+           });
+         }
 
-             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 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);
+         }
 
-             var shiftY = 0;
+         function zoomToEntity(id, extent) {
+           context.surface().selectAll('.hover').classed('hover', false);
+           var entity = context.graph().hasEntity(id);
 
-             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;
-               }
+           if (entity) {
+             if (extent) {
+               context.map().trimmedExtent(extent);
+             } else {
+               context.map().zoomToEase(entity);
              }
 
-             tooltip.selectAll('.popover-inner').style('top', shiftY + 'px');
-           } else {
-             tooltip.classed('in', false).call(uiToggle(false));
+             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)
+         //     ]
+         // }
 
-           curtain.cut(box, options.duration);
-           return tooltip;
+
+         conflicts.conflictList = function (_) {
+           if (!arguments.length) return _conflictList;
+           _conflictList = _;
+           return conflicts;
          };
 
-         curtain.cut = function (datum, duration) {
-           darkness.datum(datum).interrupt();
-           var selection;
+         conflicts.origChanges = function (_) {
+           if (!arguments.length) return _origChanges;
+           _origChanges = _;
+           return conflicts;
+         };
 
-           if (duration === 0) {
-             selection = darkness;
-           } else {
-             selection = darkness.transition().duration(duration || 600).ease(linear$1);
+         conflicts.shownEntityIds = function () {
+           if (_conflictList && typeof _shownConflictIndex === 'number') {
+             return [_conflictList[_shownConflictIndex].id];
            }
 
-           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';
-           });
+           return [];
          };
 
-         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.
+         return utilRebind(conflicts, dispatch, 'on');
+       }
 
+       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');
 
-         function copyBox(src) {
-           return {
-             top: src.top,
-             right: src.right,
-             bottom: src.bottom,
-             left: src.left,
-             width: src.width,
-             height: src.height
-           };
-         }
+         var _expanded = preference === null ? true : preference === 'true';
 
-         return curtain;
-       }
+         var _entityIDs = [];
+         var _issues = [];
 
-       function uiIntroWelcome(context, reveal) {
-         var dispatch$1 = dispatch('done');
-         var chapter = {
-           title: 'intro.welcome.title'
-         };
+         var _activeIssueID;
 
-         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 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
            });
-         }
+         }).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);
+         });
 
-         function practice() {
-           reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.practice'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: words
+         function reloadIssues() {
+           _issues = context.validator().getSharedEntityIssues(_entityIDs, {
+             includeDisabledRules: true
            });
          }
 
-         function words() {
-           reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.words'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: chapters
+         function makeActiveIssue(issueID) {
+           _activeIssueID = issueID;
+           section.selection().selectAll('.issue-container').classed('active', function (d) {
+             return d.id === _activeIssueID;
            });
          }
 
-         function chapters() {
-           dispatch$1.call('done');
-           reveal('.intro-nav-wrap .chapter-navigation', helpHtml('intro.welcome.chapters', {
-             next: _t('intro.navigation.title')
-           }));
-         }
-
-         chapter.enter = function () {
-           welcome();
-         };
+         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
 
-         chapter.exit = function () {
-           context.container().select('.curtain-tooltip.intro-mouse').selectAll('.counter').remove();
-         };
+           containers.exit().remove(); // Enter
 
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
-         };
+           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 utilRebind(chapter, dispatch$1, 'on');
-       }
+             var extent = d.extent(context.graph());
 
-       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 (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
 
-         function timeout(f, t) {
-           timeouts.push(window.setTimeout(f, t));
-         }
+             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
 
-         function eventCancel(d3_event) {
-           d3_event.stopPropagation();
-           d3_event.preventDefault();
-         }
+             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);
+               });
+             }
+           });
+           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
 
-         function isTownHallSelected() {
-           var ids = context.selectedIDs();
-           return ids.length === 1 && ids[0] === hallId;
-         }
+           containers = containers.merge(containersEnter).classed('active', function (d) {
+             return d.id === _activeIssueID;
+           });
+           containers.selectAll('.issue-message').html(function (d) {
+             return d.message(context);
+           }); // fixes
 
-         function dragMap() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial');
-           var msec = transitionTime(townHall, context.map().center());
+           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)
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+             if (d.issue.dateLastRanFix && new Date() - d.issue.dateLastRanFix < 1000) return;
+             d.issue.dateLastRanFix = new Date(); // remove hover-highlighting
 
-           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();
+             utilHighlightEntities(d.issue.entityIds.concat(d.entityIds), false, context);
+             new Promise(function (resolve, reject) {
+               d.onClick(context, resolve, reject);
 
-               if (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
-                 context.map().on('move.intro', null);
-                 timeout(function () {
-                   continueTo(zoomMap);
-                 }, 3000);
+               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();
              });
-           }, msec + 100);
+           }).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';
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
-           }
-         }
+             if (iconName.startsWith('maki')) {
+               iconName += '-15';
+             }
 
-         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
-             });
+             select(this).call(svgIcon('#' + iconName, 'fix-icon'));
            });
-           context.map().on('move.intro', function () {
-             if (context.map().zoom() !== zoomStart) {
-               context.map().on('move.intro', null);
-               timeout(function () {
-                 continueTo(features);
-               }, 3000);
+           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;
            });
+         }
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+
+           if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+             _entityIDs = val;
+             _activeIssueID = null;
+             reloadIssues();
            }
-         }
 
-         function features() {
-           var onClick = function onClick() {
-             continueTo(pointsLinesAreas);
-           };
+           return section;
+         };
 
-           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
-             });
-           });
+         return section;
+       }
 
-           function continueTo(nextStep) {
-             context.map().on('drawn.intro', null);
-             nextStep();
-           }
-         }
+       function uiPresetIcon() {
+         var _preset;
 
-         function pointsLinesAreas() {
-           var onClick = function onClick() {
-             continueTo(nodesWays);
-           };
+         var _geometry;
 
-           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 _sizeClass = 'medium';
 
-           function continueTo(nextStep) {
-             context.map().on('drawn.intro', null);
-             nextStep();
-           }
+         function isSmall() {
+           return _sizeClass === 'small';
          }
 
-         function nodesWays() {
-           var onClick = function onClick() {
-             continueTo(clickTownHall);
-           };
-
-           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
-             });
-           });
+         function presetIcon(selection) {
+           selection.each(render);
+         }
 
-           function continueTo(nextStep) {
-             context.map().on('drawn.intro', null);
-             nextStep();
-           }
+         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';
          }
 
-         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
+         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);
+         }
 
-           context.history().on('change.intro', function () {
-             if (!context.hasEntity(hallId)) {
-               continueTo(clickTownHall);
-             }
-           });
+         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);
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
+           if (category) {
+             categoryBorder.selectAll('path').attr('class', "area ".concat(category.id));
            }
          }
 
-         function selectedTownHall() {
-           if (!isTownHallSelected()) return clickTownHall();
-           var entity = context.hasEntity(hallId);
-           if (!entity) return clickTownHall();
-           var box = pointBox(entity.loc, context);
-
-           var onClick = function onClick() {
-             continueTo(editorTownHall);
-           };
+         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);
+         }
 
-           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
-             });
+         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));
            });
-           context.history().on('change.intro', function () {
-             if (!context.hasEntity(hallId)) {
-               continueTo(clickTownHall);
-             }
+           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 continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
+           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);
+             });
            }
+
+           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 editorTownHall() {
-           if (!isTownHallSelected()) return clickTownHall(); // disallow scrolling
+         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
 
-           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           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 onClick = function onClick() {
-             continueTo(presetTownHall);
-           };
+         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
 
-           reveal('.entity-editor-pane', helpHtml('intro.navigation.editor_townhall'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: onClick
+           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));
            });
-           context.on('exit.intro', function () {
-             continueTo(clickTownHall);
+           [[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);
            });
-           context.history().on('change.intro', function () {
-             if (!context.hasEntity(hallId)) {
-               continueTo(clickTownHall);
+           route = routeEnter.merge(route);
+
+           if (drawRoute) {
+             var routeType = p.tags.type === 'waterway' ? 'waterway' : p.tags.route;
+             var segmentPresetIDs = routeSegments[routeType];
+
+             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));
              }
-           });
+           }
+         }
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             nextStep();
+         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 = '';
+
+           if (isMaki) {
+             suffix = isSmall() && geom === 'point' ? '-11' : '-15';
            }
+
+           icon.selectAll('use').attr('href', '#' + picon + suffix);
          }
 
-         function presetTownHall() {
-           if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
+         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.
 
-           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 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']
+         };
 
-           var entity = context.entity(context.selectedIDs()[0]);
-           var preset = _mainPresetIndex.match(entity, context.graph());
+         function render() {
+           var p = _preset.apply(this, arguments);
 
-           var onClick = function onClick() {
-             continueTo(fieldsTownHall);
-           };
+           var geom = _geometry ? _geometry.apply(this, arguments) : null;
 
-           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 (geom === 'relation' && p.tags && (p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route] || p.tags.type === 'waterway')) {
+             geom = 'route';
+           }
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             nextStep();
+           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) : {};
+
+           for (var k in tags) {
+             if (tags[k] === '*') {
+               tags[k] = 'yes';
+             }
            }
+
+           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);
          }
 
-         function fieldsTownHall() {
-           if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
+         presetIcon.preset = function (val) {
+           if (!arguments.length) return _preset;
+           _preset = utilFunctor(val);
+           return presetIcon;
+         };
 
-           context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
+         presetIcon.geometry = function (val) {
+           if (!arguments.length) return _geometry;
+           _geometry = utilFunctor(val);
+           return presetIcon;
+         };
 
-           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+         presetIcon.sizeClass = function (val) {
+           if (!arguments.length) return _sizeClass;
+           _sizeClass = val;
+           return presetIcon;
+         };
 
-           var onClick = function onClick() {
-             continueTo(closeTownHall);
-           };
+         return presetIcon;
+       }
 
-           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);
-             }
-           });
+       function uiSectionFeatureType(context) {
+         var dispatch = dispatch$8('choose');
+         var _entityIDs = [];
+         var _presets = [];
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             nextStep();
+         var _tagReference;
+
+         var section = uiSection('feature-type', context).label(_t.html('inspector.feature_type')).disclosureContent(renderDisclosureContent);
+
+         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 (_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);
            }
-         }
 
-         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);
+           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();
            });
-           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
-             });
+           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 continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
          }
 
-         function searchStreet() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial'); // ensure spring street exists
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return section;
+         };
 
-           var msec = transitionTime(springStreet, context.map().center());
+         section.presets = function (val) {
+           if (!arguments.length) return _presets; // don't reload the same preset
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
+           if (!utilArrayIdentical(val, _presets)) {
+             _presets = val;
+
+             if (_presets.length === 1) {
+               _tagReference = uiTagReference(_presets[0].reference()).showing(false);
+             }
            }
 
-           context.map().centerZoomEase(springStreet, 19, msec); // ..and user can see it
+           return section;
+         };
 
-           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);
+         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;
+           }
+
+           return Object.keys(counts).sort(function (geom1, geom2) {
+             return counts[geom2] - counts[geom1];
+           });
          }
 
-         function checkSearchResult() {
-           var first = context.container().select('.feature-list-item:nth-child(0n+2)'); // skip "No Results" item
+         return utilRebind(section, dispatch, 'on');
+       }
 
-           var firstName = first.select('.entity-name');
-           var name = _t('intro.graph.name.spring-street');
+       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);
 
-           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);
-           }
+         var _state;
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.container().select('.search-header input').on('keydown.intro', null).on('keyup.intro', null);
-             nextStep();
-           }
-         }
+         var _fieldsArr;
 
-         function selectedStreet() {
-           if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
-             return searchStreet();
-           }
+         var _presets = [];
 
-           var onClick = function onClick() {
-             continueTo(editorStreet);
-           };
+         var _tags;
 
-           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.
+         var _entityIDs;
 
-           context.on('enter.intro', function (mode) {
-             if (!context.hasEntity(springStreetId)) {
-               return continueTo(searchStreet);
-             }
+         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;
 
-             var ids = context.selectedIDs();
+             _presets.forEach(function (preset) {
+               var fields = preset.fields();
+               var moreFields = preset.moreFields();
+               allFields = utilArrayUnion(allFields, fields);
+               allMoreFields = utilArrayUnion(allMoreFields, moreFields);
 
-             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)
-             }
-           });
+               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 continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+             if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
+               _fieldsArr.push(uiField(context, presetsManager.field('restrictions'), _entityIDs));
+             }
 
-         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 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 continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
+             _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 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');
+           _fieldsArr.forEach(function (field) {
+             field.state(_state).tags(_tags);
+           });
+
+           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));
              }
            });
          }
 
-         chapter.enter = function () {
-           dragMap();
-         };
+         section.presets = function (val) {
+           if (!arguments.length) return _presets;
 
-         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);
-         };
+           if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
+             _presets = val;
+             _fieldsArr = null;
+           }
 
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
+           return section;
          };
 
-         return utilRebind(chapter, dispatch$1, 'on');
-       }
-
-       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'
+         section.state = function (val) {
+           if (!arguments.length) return _state;
+           _state = val;
+           return section;
          };
 
-         function timeout(f, t) {
-           timeouts.push(window.setTimeout(f, t));
-         }
+         section.tags = function (val) {
+           if (!arguments.length) return _tags;
+           _tags = val; // Don't reset _fieldsArr here.
 
-         function eventCancel(d3_event) {
-           d3_event.stopPropagation();
-           d3_event.preventDefault();
-         }
+           return section;
+         };
 
-         function addPoint() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial');
-           var msec = transitionTime(intersection, context.map().center());
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
+           if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
+             _entityIDs = val;
+             _fieldsArr = null;
            }
 
-           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);
-
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+           return section;
+         };
 
-         function placePoint() {
-           if (context.mode().id !== 'add-point') {
-             return chapter.restart();
-           }
+         return utilRebind(section, dispatch, 'on');
+       }
 
-           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);
+       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;
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+         var _entityIDs;
 
-         function searchPreset() {
-           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-             return addPoint();
-           } // disallow scrolling
+         var _maxMembers = 1000;
 
+         function downloadMember(d3_event, d) {
+           d3_event.preventDefault(); // display the loading indicator
 
-           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);
-             }
+           select(this.parentNode).classed('tag-reference-loading', true);
+           context.loadEntity(d.id, function () {
+             section.reRender();
+           });
+         }
 
-             var ids = context.selectedIDs();
+         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
 
-             if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
-               // keep the user's point selected..
-               context.enter(modeSelect(context, [_pointID])); // disallow scrolling
+           utilHighlightEntities([d.id], true, context);
+         }
 
-               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);
-             }
-           });
+         function selectMember(d3_event, d) {
+           d3_event.preventDefault(); // remove the hover-highlight styling
 
-           function checkPresetSearch() {
-             var first = context.container().select('.preset-list-item:first-child');
+           utilHighlightEntities([d.id], false, context);
+           var entity = context.entity(d.id);
+           var mapExtent = context.map().extent();
 
-             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);
-               });
-             }
+           if (!entity.intersects(mapExtent, context.graph())) {
+             // zoom to the entity if its extent is not visible now
+             context.map().zoomToEase(entity);
            }
 
-           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();
-           }
+           context.enter(modeSelect(context, [d.id]));
          }
 
-         function aboutFeatureEditor() {
-           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-             return addPoint();
-           }
-
-           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);
-           });
+         function changeRole(d3_event, d) {
+           var oldRole = d.role;
+           var newRole = context.cleanRelationRole(select(this).property('value'));
 
-           function continueTo(nextStep) {
-             context.on('exit.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 addName() {
-           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-             return addPoint();
-           } // reset pane, in case user happened to change it..
+         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
+           }));
 
+           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.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 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);
 
-             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);
-                 }
+             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);
                });
-               tooltip.select('.instruction').style('display', 'none');
-             } else {
-               reveal('.entity-editor-pane', addNameString, {
-                 tooltipClass: 'intro-points-describe'
+               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);
              }
-           }, 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 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 continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+           if (taginfo) {
+             wrapEnter.each(bindTypeahead);
+           } // update
 
-         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();
-           }
-         }
+           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 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..
+               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 oldPreset = _mainPresetIndex.match(entity, context.graph());
-           context.replace(actionChangePreset(_pointID, oldPreset, cafePreset));
-           context.enter(modeBrowse(context));
-           var msec = transitionTime(entity.loc, context.map().center());
+                 return 'translateY(-100%)';
+               } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
+                 if (targetIndex === null || index2 < targetIndex) {
+                   targetIndex = index2;
+                 }
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+                 return 'translateY(100%)';
+               }
 
-           context.map().centerEase(entity.loc, msec);
-           timeout(function () {
-             var box = pointBox(entity.loc, context);
-             reveal(box, helpHtml('intro.points.reselect'), {
-               duration: 600
+               return null;
              });
-             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..
+           }).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.on('enter.intro', function (mode) {
-               if (mode.id !== 'select') return;
-               continueTo(updatePoint);
-             });
-           }, msec + 100);
+             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.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+           function bindTypeahead(d) {
+             var row = select(this);
+             var role = row.selectAll('input.member-role');
+             var origValue = role.property('value');
+
+             function sort(value, data) {
+               var sameletter = [];
+               var other = [];
+
+               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]);
+                 }
+               }
 
-         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 sameletter.concat(other);
+             }
 
+             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.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);
+               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';
+               }
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
+               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 unbind() {
+             var row = select(this);
+             row.selectAll('input.member-role').call(uiCombobox.off, context);
            }
          }
 
-         function updateCloseEditor() {
-           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-             return continueTo(reselectPoint);
-           } // reset pane, in case user happened to change it..
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return section;
+         };
 
+         return section;
+       }
 
-           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-           context.on('exit.intro', function () {
-             continueTo(rightClickPoint);
+       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;
            });
-           timeout(function () {
-             reveal('.entity-editor-pane', helpHtml('intro.points.update_close', {
-               button: icon('#iD-icon-close', 'inline')
-             }));
-           }, 500);
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
+           for (var i in memberIndexes) {
+             graph = actionDeleteMember(relationId, memberIndexes[i])(graph);
            }
-         }
 
-         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
+           return graph;
+         };
+       }
 
-           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
+       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 = [];
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             context.map().on('move.intro', null);
-             nextStep();
-           }
-         }
+         var _showBlank;
 
-         function enterDelete() {
-           if (!_pointID) return chapter.restart();
-           var entity = context.hasEntity(_pointID);
-           if (!entity) return chapter.restart();
-           var node = selectMenuItem(context, 'delete').node();
+         var _maxMemberships = 1000;
 
-           if (!node) {
-             return continueTo(rightClickPoint);
-           }
+         function getSharedParentRelations() {
+           var parents = [];
 
-           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
+           for (var i = 0; i < _entityIDs.length; i++) {
+             var entity = context.graph().hasEntity(_entityIDs[i]);
+             if (!entity) continue;
 
-           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 (i === 0) {
+               parents = context.graph().parentRelations(entity);
+             } else {
+               parents = utilArrayIntersection(parents, context.graph().parentRelations(entity));
              }
-           });
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro', null);
-             context.history().on('change.intro', null);
-             context.on('exit.intro', null);
-             nextStep();
+             if (!parents.length) break;
            }
-         }
-
-         function undo() {
-           context.history().on('change.intro', function () {
-             continueTo(play);
-           });
-           reveal('.top-toolbar button.undo-button', helpHtml('intro.points.undo'));
 
-           function continueTo(nextStep) {
-             context.history().on('change.intro', null);
-             nextStep();
-           }
+           return parents;
          }
 
-         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 getMemberships() {
+           var memberships = [];
+           var relations = getSharedParentRelations().slice(0, _maxMemberships);
+           var isMultiselect = _entityIDs.length > 1;
+           var i, relation, membership, index, member, indexedMember;
 
-         chapter.enter = function () {
-           addPoint();
-         };
+           for (i = 0; i < relations.length; i++) {
+             relation = relations[i];
+             membership = {
+               relation: relation,
+               members: [],
+               hash: osmEntity.key(relation)
+             };
 
-         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);
-         };
+             for (index = 0; index < relation.members.length; index++) {
+               member = relation.members[index];
 
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
-         };
+               if (_entityIDs.indexOf(member.id) !== -1) {
+                 indexedMember = Object.assign({}, member, {
+                   index: index
+                 });
+                 membership.members.push(indexedMember);
+                 membership.hash += ',' + index.toString();
 
-         return utilRebind(chapter, dispatch$1, 'on');
-       }
+                 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 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 (membership.members.length) memberships.push(membership);
+           }
 
-         var _areaID;
+           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;
+         }
 
-         var chapter = {
-           title: 'intro.areas.title'
-         };
+         function selectRelation(d3_event, d) {
+           d3_event.preventDefault(); // remove the hover-highlight styling
 
-         function timeout(f, t) {
-           timeouts.push(window.setTimeout(f, t));
+           utilHighlightEntities([d.relation.id], false, context);
+           context.enter(modeSelect(context, [d.relation.id]));
          }
 
-         function eventCancel(d3_event) {
-           d3_event.stopPropagation();
+         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
 
-         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);
+           utilHighlightEntities([d.relation.id], true, context);
          }
 
-         function addArea() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial');
-           _areaID = null;
-           var msec = transitionTime(playground, context.map().center());
+         function changeRole(d3_event, d) {
+           if (d === 0) return; // called on newrow (shouldn't happen)
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+           if (_inChange) return; // avoid accidental recursive call #5731
 
-           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);
+           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;
+           });
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
+           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();
            }
+
+           _inChange = false;
          }
 
-         function startPlayground() {
-           if (context.mode().id !== 'add-area') {
-             return chapter.restart();
-           }
+         function addMembership(d, role) {
+           this.blur(); // avoid keeping focus on the button
 
-           _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
+           _showBlank = false;
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
+           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 continuePlayground() {
-           if (context.mode().id !== 'draw-area') {
-             return chapter.restart();
+           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));
            }
+         }
 
-           _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 deleteMembership(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button
 
-           context.on('enter.intro', function (mode) {
-             if (mode.id === 'draw-area') {
-               var entity = context.hasEntity(context.selectedIDs()[0]);
+           if (d === 0) return; // called on newrow (shouldn't happen)
+           // remove the hover-highlight styling
 
-               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();
-             }
+           utilHighlightEntities([d.relation.id], false, context);
+           var indexes = d.members.map(function (member) {
+             return member.index;
            });
-
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
+           context.perform(actionDeleteMembers(d.relation.id, indexes), _t('operations.delete_member.annotation', {
+             n: _entityIDs.length
+           }));
+           context.validator().validate();
          }
 
-         function finishPlayground() {
-           if (context.mode().id !== 'draw-area') {
-             return chapter.restart();
+         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 baseDisplayLabel(entity) {
+             var matched = _mainPresetIndex.match(entity, graph);
+             var presetName = matched && matched.name() || _t('inspector.relation');
+             var entityName = utilDisplayName(entity) || '';
+             return presetName + ' ' + entityName;
            }
 
-           _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
+           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
                });
              });
-           }, 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();
-             }
-           });
+             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.map().on('move.intro drawn.intro', null);
-             context.on('enter.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;
+               });
+             });
            }
+
+           result.forEach(function (obj) {
+             obj.title = obj.value;
+           });
+           result.unshift(newRelation);
+           callback(result);
          }
 
-         function searchPresets() {
-           if (!_areaID || !context.hasEntity(_areaID)) {
-             return addArea();
-           }
+         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
 
-           var ids = context.selectedIDs();
+           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
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-             context.enter(modeSelect(context, [_areaID]));
-           } // disallow scrolling
+           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);
 
+           if (taginfo) {
+             wrapEnter.each(bindTypeahead);
+           }
 
-           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..
+           var newMembership = list.selectAll('.member-row-new').data(_showBlank ? [0] : []); // Exit
 
-           context.on('enter.intro', function (mode) {
-             if (!_areaID || !context.hasEntity(_areaID)) {
-               return continueTo(addArea);
-             }
+           newMembership.exit().remove(); // Enter
 
-             var ids = context.selectedIDs();
+           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 (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..
+           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.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
+           var addRow = selection.selectAll('.add-row').data([0]); // enter
 
-               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);
-             }
-           });
+           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 checkPresetSearch() {
-             var first = context.container().select('.preset-list-item:first-child');
+           addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+           // update
 
-             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);
-               });
-             }
-           }
+           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.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 acceptEntity(d) {
+             if (!d) {
+               cancelEntity();
+               return;
+             } // remove hover-higlighting
 
-         function clickAddField() {
-           if (!_areaID || !context.hasEntity(_areaID)) {
-             return addArea();
+
+             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);
            }
 
-           var ids = context.selectedIDs();
+           function cancelEntity() {
+             var input = newMembership.selectAll('.member-entity-input');
+             input.property('value', ''); // remove hover-higlighting
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-             return searchPresets();
+             context.surface().selectAll('.highlighted').classed('highlighted', false);
            }
 
-           if (!context.container().select('.form-field-description').empty()) {
-             return continueTo(describePlayground);
-           } // disallow scrolling
-
+           function bindTypeahead(d) {
+             var row = select(this);
+             var role = row.selectAll('input.member-role');
+             var origValue = role.property('value');
 
-           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 sort(value, data) {
+               var sameletter = [];
+               var other = [];
 
-             var entity = context.entity(_areaID);
+               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]);
+                 }
+               }
 
-             if (entity.tags.description) {
-               return continueTo(play);
-             } // scroll "Add field" into view
+               return sameletter.concat(other);
+             }
 
+             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);
+             }));
+           }
 
-             var box = context.container().select('.more-fields').node().getBoundingClientRect();
+           function unbind() {
+             var row = select(this);
+             row.selectAll('input.member-role').call(uiCombobox.off, context);
+           }
+         }
 
-             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);
-                 };
-               });
-             }
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           _showBlank = false;
+           return section;
+         };
 
-             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
+         return section;
+       }
 
-           context.on('exit.intro', function () {
-             return continueTo(searchPresets);
+       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
            });
-
-           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();
+         }).disclosureContent(renderDisclosureContent);
+         context.history().on('change.selectionList', function (difference) {
+           if (difference) {
+             section.reRender();
            }
+         });
+
+         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 chooseDescriptionField() {
-           if (!_areaID || !context.hasEntity(_areaID)) {
-             return addArea();
-           }
+         function deselectEntity(d3_event, entity) {
+           var selectedIDs = _selectedIDs.slice();
 
-           var ids = context.selectedIDs();
+           var index = selectedIDs.indexOf(entity.id);
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-             return searchPresets();
+           if (index > -1) {
+             selectedIDs.splice(index, 1);
+             context.enter(modeSelect(context, selectedIDs));
            }
+         }
 
-           if (!context.container().select('.form-field-description').empty()) {
-             return continueTo(describePlayground);
-           } // Make sure combobox is ready..
+         function renderDisclosureContent(selection) {
+           var list = selection.selectAll('.feature-list').data([0]);
+           list = list.enter().append('ul').attr('class', 'feature-list').merge(list);
 
+           var entities = _selectedIDs.map(function (id) {
+             return context.hasEntity(id);
+           }).filter(Boolean);
 
-           if (context.container().select('div.combobox').empty()) {
-             return continueTo(clickAddField);
-           } // Watch for the combobox to go away..
+           var items = list.selectAll('.feature-list-item').data(entities, osmEntity.key);
+           items.exit().remove(); // Enter
 
+           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
 
-           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.
-             }
-           }, 300);
-           reveal('div.combobox', helpHtml('intro.areas.choose_field', {
-             field: descriptionField.label()
-           }), {
-             duration: 300
+           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());
            });
-           context.on('exit.intro', function () {
-             return continueTo(searchPresets);
+           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);
            });
-
-           function continueTo(nextStep) {
-             if (watcher) window.clearInterval(watcher);
-             context.on('exit.intro', null);
-             nextStep();
-           }
          }
 
-         function describePlayground() {
-           if (!_areaID || !context.hasEntity(_areaID)) {
-             return addArea();
-           }
+         return section;
+       }
 
-           var ids = context.selectedIDs();
+       function uiEntityEditor(context) {
+         var dispatch = dispatch$8('choose');
+         var _state = 'select';
+         var _coalesceChanges = false;
+         var _modified = false;
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-             return searchPresets();
-           } // reset pane, in case user happened to change it..
+         var _base;
 
+         var _entityIDs;
 
-           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+         var _activePresets = [];
 
-           if (context.container().select('.form-field-description').empty()) {
-             return continueTo(retryChooseDescription);
-           }
+         var _newFeature;
 
-           context.on('exit.intro', function () {
-             continueTo(play);
-           });
-           reveal('.entity-editor-pane', helpHtml('intro.areas.describe_playground', {
-             button: icon('#iD-icon-close', 'inline')
-           }), {
-             duration: 300
-           });
+         var _sections;
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
-           }
-         }
+         function entityEditor(selection) {
+           var combinedTags = utilCombinedTags(_entityIDs, context.graph()); // Header
 
-         function retryChooseDescription() {
-           if (!_areaID || !context.hasEntity(_areaID)) {
-             return addArea();
-           }
+           var header = selection.selectAll('.header').data([0]); // Enter
 
-           var ids = context.selectedIDs();
+           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
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-             return searchPresets();
-           } // reset pane, in case user happened to change it..
+           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
 
+           var body = selection.selectAll('.inspector-body').data([0]); // Enter
 
-           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);
-             }
-           });
-           context.on('exit.intro', function () {
-             return continueTo(searchPresets);
-           });
+           var bodyEnter = body.enter().append('div').attr('class', 'entity-editor inspector-body sep-top'); // Update
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
+           body = body.merge(bodyEnter);
+
+           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)];
            }
-         }
 
-         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');
+           _sections.forEach(function (section) {
+             if (section.entityIDs) {
+               section.entityIDs(_entityIDs);
              }
-           });
-         }
 
-         chapter.enter = function () {
-           addArea();
-         };
+             if (section.presets) {
+               section.presets(_activePresets);
+             }
 
-         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);
-         };
+             if (section.tags) {
+               section.tags(combinedTags);
+             }
 
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
-         };
+             if (section.state) {
+               section.state(_state);
+             }
 
-         return utilRebind(chapter, dispatch$1, 'on');
-       }
+             body.call(section.render);
+           });
 
-       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'
-         };
+           context.history().on('change.entity-editor', historyChanged);
 
-         function timeout(f, t) {
-           timeouts.push(window.setTimeout(f, t));
-         }
+           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);
 
-         function eventCancel(d3_event) {
-           d3_event.stopPropagation();
-           d3_event.preventDefault();
-         }
+             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.
 
-         function addLine() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial');
-           var msec = transitionTime(tulipRoadStart, context.map().center());
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+         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
 
-           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);
+             for (var k in changed) {
+               if (!k) continue;
+               var v = changed[k];
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+               if (_typeof(v) === 'object') {
+                 // a "key only" tag change
+                 tags[k] = tags[v.oldKey];
+               } else if (v !== undefined || tags.hasOwnProperty(k)) {
+                 tags[k] = v;
+               }
+             }
 
-         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 (!onInput) {
+               tags = utilCleanTags(tags);
+             }
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
+             if (!fastDeepEqual(entity.tags, tags)) {
+               actions.push(actionChangeTags(entityID, tags));
+             }
            }
-         }
 
-         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
+           if (actions.length) {
+             var combinedAction = function combinedAction(graph) {
+               actions.forEach(function (action) {
+                 graph = action(graph);
                });
-             });
-           }, 550); // after easing..
+               return graph;
+             };
 
-           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;
+             var annotation = _t('operations.change_tags.annotation');
+
+             if (_coalesceChanges) {
+               context.overwrite(combinedAction, annotation);
              } else {
-               return chapter.restart();
+               context.perform(combinedAction, annotation);
+               _coalesceChanges = !!onInput;
              }
-           });
+           } // if leaving field (blur event), rerun validation
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
+
+           if (!onInput) {
+             context.validator().validate();
            }
          }
 
-         function isLineConnected() {
-           var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
+         function revertTags(keys) {
+           var actions = [];
 
-           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;
-             });
-           });
-         }
+           for (var i in _entityIDs) {
+             var entityID = _entityIDs[i];
+             var original = context.graph().base().entities[entityID];
+             var changed = {};
 
-         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);
-         }
+             for (var j in keys) {
+               var key = keys[j];
+               changed[key] = original ? original.tags[key] : undefined;
+             }
 
-         function continueLine() {
-           if (context.mode().id !== 'draw-line') return chapter.restart();
+             var entity = context.entity(entityID);
+             var tags = Object.assign({}, entity.tags); // shallow copy
 
-           var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
+             for (var k in changed) {
+               if (!k) continue;
+               var v = changed[k];
 
-           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 (v !== undefined || tags.hasOwnProperty(k)) {
+                 tags[k] = v;
+               }
+             }
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
+             tags = utilCleanTags(tags);
+
+             if (!fastDeepEqual(entity.tags, tags)) {
+               actions.push(actionChangeTags(entityID, tags));
+             }
            }
-         }
 
-         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 (actions.length) {
+             var combinedAction = function combinedAction(graph) {
+               actions.forEach(function (action) {
+                 graph = action(graph);
+               });
+               return 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
+             var annotation = _t('operations.change_tags.annotation');
 
-           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 (_coalesceChanges) {
+               context.overwrite(combinedAction, annotation);
+             } else {
+               context.perform(combinedAction, annotation);
+               _coalesceChanges = false;
+             }
            }
+
+           context.validator().validate();
          }
 
-         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);
+         entityEditor.modified = function (val) {
+           if (!arguments.length) return _modified;
+           _modified = val;
+           return entityEditor;
+         };
 
-           function continueTo(nextStep) {
-             context.container().select('.preset-list-button').on('click.intro', null);
-             context.on('exit.intro', null);
-             nextStep();
-           }
-         } // selected wrong road type
+         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
 
-         function retryPresetResidential() {
-           if (context.mode().id !== 'select') return chapter.restart();
-           context.on('exit.intro', function () {
-             return chapter.restart();
-           }); // disallow scrolling
+           _base = context.graph();
+           _coalesceChanges = false;
+           if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) return entityEditor; // exit early if no change
 
-           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);
+           _entityIDs = val;
+           loadActivePresets(true);
+           return entityEditor.modified(false);
+         };
 
-           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();
+         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;
            }
-         }
 
-         function nameRoad() {
-           context.on('exit.intro', function () {
-             continueTo(didNameRoad);
+           var matches = Object.keys(counts).sort(function (p1, p2) {
+             return counts[p2] - counts[p1];
+           }).map(function (pID) {
+             return _mainPresetIndex.item(pID);
            });
-           timeout(function () {
-             reveal('.entity-editor-pane', helpHtml('intro.lines.name_road', {
-               button: icon('#iD-icon-close', 'inline')
-             }), {
-               tooltipClass: 'intro-lines-name_road'
-             });
-           }, 500);
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
+           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;
            }
+
+           entityEditor.presets(matches);
          }
 
-         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);
+         entityEditor.presets = function (val) {
+           if (!arguments.length) return _activePresets; // don't reload the same preset
 
-           function continueTo(nextStep) {
-             nextStep();
+           if (!utilArrayIdentical(val, _activePresets)) {
+             _activePresets = val;
            }
-         }
 
-         function updateLine() {
-           context.history().reset('doneAddLine');
+           return entityEditor;
+         };
 
-           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-             return chapter.restart();
-           }
+         return utilRebind(entityEditor, dispatch, 'on');
+       }
 
-           var msec = transitionTime(woodRoadDragMidpoint, context.map().center());
+       var sexagesimal = {exports: {}};
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+       sexagesimal.exports = element;
+       var pair_1 = sexagesimal.exports.pair = pair;
+       sexagesimal.exports.format = format;
+       sexagesimal.exports.formatPair = formatPair;
+       sexagesimal.exports.coordToDMS = coordToDMS;
 
-           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 element(input, dims) {
+         var result = search(input, dims);
+         return result === null ? null : result.val;
+       }
 
-             var advance = function advance() {
-               continueTo(addNode);
-             };
+       function formatPair(input) {
+         return format(input.lat, 'lat') + ' ' + format(input.lon, 'lon');
+       } // Is 0 North or South?
 
-             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);
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
-           }
-         }
+       function format(input, dim) {
+         var dms = coordToDMS(input, dim);
+         return dms.whole + '° ' + (dms.minutes ? dms.minutes + '\' ' : '') + (dms.seconds ? dms.seconds + '" ' : '') + dms.dir;
+       }
 
-         function addNode() {
-           context.history().reset('doneAddLine');
+       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
+         };
+       }
 
-           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-             return chapter.restart();
-           }
+       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
 
-           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);
-             }
+         var matched = m[0]; // extract dimension.. m[1] = leading, m[5] = trailing
 
-             if (changed.created().length === 1) {
-               timeout(function () {
-                 continueTo(startDragEndpoint);
-               }, 500);
-             }
-           });
-           context.on('enter.intro', function (mode) {
-             if (mode.id !== 'select') {
-               continueTo(updateLine);
-             }
-           });
+         var dim;
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+         if (m[1] && m[5]) {
+           // if matched both..
+           dim = m[1]; // keep leading
 
-         function startDragEndpoint() {
-           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-             return continueTo(updateLine);
-           }
+           matched = matched.slice(0, -1); // remove trailing dimension from match
+         } else {
+           dim = m[1] || m[5];
+         } // if unrecognized dimension
 
-           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 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 (dim && dims.indexOf(dim) === -1) return null; // extract DMS
 
-             if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
-               continueTo(finishDragEndpoint);
-             }
-           });
+         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 continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
-           }
+       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;
+
+         if (one.dim) {
+           return swapdim(one.val, two.val, one.dim);
+         } else {
+           return [one.val, two.val];
          }
+       }
 
-         function finishDragEndpoint() {
-           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-             return continueTo(updateLine);
+       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);
+
+           function focusSearch(d3_event) {
+             var mode = context.mode() && context.mode().id;
+             if (mode !== 'browse') return;
+             d3_event.preventDefault();
+             search.node().focus();
            }
 
-           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);
+           function keydown(d3_event) {
+             if (d3_event.keyCode === 27) {
+               // escape
+               search.node().blur();
              }
+           }
 
-             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);
+           function keypress(d3_event) {
+             var q = search.property('value'),
+                 items = list.selectAll('.feature-list-item');
 
-             if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
-               continueTo(startDragEndpoint);
+             if (d3_event.keyCode === 13 && // ↩ Return
+             q.length && items.size()) {
+               click(d3_event, items.datum());
              }
-           });
-           context.on('enter.intro', function () {
-             continueTo(startDragMidpoint);
-           });
-
-           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);
+           function inputevent() {
+             _geocodeResults = undefined;
+             drawList();
            }
 
-           if (context.selectedIDs().indexOf(woodRoadID) === -1) {
-             context.enter(modeSelect(context, [woodRoadID]));
+           function clearSearch() {
+             search.property('value', '');
+             drawList();
            }
 
-           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 mapDrawn(e) {
+             if (e.full) {
+               drawList();
              }
+           }
 
-             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]));
-             }
-           });
+           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*)$/);
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+             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
 
-         function continueDragMidpoint() {
-           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-             return continueTo(updateLine);
-           }
 
-           var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-           var box = pad(woodRoadDragEndpoint, padding, context);
-           box.height += 400;
+             var idMatch = !locationMatch && q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);
 
-           var advance = function advance() {
-             context.history().checkpoint('doneUpdateLine');
-             continueTo(deleteLines);
-           };
+             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
+               });
+             }
 
-           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);
+             var allEntities = graph.entities;
+             var localResults = [];
+
+             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 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
+             localResults = localResults.sort(function byDistance(a, b) {
+               return a.distance - b.distance;
              });
-           });
+             result = result.concat(localResults);
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
-           }
-         }
+             (_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
+                 };
 
-         function deleteLines() {
-           context.history().reset('doneUpdateLine');
-           context.enter(modeBrowse(context));
+                 if (d.osm_type === 'way') {
+                   // for ways, add some fake closed nodes
+                   attrs.nodes = ['a', 'a']; // so that geometry area is possible
+                 }
 
-           if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-             return chapter.restart();
-           }
+                 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 msec = transitionTime(deleteLinesLoc, context.map().center());
+             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
+               });
+             }
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
+             return result;
            }
 
-           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;
+           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'));
 
-             var advance = function advance() {
-               continueTo(rightClickIntersection);
-             };
+             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'));
+             }
 
-             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)
+             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;
              });
-           }, msec + 100);
-
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
-
-         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
-               });
+             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'));
              });
-             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
+             label.append('span').attr('class', 'entity-type').text(function (d) {
+               return d.type;
              });
-             context.history().on('change.intro', function () {
-               timeout(function () {
-                 continueTo(deleteLines);
-               }, 300); // after any transition (e.g. if user deleted intersection)
+             label.append('span').attr('class', 'entity-name').text(function (d) {
+               return d.name;
              });
-           }, 600);
-
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
+             enter.style('opacity', 0).transition().style('opacity', 1);
+             items.order();
+             items.exit().remove();
            }
-         }
 
-         function splitIntersection() {
-           if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-             return continueTo(deleteLines);
+           function mouseover(d3_event, d) {
+             if (d.id === -1) return;
+             utilHighlightEntities([d.id], true, context);
            }
 
-           var node = selectMenuItem(context, 'split').node();
-
-           if (!node) {
-             return continueTo(rightClickIntersection);
+           function mouseout(d3_event, d) {
+             if (d.id === -1) return;
+             utilHighlightEntities([d.id], false, context);
            }
 
-           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 click(d3_event, d) {
+             d3_event.preventDefault();
 
-             if (!wasChanged && !node) {
-               return continueTo(rightClickIntersection);
+             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);
              }
-
-             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)
-           });
-
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
-
-         function retrySplit() {
-           context.enter(modeBrowse(context));
-           context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
-
-           var advance = function advance() {
-             continueTo(rightClickIntersection);
-           };
-
-           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
-             });
-           });
-
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
-           }
-         }
-
-         function didSplit() {
-           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-             return continueTo(rightClickIntersection);
            }
 
-           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
-               });
+           function geocoderSearch() {
+             services.geocoder.search(search.property('value'), function (err, resp) {
+               _geocodeResults = resp || [];
+               drawList();
              });
-           }, 600); // after initial reveal and curtain cut
-
-           context.on('enter.intro', function () {
-             var ids = context.selectedIDs();
-
-             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);
-             }
-           });
-
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
            }
          }
 
-         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;
+         return featureList;
+       }
 
-           if (hasWashington && hasTwelfth) {
-             return continueTo(multiRightClick);
-           } else if (!hasWashington && !hasTwelfth) {
-             return continueTo(didSplit);
-           }
+       function uiImproveOsmComments() {
+         var _qaItem;
 
-           context.map().centerZoomEase(twelfthAvenue, 18, 500);
-           timeout(function () {
-             var selected, other, padding, box;
+         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 (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;
-             }
+           services.improveOSM.getComments(_qaItem).then(function (d) {
+             if (!d.comments) return; // nothing to do here
 
-             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 {
-                 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;
+             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 (osm && d.username) {
+                 selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.username)).attr('target', '_blank');
                }
 
-               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
+               selection.text(function (d) {
+                 return d.username;
                });
              });
-             context.on('enter.intro', function () {
-               continueTo(multiSelect);
+             metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
+               return _t.html('note.status.commented', {
+                 when: localeDateString(d.timestamp)
+               });
              });
-             context.history().on('change.intro', function () {
-               if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-                 return continueTo(rightClickIntersection);
-               }
+             mainEnter.append('div').attr('class', 'comment-text').append('p').text(function (d) {
+               return d.text;
              });
-           }, 600);
+           })["catch"](function (err) {
+             console.log(err); // eslint-disable-line no-console
+           });
+         }
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             context.history().on('change.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 multiRightClick() {
-           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-             return continueTo(rightClickIntersection);
-           }
+         issueComments.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return issueComments;
+         };
 
-           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
-             });
+         return issueComments;
+       }
+
+       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"] = {
+             html: _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 improveOsmDetails(selection) {
+           var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
            });
-           context.ui().editMenu().on('toggled.intro', function (open) {
-             if (!open) return;
-             timeout(function () {
-               var ids = context.selectedIDs();
+           details.exit().remove();
+           var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description
 
-               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);
+           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 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
+
+             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 (!osmlayer.enabled()) {
+                 osmlayer.enabled(true);
+               }
+
+               context.map().centerZoom(_qaItem.loc, 20);
+
+               if (entity) {
+                 context.enter(modeSelect(context, [entityID]));
                } else {
-                 return continueTo(didSplit);
+                 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]));
+                 });
                }
-             }, 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);
-             }
-           });
+             }); // Replace with friendly name if possible
+             // (The entity may not yet be loaded into the graph)
 
-           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();
-           }
-         }
+             if (entity) {
+               var name = utilDisplayName(entity); // try to use common name
 
-         function multiDelete() {
-           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-             return continueTo(rightClickIntersection);
-           }
+               if (!name && !isObjectLink) {
+                 var preset = _mainPresetIndex.match(entity, context.graph());
+                 name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+               }
 
-           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 (name) {
+                 this.innerText = name;
+               }
              }
-           });
+           }); // Don't hide entities related to this error - #5880
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
+           context.features().forceVisible(relatedEntities);
+           context.map().pan([0, 0]); // trigger a redraw
          }
 
-         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);
-             }
-           });
+         improveOsmDetails.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return improveOsmDetails;
+         };
 
-           function continueTo(nextStep) {
-             nextStep();
-           }
+         return improveOsmDetails;
+       }
+
+       function uiImproveOsmHeader() {
+         var _qaItem;
+
+         function issueTitle(d) {
+           var issueKey = d.issueKey;
+           d.replacements = d.replacements || {};
+           d.replacements["default"] = {
+             html: _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 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');
+         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;
+
+             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);
          }
 
-         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);
-         };
-
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
+         improveOsmHeader.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return improveOsmHeader;
          };
 
-         return utilRebind(chapter, dispatch$1, 'on');
+         return improveOsmHeader;
        }
 
-       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'
-         };
-
-         function timeout(f, t) {
-           timeouts.push(window.setTimeout(f, t));
-         }
-
-         function eventCancel(d3_event) {
-           d3_event.stopPropagation();
-           d3_event.preventDefault();
-         }
+       function uiImproveOsmEditor(context) {
+         var dispatch = dispatch$8('change');
+         var qaDetails = uiImproveOsmDetails(context);
+         var qaComments = uiImproveOsmComments();
+         var qaHeader = uiImproveOsmHeader();
 
-         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);
-         }
+         var _qaItem;
 
-         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 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);
          }
 
-         function addHouse() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial');
-           _houseID = null;
-           var msec = transitionTime(house, context.map().center());
+         function improveOsmSaveSection(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+           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
 
-           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);
+           saveSection.exit().remove(); // enter
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+           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 startHouse() {
-           if (context.mode().id !== 'add-area') {
-             return continueTo(addHouse);
-           }
+           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 
-           _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
+           function changeInput() {
+             var input = select(this);
+             var val = input.property('value').trim();
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+             if (val === '') {
+               val = undefined;
+             } // store the unsaved comment with the issue itself
 
-         function continueHouse() {
-           if (context.mode().id !== 'draw-area') {
-             return continueTo(addHouse);
-           }
 
-           _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
+             _qaItem = _qaItem.update({
+               newComment: val
              });
-           });
-           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);
-               });
+             var qaService = services.improveOSM;
 
-               if (isMostlySquare(points)) {
-                 _houseID = way.id;
-                 return continueTo(chooseCategoryBuilding);
-               } else {
-                 return continueTo(retryHouse);
-               }
-             } else {
-               return chapter.restart();
+             if (qaService) {
+               qaService.replaceItem(_qaItem);
              }
-           });
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
+             saveSection.call(qaSaveButtons);
            }
          }
 
-         function retryHouse() {
-           var onClick = function onClick() {
-             continueTo(addHouse);
-           };
-
-           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 qaSaveButtons(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
-           }
-         }
+           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+             return d.status + d.id;
+           }); // exit
 
-         function chooseCategoryBuilding() {
-           if (!_houseID || !context.hasEntity(_houseID)) {
-             return addHouse();
-           }
+           buttonSection.exit().remove(); // enter
 
-           var ids = context.selectedIDs();
+           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
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-             context.enter(modeSelect(context, [_houseID]));
-           } // disallow scrolling
+           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
 
+             var qaService = services.improveOSM;
 
-           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 (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
 
-           context.on('enter.intro', function (mode) {
-             if (!_houseID || !context.hasEntity(_houseID)) {
-               return continueTo(addHouse);
+             var qaService = services.improveOSM;
+
+             if (qaService) {
+               d.newStatus = 'SOLVED';
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.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 ids = context.selectedIDs();
+             var qaService = services.improveOSM;
 
-             if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
-               return continueTo(chooseCategoryBuilding);
+             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.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 choosePresetHouse() {
-           if (!_houseID || !context.hasEntity(_houseID)) {
-             return addHouse();
-           }
+         improveOsmEditor.error = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return improveOsmEditor;
+         };
 
-           var ids = context.selectedIDs();
+         return utilRebind(improveOsmEditor, dispatch, 'on');
+       }
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-             context.enter(modeSelect(context, [_houseID]));
-           } // disallow scrolling
+       function uiPresetList(context) {
+         var dispatch = dispatch$8('cancel', 'choose');
 
+         var _entityIDs;
 
-           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..
+         var _currLoc;
 
-           context.on('enter.intro', function (mode) {
-             if (!_houseID || !context.hasEntity(_houseID)) {
-               return continueTo(addHouse);
-             }
+         var _currentPresets;
 
-             var ids = context.selectedIDs();
+         var _autofocus = false;
 
-             if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
-               return continueTo(chooseCategoryBuilding);
+         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)));
+
+           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);
              }
-           });
+           }
 
-           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 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
+
+               var buttons = list.selectAll('.preset-list-button');
+               if (!buttons.empty()) buttons.nodes()[0].focus();
+             }
            }
-         }
 
-         function closeEditorHouse() {
-           if (!_houseID || !context.hasEntity(_houseID)) {
-             return addHouse();
+           function keypress(d3_event) {
+             // enter
+             var value = search.property('value');
+
+             if (d3_event.keyCode === 13 && // ↩ Return
+             value.length) {
+               list.selectAll('.preset-list-item:first-child').each(function (d) {
+                 d.choose.call(this);
+               });
+             }
            }
 
-           var ids = context.selectedIDs();
+           function inputevent() {
+             var value = search.property('value');
+             list.classed('filtered', value.length);
+             var results, messageText;
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-             context.enter(modeSelect(context, [_houseID]));
+             if (value.length) {
+               results = presets.search(value, entityGeometries()[0], _currLoc);
+               messageText = _t.html('inspector.results', {
+                 n: results.collection.length,
+                 search: value
+               });
+             } else {
+               results = _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro(), _currLoc);
+               messageText = _t.html('inspector.choose');
+             }
+
+             list.call(drawList, results);
+             message.html(messageText);
            }
 
-           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);
+           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.on('exit.intro', null);
-             nextStep();
+           if (_autofocus) {
+             search.node().focus(); // Safari 14 doesn't always like to focus immediately,
+             // so try again on the next pass
+
+             setTimeout(function () {
+               search.node().focus();
+             }, 0);
            }
+
+           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);
          }
 
-         function rightClickHouse() {
-           if (!_houseID) return chapter.restart();
-           context.enter(modeBrowse(context));
-           context.history().reset('hasHouse');
-           var zoom = context.map().zoom();
+         function drawList(list, presets) {
+           presets = presets.matchAllGeometry(entityGeometries());
+           var collection = presets.collection.reduce(function (collection, preset) {
+             if (!preset) return collection;
 
-           if (zoom < 20) {
-             zoom = 20;
-           }
+             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));
+             }
 
-           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);
+             return collection;
+           }, []);
+           var items = list.selectAll('.preset-list-item').data(collection, function (d) {
+             return d.preset.id;
            });
-
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             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 clickSquare() {
-           if (!_houseID) return chapter.restart();
-           var entity = context.hasEntity(_houseID);
-           if (!entity) return continueTo(rightClickHouse);
-           var node = selectMenuItem(context, 'orthogonalize').node();
+         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
 
-           if (!node) {
-             return continueTo(rightClickHouse);
-           }
+           if (d3_event.keyCode === utilKeybinding.keyCodes['↓']) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation(); // the next item in the list at the same level
 
-           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 nextItem = select(item.node().nextElementSibling); // if there is no next item in this list
 
-             if (!wasChanged && !node) {
-               return continueTo(rightClickHouse);
+             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
+
+             } else if (select(this).classed('expanded')) {
+               // select the first subitem instead
+               nextItem = item.select('.subgrid .preset-list-item:first-child');
              }
 
-             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 (!nextItem.empty()) {
+               // focus on the next item
+               nextItem.select('.preset-list-button').node().focus();
+             } // arrow up, move focus to the previous, higher item
 
-             timeout(function () {
-               if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature', {
-                 n: 1
-               })) {
-                 continueTo(doneSquare);
-               } else {
-                 continueTo(retryClickSquare);
-               }
-             }, 500); // after transitioned actions
-           });
+           } else if (d3_event.keyCode === utilKeybinding.keyCodes['↑']) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation(); // the previous item in the list at the same level
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             context.map().on('move.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+             var previousItem = select(item.node().previousElementSibling); // if there is no previous item in this list
 
-         function retryClickSquare() {
-           context.enter(modeBrowse(context));
-           revealHouse(house, helpHtml('intro.buildings.retry_square'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               continueTo(rightClickHouse);
+             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) {
-             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 doneSquare() {
-           context.history().checkpoint('doneSquare');
-           revealHouse(house, helpHtml('intro.buildings.done_square'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               continueTo(addTank);
-             }
-           });
+           } 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
 
-           function continueTo(nextStep) {
-             nextStep();
+             if (!parentItem.empty()) {
+               parentItem.select('.preset-list-button').node().focus();
+             } // arrow right, choose this item
+
+           } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation();
+             item.datum().choose.call(select(this).node());
            }
          }
 
-         function addTank() {
-           context.enter(modeBrowse(context));
-           context.history().reset('doneSquare');
-           _tankID = null;
-           var msec = transitionTime(tank, context.map().center());
+         function CategoryItem(preset) {
+           var box,
+               sublist,
+               shown = false;
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+           function item(selection) {
+             var wrap = selection.append('div').attr('class', 'preset-list-button-wrap category');
 
-           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);
+             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();
+             }
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+             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
 
-         function startTank() {
-           if (context.mode().id !== 'add-area') {
-             return continueTo(addTank);
-           }
+                 if (!select(this).classed('expanded')) {
+                   // toggle expansion (expand the item)
+                   click.call(this, d3_event);
+                 } // left arrow, collapse the focused item
 
-           _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
-               });
+               } 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 {
+                 itemKeydown.call(this, d3_event);
+               }
              });
-             context.on('enter.intro', function (mode) {
-               if (mode.id !== 'draw-area') return chapter.restart();
-               continueTo(continueTank);
+             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;';
              });
-           }, 550); // after easing
-
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
+             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');
            }
-         }
 
-         function continueTank() {
-           if (context.mode().id !== 'draw-area') {
-             return continueTo(addTank);
-           }
+           item.choose = function () {
+             if (!box || !sublist) return;
 
-           _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);
+             if (shown) {
+               shown = false;
+               box.transition().duration(200).style('opacity', '0').style('max-height', '0px').style('padding-bottom', '0px');
              } else {
-               return continueTo(addTank);
+               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.on('enter.intro', null);
-             nextStep();
-           }
+           item.preset = preset;
+           return item;
          }
 
-         function searchPresetTank() {
-           if (!_tankID || !context.hasEntity(_tankID)) {
-             return addTank();
+         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);
            }
 
-           var ids = context.selectedIDs();
+           item.choose = function () {
+             if (select(this).classed('disabled')) return;
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
-             context.enter(modeSelect(context, [_tankID]));
-           } // disallow scrolling
+             if (!context.inIntro()) {
+               _mainPresetIndex.setMostRecent(preset, entityGeometries()[0]);
+             }
 
+             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);
+               }
 
-           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..
+               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();
+           };
 
-           context.on('enter.intro', function (mode) {
-             if (!_tankID || !context.hasEntity(_tankID)) {
-               return continueTo(addTank);
-             }
+           item.preset = preset;
+           item.reference = uiTagReference(preset.reference());
+           return item;
+         }
 
-             var ids = context.selectedIDs();
+         function updateForFeatureHiddenState() {
+           if (!_entityIDs.every(context.hasEntity)) return;
+           var geometries = entityGeometries();
+           var button = context.container().selectAll('.preset-list .preset-list-button'); // remove existing tooltips
 
-             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..
+           button.call(uiTooltip().destroyAny);
+           button.each(function (item, index) {
+             var hiddenPresetFeaturesId;
 
-               context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
+             for (var i in geometries) {
+               hiddenPresetFeaturesId = context.features().isHiddenPreset(item.preset, geometries[i]);
+               if (hiddenPresetFeaturesId) 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.buildings.search_tank', {
-                 preset: tankPreset.name()
-               }));
-               context.history().on('change.intro', null);
+             var isHiddenPreset = !context.inIntro() && !!hiddenPresetFeaturesId && (_currentPresets.length !== 1 || item.preset !== _currentPresets[0]);
+             select(this).classed('disabled', isHiddenPreset);
+
+             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'));
              }
            });
+         }
 
-           function checkPresetSearch() {
-             var first = context.container().select('.preset-list-item:first-child');
+         presetList.autofocus = function (val) {
+           if (!arguments.length) return _autofocus;
+           _autofocus = val;
+           return presetList;
+         };
 
-             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);
-               });
-             }
-           }
+         presetList.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           _currLoc = null;
 
-           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();
-           }
-         }
+           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());
 
-         function closeEditorTank() {
-           if (!_tankID || !context.hasEntity(_tankID)) {
-             return addTank();
-           }
+             _currLoc = extent.center(); // match presets
 
-           var ids = context.selectedIDs();
+             var presets = _entityIDs.map(function (entityID) {
+               return _mainPresetIndex.match(context.entity(entityID), context.graph());
+             });
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
-             context.enter(modeSelect(context, [_tankID]));
+             presetList.presets(presets);
            }
 
-           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);
+           return presetList;
+         };
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
-           }
-         }
+         presetList.presets = function (val) {
+           if (!arguments.length) return _currentPresets;
+           _currentPresets = val;
+           return presetList;
+         };
 
-         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);
+         function entityGeometries() {
+           var counts = {};
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+           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 clickCircle() {
-           if (!_tankID) return chapter.restart();
-           var entity = context.hasEntity(_tankID);
-           if (!entity) return continueTo(rightClickTank);
-           var node = selectMenuItem(context, 'circularize').node();
+             if (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
+               geometry = 'point';
+             }
 
-           if (!node) {
-             return continueTo(rightClickTank);
+             if (!counts[geometry]) counts[geometry] = 0;
+             counts[geometry] += 1;
            }
 
-           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);
-             }
+           return Object.keys(counts).sort(function (geom1, geom2) {
+             return counts[geom2] - counts[geom1];
            });
-           context.map().on('move.intro', function () {
-             var node = selectMenuItem(context, 'circularize').node();
+         }
 
-             if (!wasChanged && !node) {
-               return continueTo(rightClickTank);
-             }
+         return utilRebind(presetList, dispatch, 'on');
+       }
 
-             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.
+       function uiViewOnOSM(context) {
+         var _what; // an osmEntity or osmNote
 
-             timeout(function () {
-               if (context.history().undoAnnotation() === _t('operations.circularize.annotation.feature', {
-                 n: 1
-               })) {
-                 continueTo(play);
-               } else {
-                 continueTo(retryClickCircle);
-               }
-             }, 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();
+         function viewOnOSM(selection) {
+           var url;
+
+           if (_what instanceof osmEntity) {
+             url = context.connection().entityURL(_what);
+           } else if (_what instanceof osmNote) {
+             url = context.connection().noteURL(_what);
            }
-         }
 
-         function retryClickCircle() {
-           context.enter(modeBrowse(context));
-           revealTank(tank, helpHtml('intro.buildings.retry_circle'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               continueTo(rightClickTank);
-             }
-           });
+           var data = !_what || _what.isNew() ? [] : [_what];
+           var link = selection.selectAll('.view-on-osm').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-           function continueTo(nextStep) {
-             nextStep();
-           }
-         }
+           link.exit().remove(); // enter
 
-         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');
-             }
-           });
+           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'));
          }
 
-         chapter.enter = function () {
-           addHouse();
+         viewOnOSM.what = function (_) {
+           if (!arguments.length) return _what;
+           _what = _;
+           return viewOnOSM;
          };
 
-         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);
-         };
+         return viewOnOSM;
+       }
 
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
-         };
+       function uiInspector(context) {
+         var presetList = uiPresetList(context);
+         var entityEditor = uiEntityEditor(context);
+         var wrap = select(null),
+             presetPane = select(null),
+             editorPane = select(null);
+         var _state = 'select';
 
-         return utilRebind(chapter, dispatch$1, 'on');
-       }
+         var _entityIDs;
 
-       function uiIntroStartEditing(context, reveal) {
-         var dispatch$1 = dispatch('done', 'startEditing');
-         var modalSelection = select(null);
-         var chapter = {
-           title: 'intro.startediting.title'
-         };
+         var _newFeature = false;
 
-         function showHelp() {
-           reveal('.map-control.help-control', helpHtml('intro.startediting.help'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               shortcuts();
-             }
+         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 shortcuts() {
-           reveal('.map-control.help-control', helpHtml('intro.startediting.shortcuts'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               showSave();
-             }
-           });
-         }
+           function shouldDefaultToPresetList() {
+             // always show the inspector on hover
+             if (_state !== 'select') return false; // can only change preset on single selection
 
-         function showSave() {
-           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
+             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
 
-           reveal('.top-toolbar button.save', helpHtml('intro.startediting.save'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               showStart();
-             }
-           });
-         }
+             if (entity.hasNonGeometryTags()) return false; // prompt to select preset if feature is new and untagged
 
-         function showStart() {
-           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
+             if (_newFeature) return true; // all existing features except vertices should default to inspector
 
-           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').html(_t.html('intro.startediting.start'));
-           dispatch$1.call('startEditing');
-         }
+             if (entity.geometry(context.graph()) !== 'vertex') return false; // show vertex relations if any
 
-         chapter.enter = function () {
-           showHelp();
-         };
+             if (context.graph().parentRelations(entity).length) return false; // show vertex issues if there are any
 
-         chapter.exit = function () {
-           modalSelection.remove();
-           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
-         };
+             if (context.validator().getEntityIssues(entityID).length) return false; // show turn retriction editor for junction vertices
 
-         return utilRebind(chapter, dispatch$1, 'on');
-       }
+             if (entity.isHighwayIntersection(context.graph())) return false; // otherwise show preset list for uninteresting vertices
 
-       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 = {};
+             return true;
+           }
 
-         var _currChapter;
+           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 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]));
-               }
-             }
+           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])));
+         }
 
-             selection.call(startIntro);
-           })["catch"](function () {
-             /* ignore */
+         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);
            });
-         }
 
-         function startIntro(selection) {
-           context.enter(modeBrowse(context)); // Save current map state
+           if (presets) {
+             presetList.presets(presets);
+           }
 
-           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)`)
+           presetPane.call(presetList.autofocus(true));
+         };
 
-           context.ui().sidebar.expand();
-           context.container().selectAll('button.sidebar-toggle').classed('disabled', true); // Block saving
+         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);
+             });
 
-           context.inIntro(true); // Load semi-real data used in intro
+             if (preset) {
+               entityEditor.presets([preset]);
+             }
 
-           if (osm) {
-             osm.toggle(false).reset();
+             editorPane.call(entityEditor);
            }
+         };
 
-           context.history().reset();
-           context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
-           context.history().checkpoint('initial'); // Setup imagery
+         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
 
-           var imagery = context.background().findSource(INTRO_IMAGERY);
+           context.container().selectAll('.field-help-body').remove();
+           return inspector;
+         };
 
-           if (imagery) {
-             context.background().baseLayerSource(imagery);
-           } else {
-             context.background().bing();
-           }
+         inspector.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return inspector;
+         };
 
-           overlays.forEach(function (d) {
-             return context.background().toggleOverlayLayer(d);
-           }); // Setup data layers (only OSM)
+         inspector.newFeature = function (val) {
+           if (!arguments.length) return _newFeature;
+           _newFeature = val;
+           return inspector;
+         };
 
-           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 inspector;
+       }
 
-           corePreferences('walkthrough_started', 'yes'); // Restore previous walkthrough progress..
+       function uiKeepRightDetails(context) {
+         var _qaItem;
 
-           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);
+         function issueDetail(d) {
+           var itemType = d.itemType,
+               parentIssueType = d.parentIssueType;
+           var unknown = {
+             html: _t.html('inspector.unknown')
+           };
+           var replacements = d.replacements || {};
+           replacements["default"] = unknown; // special key `default` works as a fallback string
 
-               if (i < chapterFlow.length - 1) {
-                 var next = chapterFlow[i + 1];
-                 context.container().select("button.chapter-".concat(next)).classed('next', true);
-               } // Store walkthrough progress..
+           var detail = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".description"), replacements);
 
+           if (detail === unknown.html) {
+             detail = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".description"), replacements);
+           }
 
-               progress.push(chapter);
-               corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
-             });
-             return s;
+           return detail;
+         }
+
+         function keepRightDetails(selection) {
+           var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
            });
-           chapters[chapters.length - 1].on('startEditing', function () {
-             // Store walkthrough progress..
-             progress.push('startEditing');
-             corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';')); // Store if walkthrough is completed..
+           details.exit().remove();
+           var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description
 
-             var incomplete = utilArrayDifference(chapterFlow, progress);
+           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 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 (!incomplete.length) {
-               corePreferences('walkthrough_completed', 'yes');
-             }
+             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');
 
-             curtain.remove();
-             navwrap.remove();
-             context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
-             context.container().selectAll('button.sidebar-toggle').classed('disabled', false);
+               if (!osmlayer.enabled()) {
+                 osmlayer.enabled(true);
+               }
 
-             if (osm) {
-               osm.toggle(true).reset().caches(caches);
-             }
+               context.map().centerZoomEase(_qaItem.loc, 20);
 
-             context.history().reset().merge(Object.values(baseEntities));
-             context.background().baseLayerSource(background);
-             overlays.forEach(function (d) {
-               return context.background().toggleOverlayLayer(d);
-             });
+               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)
 
-             if (history) {
-               context.history().fromJSON(history, false);
-             }
+             if (entity) {
+               var name = utilDisplayName(entity); // try to use common name
 
-             context.map().centerZoom(center, zoom);
-             window.location.replace(hash);
-             context.inIntro(false);
-           });
-           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]);
+               if (!name && !isObjectLink) {
+                 var preset = _mainPresetIndex.match(entity, context.graph());
+                 name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+               }
 
-           function enterChapter(d3_event, newChapter) {
-             if (_currChapter) {
-               _currChapter.exit();
+               if (name) {
+                 this.innerText = name;
+               }
              }
+           }); // Don't hide entities related to this issue - #5880
 
-             context.enter(modeBrowse(context));
-             _currChapter = newChapter;
-
-             _currChapter.enter();
-
-             buttons.classed('next', false).classed('active', function (d) {
-               return d.title === _currChapter.title;
-             });
-           }
+           context.features().forceVisible(relatedEntities);
+           context.map().pan([0, 0]); // trigger a redraw
          }
 
-         return intro;
-       }
-
-       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'
+         keepRightDetails.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return keepRightDetails;
          };
 
-         function update(selection) {
-           var shownItems = [];
-           var liveIssues = context.validator().getIssues({
-             what: corePreferences('validate-what') || 'edited',
-             where: corePreferences('validate-where') || 'all'
-           });
+         return keepRightDetails;
+       }
 
-           if (liveIssues.length) {
-             warningsItem.count = liveIssues.length;
-             shownItems.push(warningsItem);
-           }
+       function uiKeepRightHeader() {
+         var _qaItem;
 
-           if (corePreferences('validate-what') === 'all') {
-             var resolvedIssues = context.validator().getResolvedIssues();
+         function issueTitle(d) {
+           var itemType = d.itemType,
+               parentIssueType = d.parentIssueType;
+           var unknown = _t.html('inspector.unknown');
+           var replacements = d.replacements || {};
+           replacements["default"] = {
+             html: unknown
+           }; // special key `default` works as a fallback string
 
-             if (resolvedIssues.length) {
-               resolvedItem.count = resolvedIssues.length;
-               shownItems.push(resolvedItem);
-             }
-           }
+           var title = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".title"), replacements);
 
-           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
+           if (title !== unknown) {
+             return _t.apply("QA.keepRight.errorTypes.".concat(itemType, ".title"), replacements);
+           } else {
+             return _t.apply("QA.keepRight.errorTypes.".concat(parentIssueType, ".title"), replacements);
+           }
+         }
 
-               context.ui().togglePanes(context.container().select('.map-panes .issues-pane'));
-             });
-             chipSelection.call(svgIcon('#' + d.iconID));
+         function keepRightHeader(selection) {
+           var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
            });
-           enter.append('span').attr('class', 'count');
-           enter.merge(chips).selectAll('span.count').html(function (d) {
-             return d.count.toString();
+           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);
          }
 
-         return function (selection) {
-           update(selection);
-           context.validator().on('validated.infobox', function () {
-             update(selection);
-           });
+         keepRightHeader.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return keepRightHeader;
          };
+
+         return keepRightHeader;
        }
 
-       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)
+       function uiViewOnKeepRight() {
+         var _qaItem;
 
-           var _dMini; // dimensions of minimap
+         function viewOnKeepRight(selection) {
+           var url;
 
+           if (services.keepRight && _qaItem instanceof QAItem) {
+             url = services.keepRight.issueURL(_qaItem);
+           }
 
-           var _cMini; // center pixel of minimap
+           var link = selection.selectAll('.view-on-keepRight').data(url ? [url] : []); // exit
 
+           link.exit().remove(); // enter
 
-           var _tStart; // transform at start of gesture
+           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'));
+         }
 
+         viewOnKeepRight.what = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return viewOnKeepRight;
+         };
 
-           var _tCurr; // transform at most recent event
+         return viewOnKeepRight;
+       }
 
+       function uiKeepRightEditor(context) {
+         var dispatch = dispatch$8('change');
+         var qaDetails = uiKeepRightDetails(context);
+         var qaHeader = uiKeepRightHeader();
 
-           var _timeoutID;
+         var _qaItem;
 
-           function zoomStarted() {
-             if (_skipEvents) return;
-             _tStart = _tCurr = projection.transform();
-             _gesture = null;
-           }
+         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 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 keepRightSaveSection(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-             if (!isZooming && !isPanning) {
-               return; // no change
-             } // lock in either zooming or panning, don't allow both in minimap.
+           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
 
+           saveSection.exit().remove(); // enter
 
-             if (!_gesture) {
-               _gesture = isZooming ? 'zoom' : 'pan';
-             }
+           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
 
-             var tMini = projection.transform();
-             var tX, tY, scale;
+           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 
-             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 changeInput() {
+             var input = select(this);
+             var val = input.property('value').trim();
 
-             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();
-           }
+             if (val === _qaItem.comment) {
+               val = undefined;
+             } // store the unsaved comment with the issue itself
 
-           function zoomEnded() {
-             if (_skipEvents) return;
-             if (_gesture !== 'pan') return;
-             updateProjection();
-             _gesture = null;
-             context.map().center(projection.invert(_cMini)); // recenter main map..
-           }
 
-           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();
+             _qaItem = _qaItem.update({
+               newComment: val
+             });
+             var qaService = services.keepRight;
 
-             if (_isTransformed) {
-               utilSetTransform(tiles, 0, 0);
-               utilSetTransform(viewport, 0, 0);
-               _isTransformed = false;
+             if (qaService) {
+               qaService.replaceItem(_qaItem); // update keepright cache
              }
 
-             zoom.scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
-             _skipEvents = true;
-             wrap.call(zoom.transform, _tCurr);
-             _skipEvents = false;
+             saveSection.call(qaSaveButtons);
            }
+         }
 
-           function redraw() {
-             clearTimeout(_timeoutID);
-             if (_isHidden) return;
-             updateProjection();
-             var zMini = geoScaleToZoom(projection.scale()); // setup tile container
+         function qaSaveButtons(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-             tiles = wrap.selectAll('.map-in-map-tiles').data([0]);
-             tiles = tiles.enter().append('div').attr('class', 'map-in-map-tiles').merge(tiles); // redraw background
+           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+             return d.status + d.id;
+           }); // exit
 
-             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
+           buttonSection.exit().remove(); // enter
 
-             var overlaySources = context.background().overlayLayerSources();
-             var activeOverlayLayers = [];
+           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
 
-             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));
-               }
-             }
+           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 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
+             var qaService = services.keepRight;
 
-             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 (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 queueRedraw() {
-             clearTimeout(_timeoutID);
-             _timeoutID = setTimeout(function () {
-               redraw();
-             }, 750);
-           }
+             var qaService = services.keepRight;
 
-           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 (qaService) {
+               d.newStatus = 'ignore_t'; // ignore temporarily (item fixed)
 
-             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();
+               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
 
-           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..
+             var qaService = services.keepRight;
 
-           _dMini = [200, 150]; //utilGetDimensions(wrap);
+             if (qaService) {
+               d.newStatus = 'ignore'; // ignore permanently (false positive)
 
-           _cMini = geoVecScale(_dMini, 0.5);
-           context.map().on('drawn.map-in-map', function (drawn) {
-             if (drawn.full === true) {
-               redraw();
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
              }
            });
-           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').html(_t.html('zoom_in_edit'));
+         } // NOTE: Don't change method name until UI v3 is merged
 
-           function disableTooHigh() {
-             var canEdit = context.map().zoom() >= context.minEditableZoom();
-             div.style('display', canEdit ? 'none' : 'block');
-           }
 
-           context.map().on('move.notice', debounce(disableTooHigh, 500));
-           disableTooHigh();
+         keepRightEditor.error = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return keepRightEditor;
          };
-       }
-
-       function uiPhotoviewer(context) {
-         var dispatch$1 = dispatch('resize');
-
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-         function photoviewer(selection) {
-           selection.append('button').attr('class', 'thumb-hide').on('click', function () {
-             if (services.streetside) {
-               services.streetside.hideViewer(context);
-             }
+         return utilRebind(keepRightEditor, dispatch, 'on');
+       }
 
-             if (services.mapillary) {
-               services.mapillary.hideViewer(context);
-             }
+       function uiLasso(context) {
+         var group, polygon;
+         lasso.coordinates = [];
 
-             if (services.openstreetcam) {
-               services.openstreetcam.hideViewer(context);
-             }
-           }).append('div').call(svgIcon('#iD-icon-close'));
+         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));
+         }
 
-           function preventDefault(d3_event) {
-             d3_event.preventDefault();
+         function draw() {
+           if (polygon) {
+             polygon.data([lasso.coordinates]).attr('d', function (d) {
+               return 'M' + d.join(' L') + ' Z';
+             });
            }
+         }
 
-           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
-           }));
+         lasso.extent = function () {
+           return lasso.coordinates.reduce(function (extent, point) {
+             return extent.extend(geoExtent(point));
+           }, geoExtent());
+         };
 
-           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;
+         lasso.p = function (_) {
+           if (!arguments.length) return lasso;
+           lasso.coordinates.push(_);
+           draw();
+           return lasso;
+         };
 
-             function startResize(d3_event) {
-               if (pointerId !== (d3_event.pointerId || 'mouse')) return;
-               d3_event.preventDefault();
-               d3_event.stopPropagation();
-               var mapSize = context.map().dimensions();
+         lasso.close = function () {
+           if (group) {
+             group.call(uiToggle(false, function () {
+               select(this).remove();
+             }));
+           }
 
-               if (resizeOnX) {
-                 var maxWidth = mapSize[0];
-                 var newWidth = clamp(startWidth + d3_event.clientX - startX, minWidth, maxWidth);
-                 target.style('width', newWidth + 'px');
-               }
+           context.container().classed('lasso', false);
+         };
 
-               if (resizeOnY) {
-                 var maxHeight = mapSize[1] - 90; // preserve space at top/bottom of map
+         return lasso;
+       }
 
-                 var newHeight = clamp(startHeight + startY - d3_event.clientY, minHeight, maxHeight);
-                 target.style('height', newHeight + 'px');
-               }
+       function uiNoteComments() {
+         var _note;
 
-               dispatch.call(eventName, target, utilGetDimensions(target, true));
-             }
+         function noteComments(selection) {
+           if (_note.isNew()) return; // don't draw .comments-container
 
-             function clamp(num, min, max) {
-               return Math.max(min, Math.min(num, max));
-             }
+           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;
 
-             function stopResize(d3_event) {
-               if (pointerId !== (d3_event.pointerId || 'mouse')) return;
-               d3_event.preventDefault();
-               d3_event.stopPropagation(); // remove all the listeners we added
+             if (osm && d.user) {
+               selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.user)).attr('target', '_blank');
+             }
 
-               select(window).on('.' + eventName, null);
+             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);
+         }
 
-             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);
+         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
 
-               if (_pointerPrefix === 'pointer') {
-                 select(window).on('pointercancel.' + eventName, stopResize, false);
-               }
-             };
-           }
+           _note.comments.forEach(function (d) {
+             if (d.uid) uids[d.uid] = true;
+           });
+
+           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);
+             });
+           });
          }
 
-         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)
+         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 photoDimensions = utilGetDimensions(photoviewer, true);
+           var d = new Date(s);
+           if (isNaN(d.getTime())) return null;
+           return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+         }
 
-           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);
-           }
+         noteComments.note = function (val) {
+           if (!arguments.length) return _note;
+           _note = val;
+           return noteComments;
          };
 
-         return utilRebind(photoviewer, dispatch$1, 'on');
+         return noteComments;
        }
 
-       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();
+       function uiNoteHeader() {
+         var _note;
+
+         function noteHeader(selection) {
+           var header = selection.selectAll('.note-header').data(_note ? [_note] : [], function (d) {
+             return d.status + d.id;
            });
-           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();
+           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;
            });
-           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 uiScale(context) {
-         var projection = context.projection,
-             isImperial = !_mainLocalizer.usesMetric(),
-             maxLength = 180,
-             tickHeight = 8;
+           iconEnter.append('div').attr('class', 'preset-icon-28').call(svgIcon('#iD-icon-note', 'note-fill'));
+           iconEnter.each(function (d) {
+             var statusIcon;
 
-         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 (d.id < 0) {
+               statusIcon = '#iD-icon-plus';
+             } else if (d.status === 'open') {
+               statusIcon = '#iD-icon-close';
+             } else {
+               statusIcon = '#iD-icon-apply';
+             }
 
-           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
+             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') : '');
+           });
+         }
 
-           for (i = 0; i < buckets.length; i++) {
-             val = buckets[i];
+         noteHeader.note = function (val) {
+           if (!arguments.length) return _note;
+           _note = val;
+           return noteHeader;
+         };
 
-             if (dist >= val) {
-               scale.dist = Math.floor(dist / val) * val;
-               break;
-             } else {
-               scale.dist = +dist.toFixed(2);
-             }
-           }
+         return noteHeader;
+       }
 
-           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 uiNoteReport() {
+         var _note;
 
-         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 noteReport(selection) {
+           var url;
 
-         return function (selection) {
-           function switchUnits() {
-             isImperial = !isImperial;
-             selection.call(update);
+           if (services.osm && _note instanceof osmNote && !_note.isNew()) {
+             url = services.osm.noteReportURL(_note);
            }
 
-           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 link = selection.selectAll('.note-report').data(url ? [url] : []); // exit
 
-       function uiShortcuts(context) {
-         var detected = utilDetect();
-         var _activeTab = 0;
+           link.exit().remove(); // enter
 
-         var _modalSelection;
+           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'));
+         }
 
-         var _selection = select(null);
+         noteReport.note = function (val) {
+           if (!arguments.length) return _note;
+           _note = val;
+           return noteReport;
+         };
 
-         var _dataShortcuts;
+         return noteReport;
+       }
 
-         function shortcutsModal(_modalSelection) {
-           _modalSelection.select('.modal').classed('modal-shortcuts', true);
+       function uiNoteEditor(context) {
+         var dispatch = dispatch$8('change');
+         var noteComments = uiNoteComments();
+         var noteHeader = uiNoteHeader(); // var formFields = uiFormFields(context);
 
-           var content = _modalSelection.select('.content');
+         var _note;
 
-           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 */
-           });
-         }
+         var _newNote; // var _fieldsArr;
 
-         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();
 
-             var i = _dataShortcuts.indexOf(d);
+         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
 
-             _activeTab = i;
-             render(selection);
-           });
-           tabsEnter.append('span').html(function (d) {
-             return _t.html(d.text);
-           }); // Update
+           var osm = services.osm;
 
-           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;
-             }
-           }).enter().each(function () {
-             var selection = select(this);
-             selection.append('kbd').attr('class', 'modifier').html(function (d) {
-               return uiCmd.display(d);
+           if (osm) {
+             osm.on('change.note-save', function () {
+               selection.call(noteEditor);
              });
-             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
+         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
 
-             arr = arr.map(function (s) {
-               return uiCmd.display(s.indexOf('.') !== -1 ? _t(s) : s);
-             });
-             return utilArrayUniq(arr).map(function (s) {
-               return {
-                 shortcut: s,
-                 separator: d.separator,
-                 suffix: d.suffix
-               };
-             });
-           }).enter().each(function (d, i, nodes) {
-             var selection = select(this);
-             var click = d.shortcut.toLowerCase().match(/(.*).click/);
+           noteSave.exit().remove(); // enter
 
-             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;
-               });
-             }
+           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);
+           // }
 
-             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);
-             });
+           noteSaveEnter.append('h4').attr('class', '.note-save-header').html(function () {
+             return _note.isNew() ? _t.html('note.newDescription') : _t.html('note.newComment');
            });
-           shortcutRows.append('td').attr('class', 'shortcut-desc').html(function (d) {
-             return d.text ? _t.html(d.text) : "\xA0";
-           }); // Update
+           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);
 
-           wrapper.selectAll('.shortcut-tab').style('display', function (d, i) {
-             return i === _activeTab ? 'flex' : 'none';
-           });
-         }
+           if (!commentTextarea.empty() && _newNote) {
+             // autofocus the comment field for new notes
+             commentTextarea.node().focus();
+           } // update
 
-         return function (selection, show) {
-           _selection = selection;
 
-           if (show) {
-             _modalSelection = uiModal(selection);
+           noteSave = noteSaveEnter.merge(noteSave).call(userDetails).call(noteSaveButtons); // fast submit if user presses cmd+enter
 
-             _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();
+           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
 
-                   _modalSelection = null;
-                 }
+             window.setTimeout(function () {
+               if (_note.isNew()) {
+                 noteSave.selectAll('.save-button').node().focus();
+                 clickSave();
                } else {
-                 _modalSelection = uiModal(_selection);
-
-                 _modalSelection.call(shortcutsModal);
+                 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 (osm) {
+               osm.replaceNote(_note); // update note cache
+             }
+
+             noteSave.call(noteSaveButtons);
            }
-         };
-       }
+         }
 
-       var pair_1 = pair;
+         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
 
-       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
+           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();
+           });
+           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');
+             }
 
-         var matched = m[0]; // extract dimension.. m[1] = leading, m[5] = trailing
+             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()
+               }
+             }));
+           });
+         }
 
-         var dim;
+         function noteSaveButtons(selection) {
+           var osm = services.osm;
+           var hasAuth = osm && osm.authenticated();
 
-         if (m[1] && m[5]) {
-           // if matched both..
-           dim = m[1]; // keep leading
+           var isSelected = _note && _note.id === context.selectedNoteID();
 
-           matched = matched.slice(0, -1); // remove trailing dimension from match
-         } else {
-           dim = m[1] || m[5];
-         } // if unrecognized dimension
+           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_note] : [], function (d) {
+             return d.status + d.id;
+           }); // exit
 
+           buttonSection.exit().remove(); // enter
 
-         if (dim && dims.indexOf(dim) === -1) return null; // extract DMS
+           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
 
-         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)
-         };
-       }
+           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
 
-       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;
 
-         if (one.dim) {
-           return swapdim(one.val, two.val, one.dim);
-         } else {
-           return [one.val, two.val];
-         }
-       }
+           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 swapdim(a, b, dim) {
-         if (dim === 'N' || dim === 'S') return [a, b];
-         if (dim === 'W' || dim === 'E') return [b, a];
-       }
+           function isSaveDisabled(d) {
+             return hasAuth && d.status === 'open' && d.newComment ? null : true;
+           }
+         }
 
-       function uiFeatureList(context) {
-         var _geocodeResults;
+         function clickCancel(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button - #4641
 
-         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 osm = services.osm;
 
-           function focusSearch(d3_event) {
-             var mode = context.mode() && context.mode().id;
-             if (mode !== 'browse') return;
-             d3_event.preventDefault();
-             search.node().focus();
+           if (osm) {
+             osm.removeNote(d);
            }
 
-           function keydown(d3_event) {
-             if (d3_event.keyCode === 27) {
-               // escape
-               search.node().blur();
-             }
-           }
+           context.enter(modeBrowse(context));
+           dispatch.call('change');
+         }
 
-           function keypress(d3_event) {
-             var q = search.property('value'),
-                 items = list.selectAll('.feature-list-item');
+         function clickSave(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button - #4641
 
-             if (d3_event.keyCode === 13 && // ↩ Return
-             q.length && items.size()) {
-               click(items.datum());
-             }
-           }
+           var osm = services.osm;
 
-           function inputevent() {
-             _geocodeResults = undefined;
-             drawList();
+           if (osm) {
+             osm.postNoteCreate(d, function (err, note) {
+               dispatch.call('change', note);
+             });
            }
+         }
 
-           function clearSearch() {
-             search.property('value', '');
-             drawList();
-           }
+         function clickStatus(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button - #4641
 
-           function mapDrawn(e) {
-             if (e.full) {
-               drawList();
-             }
-           }
+           var osm = services.osm;
 
-           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 (osm) {
+             var setStatus = d.status === 'open' ? 'closed' : 'open';
+             osm.postNoteUpdate(d, setStatus, function (err, note) {
+               dispatch.call('change', note);
+             });
+           }
+         }
 
-             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
+         function clickComment(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button - #4641
 
+           var osm = services.osm;
 
-             var idMatch = !locationMatch && q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);
+           if (osm) {
+             osm.postNoteUpdate(d, d.status, function (err, note) {
+               dispatch.call('change', note);
+             });
+           }
+         }
 
-             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
-               });
-             }
+         noteEditor.note = function (val) {
+           if (!arguments.length) return _note;
+           _note = val;
+           return noteEditor;
+         };
 
-             var allEntities = graph.entities;
-             var localResults = [];
+         noteEditor.newNote = function (val) {
+           if (!arguments.length) return _newNote;
+           _newNote = val;
+           return noteEditor;
+         };
 
-             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;
-             }
+         return utilRebind(noteEditor, dispatch, 'on');
+       }
 
-             localResults = localResults.sort(function byDistance(a, b) {
-               return a.distance - b.distance;
-             });
-             result = result.concat(localResults);
+       function uiSourceSwitch(context) {
+         var keys;
 
-             (_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
-                 };
+         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
 
-                 if (d.osm_type === 'way') {
-                   // for ways, add some fake closed nodes
-                   attrs.nodes = ['a', 'a']; // so that geometry area is possible
-                 }
+           context.flush(); // remove stored data
 
-                 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])])
-                 });
-               }
-             });
+           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)
+         }
 
-             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
-               });
-             }
+         var sourceSwitch = function sourceSwitch(selection) {
+           selection.append('a').attr('href', '#').call(_t.append('source_switch.live')).attr('class', 'live chip').on('click', click);
+         };
 
-             return result;
-           }
+         sourceSwitch.keys = function (_) {
+           if (!arguments.length) return keys;
+           keys = _;
+           return sourceSwitch;
+         };
 
-           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'));
+         return sourceSwitch;
+       }
 
-             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'));
-             }
+       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);
 
-             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;
+           if (osm) {
+             osm.on('loading.spinner', function () {
+               img.transition().style('opacity', 1);
+             }).on('loaded.spinner', function () {
+               img.transition().style('opacity', 0);
              });
-             enter.style('opacity', 0).transition().style('opacity', 1);
-             items.order();
-             items.exit().remove();
-           }
-
-           function mouseover(d3_event, d) {
-             if (d.id === -1) return;
-             utilHighlightEntities([d.id], true, context);
            }
+         };
+       }
 
-           function mouseout(d3_event, d) {
-             if (d.id === -1) return;
-             utilHighlightEntities([d.id], false, context);
-           }
+       function uiSectionPrivacy(context) {
+         var section = uiSection('preferences-third-party', context).label(_t.html('preferences.privacy.title')).disclosureContent(renderDisclosureContent);
 
-           function click(d3_event, d) {
+         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
 
-             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);
-             }
-           }
+           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
 
-           function geocoderSearch() {
-             services.geocoder.search(search.property('value'), function (err, resp) {
-               _geocodeResults = resp || [];
-               drawList();
-             });
-           }
+           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'));
          }
 
-         return featureList;
+         corePreferences.onChange('preferences.privacy.thirdpartyicons', section.reRender);
+         return section;
        }
 
-       var getOwnPropertyDescriptor$4 = objectGetOwnPropertyDescriptor.f;
+       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');
+
+           if (sawPrivacyVersion !== context.privacyVersion) {
+             updateMessage = _t('splash.privacy_update');
+             showSplash = true;
+           }
+
+           if (!showSplash) return;
+           corePreferences('sawSplash', true);
+           corePreferences('sawPrivacyVersion', context.privacyVersion); // fetch intro graph data now, while user is looking at the splash screen
+
+           _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');
+         };
+       }
 
+       function uiStatus(context) {
+         var osm = context.connection();
+         return function (selection) {
+           if (!osm) return;
 
+           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.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
 
+                   osm.reloadApiStatus();
+                 }, 2000); // eslint-disable-next-line no-warning-comments
+                 // TODO: nice messages for different error types
 
-       var nativeStartsWith = ''.startsWith;
-       var min$9 = 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$4(String.prototype, 'startsWith');
-         return descriptor && !descriptor.writable;
-       }();
+                 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'));
+             }
 
-       // `String.prototype.startsWith` method
-       // https://tc39.es/ecma262/#sec-string.prototype.startswith
-       _export({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG && !CORRECT_IS_REGEXP_LOGIC }, {
-         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;
-         }
-       });
+             selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
+           }
 
-       function uiSectionEntityIssues(context) {
-         var _entityIDs = [];
-         var _issues = [];
+           osm.on('apiStatusChange.uiStatus', update);
+           context.history().on('storage_error', function () {
+             selection.selectAll('span.local-storage-full').remove();
+             selection.append('span').attr('class', 'local-storage-full').call(_t.append('osm_api_status.message.local_storage_full'));
+             selection.classed('error', true);
+           }); // reload the status periodically regardless of other factors
 
-         var _activeIssueID;
+           window.setInterval(function () {
+             osm.reloadApiStatus();
+           }, 90000); // load the initial status in case no OSM data was loaded yet
 
-         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);
-         });
+           osm.reloadApiStatus();
+         };
+       }
 
-         function reloadIssues() {
-           _issues = context.validator().getSharedEntityIssues(_entityIDs, {
-             includeDisabledRules: true
-           });
-         }
+       // for punction see https://stackoverflow.com/a/21224179
 
-         function makeActiveIssue(issueID) {
-           _activeIssueID = issueID;
-           section.selection().selectAll('.issue-container').classed('active', function (d) {
-             return d.id === _activeIssueID;
-           });
-         }
+       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 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
+       // `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
+       //   }
+       //
 
-           containers.exit().remove(); // Enter
+       function resolveStrings(item, defaults, localizerFn) {
+         var itemStrings = Object.assign({}, item.strings); // shallow clone
 
-           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
+         var defaultStrings = Object.assign({}, defaults[item.type]); // shallow clone
 
-             var extent = d.extent(context.graph());
+         var anyToken = new RegExp(/(\{\w+\})/, 'gi'); // Pre-localize the item and default strings
 
-             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'));
+         if (localizerFn) {
+           if (itemStrings.community) {
+             var communityID = simplify(itemStrings.community);
+             itemStrings.community = localizerFn("_communities.".concat(communityID));
+           }
+
+           ['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));
            });
-           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 container = select(this.parentNode.parentNode.parentNode);
-             var info = container.selectAll('.issue-info');
-             var isExpanded = info.classed('expanded');
+         var replacements = {
+           account: item.account,
+           community: itemStrings.community,
+           signupUrl: itemStrings.signupUrl,
+           url: itemStrings.url
+         }; // Resolve URLs first (which may refer to {account})
 
-             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);
-               });
-             }
-           });
-           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
+         if (!replacements.signupUrl) {
+           replacements.signupUrl = resolve(itemStrings.signupUrl || defaultStrings.signupUrl);
+         }
 
-           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 (!replacements.url) {
+           replacements.url = resolve(itemStrings.url || defaultStrings.url);
+         }
 
-           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)
+         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
 
-             if (d.issue.dateLastRanFix && new Date() - d.issue.dateLastRanFix < 1000) return;
-             d.issue.dateLastRanFix = new Date(); // remove hover-highlighting
+         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;
 
-             utilHighlightEntities(d.issue.entityIds.concat(d.entityIds), false, context);
-             new Promise(function (resolve, reject) {
-               d.onClick(context, resolve, reject);
+         function resolve(s, addLinks) {
+           if (!s) return undefined;
+           var result = s;
 
-               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);
-           });
-           buttons.each(function (d) {
-             var iconName = d.icon || 'iD-icon-wrench';
+           for (var key in replacements) {
+             var token = "{".concat(key, "}");
+             var regex = new RegExp(token, 'g');
 
-             if (iconName.startsWith('maki')) {
-               iconName += '-15';
-             }
+             if (regex.test(result)) {
+               var replacement = replacements[key];
 
-             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;
+               if (!replacement) {
+                 throw new Error("Cannot resolve token: ".concat(token));
+               } else {
+                 if (addLinks && (key === 'signupUrl' || key === 'url')) {
+                   replacement = linkify(replacement);
+                 }
+
+                 result = result.replace(regex, replacement);
+               }
              }
+           } // There shouldn't be any leftover tokens in a resolved string
 
-             return null;
-           });
-         }
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
+           var leftovers = result.match(anyToken);
 
-           if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-             _entityIDs = val;
-             _activeIssueID = null;
-             reloadIssues();
+           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 section;
-         };
+           return result;
+         }
 
-         return section;
+         function linkify(url, text) {
+           if (!url) return undefined;
+           text = text || url;
+           return "<a target=\"_blank\" href=\"".concat(url, "\">").concat(text, "</a>");
+         }
        }
 
-       function uiPresetIcon() {
-         var _preset;
-
-         var _geometry;
+       var _oci = null;
+       function uiSuccess(context) {
+         var MAXEVENTS = 2;
+         var dispatch = dispatch$8('cancel');
 
-         var _sizeClass = 'medium';
+         var _changeset;
 
-         function isSmall() {
-           return _sizeClass === 'small';
-         }
+         var _location;
 
-         function presetIcon(selection) {
-           selection.each(render);
-         }
+         ensureOSMCommunityIndex(); // start fetching the data
 
-         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';
-         }
+         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
 
-         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 (vals[0] && Array.isArray(vals[0].features)) {
+               _mainLocations.mergeCustomGeoJSON(vals[0]);
+             }
 
-         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);
-         }
+             var ociResources = Object.values(vals[1].resources);
 
-         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);
+             if (ociResources.length) {
+               // Resolve all locationSet features.
+               return _mainLocations.mergeLocationSets(ociResources).then(function () {
+                 _oci = {
+                   resources: ociResources,
+                   defaults: vals[2].defaults
+                 };
+                 return _oci;
+               });
+             } else {
+               _oci = {
+                 resources: [],
+                 // no resources?
+                 defaults: vals[2].defaults
+               };
+               return _oci;
+             }
            });
+         } // string-to-date parsing in JavaScript is weird
 
-           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);
-             });
+
+         function parseEventDate(when) {
+           if (!when) return;
+           var raw = when.trim();
+           if (!raw) return;
+
+           if (!/Z$/.test(raw)) {
+             // if no trailing 'Z', add one
+             raw += 'Z'; // this forces date to be parsed as a UTC date
            }
 
-           fill = fillEnter.merge(fill);
-           fill.selectAll('path.stroke').attr('class', "area stroke ".concat(tagClasses));
-           fill.selectAll('path.fill').attr('class', "area fill ".concat(tagClasses));
+           var parsed = new Date(raw);
+           return new Date(parsed.toUTCString().substr(0, 25)); // convert to local timezone
          }
 
-         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 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 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));
+           ensureOSMCommunityIndex().then(function (oci) {
+             var loc = context.map().center();
+             var validLocations = _mainLocations.locationsAt(loc); // Gather the communities
+
+             var communities = [];
+             oci.resources.forEach(function (resource) {
+               var area = validLocations[resource.locationSetID];
+               if (!area) return; // Resolve strings
+
+               var localizer = function localizer(stringID) {
+                 return _t.html("community.".concat(stringID));
+               };
+
+               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
+
+             communities.sort(function (a, b) {
+               return a.area - b.area || b.order - a.order;
+             });
+             body.call(showCommunityLinks, communities.map(function (c) {
+               return c.resource;
+             }));
            });
-           [[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);
+         }
+
+         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);
            });
-           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 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 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
+         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 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 (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));
+           }
 
-           if (drawRoute) {
-             var routeType = p.tags.type === 'waterway' ? 'waterway' : p.tags.route;
-             var segmentPresetIDs = routeSegments[routeType];
+           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
 
-             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));
+           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);
+             }
+
+             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
+               }));
              }
            }
-         } // 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.
 
+           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;
 
-         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']
-         };
+               if (d.i18n && d.id) {
+                 name = _t("community.".concat(communityID, ".events.").concat(d.id, ".name"), {
+                   "default": name
+                 });
+               }
 
-         function render() {
-           var p = _preset.apply(this, arguments);
+               return name;
+             });
+             itemEnter.append('div').attr('class', 'community-event-when').text(function (d) {
+               var options = {
+                 weekday: 'short',
+                 day: 'numeric',
+                 month: 'short',
+                 year: 'numeric'
+               };
 
-           var geom = _geometry ? _geometry.apply(this, arguments) : null;
+               if (d.date.getHours() || d.date.getMinutes()) {
+                 // include time if it has one
+                 options.hour = 'numeric';
+                 options.minute = 'numeric';
+               }
 
-           if (geom === 'relation' && p.tags && (p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route] || p.tags.type === 'waterway')) {
-             geom = 'route';
+               return d.date.toLocaleString(_mainLocalizer.localeCode(), options);
+             });
+             itemEnter.append('div').attr('class', 'community-event-where').text(function (d) {
+               var where = d.where;
+
+               if (d.i18n && d.id) {
+                 where = _t("community.".concat(communityID, ".events.").concat(d.id, ".where"), {
+                   "default": where
+                 });
+               }
+
+               return where;
+             });
+             itemEnter.append('div').attr('class', 'community-event-description').text(function (d) {
+               var description = d.description;
+
+               if (d.i18n && d.id) {
+                 description = _t("community.".concat(communityID, ".events.").concat(d.id, ".description"), {
+                   "default": description
+                 });
+               }
+
+               return description;
+             });
            }
+         }
 
-           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) : {};
+         success.changeset = function (val) {
+           if (!arguments.length) return _changeset;
+           _changeset = val;
+           return success;
+         };
 
-           for (var k in tags) {
-             if (tags[k] === '*') {
-               tags[k] = 'yes';
-             }
+         success.location = function (val) {
+           if (!arguments.length) return _location;
+           _location = val;
+           return success;
+         };
+
+         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 {
+             isNewUser = true;
+             isNewVersion = true;
            }
 
-           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);
+           corePreferences('sawVersion', currVersion);
+           sawVersion = currVersion;
          }
 
-         presetIcon.preset = function (val) {
-           if (!arguments.length) return _preset;
-           _preset = utilFunctor(val);
-           return presetIcon;
+         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')));
+           }
          };
+       }
+
+       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 zoomIn(d3_event) {
+           if (d3_event.shiftKey) return;
+           d3_event.preventDefault();
+           context.map().zoomIn();
+         }
 
-         presetIcon.geometry = function (val) {
-           if (!arguments.length) return _geometry;
-           _geometry = utilFunctor(val);
-           return presetIcon;
-         };
+         function zoomOut(d3_event) {
+           if (d3_event.shiftKey) return;
+           d3_event.preventDefault();
+           context.map().zoomOut();
+         }
 
-         presetIcon.sizeClass = function (val) {
-           if (!arguments.length) return _sizeClass;
-           _sizeClass = val;
-           return presetIcon;
-         };
+         function zoomInFurther(d3_event) {
+           if (d3_event.shiftKey) return;
+           d3_event.preventDefault();
+           context.map().zoomInFurther();
+         }
 
-         return presetIcon;
-       }
+         function zoomOutFurther(d3_event) {
+           if (d3_event.shiftKey) return;
+           d3_event.preventDefault();
+           context.map().zoomOutFurther();
+         }
 
-       function uiSectionFeatureType(context) {
-         var dispatch$1 = dispatch('choose');
-         var _entityIDs = [];
-         var _presets = [];
+         return function (selection) {
+           var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function (d) {
+             if (d.disabled()) {
+               return d.disabledTitle;
+             }
 
-         var _tagReference;
+             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)();
+             }
 
-         var section = uiSection('feature-type', context).label(_t.html('inspector.feature_type')).disclosureContent(renderDisclosureContent);
+             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);
+           });
 
-         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
+           function updateButtonStates() {
+             buttons.classed('disabled', function (d) {
+               return d.disabled();
+             }).each(function () {
+               var selection = select(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);
+               if (!selection.select('.tooltip.in').empty()) {
+                 selection.call(tooltipBehavior.updateContent);
+               }
+             });
            }
 
-           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) {
+           updateButtonStates();
+           context.map().on('move.uiZoom', updateButtonStates);
+         };
+       }
+
+       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'
+         }];
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return section;
-         };
+         var _tagView = corePreferences('raw-tag-editor-view') || 'list'; // 'list, 'text'
 
-         section.presets = function (val) {
-           if (!arguments.length) return _presets; // don't reload the same preset
 
-           if (!utilArrayIdentical(val, _presets)) {
-             _presets = val;
+         var _readOnlyTags = []; // the keys in the order we want them to display
 
-             if (_presets.length === 1) {
-               _tagReference = uiTagReference(_presets[0].reference()).showing(false);
-             }
-           }
+         var _orderedKeys = [];
+         var _showBlank = false;
+         var _pendingChange = null;
 
-           return section;
-         };
+         var _state;
 
-         function entityGeometries() {
-           var counts = {};
+         var _presets;
 
-           for (var i in _entityIDs) {
-             var geometry = context.graph().geometry(_entityIDs[i]);
-             if (!counts[geometry]) counts[geometry] = 0;
-             counts[geometry] += 1;
-           }
+         var _tags;
 
-           return Object.keys(counts).sort(function (geom1, geom2) {
-             return counts[geom2] - counts[geom1];
-           });
+         var _entityIDs;
+
+         var _didInteract = false;
+
+         function interacted() {
+           _didInteract = true;
          }
 
-         return utilRebind(section, dispatch$1, 'on');
-       }
+         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
 
-       // It borrows some code from uiHelp
+           var all = Object.keys(_tags).sort();
+           var missingKeys = utilArrayDifference(all, _orderedKeys);
 
-       function uiFieldHelp(context, fieldName) {
-         var fieldHelp = {};
+           for (var i in missingKeys) {
+             _orderedKeys.push(missingKeys[i]);
+           } // assemble row data
 
-         var _inspector = select(null);
 
-         var _wrap = select(null);
+           var rowData = _orderedKeys.map(function (key, i) {
+             return {
+               index: i,
+               key: key,
+               value: _tags[key]
+             };
+           }); // append blank row last, if necessary
 
-         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
+           if (!rowData.length || _showBlank) {
+             _showBlank = false;
+             rowData.push({
+               index: rowData.length,
+               key: '',
+               value: ''
+             });
+           } // View Options
 
-         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?
 
-             var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
+           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;
+             });
+             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
 
-             return all + hhh + _t.html(subkey, replacements) + '\n\n';
-           }, '');
-           return {
-             key: helpkey,
-             title: _t.html(helpkey + '.title'),
-             html: marked_1(text.trim())
-           };
-         });
+           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
 
-         function show() {
-           updatePosition();
+           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
 
-           _body.classed('hide', false).style('opacity', '0').transition().duration(200).style('opacity', '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
 
-         function hide() {
-           _body.classed('hide', true).transition().duration(200).style('opacity', '0').on('end', function () {
-             _body.classed('hide', true);
+           addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+           // Tag list items
+
+           var items = list.selectAll('.tag-row').data(rowData, function (d) {
+             return d.key;
            });
-         }
+           items.exit().each(unbind).remove(); // Enter
 
-         function clickHelp(index) {
-           var d = docs[index];
-           var tkeys = fieldHelpKeys[fieldName][index][1];
+           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
 
-           _body.selectAll('.field-help-nav-item').classed('active', function (d, i) {
-             return i === index;
+           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 content = _body.selectAll('.field-help-content').html(d.html); // class the paragraphs so we can find and style them
-
+             var value = row.select('input.value'); // propagate bound data
 
-           content.selectAll('p').attr('class', function (d, i) {
-             return tkeys[i];
-           }); // insert special content for certain help sections
+             if (_entityIDs && taginfo && _state !== 'hover') {
+               bindTypeahead(key, value);
+             }
 
-           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'));
-           }
-         }
+             var referenceOptions = {
+               key: d.key
+             };
 
-         fieldHelp.button = function (selection) {
-           if (_body.empty()) return;
-           var button = selection.selectAll('.field-help-button').data([0]); // enter/update
+             if (typeof d.value === 'string') {
+               referenceOptions.value = d.value;
+             }
 
-           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();
+             var reference = uiTagReference(referenceOptions);
 
-             if (_body.classed('hide')) {
-               show();
-             } else {
-               hide();
+             if (_state === 'hover') {
+               reference.showing(false);
              }
-           });
-         };
 
-         function updatePosition() {
-           var wrap = _wrap.node();
+             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
+         }
 
-           var inspector = _inspector.node();
+         function isReadOnly(d) {
+           for (var i = 0; i < _readOnlyTags.length; i++) {
+             if (d.key.match(_readOnlyTags[i]) !== null) {
+               return true;
+             }
+           }
 
-           var wRect = wrap.getBoundingClientRect();
-           var iRect = inspector.getBoundingClientRect();
+           return false;
+         }
 
-           _body.style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
+         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');
          }
 
-         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 stringify(s) {
+           return JSON.stringify(s).slice(1, -1); // without leading/trailing "
+         }
 
-           _inspector = context.container().select('.sidebar .entity-editor-pane .inspector-body');
-           if (_inspector.empty()) return;
-           _body = _inspector.selectAll('.field-help-body').data([0]);
+         function unstringify(s) {
+           var leading = '';
+           var trailing = '';
 
-           var enter = _body.enter().append('div').attr('class', 'field-help-body hide'); // initially hidden
+           if (s.length < 1 || s.charAt(0) !== '"') {
+             leading = '"';
+           }
 
+           if (s.length < 2 || s.charAt(s.length - 1) !== '"' || s.charAt(s.length - 1) === '"' && s.charAt(s.length - 2) === '\\') {
+             trailing = '"';
+           }
 
-           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) {
-             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);
-         };
+           return JSON.parse(leading + s + trailing);
+         }
 
-         return fieldHelp;
-       }
+         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');
 
-       function uiFieldCheck(field, context) {
-         var dispatch$1 = dispatch('change');
-         var options = field.strings && field.strings.options;
-         var values = [];
-         var texts = [];
+           if (_state !== 'hover' && str.length) {
+             return str + '\n';
+           }
 
-         var _tags;
+           return str;
+         }
 
-         var input = select(null);
-         var text = select(null);
-         var label = select(null);
-         var reverser = select(null);
+         function textChanged() {
+           var newText = this.value.trim();
+           var newTags = {};
+           newText.split('\n').forEach(function (row) {
+             var m = row.match(/^\s*([^=]+)=(.*)$/);
 
-         var _impliedYes;
+             if (m !== null) {
+               var k = context.cleanTagKey(unstringify(m[1].trim()));
+               var v = context.cleanTagValue(unstringify(m[2].trim()));
+               newTags[k] = v;
+             }
+           });
+           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 _entityIDs = [];
+             if (change.newVal === '*' && typeof change.oldVal !== 'string') return;
 
-         var _value;
+             if (change.type === '-') {
+               _pendingChange[change.key] = undefined;
+             } else if (change.type === '+') {
+               _pendingChange[change.key] = change.newVal || '';
+             }
+           });
 
-         if (options) {
-           for (var k in options) {
-             values.push(k === 'undefined' ? undefined : k);
-             texts.push(field.t.html('options.' + k, {
-               'default': options[k]
-             }));
+           if (Object.keys(_pendingChange).length === 0) {
+             _pendingChange = null;
+             return;
            }
-         } else {
-           values = [undefined, 'yes'];
-           texts = [_t.html('inspector.unknown'), _t.html('inspector.check.yes')];
 
-           if (field.type !== 'defaultCheck') {
-             values.push('no');
-             texts.push(_t.html('inspector.check.no'));
+           scheduleChange();
+         }
+
+         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();
            }
-         } // Checks tags to see whether an undefined value is "Assumed to be Yes"
+         }
 
+         function bindTypeahead(key, value) {
+           if (isReadOnly(key.datum())) return;
 
-         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
+           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;
+
+               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));
+               }
+             });
+           }));
+           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 (field.id === 'oneway') {
-             var entity = context.entity(_entityIDs[0]);
+           function sort(value, data) {
+             var sameletter = [];
+             var other = [];
 
-             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;
+             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);
            }
          }
 
-         function reverserHidden() {
-           if (!context.container().select('div.inspector-hover').empty()) return true;
-           return !(_value === 'yes' || _impliedYes && !_value);
+         function unbind() {
+           var row = select(this);
+           row.selectAll('input.key').call(uiCombobox.off, context);
+           row.selectAll('input.value').call(uiCombobox.off, context);
          }
 
-         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 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
 
-         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');
+           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 (field.type === 'onewayCheck') {
-             enter.append('button').attr('class', 'reverser' + (reverserHidden() ? ' hide' : '')).append('span').attr('class', 'reverser-span');
+           if (isReadOnly({
+             key: kNew
+           })) {
+             this.value = kOld;
+             return;
            }
 
-           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 (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 (Array.isArray(_tags[field.key])) {
-               if (values.indexOf('yes') !== -1) {
-                 t[field.key] = 'yes';
-               } else {
-                 t[field.key] = values[0];
+             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();
                }
-             } 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)
-
-
-             if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
-               t[field.key] = values[0];
-             }
+             });
+             return;
+           }
 
-             dispatch$1.call('change', this, t);
-           });
+           _pendingChange = _pendingChange || {};
 
-           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);
-                 }
+           if (kOld) {
+             if (kOld === kNew) return; // a tag key was renamed
 
-                 return graph;
-               }, _t('operations.reverse.annotation.line', {
-                 n: 1
-               })); // must manually revalidate since no 'change' event was called
+             _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
 
-               context.validator().validate();
-               select(this).call(reverserSetText);
-             });
-           }
-         };
 
-         check.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return check;
-         };
+           var existingKeyIndex = _orderedKeys.indexOf(kOld);
 
-         check.tags = function (tags) {
-           _tags = tags;
+           if (existingKeyIndex !== -1) _orderedKeys[existingKeyIndex] = kNew;
+           d.key = kNew; // update datum to avoid exit/enter on tag update
 
-           function isChecked(val) {
-             return val !== 'no' && val !== '' && val !== undefined && val !== null;
-           }
+           this.value = kNew;
+           scheduleChange();
+         }
 
-           function textFor(val) {
-             if (val === '') val = undefined;
-             var index = values.indexOf(val);
-             return index !== -1 ? texts[index] : '"' + val + '"';
-           }
+         function valueChange(d3_event, d) {
+           if (isReadOnly(d)) return; // exit if this is a multiselection and no value was entered
 
-           checkImpliedYes();
-           var isMixed = Array.isArray(tags[field.key]);
-           _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();
+           if (typeof d.value !== 'string' && !this.value) return; // exit if we are currently about to delete this row anyway - #6366
 
-           if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
-             _value = 'yes';
-           }
+           if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) return;
+           _pendingChange = _pendingChange || {};
+           _pendingChange[d.key] = context.cleanTagValue(this.value);
+           scheduleChange();
+         }
 
-           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 removeTag(d3_event, d) {
+           if (isReadOnly(d)) return;
 
-           if (field.type === 'onewayCheck') {
-             reverser.classed('hide', reverserHidden()).call(reverserSetText);
+           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();
            }
-         };
-
-         check.focus = function () {
-           input.node().focus();
-         };
+         }
 
-         return utilRebind(check, dispatch$1, 'on');
-       }
+         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 uiFieldCombo(field, context) {
-         var dispatch$1 = dispatch('change');
+         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 _isMulti = field.type === 'multiCombo' || field.type === 'manyCombo';
+           window.setTimeout(function () {
+             if (!_pendingChange) return;
+             dispatch.call('change', this, entityIDs, _pendingChange);
+             _pendingChange = null;
+           }, 10);
+         }
 
-         var _isNetwork = field.type === 'networkCombo';
+         section.state = function (val) {
+           if (!arguments.length) return _state;
 
-         var _isSemi = field.type === 'semiCombo';
+           if (_state !== val) {
+             _orderedKeys = [];
+             _state = val;
+           }
 
-         var _optstrings = field.strings && field.strings.options;
+           return section;
+         };
 
-         var _optarray = field.options;
+         section.presets = function (val) {
+           if (!arguments.length) return _presets;
+           _presets = val;
 
-         var _snake_case = field.snake_case || field.snake_case === undefined;
+           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 _combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(field.caseSensitive).minItems(_isMulti || _isSemi ? 1 : 2);
+           return section;
+         };
 
-         var _container = select(null);
+         section.tags = function (val) {
+           if (!arguments.length) return _tags;
+           _tags = val;
+           return section;
+         };
 
-         var _inputWrap = select(null);
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
 
-         var _input = select(null);
+           if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+             _entityIDs = val;
+             _orderedKeys = [];
+           }
 
-         var _comboData = [];
-         var _multiData = [];
-         var _entityIDs = [];
+           return section;
+         }; // pass an array of regular expressions to test against the tag key
 
-         var _tags;
 
-         var _countryCode;
+         section.readOnlyTags = function (val) {
+           if (!arguments.length) return _readOnlyTags;
+           _readOnlyTags = val;
+           return section;
+         };
 
-         var _staticPlaceholder; // initialize deprecated tags array
+         return utilRebind(section, dispatch, 'on');
+       }
 
+       function uiDataEditor(context) {
+         var dataHeader = uiDataHeader();
+         var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context).expandedByDefault(true).readOnlyTags([/./]);
 
-         var _dataDeprecated = [];
-         _mainFileFetcher.get('deprecated').then(function (d) {
-           _dataDeprecated = d;
-         })["catch"](function () {
-           /* ignore */
-         }); // ensure multiCombo field.key ends with a ':'
+         var _datum;
 
-         if (_isMulti && field.key && /[^:]$/.test(field.key)) {
-           field.key += ':';
-         }
+         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
 
-         function snake(s) {
-           return s.replace(/\s+/g, '_');
-         }
+           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
 
-         function unsnake(s) {
-           return s.replace(/_+/g, ' ');
+           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 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 tagValue(dval) {
-           dval = clean(dval || '');
+         dataEditor.datum = function (val) {
+           if (!arguments.length) return _datum;
+           _datum = val;
+           return this;
+         };
 
-           if (_optstrings) {
-             var found = _comboData.find(function (o) {
-               return o.key && clean(o.value) === dval;
-             });
+         return dataEditor;
+       }
 
-             if (found) {
-               return found.key;
-             }
-           }
+       function uiOsmoseDetails(context) {
+         var _qaItem;
 
-           if (field.type === 'typeCombo' && !dval) {
-             return 'yes';
-           }
+         function issueString(d, type) {
+           if (!d) return ''; // Issue strings are cached from Osmose API
 
-           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)
+           var s = services.osmose.getStrings(d.itemType);
+           return type in s ? s[type] : '';
+         }
 
+         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
 
-         function displayValue(tval) {
-           tval = tval || '';
+           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)
 
-           if (_optstrings) {
-             var found = _comboData.find(function (o) {
-               return o.key === tval && o.value;
-             });
 
-             if (found) {
-               return found.value;
-             }
-           }
+           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 (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
-             return '';
-           }
+           if (issueString(_qaItem, 'fix')) {
+             var _div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
 
-           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}]
-         //
+             _div.append('h4').call(_t.append('QA.osmose.fix_title'));
 
+             _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 objectDifference(a, b) {
-           return a.filter(function (d1) {
-             return !b.some(function (d2) {
-               return !d2.isMixed && d1.value === d2.value;
-             });
-           });
-         }
 
-         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);
-           }
-         }
+           if (issueString(_qaItem, 'trap')) {
+             var _div2 = detailsEnter.append('div').attr('class', 'qa-details-subsection');
 
-         function setStaticValues(callback) {
-           if (!(_optstrings || _optarray)) return;
+             _div2.append('h4').call(_t.append('QA.osmose.trap_title'));
 
-           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
-               };
-             });
-           }
+             _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
 
-           _combobox.data(objectDifference(_comboData, _multiData));
 
-           if (callback) callback(_comboData);
-         }
+           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
 
-         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 (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
 
-           if (hasCountryPrefix) {
-             query = _countryCode + ':';
-           }
+             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 params = {
-             debounce: q !== '',
-             key: field.key,
-             query: query
-           };
 
-           if (_entityIDs.length) {
-             params.geometry = context.graph().geometry(_entityIDs[0]);
-           }
+             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
 
-           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
+               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 (!osmlayer.enabled()) {
+                   osmlayer.enabled(true);
+                 }
 
-               return !d.count || d.count > 10;
-             });
-             var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];
+                 context.map().centerZoom(d.loc, 20);
 
-             if (deprecatedValues) {
-               // don't suggest deprecated tag values
-               data = data.filter(function (d) {
-                 return deprecatedValues.indexOf(d.value) === -1;
-               });
-             }
+                 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)
 
-             if (hasCountryPrefix) {
-               data = data.filter(function (d) {
-                 return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
-               });
-             } // hide the caret if there are no suggestions
+               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
+                 }
 
-             _container.classed('empty-combobox', data.length === 0);
+                 if (name) {
+                   this.innerText = name;
+                 }
+               }
+             }); // Don't hide entities related to this issue - #5880
 
-             _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.features().forceVisible(d.elems);
+             context.map().pan([0, 0]); // trigger a redraw
+           })["catch"](function (err) {
+             console.log(err); // eslint-disable-line no-console
            });
          }
 
-         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 (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
-             _staticPlaceholder += '…';
-           }
-
-           var ph;
-
-           if (!_isMulti && !_isSemi && _tags && Array.isArray(_tags[field.key])) {
-             ph = _t('inspector.multiple_values');
-           } else {
-             ph = _staticPlaceholder;
-           }
-
-           _container.selectAll('input').attr('placeholder', ph);
-         }
-
-         function change() {
-           var t = {};
-           var val;
-
-           if (_isMulti || _isSemi) {
-             val = tagValue(utilGetSetValue(_input).replace(/,/g, ';')) || '';
+         osmoseDetails.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return osmoseDetails;
+         };
 
-             _container.classed('active', false);
+         return osmoseDetails;
+       }
 
-             utilGetSetValue(_input, '');
-             var vals = val.split(';').filter(Boolean);
-             if (!vals.length) return;
+       function uiOsmoseHeader() {
+         var _qaItem;
 
-             if (_isMulti) {
-               utilArrayUniq(vals).forEach(function (v) {
-                 var key = (field.key || '') + v;
+         function issueTitle(d) {
+           var unknown = _t('inspector.unknown');
+           if (!d) return unknown; // Issue titles supplied by Osmose
 
-                 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;
-                 }
+           var s = services.osmose.getStrings(d.itemType);
+           return 'title' in s ? s.title : unknown;
+         }
 
-                 key = context.cleanTagKey(key);
-                 field.keys.push(key);
-                 t[key] = 'yes';
-               });
-             } else if (_isSemi) {
-               var arr = _multiData.map(function (d) {
-                 return d.key;
-               });
+         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;
 
-               arr = arr.concat(vals);
-               t[field.key] = context.cleanTagValue(utilArrayUniq(arr).filter(Boolean).join(';'));
+             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);
+         }
 
-             window.setTimeout(function () {
-               _input.node().focus();
-             }, 10);
-           } else {
-             var rawValue = utilGetSetValue(_input); // don't override multiple values with blank string
-
-             if (!rawValue && Array.isArray(_tags[field.key])) return;
-             val = context.cleanTagValue(tagValue(rawValue));
-             t[field.key] = val || undefined;
-           }
+         osmoseHeader.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return osmoseHeader;
+         };
 
-           dispatch$1.call('change', this, t);
-         }
+         return osmoseHeader;
+       }
 
-         function removeMultikey(d3_event, d) {
-           d3_event.preventDefault();
-           d3_event.stopPropagation();
-           var t = {};
+       function uiViewOnOsmose() {
+         var _qaItem;
 
-           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 viewOnOsmose(selection) {
+           var url;
 
-             arr = utilArrayUniq(arr);
-             t[field.key] = arr.length ? arr.join(';') : undefined;
+           if (services.osmose && _qaItem instanceof QAItem) {
+             url = services.osmose.itemURL(_qaItem);
            }
 
-           dispatch$1.call('change', this, t);
-         }
-
-         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);
+           var link = selection.selectAll('.view-on-osmose').data(url ? [url] : []); // exit
 
-           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
+           link.exit().remove(); // enter
 
-             if (field.key === 'destination') {
-               listClass += ' full-line-chips';
-             }
+           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').call(_t.append('inspector.view_on_osmose'));
+         }
 
-             _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]);
-           }
+         viewOnOsmose.what = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return viewOnOsmose;
+         };
 
-           _input = _input.enter().append('input').attr('type', 'text').attr('id', field.domId).call(utilNoAuto).call(initCombo, selection).merge(_input);
+         return viewOnOsmose;
+       }
 
-           if (_isNetwork) {
-             var extent = combinedEntityExtent();
-             var countryCode = extent && iso1A2Code(extent.center());
-             _countryCode = countryCode && countryCode.toLowerCase();
-           }
+       function uiOsmoseEditor(context) {
+         var dispatch = dispatch$8('change');
+         var qaDetails = uiOsmoseDetails(context);
+         var qaHeader = uiOsmoseHeader();
 
-           _input.on('change', change).on('blur', change);
+         var _qaItem;
 
-           _input.on('keydown.field', function (d3_event) {
-             switch (d3_event.keyCode) {
-               case 13:
-                 // ↩ Return
-                 _input.node().blur(); // blurring also enters the value
+         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();
 
-                 d3_event.stopPropagation();
-                 break;
-             }
-           });
+           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 (_isMulti || _isSemi) {
-             _combobox.on('accept', function () {
-               _input.node().blur();
+           saveSection.exit().remove(); // enter
 
-               _input.node().focus();
-             });
+           var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf'); // update
 
-             _input.on('focus', function () {
-               _container.classed('active', true);
-             });
-           }
+           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
          }
 
-         combo.tags = function (tags) {
-           _tags = tags;
+         function qaSaveButtons(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-           if (_isMulti || _isSemi) {
-             _multiData = [];
-             var maxLength;
+           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+             return d.status + d.id;
+           }); // exit
 
-             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;
+           buttonSection.exit().remove(); // enter
 
-                 _multiData.push({
-                   key: k,
-                   value: displayValue(suffix),
-                   isMixed: Array.isArray(v)
-                 });
-               }
+           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 (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
+           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
 
-                 maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
-               } else {
-                 maxLength = context.maxCharsForTagKey();
-               }
-             } else if (_isSemi) {
-               var allValues = [];
-               var commonValues;
+             var qaService = services.osmose;
 
-               if (Array.isArray(tags[field.key])) {
-                 tags[field.key].forEach(function (tagVal) {
-                   var thisVals = utilArrayUniq((tagVal || '').split(';')).filter(Boolean);
-                   allValues = allValues.concat(thisVals);
+             if (qaService) {
+               d.newStatus = 'done';
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
+             }
+           });
+           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 (!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;
-               }
+             var qaService = services.osmose;
 
-               _multiData = allValues.map(function (v) {
-                 return {
-                   key: v,
-                   value: displayValue(v),
-                   isMixed: !commonValues.includes(v)
-                 };
+             if (qaService) {
+               d.newStatus = 'false';
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
                });
-               var currLength = utilUnicodeCharsCount(commonValues.join(';')); // limit the input length to the remaining available characters
+             }
+           });
+         } // NOTE: Don't change method name until UI v3 is merged
 
-               maxLength = context.maxCharsForTagValue() - currLength;
 
-               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
+         osmoseEditor.error = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return osmoseEditor;
+         };
 
+         return utilRebind(osmoseEditor, dispatch, 'on');
+       }
 
-             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 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);
 
-             var available = objectDifference(_comboData, _multiData);
+         var _current;
 
-             _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 _wasData = false;
+         var _wasNote = false;
+         var _wasQaItem = false; // use pointer events on supported platforms; fallback to mouse events
 
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-             var hideAdd = _optstrings && !available.length || maxLength <= 0;
+         function sidebar(selection) {
+           var container = context.container();
+           var minWidth = 240;
+           var sidebarWidth;
+           var containerWidth;
+           var dragOffset; // Set the initial width constraints
 
-             _container.selectAll('.chiplist .input-wrap').style('display', hideAdd ? 'none' : null); // Render chips
+           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 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 chips = _container.selectAll('.chip').data(_multiData);
+             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
 
-             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;
-             });
+             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);
+           }
 
-             if (allowDragAndDrop) {
-               registerDragAndDrop(chips);
+           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 + '%');
+
+               if (isCollapsed) {
+                 context.ui().onResize([-sidebarWidth * scaleX, 0]);
+               } else {
+                 context.ui().onResize([-dx * scaleX, 0]);
+               }
              }
+           }
 
-             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);
+           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);
            }
-         };
 
-         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;
+           var featureListWrap = selection.append('div').attr('class', 'feature-list-pane').call(uiFeatureList(context));
+           var inspectorWrap = selection.append('div').attr('class', 'inspector-hidden inspector-wrap');
 
-             if (field.key === 'destination') {
-               // meaning tags are full width
-               _container.selectAll('.chip').style('transform', function (d2, index2) {
-                 var node = select(this).node();
+           var hoverModeSelect = function hoverModeSelect(targets) {
+             context.container().selectAll('.feature-list-item button').classed('hover', false);
 
-                 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;
-                   }
+             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;
+               });
 
-                   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;
-                   }
+               if (!elements.empty()) {
+                 elements.classed('hover', true);
+               }
+             }
+           };
 
-                   return 'translateY(100%)';
-                 }
+           sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);
 
-                 return null;
-               });
-             } else {
-               _container.selectAll('.chip').each(function (d2, index2) {
-                 var node = select(this).node(); // check the cursor is in the bounding box
+           function hover(targets) {
+             var datum = targets && targets.length && targets[0];
 
-                 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 (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 (index === index2) {
-                   return 'translate(' + x + 'px, ' + y + 'px)';
-                 } // only translate tags in the same row
+               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];
 
-                 if (node.offsetTop === targetIndexOffsetTop) {
-                   if (index2 < index && index2 >= targetIndex) {
-                     return 'translateX(' + draggedTagWidth + 'px)';
-                   } else if (index2 > index && index2 <= targetIndex) {
-                     return 'translateX(-' + draggedTagWidth + 'px)';
-                   }
-                 }
+               if (errService) {
+                 // marker may contain stale data - get latest
+                 datum = errService.getError(datum.id);
+               } // Currently only three possible services
 
-                 return null;
-               });
-             }
-           }).on('end', function () {
-             if (!select(this).classed('dragging')) {
-               return;
-             }
 
-             var index = selection.nodes().indexOf(this);
-             select(this).classed('dragging', false);
+               var errEditor;
 
-             _container.selectAll('.chip').style('transform', null);
+               if (datum.service === 'keepRight') {
+                 errEditor = keepRightEditor;
+               } else if (datum.service === 'osmose') {
+                 errEditor = osmoseEditor;
+               } else {
+                 errEditor = improveOsmEditor;
+               }
 
-             if (typeof targetIndex === 'number') {
-               var element = _multiData[index];
+               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 (!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();
+             }
+           }
+
+           sidebar.hover = throttle(hover, 200);
 
-               _multiData.splice(index, 1);
+           sidebar.intersects = function (extent) {
+             var rect = selection.node().getBoundingClientRect();
+             return extent.intersects([context.projection.invert([0, rect.height]), context.projection.invert([rect.width, 0])]);
+           };
 
-               _multiData.splice(targetIndex, 0, element);
+           sidebar.select = function (ids, newFeature) {
+             sidebar.hide();
 
-               var t = {};
+             if (ids && ids.length) {
+               var entity = ids.length === 1 && context.entity(ids[0]);
 
-               if (_multiData.length) {
-                 t[field.key] = _multiData.map(function (element) {
-                   return element.key;
-                 }).join(';');
-               } else {
-                 t[field.key] = undefined;
+               if (entity && newFeature && selection.classed('collapsed')) {
+                 // uncollapse the sidebar
+                 var extent = entity.extent(context.graph());
+                 sidebar.expand(sidebar.intersects(extent));
                }
 
-               dispatch$1.call('change', this, t);
+               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
+
+               inspector.state('select').entityIDs(ids).newFeature(newFeature);
+               inspectorWrap.call(inspector);
+             } else {
+               inspector.state('hide');
              }
+           };
 
-             dragOrigin = undefined;
-             targetIndex = undefined;
-           }));
-         }
+           sidebar.showPresetList = function () {
+             inspector.showList();
+           };
 
-         combo.focus = function () {
-           _input.node().focus();
-         };
+           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);
+           };
 
-         combo.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return combo;
-         };
+           sidebar.hide = function () {
+             featureListWrap.classed('inspector-hidden', false);
+             inspectorWrap.classed('inspector-hidden', true);
+             if (_current) _current.remove();
+             _current = null;
+           };
 
-         function combinedEntityExtent() {
-           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-         }
+           sidebar.expand = function (moveMap) {
+             if (selection.classed('collapsed')) {
+               sidebar.toggle(moveMap);
+             }
+           };
 
-         return utilRebind(combo, dispatch$1, 'on');
-       }
+           sidebar.collapse = function (moveMap) {
+             if (!selection.classed('collapsed')) {
+               sidebar.toggle(moveMap);
+             }
+           };
 
-       function uiFieldText(field, context) {
-         var dispatch$1 = dispatch('change');
-         var input = select(null);
-         var outlinkButton = select(null);
-         var _entityIDs = [];
+           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
 
-         var _tags;
+             selection.style('width', sidebarWidth + 'px');
+             var startMargin, endMargin, lastMargin;
 
-         var _phoneFormats = {};
+             if (isCollapsing) {
+               startMargin = lastMargin = 0;
+               endMargin = -sidebarWidth;
+             } else {
+               startMargin = lastMargin = -sidebarWidth;
+               endMargin = 0;
+             }
 
-         if (field.type === 'tel') {
-           _mainFileFetcher.get('phone_formats').then(function (d) {
-             _phoneFormats = d;
-             updatePhonePlaceholder();
-           })["catch"](function () {
-             /* ignore */
-           });
-         }
+             if (!isCollapsing) {
+               // unhide the sidebar's content before it transitions onscreen
+               selection.classed('collapsed', isCollapsing);
+             }
 
-         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());
+             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 %
 
-           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);
 
-               if (domainResults.length >= 2 && domainResults[1]) {
-                 var domain = domainResults[1];
-                 return _t('icons.view_on', {
-                   domain: domain
-                 });
+               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 '';
-             }).on('click', function (d3_event) {
-               d3_event.preventDefault();
-               var value = validIdentifierValueForLink();
 
-               if (value) {
-                 var url = field.urlFormat.replace(/{value}/, encodeURIComponent(value));
-                 window.open(url, '_blank');
-               }
-             }).merge(outlinkButton);
-           }
-         }
+           resizer.on('dblclick', function (d3_event) {
+             d3_event.preventDefault();
 
-         function updatePhonePlaceholder() {
-           if (input.empty() || !Object.keys(_phoneFormats).length) return;
-           var extent = combinedEntityExtent();
-           var countryCode = extent && iso1A2Code(extent.center());
+             if (d3_event.sourceEvent) {
+               d3_event.sourceEvent.preventDefault();
+             }
 
-           var format = countryCode && _phoneFormats[countryCode.toLowerCase()];
+             sidebar.toggle();
+           }); // ensure hover sidebar is closed when zooming out beyond editable zoom
 
-           if (format) input.attr('placeholder', format);
+           context.map().on('crossEditableZoom.sidebar', function (within) {
+             if (!within && !selection.select('.inspector-hover').empty()) {
+               hover([]);
+             }
+           });
          }
 
-         function validIdentifierValueForLink() {
-           if (field.type === 'identifier' && field.pattern) {
-             var value = utilGetSetValue(input).trim().split(';')[0];
-             return value && value.match(new RegExp(field.pattern));
-           }
+         sidebar.showPresetList = function () {};
 
-           return null;
-         } // clamp number to min/max
+         sidebar.hover = function () {};
 
+         sidebar.hover.cancel = function () {};
 
-         function clamped(num) {
-           if (field.minValue !== undefined) {
-             num = Math.max(num, field.minValue);
-           }
+         sidebar.intersects = function () {};
 
-           if (field.maxValue !== undefined) {
-             num = Math.min(num, field.maxValue);
-           }
+         sidebar.select = function () {};
 
-           return num;
-         }
+         sidebar.show = function () {};
 
-         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
+         sidebar.hide = function () {};
 
-             if (!val && Array.isArray(_tags[field.key])) return;
+         sidebar.expand = function () {};
 
-             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(';');
-               }
+         sidebar.collapse = function () {};
 
-               utilGetSetValue(input, val);
-             }
+         sidebar.toggle = function () {};
 
-             t[field.key] = val || undefined;
-             dispatch$1.call('change', this, t, onInput);
-           };
-         }
+         return sidebar;
+       }
 
-         i.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return i;
+       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;
 
-         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 () {
+           context.install(behavior);
+         };
 
-           if (outlinkButton && !outlinkButton.empty()) {
-             var disabled = !validIdentifierValueForLink();
-             outlinkButton.classed('disabled', disabled);
-           }
+         mode.exit = function () {
+           context.uninstall(behavior);
          };
 
-         i.focus = function () {
-           var node = input.node();
-           if (node) node.focus();
+         mode.selectedIDs = function () {
+           return [wayID];
          };
 
-         function combinedEntityExtent() {
-           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-         }
+         mode.activeID = function () {
+           return behavior && behavior.activeID() || [];
+         };
 
-         return utilRebind(i, dispatch$1, 'on');
+         return mode;
        }
 
-       function uiFieldAccess(field, context) {
-         var dispatch$1 = dispatch('change');
-         var items = select(null);
-
-         var _tags;
+       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');
 
-         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
+         function actionClose(wayId) {
+           return function (graph) {
+             return graph.replace(graph.entity(wayId).close());
+           };
+         }
 
-           var enter = items.enter().append('li').attr('class', function (d) {
-             return 'labeled-input preset-access-' + d;
+         function start(loc) {
+           var startGraph = context.graph();
+           var node = osmNode({
+             loc: loc
            });
-           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);
+           var way = osmWay({
+             tags: defaultTags
            });
-           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
-
-           items = items.merge(enter);
-           wrap.selectAll('.preset-input-access').on('change', change).on('blur', change);
+           context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id));
+           context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
          }
 
-         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$1.call('change', this, tag);
+         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));
          }
 
-         access.options = function (type) {
-           var options = ['no', 'permissive', 'private', 'permit', 'destination'];
-
-           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
-             };
+         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));
+         }
 
-         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.enter = function () {
+           context.install(behavior);
          };
 
-         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');
-             }
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };
 
-             if (d === 'access') {
-               return 'yes';
-             }
+         return mode;
+       }
 
-             if (tags.access && typeof tags.access === 'string') {
-               return tags.access;
-             }
+       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');
 
-             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);
+         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));
+         }
 
-                 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];
-                 }
-               }
-             }
+         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));
+         }
 
-             return field.placeholder();
+         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);
          };
 
-         access.focus = function () {
-           items.selectAll('.preset-input-access').node().focus();
+         mode.exit = function () {
+           context.uninstall(behavior);
          };
 
-         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);
+       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');
 
-         var addrField = _mainPresetIndex.field('address'); // needed for placeholder strings
+         function add(loc) {
+           var node = osmNode({
+             loc: loc,
+             tags: defaultTags
+           });
+           context.perform(actionAddEntity(node), _t('operations.add.annotation.point'));
+           enterSelectMode(node);
+         }
 
-         var _entityIDs = [];
+         function addWay(loc, edge) {
+           var node = osmNode({
+             tags: defaultTags
+           });
+           context.perform(actionAddMidpoint({
+             loc: loc,
+             edge: edge
+           }, node), _t('operations.add.annotation.vertex'));
+           enterSelectMode(node);
+         }
 
-         var _tags;
+         function enterSelectMode(node) {
+           context.enter(modeSelect(context, [node.id]).newFeature(true));
+         }
 
-         var _countryCode;
+         function addNode(node) {
+           if (Object.keys(defaultTags).length === 0) {
+             enterSelectMode(node);
+             return;
+           }
 
-         var _addressFormats = [{
-           format: [['housenumber', 'street'], ['city', 'postcode']]
-         }];
-         _mainFileFetcher.get('address_formats').then(function (d) {
-           _addressFormats = d;
+           var tags = Object.assign({}, node.tags); // shallow copy
 
-           if (!_selection.empty()) {
-             _selection.call(address);
+           for (var key in defaultTags) {
+             tags[key] = defaultTags[key];
            }
-         })["catch"](function () {
-           /* ignore */
-         });
 
-         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');
+           context.perform(actionChangeTags(node.id, tags), _t('operations.add.annotation.point'));
+           enterSelectMode(node);
+         }
 
-           function isAddressable(d) {
-             return d.tags.highway && d.tags.name && d.type === 'way';
-           }
+         function cancel() {
+           context.enter(modeBrowse(context));
          }
 
-         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');
+         mode.enter = function () {
+           context.install(behavior);
+         };
 
-           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;
-             }
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };
 
-             if (d.tags['addr:city']) return true;
-             return false;
-           }
-         }
+         return mode;
+       }
 
-         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');
-         }
+       function modeSelectNote(context, selectedNoteID) {
+         var mode = {
+           id: 'select-note',
+           button: 'browse'
+         };
 
-         function updateForCountryCode() {
-           if (!_countryCode) return;
-           var addressFormat;
+         var _keybinding = utilKeybinding('select-note');
 
-           for (var i = 0; i < _addressFormats.length; i++) {
-             var format = _addressFormats[i];
+         var _noteEditor = uiNoteEditor(context).on('change', function () {
+           context.map().pan([0, 0]); // trigger a redraw
 
-             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
+           var note = checkSelectedID();
+           if (!note) return;
+           context.ui().sidebar.show(_noteEditor.note(note));
+         });
 
-               break;
-             }
-           }
+         var _behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+         var _newFeature = false;
 
-           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
-           };
+         function checkSelectedID() {
+           if (!services.osm) return;
+           var note = services.osm.getNote(selectedNoteID);
 
-           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 (!note) {
+             context.enter(modeBrowse(context));
            }
 
-           var rows = _wrap.selectAll('.addr-row').data(addressFormat.format, function (d) {
-             return d.toString();
-           });
+           return note;
+         } // class the note as selected, or return to browse mode if the note is gone
 
-           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 + '%';
-           });
 
-           function addDropdown(d) {
-             if (dropdowns.indexOf(d.id) === -1) return; // not a dropdown
+         function selectNote(d3_event, drawn) {
+           if (!checkSelectedID()) return;
+           var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);
 
-             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));
-             }));
+           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 (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+               context.enter(modeBrowse(context));
+             }
+           } else {
+             selection.classed('selected', true);
+             context.selectedNoteID(selectedNoteID);
            }
+         }
 
-           _wrap.selectAll('input').on('blur', change()).on('change', change());
+         function esc() {
+           if (context.container().select('.combobox').size()) return;
+           context.enter(modeBrowse(context));
+         }
 
-           _wrap.selectAll('input:not(.combobox-input)').on('input', change(true));
+         mode.zoomToSelected = function () {
+           if (!services.osm) return;
+           var note = services.osm.getNote(selectedNoteID);
 
-           if (_tags) updateTags(_tags);
-         }
+           if (note) {
+             context.map().centerZoomEase(note.loc, 20);
+           }
+         };
 
-         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();
+         mode.newFeature = function (val) {
+           if (!arguments.length) return _newFeature;
+           _newFeature = val;
+           return mode;
+         };
 
-           if (extent) {
-             var countryCode;
+         mode.enter = function () {
+           var note = checkSelectedID();
+           if (!note) return;
 
-             if (context.inIntro()) {
-               // localize the address format for the walkthrough
-               countryCode = _t('intro.graph.countrycode');
-             } else {
-               var center = extent.center();
-               countryCode = iso1A2Code(center);
-             }
+           _behaviors.forEach(context.install);
 
-             if (countryCode) {
-               _countryCode = countryCode.toLowerCase();
-               updateForCountryCode();
-             }
-           }
-         }
+           _keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
 
-         function change(onInput) {
-           return function () {
-             var tags = {};
+           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
 
-             _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
+           sidebar.expand(sidebar.intersects(note.extent()));
+           context.map().on('drawn.select', selectNote);
+         };
 
-               if (Array.isArray(_tags[key]) && !value) return;
-               tags[key] = value || undefined;
-             });
+         mode.exit = function () {
+           _behaviors.forEach(context.uninstall);
 
-             dispatch$1.call('change', this, tags, onInput);
-           };
-         }
+           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);
+         };
 
-         function updatePlaceholder(inputSelection) {
-           return inputSelection.attr('placeholder', function (subfield) {
-             if (_tags && Array.isArray(_tags[field.key + ':' + subfield.id])) {
-               return _t('inspector.multiple_values');
-             }
+         return mode;
+       }
 
-             if (_countryCode) {
-               var localkey = subfield.id + '!' + _countryCode;
-               var tkey = addrField.strings.placeholders[localkey] ? localkey : subfield.id;
-               return addrField.t('placeholders.' + tkey);
-             }
+       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 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);
+           context.map().pan([0, 0]);
+           context.selectedNoteID(note.id).enter(modeSelectNote(context, note.id).newFeature(true));
          }
 
-         function combinedEntityExtent() {
-           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         function cancel() {
+           context.enter(modeBrowse(context));
          }
 
-         address.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return address;
+         mode.enter = function () {
+           context.install(behavior);
          };
 
-         address.tags = function (tags) {
-           _tags = tags;
-           updateTags(tags);
+         mode.exit = function () {
+           context.uninstall(behavior);
          };
 
-         address.focus = function () {
-           var node = _wrap.selectAll('input').node();
+         return mode;
+       }
 
-           if (node) node.focus();
+       function modeSave(context) {
+         var mode = {
+           id: 'save'
          };
+         var keybinding = utilKeybinding('modeSave');
+         var commit = uiCommit(context).on('cancel', cancel);
 
-         return utilRebind(address, dispatch$1, 'on');
-       }
+         var _conflictsUi; // uiConflicts
 
-       function uiFieldCycleway(field, context) {
-         var dispatch$1 = dispatch('change');
-         var items = select(null);
-         var wrap = select(null);
 
-         var _tags;
+         var _location;
 
-         function cycleway(selection) {
-           function stripcolon(s) {
-             return s.replace(':', '');
-           }
+         var _success;
 
-           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);
+         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 cancel() {
+           context.enter(modeBrowse(context));
+         }
+
+         function showProgress(num, total) {
+           var modal = context.container().select('.loading-modal .modal-section');
+           var progress = modal.selectAll('.progress').data([0]); // enter/update
+
+           progress.enter().append('div').attr('class', 'progress').merge(progress).text(_t('save.conflict_progress', {
+             num: num,
+             total: total
+           }));
+         }
+
+         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);
            });
-           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);
+           selection.call(_conflictsUi);
+         }
+
+         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();
+         }
+
+         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);
            });
-           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)));
+           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 = items.merge(enter); // Update
+           items.exit().remove();
+         }
 
-           wrap.selectAll('.preset-input-cycleway').on('change', change).on('blur', change);
+         function showSuccess(changeset) {
+           commit.reset();
+
+           var ui = _success.changeset(changeset).location(_location).on('cancel', function () {
+             context.ui().sidebar.hide();
+           });
+
+           context.enter(modeBrowse(context).sidebar(ui));
+         }
+
+         function keybindingOn() {
+           select(document).call(keybinding.on('⎋', cancel, true));
+         }
+
+         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 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 change(d3_event, key) {
-           var newValue = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
+         mode.selectedIDs = function () {
+           return _conflictsUi ? _conflictsUi.shownEntityIds() : [];
+         };
 
-           if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) return;
+         mode.enter = function () {
+           // Show sidebar
+           context.ui().sidebar.expand();
 
-           if (newValue === 'none' || newValue === '') {
-             newValue = undefined;
+           function done() {
+             context.ui().sidebar.show(commit);
            }
 
-           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];
-           }
+           keybindingOn();
+           context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+           var osm = context.connection();
 
-           if (otherValue === 'none' || otherValue === '') {
-             otherValue = undefined;
+           if (!osm) {
+             cancel();
+             return;
            }
 
-           var tag = {}; // If the left and right tags match, use the cycleway tag to tag both
-           // sides the same way
-
-           if (newValue === otherValue) {
-             tag = {
-               cycleway: newValue,
-               'cycleway:left': undefined,
-               'cycleway:right': undefined
-             };
+           if (osm.authenticated()) {
+             done();
            } else {
-             // Always set both left and right as changing one can affect the other
-             tag = {
-               cycleway: undefined
-             };
-             tag[key] = newValue;
-             tag[otherKey] = otherValue;
+             osm.authenticate(function (err) {
+               if (err) {
+                 cancel();
+               } else {
+                 done();
+               }
+             });
            }
-
-           dispatch$1.call('change', this, tag);
-         }
-
-         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
+         mode.exit = function () {
+           keybindingOff();
+           context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
+           context.ui().sidebar.hide();
+         };
 
-           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 = [];
+         return mode;
+       }
 
-               if (Array.isArray(tags.cycleway)) {
-                 vals = vals.concat(tags.cycleway);
-               }
+       function modeSelectError(context, selectedErrorID, selectedErrorService) {
+         var mode = {
+           id: 'select-error',
+           button: 'browse'
+         };
+         var keybinding = utilKeybinding('select-error');
+         var errorService = services[selectedErrorService];
+         var errorEditor;
 
-               if (Array.isArray(tags[d])) {
-                 vals = vals.concat(tags[d]);
-               }
+         switch (selectedErrorService) {
+           case 'improveOSM':
+             errorEditor = uiImproveOsmEditor(context).on('change', function () {
+               context.map().pan([0, 0]); // trigger a redraw
 
-               return vals.filter(Boolean).join('\n');
-             }
+               var error = checkSelectedID();
+               if (!error) return;
+               context.ui().sidebar.show(errorEditor.error(error));
+             });
+             break;
 
-             return null;
-           }).attr('placeholder', function (d) {
-             if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
-               return _t('inspector.multiple_values');
-             }
+           case 'keepRight':
+             errorEditor = uiKeepRightEditor(context).on('change', function () {
+               context.map().pan([0, 0]); // trigger a redraw
 
-             return field.placeholder();
-           }).classed('mixed', function (d) {
-             return Array.isArray(tags.cycleway) || Array.isArray(tags[d]);
-           });
-         };
+               var error = checkSelectedID();
+               if (!error) return;
+               context.ui().sidebar.show(errorEditor.error(error));
+             });
+             break;
 
-         cycleway.focus = function () {
-           var node = wrap.selectAll('input').node();
-           if (node) node.focus();
-         };
+           case 'osmose':
+             errorEditor = uiOsmoseEditor(context).on('change', function () {
+               context.map().pan([0, 0]); // trigger a redraw
 
-         return utilRebind(cycleway, dispatch$1, 'on');
-       }
+               var error = checkSelectedID();
+               if (!error) return;
+               context.ui().sidebar.show(errorEditor.error(error));
+             });
+             break;
+         }
 
-       function uiFieldLanes(field, context) {
-         var dispatch$1 = dispatch('change');
-         var LANE_WIDTH = 40;
-         var LANE_HEIGHT = 200;
-         var _entityIDs = [];
+         var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
 
-         function lanes(selection) {
-           var lanesData = context.entity(_entityIDs[0]).lanes();
+         function checkSelectedID() {
+           if (!errorService) return;
+           var error = errorService.getError(selectedErrorID);
 
-           if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
-             selection.call(lanes.off);
-             return;
+           if (!error) {
+             context.enter(modeBrowse(context));
            }
 
-           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';
-           });
-           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';
-           });
+           return error;
          }
 
-         lanes.entityIDs = function (val) {
-           _entityIDs = val;
+         mode.zoomToSelected = function () {
+           if (!errorService) return;
+           var error = errorService.getError(selectedErrorID);
+
+           if (error) {
+             context.map().centerZoomEase(error.loc, 20);
+           }
          };
 
-         lanes.tags = function () {};
+         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
 
-         lanes.focus = function () {};
+           function selectError(d3_event, drawn) {
+             if (!checkSelectedID()) return;
+             var selection = context.surface().selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);
 
-         lanes.off = function () {};
+             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 (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+                 context.enter(modeBrowse(context));
+               }
+             } else {
+               selection.classed('selected', true);
+               context.selectedErrorID(selectedErrorID);
+             }
+           }
+
+           function esc() {
+             if (context.container().select('.combobox').size()) return;
+             context.enter(modeBrowse(context));
+           }
+         };
+
+         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(lanes, dispatch$1, 'on');
+         return mode;
        }
-       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);
+       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'
+         })];
 
-         var _countryCode;
+         function enabled() {
+           return osmEditable();
+         }
 
-         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 osmEditable() {
+           return context.editable();
+         }
 
+         modes.forEach(function (mode) {
+           context.keybinding().on(mode.key, function () {
+             if (!enabled()) return;
 
-         _mainFileFetcher.get('languages').then(loadLanguagesArray)["catch"](function () {
-           /* ignore */
-         });
-         var _territoryLanguages = {};
-         _mainFileFetcher.get('territory_languages').then(function (d) {
-           _territoryLanguages = d;
-         })["catch"](function () {
-           /* ignore */
+             if (mode.id === context.mode().id) {
+               context.enter(modeBrowse(context));
+             } else {
+               context.enter(mode);
+             }
+           });
          });
-         var allSuggestions = _mainPresetIndex.collection.filter(function (p) {
-           return p.suggestion === true;
-         }); // reuse these combos
 
-         var langCombo = uiCombobox(context, 'localized-lang').fetcher(fetchLanguages).minItems(0);
-         var brandCombo = uiCombobox(context, 'localized-brand').canAutocomplete(false).minItems(1);
+         tool.render = function (selection) {
+           var wrap = selection.append('div').attr('class', 'joined').style('display', 'flex');
 
-         var _selection = select(null);
+           var debouncedUpdate = debounce(update, 500, {
+             leading: true,
+             trailing: true
+           });
 
-         var _multilingual = [];
+           context.map().on('move.modes', debouncedUpdate).on('drawn.modes', debouncedUpdate);
+           context.on('enter.modes', update);
+           update();
 
-         var _buttonTip = uiTooltip().title(_t.html('translate.translate')).placement('left');
+           function update() {
+             var buttons = wrap.selectAll('button.add-button').data(modes, function (d) {
+               return d.id;
+             }); // exit
 
-         var _wikiTitles;
+             buttons.exit().remove(); // enter
 
-         var _entityIDs = [];
+             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 loadLanguagesArray(dataLanguages) {
-           if (_languagesArray.length !== 0) return; // some conversion is needed to ensure correct OSM tags are used
+               var currMode = context.mode().id;
+               if (/^draw/.test(currMode)) return;
 
-           var replacements = {
-             sr: 'sr-Cyrl',
-             // in OSM, `sr` implies Cyrillic
-             'sr-Cyrl': false // `sr-Cyrl` isn't used in OSM
+               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 (buttons.enter().size() || buttons.exit().size()) {
+               context.ui().checkOverflow('.top-toolbar', true);
+             } // update
 
-           for (var code in dataLanguages) {
-             if (replacements[code] === false) continue;
-             var metaCode = code;
-             if (replacements[code]) metaCode = replacements[code];
 
-             _languagesArray.push({
-               localName: _mainLocalizer.languageName(metaCode, {
-                 localOnly: true
-               }),
-               nativeName: dataLanguages[metaCode].nativeName,
-               code: code,
-               label: _mainLocalizer.languageName(metaCode)
+             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;
              });
            }
-         }
+         };
 
-         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 tool;
+       }
 
-             var original = context.graph().base().entities[_entityIDs[0]];
+       function uiToolNotes(context) {
+         var tool = {
+           id: 'notes',
+           label: _t.html('modes.add_note.label')
+         };
+         var mode = modeAddNote(context);
 
-             var hasOriginalName = original && entity.tags.name && entity.tags.name === original.tags.name; // if the name was already edited manually then allow further editing
+         function enabled() {
+           return notesEnabled() && notesEditable();
+         }
 
-             if (!hasOriginalName) return false; // features linked to Wikidata are likely important and should be protected
+         function notesEnabled() {
+           var noteLayer = context.layers().layer('notes');
+           return noteLayer && noteLayer.enabled();
+         }
 
-             if (entity.tags.wikidata) return true; // assume the name has already been confirmed if its source has been researched
+         function notesEditable() {
+           var mode = context.mode();
+           return context.map().notesEditable() && mode && mode.id !== 'save';
+         }
 
-             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
+         context.keybinding().on(mode.key, function () {
+           if (!enabled()) return;
 
-             return isSuggestion && !showsBrand;
-           });
+           if (mode.id === context.mode().id) {
+             context.enter(modeBrowse(context));
+           } else {
+             context.enter(mode);
+           }
+         });
 
-           field.locked(isLocked);
-         } // update _multilingual, maintaining the existing order
+         tool.render = function (selection) {
+           var debouncedUpdate = debounce(update, 500, {
+             leading: true,
+             trailing: true
+           });
 
+           context.map().on('move.notes', debouncedUpdate).on('drawn.notes', debouncedUpdate);
+           context.on('enter.notes', update);
+           update();
 
-         function calcMultilingual(tags) {
-           var existingLangsOrdered = _multilingual.map(function (item) {
-             return item.lang;
-           });
+           function update() {
+             var showNotes = notesEnabled();
+             var data = showNotes ? [mode] : [];
+             var buttons = selection.selectAll('button.add-button').data(data, function (d) {
+               return d.id;
+             }); // exit
 
-           var existingLangs = new Set(existingLangsOrdered.filter(Boolean));
+             buttons.exit().remove(); // enter
 
-           for (var k in tags) {
-             var m = k.match(/^(.*):(.+)$/);
+             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 (m && m[1] === field.key && m[2]) {
-               var item = {
-                 lang: m[2],
-                 value: tags[k]
-               };
+               var currMode = context.mode().id;
+               if (/^draw/.test(currMode)) return;
 
-               if (existingLangs.has(item.lang)) {
-                 // update the value
-                 _multilingual[existingLangsOrdered.indexOf(item.lang)].value = item.value;
-                 existingLangs["delete"](item.lang);
+               if (d.id === currMode) {
+                 context.enter(modeBrowse(context));
                } else {
-                 _multilingual.push(item);
+                 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
+
+             if (buttons.enter().size() || buttons.exit().size()) {
+               context.ui().checkOverflow('.top-toolbar', true);
+             } // update
+
+
+             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;
+             });
            }
+         };
 
-           _multilingual = _multilingual.filter(function (item) {
-             return !item.lang || !existingLangs.has(item.lang);
-           });
-         }
+         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);
+         };
 
-         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
+         return tool;
+       }
 
-           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
+       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;
 
-           input = input.enter().append('input').attr('type', 'text').attr('id', field.domId).attr('class', 'localized-main').call(utilNoAuto).merge(input);
+         function isSaving() {
+           var mode = context.mode();
+           return mode && mode.id === 'save';
+         }
 
-           if (preset && field.id === 'name') {
-             var pTag = preset.id.split('/', 2);
-             var pKey = pTag[0];
-             var pValue = pTag[1];
+         function isDisabled() {
+           return _numChanges === 0 || isSaving();
+         }
 
-             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..
+         function save(d3_event) {
+           d3_event.preventDefault();
 
-               if (allSuggestions.length && goodSuggestions.length) {
-                 input.on('blur.localized', checkBrandOnBlur).call(brandCombo.fetcher(fetchBrandNames(preset, allSuggestions)).on('accept', acceptBrand).on('cancel', cancelBrand));
-               }
-             }
+           if (!context.inIntro() && !isSaving() && history.hasChanges()) {
+             context.enter(modeSave(context));
            }
+         }
 
-           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);
+         function bgColor() {
+           var step;
 
-           if (_tags && !_multilingual.length) {
-             calcMultilingual(_tags);
+           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
            }
+         }
 
-           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.
-
-           function checkBrandOnBlur() {
-             var latest = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
-             if (!latest) return; // deleting the entity blurred the field?
-
-             var preset = _mainPresetIndex.match(latest, context.graph());
-             if (preset && preset.suggestion) return; // already accepted
+         function updateCount() {
+           var val = history.difference().summary().length;
+           if (val === _numChanges) return;
+           _numChanges = val;
 
-             var name = utilGetSetValue(input).trim();
-             var matched = allSuggestions.filter(function (s) {
-               return name === s.name();
-             });
+           if (tooltipBehavior) {
+             tooltipBehavior.title(_t.html(_numChanges > 0 ? 'save.help' : 'save.no_changes')).keys([key]);
+           }
 
-             if (matched.length === 1) {
-               acceptBrand({
-                 suggestion: matched[0]
-               });
-             } else {
-               cancelBrand();
-             }
+           if (button) {
+             button.classed('disabled', isDisabled()).style('background', bgColor());
+             button.select('span.count').text(_numChanges);
            }
+         }
 
-           function acceptBrand(d) {
-             var entity = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
+         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);
 
-             if (!d || !entity) {
-               cancelBrand();
-               return;
+             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'))();
              }
 
-             var tags = entity.tags;
-             var geometry = entity.geometry(context.graph());
-             var removed = preset.unsetTags(tags, geometry);
+             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());
 
-             for (var k in tags) {
-               tags[k] = removed[k]; // set removed tags to `undefined`
+               if (isSaving()) {
+                 button.call(tooltipBehavior.hide);
+               }
              }
+           });
+         };
 
-             tags = d.suggestion.setTags(tags, geometry);
-             utilGetSetValue(input, tags.name);
-             dispatch$1.call('change', this, tags);
-           } // user hit escape
+         tool.uninstall = function () {
+           context.keybinding().off(key, true);
+           context.history().on('change.save', null);
+           context.on('enter.save', null);
+           button = null;
+           tooltipBehavior = null;
+         };
 
+         return tool;
+       }
 
-           function cancelBrand() {
-             var name = utilGetSetValue(input);
-             dispatch$1.call('change', this, {
-               name: name
-             });
-           }
+       function uiToolSidebarToggle(context) {
+         var tool = {
+           id: 'sidebar_toggle',
+           label: _t.html('toolbar.inspect')
+         };
 
-           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
+         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')));
+         };
 
-                     };
-                     results.push(obj);
-                   }
-                 }
+         return tool;
+       }
 
-                 results.sort(function (a, b) {
-                   return a.dist - b.dist;
-                 });
-               }
+       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')
+         }];
 
-               results = results.slice(0, 10);
-               callback(results);
-             };
-           }
+         function editable() {
+           return context.mode() && context.mode().id !== 'save' && context.map().editableDataEnabled(true
+           /* ignore min zoom */
+           );
+         }
 
-           function addNew(d3_event) {
+         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();
-             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;
+             var annotation = d.annotation();
 
-             if (isLangEn || langExists) {
-               defaultLang = '';
-               langExists = _multilingual.find(function (datum) {
-                 return datum.lang === defaultLang;
-               });
+             if (editable() && annotation) {
+               d.action();
              }
 
-             if (!langExists) {
-               // prepend the value so it appears at the top
-               _multilingual.unshift({
-                 lang: defaultLang,
-                 value: ''
-               });
-
-               localizedInputs.call(renderMultilingual);
+             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)();
              }
-           }
-
-           function change(onInput) {
-             return function (d3_event) {
-               if (field.locked()) {
-                 d3_event.preventDefault();
-                 return;
-               }
 
-               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$1.call('change', this, t, onInput);
-             };
-           }
-         }
-
-         function key(lang) {
-           return field.key + ':' + lang;
-         }
-
-         function changeLang(d3_event, d) {
-           var tags = {}; // make sure unrecognized suffixes are lowercase - #7156
+             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();
+           });
 
-           var lang = utilGetSetValue(select(this)).toLowerCase();
+           var debouncedUpdate = debounce(update, 500, {
+             leading: true,
+             trailing: true
+           });
 
-           var language = _languagesArray.find(function (d) {
-             return d.label.toLowerCase() === lang || d.localName && d.localName.toLowerCase() === lang || d.nativeName && d.nativeName.toLowerCase() === lang;
+           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);
 
-           if (language) lang = language.code;
+           function update() {
+             buttons.classed('disabled', function (d) {
+               return !editable() || !d.annotation();
+             }).each(function () {
+               var selection = select(this);
 
-           if (d.lang && d.lang !== lang) {
-             tags[key(d.lang)] = undefined;
+               if (!selection.select('.tooltip.in').empty()) {
+                 selection.call(tooltipBehavior.updateContent);
+               }
+             });
            }
+         };
 
-           var newKey = lang && context.cleanTagKey(key(lang));
-           var value = utilGetSetValue(select(this.parentNode).selectAll('.localized-value'));
+         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);
+         };
 
-           if (newKey && value) {
-             tags[newKey] = value;
-           } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
-             tags[newKey] = _wikiTitles[d.lang];
-           }
+         return tool;
+       }
 
-           d.lang = lang;
-           dispatch$1.call('change', this, tags);
+       function uiTopToolbar(context) {
+         var sidebarToggle = uiToolSidebarToggle(context),
+             modes = uiToolOldDrawModes(context),
+             notes = uiToolNotes(context),
+             undoRedo = uiToolUndoRedo(context),
+             save = uiToolSave(context);
+
+         function notesEnabled() {
+           var noteLayer = context.layers().layer('notes');
+           return noteLayer && noteLayer.enabled();
          }
 
-         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
+         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;
+             }
+           });
 
-           if (!value && Array.isArray(d.value)) return;
-           var t = {};
-           t[key(d.lang)] = value;
-           d.value = value;
-           dispatch$1.call('change', this, t);
-         }
+           var debouncedUpdate = debounce(update, 500, {
+             leading: true,
+             trailing: true
+           });
 
-         function fetchLanguages(value, cb) {
-           var v = value.toLowerCase(); // show the user's language first
+           context.layers().on('change.topToolbar', debouncedUpdate);
+           update();
 
-           var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];
+           function update() {
+             var tools = [sidebarToggle, 'spacer', modes];
+             tools.push('spacer');
 
-           if (_countryCode && _territoryLanguages[_countryCode]) {
-             langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
-           }
+             if (notesEnabled()) {
+               tools = tools.concat([notes, 'spacer']);
+             }
 
-           var langItems = [];
-           langCodes.forEach(function (code) {
-             var langItem = _languagesArray.find(function (item) {
-               return item.code === code;
+             tools = tools.concat([undoRedo, save]);
+             var toolbarItems = bar.selectAll('.toolbar-item').data(tools, function (d) {
+               return d.id || d;
              });
-
-             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
-             };
-           }));
+             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;
+             });
+           }
          }
 
-         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').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();
+         return topToolbar;
+       }
 
-               if (!d.lang || !d.value) {
-                 _multilingual.splice(index, 1);
+       function uiZoomToSelection(context) {
+         function isDisabled() {
+           var mode = context.mode();
+           return !mode || !mode.zoomToSelected;
+         }
 
-                 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);
-           });
-           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();
-           entries.classed('present', function (d) {
-             return d.lang && d.value;
-           });
-           utilGetSetValue(entries.select('.localized-lang'), function (d) {
-             var langItem = _languagesArray.find(function (item) {
-               return item.code === d.lang;
-             });
+         var _lastPointerUpType;
 
-             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);
-           });
+         function pointerup(d3_event) {
+           _lastPointerUpType = d3_event.pointerType;
          }
 
-         localized.tags = function (tags) {
-           _tags = tags; // Fetch translations from wikipedia
+         function click(d3_event) {
+           d3_event.preventDefault();
 
-           if (typeof tags.wikipedia === 'string' && !_wikiTitles) {
-             _wikiTitles = {};
-             var wm = tags.wikipedia.match(/([^:]+):(.+)/);
+           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();
 
-             if (wm && wm[0] && wm[1]) {
-               wikipedia.translations(wm[1], wm[2], function (err, d) {
-                 if (err || !d) return;
-                 _wikiTitles = d;
-               });
+             if (mode && mode.zoomToSelected) {
+               mode.zoomToSelected();
              }
            }
 
-           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);
-         };
-
-         localized.focus = function () {
-           input.node().focus();
-         };
-
-         localized.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           _multilingual = [];
-           loadCountryCode();
-           return localized;
-         };
-
-         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());
+           _lastPointerUpType = null;
          }
 
-         return utilRebind(localized, dispatch$1, 'on');
-       }
+         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 uiFieldMaxspeed(field, context) {
-         var dispatch$1 = dispatch('change');
-         var unitInput = select(null);
-         var input = select(null);
-         var _entityIDs = [];
+             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 _tags;
+           function setEnabledState() {
+             button.classed('disabled', isDisabled());
 
-         var _isImperial;
+             if (!button.select('.tooltip.in').empty()) {
+               button.call(tooltipBehavior.updateContent);
+             }
+           }
 
-         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];
+           context.on('enter.uiZoomToSelection', setEnabledState);
+           setEnabledState();
+         };
+       }
 
-         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 uiPane(id, context) {
+         var _key;
 
-           function changeUnits() {
-             _isImperial = utilGetSetValue(unitInput) === 'mph';
-             utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
-             setUnitSuggestions();
-             change();
-           }
-         }
+         var _label = '';
+         var _description = '';
+         var _iconName = '';
 
-         function setUnitSuggestions() {
-           speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
-           utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
-         }
+         var _sections; // array of uiSection objects
 
-         function comboValues(d) {
-           return {
-             value: d.toString(),
-             title: d.toString()
-           };
-         }
 
-         function change() {
-           var tag = {};
-           var value = utilGetSetValue(input).trim(); // don't override multiple values with blank string
+         var _paneSelection = select(null);
 
-           if (!value && Array.isArray(_tags[field.key])) return;
+         var _paneTooltip;
 
-           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 pane = {
+           id: id
+         };
 
-           dispatch$1.call('change', this, tag);
-         }
+         pane.label = function (val) {
+           if (!arguments.length) return _label;
+           _label = val;
+           return pane;
+         };
 
-         maxspeed.tags = function (tags) {
-           _tags = tags;
-           var value = tags[field.key];
-           var isMixed = Array.isArray(value);
+         pane.key = function (val) {
+           if (!arguments.length) return _key;
+           _key = val;
+           return pane;
+         };
 
-           if (!isMixed) {
-             if (value && value.indexOf('mph') >= 0) {
-               value = parseInt(value, 10).toString();
-               _isImperial = true;
-             } else if (value) {
-               _isImperial = false;
-             }
-           }
+         pane.description = function (val) {
+           if (!arguments.length) return _description;
+           _description = val;
+           return pane;
+         };
 
-           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);
+         pane.iconName = function (val) {
+           if (!arguments.length) return _iconName;
+           _iconName = val;
+           return pane;
          };
 
-         maxspeed.focus = function () {
-           input.node().focus();
+         pane.sections = function (val) {
+           if (!arguments.length) return _sections;
+           _sections = val;
+           return pane;
          };
 
-         maxspeed.entityIDs = function (val) {
-           _entityIDs = val;
+         pane.selection = function () {
+           return _paneSelection;
          };
 
-         function combinedEntityExtent() {
-           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         function hidePane() {
+           context.ui().togglePanes();
          }
 
-         return utilRebind(maxspeed, dispatch$1, 'on');
-       }
+         pane.togglePane = function (d3_event) {
+           if (d3_event) d3_event.preventDefault();
 
-       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
+           _paneTooltip.hide();
 
-         var typeField;
-         var layerField;
-         var _oldType = {};
-         var _entityIDs = [];
+           context.ui().togglePanes(!_paneSelection.classed('shown') ? _paneSelection : undefined);
+         };
 
-         function selectedKey() {
-           var node = wrap.selectAll('.form-field-input-radio label.active input');
-           return !node.empty() && node.datum();
-         }
+         pane.renderToggleButton = function (selection) {
+           if (!_paneTooltip) {
+             _paneTooltip = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_description).keys([_key]);
+           }
 
-         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
+           selection.append('button').on('click', pane.togglePane).call(svgIcon('#' + _iconName, 'light')).call(_paneTooltip);
+         };
+
+         pane.renderContent = function (selection) {
+           // override to fully customize content
+           if (_sections) {
+             _sections.forEach(function (section) {
+               selection.call(section.render);
              });
-           });
-           labels = labels.merge(enter);
-           radios = labels.selectAll('input').on('change', changeRadio);
-         }
+           }
+         };
 
-         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
+         pane.renderPane = function (selection) {
+           _paneSelection = selection.append('div').attr('class', 'fillL map-pane hide ' + id + '-pane').attr('pane', id);
 
-           if (type) {
-             if (!typeField || typeField.id !== selected) {
-               typeField = uiField(context, type, _entityIDs, {
-                 wrap: false
-               }).on('change', changeType);
-             }
+           var heading = _paneSelection.append('div').attr('class', 'pane-heading');
 
-             typeField.tags(tags);
-           } else {
-             typeField = null;
-           }
+           heading.append('h2').html(_label);
+           heading.append('button').attr('title', _t('icons.close')).on('click', hidePane).call(svgIcon('#iD-icon-close'));
 
-           var typeItem = list.selectAll('.structure-type-item').data(typeField ? [typeField] : [], function (d) {
-             return d.id;
-           }); // Exit
+           _paneSelection.append('div').attr('class', 'pane-content').call(pane.renderContent);
 
-           typeItem.exit().remove(); // Enter
+           if (_key) {
+             context.keybinding().on(_key, pane.togglePane);
+           }
+         };
 
-           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
+         return pane;
+       }
 
-           typeItem = typeItem.merge(typeEnter);
+       function uiSectionBackgroundDisplayOptions(context) {
+         var section = uiSection('background-display-options', context).label(_t.html('background.display_options')).disclosureContent(renderDisclosureContent);
 
-           if (typeField) {
-             typeItem.selectAll('.structure-input-type-wrap').call(typeField.render);
-           } // Layer
+         var _detected = utilDetect();
 
+         var _storedOpacity = corePreferences('background-opacity');
 
-           if (layer && showLayer) {
-             if (!layerField) {
-               layerField = uiField(context, layer, _entityIDs, {
-                 wrap: false
-               }).on('change', changeLayer);
-             }
+         var _minVal = 0;
 
-             layerField.tags(tags);
-             field.keys = utilArrayUnion(field.keys, ['layer']);
-           } else {
-             layerField = null;
-             field.keys = field.keys.filter(function (k) {
-               return k !== 'layer';
-             });
-           }
+         var _maxVal = _detected.cssfilters ? 3 : 1;
 
-           var layerItem = list.selectAll('.structure-layer-item').data(layerField ? [layerField] : []); // Exit
+         var _sliders = _detected.cssfilters ? ['brightness', 'contrast', 'saturation', 'sharpness'] : ['brightness'];
 
-           layerItem.exit().remove(); // Enter
+         var _options = {
+           brightness: _storedOpacity !== null ? +_storedOpacity : 1,
+           contrast: 1,
+           saturation: 1,
+           sharpness: 1
+         };
 
-           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 clamp(x, min, max) {
+           return Math.max(min, Math.min(x, max));
+         }
 
-           layerItem = layerItem.merge(layerEnter);
+         function updateValue(d, val) {
+           val = clamp(val, _minVal, _maxVal);
+           _options[d] = val;
+           context.background()[d](val);
 
-           if (layerField) {
-             layerItem.selectAll('.structure-input-layer-wrap').call(layerField.render);
+           if (d === 'brightness') {
+             corePreferences('background-opacity', val);
            }
+
+           section.reRender();
          }
 
-         function changeType(t, onInput) {
-           var key = selectedKey();
-           if (!key) return;
-           var val = t[key];
+         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 (val !== 'no') {
-             _oldType[key] = val;
-           }
+           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 (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
+             if (!val && d3_event && d3_event.target) {
+               val = d3_event.target.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
 
-             if (t.layer === undefined) {
-               if (key === 'bridge' && val !== 'no') {
-                 t.layer = '1';
-               }
+           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();
 
-               if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
-                 t.layer = '-1';
-               }
+             for (var i = 0; i < _sliders.length; i++) {
+               updateValue(_sliders[i], 1);
              }
-           }
+           }); // update
 
-           dispatch$1.call('change', this, t, onInput);
-         }
+           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
 
-         function changeLayer(t, onInput) {
-           if (t.layer === '0') {
-             t.layer = undefined;
+           if (containerEnter.size() && _options.brightness !== 1) {
+             context.background().brightness(_options.brightness);
            }
-
-           dispatch$1.call('change', this, t, onInput);
          }
 
-         function changeRadio() {
-           var t = {};
-           var activeKey;
-
-           if (field.key) {
-             t[field.key] = undefined;
-           }
+         return section;
+       }
 
-           radios.each(function (d) {
-             var active = select(this).property('checked');
-             if (active) activeKey = d;
+       function uiSettingsCustomBackground() {
+         var dispatch = dispatch$8('change');
 
-             if (field.key) {
-               if (active) t[field.key] = d;
-             } else {
-               var val = _oldType[activeKey] || 'yes';
-               t[d] = active ? val : undefined;
-             }
-           });
+         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
 
-           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;
-             }
-           }
+           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);
 
-           dispatch$1.call('change', this, t);
-         }
+           function isSaveDisabled() {
+             return null;
+           } // restore the original template
 
-         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');
-           });
+           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 isMixed(d) {
-             if (field.key) {
-               return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
-             }
 
-             return Array.isArray(tags[d]);
+           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);
            }
+         }
 
-           labels.classed('active', function (d) {
-             if (field.key) {
-               return Array.isArray(tags[field.key]) && tags[field.key].includes(d) || tags[field.key] === d;
-             }
-
-             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;
-           });
-           var selection = radios.filter(function () {
-             return this.checked;
-           });
+         return utilRebind(render, dispatch, 'on');
+       }
 
-           if (selection.empty()) {
-             placeholder.html(_t.html('inspector.none'));
-           } else {
-             placeholder.html(selection.attr('value'));
-             _oldType[selection.datum()] = tags[selection.datum()];
-           }
+       function uiSectionBackgroundList(context) {
+         var _backgroundList = select(null);
 
-           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';
-             }
+         var _customSource = context.background().findSource('custom');
 
-             wrap.call(structureExtras, tags);
-           }
-         };
+         var _settingsCustomBackground = uiSettingsCustomBackground().on('change', customChanged);
 
-         radio.focus = function () {
-           radios.node().focus();
-         };
+         var section = uiSection('background-list', context).label(_t.html('background.backgrounds')).disclosureContent(renderDisclosureContent);
 
-         radio.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           _oldType = {};
-           return radio;
-         };
+         function previousBackgroundID() {
+           return corePreferences('background-last-used-toggle');
+         }
 
-         radio.isAllowed = function () {
-           return _entityIDs.length === 1;
-         };
+         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
 
-         return utilRebind(radio, dispatch$1, 'on');
-       }
+           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');
+           });
+           locPanelLabelEnter.append('span').call(_t.append('background.location_panel.description')); // "Info / Report a Problem" link
 
-       function uiFieldRestrictions(field, context) {
-         var dispatch$1 = dispatch('change');
-         var breathe = behaviorBreathe();
-         corePreferences('turn-restriction-via-way', null); // remove old key
+           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'));
 
-         var storedViaWay = corePreferences('turn-restriction-via-way0'); // use new key #6922
+           _backgroundList.call(drawListItems, 'radio', function (d3_event, d) {
+             chooseBackground(d);
+           }, function (d) {
+             return !d.isHidden() && !d.overlay;
+           });
+         }
 
-         var storedDistance = corePreferences('turn-restriction-distance');
+         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);
 
-         var _maxViaWay = storedViaWay !== null ? +storedViaWay : 0;
+             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()));
+             }
+           });
+         }
 
-         var _maxDistance = storedDistance ? +storedDistance : 30;
+         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 _initialized = false;
+         function updateLayerSelections(selection) {
+           function active(d) {
+             return context.background().showsLayer(d);
+           }
 
-         var _parent = select(null); // the entire field
+           selection.selectAll('li').classed('active', active).classed('switch', function (d) {
+             return d.id === previousBackgroundID();
+           }).call(setTooltips).selectAll('input').property('checked', active);
+         }
 
+         function chooseBackground(d) {
+           if (d.id === 'custom' && !d.template()) {
+             return editCustom();
+           }
 
-         var _container = select(null); // just the map
+           var previousBackground = context.background().baseLayerSource();
+           corePreferences('background-last-used-toggle', previousBackground.id);
+           corePreferences('background-last-used', d.id);
+           context.background().baseLayerSource(d);
+         }
 
+         function customChanged(d) {
+           if (d && d.template) {
+             _customSource.template(d.template);
 
-         var _oldTurns;
+             chooseBackground(_customSource);
+           } else {
+             _customSource.template('');
 
-         var _graph;
+             chooseBackground(context.background().findSource('none'));
+           }
+         }
 
-         var _vertexID;
+         function editCustom() {
+           context.container().call(_settingsCustomBackground);
+         }
 
-         var _intersection;
+         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;
+       }
 
-         var _fromWayID;
+       function uiSectionBackgroundOffset(context) {
+         var section = uiSection('background-offset', context).label(_t.html('background.fix_misalignment')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
 
-         var _lastXPos;
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-         function restrictions(selection) {
-           _parent = selection; // try to reuse the intersection, but always rebuild it if the graph has changed
+         var _directions = [['top', [0, -0.5]], ['left', [-0.5, 0]], ['right', [0.5, 0]], ['bottom', [0, 0.5]]];
 
-           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.
+         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 resetOffset() {
+           context.background().offset([0, 0]);
+           updateValue();
+         }
 
-           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
+         function nudge(d) {
+           context.background().nudge(d, context.map().zoom());
+           updateValue();
+         }
 
-           select(selection.node().parentNode).classed('hide', !isOK); // if form field is hidden or has detached from dom, clean up.
+         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 (!isOK || !context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode || !selection.node().parentNode.parentNode) {
-             selection.call(restrictions.off);
+           if (d.length !== 2 || !d[0] || !d[1]) {
+             input.classed('error', true);
              return;
            }
 
-           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
+           context.background().offset(geoMetersToOffset(d));
+           updateValue();
+         }
 
-           var containerEnter = container.enter().append('div').attr('class', 'restriction-container');
-           containerEnter.append('div').attr('class', 'restriction-help'); // update
+         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);
 
-           _container = containerEnter.merge(container).call(renderViewer);
-           var controls = wrap.selectAll('.restriction-controls').data([0]); // enter/update
+           if (_pointerPrefix === 'pointer') {
+             select(window).on('pointercancel.drag-bg-offset', pointerup);
+           }
 
-           controls.enter().append('div').attr('class', 'restriction-controls-container').append('div').attr('class', 'restriction-controls').merge(controls).call(renderControls);
+           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);
+           }
+
+           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);
+           }
          }
 
-         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
+         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();
+         }
 
-           selection.selectAll('.restriction-distance-input').property('value', _maxDistance).on('input', function () {
-             var val = select(this).property('value');
-             _maxDistance = +val;
-             _intersection = null;
+         context.background().on('change.backgroundOffset-update', updateValue);
+         return section;
+       }
 
-             _container.selectAll('.layer-osm .layer-turns *').remove();
+       function uiSectionOverlayList(context) {
+         var section = uiSection('overlay-list', context).label(_t.html('background.overlays')).disclosureContent(renderDisclosureContent);
 
-             corePreferences('turn-restriction-distance', _maxDistance);
+         var _overlayList = select(null);
 
-             _parent.call(restrictions);
+         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 (description || isOverflowing) {
+               item.call(uiTooltip().placement(placement).title(description || d.name()));
+             }
            });
-           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;
+         function updateLayerSelections(selection) {
+           function active(d) {
+             return context.background().showsLayer(d);
+           }
 
-             _container.selectAll('.layer-osm .layer-turns *').remove();
+           selection.selectAll('li').classed('active', active).call(setTooltips).selectAll('input').property('checked', active);
+         }
 
-             corePreferences('turn-restriction-via-way0', _maxViaWay);
+         function chooseOverlay(d3_event, d) {
+           d3_event.preventDefault();
+           context.background().toggleOverlayLayer(d);
 
-             _parent.call(restrictions);
+           _overlayList.call(updateLayerSelections);
+
+           document.activeElement.blur();
+         }
+
+         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();
            });
-           selection.selectAll('.restriction-via-way-text').html(displayMaxVia(_maxViaWay));
+           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 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);
+         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);
 
-           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
+           _overlayList.call(drawListItems, 'checkbox', chooseOverlay, function (d) {
+             return !d.isHidden() && d.overlay;
+           });
+         }
 
-           var extent = geoExtent();
+         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;
+       }
 
-           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 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;
+       }
 
+       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
 
-           if (_intersection.vertices.length > 1) {
-             var padding = 180; // in z22 pixels
+         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?
 
-             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));
-           }
+             var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
 
-           var padTop = 35; // reserve top space for hint text
+             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');
 
-           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);
+         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 (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 (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'));
+               }
+             }
 
-           if (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
-             _fromWayID = null;
-             _oldTurns = null;
+             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);
+               }
+             }
            }
 
-           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 clickWalkthrough(d3_event) {
+             d3_event.preventDefault();
+             if (context.inIntro()) return;
+             context.container().call(uiIntro(context));
+             context.ui().togglePanes();
+           }
 
-           if (_fromWayID) {
-             way = vgraph.entity(_fromWayID);
-             surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+           function clickShortcuts(d3_event) {
+             d3_event.preventDefault();
+             context.container().call(context.ui().shortcuts, true);
            }
 
-           document.addEventListener('resizeWindow', function () {
-             utilSetDimensions(_container, null);
-             redraw(1);
-           }, false);
-           updateHints(null);
+           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);
+         };
 
-           function click(d3_event) {
-             surface.call(breathe.off).call(breathe);
-             var datum = d3_event.target.__data__;
-             var entity = datum && datum.properties && datum.properties.entity;
+         return helpPane;
+       }
 
-             if (entity) {
-               datum = entity;
-             }
+       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 (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 getOptions() {
+           return {
+             what: corePreferences('validate-what') || 'edited',
+             where: corePreferences('validate-where') || 'all'
+           };
+         } // get and cache the issues to display, unordered
 
-               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
 
-                 datumOnly.only = true; // but change this property
+         function reloadIssues() {
+           _issues = context.validator().getIssuesBySeverity(getOptions())[severity];
+         }
 
-                 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 renderDisclosureContent(selection) {
+           var center = context.map().center();
+           var graph = context.graph(); // sort issues by distance away from the center of the map
 
-                 turns = _intersection.turns(_fromWayID, 2);
-                 extraActions = [];
-                 _oldTurns = [];
+           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
 
-                 for (i = 0; i < turns.length; i++) {
-                   var turn = turns[i];
-                   if (seen[turn.restrictionID]) continue; // avoid deleting the turn twice (#4968, #4928)
 
-                   if (turn.direct && turn.path[1] === datum.path[1]) {
-                     seen[turns[i].restrictionID] = true;
-                     turn.restrictionType = osmInferRestriction(vgraph, turn, projection);
+           issues = issues.slice(0, 1000); //renderIgnoredIssuesReset(_warningsSelection);
 
-                     _oldTurns.push(turn);
+           selection.call(drawIssuesList, issues);
+         }
 
-                     extraActions.push(actionUnrestrictTurn(turn));
-                   }
-                 }
+         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
 
-                 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 = [];
+           items.exit().remove(); // Enter
 
-                 for (i = 0; i < turns.length; i++) {
-                   if (turns[i].key !== datum.key) {
-                     extraActions.push(actionRestrictTurn(turns[i], turns[i].restrictionType));
-                   }
-                 }
+           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
 
-                 _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')]);
-               }
+           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);
+           }
+            // 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();
+               });
+           */
+         }
 
-               context.perform.apply(context, actions); // At this point the datum will be changed, but will have same key..
-               // Refresh it and update the help..
+         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
 
-               var s = surface.selectAll('.' + datum.key);
-               datum = s.empty() ? null : s.datum();
-               updateHints(datum);
-             } else {
-               _fromWayID = null;
-               _oldTurns = null;
-               redraw();
-             }
-           }
 
-           function mouseover(d3_event) {
-             var datum = d3_event.target.__data__;
-             updateHints(datum);
-           }
+             section.reRender();
+           });
+         }, 1000));
+         return section;
+       }
 
-           _lastXPos = _lastXPos || sdims[0];
+       function uiSectionValidationOptions(context) {
+         var section = uiSection('issues-options', context).content(renderContent);
 
-           function redraw(minChange) {
-             var xPos = -1;
+         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 (minChange) {
-               xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
-             }
+         function getOptions() {
+           return {
+             what: corePreferences('validate-what') || 'edited',
+             // 'all', 'edited'
+             where: corePreferences('validate-where') || 'all' // 'all', 'visible'
 
-             if (!minChange || minChange && Math.abs(xPos - _lastXPos) >= minChange) {
-               if (context.hasEntity(_vertexID)) {
-                 _lastXPos = xPos;
+           };
+         }
 
-                 _container.call(renderViewer);
-               }
-             }
+         function updateOptionValue(d3_event, d, val) {
+           if (!val && d3_event && d3_event.target) {
+             val = d3_event.target.value;
            }
 
-           function highlightPathsFrom(wayID) {
-             surface.selectAll('.related').classed('related', false).classed('allow', false).classed('restrict', false).classed('only', false);
-             surface.selectAll('.' + wayID).classed('related', true);
+           corePreferences('validate-' + d, val);
+           context.validator().validate();
+         }
 
-             if (wayID) {
-               var turns = _intersection.turns(wayID, _maxViaWay);
+         return section;
+       }
 
-               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 uiSectionValidationRules(context) {
+         var MINSQUARE = 0;
+         var MAXSQUARE = 20;
+         var DEFAULTSQUARE = 5; // see also unsquare_way.js
 
-                 if (turn.only || turns.length === 1) {
-                   if (turn.via.ways) {
-                     ids = ids.concat(turn.via.ways);
-                   }
-                 } else if (turn.to.way === wayID) {
-                   continue;
-                 }
+         var section = uiSection('issues-rules', context).disclosureContent(renderDisclosureContent).label(_t.html('issues.rules.title'));
 
-                 surface.selectAll(utilEntitySelector(ids)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only');
-               }
-             }
-           }
+         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 updateHints(datum) {
-             var help = _container.selectAll('.restriction-help').html('');
+         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
 
-             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;
+           container = container.merge(containerEnter);
+           container.selectAll('.issue-rules-list').call(drawListItems, _ruleKeys, 'checkbox', 'rule', toggleRule, isRuleEnabled);
+         }
 
-             if (entity) {
-               datum = entity;
-             }
+         function drawListItems(selection, data, type, name, change, active) {
+           var items = selection.selectAll('li').data(data); // Exit
 
-             if (_fromWayID) {
-               way = vgraph.entity(_fromWayID);
-               surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
-             } // Hovering a way
+           items.exit().remove(); // Enter
 
+           var enter = items.enter().append('li');
 
-             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 (name === 'rule') {
+             enter.call(uiTooltip().title(function (d) {
+               return _t.html('issues.' + d + '.tip');
+             }).placement('top'));
+           }
 
-               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: ''
-                 });
-               }
+           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 = {};
 
-               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 (d === 'unsquare_way') {
+               params.val = {
+                 html: '<span class="square-degrees"></span>'
+               };
+             }
 
-               if (datum.via.ways && datum.via.ways.length) {
-                 var names = [];
+             return _t.html('issues.' + d + '.title', params);
+           }); // Update
 
-                 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);
-                 }
+           items = items.merge(enter);
+           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false); // user-configurable square threshold
 
-                 help.append('div') // "VIA {viaNames}"
-                 .html(_t.html('restriction.help.via_names', {
-                   via: placeholders.via,
-                   viaNames: names.join(', ')
-                 }));
-               }
+           var degStr = corePreferences('validate-square-degrees');
 
-               if (!indirect) {
-                 help.append('div') // Click for "No Right Turn"
-                 .html(_t.html('restriction.help.toggle', {
-                   turn: nextText.trim()
-                 }));
-               }
+           if (degStr === null) {
+             degStr = DEFAULTSQUARE.toString();
+           }
 
-               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);
+           var span = items.selectAll('.square-degrees');
+           var input = span.selectAll('.square-degrees-input').data([0]); // enter / update
 
-               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
-                 }));
-               }
+           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);
          }
 
-         function displayMaxDistance(maxDist) {
-           var isImperial = !_mainLocalizer.usesMetric();
-           var opts;
+         function changeSquare() {
+           var input = select(this);
+           var degStr = utilGetSetValue(input).trim();
+           var degNum = parseFloat(degStr, 10);
 
-           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
-               })
-             };
+           if (!isFinite(degNum)) {
+             degNum = DEFAULTSQUARE;
+           } else if (degNum > MAXSQUARE) {
+             degNum = MAXSQUARE;
+           } else if (degNum < MINSQUARE) {
+             degNum = MINSQUARE;
            }
 
-           return _t.html('restriction.controls.distance_up_to', opts);
-         }
+           degNum = Math.round(degNum * 10) / 10; // round to 1 decimal
 
-         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');
+           degStr = degNum.toString();
+           input.property('value', degStr);
+           corePreferences('validate-square-degrees', degStr);
+           context.validator().revalidateUnsquare();
          }
 
-         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 isRuleEnabled(d) {
+           return context.validator().isRuleEnabled(d);
          }
 
-         restrictions.entityIDs = function (val) {
-           _intersection = null;
-           _fromWayID = null;
-           _oldTurns = null;
-           _vertexID = val[0];
-         };
-
-         restrictions.tags = function () {};
-
-         restrictions.focus = function () {};
-
-         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 toggleRule(d3_event, d) {
+           context.validator().toggleRule(d);
+         }
 
-         return utilRebind(restrictions, dispatch$1, 'on');
+         context.validator().on('validated.uiSectionValidationRules', function () {
+           window.requestIdleCallback(section.reRender);
+         });
+         return section;
        }
-       uiFieldRestrictions.supportsMultiselection = false;
-
-       function uiFieldTextarea(field, context) {
-         var dispatch$1 = dispatch('change');
-         var input = select(null);
 
-         var _tags;
+       function uiSectionValidationStatus(context) {
+         var section = uiSection('issues-status', context).content(renderContent).shouldDisplay(function () {
+           var issues = context.validator().getIssues(getOptions());
+           return issues.length === 0;
+         });
 
-         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 getOptions() {
+           return {
+             what: corePreferences('validate-what') || 'edited',
+             where: corePreferences('validate-where') || 'all'
+           };
          }
 
-         function change(onInput) {
-           return function () {
-             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;
-             var t = {};
-             t[field.key] = val || undefined;
-             dispatch$1.call('change', this, t, onInput);
-           };
+         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);
          }
 
-         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);
-         };
+         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
 
-         textarea.focus = function () {
-           input.node().focus();
-         };
+           resetIgnored.exit().remove(); // enter
 
-         return utilRebind(textarea, dispatch$1, 'on');
-       }
+           var resetIgnoredEnter = resetIgnored.enter().append('div').attr('class', 'reset-ignored section-footer');
+           resetIgnoredEnter.append('a').attr('href', '#'); // update
 
-       var getOwnPropertyDescriptor$5 = objectGetOwnPropertyDescriptor.f;
+           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();
+           });
+         }
 
+         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 (hiddenIssues.length) {
+                 selection.select('.box .details').html('').call(_t.append('issues.no_issues.hidden_issues.' + type, {
+                   count: hiddenIssues.length.toString()
+                 }));
+                 return;
+               }
+             }
 
+             selection.select('.box .details').html('').call(_t.append('issues.no_issues.hidden_issues.none'));
+           }
 
+           var messageType;
 
-       var nativeEndsWith = ''.endsWith;
-       var min$a = Math.min;
+           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'
+               }
+             });
+           }
 
-       var CORRECT_IS_REGEXP_LOGIC$1 = correctIsRegexpLogic('endsWith');
-       // 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, 'endsWith');
-         return descriptor && !descriptor.writable;
-       }();
+           if (opts.what === 'edited' && context.history().difference().summary().length === 0) {
+             messageType = 'no_edits';
+           }
 
-       // `String.prototype.endsWith` method
-       // https://tc39.es/ecma262/#sec-string.prototype.endswith
-       _export({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG$1 && !CORRECT_IS_REGEXP_LOGIC$1 }, {
-         endsWith: function endsWith(searchString /* , endPosition = @length */) {
-           var that = String(requireObjectCoercible(this));
-           notARegexp(searchString);
-           var endPosition = arguments.length > 1 ? arguments[1] : undefined;
-           var len = toLength(that.length);
-           var end = endPosition === undefined ? len : min$a(toLength(endPosition), len);
-           var search = String(searchString);
-           return nativeEndsWith
-             ? nativeEndsWith.call(that, search, end)
-             : that.slice(end - search.length, end) === search;
+           selection.select('.box .message').html('').call(_t.append('issues.no_issues.message.' + messageType));
          }
-       });
-
-       function uiFieldWikidata(field, context) {
-         var wikidata = services.wikidata;
-         var dispatch$1 = dispatch('change');
-
-         var _selection = select(null);
-
-         var _searchInput = select(null);
-
-         var _qid = null;
-         var _wikidataEntity = null;
-         var _wikiURL = '';
-         var _entityIDs = [];
-
-         var _wikipediaKey = field.keys && field.keys.find(function (key) {
-           return key.includes('wikipedia');
-         }),
-             _hintKey = field.key === 'wikidata' ? 'name' : field.key.split(':')[0];
 
-         var combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(true).minItems(1);
+         context.validator().on('validated.uiSectionValidationStatus', function () {
+           window.requestIdleCallback(section.reRender);
+         });
+         context.map().on('move.uiSectionValidationStatus', debounce(function () {
+           window.requestIdleCallback(section.reRender);
+         }, 1000));
+         return section;
+       }
 
-         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
+       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;
+       }
 
-           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 uiSettingsCustomData(context) {
+         var dispatch = dispatch$8('change');
 
-         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]);
+         function render(selection) {
+           var dataLayer = context.layers().layer('data'); // keep separate copies of original and current settings
 
-               if (entity.tags[_hintKey]) {
-                 q = entity.tags[_hintKey];
-                 break;
-               }
-             }
-           }
+           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';
 
-           wikidata.itemsForSearchQuery(q, function (err, data) {
-             if (err) return;
+           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 (var i in data) {
-               data[i].value = data[i].label + ' (' + data[i].id + ')';
-               data[i].title = data[i].description;
+             if (files && files.length) {
+               _currSettings.url = '';
+               textSection.select('.field-url').property('value', '');
+               _currSettings.fileList = files;
+             } else {
+               _currSettings.fileList = null;
              }
-
-             if (callback) callback(data);
            });
-         }
-
-         function change() {
-           var syncTags = {};
-           syncTags[field.key] = _qid;
-           dispatch$1.call('change', this, syncTags); // attempt asynchronous update of wikidata tag..
-
-           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.
-
-             if (context.graph() !== initGraph) return;
-             if (!entity.sitelinks) return;
-             var langs = wikidata.languagesToQuery(); // use the label and description languages as fallbacks
-
-             ['labels', 'descriptions'].forEach(function (key) {
-               if (!entity[key]) return;
-               var valueLangs = Object.keys(entity[key]);
-               if (valueLangs.length === 0) return;
-               var valueLang = valueLangs[0];
+           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 (langs.indexOf(valueLang) === -1) {
-                 langs.push(valueLang);
-               }
-             });
-             var newWikipediaValue;
+           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 (_wikipediaKey) {
-               var foundPreferred;
+           function isSaveDisabled() {
+             return null;
+           } // restore the original url
 
-               for (var i in langs) {
-                 var lang = langs[i];
-                 var siteID = lang.replace('-', '_') + 'wiki';
 
-                 if (entity.sitelinks[siteID]) {
-                   foundPreferred = true;
-                   newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title; // use the first match
+           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
 
-                   break;
-                 }
-               }
 
-               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 clickSave() {
+             _currSettings.url = textSection.select('.field-url').property('value').trim(); // one or the other but not both
 
-                 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 (_currSettings.url) {
+               _currSettings.fileList = null;
              }
 
-             if (newWikipediaValue) {
-               newWikipediaValue = context.cleanTagValue(newWikipediaValue);
+             if (_currSettings.fileList) {
+               _currSettings.url = '';
              }
 
-             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
+             corePreferences('settings-custom-data-url', _currSettings.url);
+             this.blur();
+             modal.close();
+             dispatch.call('change', this, _currSettings);
+           }
+         }
 
-               if (newWikipediaValue === null) {
-                 if (!currTags[_wikipediaKey]) return null;
-                 delete currTags[_wikipediaKey];
-               } else {
-                 currTags[_wikipediaKey] = newWikipediaValue;
-               }
+         return utilRebind(render, dispatch, 'on');
+       }
 
-               return actionChangeTags(entityID, currTags);
-             }).filter(Boolean);
-             if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
+       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);
 
-             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
-           });
+         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);
          }
 
-         function setLabelForEntity() {
-           var label = '';
-
-           if (_wikidataEntity) {
-             label = entityPropertyForDisplay(_wikidataEntity, 'labels');
+         function showsLayer(which) {
+           var layer = layers.layer(which);
 
-             if (label.length === 0) {
-               label = _wikidataEntity.id.toString();
-             }
+           if (layer) {
+             return layer.enabled();
            }
 
-           utilGetSetValue(_searchInput, label);
+           return false;
          }
 
-         wiki.tags = function (tags) {
-           var isMixed = Array.isArray(tags[field.key]);
-
-           _searchInput.attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : '').classed('mixed', isMixed);
+         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);
 
-           _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';
+           if (layer) {
+             layer.enabled(enabled);
 
-           if (!/^Q[0-9]*$/.test(_qid)) {
-             // not a proper QID
-             unrecognized();
-             return;
-           } // QID value in correct format
+             if (!enabled && (which === 'osm' || which === 'notes')) {
+               context.enter(modeBrowse(context));
+             }
+           }
+         }
 
+         function toggleLayer(which) {
+           setLayer(which, !showsLayer(which));
+         }
 
-           _wikiURL = 'https://wikidata.org/wiki/' + _qid;
-           wikidata.entityByQID(_qid, function (err, entity) {
-             if (err) {
-               unrecognized();
-               return;
+         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
 
-             _wikidataEntity = entity;
-             setLabelForEntity();
-             var description = entityPropertyForDisplay(entity, 'descriptions');
+           li.merge(liEnter).classed('active', function (d) {
+             return d.layer.enabled();
+           }).selectAll('input').property('checked', function (d) {
+             return d.layer.enabled();
+           });
+         }
 
-             _selection.select('button.wiki-link').classed('disabled', false);
+         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
 
-             _selection.select('.preset-wikidata-description').style('display', function () {
-               return description.length > 0 ? 'flex' : 'none';
-             }).select('input').attr('value', description);
+           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
 
-             _selection.select('.preset-wikidata-identifier').style('display', function () {
-               return entity.id ? 'flex' : 'none';
-             }).select('input').attr('value', entity.id);
-           }); // not a proper QID
 
-           function unrecognized() {
-             _wikidataEntity = null;
-             setLabelForEntity();
+         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..
 
-             _selection.select('.preset-wikidata-description').style('display', 'none');
+           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
 
-             _selection.select('.preset-wikidata-identifier').style('display', 'none');
+           li.merge(liEnter).classed('active', isVTLayerSelected).selectAll('input').property('checked', isVTLayerSelected);
 
-             _selection.select('button.wiki-link').classed('disabled', true);
+           function isVTLayerSelected(d) {
+             return dataLayer && dataLayer.template() === d.template;
+           }
 
-             if (_qid && _qid !== '') {
-               _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
-             } else {
-               _wikiURL = '';
+           function selectVTLayer(d3_event, d) {
+             corePreferences('settings-custom-data-url', d.template);
+
+             if (dataLayer) {
+               dataLayer.template(d.template, d.src);
+               dataLayer.enabled(true);
              }
            }
-         };
+         }
 
-         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
+         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
 
-           var langs = wikidata.languagesToQuery();
+           ul.exit().remove(); // Enter
 
-           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
+           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
 
+           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);
+         }
 
-           return propObj[langKeys[0]].value;
+         function editCustom() {
+           context.container().call(settingsCustomData);
          }
 
-         wiki.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return wiki;
-         };
+         function customChanged(d) {
+           var dataLayer = layers.layer('data');
 
-         wiki.focus = function () {
-           _searchInput.node().focus();
-         };
+           if (d && d.url) {
+             dataLayer.url(d.url);
+           } else if (d && d.fileList) {
+             dataLayer.fileList(d.fileList);
+           }
+         }
+
+         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(wiki, 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;
        }
 
-       function uiFieldWikipedia(field, context) {
-         var _arguments = arguments;
-         var dispatch$1 = dispatch('change');
-         var wikipedia = services.wikipedia;
-         var wikidata = services.wikidata;
+       function uiSectionMapFeatures(context) {
+         var _features = context.features().keys();
 
-         var _langInput = select(null);
+         var section = uiSection('map-features', context).label(_t.html('map_data.map_features')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+
+         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 drawListItems(selection, data, type, name, change, active) {
+           var items = selection.selectAll('li').data(data); // Exit
 
-         var _titleInput = select(null);
+           items.exit().remove(); // Enter
 
-         var _wikiURL = '';
+           var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
+             var tip = _t.html(name + '.' + d + '.tooltip');
 
-         var _entityIDs;
+             if (autoHiddenFeature(d)) {
+               var msg = showsLayer('osm') ? _t.html('map_data.autohidden') : _t.html('map_data.osmhidden');
+               tip += '<div>' + msg + '</div>';
+             }
 
-         var _tags;
+             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
 
-         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 = '';
+           items = items.merge(enter);
+           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', autoHiddenFeature);
+         }
 
-             for (var i in _entityIDs) {
-               var entity = context.hasEntity(_entityIDs[i]);
+         function autoHiddenFeature(d) {
+           return context.features().autoHidden(d);
+         }
 
-               if (entity.tags.name) {
-                 value = entity.tags.name;
-                 break;
-               }
-             }
-           }
+         function showsFeature(d) {
+           return context.features().enabled(d);
+         }
 
-           var searchfn = value.length > 7 ? wikipedia.search : wikipedia.suggestions;
-           searchfn(language()[2], value, function (query, data) {
-             callback(data.map(function (d) {
-               return {
-                 value: d
-               };
-             }));
-           });
-         });
+         function clickFeature(d3_event, d) {
+           context.features().toggle(d);
+         }
 
-         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);
+         function showsLayer(id) {
+           var layer = context.layers().layer(id);
+           return layer && layer.enabled();
+         } // add listeners
 
-           _langInput.on('blur', changeLang).on('change', changeLang);
 
-           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);
+         context.features().on('change.map_features', section.reRender);
+         return section;
+       }
 
-           _titleInput.on('blur', function () {
-             change(true);
-           }).on('change', function () {
-             change(false);
-           });
+       function uiSectionMapStyleOptions(context) {
+         var section = uiSection('fill-area', context).label(_t.html('map_data.style_options')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
 
-           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');
+         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 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
+         function drawListItems(selection, data, type, name, change, active) {
+           var items = selection.selectAll('li').data(data); // Exit
 
-             if (d[2] === langCode) return d;
-           } // fallback to English
+           items.exit().remove(); // Enter
 
+           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
 
-           return skipEnglishFallback ? ['', '', ''] : ['English', 'English', 'en'];
+           items = items.merge(enter);
+           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false);
          }
 
-         function language(skipEnglishFallback) {
-           var value = utilGetSetValue(_langInput).toLowerCase();
+         function isActiveFill(d) {
+           return context.map().activeAreaFill() === d;
+         }
 
-           for (var i in _dataWikipedia) {
-             var d = _dataWikipedia[i]; // return the language already set in the UI, if supported
+         function toggleHighlightEdited(d3_event) {
+           d3_event.preventDefault();
+           context.map().toggleHighlightEdited();
+         }
 
-             if (d[0].toLowerCase() === value || d[1].toLowerCase() === value || d[2] === value) return d;
-           } // fallback to English
+         function setFill(d3_event, d) {
+           context.map().activeAreaFill(d);
+         }
 
+         context.map().on('changeHighlighting.ui_style, changeAreaFill.ui_style', section.reRender);
+         return section;
+       }
 
-           return defaultLanguageInfo(skipEnglishFallback);
-         }
+       function uiSectionPhotoOverlays(context) {
+         var layers = context.layers();
+         var section = uiSection('photo-overlays', context).label(_t.html('photo_overlays.title')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
 
-         function changeLang() {
-           utilGetSetValue(_langInput, language()[1]);
-           change(true);
+         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);
          }
 
-         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];
+         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 syncTags = {};
+           function layerSupported(d) {
+             return d.layer && d.layer.supported();
+           }
 
-           if (langInfo) {
-             var nativeLangName = langInfo[1]; // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization
+           function layerEnabled(d) {
+             return layerSupported(d) && d.layer.enabled();
+           }
 
-             value = decodeURIComponent(m[2]).replace(/_/g, ' ');
+           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 (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.id === 'mapillary-signs' || d.id === 'mapillary-map-features') {
+               classes += ' indented';
+             }
 
-               anchor = decodeURIComponent(m[3]); // }
+             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
 
-               value += '#' + anchor.replace(/_/g, ' ');
-             }
+           li.merge(liEnter).classed('active', layerEnabled).selectAll('input').property('checked', layerEnabled);
+         }
 
-             value = value.slice(0, 1).toUpperCase() + value.slice(1);
-             utilGetSetValue(_langInput, nativeLangName);
-             utilGetSetValue(_titleInput, value);
-           }
+         function drawPhotoTypeItems(selection) {
+           var data = context.photos().allPhotoTypes();
 
-           if (value) {
-             syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
-           } else {
-             syncTags.wikipedia = undefined;
+           function typeEnabled(d) {
+             return context.photos().showsPhotoType(d);
            }
 
-           dispatch$1.call('change', this, syncTags);
-           if (skipWikidata || !value || !language()[2]) return; // attempt asynchronous update of wikidata tag..
+           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
 
-           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.
+           li.merge(liEnter).classed('active', typeEnabled).selectAll('input').property('checked', typeEnabled);
+         }
 
-             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
+         function drawDateFilter(selection) {
+           var data = context.photos().dateFilters();
 
-               if (currTags.wikidata !== value) {
-                 currTags.wikidata = value;
-                 return actionChangeTags(entityID, currTags);
-               }
+           function filterEnabled(d) {
+             return context.photos().dateFilterValue(d);
+           }
 
-               return null;
-             }).filter(Boolean);
-             if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
+           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 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
+             li.selectAll('input').each(function (d) {
+               utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
+             });
            });
+           li = li.merge(liEnter).classed('active', filterEnabled);
          }
 
-         wiki.tags = function (tags) {
-           _tags = tags;
-           updateForTags(tags);
-         };
+         function drawUsernameFilter(selection) {
+           function filterEnabled() {
+             return context.photos().usernames();
+           }
 
-         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 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);
 
-           var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
-           var tagLang = m && m[1];
-           var tagArticleTitle = m && m[2];
-           var anchor = m && m[3];
+           function usernameValue() {
+             var usernames = context.photos().usernames();
+             if (usernames) return usernames.join('; ');
+             return usernames;
+           }
+         }
 
-           var tagLangInfo = tagLang && _dataWikipedia.find(function (d) {
-             return tagLang === d[2];
-           }); // value in correct format
+         function toggleLayer(which) {
+           setLayer(which, !showsLayer(which));
+         }
 
+         function showsLayer(which) {
+           var layer = layers.layer(which);
 
-           if (tagLangInfo) {
-             var nativeLangName = tagLangInfo[1];
-             utilGetSetValue(_langInput, nativeLangName);
-             utilGetSetValue(_titleInput, tagArticleTitle + (anchor ? '#' + anchor : ''));
+           if (layer) {
+             return layer.enabled();
+           }
 
-             if (anchor) {
-               try {
-                 // Best-effort `anchorencode:` implementation
-                 anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
-               } catch (e) {
-                 anchor = anchor.replace(/ /g, '_');
-               }
-             }
+           return false;
+         }
 
-             _wikiURL = 'https://' + tagLang + '.wikipedia.org/wiki/' + tagArticleTitle.replace(/ /g, '_') + (anchor ? '#' + anchor : ''); // unrecognized value format
-           } else {
-             utilGetSetValue(_titleInput, value);
+         function setLayer(which, enabled) {
+           var layer = layers.layer(which);
 
-             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 = '';
-             }
+           if (layer) {
+             layer.enabled(enabled);
            }
          }
 
-         wiki.entityIDs = function (val) {
-           if (!_arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return wiki;
-         };
+         context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
+         context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
+         return section;
+       }
 
-         wiki.focus = function () {
-           _titleInput.node().focus();
-         };
+       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;
+       }
 
-         return utilRebind(wiki, dispatch$1, 'on');
+       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;
        }
-       uiFieldWikipedia.supportsMultiselection = false;
 
-       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
-       };
+       function uiInit(context) {
+         var _initCounter = 0;
+         var _needWidth = {};
 
-       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
+         var _lastPointerType;
 
-         field.domId = utilUniqueDomId('form-field-' + field.safeid);
-         var _show = options.show;
-         var _state = '';
-         var _tags = {};
-         var _locked = false;
+         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 _lockedTip = uiTooltip().title(_t.html('inspector.lock.suggestion', {
-           label: field.label
-         })).placement('bottom');
+             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
 
-         field.keys = field.keys || [field.key]; // only create the fields that are actually being shown
+             d3_event.preventDefault();
+           });
+           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) {
+             // 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 ('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');
+           }
+
+           container.attr('lang', _mainLocalizer.localeCode()).attr('dir', _mainLocalizer.textDirection()); // setup fullscreen keybindings (no button shown at this time)
+
+           container.call(uiFullScreen(context));
+           var map = context.map();
+           map.redrawEnable(false); // don't draw until we've set zoom/lat/long
+
+           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.
 
-         if (_show && !field.impl) {
-           createField();
-         } // Creates the field.. This is done lazily,
-         // once we know that the field will be shown.
+           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
 
+           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()
 
-         function createField() {
-           field.impl = uiFields[field.type](field, context).on('change', function (t, onInput) {
-             dispatch$1.call('change', field, t, onInput);
+           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 (entityIDs) {
-             field.entityIDs = entityIDs; // if this field cares about the entities, pass them along
+           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();
 
-             if (field.impl.entityIDs) {
-               field.impl.entityIDs(entityIDs);
-             }
+           if (apiConnections && apiConnections.length > 1) {
+             aboutList.append('li').attr('class', 'source-switch').call(uiSourceSwitch(context).keys(apiConnections));
            }
-         }
-
-         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 tagsContainFieldKey() {
-           return field.keys.some(function (key) {
-             if (field.type === 'multiCombo') {
-               for (var tagKey in _tags) {
-                 if (tagKey.indexOf(key) === 0) {
-                   return true;
-                 }
-               }
+           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));
 
-               return false;
-             }
+           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.
 
-             return _tags[key] !== undefined;
-           });
-         }
 
-         function revert(d3_event, d) {
-           d3_event.stopPropagation();
-           d3_event.preventDefault();
-           if (!entityIDs || _locked) return;
-           dispatch$1.call('revert', d, d.keys);
-         }
+           ui.onResize();
+           map.redrawEnable(true);
+           ui.hash = behaviorHash(context);
+           ui.hash();
 
-         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);
-         }
+           if (!ui.hash.hadHash) {
+             map.centerZoom([0, 0], 2);
+           } // Bind events
 
-         field.render = function (selection) {
-           var container = selection.selectAll('.form-field').data([field]); // Enter
 
-           var enter = container.enter().append('div').attr('class', function (d) {
-             return 'form-field form-field-' + d.safeid;
-           }).classed('nowrap', !options.wrap);
+           window.onbeforeunload = function () {
+             return context.save();
+           };
 
-           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');
+           window.onunload = function () {
+             context.history().unlock();
+           };
 
-             if (options.remove) {
-               labelEnter.append('button').attr('class', 'remove-icon').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete'));
+           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();
              }
 
-             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'));
+             var previousBackground = context.background().findSource(corePreferences('background-last-used-toggle'));
+
+             if (previousBackground) {
+               var currentBackground = context.background().baseLayerSource();
+               corePreferences('background-last-used-toggle', currentBackground.id);
+               corePreferences('background-last-used', previousBackground.id);
+               context.background().baseLayerSource(previousBackground);
              }
-           } // Update
+           }).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 mode = context.mode();
+             if (mode && /^draw/.test(mode.id)) return;
+             var layer = context.layers().layer('osm');
 
-           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);
+             if (layer) {
+               layer.enabled(!layer.enabled());
 
-             if (!d.impl) {
-               createField();
+               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));
 
-             var reference, help; // instantiate field help
+           if (!_initCounter++) {
+             if (!ui.hash.startWalkthrough) {
+               context.container().call(uiSplash(context)).call(uiRestore(context));
+             }
 
-             if (options.wrap && field.type === 'restrictions') {
-               help = uiFieldHelp(context, 'restrictions');
-             } // instantiate tag reference
+             context.container().call(ui.shortcuts);
+           }
 
+           var osm = context.connection();
+           var auth = uiLoading(context).message(_t.html('loading_auth')).blocking(true);
 
-             if (options.wrap && options.info) {
-               var referenceKey = d.key || '';
+           if (osm && auth) {
+             osm.on('authLoading.ui', function () {
+               context.container().call(auth);
+             }).on('authDone.ui', function () {
+               auth.close();
+             });
+           }
 
-               if (d.type === 'multiCombo') {
-                 // lookup key without the trailing ':'
-                 referenceKey = referenceKey.replace(/:$/, '');
-               }
+           _initCounter++;
 
-               reference = uiTagReference(d.reference || {
-                 key: referenceKey
-               });
+           if (ui.hash.startWalkthrough) {
+             ui.hash.startWalkthrough = false;
+             context.container().call(uiIntro(context));
+           }
 
-               if (_state === 'hover') {
-                 reference.showing(false);
-               }
-             }
+           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);
+             };
+           }
+         }
 
-             selection.call(d.impl); // add field help components
+         var ui = {};
 
-             if (help) {
-               selection.call(help.body).select('.field-label').call(help.button);
-             } // add tag reference components
+         var _loadPromise; // renders the iD interface into the container node
 
 
-             if (reference) {
-               selection.call(reference.body).select('.field-label').call(reference.button);
-             }
+         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.
 
-             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 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);
+         ui.restart = function () {
+           context.keybinding().clear();
+           _loadPromise = null;
+           context.container().selectAll('*').remove();
+           ui.ensureLoaded();
          };
 
-         field.state = function (val) {
-           if (!arguments.length) return _state;
-           _state = val;
-           return field;
+         ui.lastPointerType = function () {
+           return _lastPointerType;
          };
 
-         field.tags = function (val) {
-           if (!arguments.length) return _tags;
-           _tags = val;
+         ui.svgDefs = svgDefs(context);
+         ui.flash = uiFlash(context);
+         ui.sidebar = uiSidebar(context);
+         ui.photoviewer = uiPhotoviewer(context);
+         ui.shortcuts = uiShortcuts(context);
 
-           if (tagsContainFieldKey() && !_show) {
-             // always show a field if it has a value to display
-             _show = true;
+         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.
 
-             if (!field.impl) {
-               createField();
-             }
+           var mapDimensions = utilGetDimensions(context.container().select('.main-content'), true);
+           utilGetDimensions(context.container().select('.sidebar'), true);
+
+           if (withPan !== undefined) {
+             map.redrawEnable(false);
+             map.pan(withPan);
+             map.redrawEnable(true);
            }
 
-           return field;
-         };
+           map.dimensions(mapDimensions);
+           ui.photoviewer.onMapResize(); // check if header or footer have overflowed
 
-         field.locked = function (val) {
-           if (!arguments.length) return _locked;
-           _locked = val;
-           return field;
-         };
+           ui.checkOverflow('.top-toolbar');
+           ui.checkOverflow('.map-footer-bar'); // Use outdated code so it works on Explorer
 
-         field.show = function () {
-           _show = true;
+           var resizeWindowEvent = document.createEvent('Event');
+           resizeWindowEvent.initEvent('resizeWindow', true, true);
+           document.dispatchEvent(resizeWindowEvent);
+         }; // Call checkOverflow when resizing or whenever the contents change.
 
-           if (!field.impl) {
-             createField();
-           }
 
-           if (field["default"] && field.key && _tags[field.key] !== field["default"]) {
-             var t = {};
-             t[field.key] = field["default"];
-             dispatch$1.call('change', this, t);
+         ui.checkOverflow = function (selector, reset) {
+           if (reset) {
+             delete _needWidth[selector];
            }
-         }; // A shown field has a visible UI, a non-shown field is in the 'Add field' dropdown
-
 
-         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 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);
 
-         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 (!_needWidth[selector]) {
+               _needWidth[selector] = scrollWidth;
+             }
+           } else if (scrollWidth >= needed) {
+             selection.classed('narrow', false);
+           }
+         };
 
-           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();
+         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 (field.countryCodes && field.countryCodes.indexOf(countryCode) === -1) {
-               return 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 (field.notCountryCodes && field.notCountryCodes.indexOf(countryCode) !== -1) {
-               return 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);
+             });
            }
+         };
 
-           var prerequisiteTag = field.prerequisiteTag;
-
-           if (entityIDs && !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
-           prerequisiteTag) {
-             if (!entityIDs.every(function (entityID) {
-               var entity = context.graph().entity(entityID);
+         var _editMenu = uiEditMenu(context);
 
-               if (prerequisiteTag.key) {
-                 var value = entity.tags[prerequisiteTag.key];
-                 if (!value) return false;
+         ui.editMenu = function () {
+           return _editMenu;
+         };
 
-                 if (prerequisiteTag.valueNot) {
-                   return prerequisiteTag.valueNot !== value;
-                 }
+         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
 
-                 if (prerequisiteTag.value) {
-                   return prerequisiteTag.value === value;
-                 }
-               } else if (prerequisiteTag.keyNot) {
-                 if (entity.tags[prerequisiteTag.keyNot]) return false;
-               }
+           if (!context.map().editableDataEnabled()) return;
+           var surfaceNode = context.surface().node();
 
-               return true;
-             })) return false;
+           if (surfaceNode.focus) {
+             // FF doesn't support it
+             // focus the surface or else clicking off the menu may not trigger modeBrowse
+             surfaceNode.focus();
            }
 
-           return true;
-         };
+           operations.forEach(function (operation) {
+             if (operation.point) operation.point(anchorPoint);
+           });
 
-         field.focus = function () {
-           if (field.impl) {
-             field.impl.focus();
-           }
+           _editMenu.anchorLoc(anchorPoint).triggerType(triggerType).operations(operations); // render the menu
+
+
+           context.map().supersurface.call(_editMenu);
          };
 
-         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());
-         }
+         ui.closeEditMenu = function () {
+           // remove any existing menu no matter how it was added
+           context.map().supersurface.select('.edit-menu').remove();
+         };
 
-         return utilRebind(field, dispatch$1, 'on');
-       }
+         var _saveLoading = select(null);
 
-       function uiFormFields(context) {
-         var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
-         var _fieldsArr = [];
-         var _lastPlaceholder = '';
-         var _state = '';
-         var _klass = '';
+         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();
 
-         function formFields(selection) {
-           var allowedFields = _fieldsArr.filter(function (field) {
-             return field.isAllowed();
-           });
+           _saveLoading = select(null);
+         });
+         return ui;
+       }
 
-           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
+       function coreContext() {
+         var _this = this;
 
-           var enter = fields.enter().append('div').attr('class', function (d) {
-             return 'wrap-form-field wrap-form-field-' + d.safeid;
-           }); // Update
+         var dispatch = dispatch$8('enter', 'exit', 'change');
+         var context = utilRebind({}, dispatch, 'on');
 
-           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').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 _deferred = new Set();
 
-             var field = d.field;
-             field.show();
-             selection.call(formFields); // rerender
+         context.version = '2.20.4';
+         context.privacyVersion = '20201202'; // iD will alter the hash so cache the parameters intended to setup the session
 
-             field.focus();
-           })); // avoid updating placeholder excessively (triggers style recalc)
+         context.initialHashParams = window.location.hash ? utilStringQs(window.location.hash) : {};
+         /* Changeset */
+         // An osmChangeset object. Not loaded until needed.
 
-           if (_lastPlaceholder !== placeholder) {
-             input.attr('placeholder', placeholder);
-             _lastPlaceholder = placeholder;
-           }
-         }
+         context.changeset = null;
+         var _defaultChangesetComment = context.initialHashParams.comment;
+         var _defaultChangesetSource = context.initialHashParams.source;
+         var _defaultChangesetHashtags = context.initialHashParams.hashtags;
 
-         formFields.fieldsArr = function (val) {
-           if (!arguments.length) return _fieldsArr;
-           _fieldsArr = val || [];
-           return formFields;
+         context.defaultChangesetComment = function (val) {
+           if (!arguments.length) return _defaultChangesetComment;
+           _defaultChangesetComment = val;
+           return context;
          };
 
-         formFields.state = function (val) {
-           if (!arguments.length) return _state;
-           _state = val;
-           return formFields;
+         context.defaultChangesetSource = function (val) {
+           if (!arguments.length) return _defaultChangesetSource;
+           _defaultChangesetSource = val;
+           return context;
          };
 
-         formFields.klass = function (val) {
-           if (!arguments.length) return _klass;
-           _klass = val;
-           return formFields;
+         context.defaultChangesetHashtags = function (val) {
+           if (!arguments.length) return _defaultChangesetHashtags;
+           _defaultChangesetHashtags = val;
+           return context;
          };
+         /* Document title */
 
-         return formFields;
-       }
+         /* (typically shown as the label for the browser window/tab) */
+         // If true, iD will update the title based on what the user is doing
 
-       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;
+         var _setsDocumentTitle = true;
 
-         var _fieldsArr;
+         context.setsDocumentTitle = function (val) {
+           if (!arguments.length) return _setsDocumentTitle;
+           _setsDocumentTitle = val;
+           return context;
+         }; // The part of the title that is always the same
 
-         var _presets = [];
 
-         var _tags;
+         var _documentTitleBase = document.title;
 
-         var _entityIDs;
+         context.documentTitleBase = function (val) {
+           if (!arguments.length) return _documentTitleBase;
+           _documentTitleBase = val;
+           return context;
+         };
+         /* User interface and keybinding */
 
-         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;
 
-             _presets.forEach(function (preset) {
-               var fields = preset.fields();
-               var moreFields = preset.moreFields();
-               allFields = utilArrayUnion(allFields, fields);
-               allMoreFields = utilArrayUnion(allMoreFields, moreFields);
+         var _ui;
 
-               if (!sharedTotalFields) {
-                 sharedTotalFields = utilArrayUnion(fields, moreFields);
-               } else {
-                 sharedTotalFields = sharedTotalFields.filter(function (field) {
-                   return fields.indexOf(field) !== -1 || moreFields.indexOf(field) !== -1;
-                 });
-               }
-             });
+         context.ui = function () {
+           return _ui;
+         };
 
-             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.lastPointerType = function () {
+           return _ui.lastPointerType();
+         };
 
-             if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
-               _fieldsArr.push(uiField(context, presetsManager.field('restrictions'), _entityIDs));
-             }
+         var _keybinding = utilKeybinding('context');
 
-             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.keybinding = function () {
+           return _keybinding;
+         };
 
-             _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);
-               });
-             });
-           }
+         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`
 
-           _fieldsArr.forEach(function (field) {
-             field.state(_state).tags(_tags);
-           });
+         var _connection = services.osm;
 
-           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));
-             }
-           });
-         }
+         var _history;
 
-         section.presets = function (val) {
-           if (!arguments.length) return _presets;
+         var _validator;
 
-           if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
-             _presets = val;
-             _fieldsArr = null;
-           }
+         var _uploader;
 
-           return section;
+         context.connection = function () {
+           return _connection;
          };
 
-         section.state = function (val) {
-           if (!arguments.length) return _state;
-           _state = val;
-           return section;
+         context.history = function () {
+           return _history;
          };
 
-         section.tags = function (val) {
-           if (!arguments.length) return _tags;
-           _tags = val; // Don't reset _fieldsArr here.
+         context.validator = function () {
+           return _validator;
+         };
 
-           return section;
+         context.uploader = function () {
+           return _uploader;
          };
+         /* Connection */
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
 
-           if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
-             _entityIDs = val;
-             _fieldsArr = null;
+         context.preauth = function (options) {
+           if (_connection) {
+             _connection["switch"](options);
            }
 
-           return section;
+           return context;
          };
+         /* connection options for source switcher (optional) */
 
-         return utilRebind(section, dispatch$1, '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('inspector.title_count', {
-             title: _t.html('inspector.members'),
-             count: count
-           });
-         }).disclosureContent(renderDisclosureContent);
-         var taginfo = services.taginfo;
 
-         var _entityIDs;
+         var _apiConnections;
 
-         var _maxMembers = 1000;
+         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
 
-         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();
-           });
-         }
+         context.locale = function (locale) {
+           if (!arguments.length) return _mainLocalizer.localeCode();
+           _mainLocalizer.preferredLocaleCodes(locale);
+           return context;
+         };
 
-         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 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();
+                 }
+               }
 
-           utilHighlightEntities([d.id], true, context);
-         }
+               if (typeof callback === 'function') {
+                 callback(err);
+               }
 
-         function selectMember(d3_event, d) {
-           d3_event.preventDefault(); // remove the hover-highlight styling
+               return;
+             } else if (_connection && _connection.getConnectionId() !== cid) {
+               if (typeof callback === 'function') {
+                 callback({
+                   message: 'Connection Switched',
+                   status: -1
+                 });
+               }
 
-           utilHighlightEntities([d.id], false, context);
-           var entity = context.entity(d.id);
-           var mapExtent = context.map().extent();
+               return;
+             } else {
+               _history.merge(result.data, result.extent);
 
-           if (!entity.intersects(mapExtent, context.graph())) {
-             // zoom to the entity if its extent is not visible now
-             context.map().zoomToEase(entity);
-           }
+               if (typeof callback === 'function') {
+                 callback(err, result);
+               }
 
-           context.enter(modeSelect(context, [d.id]));
+               return;
+             }
+           };
          }
 
-         function changeRole(d3_event, d) {
-           var oldRole = d.role;
-           var newRole = context.cleanRelationRole(select(this).property('value'));
+         context.loadTiles = function (projection, callback) {
+           var handle = window.requestIdleCallback(function () {
+             _deferred["delete"](handle);
 
-           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();
-           }
-         }
+             if (_connection && context.editableDataEnabled()) {
+               var cid = _connection.getConnectionId();
 
-         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
-           }));
+               _connection.loadTiles(projection, afterLoad(cid, callback));
+             }
+           });
 
-           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();
-           }
-         }
+           _deferred.add(handle);
+         };
 
-         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);
+         context.loadTileAtLoc = function (loc, callback) {
+           var handle = window.requestIdleCallback(function () {
+             _deferred["delete"](handle);
 
-             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);
+             if (_connection && context.editableDataEnabled()) {
+               var cid = _connection.getConnectionId();
+
+               _connection.loadTileAtLoc(loc, afterLoad(cid, callback));
              }
            });
-           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);
 
-           if (taginfo) {
-             wrapEnter.each(bindTypeahead);
-           } // update
+           _deferred.add(handle);
+         }; // Download the full entity and its parent relations. The callback may be called multiple times.
 
 
-           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();
+         context.loadEntity = function (entityID, callback) {
+           if (_connection) {
+             var cid = _connection.getConnectionId();
 
-               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;
-                 }
+             _connection.loadEntity(entityID, afterLoad(cid, callback)); // We need to fetch the parent relations separately.
 
-                 return 'translateY(-100%)';
-               } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
-                 if (targetIndex === null || index2 < targetIndex) {
-                   targetIndex = index2;
-                 }
 
-                 return 'translateY(100%)';
-               }
+             _connection.loadEntityRelations(entityID, afterLoad(cid, callback));
+           }
+         };
 
-               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);
+         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;
 
-             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();
+             if (zoomTo !== false) {
+               var entity = result.data.find(function (e) {
+                 return e.id === entityID;
+               });
+
+               if (entity) {
+                 _map.zoomTo(entity);
+               }
              }
-           }));
+           });
 
-           function bindTypeahead(d) {
-             var row = select(this);
-             var role = row.selectAll('input.member-role');
-             var origValue = role.property('value');
+           _map.on('drawn.zoomToEntity', function () {
+             if (!context.hasEntity(entityID)) return;
 
-             function sort(value, data) {
-               var sameletter = [];
-               var other = [];
+             _map.on('drawn.zoomToEntity', null);
 
-               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.on('enter.zoomToEntity', null);
+             context.enter(modeSelect(context, [entityID]));
+           });
 
-               return sameletter.concat(other);
+           context.on('enter.zoomToEntity', function () {
+             if (_mode.id !== 'browse') {
+               _map.on('drawn.zoomToEntity', null);
+
+               context.on('enter.zoomToEntity', null);
              }
+           });
+         };
 
-             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;
+         var _minEditableZoom = 16;
 
-               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';
-               }
+         context.minEditableZoom = function (val) {
+           if (!arguments.length) return _minEditableZoom;
+           _minEditableZoom = val;
 
-               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);
-             }));
+           if (_connection) {
+             _connection.tileZoom(val);
            }
 
-           function unbind() {
-             var row = select(this);
-             row.selectAll('input.member-role').call(uiCombobox.off, context);
-           }
-         }
+           return context;
+         }; // String length limits in Unicode characters, not JavaScript UTF-16 code units
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return section;
+
+         context.maxCharsForTagKey = function () {
+           return 255;
          };
 
-         return section;
-       }
+         context.maxCharsForTagValue = function () {
+           return 255;
+         };
 
-       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.maxCharsForRelationRole = function () {
+           return 255;
+         };
+
+         function cleanOsmString(val, maxChars) {
+           // be lenient with input
+           if (val === undefined || val === null) {
+             val = '';
+           } else {
+             val = val.toString();
+           } // remove whitespace
 
-           for (var i in memberIndexes) {
-             graph = actionDeleteMember(relationId, memberIndexes[i])(graph);
-           }
 
-           return graph;
-         };
-       }
+           val = val.trim(); // use the canonical form of the string
 
-       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 = [];
+           if (val.normalize) val = val.normalize('NFC'); // trim to the number of allowed characters
 
-         var _showBlank;
+           return utilUnicodeCharsTruncated(val, maxChars);
+         }
 
-         var _maxMemberships = 1000;
+         context.cleanTagKey = function (val) {
+           return cleanOsmString(val, context.maxCharsForTagKey());
+         };
 
-         function getSharedParentRelations() {
-           var parents = [];
+         context.cleanTagValue = function (val) {
+           return cleanOsmString(val, context.maxCharsForTagValue());
+         };
 
-           for (var i = 0; i < _entityIDs.length; i++) {
-             var entity = context.graph().hasEntity(_entityIDs[i]);
-             if (!entity) continue;
+         context.cleanRelationRole = function (val) {
+           return cleanOsmString(val, context.maxCharsForRelationRole());
+         };
+         /* History */
 
-             if (i === 0) {
-               parents = context.graph().parentRelations(entity);
-             } else {
-               parents = utilArrayIntersection(parents, context.graph().parentRelations(entity));
-             }
 
-             if (!parents.length) break;
-           }
+         var _inIntro = false;
 
-           return parents;
-         }
+         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
 
-         function getMemberships() {
-           var memberships = [];
-           var relations = getSharedParentRelations().slice(0, _maxMemberships);
-           var isMultiselect = _entityIDs.length > 1;
-           var i, relation, membership, index, member, indexedMember;
 
-           for (i = 0; i < relations.length; i++) {
-             relation = relations[i];
-             membership = {
-               relation: relation,
-               members: [],
-               hash: osmEntity.key(relation)
-             };
+         context.save = function () {
+           // no history save, no message onbeforeunload
+           if (_inIntro || context.container().select('.modal').size()) return;
+           var canSave;
 
-             for (index = 0; index < relation.members.length; index++) {
-               member = relation.members[index];
+           if (_mode && _mode.id === 'save') {
+             canSave = false; // Attempt to prevent user from creating duplicate changes - see #5200
 
-               if (_entityIDs.indexOf(member.id) !== -1) {
-                 indexedMember = Object.assign({}, member, {
-                   index: index
-                 });
-                 membership.members.push(indexedMember);
-                 membership.hash += ',' + index.toString();
+             if (services.osm && services.osm.isChangesetInflight()) {
+               _history.clearSaved();
 
-                 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)
-                   };
-                 }
-               }
+               return;
              }
+           } else {
+             canSave = context.selectedIDs().every(function (id) {
+               var entity = context.hasEntity(id);
+               return entity && !entity.isDegenerate();
+             });
+           }
 
-             if (membership.members.length) memberships.push(membership);
+           if (canSave) {
+             _history.save();
            }
 
-           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;
-         }
+           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).
 
-         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]));
+         context.debouncedSave = debounce(context.save, 350);
+
+         function withDebouncedSave(fn) {
+           return function () {
+             var result = fn.apply(_history, arguments);
+             context.debouncedSave();
+             return result;
+           };
          }
+         /* Graph */
 
-         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
 
-           utilHighlightEntities([d.relation.id], true, context);
-         }
+         context.hasEntity = function (id) {
+           return _history.graph().hasEntity(id);
+         };
 
-         function changeRole(d3_event, d) {
-           if (d === 0) return; // called on newrow (shouldn't happen)
+         context.entity = function (id) {
+           return _history.graph().entity(id);
+         };
+         /* Modes */
 
-           if (_inChange) return; // avoid accidental recursive call #5731
 
-           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;
-           });
+         var _mode;
 
-           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();
-           }
+         context.mode = function () {
+           return _mode;
+         };
 
-           _inChange = false;
-         }
+         context.enter = function (newMode) {
+           if (_mode) {
+             _mode.exit();
 
-         function addMembership(d, role) {
-           this.blur(); // avoid keeping focus on the button
+             dispatch.call('exit', _this, _mode);
+           }
 
-           _showBlank = false;
+           _mode = newMode;
 
-           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);
-               }
+           _mode.enter();
 
-               return graph;
-             };
-           }
+           dispatch.call('enter', _this, _mode);
+         };
 
-           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.selectedIDs = function () {
+           return _mode && _mode.selectedIDs && _mode.selectedIDs() || [];
+         };
 
-             context.enter(modeSelect(context, [relation.id]).newFeature(true));
-           }
-         }
+         context.activeID = function () {
+           return _mode && _mode.activeID && _mode.activeID();
+         };
 
-         function deleteMembership(d3_event, d) {
-           this.blur(); // avoid keeping focus on the button
+         var _selectedNoteID;
 
-           if (d === 0) return; // called on newrow (shouldn't happen)
-           // remove the hover-highlight styling
+         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.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();
+         var _selectedErrorID;
 
-           function baseDisplayLabel(entity) {
-             var matched = _mainPresetIndex.match(entity, graph);
-             var presetName = matched && matched.name() || _t('inspector.relation');
-             var entityName = utilDisplayName(entity) || '';
-             return presetName + ' ' + entityName;
-           }
+         context.selectedErrorID = function (errorID) {
+           if (!arguments.length) return _selectedErrorID;
+           _selectedErrorID = errorID;
+           return context;
+         };
+         /* Behaviors */
 
-           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
+         context.install = function (behavior) {
+           return context.surface().call(behavior);
+         };
 
-             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;
-               });
-             });
-           }
+         context.uninstall = function (behavior) {
+           return context.surface().call(behavior.off);
+         };
+         /* Copy/Paste */
 
-           result.forEach(function (obj) {
-             obj.title = obj.value;
-           });
-           result.unshift(newRelation);
-           callback(result);
-         }
 
-         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
+         var _copyGraph;
 
-           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
+         context.copyGraph = function () {
+           return _copyGraph;
+         };
 
-           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);
+         var _copyIDs = [];
 
-           if (taginfo) {
-             wrapEnter.each(bindTypeahead);
-           }
+         context.copyIDs = function (val) {
+           if (!arguments.length) return _copyIDs;
+           _copyIDs = val;
+           _copyGraph = _history.graph();
+           return context;
+         };
 
-           var newMembership = list.selectAll('.member-row-new').data(_showBlank ? [0] : []); // Exit
+         var _copyLonLat;
 
-           newMembership.exit().remove(); // Enter
+         context.copyLonLat = function (val) {
+           if (!arguments.length) return _copyLonLat;
+           _copyLonLat = val;
+           return context;
+         };
+         /* Background */
 
-           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
 
-           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 _background;
 
-           var addRow = selection.selectAll('.add-row').data([0]); // enter
+         context.background = function () {
+           return _background;
+         };
+         /* Features */
 
-           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
 
-           addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
-           // update
+         var _features;
 
-           addRow = addRow.merge(addRowEnter);
-           addRow.select('.add-relation').on('click', function () {
-             _showBlank = true;
-             section.reRender();
-             list.selectAll('.member-entity-input').node().focus();
-           });
+         context.features = function () {
+           return _features;
+         };
 
-           function acceptEntity(d) {
-             if (!d) {
-               cancelEntity();
-               return;
-             } // remove hover-higlighting
+         context.hasHiddenConnections = function (id) {
+           var graph = _history.graph();
 
+           var entity = graph.entity(id);
+           return _features.hasHiddenConnections(entity, graph);
+         };
+         /* Photos */
 
-             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 cancelEntity() {
-             var input = newMembership.selectAll('.member-entity-input');
-             input.property('value', ''); // remove hover-higlighting
+         var _photos;
 
-             context.surface().selectAll('.highlighted').classed('highlighted', false);
-           }
+         context.photos = function () {
+           return _photos;
+         };
+         /* Map */
 
-           function bindTypeahead(d) {
-             var row = select(this);
-             var role = row.selectAll('input.member-role');
-             var origValue = role.property('value');
 
-             function sort(value, data) {
-               var sameletter = [];
-               var other = [];
+         var _map;
 
-               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.map = function () {
+           return _map;
+         };
 
-               return sameletter.concat(other);
-             }
+         context.layers = function () {
+           return _map.layers();
+         };
 
-             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);
-             }));
-           }
+         context.surface = function () {
+           return _map.surface;
+         };
 
-           function unbind() {
-             var row = select(this);
-             row.selectAll('input.member-role').call(uiCombobox.off, context);
-           }
-         }
+         context.editableDataEnabled = function () {
+           return _map.editableDataEnabled();
+         };
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           _showBlank = false;
-           return section;
+         context.surfaceRect = function () {
+           return _map.surface.node().getBoundingClientRect();
          };
 
-         return section;
-       }
+         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 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
-           });
-         }).disclosureContent(renderDisclosureContent);
-         context.history().on('change.selectionList', function (difference) {
-           if (difference) {
-             section.reRender();
-           }
-         });
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _selectedIDs;
-           _selectedIDs = val;
-           return section;
+         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
+
+         };
+
+         context.debugFlags = function () {
+           return _debugFlags;
          };
 
-         function selectEntity(d3_event, entity) {
-           context.enter(modeSelect(context, [entity.id]));
-         }
+         context.getDebug = function (flag) {
+           return flag && _debugFlags[flag];
+         };
 
-         function deselectEntity(d3_event, entity) {
-           var selectedIDs = _selectedIDs.slice();
+         context.setDebug = function (flag, val) {
+           if (arguments.length === 1) val = true;
+           _debugFlags[flag] = val;
+           dispatch.call('change');
+           return context;
+         };
+         /* Container */
 
-           var index = selectedIDs.indexOf(entity.id);
 
-           if (index > -1) {
-             selectedIDs.splice(index, 1);
-             context.enter(modeSelect(context, selectedIDs));
-           }
-         }
+         var _container = select(null);
 
-         function renderDisclosureContent(selection) {
-           var list = selection.selectAll('.feature-list').data([0]);
-           list = list.enter().append('ul').attr('class', 'feature-list').merge(list);
+         context.container = function (val) {
+           if (!arguments.length) return _container;
+           _container = val;
 
-           var entities = _selectedIDs.map(function (id) {
-             return context.hasEntity(id);
-           }).filter(Boolean);
+           _container.classed('ideditor', true);
 
-           var items = list.selectAll('.feature-list-item').data(entities, osmEntity.key);
-           items.exit().remove(); // Enter
+           return context;
+         };
 
-           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.containerNode = function (val) {
+           if (!arguments.length) return context.container().node();
+           context.container(select(val));
+           return context;
+         };
 
-           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);
-           });
-         }
+         var _embed;
 
-         return section;
-       }
+         context.embed = function (val) {
+           if (!arguments.length) return _embed;
+           _embed = val;
+           return context;
+         };
+         /* Assets */
 
-       function uiEntityEditor(context) {
-         var dispatch$1 = dispatch('choose');
-         var _state = 'select';
-         var _coalesceChanges = false;
-         var _modified = false;
 
-         var _base;
+         var _assetPath = '';
 
-         var _entityIDs;
+         context.assetPath = function (val) {
+           if (!arguments.length) return _assetPath;
+           _assetPath = val;
+           _mainFileFetcher.assetPath(val);
+           return context;
+         };
 
-         var _activePresets = [];
+         var _assetMap = {};
 
-         var _newFeature;
+         context.assetMap = function (val) {
+           if (!arguments.length) return _assetMap;
+           _assetMap = val;
+           _mainFileFetcher.assetMap(val);
+           return context;
+         };
 
-         var _sections;
+         context.asset = function (val) {
+           if (/^http(s)?:\/\//i.test(val)) return val;
+           var filename = _assetPath + val;
+           return _assetMap[filename] || filename;
+         };
 
-         function entityEditor(selection) {
-           var combinedTags = utilCombinedTags(_entityIDs, context.graph()); // Header
+         context.imagePath = function (val) {
+           return context.asset("img/".concat(val));
+         };
+         /* reset (aka flush) */
 
-           var header = selection.selectAll('.header').data([0]); // Enter
 
-           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
+         context.reset = context.flush = function () {
+           context.debouncedSave.cancel();
+           Array.from(_deferred).forEach(function (handle) {
+             window.cancelIdleCallback(handle);
 
-           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
+             _deferred["delete"](handle);
+           });
+           Object.values(services).forEach(function (service) {
+             if (service && typeof service.reset === 'function') {
+               service.reset(context);
+             }
+           });
+           context.changeset = null;
 
-           var body = selection.selectAll('.inspector-body').data([0]); // Enter
+           _validator.reset();
 
-           var bodyEnter = body.enter().append('div').attr('class', 'entity-editor inspector-body sep-top'); // Update
+           _features.reset();
 
-           body = body.merge(bodyEnter);
+           _history.reset();
 
-           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)];
-           }
+           _uploader.reset(); // don't leave stale state in the inspector
 
-           _sections.forEach(function (section) {
-             if (section.entityIDs) {
-               section.entityIDs(_entityIDs);
-             }
 
-             if (section.presets) {
-               section.presets(_activePresets);
-             }
+           context.container().select('.inspector-wrap *').remove();
+           return context;
+         };
+         /* Projections */
 
-             if (section.tags) {
-               section.tags(combinedTags);
-             }
 
-             if (section.state) {
-               section.state(_state);
-             }
+         context.projection = geoRawMercator();
+         context.curtainProjection = geoRawMercator();
+         /* Init */
 
-             body.call(section.render);
-           });
+         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.
 
-           context.history().on('change.entity-editor', historyChanged);
+           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.
 
-           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);
+           function initializeDependents() {
+             if (context.initialHashParams.presets) {
+               _mainPresetIndex.addablePresetIDs(new Set(context.initialHashParams.presets.split(',')));
              }
-           }
-         } // 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 (context.initialHashParams.locale) {
+               _mainLocalizer.preferredLocaleCodes(context.initialHashParams.locale);
+             } // kick off some async work
 
-         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
+             _mainLocalizer.ensureLoaded();
 
-             for (var k in changed) {
-               if (!k) continue;
-               var v = changed[k];
+             _background.ensureLoaded();
 
-               if (v !== undefined || tags.hasOwnProperty(k)) {
-                 tags[k] = v;
+             _mainPresetIndex.ensureLoaded();
+             Object.values(services).forEach(function (service) {
+               if (service && typeof service.init === 'function') {
+                 service.init();
                }
-             }
+             });
 
-             if (!onInput) {
-               tags = utilCleanTags(tags);
-             }
+             _map.init();
 
-             if (!fastDeepEqual(entity.tags, tags)) {
-               actions.push(actionChangeTags(entityID, tags));
-             }
-           }
+             _validator.init();
 
-           if (actions.length) {
-             var combinedAction = function combinedAction(graph) {
-               actions.forEach(function (action) {
-                 graph = action(graph);
+             _features.init();
+
+             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 */
                });
-               return graph;
-             };
+             } // if the container isn't available, e.g. when testing, don't load the UI
 
-             var annotation = _t('operations.change_tags.annotation');
 
-             if (_coalesceChanges) {
-               context.overwrite(combinedAction, annotation);
-             } else {
-               context.perform(combinedAction, annotation);
-               _coalesceChanges = !!onInput;
+             if (!context.container().empty()) {
+               _ui.ensureLoaded().then(function () {
+                 _photos.init();
+               });
              }
-           } // if leaving field (blur event), rerun validation
-
-
-           if (!onInput) {
-             context.validator().validate();
            }
-         }
-
-         function revertTags(keys) {
-           var actions = [];
-
-           for (var i in _entityIDs) {
-             var entityID = _entityIDs[i];
-             var original = context.graph().base().entities[entityID];
-             var changed = {};
+         };
 
-             for (var j in keys) {
-               var key = keys[j];
-               changed[key] = original ? original.tags[key] : undefined;
-             }
+         return context;
+       }
 
-             var entity = context.entity(entityID);
-             var tags = Object.assign({}, entity.tags); // shallow copy
+       // NSI contains the most correct tagging for many commonly mapped features.
+       // See https://github.com/osmlab/name-suggestion-index  and  https://nsi.guide
+       // DATA
 
-             for (var k in changed) {
-               if (!k) continue;
-               var v = changed[k];
+       var _nsiStatus = 'loading'; // 'loading', 'ok', 'failed'
 
-               if (v !== undefined || tags.hasOwnProperty(k)) {
-                 tags[k] = v;
-               }
-             }
+       var _nsi = {}; // Sometimes we can upgrade a feature tagged like `building=yes` to a better tag.
 
-             tags = utilCleanTags(tags);
+       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..
 
-             if (!fastDeepEqual(entity.tags, tags)) {
-               actions.push(actionChangeTags(entityID, tags));
-             }
-           }
+       var notNames = /:(colou?r|type|forward|backward|left|right|etymology|pronunciation|wikipedia)$/i; // Exceptions to the branchlike regexes
 
-           if (actions.length) {
-             var combinedAction = function combinedAction(graph) {
-               actions.forEach(function (action) {
-                 graph = action(graph);
-               });
-               return graph;
-             };
+       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 annotation = _t('operations.change_tags.annotation');
+       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.
+       //
 
-             if (_coalesceChanges) {
-               context.overwrite(combinedAction, annotation);
-             } else {
-               context.perform(combinedAction, annotation);
-               _coalesceChanges = false;
-             }
-           }
 
-           context.validator().validate();
-         }
+       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
+       //
 
-         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;
-         };
+       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)
 
-         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
+           };
+           _nsi.matcher = new Matcher();
 
-           _base = context.graph();
-           _coalesceChanges = false;
-           if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) return entityEditor; // exit early if no change
+           _nsi.matcher.buildMatchIndex(_nsi.data);
 
-           _entityIDs = val;
-           loadActivePresets(true);
-           return entityEditor.modified(false);
-         };
+           _nsi.matcher.buildLocationIndex(_nsi.data, _mainLocations.loco());
 
-         entityEditor.newFeature = function (val) {
-           if (!arguments.length) return _newFeature;
-           _newFeature = val;
-           return entityEditor;
-         };
+           Object.keys(_nsi.data).forEach(function (tkv) {
+             var category = _nsi.data[tkv];
+             var parts = tkv.split('/', 3); // tkv = "tree/key/value"
 
-         function loadActivePresets(isForNewSelection) {
-           var graph = context.graph();
-           var counts = {};
+             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 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 vmap = _nsi.kvt.get(k);
 
-           var matches = Object.keys(counts).sort(function (p1, p2) {
-             return counts[p2] - counts[p1];
-           }).map(function (pID) {
-             return _mainPresetIndex.item(pID);
-           });
+             if (!vmap) {
+               vmap = new Map();
 
-           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")
+               _nsi.kvt.set(k, vmap);
+             }
 
-             if (weakPreset && matches.length === 1 && matches[0].isFallback()) return;
-           }
+             vmap.set(v, t);
+             var tree = _nsi.trees[t]; // e.g. "brands", "operators"
 
-           entityEditor.presets(matches);
-         }
+             var mainTag = tree.mainTag; // e.g. "brand:wikidata", "operator:wikidata", etc
 
-         entityEditor.presets = function (val) {
-           if (!arguments.length) return _activePresets; // don't reload the same preset
+             var items = category.items || [];
+             items.forEach(function (item) {
+               // Remember some useful things for later, cache NSI id -> item
+               item.tkv = tkv;
+               item.mainTag = mainTag;
 
-           if (!utilArrayIdentical(val, _activePresets)) {
-             _activePresets = val;
-           }
+               _nsi.ids.set(item.id, item); // Cache Wikidata/Wikipedia values -> qid, for #6416
 
-           return entityEditor;
-         };
 
-         return utilRebind(entityEditor, dispatch$1, 'on');
-       }
+               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);
+             });
+           });
+         });
+       } // `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()
+       //   }
+       //
 
-       function uiPresetList(context) {
-         var dispatch$1 = dispatch('cancel', 'choose');
 
-         var _entityIDs;
+       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
 
-         var _currentPresets;
+           if (osmkey === 'route_master') osmkey = 'route';
 
-         var _autofocus = false;
+           var vmap = _nsi.kvt.get(osmkey);
 
-         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 (!vmap) return; // not an interesting key
 
-           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);
-             }
+           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 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
+         var preset = _mainPresetIndex.matchTags(tags, 'area');
 
-               var buttons = list.selectAll('.preset-list-button');
-               if (!buttons.empty()) buttons.nodes()[0].focus();
-             }
-           }
+         if (buildingPreset[preset.id]) {
+           alternate.add('building/yes');
+         }
 
-           function keypress(d3_event) {
-             // enter
-             var value = search.property('value');
+         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
+       //
 
-             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 identifyTree(tags) {
+         var unknown;
+         var t; // Check all tags
 
-             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');
-             }
+         Object.keys(tags).forEach(function (osmkey) {
+           if (t) return; // found already
 
-             list.call(drawList, results);
-             message.html(messageText);
-           }
+           var osmvalue = tags[osmkey];
+           if (!osmvalue) return; // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184
 
-           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);
+           if (osmkey === 'route_master') osmkey = 'route';
 
-           if (_autofocus) {
-             search.node().focus(); // Safari 14 doesn't always like to focus immediately,
-             // so try again on the next pass
+           var vmap = _nsi.kvt.get(osmkey);
 
-             setTimeout(function () {
-               search.node().focus();
-             }, 0);
+           if (!vmap) return; // this key is not in nsi
+
+           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 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);
-         }
 
-         function drawList(list, presets) {
-           presets = presets.matchAllGeometry(entityGeometries());
-           var collection = presets.collection.reduce(function (collection, preset) {
-             if (!preset) return collection;
+       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,
 
-             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 t = identifyTree(tags);
+         if (!t) return empty;
 
-             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();
-         }
+         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
 
-         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
+           };
+         } 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"]
 
-           if (d3_event.keyCode === utilKeybinding.keyCodes['↓']) {
-             d3_event.preventDefault();
-             d3_event.stopPropagation(); // the next item in the list at the same level
 
-             var nextItem = select(item.node().nextElementSibling); // if there is no next item in this list
+         if (tags.name && testNameFragments) {
+           var nameParts = tags.name.split(/[\s\-\/,.]/);
 
-             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
+           for (var split = nameParts.length; split > 0; split--) {
+             var name = nameParts.slice(0, split).join(' '); // e.g. "TUI ReiseCenter"
 
-             } else if (select(this).classed('expanded')) {
-               // select the first subitem instead
-               nextItem = item.select('.subgrid .preset-list-item:first-child');
+             primary.add(name);
+           }
+         } // Check all tags
+
+
+         Object.keys(tags).forEach(function (osmkey) {
+           var osmvalue = tags[osmkey];
+           if (!osmvalue) return;
+
+           if (isNamelike(osmkey, 'primary')) {
+             if (/;/.test(osmvalue)) {
+               foundSemi = true;
+             } else {
+               primary.add(osmvalue);
+               alternate["delete"](osmvalue);
+             }
+           } 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
 
-             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 (tags.man_made === 'flagpole' && !primary.size && !alternate.size && !!tags.country) {
+           var osmvalue = tags.country;
 
-           } else if (d3_event.keyCode === utilKeybinding.keyCodes['↑']) {
-             d3_event.preventDefault();
-             d3_event.stopPropagation(); // the previous item in the list at the same level
+           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.
 
-             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
+         if (foundSemi) {
+           return empty;
+         } else {
+           return {
+             primary: primary,
+             alternate: alternate
+           };
+         }
 
-             } 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 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
+       //
 
-             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
 
-           } 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
+       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
+       //   }
+       //
 
-             if (!parentItem.empty()) {
-               parentItem.select('.preset-list-button').node().focus();
-             } // arrow right, choose this item
 
-           } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
-             d3_event.preventDefault();
-             d3_event.stopPropagation();
-             item.datum().choose.call(select(this).node());
-           }
-         }
+       function _upgradeTags(tags, loc) {
+         var newTags = Object.assign({}, tags); // shallow copy
 
-         function CategoryItem(preset) {
-           var box,
-               sublist,
-               shown = false;
+         var changed = false; // Before anything, perform trivial Wikipedia/Wikidata replacements
 
-           function item(selection) {
-             var wrap = selection.append('div').attr('class', 'preset-list-button-wrap category');
+         Object.keys(newTags).forEach(function (osmkey) {
+           var matchTag = osmkey.match(/^(\w+:)?wikidata$/);
 
-             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();
-             }
+           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...
 
-             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
+             if (replace && replace.wikidata !== undefined) {
+               // replace or delete `*:wikidata` tag
+               changed = true;
 
-                 if (!select(this).classed('expanded')) {
-                   // toggle expansion (expand the item)
-                   click.call(this, d3_event);
-                 } // left arrow, collapse the focused item
+               if (replace.wikidata) {
+                 newTags[osmkey] = replace.wikidata;
+               } else {
+                 delete newTags[osmkey];
+               }
+             }
 
-               } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '→' : '←']) {
-                 d3_event.preventDefault();
-                 d3_event.stopPropagation(); // if the item is expanded
+             if (replace && replace.wikipedia !== undefined) {
+               // replace or delete `*:wikipedia` tag
+               changed = true;
+               var wpkey = "".concat(prefix, "wikipedia");
 
-                 if (select(this).classed('expanded')) {
-                   // toggle expansion (collapse the item)
-                   click.call(this, d3_event);
-                 }
+               if (replace.wikipedia) {
+                 newTags[wpkey] = replace.wikipedia;
                } else {
-                 itemKeydown.call(this, d3_event);
+                 delete newTags[wpkey];
                }
-             });
-             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');
+             }
            }
+         }); // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184
 
-           item.choose = function () {
-             if (!box || !sublist) return;
+         var isRouteMaster = tags.type === 'route_master'; // Gather key/value tag pairs to try to match
 
-             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');
-             }
-           };
+         var tryKVs = gatherKVs(tags);
 
-           item.preset = preset;
-           return item;
-         }
+         if (!tryKVs.primary.size && !tryKVs.alternate.size) {
+           return changed ? {
+             newTags: newTags,
+             matched: null
+           } : null;
+         } // Gather namelike tag values to try to match
 
-         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 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`.
 
-             if (!context.inIntro()) {
-               _mainPresetIndex.setMostRecent(preset, entityGeometries()[0]);
-             }
+         var foundQID = _nsi.qids.get(tags.wikidata) || _nsi.qids.get(tags.wikipedia);
 
-             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);
-               }
+         if (foundQID) tryNames.primary.add(foundQID); // matcher will recognize the Wikidata QID as name too
 
-               return graph;
-             }, _t('operations.change_tags.annotation'));
-             context.validator().validate(); // rerun validation
+         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
 
-             dispatch$1.call('choose', this, preset);
-           };
 
-           item.help = function (d3_event) {
-             d3_event.stopPropagation();
-             item.reference.toggle();
-           };
+         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.
 
-           item.preset = preset;
-           item.reference = uiTagReference(preset.reference());
-           return item;
-         }
+         for (var i = 0; i < tuples.length && !foundPrimary; i++) {
+           var tuple = tuples[i];
 
-         function updateForFeatureHiddenState() {
-           if (!_entityIDs.every(context.hasEntity)) return;
-           var geometries = entityGeometries();
-           var button = context.container().selectAll('.preset-list .preset-list-button'); // remove existing tooltips
+           var hits = _nsi.matcher.match(tuple.k, tuple.v, tuple.n, loc); // Attempt to match an item in NSI
 
-           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;
-             }
+           if (!hits || !hits.length) continue; // no match, try next tuple
 
-             var isHiddenPreset = !context.inIntro() && !!hiddenPresetFeaturesId && (_currentPresets.length !== 1 || item.preset !== _currentPresets[0]);
-             select(this).classed('disabled', isHiddenPreset);
+           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 (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'));
-             }
-           });
-         }
+           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
 
-         presetList.autofocus = function (val) {
-           if (!arguments.length) return _autofocus;
-           _autofocus = val;
-           return presetList;
-         };
+             var item = _nsi.ids.get(itemID);
 
-         presetList.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
+             if (!item) continue;
+             var mainTag = item.mainTag; // e.g. `brand:wikidata`
 
-           if (_entityIDs && _entityIDs.length) {
-             var presets = _entityIDs.map(function (entityID) {
-               return _mainPresetIndex.match(context.entity(entityID), context.graph());
-             });
+             var itemQID = item.tags[mainTag]; // e.g. `brand:wikidata` qid
 
-             presetList.presets(presets);
-           }
+             var notQID = newTags["not:".concat(mainTag)]; // e.g. `not:brand:wikidata` qid
 
-           return presetList;
-         };
+             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..
 
-         presetList.presets = function (val) {
-           if (!arguments.length) return _currentPresets;
-           _currentPresets = val;
-           return presetList;
-         };
 
-         function entityGeometries() {
-           var counts = {};
+             if (!bestItem || isPrimary) {
+               bestItem = item;
 
-           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)
+               if (isPrimary) {
+                 foundPrimary = true;
+               }
 
-             if (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
-               geometry = 'point';
+               break; // can ignore the rest of the hits from this match
              }
-
-             if (!counts[geometry]) counts[geometry] = 0;
-             counts[geometry] += 1;
            }
+         } // At this point we have matched a canonical item and can suggest tag upgrades..
 
-           return Object.keys(counts).sort(function (geom1, geom2) {
-             return counts[geom2] - counts[geom1];
-           });
-         }
 
-         function combinedEntityExtent() {
-           return _entityIDs.reduce(function (extent, entityID) {
-             var entity = context.graph().entity(entityID);
-             return extent.extend(entity.extent(context.graph()));
-           }, geoExtent());
-         }
+         if (bestItem) {
+           var _ret = function () {
+             var itemID = bestItem.id;
+             var item = JSON.parse(JSON.stringify(bestItem)); // deep copy
 
-         return utilRebind(presetList, dispatch$1, 'on');
-       }
+             var tkv = item.tkv;
+             var parts = tkv.split('/', 3); // tkv = "tree/key/value"
 
-       function uiInspector(context) {
-         var presetList = uiPresetList(context);
-         var entityEditor = uiEntityEditor(context);
-         var wrap = select(null),
-             presetPane = select(null),
-             editorPane = select(null);
-         var _state = 'select';
+             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)
 
-         var _entityIDs;
+             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`)
 
-         var _newFeature = false;
+             ['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 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');
+             _nsi.kvt.forEach(function (vmap, k) {
+               if (newTags[k] === 'yes') delete newTags[k];
+             }); // Replace mistagged `wikidata`/`wikipedia` with e.g. `brand:wikidata`/`brand:wikipedia`
 
-           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 (foundQID) {
+               delete newTags.wikipedia;
+               delete newTags.wikidata;
+             } // Do the tag upgrade
 
-             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
+             Object.assign(newTags, item.tags, keepTags); // Swap `route` back to `route_master` - name-suggestion-index#5184
 
-             if (entity.geometry(context.graph()) !== 'vertex') return false; // show vertex relations if any
+             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`..
 
-             if (context.graph().parentRelations(entity).length) return false; // show vertex issues if there are any
 
-             if (context.validator().getEntityIssues(entityID).length) return false; // show turn retriction editor for junction vertices
+             var origName = tags.name;
+             var newName = newTags.name;
 
-             if (entity.isHighwayIntersection(context.graph())) return false; // otherwise show preset list for uninteresting vertices
+             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 true;
-           }
+               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\-\/,.]/);
 
-           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);
-           }
+                 for (var split = nameParts.length; split > 0; split--) {
+                   var name = nameParts.slice(0, split).join(' '); // e.g. "TUI ReiseCenter"
 
-           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])));
-         }
+                   var branch = nameParts.slice(split).join(' '); // e.g. "Neuss Innenstadt"
 
-         inspector.showList = function (presets) {
-           presetPane.classed('hide', false);
-           wrap.transition().styleTween('right', function () {
-             return interpolate('0%', '-100%');
-           }).on('end', function () {
-             editorPane.classed('hide', true);
-           });
+                   var nameHits = _nsi.matcher.match(k, v, name, loc);
 
-           if (presets) {
-             presetList.presets(presets);
-           }
+                   if (!nameHits || !nameHits.length) continue; // no match, try next name fragment
 
-           presetPane.call(presetList.autofocus(true));
-         };
+                   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
 
-         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);
-             });
+                         } else {
+                           // "branch" is not noise and not something in NSI
+                           newTags.branch = branch; // Stick it in the `branch` tag..
+                         }
+                       }
+                     }
 
-             if (preset) {
-               entityEditor.presets([preset]);
+                     break;
+                   }
+                 }
+               }
              }
 
-             editorPane.call(entityEditor);
-           }
-         };
+             return {
+               v: {
+                 newTags: newTags,
+                 matched: item
+               }
+             };
+           }();
 
-         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 (_typeof(_ret) === "object") return _ret.v;
+         }
 
-           context.container().selectAll('.field-help-body').remove();
-           return inspector;
-         };
+         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
+       //
 
-         inspector.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return inspector;
-         };
 
-         inspector.newFeature = function (val) {
-           if (!arguments.length) return _newFeature;
-           _newFeature = val;
-           return inspector;
-         };
+       function _isGenericName(tags) {
+         var n = tags.name;
+         if (!n) return false; // tryNames just contains the `name` tag value and nothing else
 
-         return inspector;
-       }
+         var tryNames = {
+           primary: new Set([n]),
+           alternate: new Set()
+         }; // Gather key/value tag pairs to try to match
 
-       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);
+         var tryKVs = gatherKVs(tags);
+         if (!tryKVs.primary.size && !tryKVs.alternate.size) return false; // Order the [key,value,name] tuples - test primary before alternate
 
-         var _current;
+         var tuples = gatherTuples(tryKVs, tryNames);
 
-         var _wasData = false;
-         var _wasNote = false;
-         var _wasQaItem = false; // use pointer events on supported platforms; fallback to mouse events
+         for (var i = 0; i < tuples.length; i++) {
+           var tuple = tuples[i];
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+           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.
 
-         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;
+           if (hits && hits.length && hits[0].match === 'excludeGeneric') return true;
+         }
 
-           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
+         return false;
+       } // PUBLIC INTERFACE
 
-             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
 
-             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 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 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 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 (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 _oscCache;
 
-               if (isCollapsed) {
-                 context.ui().onResize([-sidebarWidth * scaleX, 0]);
-               } else {
-                 context.ui().onResize([-dx * scaleX, 0]);
-               }
-             }
+       var _oscSelectedImage;
+
+       var _loadViewerPromise$1;
+
+       function abortRequest$3(controller) {
+         controller.abort();
+       }
+
+       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;
+       }
+
+       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
+
+         var cache = _oscCache[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$1(which, currZoom, url, tile);
+         });
+       }
+
+       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];
 
-           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);
+           if (!data || !data.currentPageItems || !data.currentPageItems.length) {
+             throw new Error('No Data');
            }
 
-           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 features = data.currentPageItems.map(function (item) {
+             var loc = [+item.lng, +item.lat];
+             var d;
 
-           var hoverModeSelect = function hoverModeSelect(targets) {
-             context.container().selectAll('.feature-list-item button').classed('hover', 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
 
-             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 seq = _oscCache.sequences[d.sequence_id];
 
-               if (!elements.empty()) {
-                 elements.classed('hover', true);
+               if (!seq) {
+                 seq = {
+                   rotation: 0,
+                   images: []
+                 };
+                 _oscCache.sequences[d.sequence_id] = seq;
                }
-             }
-           };
-
-           sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);
 
-           function hover(targets) {
-             var datum = targets && targets.length && targets[0];
+               seq.images[d.sequence_index] = d;
+               _oscCache.images.forImageKey[d.key] = d; // cache imageKey -> image
+             }
 
-             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;
+             return {
+               minX: loc[0],
+               minY: loc[1],
+               maxX: loc[0],
+               maxY: loc[1],
+               data: d
+             };
+           });
+           cache.rtree.load(features);
 
-               if (osm) {
-                 datum = osm.getNote(datum.id); // marker may contain stale data - get latest
-               }
+           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
+           }
 
-               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];
+           if (which === 'images') {
+             dispatch$3.call('loadedImages');
+           }
+         })["catch"](function () {
+           cache.loaded[id] = true;
+           delete cache.inflight[id];
+         });
+       } // partition viewport into higher zoom tiles
 
-               if (errService) {
-                 // marker may contain stale data - get latest
-                 datum = errService.getError(datum.id);
-               } // Currently only three possible services
 
+       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 errEditor;
+         var tiler = utilTiler().zoomExtent([z2, z2]);
+         return tiler.getTiles(projection).map(function (tile) {
+           return tile.extent;
+         });
+       } // no more than `limit` results per partition.
 
-               if (datum.service === 'keepRight') {
-                 errEditor = keepRightEditor;
-               } else if (datum.service === 'osmose') {
-                 errEditor = osmoseEditor;
-               } else {
-                 errEditor = improveOsmEditor;
-               }
 
-               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);
+       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 (!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();
-             }
+       var serviceKartaview = {
+         init: function init() {
+           if (!_oscCache) {
+             this.reset();
            }
 
-           sidebar.hover = throttle(hover, 200);
+           this.event = utilRebind(this, dispatch$3, 'on');
+         },
+         reset: function reset() {
+           if (_oscCache) {
+             Object.values(_oscCache.images.inflight).forEach(abortRequest$3);
+           }
 
-           sidebar.intersects = function (extent) {
-             var rect = selection.node().getBoundingClientRect();
-             return extent.intersects([context.projection.invert([0, rect.height]), context.projection.invert([rect.width, 0])]);
+           _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
 
-           sidebar.select = function (ids, newFeature) {
-             sidebar.hide();
-
-             if (ids && ids.length) {
-               var entity = ids.length === 1 && context.entity(ids[0]);
+           _oscCache.images.rtree.search(bbox).forEach(function (d) {
+             sequenceKeys[d.data.sequence_id] = true;
+           }); // make linestrings from those sequences
 
-               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
+           var lineStrings = [];
+           Object.keys(sequenceKeys).forEach(function (sequenceKey) {
+             var seq = _oscCache.sequences[sequenceKey];
+             var images = seq && seq.images;
 
-               inspector.state('select').entityIDs(ids).newFeature(newFeature);
-               inspectorWrap.call(inspector);
-             } else {
-               inspector.state('hide');
+             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
 
-           sidebar.showPresetList = function () {
-             inspector.showList();
-           };
+           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
 
-           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);
-           };
+           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);
+           });
 
-           sidebar.hide = function () {
-             featureListWrap.classed('inspector-hidden', false);
-             inspectorWrap.classed('inspector-hidden', true);
-             if (_current) _current.remove();
-             _current = null;
-           };
+           function zoomPan(d3_event) {
+             var t = d3_event.transform;
+             context.container().select('.photoviewer .kartaview-image-wrap').call(utilSetTransform, t.x, t.y, t.k);
+           }
 
-           sidebar.expand = function (moveMap) {
-             if (selection.classed('collapsed')) {
-               sidebar.toggle(moveMap);
-             }
-           };
+           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)');
+             };
+           }
 
-           sidebar.collapse = function (moveMap) {
-             if (!selection.classed('collapsed')) {
-               sidebar.toggle(moveMap);
-             }
-           };
+           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
 
-           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
 
-             selection.style('width', sidebarWidth + 'px');
-             var startMargin, endMargin, lastMargin;
+           _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();
 
-             if (isCollapsing) {
-               startMargin = lastMargin = 0;
-               endMargin = -sidebarWidth;
-             } else {
-               startMargin = lastMargin = -sidebarWidth;
-               endMargin = 0;
+           if (isHidden) {
+             viewer.selectAll('.photo-wrapper:not(.kartaview-wrapper)').classed('hide', true);
+             viewer.selectAll('.photo-wrapper.kartaview-wrapper').classed('hide', false);
+           }
+
+           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 (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('|');
              }
 
-             if (!isCollapsing) {
-               // unhide the sidebar's content before it transitions onscreen
-               selection.classed('collapsed', isCollapsing);
+             if (d.captured_at) {
+               attribution.append('span').attr('class', 'captured_at').text(localeDateString(d.captured_at));
+               attribution.append('span').text('|');
              }
 
-             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 %
+             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');
+           }
 
+           return this;
 
-               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
+           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
 
-           resizer.on('dblclick', function (d3_event) {
-             d3_event.preventDefault();
+           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
 
-             if (d3_event.sourceEvent) {
-               d3_event.sourceEvent.preventDefault();
-             }
+           context.container().selectAll('.layer-kartaview .viewfield-group .viewfield').attr('d', viewfieldPath);
 
-             sidebar.toggle();
-           }); // ensure hover sidebar is closed when zooming out beyond editable zoom
+           function viewfieldPath() {
+             var d = this.parentNode.__data__;
 
-           context.map().on('crossEditableZoom.sidebar', function (within) {
-             if (!within && !selection.select('.inspector-hover').empty()) {
-               hover([]);
+             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';
              }
-           });
-         }
-
-         sidebar.showPresetList = function () {};
+           }
 
-         sidebar.hover = function () {};
+           return this;
+         },
+         updateUrlImage: function updateUrlImage(imageKey) {
+           if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);
 
-         sidebar.hover.cancel = function () {};
+             if (imageKey) {
+               hash.photo = 'kartaview/' + imageKey;
+             } else {
+               delete hash.photo;
+             }
 
-         sidebar.intersects = function () {};
+             window.location.replace('#' + utilQsString(hash, true));
+           }
+         },
+         cache: function cache() {
+           return _oscCache;
+         }
+       };
 
-         sidebar.select = function () {};
+       var hashes$1 = {exports: {}};
 
-         sidebar.show = function () {};
+       (function (module, exports) {
+         (function () {
+           var Hashes;
 
-         sidebar.hide = function () {};
+           function utf8Encode(str) {
+             var x,
+                 y,
+                 output = '',
+                 i = -1,
+                 l;
 
-         sidebar.expand = function () {};
+             if (str && str.length) {
+               l = str.length;
 
-         sidebar.collapse = function () {};
+               while ((i += 1) < l) {
+                 /* Decode utf-16 surrogate pairs */
+                 x = str.charCodeAt(i);
+                 y = i + 1 < l ? str.charCodeAt(i + 1) : 0;
 
-         sidebar.toggle = function () {};
+                 if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
+                   x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
+                   i += 1;
+                 }
+                 /* Encode output as utf-8 */
 
-         return sidebar;
-       }
 
-       function uiSourceSwitch(context) {
-         var keys;
+                 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);
+                 }
+               }
+             }
 
-         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
+             return output;
+           }
 
-           context.flush(); // remove stored data
+           function utf8Decode(str) {
+             var i,
+                 ac,
+                 c1,
+                 c2,
+                 c3,
+                 arr = [],
+                 l;
+             i = ac = c1 = c2 = c3 = 0;
 
-           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)
-         }
+             if (str && str.length) {
+               l = str.length;
+               str += '';
 
-         var sourceSwitch = function sourceSwitch(selection) {
-           selection.append('a').attr('href', '#').html(_t.html('source_switch.live')).attr('class', 'live chip').on('click', click);
-         };
+               while (i < l) {
+                 c1 = str.charCodeAt(i);
+                 ac += 1;
 
-         sourceSwitch.keys = function (_) {
-           if (!arguments.length) return keys;
-           keys = _;
-           return sourceSwitch;
-         };
+                 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;
+                 }
+               }
+             }
 
-         return sourceSwitch;
-       }
+             return arr.join('');
+           }
+           /**
+            * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+            * to work around bugs in some JS interpreters.
+            */
 
-       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 safe_add(x, y) {
+             var lsw = (x & 0xFFFF) + (y & 0xFFFF),
+                 msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+             return msw << 16 | lsw & 0xFFFF;
            }
-         };
-       }
-
-       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.
+           /**
+            * Bitwise rotate a 32-bit number to the left.
+            */
 
-           var updateMessage = '';
-           var sawPrivacyVersion = corePreferences('sawPrivacyVersion');
-           var showSplash = !corePreferences('sawSplash');
 
-           if (sawPrivacyVersion !== context.privacyVersion) {
-             updateMessage = _t('splash.privacy_update');
-             showSplash = true;
+           function bit_rol(num, cnt) {
+             return num << cnt | num >>> 32 - cnt;
            }
+           /**
+            * Convert a raw string to a hex string
+            */
 
-           if (!showSplash) return;
-           corePreferences('sawSplash', true);
-           corePreferences('sawPrivacyVersion', context.privacyVersion); // fetch intro graph data now, while user is looking at the splash screen
-
-           _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');
-         };
-       }
 
-       function uiStatus(context) {
-         var osm = context.connection();
-         return function (selection) {
-           if (!osm) return;
+           function rstr2hex(input, hexcase) {
+             var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
+                 output = '',
+                 x,
+                 i = 0,
+                 l = input.length;
 
-           function update(err, apiStatus) {
-             selection.html('');
+             for (; i < l; i += 1) {
+               x = input.charCodeAt(i);
+               output += hex_tab.charAt(x >>> 4 & 0x0F) + hex_tab.charAt(x & 0x0F);
+             }
 
-             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
+             return output;
+           }
+           /**
+            * Convert an array of big-endian words to a string
+            */
 
-                   osm.reloadApiStatus();
-                 }, 2000); // eslint-disable-next-line no-warning-comments
-                 // TODO: nice messages for different error types
 
+           function binb2rstr(input) {
+             var i,
+                 l = input.length * 32,
+                 output = '';
 
-                 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();
-                 });
-               }
-             } 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'));
+             for (i = 0; i < l; i += 8) {
+               output += String.fromCharCode(input[i >> 5] >>> 24 - i % 32 & 0xFF);
              }
 
-             selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
+             return output;
            }
+           /**
+            * Convert an array of little-endian words to a string
+            */
 
-           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();
-         };
-       }
+           function binl2rstr(input) {
+             var i,
+                 l = input.length * 32,
+                 output = '';
 
-       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;
+             for (i = 0; i < l; i += 8) {
+               output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+             }
 
-         mode.enter = function () {
-           context.install(behavior);
-         };
+             return output;
+           }
+           /**
+            * Convert a raw string to an array of little-endian words
+            * Characters >255 have their high-byte silently ignored.
+            */
 
-         mode.exit = function () {
-           context.uninstall(behavior);
-         };
 
-         mode.selectedIDs = function () {
-           return [wayID];
-         };
+           function rstr2binl(input) {
+             var i,
+                 l = input.length * 8,
+                 output = Array(input.length >> 2),
+                 lo = output.length;
 
-         mode.activeID = function () {
-           return behavior && behavior.activeID() || [];
-         };
+             for (i = 0; i < lo; i += 1) {
+               output[i] = 0;
+             }
 
-         return mode;
-       }
+             for (i = 0; i < l; i += 8) {
+               output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << i % 32;
+             }
 
-       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');
+             return output;
+           }
+           /**
+            * Convert a raw string to an array of big-endian words
+            * Characters >255 have their high-byte silently ignored.
+            */
 
-         function actionClose(wayId) {
-           return function (graph) {
-             return graph.replace(graph.entity(wayId).close());
-           };
-         }
 
-         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 rstr2binb(input) {
+             var i,
+                 l = input.length * 8,
+                 output = Array(input.length >> 2),
+                 lo = output.length;
 
-         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));
-         }
+             for (i = 0; i < lo; i += 1) {
+               output[i] = 0;
+             }
 
-         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));
-         }
+             for (i = 0; i < l; i += 8) {
+               output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << 24 - i % 32;
+             }
 
-         mode.enter = function () {
-           context.install(behavior);
-         };
+             return output;
+           }
+           /**
+            * Convert a raw string to an arbitrary string encoding
+            */
 
-         mode.exit = function () {
-           context.uninstall(behavior);
-         };
 
-         return mode;
-       }
+           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 */
 
-       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');
+             dividend = Array(Math.ceil(input.length / 2));
+             ld = dividend.length;
 
-         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));
-         }
+             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 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));
-         }
+             while (dividend.length > 0) {
+               quotient = Array();
+               x = 0;
 
-         mode.enter = function () {
-           context.install(behavior);
-         };
+               for (i = 0; i < dividend.length; i += 1) {
+                 x = (x << 16) + dividend[i];
+                 q = Math.floor(x / divisor);
+                 x -= q * divisor;
 
-         mode.exit = function () {
-           context.uninstall(behavior);
-         };
+                 if (quotient.length > 0 || q > 0) {
+                   quotient[quotient.length] = q;
+                 }
+               }
 
-         return mode;
-       }
+               remainders[remainders.length] = x;
+               dividend = quotient;
+             }
+             /* Convert the remainders to the output string */
 
-       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);
-         }
+             output = '';
 
-         function addWay(loc, edge) {
-           var node = osmNode({
-             tags: defaultTags
-           });
-           context.perform(actionAddMidpoint({
-             loc: loc,
-             edge: edge
-           }, node), _t('operations.add.annotation.vertex'));
-           enterSelectMode(node);
-         }
+             for (i = remainders.length - 1; i >= 0; i--) {
+               output += encoding.charAt(remainders[i]);
+             }
+             /* Append leading zero equivalents */
 
-         function enterSelectMode(node) {
-           context.enter(modeSelect(context, [node.id]).newFeature(true));
-         }
 
-         function addNode(node) {
-           if (Object.keys(defaultTags).length === 0) {
-             enterSelectMode(node);
-             return;
-           }
+             full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));
 
-           var tags = Object.assign({}, node.tags); // shallow copy
+             for (i = output.length; i < full_length; i += 1) {
+               output = encoding[0] + output;
+             }
 
-           for (var key in defaultTags) {
-             tags[key] = defaultTags[key];
+             return output;
            }
+           /**
+            * Convert a raw string to a base-64 string
+            */
 
-           context.perform(actionChangeTags(node.id, tags), _t('operations.add.annotation.point'));
-           enterSelectMode(node);
-         }
 
-         function cancel() {
-           context.enter(modeBrowse(context));
-         }
+           function rstr2b64(input, b64pad) {
+             var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
+                 output = '',
+                 len = input.length,
+                 i,
+                 j,
+                 triplet;
+             b64pad = b64pad || '=';
 
-         mode.enter = function () {
-           context.install(behavior);
-         };
+             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);
 
-         mode.exit = function () {
-           context.uninstall(behavior);
-         };
+               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);
+                 }
+               }
+             }
 
-         return mode;
-       }
+             return output;
+           }
 
-       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);
+           Hashes = {
+             /**
+              * @property {String} version
+              * @readonly
+              */
+             VERSION: '1.0.6',
 
-         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)
+             /**
+              * @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
 
-           context.map().pan([0, 0]);
-           context.selectedNoteID(note.id).enter(modeSelectNote(context, note.id).newFeature(true));
-         }
+               this.encode = function (input) {
+                 var i,
+                     j,
+                     triplet,
+                     output = '',
+                     len = input.length;
+                 pad = pad || '=';
+                 input = utf8 ? utf8Encode(input) : input;
 
-         function cancel() {
-           context.enter(modeBrowse(context));
-         }
+                 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);
+                     }
+                   }
+                 }
 
-         mode.enter = function () {
-           context.install(behavior);
-         };
+                 return output;
+               }; // public method for decoding
 
-         mode.exit = function () {
-           context.uninstall(behavior);
-         };
 
-         return mode;
-       }
+               this.decode = function (input) {
+                 // var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
+                 var i,
+                     o1,
+                     o2,
+                     o3,
+                     h1,
+                     h2,
+                     h3,
+                     h4,
+                     bits,
+                     ac,
+                     dec = '',
+                     arr = [];
 
-       function uiConflicts(context) {
-         var dispatch$1 = dispatch('cancel', 'save');
-         var keybinding = utilKeybinding('conflicts');
+                 if (!input) {
+                   return input;
+                 }
 
-         var _origChanges;
+                 i = ac = 0;
+                 input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
+                 //input += '';
 
-         var _conflictList;
+                 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 _shownConflictIndex;
+                   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);
 
-         function keybindingOn() {
-           select(document).call(keybinding.on('⎋', cancel, true));
-         }
+                 dec = arr.join('');
+                 dec = utf8 ? utf8Decode(dec) : dec;
+                 return dec;
+               }; // set custom pad string
 
-         function keybindingOff() {
-           select(document).call(keybinding.unbind);
-         }
 
-         function tryAgain() {
-           keybindingOff();
-           dispatch$1.call('save');
-         }
+               this.setPad = function (str) {
+                 pad = str || pad;
+                 return this;
+               }; // set custom tab string characters
 
-         function cancel() {
-           keybindingOff();
-           dispatch$1.call('cancel');
-         }
 
-         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
+               this.setTab = function (str) {
+                 tab = str || tab;
+                 return this;
+               };
 
-           var detected = utilDetect();
-           var changeset = new osmChangeset();
-           delete changeset.id; // Export without changeset_id
+               this.setUTF8 = function (bool) {
+                 if (typeof bool === 'boolean') {
+                   utf8 = bool;
+                 }
 
-           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');
+                 return this;
+               };
+             },
 
-           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);
-             });
-           }
+             /**
+              * 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;
 
-           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);
-         }
+               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)
 
-         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..
 
-           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);
-           }
+               return (crc ^ -1) >>> 0;
+             },
 
-           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);
-           });
-         }
+             /**
+              * @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 addChoices(selection) {
-           var choices = selection.append('ul').attr('class', 'layer-list').selectAll('li').data(function (d) {
-             return d.choices || [];
-           }); // enter
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s), hexcase);
+               };
 
-           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.b64 = function (s) {
+                 return rstr2b64(rstr(s), b64pad);
+               };
 
-           choicesEnter.merge(choices).each(function (d) {
-             var ul = this.parentNode;
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s), e);
+               };
 
-             if (ul.__data__.chosen === d.id) {
-               choose(null, ul, d);
-             }
-           });
-         }
+               this.raw = function (s) {
+                 return rstr(s);
+               };
 
-         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);
-         }
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d), hexcase);
+               };
 
-         function zoomToEntity(id, extent) {
-           context.surface().selectAll('.hover').classed('hover', false);
-           var entity = context.graph().hasEntity(id);
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };
 
-           if (entity) {
-             if (extent) {
-               context.map().trimmedExtent(extent);
-             } else {
-               context.map().zoomToEase(entity);
-             }
+               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
+                */
 
-             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.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * Enable/disable uppercase hexadecimal returned string
+                * @param {Boolean}
+                * @return {Object} this
+                */
 
-         conflicts.conflictList = function (_) {
-           if (!arguments.length) return _conflictList;
-           _conflictList = _;
-           return conflicts;
-         };
 
-         conflicts.origChanges = function (_) {
-           if (!arguments.length) return _origChanges;
-           _origChanges = _;
-           return conflicts;
-         };
+               this.setUpperCase = function (a) {
+                 if (typeof a === 'boolean') {
+                   hexcase = a;
+                 }
 
-         conflicts.shownEntityIds = function () {
-           if (_conflictList && typeof _shownConflictIndex === 'number') {
-             return [_conflictList[_shownConflictIndex].id];
-           }
+                 return this;
+               };
+               /**
+                * Defines a base64 pad string
+                * @param {String} Pad
+                * @return {Object} this
+                */
 
-           return [];
-         };
 
-         return utilRebind(conflicts, dispatch$1, 'on');
-       }
+               this.setPad = function (a) {
+                 b64pad = a || b64pad;
+                 return this;
+               };
+               /**
+                * Defines a base64 pad string
+                * @param {Boolean}
+                * @return {Object} [this]
+                */
 
-       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();
-           }).html(_t.html('confirm.okay')).node().focus();
-           return modalSelection;
-         };
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }
 
-         return modalSelection;
-       }
+                 return this;
+               }; // private methods
 
-       function uiChangesetEditor(context) {
-         var dispatch$1 = dispatch('change');
-         var formFields = uiFormFields(context);
-         var commentCombo = uiCombobox(context, 'comment').caseSensitive(true);
+               /**
+                * Calculate the MD5 of a raw string
+                */
 
-         var _fieldsArr;
 
-         var _tags;
+               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)
+                */
 
-         var _changesetID;
 
-         function changesetEditor(selection) {
-           render(selection);
-         }
+               function rstr_hmac(key, data) {
+                 var bkey, ipad, opad, hash, i;
+                 key = utf8 ? utf8Encode(key) : key;
+                 data = utf8 ? utf8Encode(data) : data;
+                 bkey = rstr2binl(key);
 
-         function render(selection) {
-           var initial = false;
+                 if (bkey.length > 16) {
+                   bkey = binl(bkey, key.length * 8);
+                 }
 
-           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
-             })];
+                 ipad = Array(16), opad = Array(16);
 
-             _fieldsArr.forEach(function (field) {
-               field.on('change', function (t, onInput) {
-                 dispatch$1.call('change', field, undefined, t, onInput);
-               });
-             });
-           }
+                 for (i = 0; i < 16; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }
 
-           _fieldsArr.forEach(function (field) {
-             field.tags(_tags);
-           });
+                 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.
+                */
 
-           selection.call(formFields.fieldsArr(_fieldsArr));
 
-           if (initial) {
-             var commentField = selection.select('.form-field-comment textarea');
-             var commentNode = commentField.node();
+               function binl(x, len) {
+                 var i,
+                     olda,
+                     oldb,
+                     oldc,
+                     oldd,
+                     a = 1732584193,
+                     b = -271733879,
+                     c = -1732584194,
+                     d = 271733878;
+                 /* append padding */
 
-             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
+                 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);
+                 }
 
-             utilTriggerEvent(commentField, 'blur');
-             var osm = context.connection();
+                 return Array(a, b, c, d);
+               }
+               /**
+                * These functions implement the four basic operations the algorithm uses.
+                */
 
-             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
 
+               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);
+               }
 
-           var hasGoogle = _tags.comment.match(/google/i);
+               function md5_ff(a, b, c, d, x, s, t) {
+                 return md5_cmn(b & c | ~b & d, a, b, x, s, t);
+               }
 
-           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);
-         }
+               function md5_gg(a, b, c, d, x, s, t) {
+                 return md5_cmn(b & d | c & ~d, a, b, x, s, t);
+               }
 
-         changesetEditor.tags = function (_) {
-           if (!arguments.length) return _tags;
-           _tags = _; // Don't reset _fieldsArr here.
+               function md5_hh(a, b, c, d, x, s, t) {
+                 return md5_cmn(b ^ c ^ d, a, b, x, s, t);
+               }
 
-           return changesetEditor;
-         };
+               function md5_ii(a, b, c, d, x, s, t) {
+                 return md5_cmn(c ^ (b | ~d), a, b, x, s, t);
+               }
+             },
 
-         changesetEditor.changesetID = function (_) {
-           if (!arguments.length) return _changesetID;
-           if (_changesetID === _) return changesetEditor;
-           _changesetID = _;
-           _fieldsArr = null;
-           return changesetEditor;
-         };
+             /**
+              * @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
 
-         return utilRebind(changesetEditor, dispatch$1, 'on');
-       }
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s), hexcase);
+               };
 
-       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);
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s), b64pad);
+               };
 
-         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 = '';
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s), e);
+               };
 
-             if (name !== '') {
-               string += ':';
-             }
+               this.raw = function (s) {
+                 return rstr(s);
+               };
 
-             return string += ' ' + name;
-           });
-           items = itemsEnter.merge(items); // Download changeset link
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d));
+               };
 
-           var changeset = new osmChangeset().update({
-             id: undefined
-           });
-           var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
-           delete changeset.id; // Export without chnageset_id
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };
 
-           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.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 (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').html(_t.html('commit.download_changes'));
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * @description Enable/disable uppercase hexadecimal returned string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-           function mouseover(d) {
-             if (d.entity) {
-               context.surface().selectAll(utilEntityOrMemberSelector([d.entity.id], context.graph())).classed('hover', true);
-             }
-           }
 
-           function mouseout() {
-             context.surface().selectAll('.hover').classed('hover', false);
-           }
+               this.setUpperCase = function (a) {
+                 if (typeof a === 'boolean') {
+                   hexcase = a;
+                 }
 
-           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);
-             }
-           }
-         }
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {string} Pad
+                * @return {Object} this
+                * @public
+                */
 
-         return section;
-       }
 
-       function uiCommitWarnings(context) {
-         function commitWarnings(selection) {
-           var issuesBySeverity = context.validator().getIssuesBySeverity({
-             what: 'edited',
-             where: 'all',
-             includeDisabledRules: true
-           });
+               this.setPad = function (a) {
+                 b64pad = a || b64pad;
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-           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 commitWarnings;
-       }
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }
 
-       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
+                 return this;
+               }; // private methods
 
-       var hashtagRegex = /(#[^\u2000-\u206F\u2E00-\u2E7F\s\\'!"#$%()*,.\/:;<=>?@\[\]^`{|}~]+)/g;
-       function uiCommit(context) {
-         var dispatch$1 = dispatch('cancel');
+               /**
+                * Calculate the SHA-512 of a raw string
+                */
 
-         var _userDetails;
 
-         var _selection;
+               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)
+                */
 
-         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);
 
-         function commit(selection) {
-           _selection = selection; // Initialize changeset if one does not exist yet.
+               function rstr_hmac(key, data) {
+                 var bkey, ipad, opad, i, hash;
+                 key = utf8 ? utf8Encode(key) : key;
+                 data = utf8 ? utf8Encode(data) : data;
+                 bkey = rstr2binb(key);
 
-           if (!context.changeset) initChangeset();
-           loadDerivedChangesetTags();
-           selection.call(render);
-         }
+                 if (bkey.length > 16) {
+                   bkey = binb(bkey, key.length * 8);
+                 }
 
-         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
+                 ipad = Array(16), opad = Array(16);
 
-           if (commentDate > currDate || currDate - commentDate > cutoff) {
-             corePreferences('comment', null);
-             corePreferences('hashtags', null);
-             corePreferences('source', null);
-           } // load in explicitly-set values, if any
+                 for (i = 0; i < 16; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }
 
+                 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
+                */
 
-           if (context.defaultChangesetComment()) {
-             corePreferences('comment', context.defaultChangesetComment());
-             corePreferences('commentDate', Date.now());
-           }
 
-           if (context.defaultChangesetSource()) {
-             corePreferences('source', context.defaultChangesetSource());
-             corePreferences('commentDate', Date.now());
-           }
+               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 */
 
-           if (context.defaultChangesetHashtags()) {
-             corePreferences('hashtags', context.defaultChangesetHashtags());
-             corePreferences('commentDate', Date.now());
-           }
+                 x[len >> 5] |= 0x80 << 24 - len % 32;
+                 x[(len + 64 >> 9 << 4) + 15] = len;
 
-           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
+                 for (i = 0; i < x.length; i += 16) {
+                   olda = a;
+                   oldb = b;
+                   oldc = c;
+                   oldd = d;
+                   olde = e;
 
-           findHashtags(tags, true);
-           var hashtags = corePreferences('hashtags');
+                   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);
+                     }
 
-           if (hashtags) {
-             tags.hashtags = hashtags;
-           }
+                     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;
+                   }
 
-           var source = corePreferences('source');
+                   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 (source) {
-             tags.source = source;
-           }
+                 return Array(a, b, c, d, e);
+               }
+               /**
+                * Perform the appropriate triplet combination function for the current
+                * iteration
+                */
 
-           var photoOverlaysUsed = context.history().photoOverlaysUsed();
 
-           if (photoOverlaysUsed.length) {
-             var sources = (tags.source || '').split(';'); // include this tag for any photo layer
+               function sha1_ft(t, b, c, d) {
+                 if (t < 20) {
+                   return b & c | ~b & d;
+                 }
 
-             if (sources.indexOf('streetlevel imagery') === -1) {
-               sources.push('streetlevel imagery');
-             } // add the photo overlays used during editing as sources
+                 if (t < 40) {
+                   return b ^ c ^ d;
+                 }
 
+                 if (t < 60) {
+                   return b & c | b & d | c & d;
+                 }
 
-             photoOverlaysUsed.forEach(function (photoOverlay) {
-               if (sources.indexOf(photoOverlay) === -1) {
-                 sources.push(photoOverlay);
+                 return b ^ c ^ d;
                }
-             });
-             tags.source = context.cleanTagValue(sources.join(';'));
-           }
+               /**
+                * Determine the appropriate additive constant for the current iteration
+                */
 
-           context.changeset = new osmChangeset({
-             tags: tags
-           });
-         } // Calculates read-only metadata tags based on the user's editing session and applies
-         // them to the changeset.
 
+               function sha1_kt(t) {
+                 return t < 20 ? 1518500249 : t < 40 ? 1859775393 : t < 60 ? -1894007588 : -899497514;
+               }
+             },
 
-         function loadDerivedChangesetTags() {
-           var osm = context.connection();
-           if (!osm) return;
-           var tags = Object.assign({}, context.changeset.tags); // shallow copy
-           // assign tags for imagery used
+             /**
+              * @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 imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
-           tags.imagery_used = imageryUsed || 'None'; // assign tags for closed issues and notes
+               /* base-64 pad character. Default '=' for strict RFC compliance   */
+               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-           var osmClosed = osm.getClosedIDs();
-           var itemType;
+               /* enable/disable utf8 encoding */
+               sha256_K;
+               /* privileged (public) methods */
 
-           if (osmClosed.length) {
-             tags['closed:note'] = context.cleanTagValue(osmClosed.join(';'));
-           }
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s, utf8));
+               };
 
-           if (services.keepRight) {
-             var krClosed = services.keepRight.getClosedIDs();
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s, utf8), b64pad);
+               };
 
-             if (krClosed.length) {
-               tags['closed:keepright'] = context.cleanTagValue(krClosed.join(';'));
-             }
-           }
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s, utf8), e);
+               };
 
-           if (services.improveOSM) {
-             var iOsmClosed = services.improveOSM.getClosedCounts();
+               this.raw = function (s) {
+                 return rstr(s, utf8);
+               };
 
-             for (itemType in iOsmClosed) {
-               tags['closed:improveosm:' + itemType] = context.cleanTagValue(iOsmClosed[itemType].toString());
-             }
-           }
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d));
+               };
 
-           if (services.osmose) {
-             var osmoseClosed = services.osmose.getClosedCounts();
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };
 
-             for (itemType in osmoseClosed) {
-               tags['closed:osmose:' + itemType] = context.cleanTagValue(osmoseClosed[itemType].toString());
-             }
-           } // remove existing issue counts
+               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
+                */
 
 
-           for (var key in tags) {
-             if (key.match(/(^warnings:)|(^resolved:)/)) {
-               delete tags[key];
-             }
-           }
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * Enable/disable uppercase hexadecimal returned string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-           function addIssueCounts(issues, prefix) {
-             var issuesByType = utilArrayGroupBy(issues, 'type');
 
-             for (var issueType in issuesByType) {
-               var issuesOfType = issuesByType[issueType];
+               this.setUpperCase = function (a) {
 
-               if (issuesOfType[0].subtype) {
-                 var issuesBySubtype = utilArrayGroupBy(issuesOfType, 'subtype');
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {string} Pad
+                * @return {Object} this
+                * @public
+                */
 
-                 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
 
+               this.setPad = function (a) {
+                 b64pad = a || b64pad;
+                 return this;
+               };
+               /**
+                * Defines a base64 pad string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-           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
-           });
-         }
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }
 
-         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
+                 return this;
+               }; // private methods
 
-           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
+               /**
+                * Calculate the SHA-512 of a raw string
+                */
 
-           body.call(commitWarnings); // Upload Explanation
 
-           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]);
+               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)
+                */
 
-           if (prose.enter().size()) {
-             // first time, make sure to update user details in prose
-             _userDetails = null;
-           }
 
-           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
+               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);
 
-           osm.userDetails(function (err, user) {
-             if (err) return;
-             if (_userDetails === user) return; // no change
+                 if (bkey.length > 16) {
+                   bkey = binb(bkey, key.length * 8);
+                 }
 
-             _userDetails = user;
-             var userLink = select(document.createElement('div'));
+                 for (; i < 16; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }
 
-             if (user.image_url) {
-               userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
-             }
+                 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
+                */
 
-             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
 
-           var requestReview = saveSection.selectAll('.request-review').data([0]); // Enter
+               function sha256_S(X, n) {
+                 return X >>> n | X << 32 - n;
+               }
 
-           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
+               function sha256_R(X, n) {
+                 return X >>> n;
+               }
 
-           requestReview = requestReview.merge(requestReviewEnter);
-           var requestReviewInput = requestReview.selectAll('input').property('checked', isReviewRequested(context.changeset.tags)).on('change', toggleRequestReview); // Buttons
+               function sha256_Ch(x, y, z) {
+                 return x & y ^ ~x & z;
+               }
 
-           var buttonSection = saveSection.selectAll('.buttons').data([0]); // enter
+               function sha256_Maj(x, y, z) {
+                 return x & y ^ x & z ^ y & z;
+               }
 
-           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
+               function sha256_Sigma0256(x) {
+                 return sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22);
+               }
 
-           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
+               function sha256_Sigma1256(x) {
+                 return sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25);
+               }
 
-               for (var key in context.changeset.tags) {
-                 // remove any empty keys before upload
-                 if (!key) delete context.changeset.tags[key];
+               function sha256_Gamma0256(x) {
+                 return sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3);
                }
 
-               context.uploader().save(context.changeset);
-             }
-           }); // remove any existing tooltip
+               function sha256_Gamma1256(x) {
+                 return sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10);
+               }
 
-           uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));
+               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];
 
-           if (uploadBlockerTooltipText) {
-             buttonSection.selectAll('.save-button').call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
-           } // Raw Tag Editor
+               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;
 
-           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
+                 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];
 
-           changesSection.call(commitChanges.render);
+                   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 toggleRequestReview() {
-             var rr = requestReviewInput.property('checked');
-             updateChangeset({
-               review_requested: rr ? 'yes' : undefined
-             });
-             tagSection.call(rawTagEditor.tags(Object.assign({}, context.changeset.tags)) // shallow copy
-             .render);
-           }
-         }
+                     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 getUploadBlockerMessage() {
-           var errors = context.validator().getIssuesBySeverity({
-             what: 'edited',
-             where: 'all'
-           }).error;
+                   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]);
+                 }
 
-           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;
+                 return HASH;
+               }
+             },
 
-             if (!hasChangesetComment) {
-               return _t('commit.comment_needed_message');
-             }
-           }
+             /**
+              * @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 null;
-         }
+               var /* hexadecimal output case format. false - lowercase; true - uppercase  */
+               b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
 
-         function changeTags(_, changed, onInput) {
-           if (changed.hasOwnProperty('comment')) {
-             if (changed.comment === undefined) {
-               changed.comment = '';
-             }
+               /* base-64 pad character. Default '=' for strict RFC compliance   */
+               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-             if (!onInput) {
-               corePreferences('comment', changed.comment);
-               corePreferences('commentDate', Date.now());
-             }
-           }
+               /* enable/disable utf8 encoding */
+               sha512_k;
+               /* privileged (public) methods */
 
-           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`
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s));
+               };
 
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s), b64pad);
+               };
 
-           updateChangeset(changed, onInput);
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s), e);
+               };
 
-           if (_selection) {
-             _selection.call(render);
-           }
-         }
+               this.raw = function (s) {
+                 return rstr(s);
+               };
 
-         function findHashtags(tags, commentOnly) {
-           var detectedHashtags = commentHashtags();
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d));
+               };
 
-           if (detectedHashtags.length) {
-             // always remove stored hashtags if there are hashtags in the comment - #4304
-             corePreferences('hashtags', null);
-           }
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };
 
-           if (!detectedHashtags.length || !commentOnly) {
-             detectedHashtags = detectedHashtags.concat(hashtagHashtags());
-           }
+               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 allLowerCase = new Set();
-           return detectedHashtags.filter(function (hashtag) {
-             // Compare tags as lowercase strings, but keep original case tags
-             var lowerCase = hashtag.toLowerCase();
 
-             if (!allLowerCase.has(lowerCase)) {
-               allLowerCase.add(lowerCase);
-               return true;
-             }
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * @description Enable/disable uppercase hexadecimal returned string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-             return false;
-           }); // Extract hashtags from `comment`
 
-           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`
+               this.setUpperCase = function (a) {
+
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {string} Pad
+                * @return {Object} this
+                * @public
+                */
 
 
-           function hashtagHashtags() {
-             var matches = (tags.hashtags || '').split(/[,;\s]+/).map(function (s) {
-               if (s[0] !== '#') {
-                 s = '#' + s;
-               } // prepend '#'
+               this.setPad = function (a) {
+                 b64pad = a || b64pad;
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
 
-               var matched = s.match(hashtagRegex);
-               return matched && matched[0];
-             }).filter(Boolean); // exclude falsy
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }
 
-             return matches || [];
-           }
-         }
+                 return this;
+               };
+               /* private methods */
 
-         function isReviewRequested(tags) {
-           var rr = tags.review_requested;
-           if (rr === undefined) return false;
-           rr = rr.trim().toLowerCase();
-           return !(rr === '' || rr === 'no');
-         }
+               /**
+                * Calculate the SHA-512 of a raw string
+                */
 
-         function updateChangeset(changed, onInput) {
-           var tags = Object.assign({}, context.changeset.tags); // shallow copy
 
-           Object.keys(changed).forEach(function (k) {
-             var v = changed[k];
-             k = context.cleanTagKey(k);
-             if (readOnlyTags.indexOf(k) !== -1) return;
+               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)
+                */
 
-             if (v === undefined) {
-               delete tags[k];
-             } else if (onInput) {
-               tags[k] = v;
-             } else {
-               tags[k] = context.cleanTagValue(v);
-             }
-           });
 
-           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 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 (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
+                 if (bkey.length > 32) {
+                   bkey = binb(bkey, key.length * 8);
+                 }
 
+                 for (; i < 32; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }
 
-           if (_userDetails && _userDetails.changesets_count !== undefined) {
-             var changesetsCount = parseInt(_userDetails.changesets_count, 10) + 1; // #4283
+                 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
+                */
 
-             tags.changesets_count = String(changesetsCount); // first 100 edits - new user
 
-             if (changesetsCount <= 100) {
-               var s;
-               s = corePreferences('walkthrough_completed');
+               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);
 
-               if (s) {
-                 tags['ideditor:walkthrough_completed'] = s;
-               }
+                 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)];
+                 }
 
-               s = corePreferences('walkthrough_progress');
+                 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.
 
-               if (s) {
-                 tags['ideditor:walkthrough_progress'] = s;
-               }
 
-               s = corePreferences('walkthrough_started');
+                 x[len >> 5] |= 0x80 << 24 - (len & 0x1f);
+                 x[(len + 128 >> 10 << 5) + 31] = len;
+                 l = x.length;
 
-               if (s) {
-                 tags['ideditor:walkthrough_started'] = s;
-               }
-             }
-           } else {
-             delete tags.changesets_count;
-           }
+                 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 (!fastDeepEqual(context.changeset.tags, tags)) {
-             context.changeset = context.changeset.update({
-               tags: tags
-             });
-           }
-         }
+                   for (j = 0; j < 16; j += 1) {
+                     W[j].h = x[i + 2 * j];
+                     W[j].l = x[i + 2 * j + 1];
+                   }
 
-         commit.reset = function () {
-           context.changeset = null;
-         };
+                   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
 
-         return utilRebind(commit, dispatch$1, 'on');
-       }
+                     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]);
+                   }
 
-       var globalIsFinite = global_1.isFinite;
+                   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
 
-       // `Number.isFinite` method
-       // https://tc39.es/ecma262/#sec-number.isfinite
-       var numberIsFinite = Number.isFinite || function isFinite(it) {
-         return typeof it == 'number' && globalIsFinite(it);
-       };
+                     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
 
-       // `Number.isFinite` method
-       // https://tc39.es/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
-       };
+                     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
 
-       var geometry_1 = geometry;
-       var ring = ringArea;
+                     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);
+                   }
 
-       function geometry(_) {
-         var area = 0,
-             i;
+                   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
 
-         switch (_.type) {
-           case 'Polygon':
-             return polygonArea(_.coordinates);
 
-           case 'MultiPolygon':
-             for (i = 0; i < _.coordinates.length; i++) {
-               area += polygonArea(_.coordinates[i]);
-             }
+                 for (i = 0; i < 8; i += 1) {
+                   hash[2 * i] = H[i].h;
+                   hash[2 * i + 1] = H[i].l;
+                 }
 
-             return area;
+                 return hash;
+               } //A constructor for 64-bit numbers
 
-           case 'Point':
-           case 'MultiPoint':
-           case 'LineString':
-           case 'MultiLineString':
-             return 0;
 
-           case 'GeometryCollection':
-             for (i = 0; i < _.geometries.length; i++) {
-               area += geometry(_.geometries[i]);
-             }
+               function int64(h, l) {
+                 this.h = h;
+                 this.l = l; //this.toString = int64toString;
+               } //Copies src into dst, assuming both are 64-bit numbers
 
-             return area;
-         }
-       }
 
-       function polygonArea(coords) {
-         var area = 0;
+               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
 
-         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]));
-           }
-         }
+               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 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 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 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;
-             }
+               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
 
-             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;
-         }
+               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.
 
-         return area;
-       }
 
-       function rad(_) {
-         return _ * Math.PI / 180;
-       }
+               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 geojsonArea = {
-         geometry: geometry_1,
-         ring: ring
-       };
 
-       var validateCenter_1 = function validateCenter(center) {
-         var validCenterLengths = [2, 3];
+               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;
+               }
+             },
 
-         if (!Array.isArray(center) || !validCenterLengths.includes(center.length)) {
-           throw new Error("ERROR! Center has to be an array of length two or three");
-         }
+             /**
+              * @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 _center = _slicedToArray(center, 2),
-             lng = _center[0],
-             lat = _center[1];
+               var /* hexadecimal output case format. false - lowercase; true - uppercase  */
+               b64pad = options && typeof options.pad === 'string' ? options.pa : '=',
 
-         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)));
-         }
+               /* base-64 pad character. Default '=' for strict RFC compliance   */
+               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-         if (lng > 180 || lng < -180) {
-           throw new Error("ERROR! Longitude has to be between -180 and 180 but was ".concat(lng));
-         }
+               /* 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 */
 
-         if (lat > 90 || lat < -90) {
-           throw new Error("ERROR! Latitude has to be between -90 and 90 but was ".concat(lat));
-         }
-       };
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s));
+               };
 
-       var validateCenter = {
-         validateCenter: validateCenter_1
-       };
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s), b64pad);
+               };
 
-       var validateRadius_1 = function validateRadius(radius) {
-         if (typeof radius !== "number") {
-           throw new Error("ERROR! Radius has to be a positive number but was: ".concat(_typeof(radius)));
-         }
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s), e);
+               };
 
-         if (radius <= 0) {
-           throw new Error("ERROR! Radius has to be a positive number but was: ".concat(radius));
-         }
-       };
+               this.raw = function (s) {
+                 return rstr(s);
+               };
 
-       var validateRadius = {
-         validateRadius: validateRadius_1
-       };
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d));
+               };
 
-       var validateNumberOfEdges_1 = 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));
-         }
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };
 
-         if (numberOfEdges < 3) {
-           throw new Error("ERROR! Number of edges has to be at least 3 but was: ".concat(numberOfEdges));
-         }
-       };
+               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 validateNumberOfEdges = {
-         validateNumberOfEdges: validateNumberOfEdges_1
-       };
 
-       var validateEarthRadius_1 = 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));
-         }
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * @description Enable/disable uppercase hexadecimal returned string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-         if (earthRadius <= 0) {
-           throw new Error("ERROR! Earth radius has to be a positive number but was: ".concat(earthRadius));
-         }
-       };
 
-       var validateEarthRadius = {
-         validateEarthRadius: validateEarthRadius_1
-       };
+               this.setUpperCase = function (a) {
 
-       var validateBearing_1 = 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));
-         }
-       };
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {string} Pad
+                * @return {Object} this
+                * @public
+                */
 
-       var validateBearing = {
-         validateBearing: validateBearing_1
-       };
 
-       var validateCenter$1 = validateCenter.validateCenter;
-       var validateRadius$1 = validateRadius.validateRadius;
-       var validateNumberOfEdges$1 = validateNumberOfEdges.validateNumberOfEdges;
-       var validateEarthRadius$1 = validateEarthRadius.validateEarthRadius;
-       var validateBearing$1 = validateBearing.validateBearing;
+               this.setPad = function (a) {
+                 if (typeof a !== 'undefined') {
+                   b64pad = a;
+                 }
 
-       function validateInput(_ref) {
-         var center = _ref.center,
-             radius = _ref.radius,
-             numberOfEdges = _ref.numberOfEdges,
-             earthRadius = _ref.earthRadius,
-             bearing = _ref.bearing;
-         validateCenter$1(center);
-         validateRadius$1(radius);
-         validateNumberOfEdges$1(numberOfEdges);
-         validateEarthRadius$1(earthRadius);
-         validateBearing$1(bearing);
-       }
-
-       var validateCenter_1$1 = validateCenter$1;
-       var validateRadius_1$1 = validateRadius$1;
-       var validateNumberOfEdges_1$1 = validateNumberOfEdges$1;
-       var validateEarthRadius_1$1 = validateEarthRadius$1;
-       var validateBearing_1$1 = validateBearing$1;
-       var validateInput_1 = validateInput;
-       var inputValidation = {
-         validateCenter: validateCenter_1$1,
-         validateRadius: validateRadius_1$1,
-         validateNumberOfEdges: validateNumberOfEdges_1$1,
-         validateEarthRadius: validateEarthRadius_1$1,
-         validateBearing: validateBearing_1$1,
-         validateInput: validateInput_1
-       };
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-       var validateInput$1 = inputValidation.validateInput;
-       var defaultEarthRadius = 6378137; // equatorial Earth radius
 
-       function toRadians(angleInDegrees) {
-         return angleInDegrees * Math.PI / 180;
-       }
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }
 
-       function toDegrees(angleInRadians) {
-         return angleInRadians * 180 / Math.PI;
-       }
+                 return this;
+               };
+               /* private methods */
 
-       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)];
-       }
+               /**
+                * Calculate the rmd160 of a raw string
+                */
 
-       var circleToPolygon = function circleToPolygon(center, radius, options) {
-         var n = getNumberOfEdges(options);
-         var earthRadius = getEarthRadius(options);
-         var bearing = getBearing(options); // validateInput() throws error on invalid input and do nothing on valid input
 
-         validateInput$1({
-           center: center,
-           radius: radius,
-           numberOfEdges: n,
-           earthRadius: earthRadius,
-           bearing: bearing
-         });
-         var start = toRadians(bearing);
-         var coordinates = [];
+               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)
+                */
 
-         for (var i = 0; i < n; ++i) {
-           coordinates.push(offset(center, radius, earthRadius, start + 2 * Math.PI * -i / n));
-         }
 
-         coordinates.push(coordinates[0]);
-         return {
-           type: "Polygon",
-           coordinates: [coordinates]
-         };
-       };
+               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);
 
-       function getNumberOfEdges(options) {
-         if (options === undefined) {
-           return 32;
-         } else if (isObjectNotArray(options)) {
-           var numberOfEdges = options.numberOfEdges;
-           return numberOfEdges === undefined ? 32 : numberOfEdges;
-         }
+                 if (bkey.length > 16) {
+                   bkey = binl(bkey, key.length * 8);
+                 }
 
-         return options;
-       }
+                 for (i = 0; i < 16; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }
 
-       function getEarthRadius(options) {
-         if (options === undefined) {
-           return defaultEarthRadius;
-         } else if (isObjectNotArray(options)) {
-           var earthRadius = options.earthRadius;
-           return earthRadius === undefined ? defaultEarthRadius : earthRadius;
-         }
+                 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
+                */
 
-         return defaultEarthRadius;
-       }
 
-       function getBearing(options) {
-         if (options === undefined) {
-           return 0;
-         } else if (isObjectNotArray(options)) {
-           var bearing = options.bearing;
-           return bearing === undefined ? 0 : bearing;
-         }
+               function binl2rstr(input) {
+                 var i,
+                     output = '',
+                     l = input.length * 32;
 
-         return 0;
-       }
+                 for (i = 0; i < l; i += 8) {
+                   output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+                 }
 
-       function isObjectNotArray(argument) {
-         return _typeof(argument) === "object" && !Array.isArray(argument);
-       }
+                 return output;
+               }
+               /**
+                * Calculate the RIPE-MD160 of an array of little-endian words, and a bit length.
+                */
 
-       // `Number.EPSILON` constant
-       // https://tc39.es/ecma262/#sec-number.epsilon
-       _export({ target: 'Number', stat: true }, {
-         EPSILON: Math.pow(2, -52)
-       });
 
-       /**
-        * splaytree v3.1.0
-        * Fast Splay tree for Node and browser
-        *
-        * @author Alexander Milevski <info@w8r.name>
-        * @license MIT
-        * @preserve
-        */
-       var Node$1 =
-       /** @class */
-       function () {
-         function Node(key, data) {
-           this.next = null;
-           this.key = key;
-           this.data = data;
-           this.left = null;
-           this.right = null;
-         }
+               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 */
 
-         return Node;
-       }();
-       /* follows "An implementation of top-down splaying"
-        * by D. Sleator <sleator@cs.cmu.edu> March 1992
-        */
+                 x[len >> 5] |= 0x80 << len % 32;
+                 x[(len + 64 >>> 9 << 4) + 14] = len;
+                 l = x.length;
 
+                 for (i = 0; i < l; i += 16) {
+                   A1 = A2 = h0;
+                   B1 = B2 = h1;
+                   C1 = C2 = h2;
+                   D1 = D2 = h3;
+                   E1 = E2 = h4;
 
-       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.
-        */
+                   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 splay(i, t, comparator) {
-         var N = new Node$1(null, null);
-         var l = N;
-         var r = N;
+                 return [h0, h1, h2, h3, h4];
+               } // specific algorithm methods
 
-         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) {
+               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';
+               }
 
-             if (comparator(i, t.left.key) < 0) {
-               var y = t.left;
-               /* rotate right */
+               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';
+               }
 
-               t.left = y.right;
-               y.right = t;
-               t = y;
-               if (t.left === null) break;
+               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
 
-             r.left = t;
-             /* link right */
+           (function (window, undefined$1) {
+             var freeExports = false;
 
-             r = t;
-             t = t.left; //} else if (i > t.key) {
-           } else if (cmp > 0) {
-             if (t.right === null) break; //if (i > t.right.key) {
+             {
+               freeExports = exports;
 
-             if (comparator(i, t.right.key) > 0) {
-               var y = t.right;
-               /* rotate left */
+               if (exports && _typeof(commonjsGlobal) === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
+                 window = commonjsGlobal;
+               }
+             }
 
-               t.right = y.left;
-               y.left = t;
-               t = y;
-               if (t.right === null) break;
+             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
 
-             l.right = t;
-             /* link left */
+       })(hashes$1, hashes$1.exports);
 
-             l = t;
-             t = t.right;
-           } else break;
-         }
-         /* assemble */
+       var hashes = hashes$1.exports,
+           sha1 = new hashes.SHA1(); // # xtend
 
+       var hasOwnProperty$1 = Object.prototype.hasOwnProperty;
 
-         l.right = t.left;
-         r.left = t.right;
-         t.left = N.right;
-         t.right = N.left;
-         return t;
-       }
+       function xtend$1() {
+         var target = {};
 
-       function insert(i, data, t, comparator) {
-         var node = new Node$1(i, data);
+         for (var i = 0; i < arguments.length; i++) {
+           var source = arguments[i];
 
-         if (t === null) {
-           node.left = node.right = null;
-           return node;
+           for (var key in source) {
+             if (hasOwnProperty$1.call(source, key)) {
+               target[key] = source[key];
+             }
+           }
          }
 
-         t = splay(i, t, comparator);
-         var cmp = comparator(i, t.key);
+         return target;
+       }
 
-         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;
-         }
+       var ohauth$1 = {};
 
-         return node;
-       }
+       ohauth$1.qsString = function (obj) {
+         return Object.keys(obj).sort().map(function (key) {
+           return ohauth$1.percentEncode(key) + '=' + ohauth$1.percentEncode(obj[key]);
+         }).join('&');
+       };
 
-       function split$2(key, v, comparator) {
-         var left = null;
-         var right = null;
+       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;
+         }, {});
+       };
 
-         if (v) {
-           v = splay(key, v, comparator);
-           var cmp = comparator(v.key, key);
+       ohauth$1.rawxhr = function (method, url, data, headers, callback) {
+         var xhr = new XMLHttpRequest(),
+             twoHundred = /^20\d$/;
 
-           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;
+         xhr.onreadystatechange = function () {
+           if (4 === xhr.readyState && 0 !== xhr.status) {
+             if (twoHundred.test(xhr.status)) callback(null, xhr);else return callback(xhr, null);
            }
-         }
-
-         return {
-           left: left,
-           right: right
          };
-       }
-
-       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
-        */
 
+         xhr.onerror = function (e) {
+           return callback(e, null);
+         };
 
-       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$1;
-           }
+         xhr.open(method, url, true);
 
-           this._root = null;
-           this._size = 0;
-           this._comparator = comparator;
+         for (var h in headers) {
+           xhr.setRequestHeader(h, headers[h]);
          }
-         /**
-          * Inserts a key, allows duplicates
-          */
 
+         xhr.send(data);
+         return xhr;
+       };
 
-         Tree.prototype.insert = function (key, data) {
-           this._size++;
-           return this._root = insert(key, data, this._root, this._comparator);
+       ohauth$1.xhr = function (method, url, auth, data, options, callback) {
+         var headers = options && options.header || {
+           'Content-Type': 'application/x-www-form-urlencoded'
          };
-         /**
-          * Adds a key, if it is not present in the tree
-          */
-
+         headers.Authorization = 'OAuth ' + ohauth$1.authHeader(auth);
+         return ohauth$1.rawxhr(method, url, data, headers, callback);
+       };
 
-         Tree.prototype.add = function (key, data) {
-           var node = new Node$1(key, data);
+       ohauth$1.nonce = function () {
+         for (var o = ''; o.length < 6;) {
+           o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
+         }
 
-           if (this._root === null) {
-             node.left = node.right = null;
-             this._size++;
-             this._root = node;
-           }
+         return o;
+       };
 
-           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;
-             }
+       ohauth$1.authHeader = function (obj) {
+         return Object.keys(obj).sort().map(function (key) {
+           return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
+         }).join(', ');
+       };
 
-             this._size++;
-             this._root = node;
-           }
-           return this._root;
-         };
-         /**
-          * @param  {Key} key
-          * @return {Node|null}
-          */
+       ohauth$1.timestamp = function () {
+         return ~~(+new Date() / 1000);
+       };
 
+       ohauth$1.percentEncode = function (s) {
+         return encodeURIComponent(s).replace(/\!/g, '%21').replace(/\'/g, '%27').replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
+       };
 
-         Tree.prototype.remove = function (key) {
-           this._root = this._remove(key, this._root, this._comparator);
-         };
-         /**
-          * Deletes i from the tree if it's there
-          */
+       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);
+       };
+       /**
+        * 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.
+        */
 
-         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;
-             }
+       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();
 
-             this._size--;
-             return x;
+           if (typeof extra_params === 'string' && extra_params.length > 0) {
+             extra_params = ohauth$1.stringQs(extra_params);
            }
 
-           return t;
-           /* It wasn't there */
+           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);
          };
-         /**
-          * Removes and returns the node with smallest key
-          */
-
+       };
 
-         Tree.prototype.pop = function () {
-           var node = this._root;
+       var ohauth_1 = ohauth$1;
 
-           if (node) {
-             while (node.left) {
-               node = node.left;
-             }
+       var resolveUrl$1 = {exports: {}};
 
-             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
-             };
+       (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;
 
-           return null;
-         };
-         /**
-          * Find without splaying
-          */
+             if (numUrls === 0) {
+               throw new Error("resolveUrl requires at least one argument; got none.");
+             }
 
+             var base = document.createElement("base");
+             base.href = arguments[0];
 
-         Tree.prototype.findStatic = function (key) {
-           var current = this._root;
-           var compare = this._comparator;
+             if (numUrls === 1) {
+               return base.href;
+             }
 
-           while (current) {
-             var cmp = compare(key, current.key);
-             if (cmp === 0) return current;else if (cmp < 0) current = current.left;else current = current.right;
-           }
+             var head = document.getElementsByTagName("head")[0];
+             head.insertBefore(base, head.firstChild);
+             var a = document.createElement("a");
+             var resolved;
 
-           return null;
-         };
+             for (var index = 1; index < numUrls; index++) {
+               a.href = arguments[index];
+               resolved = a.href;
+               base.href = resolved;
+             }
 
-         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;
+             head.removeChild(base);
+             return resolved;
            }
 
-           return this._root;
-         };
+           return resolveUrl;
+         });
+       })(resolveUrl$1);
 
-         Tree.prototype.contains = function (key) {
-           var current = this._root;
-           var compare = this._comparator;
+       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
+       };
 
-           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 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;
+               });
+             }
 
-           return false;
-         };
+             return obj;
+           };
+         }
+       }
 
-         Tree.prototype.forEach = function (visitor, ctx) {
-           var current = this._root;
-           var Q = [];
-           /* Initialize stack s */
+       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
 
-           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 function create(obj, assignProps1, assignProps2, etc) {
+             var assignArgsList = slice$1(arguments, 1);
+             F.prototype = obj;
+             return assign.apply(this, [new F()].concat(assignArgsList));
+           };
+         }
+       }
 
-           return this;
+       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));
          };
-         /**
-          * Walk key range from `low` to `high`. Stops if `fn` returns a value.
-          */
+       }
 
+       function slice$1(arr, index) {
+         return Array.prototype.slice.call(arr, index || 0);
+       }
 
-         Tree.prototype.range = function (low, high, fn, ctx) {
-           var Q = [];
-           var compare = this._comparator;
-           var node = this._root;
-           var cmp;
+       function each$7(obj, fn) {
+         pluck$1(obj, function (val, key) {
+           fn(val, key);
+           return false;
+         });
+       }
 
-           while (Q.length !== 0 || node) {
-             if (node) {
-               Q.push(node);
-               node = node.left;
-             } else {
-               node = Q.pop();
-               cmp = compare(node.key, high);
+       function map(obj, fn) {
+         var res = isList$1(obj) ? [] : {};
+         pluck$1(obj, function (v, k) {
+           res[k] = fn(v, k);
+           return false;
+         });
+         return res;
+       }
 
-               if (cmp > 0) {
-                 break;
-               } else if (compare(node.key, low) >= 0) {
-                 if (fn.call(ctx, node)) return this; // stop if smth is returned
+       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];
+             }
+           }
+         } else {
+           for (var key in obj) {
+             if (obj.hasOwnProperty(key)) {
+               if (fn(obj[key], key)) {
+                 return obj[key];
                }
-
-               node = node.right;
              }
            }
+         }
+       }
 
-           return this;
-         };
-         /**
-          * Returns array of keys
-          */
+       function isList$1(val) {
+         return val != null && typeof val != 'function' && typeof val.length == 'number';
+       }
 
+       function isFunction$1(val) {
+         return val && {}.toString.call(val) === '[object Function]';
+       }
 
-         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
-          */
+       function isObject$1(val) {
+         return val && {}.toString.call(val) === '[object Object]';
+       }
 
+       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);
+           }
 
-         Tree.prototype.values = function () {
-           var values = [];
-           this.forEach(function (_a) {
-             var data = _a.data;
-             return values.push(data);
+           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, ''));
            });
-           return values;
-         };
+         },
+         // 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);
+         }
+       };
 
-         Tree.prototype.min = function () {
-           if (this._root) return this.minNode(this._root).key;
-           return null;
-         };
+       function _warn() {
+         var _console = typeof console == 'undefined' ? null : console;
 
-         Tree.prototype.max = function () {
-           if (this._root) return this.maxNode(this._root).key;
-           return null;
-         };
+         if (!_console) {
+           return;
+         }
 
-         Tree.prototype.minNode = function (t) {
-           if (t === void 0) {
-             t = this._root;
-           }
+         var fn = _console.warn ? _console.warn : _console.log;
+         fn.apply(_console, arguments);
+       }
 
-           if (t) while (t.left) {
-             t = t.left;
-           }
-           return t;
-         };
+       function _createStore(storages, plugins, namespace) {
+         if (!namespace) {
+           namespace = '';
+         }
 
-         Tree.prototype.maxNode = function (t) {
-           if (t === void 0) {
-             t = this._root;
-           }
+         if (storages && !isList(storages)) {
+           storages = [storages];
+         }
 
-           if (t) while (t.right) {
-             t = t.right;
-           }
-           return t;
-         };
-         /**
-          * Returns node at given index
-          */
+         if (plugins && !isList(plugins)) {
+           plugins = [plugins];
+         }
 
+         var namespacePrefix = namespace ? '__storejs_' + namespace + '_' : '';
+         var namespaceRegexp = namespace ? new RegExp('^' + namespacePrefix) : null;
+         var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash
 
-         Tree.prototype.at = function (index) {
-           var current = this._root;
-           var done = false;
-           var i = 0;
-           var Q = [];
+         if (!legalNamespaces.test(namespace)) {
+           throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes');
+         }
 
-           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 _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];
 
-           return null;
-         };
+             this[propName] = function pluginFn() {
+               var args = slice(arguments, 0);
+               var self = this; // super_fn calls the old function which was overwritten by
+               // this mixin.
 
-         Tree.prototype.next = function (d) {
-           var root = this._root;
-           var successor = null;
+               function super_fn() {
+                 if (!oldFn) {
+                   return;
+                 }
 
-           if (d.right) {
-             successor = d.right;
+                 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.
 
-             while (successor.left) {
-               successor = successor.left;
+
+               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
+
+
+             var val = '';
+
+             try {
+               val = JSON.parse(strVal);
+             } catch (e) {
+               val = strVal;
              }
 
-             return successor;
-           }
+             return val !== undefined ? val : defaultVal;
+           },
+           _addStorage: function _addStorage(storage) {
+             if (this.enabled) {
+               return;
+             }
 
-           var comparator = this._comparator;
+             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.
 
-           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;
-           }
+             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.
 
-           return successor;
-         };
 
-         Tree.prototype.prev = function (d) {
-           var root = this._root;
-           var predecessor = null;
+             var seenPlugin = pluck(this.plugins, function (seenPlugin) {
+               return plugin === seenPlugin;
+             });
 
-           if (d.left !== null) {
-             predecessor = d.left;
+             if (seenPlugin) {
+               return;
+             }
 
-             while (predecessor.right) {
-               predecessor = predecessor.right;
+             this.plugins.push(plugin); // Check that the plugin is properly formed
+
+             if (!isFunction(plugin)) {
+               throw new Error('Plugins must be function values that return objects');
              }
 
-             return predecessor;
-           }
+             var pluginProperties = plugin.call(this);
 
-           var comparator = this._comparator;
+             if (!isObject(pluginProperties)) {
+               throw new Error('Plugins must return an object of function properties');
+             } // Add the plugin function properties to this store instance.
 
-           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;
-         };
+             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.');
+               }
 
-         Tree.prototype.clear = function () {
-           this._root = null;
-           this._size = 0;
-           return this;
-         };
+               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])');
 
-         Tree.prototype.toList = function () {
-           return toList(this._root);
+             this._addStorage(storage);
+           }
          };
-         /**
-          * Bulk-load items. Both array have to be same size
-          */
+         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;
+       }
 
+       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
+       };
 
-         Tree.prototype.load = function (keys, values, presort) {
-           if (values === void 0) {
-             values = [];
-           }
+       function localStorage$1() {
+         return Global$4.localStorage;
+       }
 
-           if (presort === void 0) {
-             presort = false;
-           }
+       function read$5(key) {
+         return localStorage$1().getItem(key);
+       }
 
-           var size = keys.length;
-           var comparator = this._comparator; // sort if needed
+       function write$5(key, data) {
+         return localStorage$1().setItem(key, data);
+       }
 
-           if (presort) sort$1(keys, values, 0, size - 1, comparator);
+       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);
+         }
+       }
 
-           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 remove$5(key) {
+         return localStorage$1().removeItem(key);
+       }
 
-           return this;
-         };
+       function clearAll$5() {
+         return localStorage$1().clear();
+       }
 
-         Tree.prototype.isEmpty = function () {
-           return this._root === null;
-         };
+       // versions 6 and 7, where no localStorage, etc
+       // is available.
 
-         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
-         });
+       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;
 
-         Tree.prototype.toString = function (printNode) {
-           if (printNode === void 0) {
-             printNode = function printNode(n) {
-               return String(n.key);
-             };
-           }
+       function read$4(key) {
+         return globalStorage[key];
+       }
 
-           var out = [];
-           printRow(this._root, '', true, function (v) {
-             return out.push(v);
-           }, printNode);
-           return out.join('');
-         };
+       function write$4(key, data) {
+         globalStorage[key] = data;
+       }
 
-         Tree.prototype.update = function (key, newKey, newData) {
-           var comparator = this._comparator;
+       function each$4(fn) {
+         for (var i = globalStorage.length - 1; i >= 0; i--) {
+           var key = globalStorage.key(i);
+           fn(globalStorage[key], key);
+         }
+       }
 
-           var _a = split$2(key, this._root, comparator),
-               left = _a.left,
-               right = _a.right;
+       function remove$4(key) {
+         return globalStorage.removeItem(key);
+       }
 
-           if (comparator(key, newKey) < 0) {
-             right = insert(newKey, newData, right, comparator);
-           } else {
-             left = insert(newKey, newData, left, comparator);
-           }
+       function clearAll$4() {
+         each$4(function (key, _) {
+           delete globalStorage[key];
+         });
+       }
 
-           this._root = merge$4(left, right, comparator);
-         };
+       // versions 6 and 7, where no localStorage, sessionStorage, etc
+       // is available.
 
-         Tree.prototype.split = function (key) {
-           return split$2(key, this._root, this._comparator);
-         };
+       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 Tree;
-       }();
+       var _withStorageEl = _makeIEStorageElFunction();
 
-       function loadRecursive$1(keys, values, start, end) {
-         var size = end - start;
+       var disable = (Global$2.navigator ? Global$2.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x
 
-         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;
+       function write$3(unfixedKey, data) {
+         if (disable) {
+           return;
          }
 
-         return null;
-       }
+         var fixedKey = fixKey(unfixedKey);
 
-       function createList(keys, values) {
-         var head = new Node$1(null, null);
-         var p = head;
+         _withStorageEl(function (storageEl) {
+           storageEl.setAttribute(fixedKey, data);
+           storageEl.save(storageName);
+         });
+       }
 
-         for (var i = 0; i < keys.length; i++) {
-           p = p.next = new Node$1(keys[i], values[i]);
+       function read$3(unfixedKey) {
+         if (disable) {
+           return;
          }
 
-         p.next = null;
-         return head.next;
+         var fixedKey = fixKey(unfixedKey);
+         var res = null;
+
+         _withStorageEl(function (storageEl) {
+           res = storageEl.getAttribute(fixedKey);
+         });
+
+         return res;
        }
 
-       function toList(root) {
-         var current = root;
-         var Q = [];
-         var done = false;
-         var head = new Node$1(null, null);
-         var p = head;
+       function each$3(callback) {
+         _withStorageEl(function (storageEl) {
+           var attributes = storageEl.XMLDocument.documentElement.attributes;
 
-         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 = attributes.length - 1; i >= 0; i--) {
+             var attr = attributes[i];
+             callback(storageEl.getAttribute(attr.name), attr.name);
            }
-         }
+         });
+       }
 
-         p.next = null; // that'll work even if the tree was empty
+       function remove$3(unfixedKey) {
+         var fixedKey = fixKey(unfixedKey);
 
-         return head.next;
+         _withStorageEl(function (storageEl) {
+           storageEl.removeAttribute(fixedKey);
+           storageEl.save(storageName);
+         });
        }
 
-       function sortedListToBST(list, start, end) {
-         var size = end - start;
+       function clearAll$3() {
+         _withStorageEl(function (storageEl) {
+           var attributes = storageEl.XMLDocument.documentElement.attributes;
+           storageEl.load(storageName);
 
-         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;
-         }
+           for (var i = attributes.length - 1; i >= 0; i--) {
+             storageEl.removeAttribute(attributes[i].name);
+           }
 
-         return null;
-       }
+           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
 
-       function mergeLists(l1, l2, compare) {
-         var head = new Node$1(null, null); // dummy
 
-         var p = head;
-         var p1 = l1;
-         var p2 = l2;
+       var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");
 
-         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;
-           }
+       function fixKey(key) {
+         return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___');
+       }
 
-           p = p.next;
+       function _makeIEStorageElFunction() {
+         if (!doc$1 || !doc$1.documentElement || !doc$1.documentElement.addBehavior) {
+           return null;
          }
 
-         if (p1 !== null) {
-           p.next = p1;
-         } else if (p2 !== null) {
-           p.next = p2;
+         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 head.next;
-       }
+         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
 
-       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;
+           storageOwner.appendChild(storageEl);
+           storageEl.addBehavior('#default#userData');
+           storageEl.load(storageName);
+           storeFunction.apply(this, args);
+           storageOwner.removeChild(storageEl);
+           return;
+         };
+       }
 
-         while (true) {
-           do {
-             i++;
-           } while (compare(keys[i], pivot) < 0);
+       // doesn't work but cookies do. This implementation is adopted from
+       // https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage
 
-           do {
-             j--;
-           } while (compare(keys[j], pivot) > 0);
+       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;
 
-           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$2(key) {
+         if (!key || !_has(key)) {
+           return null;
          }
 
-         sort$1(keys, values, left, j, compare);
-         sort$1(keys, values, j + 1, right, compare);
+         var regexpStr = "(?:^|.*;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
+         return unescape(doc.cookie.replace(new RegExp(regexpStr), "$1"));
        }
 
-       function _classCallCheck$1(instance, Constructor) {
-         if (!(instance instanceof Constructor)) {
-           throw new TypeError("Cannot call a class as a function");
+       function each$2(callback) {
+         var cookies = doc.cookie.split(/; ?/g);
+
+         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);
          }
        }
 
-       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 write$2(key, data) {
+         if (!key) {
+           return;
          }
-       }
 
-       function _createClass$1(Constructor, protoProps, staticProps) {
-         if (protoProps) _defineProperties$1(Constructor.prototype, protoProps);
-         if (staticProps) _defineProperties$1(Constructor, staticProps);
-         return Constructor;
+         doc.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
        }
-       /**
-        * 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 */
 
+       function remove$2(key) {
+         if (!key || !_has(key)) {
+           return;
+         }
 
-       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
+         doc.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
+       }
 
-         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 clearAll$2() {
+         each$2(function (_, key) {
+           remove$2(key);
+         });
+       }
 
-         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 _has(key) {
+         return new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=").test(doc.cookie);
+       }
 
-         return {
-           ll: {
-             x: lowerX,
-             y: lowerY
-           },
-           ur: {
-             x: upperX,
-             y: upperY
-           }
-         };
+       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
        };
-       /* 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$2 = Number.EPSILON; // IE Polyfill
+       function sessionStorage() {
+         return Global.sessionStorage;
+       }
 
-       if (epsilon$2 === undefined) epsilon$2 = Math.pow(2, -52);
-       var EPSILON_SQ = epsilon$2 * epsilon$2;
-       /* FLP comparator */
+       function read$1(key) {
+         return sessionStorage().getItem(key);
+       }
 
-       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 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);
+         }
+       }
 
-         var ab = a - b;
+       function remove$1(key) {
+         return sessionStorage().removeItem(key);
+       }
 
-         if (ab * ab < EPSILON_SQ * a * b) {
-           return 0;
-         } // normal comparison
+       function clearAll$1() {
+         return sessionStorage().clear();
+       }
 
+       // 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.
 
-         return a < b ? -1 : 1;
+       var memoryStorage_1 = {
+         name: 'memoryStorage',
+         read: read,
+         write: write,
+         each: each,
+         remove: remove,
+         clearAll: clearAll
        };
-       /**
-        * 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 memoryStorage = {};
 
-       var PtRounder = /*#__PURE__*/function () {
-         function PtRounder() {
-           _classCallCheck$1(this, PtRounder);
+       function read(key) {
+         return memoryStorage[key];
+       }
 
-           this.reset();
-         }
+       function write(key, data) {
+         memoryStorage[key] = data;
+       }
 
-         _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)
-             };
+       function each(callback) {
+         for (var key in memoryStorage) {
+           if (memoryStorage.hasOwnProperty(key)) {
+             callback(memoryStorage[key], key);
            }
-         }]);
-
-         return PtRounder;
-       }();
-
-       var CoordRounder = /*#__PURE__*/function () {
-         function CoordRounder() {
-           _classCallCheck$1(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).
+         }
+       }
 
+       function remove(key) {
+         delete memoryStorage[key];
+       }
 
-         _createClass$1(CoordRounder, [{
-           key: "round",
-           value: function round(coord) {
-             var node = this.tree.add(coord);
-             var prevNode = this.tree.prev(node);
+       function clearAll(key) {
+         memoryStorage = {};
+       }
 
-             if (prevNode !== null && cmp(node.key, prevNode.key) === 0) {
-               this.tree.remove(coord);
-               return prevNode.key;
-             }
+       var all = [// Listed in order of usage preference
+       localStorage_1, oldFFGlobalStorage, oldIEUserDataStorage, cookieStorage, sessionStorage_1, memoryStorage_1];
 
-             var nextNode = this.tree.next(node);
+       /* 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.
 
-             if (nextNode !== null && cmp(node.key, nextNode.key) === 0) {
-               this.tree.remove(coord);
-               return nextNode.key;
-             }
+       /*jslint
+           eval, for, this
+       */
 
-             return coord;
-           }
-         }]);
+       /*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 = {};
+       }
 
-         return CoordRounder;
-       }(); // singleton available by import
+       (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;
 
-       var rounder = new PtRounder();
-       /* Cross Product of two vectors with first point at origin */
+         function f(n) {
+           // Format integers to have at least two digits.
+           return n < 10 ? "0" + n : n;
+         }
 
-       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 */
+         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;
+           };
 
-       var dotProduct$1 = function dotProduct(a, b) {
-         return a.x * b.x + a.y * b.y;
-       };
-       /* Comparator for two vectors with same starting point */
+           Boolean.prototype.toJSON = this_value;
+           Number.prototype.toJSON = this_value;
+           String.prototype.toJSON = this_value;
+         }
 
+         var gap;
+         var indent;
+         var meta;
+         var rep;
 
-       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);
-       };
+         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 length = function length(v) {
-         return Math.sqrt(dotProduct$1(v, v));
-       };
-       /* Get the sine of the angle from pShared -> pAngle to pShaed -> pBase */
+         function str(key, holder) {
+           // Produce a string from holder[key].
+           var i; // The loop counter.
 
+           var k; // The member key.
 
-       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 */
+           var v; // The member value.
 
+           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.
 
-       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 (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.
 
 
-       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. */
+           if (typeof rep === "function") {
+             value = rep.call(holder, key, value);
+           } // What happens next depends on the value's type.
 
 
-       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. */
+           switch (_typeof(value)) {
+             case "string":
+               return quote(value);
 
+             case "number":
+               // JSON numbers must be finite. Encode non-finite numbers as null.
+               return isFinite(value) ? String(value) : "null";
 
-       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
+             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 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
+             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.
 
-         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$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
+               gap += indent;
+               partial = []; // Is the value an array?
 
-             if (a.point !== b.point) a.link(b); // favor right events over left
+               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 (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
+                 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.
 
-             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)
+                 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.
 
-         }]);
 
-         function SweepEvent(point, isLeft) {
-           _classCallCheck$1(this, SweepEvent);
+               if (rep && _typeof(rep) === "object") {
+                 length = rep.length;
 
-           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
-         }
+                 for (i = 0; i < length; i += 1) {
+                   if (typeof rep[i] === "string") {
+                     k = rep[i];
+                     v = str(k, value);
 
-         _createClass$1(SweepEvent, [{
-           key: "link",
-           value: function link(other) {
-             if (other.point === this.point) {
-               throw new Error('Tried to link already linked events');
-             }
+                     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 otherEvents = other.point.events;
+                     if (v) {
+                       partial.push(quote(k) + (gap ? ": " : ":") + v);
+                     }
+                   }
+                 }
+               } // Join all of the member texts together, separated with commas,
+               // and wrap them in braces.
 
-             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();
+               v = partial.length === 0 ? "{}" : gap ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}" : "{" + partial.join(",") + "}";
+               gap = mind;
+               return v;
            }
-           /* Do a pass over our linked events and check to see if any pair
-            * of segments match, and should be consumed. */
+         } // If the JSON object does not yet have a stringify method, give it one.
 
-         }, {
-           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;
+         if (typeof JSON.stringify !== "function") {
+           meta = {
+             // table of character substitutions
+             "\b": "\\b",
+             "\t": "\\t",
+             "\n": "\\n",
+             "\f": "\\f",
+             "\r": "\\r",
+             "\"": "\\\"",
+             "\\": "\\\\"
+           };
 
-               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 = [];
+           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.
 
-             for (var i = 0, iMax = this.point.events.length; i < iMax; i++) {
-               var evt = this.point.events[i];
+             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 (evt !== this && !evt.segment.ringOut && evt.segment.isInResult()) {
-                 events.push(evt);
-               }
-             }
+             } else if (typeof space === "string") {
+               indent = space;
+             } // If there is a replacer, it must be a function or an array.
+             // Otherwise, throw an error.
 
-             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;
+             rep = replacer;
 
-             var cache = new Map();
+             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 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);
+             return str("", {
+               "": value
+             });
+           };
+         } // If the JSON object does not yet have a parse method, give it one.
 
-               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 (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];
 
-               if (asine >= 0 && bsine >= 0) {
-                 if (acosine < bcosine) return 1;
-                 if (acosine > bcosine) return -1;
-                 return 0;
-               } // both below x-axis
+               if (value && _typeof(value) === "object") {
+                 for (k in value) {
+                   if (Object.prototype.hasOwnProperty.call(value, k)) {
+                     v = walk(value, k);
 
+                     if (v !== undefined) {
+                       value[k] = v;
+                     } else {
+                       delete value[k];
+                     }
+                   }
+                 }
+               }
 
-               if (asine < 0 && bsine < 0) {
-                 if (acosine < bcosine) return -1;
-                 if (acosine > bcosine) return 1;
-                 return 0;
-               } // one above x-axis, one below
+               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.
 
 
-               if (bsine < asine) return -1;
-               if (bsine > asine) return 1;
-               return 0;
-             };
-           }
-         }]);
+             text = String(text);
+             rx_dangerous.lastIndex = 0;
 
-         return SweepEvent;
-       }(); // segments and sweep events when all else is identical
+             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.
 
 
-       var segmentId = 0;
+             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.
 
-       var Segment = /*#__PURE__*/function () {
-         _createClass$1(Segment, null, [{
-           key: "compare",
+               return typeof reviver === "function" ? walk({
+                 "": j
+               }, "") : j;
+             } // If the text is not JSON parseable, then a SyntaxError is thrown.
 
-           /* 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?
+             throw new SyntaxError("JSON.parse");
+           };
+         }
+       })();
 
-             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 json2 = json2Plugin;
 
-               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 ?
+       function json2Plugin() {
+         return {};
+       }
 
-               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?)
+       var engine = storeEngine;
+       var storages = all;
+       var plugins = [json2];
+       var store_legacy = engine.createStore(storages, plugins);
 
-               return -1;
-             } // is left endpoint of segment A the right-more?
+       var immutable = extend;
+       var hasOwnProperty = Object.prototype.hasOwnProperty;
 
+       function extend() {
+         var target = {};
 
-             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?
+         for (var i = 0; i < arguments.length; i++) {
+           var source = arguments[i];
 
-               var bCmpALeft = b.comparePoint(a.leftSE.point);
-               if (bCmpALeft !== 0) return bCmpALeft; // is the B right endpoint colinear to segment A?
+           for (var key in source) {
+             if (hasOwnProperty.call(source, key)) {
+               target[key] = source[key];
+             }
+           }
+         }
 
-               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 target;
+       }
 
-               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
+       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 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
 
-             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?
+         oauth.authenticated = function () {
+           return !!(token('oauth_token') && token('oauth_token_secret'));
+         };
 
-             if (arx < brx) {
-               var _bCmpARight = b.comparePoint(a.rightSE.point);
+         oauth.logout = function () {
+           token('oauth_token', '');
+           token('oauth_token_secret', '');
+           token('oauth_request_token_secret', '');
+           return oauth;
+         }; // TODO: detect lack of click event
 
-               if (_bCmpARight !== 0) return _bCmpARight;
-             } // is the B right endpoint more left-more?
 
+         oauth.authenticate = function (callback) {
+           if (oauth.authenticated()) return callback();
+           oauth.logout(); // ## Getting a request token
 
-             if (arx > brx) {
-               var _aCmpBRight = a.comparePoint(b.rightSE.point);
+           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 (_aCmpBRight < 0) return 1;
-               if (_aCmpBRight > 0) return -1;
+           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;
+
+             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.
 
-             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
+
+           ohauth.xhr('POST', url, params, null, {}, reqTokenDone);
+           o.loading();
+
+           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)
+             });
+
+             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 (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
+           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.
 
-             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
+           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 0;
+             ohauth.xhr('POST', url, params, null, {}, accessTokenDone);
+             o.loading();
            }
-           /* Warning: a reference to ringWindings input will be stored,
-            *  and possibly will be later modified */
 
-         }]);
+           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);
+           }
+         };
 
-         function Segment(leftSE, rightSE, rings, windings) {
-           _classCallCheck$1(this, Segment);
+         oauth.bringPopupWindowToFront = function () {
+           var brougtPopupToFront = false;
 
-           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
-         }
+           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)
+           }
 
-         _createClass$1(Segment, [{
-           key: "replaceRightSE",
+           return brougtPopupToFront;
+         };
 
-           /* 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;
+         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();
            }
-         }, {
-           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
-               }
-             };
+
+           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);
            }
-           /* 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
-             };
+           get_access_token(oauth_token);
+         }; // # xhr
+         //
+         // A single XMLHttpRequest wrapper that does authenticated calls if the
+         // user has logged in.
+
+
+         oauth.xhr = function (options, callback) {
+           if (!oauth.authenticated()) {
+             if (o.auto) {
+               return oauth.authenticate(run);
+             } else {
+               callback('not authenticated', null);
+               return;
+             }
+           } else {
+             return run();
            }
-         }, {
-           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;
+
+           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 ((!options.options || !options.options.header || options.options.header['Content-Type'] === 'application/x-www-form-urlencoded') && options.content) {
+               params = xtend(params, ohauth.stringQs(options.content));
+             }
+
+             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);
            }
-           /* 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.
+           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 (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.
 
+         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;
+         };
 
-             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.
+         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
 
-             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.
-            */
+           o.loading = o.loading || function () {};
 
-         }, {
-           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.
+           o.done = o.done || function () {};
 
-             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
+           return oauth.preauth(o);
+         }; // 'stamp' an authentication object from `getAuth()`
+         // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
+         // and timestamp
 
-             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
+         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
 
-               return null;
-             } // does this left endpoint matches (other doesn't)
 
+         var token;
 
-             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
+         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 = {};
 
+           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
 
-               return tlp;
-             } // does other left endpoint matches (this doesn't)
 
+         function getAuth(o) {
+           return {
+             oauth_consumer_key: o.oauth_consumer_key,
+             oauth_signature_method: 'HMAC-SHA1'
+           };
+         } // potentially pre-authorize
 
-             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
 
+         oauth.options(o);
+         return oauth;
+       };
 
-               return olp;
-             } // trivial intersection on right endpoints
+       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 _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 (touchesThisRSE && touchesOtherRSE) return null; // t-intersections on just one right endpoint
+       var _cachedApiStatus;
 
-             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 _changeset = {};
 
-             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
+       var _deferred = new Set();
 
-             if (pt === null) return null; // is the intersection found between the lines not on the segments?
+       var _connectionID = 1;
+       var _tileZoom = 16;
+       var _noteZoom = 12;
 
-             if (!isInBbox(bboxOverlap, pt)) return null; // round the the computed point if needed
+       var _rateLimitError;
 
-             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
-            */
+       var _userChangesets;
 
-         }, {
-           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
+       var _userDetails;
 
-             if (SweepEvent$1.comparePoints(newSeg.leftSE.point, newSeg.rightSE.point) > 0) {
-               newSeg.swapEvents();
-             }
+       var _off; // set a default but also load this from the API status
 
-             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
 
+       var _maxWayNodes = 2000;
 
-             if (alreadyLinked) {
-               newLeftSE.checkForConsuming();
-               newRightSE.checkForConsuming();
-             }
+       function authLoading() {
+         dispatch$2.call('authLoading');
+       }
 
-             return newEvents;
-           }
-           /* Swap which event is left and right */
+       function authDone() {
+         dispatch$2.call('authDone');
+       }
 
-         }, {
-           key: "swapEvents",
-           value: function swapEvents() {
-             var tmpEvt = this.rightSE;
-             this.rightSE = this.leftSE;
-             this.leftSE = tmpEvt;
-             this.leftSE.isLeft = true;
-             this.rightSE.isLeft = false;
+       function abortRequest$2(controllerOrXHR) {
+         if (controllerOrXHR) {
+           controllerOrXHR.abort();
+         }
+       }
 
-             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 hasInflightRequests(cache) {
+         return Object.keys(cache.inflight).length;
+       }
 
-         }, {
-           key: "consume",
-           value: function consume(other) {
-             var consumer = this;
-             var consumee = other;
+       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];
+         });
+       }
 
-             while (consumer.consumedBy) {
-               consumer = consumer.consumedBy;
-             }
+       function getLoc(attrs) {
+         var lon = attrs.lon && attrs.lon.value;
+         var lat = attrs.lat && attrs.lat.value;
+         return [parseFloat(lon), parseFloat(lat)];
+       }
 
-             while (consumee.consumedBy) {
-               consumee = consumee.consumedBy;
-             }
+       function getNodes(obj) {
+         var elems = obj.getElementsByTagName('nd');
+         var nodes = new Array(elems.length);
 
-             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
+         for (var i = 0, l = elems.length; i < l; i++) {
+           nodes[i] = 'n' + elems[i].attributes.ref.value;
+         }
 
-             if (cmp > 0) {
-               var tmp = consumer;
-               consumer = consumee;
-               consumee = tmp;
-             } // make sure a segment doesn't consume it's prev
+         return nodes;
+       }
 
+       function getNodesJSON(obj) {
+         var elems = obj.nodes;
+         var nodes = new Array(elems.length);
 
-             if (consumer.prev === consumee) {
-               var _tmp = consumer;
-               consumer = consumee;
-               consumee = _tmp;
-             }
+         for (var i = 0, l = elems.length; i < l; i++) {
+           nodes[i] = 'n' + elems[i];
+         }
 
-             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);
+         return nodes;
+       }
 
-               if (index === -1) {
-                 consumer.rings.push(ring);
-                 consumer.windings.push(winding);
-               } else consumer.windings[index] += winding;
-             }
+       function getTags(obj) {
+         var elems = obj.getElementsByTagName('tag');
+         var tags = {};
 
-             consumee.rings = null;
-             consumee.windings = null;
-             consumee.consumedBy = consumer; // mark sweep events consumed as to maintain ordering in sweep event queue
+         for (var i = 0, l = elems.length; i < l; i++) {
+           var attrs = elems[i].attributes;
+           tags[attrs.k.value] = attrs.v.value;
+         }
 
-             consumee.leftSE.consumedBy = consumer.leftSE;
-             consumee.rightSE.consumedBy = consumer.rightSE;
-           }
-           /* The first segment previous segment chain that is in the result */
+         return tags;
+       }
 
-         }, {
-           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
+       function getMembers(obj) {
+         var elems = obj.getElementsByTagName('member');
+         var members = new Array(elems.length);
 
-             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);
+         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
+           };
+         }
 
-               if (index === -1) {
-                 ringsAfter.push(ring);
-                 windingsAfter.push(winding);
-               } else windingsAfter[index] += winding;
-             } // calcualte polysAfter
+         return members;
+       }
 
+       function getMembersJSON(obj) {
+         var elems = obj.members;
+         var members = new Array(elems.length);
 
-             var polysAfter = [];
-             var polysExclude = [];
+         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
+           };
+         }
 
-             for (var _i = 0, _iMax = ringsAfter.length; _i < _iMax; _i++) {
-               if (windingsAfter[_i] === 0) continue; // non-zero rule
+         return members;
+       }
 
-               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);
+       function getVisible(attrs) {
+         return !attrs.visible || attrs.visible.value !== 'false';
+       }
 
-                 var _index = polysAfter.indexOf(_ring.poly);
+       function parseComments(comments) {
+         var parsedComments = []; // for each comment
 
-                 if (_index !== -1) polysAfter.splice(_index, 1);
-               }
-             } // calculate multiPolysAfter
+         for (var i = 0; i < comments.length; i++) {
+           var comment = comments[i];
 
+           if (comment.nodeName === 'comment') {
+             var childNodes = comment.childNodes;
+             var parsedComment = {};
 
-             for (var _i2 = 0, _iMax2 = polysAfter.length; _i2 < _iMax2; _i2++) {
-               var mp = polysAfter[_i2].multiPoly;
-               if (mpsAfter.indexOf(mp) === -1) mpsAfter.push(mp);
+             for (var j = 0; j < childNodes.length; j++) {
+               var node = childNodes[j];
+               var nodeName = node.nodeName;
+               if (nodeName === '#text') continue;
+               parsedComment[nodeName] = node.textContent;
+
+               if (nodeName === 'uid') {
+                 var uid = node.textContent;
+
+                 if (uid && !_userCache.user[uid]) {
+                   _userCache.toLoad[uid] = true;
+                 }
+               }
              }
 
-             return this._afterState;
+             if (parsedComment) {
+               parsedComments.push(parsedComment);
+             }
            }
-           /* 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;
+         return parsedComments;
+       }
 
-             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;
-                 }
+       function encodeNoteRtree(note) {
+         return {
+           minX: note.loc[0],
+           minY: note.loc[1],
+           maxX: note.loc[0],
+           maxY: note.loc[1],
+           data: note
+         };
+       }
 
-               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;
+       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'
+           };
+         }
+       };
 
-                   if (mpsBefore.length < mpsAfter.length) {
-                     least = mpsBefore.length;
-                     most = mpsAfter.length;
-                   } else {
-                     least = mpsAfter.length;
-                     most = mpsBefore.length;
-                   }
+       function parseJSON(payload, callback, options) {
+         options = Object.assign({
+           skipSeen: true
+         }, options);
 
-                   this._isInResult = most === operation.numMultiPolys && least < most;
-                   break;
-                 }
+         if (!payload) {
+           return callback({
+             message: 'No JSON',
+             status: -1
+           });
+         }
 
-               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;
-                 }
+         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);
 
-               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;
-                   };
+           var results = [];
+           var result;
 
-                   this._isInResult = isJustSubject(mpsBefore) !== isJustSubject(mpsAfter);
-                   break;
-                 }
+           for (var i = 0; i < children.length; i++) {
+             result = parseChild(children[i]);
+             if (result) results.push(result);
+           }
 
-               default:
-                 throw new Error("Unrecognized operation type found ".concat(operation.type));
-             }
+           callback(null, results);
+         });
 
-             return this._isInResult;
-           }
-         }], [{
-           key: "fromRing",
-           value: function fromRing(pt1, pt2, ring) {
-             var leftPt, rightPt, winding; // ordering the two points according to sweep line ordering
+         _deferred.add(handle);
 
-             var cmpPts = SweepEvent$1.comparePoints(pt1, pt2);
+         function parseChild(child) {
+           var parser = jsonparsers[child.type];
+           if (!parser) return null;
+           var uid;
+           uid = osmEntity.id.fromOSM(child.type, child.id);
 
-             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, "]"));
+           if (options.skipSeen) {
+             if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
 
-             var leftSE = new SweepEvent$1(leftPt, true);
-             var rightSE = new SweepEvent$1(rightPt, false);
-             return new Segment(leftSE, rightSE, [ring], [winding]);
+             _tileCache.seen[uid] = true;
            }
-         }]);
 
-         return Segment;
-       }();
+           return parser(child, uid);
+         }
+       }
 
-       var RingIn = /*#__PURE__*/function () {
-         function RingIn(geomRing, poly, isExterior) {
-           _classCallCheck$1(this, RingIn);
+       function parseUserJSON(payload, callback, options) {
+         options = Object.assign({
+           skipSeen: true
+         }, options);
 
-           if (!Array.isArray(geomRing) || geomRing.length === 0) {
-             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+         if (!payload) {
+           return callback({
+             message: 'No JSON',
+             status: -1
+           });
+         }
+
+         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);
+
+           var results = [];
+           var result;
+
+           for (var i = 0; i < objs.length; i++) {
+             result = parseObj(objs[i]);
+             if (result) results.push(result);
            }
 
-           this.poly = poly;
-           this.isExterior = isExterior;
-           this.segments = [];
+           callback(null, results);
+         });
 
-           if (typeof geomRing[0][0] !== 'number' || typeof geomRing[0][1] !== 'number') {
-             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+         _deferred.add(handle);
+
+         function parseObj(obj) {
+           var uid = obj.user.id && obj.user.id.toString();
+
+           if (options.skipSeen && _userCache.user[uid]) {
+             delete _userCache.toLoad[uid];
+             return null;
            }
 
-           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 user = jsonparsers.user(obj.user, uid);
+           _userCache.user[uid] = user;
+           delete _userCache.toLoad[uid];
+           return user;
+         }
+       }
 
-           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 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 coincident = false;
+           var epsilon = 0.00001;
+
+           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();
+       function parseXML(xml, callback, options) {
+         options = Object.assign({
+           skipSeen: true
+         }, options);
 
-             for (var i = 0, iMax = this.interiorRings.length; i < iMax; i++) {
-               var ringSweepEvents = this.interiorRings[i].getSweepEvents();
+         if (!xml || !xml.childNodes) {
+           return callback({
+             message: 'No XML',
+             status: -1
+           });
+         }
 
-               for (var j = 0, jMax = ringSweepEvents.length; j < jMax; j++) {
-                 sweepEvents.push(ringSweepEvents[j]);
-               }
-             }
+         var root = xml.childNodes[0];
+         var children = root.childNodes;
+         var handle = window.requestIdleCallback(function () {
+           _deferred["delete"](handle);
 
-             return sweepEvents;
+           var results = [];
+           var result;
+
+           for (var i = 0; i < children.length; i++) {
+             result = parseChild(children[i]);
+             if (result) results.push(result);
            }
-         }]);
 
-         return PolyIn;
-       }();
+           callback(null, results);
+         });
 
-       var MultiPolyIn = /*#__PURE__*/function () {
-         function MultiPolyIn(geom, isSubject) {
-           _classCallCheck$1(this, MultiPolyIn);
+         _deferred.add(handle);
 
-           if (!Array.isArray(geom)) {
-             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
-           }
+         function parseChild(child) {
+           var parser = parsers[child.nodeName];
+           if (!parser) return null;
+           var uid;
+
+           if (child.nodeName === 'user') {
+             uid = child.attributes.id.value;
+
+             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);
 
-           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.
-           }
+             if (options.skipSeen) {
+               if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
 
-           this.polys = [];
-           this.bbox = {
-             ll: {
-               x: Number.POSITIVE_INFINITY,
-               y: Number.POSITIVE_INFINITY
-             },
-             ur: {
-               x: Number.NEGATIVE_INFINITY,
-               y: Number.NEGATIVE_INFINITY
+               _tileCache.seen[uid] = true;
              }
-           };
-
-           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;
+           return parser(child, uid);
          }
+       } // replace or remove note from rtree
 
-         _createClass$1(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();
+       function updateRtree(item, replace) {
+         _noteCache.rtree.remove(item, function isEql(a, b) {
+           return a.data.id === b.data.id;
+         });
 
-               for (var j = 0, jMax = polySweepEvents.length; j < jMax; j++) {
-                 sweepEvents.push(polySweepEvents[j]);
-               }
+         if (replace) {
+           _noteCache.rtree.insert(item);
+         }
+       }
+
+       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();
              }
 
-             return sweepEvents;
+             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);
            }
-         }]);
-
-         return MultiPolyIn;
-       }();
-
-       var RingOut = /*#__PURE__*/function () {
-         _createClass$1(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 = [];
+       var serviceOsm = {
+         init: function init() {
+           utilRebind(this, dispatch$2, 'on');
+         },
+         reset: function reset() {
+           Array.from(_deferred).forEach(function (handle) {
+             window.cancelIdleCallback(handle);
 
-             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 */
+             _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;
 
-               while (true) {
-                 prevEvent = event;
-                 event = nextEvent;
-                 events.push(event);
-                 /* Is the ring complete? */
+           function done(err, payload) {
+             if (that.getConnectionId() !== cid) {
+               if (callback) callback({
+                 message: 'Connection Switched',
+                 status: -1
+               });
+               return;
+             }
 
-                 if (event.point === startingPoint) break;
+             var isAuthenticated = that.authenticated(); // 400 Bad Request, 401 Unauthorized, 403 Forbidden
+             // Logout and retry the request..
 
-                 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 (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();
+               }
 
-                   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, "]."));
+               if (callback) {
+                 if (err) {
+                   return callback(err);
+                 } else {
+                   if (path.indexOf('.json') !== -1) {
+                     return parseJSON(payload, callback, options);
+                   } else {
+                     return parseXML(payload, callback, options);
                    }
-                   /* Only one way to go, so cotinue on the path */
+                 }
+               }
+             }
+           }
 
+           if (this.authenticated()) {
+             return oauth.xhr({
+               method: 'GET',
+               path: path
+             }, done);
+           } else {
+             var url = urlroot + path;
+             var controller = new AbortController();
+             var fn;
 
-                   if (availableLEs.length === 1) {
-                     nextEvent = availableLEs[0].otherSE;
-                     break;
-                   }
-                   /* We must have an intersection. Check for a completed loop */
+             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
 
-                   var indexLE = null;
+               var match = err.message.match(/^\d{3}/);
 
-                   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 (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 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
 
+             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;
 
-                   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 (_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));
+           }
 
+           function createdChangeset(err, changesetID) {
+             _changeset.inflight = null;
 
-                   intersectionLEs.push({
-                     index: events.length,
-                     point: event.point
-                   });
-                   /* Choose the left-most option to continue the walk */
+             if (err) {
+               return callback(err, changeset);
+             }
 
-                   var comparator = event.getLeftmostComparator(prevEvent);
-                   nextEvent = availableLEs.sort(comparator)[0].otherSE;
-                   break;
+             _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));
+           }
 
-               ringsOut.push(new RingOut(events));
-             }
+           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
 
-             return ringsOut;
+             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.
+
+             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;
+               });
+             }
            }
-         }]);
+         },
+         // 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);
+             }
+           });
 
-         function RingOut(events) {
-           _classCallCheck$1(this, RingOut);
+           if (cached.length || !this.authenticated()) {
+             callback(undefined, cached);
+             if (!this.authenticated()) return; // require auth
+           }
 
-           this.events = events;
+           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));
 
-           for (var i = 0, iMax = events.length; i < iMax; i++) {
-             events[i].segment.ringOut = this;
+           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]);
            }
 
-           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];
+           oauth.xhr({
+             method: 'GET',
+             path: '/api/0.6/user/' + uid + '.json'
+           }, wrapcb(this, done, _connectionID));
 
-             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
+           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));
 
-             if (points.length === 1) return null; // check if the starting point is necessary
+           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);
+           }
 
-             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 = [];
+           this.userDetails(wrapcb(this, gotDetails, _connectionID));
 
-             for (var _i = iStart; _i != iEnd; _i += step) {
-               orderedPoints.push([points[_i].x, points[_i].y]);
+           function gotDetails(err, user) {
+             if (err) {
+               return callback(err);
              }
 
-             return orderedPoints;
+             oauth.xhr({
+               method: 'GET',
+               path: '/api/0.6/changesets?user=' + user.id
+             }, wrapcb(this, done, _connectionID));
            }
-         }, {
-           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();
+           function done(err, xml) {
+             if (err) {
+               return callback(err);
              }
 
-             return this._enclosingRing;
+             _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);
            }
-           /* 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];
+         },
+         // 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);
+           });
 
-             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;
-             }
+           function done(err, xml) {
+             if (err) {
+               // the status is null if no response could be retrieved
+               return callback(err, null);
+             } // update blocklists
 
-             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
+             var elements = xml.getElementsByTagName('blacklist');
+             var regexes = [];
 
-               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
+             for (var i = 0; i < elements.length; i++) {
+               var regexString = elements[i].getAttribute('regex'); // needs unencode?
 
-               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
+               if (regexString) {
+                 try {
+                   var regex = new RegExp(regexString);
+                   regexes.push(regex);
+                 } catch (e) {
+                   /* noop */
+                 }
+               }
+             }
 
+             if (regexes.length) {
+               _imageryBlocklists = regexes;
+             }
 
-               prevSeg = prevPrevSeg.prevInResult();
-               prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
+             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);
              }
            }
-         }]);
-
-         return RingOut;
-       }();
+         },
+         // 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);
+           }
 
-       var PolyOut = /*#__PURE__*/function () {
-         function PolyOut(exteriorRing) {
-           _classCallCheck$1(this, PolyOut);
+           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
 
-           this.exteriorRing = exteriorRing;
-           exteriorRing.poly = this;
-           this.interiorRings = [];
-         }
+           var tiles = tiler$2.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection); // abort inflight requests that are no longer needed
 
-         _createClass$1(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
+           var hadRequests = hasInflightRequests(_tileCache);
+           abortUnwantedRequests(_tileCache, tiles);
 
-             if (geom[0] === null) return null;
+           if (hadRequests && !hasInflightRequests(_tileCache)) {
+             dispatch$2.call('loaded'); // stop the spinner
+           } // issue new requests..
 
-             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);
-             }
+           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 geom;
+           if (!hasInflightRequests(_tileCache)) {
+             dispatch$2.call('loading'); // start the spinner
            }
-         }]);
-
-         return PolyOut;
-       }();
-
-       var MultiPolyOut = /*#__PURE__*/function () {
-         function MultiPolyOut(rings) {
-           _classCallCheck$1(this, MultiPolyOut);
 
-           this.rings = rings;
-           this.polys = this._composePolys(rings);
-         }
+           var path = '/api/0.6/map.json?bbox=';
+           var options = {
+             skipSeen: true
+           };
+           _tileCache.inflight[tile.id] = this.loadFromAPI(path + tile.extent.toParam(), tileCallback, options);
 
-         _createClass$1(MultiPolyOut, [{
-           key: "getGeom",
-           value: function getGeom() {
-             var geom = [];
+           function tileCallback(err, parsed) {
+             delete _tileCache.inflight[tile.id];
 
-             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 (!err) {
+               delete _tileCache.toLoad[tile.id];
+               _tileCache.loaded[tile.id] = true;
+               var bbox = tile.extent.bbox();
+               bbox.id = tile.id;
 
-               if (polyGeom === null) continue;
-               geom.push(polyGeom);
+               _tileCache.rtree.insert(bbox);
              }
 
-             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 (callback) {
+               callback(err, Object.assign({
+                 data: parsed
+               }, tile));
              }
 
-             return polys;
+             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=';
 
-         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 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
 
 
-       var SweepLine = /*#__PURE__*/function () {
-         function SweepLine(queue) {
-           var comparator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : Segment.compare;
+           var tiles = tiler$2.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection); // abort inflight requests that are no longer needed
 
-           _classCallCheck$1(this, SweepLine);
+           abortUnwantedRequests(_noteCache, tiles); // issue new requests..
 
-           this.queue = queue;
-           this.tree = new Tree(comparator);
-           this.segments = [];
-         }
+           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];
 
-         _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 (!err) {
+                 _noteCache.loaded[tile.id] = true;
+               }
 
-             if (event.consumedBy) {
-               if (event.isLeft) this.queue.remove(event.otherSE);else this.tree.remove(segment);
-               return newEvents;
-             }
+               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);
+           }
 
-             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
+           if (_noteCache.inflightPost[note.id]) {
+             return callback({
+               message: 'Note update already inflight',
+               status: -2
+             }, note);
+           }
 
-             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 (!note.loc[0] || !note.loc[1] || !note.newComment) return; // location & description required
 
+           var comment = note.newComment;
 
-             while (nextSeg === undefined) {
-               nextNode = this.tree.next(nextNode);
-               if (nextNode === null) nextSeg = null;else if (nextNode.key.consumedBy === undefined) nextSeg = nextNode.key;
-             }
+           if (note.newCategory && note.newCategory !== 'None') {
+             comment += ' #' + note.newCategory;
+           }
 
-             if (event.isLeft) {
-               // Check for intersections against the previous segment in the sweep line
-               var prevMySplitter = null;
+           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));
 
-               if (prevSeg) {
-                 var prevInter = prevSeg.getIntersection(segment);
+           function done(err, xml) {
+             delete _noteCache.inflightPost[note.id];
 
-                 if (prevInter !== null) {
-                   if (!segment.isAnEndpoint(prevInter)) prevMySplitter = prevInter;
+             if (err) {
+               return callback(err);
+             } // we get the updated note back, remove from caches and reparse..
 
-                   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
+             this.removeNote(note);
+             var options = {
+               skipSeen: false
+             };
+             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);
+           }
 
-               var nextMySplitter = null;
+           var action;
 
-               if (nextSeg) {
-                 var nextInter = nextSeg.getIntersection(segment);
+           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 (nextInter !== null) {
-                   if (!segment.isAnEndpoint(nextInter)) nextMySplitter = nextInter;
+           var path = '/api/0.6/notes/' + note.id + '/' + action;
 
-                   if (!nextSeg.isAnEndpoint(nextInter)) {
-                     var _newEventsFromSplit = this._splitSafely(nextSeg, nextInter);
+           if (note.newComment) {
+             path += '?' + utilQsString({
+               text: note.newComment
+             });
+           }
 
-                     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().
+           _noteCache.inflightPost[note.id] = oauth.xhr({
+             method: 'POST',
+             path: path
+           }, wrapcb(this, done, _connectionID));
 
+           function done(err, xml) {
+             delete _noteCache.inflightPost[note.id];
 
-               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
+             if (err) {
+               return callback(err);
+             } // we get the updated note back, remove from caches and reparse..
 
-                 this.queue.remove(segment.rightSE);
-                 newEvents.push(segment.rightSE);
 
-                 var _newEventsFromSplit2 = segment.split(mySplitter);
+             this.removeNote(note); // update closed note cache - used to populate `closed:note` changeset tag
 
-                 for (var _i2 = 0, _iMax2 = _newEventsFromSplit2.length; _i2 < _iMax2; _i2++) {
-                   newEvents.push(_newEventsFromSplit2[_i2]);
-                 }
-               }
+             if (action === 'close') {
+               _noteCache.closed[note.id] = true;
+             } else if (action === 'reopen') {
+               delete _noteCache.closed[note.id];
+             }
 
-               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);
+             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);
+           }
+         },
+         "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
 
-                     for (var _i4 = 0, _iMax4 = _newEventsFromSplit4.length; _i4 < _iMax4; _i4++) {
-                       newEvents.push(_newEventsFromSplit4[_i4]);
-                     }
-                   }
-                 }
+           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
                }
-
-               this.tree.remove(segment);
-             }
-
-             return newEvents;
+             });
+             return target;
            }
-           /* 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 (!arguments.length) {
+             return {
+               tile: cloneCache(_tileCache),
+               note: cloneCache(_noteCache),
+               user: cloneCache(_userCache)
+             };
+           } // access caches directly for testing (e.g., loading notes rtree)
 
-             if (seg.consumedBy === undefined) this.tree.insert(seg);
-             return newEvents;
-           }
-         }]);
 
-         return SweepLine;
-       }();
+           if (obj === 'get') {
+             return {
+               tile: _tileCache,
+               note: _noteCache,
+               user: _userCache
+             };
+           }
 
-       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;
+           if (obj.tile) {
+             _tileCache = obj.tile;
+             _tileCache.inflight = {};
+           }
 
-       var Operation = /*#__PURE__*/function () {
-         function Operation() {
-           _classCallCheck$1(this, Operation);
-         }
+           if (obj.note) {
+             _noteCache = obj.note;
+             _noteCache.inflight = {};
+             _noteCache.inflightPost = {};
+           }
 
-         _createClass$1(Operation, [{
-           key: "run",
-           value: function run(type, geom, moreGeoms) {
-             operation.type = type;
-             rounder.reset();
-             /* Convert inputs to MultiPoly objects */
+           if (obj.user) {
+             _userCache = obj.user;
+           }
 
-             var multipolys = [new MultiPolyIn(geom, true)];
+           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;
 
-             for (var i = 0, iMax = moreGeoms.length; i < iMax; i++) {
-               multipolys.push(new MultiPolyIn(moreGeoms[i], false));
+           function done(err, res) {
+             if (err) {
+               if (callback) callback(err);
+               return;
              }
 
-             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);
-               }
+             if (that.getConnectionId() !== cid) {
+               if (callback) callback({
+                 message: 'Connection Switched',
+                 status: -1
+               });
+               return;
              }
-             /* BBox optimization for intersection operation
-              * If we can find any pair of multipolygons whose bbox does not overlap,
-              * then the result will be empty. */
 
+             _rateLimitError = undefined;
+             dispatch$2.call('change');
+             if (callback) callback(err, res);
+             that.userChangesets(function () {}); // eagerly load user details/changesets
+           }
 
-             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];
+           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
 
-                 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 */
+           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();
+         }
+       };
 
+       var _apibase$1 = 'https://wiki.openstreetmap.org/w/api.php';
+       var _inflight$1 = {};
+       var _wikibaseCache = {};
+       var _localeIDs = {
+         en: false
+       };
 
-             var queue = new Tree(SweepEvent$1.compare);
+       var debouncedRequest$1 = debounce(request$1, 500, {
+         leading: false
+       });
 
-             for (var _i3 = 0, _iMax2 = multipolys.length; _i3 < _iMax2; _i3++) {
-               var sweepEvents = multipolys[_i3].getSweepEvents();
+       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);
+         });
+       }
 
-               for (var _j = 0, _jMax = sweepEvents.length; _j < _jMax; _j++) {
-                 queue.insert(sweepEvents[_j]);
+       var serviceOsmWikibase = {
+         init: function init() {
+           _inflight$1 = {};
+           _wikibaseCache = {};
+           _localeIDs = {};
+         },
+         reset: function reset() {
+           Object.values(_inflight$1).forEach(function (controller) {
+             controller.abort();
+           });
+           _inflight$1 = {};
+         },
 
-                 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.');
-                 }
-               }
+         /**
+          * 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;
              }
-             /* Pass the sweep line over those endpoints */
 
+             if (locale && stmt.qualifiers && stmt.qualifiers.P26 && stmt.qualifiers.P26[0].datavalue.value.id === locale) {
+               localePick = stmt;
+             }
+           });
+           var result = localePick || preferredPick;
 
-             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.');
-               }
+           if (result) {
+             var datavalue = result.mainsnak.datavalue;
+             return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
+           } else {
+             return undefined;
+           }
+         },
 
-               var newEvents = sweepLine.process(evt);
+         /**
+          * 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;
 
-               for (var _i4 = 0, _iMax3 = newEvents.length; _i4 < _iMax3; _i4++) {
-                 var _evt = newEvents[_i4];
-                 if (_evt.consumedBy === undefined) queue.insert(_evt);
+           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);
                }
+             });
+           }
 
-               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 */
+           if (rtypeSitelink) {
+             if (_wikibaseCache[rtypeSitelink]) {
+               result.rtype = _wikibaseCache[rtypeSitelink];
+             } else {
+               titles.push(rtypeSitelink);
+             }
+           }
 
-             var ringsOut = RingOut.factory(sweepLine.segments);
-             var result = new MultiPolyOut(ringsOut);
-             return result.getGeom();
+           if (keySitelink) {
+             if (_wikibaseCache[keySitelink]) {
+               result.key = _wikibaseCache[keySitelink];
+             } else {
+               titles.push(keySitelink);
+             }
            }
-         }]);
 
-         return Operation;
-       }(); // singleton available by import
+           if (tagSitelink) {
+             if (_wikibaseCache[tagSitelink]) {
+               result.tag = _wikibaseCache[tagSitelink];
+             } else {
+               titles.push(tagSitelink);
+             }
+           }
 
+           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 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];
-         }
+           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,
 
-         return operation.run('union', geom, moreGeoms);
-       };
+           };
+           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 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 (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
+                   }
+                 }
+               });
 
-         return operation.run('intersection', geom, moreGeoms);
-       };
+               if (localeSitelink) {
+                 // If locale ID is not found, store false to prevent repeated queries
+                 that.addLocale(params.langCodes[0], localeID);
+               }
 
-       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];
-         }
+               callback(null, result);
+             }
+           });
+         },
+         //
+         // 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;
+             }
 
-         return operation.run('xor', geom, moreGeoms);
-       };
+             var entity = data.rtype || data.tag || data.key;
 
-       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];
-         }
+             if (!entity) {
+               callback('No entity');
+               return;
+             }
 
-         return operation.run('difference', subjectGeom, clippingGeoms);
-       };
+             var i;
+             var description;
 
-       var index$1 = {
-         union: union$1,
-         intersection: intersection$1$1,
-         xor: xor,
-         difference: difference
-       };
+             for (i in langCodes) {
+               var _code = langCodes[i];
 
-       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 (entity.descriptions[_code] && entity.descriptions[_code].language === _code) {
+                 description = entity.descriptions[_code];
+                 break;
+               }
              }
 
-             function multi(l) {
-               return l.map(point);
-             }
+             if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
 
-             function poly(p) {
-               return p.map(multi);
-             }
+             var result = {
+               title: entity.title,
+               description: description ? description.value : '',
+               descriptionLocaleCode: description ? description.language : '',
+               editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
+             }; // add image
 
-             function multiPoly(m) {
-               return m.map(poly);
-             }
+             if (entity.claims) {
+               var imageroot;
+               var image = that.claimToValue(entity, 'P4', langCodes[0]);
 
-             function geometry(obj) {
-               if (!obj) {
-                 return {};
+               if (image) {
+                 imageroot = 'https://commons.wikimedia.org/w/index.php';
+               } else {
+                 image = that.claimToValue(entity, 'P28', langCodes[0]);
+
+                 if (image) {
+                   imageroot = 'https://wiki.openstreetmap.org/w/index.php';
+                 }
                }
 
-               switch (obj.type) {
-                 case "Point":
-                   obj.coordinates = point(obj.coordinates);
-                   return obj;
+               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 "LineString":
-                 case "MultiPoint":
-                   obj.coordinates = multi(obj.coordinates);
-                   return obj;
 
-                 case "Polygon":
-                 case "MultiLineString":
-                   obj.coordinates = poly(obj.coordinates);
-                   return obj;
+             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];
 
-                 case "MultiPolygon":
-                   obj.coordinates = multiPoly(obj.coordinates);
-                   return obj;
+             for (i in wikis) {
+               var wiki = wikis[i];
 
-                 case "GeometryCollection":
-                   obj.geometries = obj.geometries.map(geometry);
-                   return obj;
+               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);
 
-                 default:
-                   return {};
+                 if (info) {
+                   result.wiki = info;
+                   break;
+                 }
                }
-             }
 
-             function feature(obj) {
-               obj.geometry = geometry(obj.geometry);
-               return obj;
-             }
-
-             function featureCollection(f) {
-               f.features = f.features.map(feature);
-               return f;
+               if (result.wiki) break;
              }
 
-             function geometryCollection(g) {
-               g.geometries = g.geometries.map(geometry);
-               return g;
-             }
+             callback(null, result); // Helper method to get wiki info if a given language exists
 
-             if (!t) {
-               return t;
+             function getWikiInfo(wiki, langCode, tKey) {
+               if (wiki && wiki[langCode]) {
+                 return {
+                   title: wiki[langCode],
+                   text: tKey,
+                   url: 'https://wiki.openstreetmap.org/wiki/' + wiki[langCode]
+                 };
+               }
              }
+           });
+         },
+         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;
+         }
+       };
 
-             switch (t.type) {
-               case "Feature":
-                 return feature(t);
-
-               case "GeometryCollection":
-                 return geometryCollection(t);
-
-               case "FeatureCollection":
-                 return featureCollection(t);
+       var jsonpCache = {};
+       window.jsonpCache = jsonpCache;
+       function jsonpRequest(url, callback) {
+         var request = {
+           abort: function abort() {}
+         };
 
-               case "Point":
-               case "LineString":
-               case "Polygon":
-               case "MultiPoint":
-               case "MultiPolygon":
-               case "MultiLineString":
-                 return geometry(t);
+         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);
 
-               default:
-                 return t;
-             }
+             request.abort = function () {
+               window.clearTimeout(t);
+             };
            }
 
-           module.exports = parse;
-           module.exports.parse = parse;
-         })();
-       });
-
-       function isObject$4(obj) {
-         return _typeof(obj) === 'object' && obj !== null;
-       }
-
-       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);
-           });
+           return request;
          }
-       }
 
-       function getTreeDepth(obj) {
-         var depth = 0;
+         function rand() {
+           var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
+           var c = '';
+           var i = -1;
 
-         if (Array.isArray(obj) || isObject$4(obj)) {
-           forEach(obj, function (val) {
-             if (Array.isArray(val) || isObject$4(val)) {
-               var tmpDepth = getTreeDepth(val);
+           while (++i < 15) {
+             c += chars.charAt(Math.floor(Math.random() * 52));
+           }
 
-               if (tmpDepth > depth) {
-                 depth = tmpDepth;
-               }
-             }
-           });
-           return depth + 1;
+           return c;
          }
 
-         return depth;
-       }
+         function create(url) {
+           var e = url.match(/callback=(\w+)/);
+           var c = e ? e[1] : rand();
 
-       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();
-           }
+           jsonpCache[c] = function (data) {
+             if (jsonpCache[c]) {
+               callback(data);
+             }
 
-           var string = JSON.stringify(obj);
+             finalize();
+           };
 
-           if (string === undefined) {
-             return string;
+           function finalize() {
+             delete jsonpCache[c];
+             script.remove();
            }
 
-           var length = maxLength - currentIndent.length - reserved;
-           var treeDepth = getTreeDepth(obj);
+           request.abort = finalize;
+           return 'jsonpCache.' + c;
+         }
 
-           if (treeDepth <= maxNesting && string.length <= length) {
-             var prettified = prettify(string, {
-               addMargin: addMargin,
-               addArrayMargin: addArrayMargin,
-               addObjectMargin: addObjectMargin
-             });
+         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 (prettified.length <= length) {
-               return prettified;
-             }
-           }
+       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 (isObject$4(obj)) {
-             var nextIndent = currentIndent + indent;
-             var items = [];
-             var delimiters;
+       var maxHfov = 90; // zoom out degrees
 
-             var comma = function comma(array, index) {
-               return index === array.length - 1 ? 0 : 1;
-             };
+       var defaultHfov = 45;
+       var _hires = false;
+       var _resolution = 512; // higher numbers are slower - 512, 1024, 2048, 4096
 
-             if (Array.isArray(obj)) {
-               for (var index = 0; index < obj.length; index++) {
-                 items.push(_stringify(obj[index], nextIndent, comma(obj, index)) || 'null');
-               }
+       var _currScene = 0;
 
-               delimiters = '[]';
-             } else {
-               Object.keys(obj).forEach(function (key, index, array) {
-                 var keyPart = JSON.stringify(key) + ': ';
+       var _ssCache;
 
-                 var value = _stringify(obj[key], nextIndent, keyPart.length + comma(array, index));
+       var _pannellumViewer;
 
-                 if (value !== undefined) {
-                   items.push(keyPart + value);
-                 }
-               });
-               delimiters = '{}';
-             }
+       var _sceneOptions = {
+         showFullscreenCtrl: false,
+         autoLoad: true,
+         compass: true,
+         yaw: 0,
+         minHfov: minHfov,
+         maxHfov: maxHfov,
+         hfov: defaultHfov,
+         type: 'cubemap',
+         cubeMap: []
+       };
 
-             if (items.length > 0) {
-               return [delimiters[0], indent + items.join(',\n' + nextIndent), delimiters[1]].join('\n' + currentIndent);
-             }
-           }
+       var _loadViewerPromise;
+       /**
+        * abortRequest().
+        */
 
-           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).
 
+       function abortRequest$1(i) {
+         i.abort();
+       }
+       /**
+        * localeTimeStamp().
+        */
 
-       var stringOrChar = /("(?:[^\\"]|\\.)*")|[:,\][}{]/g;
 
-       function prettify(string, options) {
-         options = options || {};
-         var tokens = {
-           '{': '{',
-           '}': '}',
-           '[': '[',
-           ']': ']',
-           ',': ', ',
-           ':': ': '
+       function localeTimestamp(s) {
+         if (!s) return null;
+         var options = {
+           day: 'numeric',
+           month: 'short',
+           year: 'numeric'
          };
-
-         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];
-         });
+         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.
+        */
 
-       function get$5(options, name, defaultValue) {
-         return name in options ? options[name] : defaultValue;
-       }
 
-       var jsonStringifyPrettyCompact = stringify;
+       function loadTiles(which, url, projection, margin) {
+         var tiles = tiler$1.margin(margin).getTiles(projection); // abort inflight requests that are no longer needed
 
-       var _default$2 = /*#__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;
+         var cache = _ssCache[which];
+         Object.keys(cache.inflight).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
+             return k.indexOf(tile.id + ',') === 0;
+           });
 
-           _classCallCheck(this, _default);
+           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.
+        */
 
-           // 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 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
 
-           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`
+           bubbles.shift();
+           var features = bubbles.map(function (bubble) {
+             if (cache.points[bubble.id]) return null; // skip duplicates
 
-               var id = feature.id || props.id;
-               if (!id || !/^\S+\.geojson$/i.test(id)) return; // ensure `id` exists and is lowercase
+             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
 
-               id = id.toLowerCase();
-               feature.id = id;
-               props.id = id; // ensure `area` property exists
+             if (bubble.pr === undefined) {
+               cache.leaders.push(bubble.id);
+             }
 
-               if (!props.area) {
-                 var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²
+             return {
+               minX: loc[0],
+               minY: loc[1],
+               maxX: loc[0],
+               maxY: loc[1],
+               data: d
+             };
+           }).filter(Boolean);
+           cache.rtree.load(features);
+           connectSequences();
 
-                 props.area = Number(area.toFixed(2));
-               }
+           if (which === 'bubbles') {
+             dispatch$1.call('loadedImages');
+           }
+         });
+       } // call this sometimes to connect the bubbles into sequences
 
-               _this._cache[id] = feature;
-             });
-           } // Replace CountryCoder world geometry to be a polygon covering the world.
 
+       function connectSequences() {
+         var cache = _ssCache.bubbles;
+         var keepLeaders = [];
 
-           var world = _cloneDeep(feature$1('Q2'));
+         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.
 
-           world.geometry = {
-             type: 'Polygon',
-             coordinates: [[[-180, -90], [180, -90], [180, 90], [-180, 90], [-180, -90]]]
+           var sequence = {
+             key: bubble.key,
+             bubbles: []
            };
-           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(_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();
-
-               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);
+           var complete = false;
 
-               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
-                 };
-               }
-             }
+           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 = 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
-               }); // a .geojson filename?
-             } else if (valid.type === 'geojson') ; else if (valid.type === 'countrycoder') {
-               var _feature = _cloneDeep(feature$1(id));
+         cache.leaders = keepLeaders;
+       }
+       /**
+        * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
+        */
+
+
+       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
 
-               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 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.
 
-               if (!props.area) {
-                 var _area = geojsonArea.geometry(_feature.geometry) / 1e6; // m² to km²
 
+       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()
+        */
 
-                 props.area = Number(_area.toFixed(2));
-               } // ensure `id` property exists
 
+       function loadImage(imgInfo) {
+         return new Promise(function (resolve) {
+           var img = new Image();
 
-               _feature.id = id;
-               props.id = id;
-               this._cache[id] = _feature;
-               return Object.assign(valid, {
-                 feature: _feature
-               });
-             }
+           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 (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
-           //
+           img.onerror = function () {
+             resolve({
+               data: imgInfo,
+               status: 'error'
+             });
+           };
 
-         }, {
-           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.setAttribute('crossorigin', '');
+           img.src = imgInfo.url;
+         });
+       }
+       /**
+        * loadCanvas()
+        */
 
-             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
 
+       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()
+        */
 
-             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 loadFaces(faceGroup) {
+         return Promise.all(faceGroup.map(loadCanvas)).then(function () {
+           return {
+             status: 'loadFaces done'
+           };
+         });
+       }
 
-             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
-           //
+       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
 
-         }, {
-           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]
-               });
-             }
+         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);
+       }
 
-             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..
+       function qkToXY(qk) {
+         var x = 0;
+         var y = 0;
+         var scale = 256;
 
-             if (include.length === 1 && exclude.length === 0) {
-               return Object.assign(valid, {
-                 feature: include[0].feature
-               });
-             } // calculate unions
+         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 [x, y];
+       }
 
-             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
+       function getQuadKeys() {
+         var dim = _resolution / 256;
+         var quadKeys;
 
-             var resultGeoJSON = excludeGeoJSON ? _clip(includeGeoJSON, excludeGeoJSON, 'DIFFERENCE') : includeGeoJSON;
-             var area = geojsonArea.geometry(resultGeoJSON.geometry) / 1e6; // m² to km²
+         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'];
+         }
 
-             resultGeoJSON.id = id;
-             resultGeoJSON.properties = {
-               id: id,
-               area: Number(area.toFixed(2))
-             };
-             this._cache[id] = resultGeoJSON;
-             return Object.assign(valid, {
-               feature: resultGeoJSON
-             });
-           } // strict
-           //
+         return 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
+       var serviceStreetside = {
+         /**
+          * init() initialize streetside.
+          */
+         init: function init() {
+           if (!_ssCache) {
+             this.reset();
+           }
 
-         }, {
-           key: "cache",
-           value: function cache() {
-             return this._cache;
-           } // stringify
-           // convenience method to prettyStringify the given object
+           this.event = utilRebind(this, dispatch$1, 'on');
+         },
 
-         }, {
-           key: "stringify",
-           value: function stringify(obj, options) {
-             return jsonStringifyPrettyCompact(obj, options);
+         /**
+          * reset() reset the cache.
+          */
+         reset: function reset() {
+           if (_ssCache) {
+             Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$1);
            }
-         }]);
 
-         return _default;
-       }(); // Wrap the mfogel/polygon-clipping library and return a GeoJSON feature.
+           _ssCache = {
+             bubbles: {
+               inflight: {},
+               loaded: {},
+               nextPage: {},
+               rtree: new RBush(),
+               points: {},
+               leaders: []
+             },
+             sequences: {}
+           };
+         },
 
-       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
-           }
-         }; // is this a Polygon or a MultiPolygon?
+         /**
+          * 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 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.rtree.search(bbox).forEach(function (d) {
+             var key = d.data.sequenceKey;
 
+             if (key && !seen[key]) {
+               seen[key] = true;
+               results.push(_ssCache.sequences[key].geojson);
+             }
+           });
 
-       function _locationReducer(accumulator, location) {
-         /* eslint-disable no-console, no-invalid-this */
-         var result;
+           return results;
+         },
 
-         try {
-           var resolved = this.resolveLocation(location);
+         /**
+          * 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;
 
-           if (!resolved || !resolved.feature) {
-             console.warn("Warning:  Couldn't resolve location \"".concat(location, "\""));
-             return accumulator;
-           }
+           var sceneID = _currScene.toString();
 
-           result = !accumulator ? resolved.feature : _clip(accumulator, resolved.feature, 'UNION');
-         } catch (e) {
-           console.warn("Warning:  Error resolving location \"".concat(location, "\""));
-           console.warn(e);
-           result = accumulator;
-         }
+           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$2(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
-
-
-         function parseEventDate(when) {
-           if (!when) return;
-           var raw = when.trim();
-           if (!raw) return;
+           return _loadViewerPromise;
 
-           if (!/Z$/.test(raw)) {
-             // if no trailing 'Z', add one
-             raw += 'Z'; // this forces date to be parsed as a UTC date
-           }
+           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;
 
-           var parsed = new Date(raw);
-           return new Date(parsed.toUTCString().substr(0, 25)); // convert to local timezone
-         }
+               var yaw = _pannellumViewer.getYaw();
 
-         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 ca = selected.ca + yaw;
+               var origin = selected.loc; // construct a search trapezoid pointing out from current bubble
 
-           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 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
 
-             communities.sort(function (a, b) {
-               return a.area - b.area || b.order - a.order;
-             });
-             body.call(showCommunityLinks, communities.map(function (c) {
-               return c.resource;
-             }));
-           });
-         }
+               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
 
-         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'));
-         }
+               var minDist = Infinity;
 
-         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);
+               _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 (d.type === 'reddit') {
-             // linkify subreddits  #4997
-             descriptionHTML = descriptionHTML.replace(/(\/r\/\w*\/*)/i, function (match) {
-               return linkify(d.url, match);
-             });
-           }
+                 if (minTheta > 20) {
+                   dist += 5; // penalize distance if camera angles don't match
+                 }
 
-           selection.append('div').attr('class', 'community-description').html(descriptionHTML);
+                 if (dist < minDist) {
+                   nextID = d.data.key;
+                   minDist = dist;
+                 }
+               });
 
-           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));
+               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;
+         },
 
-           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
+         /**
+          * 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 (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);
+           if (isHidden) {
+             wrap.selectAll('.photo-wrapper:not(.ms-wrapper)').classed('hide', true);
+             wrap.selectAll('.photo-wrapper.ms-wrapper').classed('hide', false);
            }
 
-           function showMore(selection) {
-             var more = selection.selectAll('.community-more').data([0]);
-             var moreEnter = more.enter().append('div').attr('class', 'community-more');
+           return this;
+         },
 
-             if (d.extendedDescription) {
-               moreEnter.append('div').attr('class', 'community-extended-description').html(_t.html("community.".concat(d.id, ".extendedDescription"), replacements));
-             }
+         /**
+          * 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);
+         },
 
-             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
-               }));
-             }
-           }
+         /**
+          * 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
 
-           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;
+           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.i18n && d.id) {
-                 name = _t("community.".concat(communityID, ".events.").concat(d.id, ".name"), {
-                   "default": name
-                 });
-               }
+           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('|');
+           }
 
-               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]
+               };
              });
-           }
+           });
+           loadFaces(faces).then(function () {
+             if (!_pannellumViewer) {
+               that.initViewer();
+             } else {
+               // make a new scene
+               _currScene += 1;
 
-           function linkify(url, text) {
-             text = text || url;
-             return "<a target=\"_blank\" href=\"".concat(url, "\">").concat(text, "</a>");
-           }
-         }
+               var sceneID = _currScene.toString();
 
-         success.changeset = function (val) {
-           if (!arguments.length) return _changeset;
-           _changeset = val;
-           return success;
-         };
+               _pannellumViewer.addScene(sceneID, _sceneOptions).loadScene(sceneID); // remove previous scene
 
-         success.location = function (val) {
-           if (!arguments.length) return _location;
-           _location = val;
-           return success;
-         };
 
-         return utilRebind(success, dispatch$1, 'on');
-       }
+               if (_currScene > 2) {
+                 sceneID = (_currScene - 1).toString();
 
-       function modeSave(context) {
-         var mode = {
-           id: 'save'
-         };
-         var keybinding = utilKeybinding('modeSave');
-         var commit = uiCommit(context).on('cancel', cancel);
+                 _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 _conflictsUi; // uiConflicts
+           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 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 _location;
+           context.container().selectAll('.layer-streetside-images .viewfield-group .viewfield').attr('d', viewfieldPath);
 
-         var _success;
+           function viewfieldPath() {
+             var d = this.parentNode.__data__;
 
-         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 (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 cancel() {
-           context.enter(modeBrowse(context));
-         }
+           return this;
+         },
+         updateUrlImage: function updateUrlImage(imageKey) {
+           if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);
 
-         function showProgress(num, total) {
-           var modal = context.container().select('.loading-modal .modal-section');
-           var progress = modal.selectAll('.progress').data([0]); // enter/update
+             if (imageKey) {
+               hash.photo = 'streetside/' + imageKey;
+             } else {
+               delete hash.photo;
+             }
 
-           progress.enter().append('div').attr('class', 'progress').merge(progress).text(_t('save.conflict_progress', {
-             num: num,
-             total: total
-           }));
-         }
+             window.location.replace('#' + utilQsString(hash, true));
+           }
+         },
 
-         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);
+         /**
+          * cache().
+          */
+         cache: function cache() {
+           return _ssCache;
          }
+       };
 
-         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();
-         }
+       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 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 sets(params, n, o) {
+         if (params.geometry && o[params.geometry]) {
+           params[n] = o[params.geometry];
          }
 
-         function showSuccess(changeset) {
-           commit.reset();
-
-           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 valKey(d) {
+         return {
+           value: d.key,
+           title: d.key
+         };
        }
 
-       function uiToolOldDrawModes(context) {
-         var tool = {
-           id: 'old_modes',
-           label: _t.html('toolbar.add_feature')
+       function valKeyDescription(d) {
+         var obj = {
+           value: d.value,
+           title: d.description || d.value
          };
-         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();
+         if (d.count) {
+           obj.count = d.count;
          }
 
-         function osmEditable() {
-           return context.editable();
-         }
+         return obj;
+       }
+
+       function roleKey(d) {
+         return {
+           value: d.role,
+           title: d.role
+         };
+       } // sort keys with ':' lower than keys without ':'
+
 
-         modes.forEach(function (mode) {
-           context.keybinding().on(mode.key, function () {
-             if (!enabled()) return;
+       function sortKeys(a, b) {
+         return a.key.indexOf(':') === -1 && b.key.indexOf(':') !== -1 ? -1 : a.key.indexOf(':') !== -1 && b.key.indexOf(':') === -1 ? 1 : 0;
+       }
 
-             if (mode.id === context.mode().id) {
-               context.enter(modeBrowse(context));
-             } else {
-               context.enter(mode);
-             }
-           });
-         });
+       var debouncedRequest = debounce(request, 300, {
+         leading: false
+       });
 
-         tool.render = function (selection) {
-           var wrap = selection.append('div').attr('class', 'joined').style('display', 'flex');
+       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 debouncedUpdate = debounce(update, 500, {
-             leading: true,
-             trailing: true
-           });
+       function checkCache(url, params, exactMatch, callback) {
+         var rp = params.rp || 25;
+         var testQuery = params.query || '';
+         var testUrl = url;
 
-           context.map().on('move.modes', debouncedUpdate).on('drawn.modes', debouncedUpdate);
-           context.on('enter.modes', update);
-           update();
+         do {
+           var hit = _taginfoCache[testUrl]; // exact match, or shorter match yielding fewer than max results (rp)
 
-           function update() {
-             var buttons = wrap.selectAll('button.add-button').data(modes, function (d) {
-               return d.id;
-             }); // exit
+           if (hit && (url === testUrl || hit.length < rp)) {
+             callback(null, hit);
+             return true;
+           } // don't try to shorten the query
 
-             buttons.exit().remove(); // enter
 
-             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
+           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)
 
-               var currMode = context.mode().id;
-               if (/^draw/.test(currMode)) return;
+           testQuery = testQuery.slice(0, -1);
+           testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
+         } while (testQuery.length >= 0);
 
-               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
+         return false;
+       }
 
-             if (buttons.enter().size() || buttons.exit().size()) {
-               context.ui().checkOverflow('.top-toolbar', true);
-             } // update
+       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
 
+           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
 
-             buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
-               return !enabled();
-             }).classed('active', function (d) {
-               return context.mode() && context.mode().button === d.button;
+               _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;
+
+           if (key && _popularKeys[key]) {
+             callback(null, []);
+             return;
            }
-         };
 
-         return tool;
-       }
+           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?';
 
-       function uiToolNotes(context) {
-         var tool = {
-           id: 'notes',
-           label: _t.html('modes.add_note.label')
-         };
-         var mode = modeAddNote(context);
+           if (params.value) {
+             path = 'tag/wiki_pages?';
+           } else if (params.rtype) {
+             path = 'relation/wiki_pages?';
+           }
 
-         function enabled() {
-           return notesEnabled() && notesEditable();
+           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;
          }
+       };
 
-         function notesEnabled() {
-           var noteLayer = context.layers().layer('notes');
-           return noteLayer && noteLayer.enabled();
-         }
+       /**
+        * 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 notesEditable() {
-           var mode = context.mode();
-           return context.map().notesEditable() && mode && mode.id !== 'save';
+       function feature(geom, properties, options) {
+         if (options === void 0) {
+           options = {};
          }
 
-         context.keybinding().on(mode.key, function () {
-           if (!enabled()) return;
+         var feat = {
+           type: "Feature"
+         };
 
-           if (mode.id === context.mode().id) {
-             context.enter(modeBrowse(context));
-           } else {
-             context.enter(mode);
-           }
-         });
+         if (options.id === 0 || options.id) {
+           feat.id = options.id;
+         }
 
-         tool.render = function (selection) {
-           var debouncedUpdate = debounce(update, 500, {
-             leading: true,
-             trailing: true
-           });
+         if (options.bbox) {
+           feat.bbox = options.bbox;
+         }
 
-           context.map().on('move.notes', debouncedUpdate).on('drawn.notes', debouncedUpdate);
-           context.on('enter.notes', update);
-           update();
+         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
+        */
 
-           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 polygon(coordinates, properties, options) {
+         if (options === void 0) {
+           options = {};
+         }
 
-             buttons.exit().remove(); // enter
+         for (var _i = 0, coordinates_1 = coordinates; _i < coordinates_1.length; _i++) {
+           var ring = coordinates_1[_i];
 
-             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 (ring.length < 4) {
+             throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");
+           }
 
-               var currMode = context.mode().id;
-               if (/^draw/.test(currMode)) return;
+           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.");
+             }
+           }
+         }
 
-               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
+         var geom = {
+           type: "Polygon",
+           coordinates: coordinates
+         };
+         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
+        */
 
-             if (buttons.enter().size() || buttons.exit().size()) {
-               context.ui().checkOverflow('.top-toolbar', true);
-             } // update
+       function lineString(coordinates, properties, options) {
+         if (options === void 0) {
+           options = {};
+         }
 
+         if (coordinates.length < 2) {
+           throw new Error("coordinates must be an array of two or more positions");
+         }
 
-             buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
-               return !enabled();
-             }).classed('active', function (d) {
-               return context.mode() && context.mode().button === d.button;
-             });
-           }
+         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
+        */
 
-         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);
-         };
+       function multiLineString(coordinates, properties, options) {
+         if (options === void 0) {
+           options = {};
+         }
 
-         return tool;
+         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
+        *
+        */
 
-       function uiToolSave(context) {
-         var tool = {
-           id: 'save',
-           label: _t.html('save.title')
+       function multiPolygon(coordinates, properties, options) {
+         if (options === void 0) {
+           options = {};
+         }
+
+         var geom = {
+           type: "MultiPolygon",
+           coordinates: coordinates
          };
-         var button = null;
-         var tooltipBehavior = null;
-         var history = context.history();
-         var key = uiCmd('⌘S');
-         var _numChanges = 0;
+         return feature(geom, properties, options);
+       }
 
-         function isSaving() {
-           var mode = context.mode();
-           return mode && mode.id === 'save';
+       /**
+        * 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]}
+        */
+
+       function getGeom(geojson) {
+         if (geojson.type === "Feature") {
+           return geojson.geometry;
          }
 
-         function isDisabled() {
-           return _numChanges === 0 || isSaving();
-         }
+         return geojson;
+       }
 
-         function save(d3_event) {
-           d3_event.preventDefault();
+       // 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 = [];
 
-           if (!context.inIntro() && !isSaving() && history.hasChanges()) {
-             context.enter(modeSave(context));
-           }
-         }
+         for (i = 1; i < len; i++) {
+           a = points[i - 1];
+           b = points[i];
+           codeB = lastCode = bitCode(b, bbox);
 
-         function bgColor() {
-           var step;
+           while (true) {
+             if (!(codeA | codeB)) {
+               // accept
+               part.push(a);
 
-           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
-           }
-         }
+               if (codeB !== lastCode) {
+                 // segment went outside
+                 part.push(b);
 
-         function updateCount() {
-           var val = history.difference().summary().length;
-           if (val === _numChanges) return;
-           _numChanges = val;
+                 if (i < len - 1) {
+                   // start a new line
+                   result.push(part);
+                   part = [];
+                 }
+               } else if (i === len - 1) {
+                 part.push(b);
+               }
 
-           if (tooltipBehavior) {
-             tooltipBehavior.title(_t.html(_numChanges > 0 ? 'save.help' : 'save.no_changes')).keys([key]);
+               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);
+             }
            }
 
-           if (button) {
-             button.classed('disabled', isDisabled()).style('background', bgColor());
-             button.select('span.count').html(_numChanges);
-           }
+           codeA = lastCode;
          }
 
-         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);
+         if (part.length) result.push(part);
+         return result;
+       } // Sutherland-Hodgeman polygon clipping algorithm
 
-             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'))();
-             }
+       function polygonclip(points, bbox) {
+         var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
 
-             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 (edge = 1; edge <= 8; edge *= 2) {
+           result = [];
+           prev = points[points.length - 1];
+           prevInside = !(bitCode(prev, bbox) & edge);
 
-               if (isSaving()) {
-                 button.call(tooltipBehavior.hide);
-               }
-             }
-           });
-         };
+           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
 
-         tool.uninstall = function () {
-           context.keybinding().off(key, true);
-           context.history().on('change.save', null);
-           context.on('enter.save', null);
-           button = null;
-           tooltipBehavior = null;
-         };
+             if (inside !== prevInside) result.push(intersect(prev, p, edge, bbox));
+             if (inside) result.push(p); // add a point if it's inside
 
-         return tool;
-       }
+             prev = p;
+             prevInside = inside;
+           }
 
-       function uiToolSidebarToggle(context) {
-         var tool = {
-           id: 'sidebar_toggle',
-           label: _t.html('toolbar.inspect')
-         };
+           points = result;
+           if (!points.length) break;
+         }
 
-         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')));
-         };
+         return result;
+       } // intersect a segment against one of the 4 lines that make up the bbox
 
-         return tool;
-       }
+       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
 
-       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 editable() {
-           return context.mode() && context.mode().id !== 'save' && context.map().editableDataEnabled(true
-           /* ignore min zoom */
-           );
-         }
+       function bitCode(p, bbox) {
+         var code = 0;
+         if (p[0] < bbox[0]) code |= 1; // left
+         else if (p[0] > bbox[2]) code |= 2; // right
 
-         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();
+         if (p[1] < bbox[1]) code |= 4; // bottom
+         else if (p[1] > bbox[3]) code |= 8; // top
 
-             if (editable() && annotation) {
-               d.action();
-             }
+         return code;
+       }
 
-             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)();
-             }
+       /**
+        * 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]
+        */
 
-             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 bboxClip(feature, bbox) {
+         var geom = getGeom(feature);
+         var type = geom.type;
+         var properties = feature.type === "Feature" ? feature.properties : {};
+         var coords = geom.coordinates;
 
-           var debouncedUpdate = debounce(update, 500, {
-             leading: true,
-             trailing: true
-           });
+         switch (type) {
+           case "LineString":
+           case "MultiLineString":
+             {
+               var lines_1 = [];
 
-           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);
+               if (type === "LineString") {
+                 coords = [coords];
+               }
 
-           function update() {
-             buttons.classed('disabled', function (d) {
-               return !editable() || !d.annotation();
-             }).each(function () {
-               var selection = select(this);
+               coords.forEach(function (line) {
+                 lineclip(line, bbox, lines_1);
+               });
 
-               if (!selection.select('.tooltip.in').empty()) {
-                 selection.call(tooltipBehavior.updateContent);
+               if (lines_1.length === 1) {
+                 return lineString(lines_1[0], properties);
                }
-             });
-           }
-         };
 
-         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 multiLineString(lines_1, properties);
+             }
 
-         return tool;
-       }
+           case "Polygon":
+             return polygon(clipPolygon(coords, bbox), properties);
 
-       function uiTopToolbar(context) {
-         var sidebarToggle = uiToolSidebarToggle(context),
-             modes = uiToolOldDrawModes(context),
-             notes = uiToolNotes(context),
-             undoRedo = uiToolUndoRedo(context),
-             save = uiToolSave(context);
+           case "MultiPolygon":
+             return multiPolygon(coords.map(function (poly) {
+               return clipPolygon(poly, bbox);
+             }), properties);
 
-         function notesEnabled() {
-           var noteLayer = context.layers().layer('notes');
-           return noteLayer && noteLayer.enabled();
+           default:
+             throw new Error("geometry " + type + " not supported");
          }
+       }
 
-         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;
-             }
-           });
-
-           var debouncedUpdate = debounce(update, 500, {
-             leading: true,
-             trailing: true
-           });
-
-           context.layers().on('change.topToolbar', debouncedUpdate);
-           update();
+       function clipPolygon(rings, bbox) {
+         var outRings = [];
 
-           function update() {
-             var tools = [sidebarToggle, 'spacer', modes];
-             tools.push('spacer');
+         for (var _i = 0, rings_1 = rings; _i < rings_1.length; _i++) {
+           var ring = rings_1[_i];
+           var clipped = polygonclip(ring, bbox);
 
-             if (notesEnabled()) {
-               tools = tools.concat([notes, 'spacer']);
+           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 buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
+         var addressKeysToKeep = ['source'];
 
-           var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
-             var tip = _t.html(name + '.' + d + '.tooltip');
+         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
 
-             if (autoHiddenFeature(d)) {
-               var msg = showsLayer('osm') ? _t.html('map_data.autohidden') : _t.html('map_data.osmhidden');
-               tip += '<div>' + msg + '</div>';
-             }
+               for (var key in tags) {
+                 if (type === 'address' && addressKeysToKeep.indexOf(key) !== -1) continue;
 
-             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
+                 if (type === 'building') {
+                   if (buildingKeysToKeep.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
+                 }
 
-           items = items.merge(enter);
-           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', autoHiddenFeature);
-         }
+                 if (type !== 'generic') {
+                   if (key.match(/^addr:.{1,}/) || key.match(/^source:.{1,}/)) continue;
+                 }
 
-         function autoHiddenFeature(d) {
-           return context.features().autoHidden(d);
-         }
+                 delete tags[key];
+               }
 
-         function showsFeature(d) {
-           return context.features().enabled(d);
-         }
+               graph = actionChangeTags(entityID, tags)(graph);
+             }
 
-         function clickFeature(d3_event, d) {
-           context.features().toggle(d);
-         }
+             return graph;
+           }, operation.annotation());
+           context.validator().validate(); // refresh the select mode to enable the delete operation
 
-         function showsLayer(id) {
-           var layer = context.layers().layer(id);
-           return layer && layer.enabled();
-         } // add listeners
+           context.enter(modeSelect(context, selectedIDs));
+         };
 
+         operation.available = function () {
+           return _downgradeType;
+         };
 
-         context.features().on('change.map_features', section.reRender);
-         return section;
-       }
+         operation.disabled = function () {
+           if (selectedIDs.some(hasWikidataTag)) {
+             return 'has_wikidata_tag';
+           }
 
-       function uiSectionMapStyleOptions(context) {
-         var section = uiSection('fill-area', context).label(_t.html('map_data.style_options')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+           return 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 hasWikidataTag(id) {
+             var entity = context.entity(id);
+             return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+           }
+         };
 
-         function drawListItems(selection, data, type, name, change, active) {
-           var items = selection.selectAll('li').data(data); // Exit
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.downgrade.' + disable + '.' + _multi) : _t('operations.downgrade.description.' + _downgradeType);
+         };
 
-           items.exit().remove(); // Enter
+         operation.annotation = function () {
+           var suffix;
 
-           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 (_downgradeType === 'building_address') {
+             suffix = 'generic';
+           } else {
+             suffix = _downgradeType;
+           }
 
-           items = items.merge(enter);
-           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false);
-         }
+           return _t('operations.downgrade.annotation.' + suffix, {
+             n: _affectedFeatureCount
+           });
+         };
 
-         function isActiveFill(d) {
-           return context.map().activeAreaFill() === d;
-         }
+         operation.id = 'downgrade';
+         operation.keys = [uiCmd('⌫')];
+         operation.title = _t('operations.downgrade.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-         function toggleHighlightEdited(d3_event) {
-           d3_event.preventDefault();
-           context.map().toggleHighlightEdited();
-         }
+       function operationExtract(context, selectedIDs) {
+         var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';
 
-         function setFill(d3_event, d) {
-           context.map().activeAreaFill(d);
-         }
+         var _geometries = utilArrayUniq(selectedIDs.map(function (entityID) {
+           return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
+         }).filter(Boolean));
 
-         context.map().on('changeHighlighting.ui_style, changeAreaFill.ui_style', section.reRender);
-         return section;
-       }
+         var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';
 
-       function uiSectionPhotoOverlays(context) {
-         var layers = context.layers();
-         var section = uiSection('photo-overlays', context).label(_t.html('photo_overlays.title')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+         var _extent;
 
-         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 _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 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.type !== 'node') {
+             var preset = _mainPresetIndex.match(entity, graph); // only allow extraction from ways/relations if the preset supports points
 
-           function layerSupported(d) {
-             return d.layer && d.layer.supported();
+             if (preset.geometry.indexOf('point') === -1) return null;
            }
 
-           function layerEnabled(d) {
-             return layerSupported(d) && d.layer.enabled();
-           }
+           _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
+           return actionExtract(entityID, context.projection);
+         }).filter(Boolean);
 
-           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;
+         var operation = function operation() {
+           var combinedAction = function combinedAction(graph) {
+             _actions.forEach(function (action) {
+               graph = action(graph);
+             });
 
-             if (d.id === 'mapillary-signs' || d.id === 'mapillary-map-features') {
-               classes += ' indented';
-             }
+             return 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);
+           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();
 
-           function update() {
-             selection.selectAll('.privacy-third-party-icons-item').classed('active', _showThirdPartyIcons === 'true').select('input').property('checked', _showThirdPartyIcons === 'true');
-           }
-         }
+           for (var id in copies) {
+             var oldEntity = oldGraph.entity(id);
+             var newEntity = copies[id];
 
-         return section;
-       }
+             extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
 
-       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;
-       }
 
-       function uiInit(context) {
-         var _initCounter = 0;
-         var _needWidth = {};
+             var parents = context.graph().parentWays(newEntity);
+             var parentCopied = parents.some(function (parent) {
+               return originals.has(parent.id);
+             });
 
-         var _lastPointerType;
+             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
 
-         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 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
+           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
 
-             d3_event.preventDefault();
-           });
-           var detected = utilDetect(); // only WebKit supports gesture events
+           context.replace(actionMove(newIDs, delta, projection), operation.annotation());
+           context.enter(modeSelect(context, newIDs));
+         };
 
-           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.point = function (val) {
+           _pastePoint = val;
+           return operation;
+         };
 
-           if ('PointerEvent' in window) {
-             select(window).on('pointerdown.ui pointerup.ui', function (d3_event) {
-               var pointerType = d3_event.pointerType || 'mouse';
+         operation.available = function () {
+           return context.mode().id === 'browse';
+         };
 
-               if (_lastPointerType !== pointerType) {
-                 _lastPointerType = pointerType;
-                 container.attr('pointer', pointerType);
-               }
-             }, true);
-           } else {
-             _lastPointerType = 'mouse';
-             container.attr('pointer', 'mouse');
-           }
+         operation.disabled = function () {
+           return !context.copyIDs().length;
+         };
 
-           container.attr('lang', _mainLocalizer.localeCode()).attr('dir', _mainLocalizer.textDirection()); // setup fullscreen keybindings (no button shown at this time)
+         operation.tooltip = function () {
+           var oldGraph = context.copyGraph();
+           var ids = context.copyIDs();
 
-           container.call(uiFullScreen(context));
-           var map = context.map();
-           map.redrawEnable(false); // don't draw until we've set zoom/lat/long
+           if (!ids.length) {
+             return _t('operations.paste.nothing_copied');
+           }
 
-           map.on('hitMinZoom.ui', function () {
-             ui.flash.iconName('#iD-icon-no').label(_t.html('cannot_zoom'))();
+           return _t('operations.paste.description', {
+             feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph),
+             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.annotation = function () {
+           var ids = context.copyIDs();
+           return _t('operations.paste.annotation', {
+             n: ids.length
+           });
+         };
 
-           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
+         operation.id = 'paste';
+         operation.keys = [uiCmd('⌘V')];
+         operation.title = _t('operations.paste.title');
+         return operation;
+       }
 
-           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 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 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
+         function actions(situation) {
+           return selectedIDs.map(function (entityID) {
+             var entity = context.hasEntity(entityID);
+             if (!entity) 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();
+             if (situation === 'toolbar') {
+               if (entity.type === 'way' && !entity.isOneWay() && !entity.isSided()) return null;
+             }
 
-           if (apiConnections && apiConnections.length > 1) {
-             aboutList.append('li').attr('class', 'source-switch').call(uiSourceSwitch(context).keys(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);
+         }
 
-           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));
+         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';
+         }
 
-           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.
+         operation.available = function (situation) {
+           return actions(situation).length > 0;
+         };
 
+         operation.disabled = function () {
+           return false;
+         };
 
-           ui.onResize();
-           map.redrawEnable(true);
-           ui.hash = behaviorHash(context);
-           ui.hash();
+         operation.tooltip = function () {
+           return _t('operations.reverse.description.' + reverseTypeID());
+         };
 
-           if (!ui.hash.hadHash) {
-             map.centerZoom([0, 0], 2);
-           } // Bind events
+         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;
+       }
 
-           window.onbeforeunload = function () {
-             return context.save();
-           };
+       function operationSplit(context, selectedIDs) {
+         var _vertexIds = selectedIDs.filter(function (id) {
+           return context.graph().geometry(id) === 'vertex';
+         });
 
-           window.onunload = function () {
-             context.history().unlock();
-           };
+         var _selectedWayIds = selectedIDs.filter(function (id) {
+           var entity = context.graph().hasEntity(id);
+           return entity && entity.type === 'way';
+         });
 
-           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();
-             }
+         var _isAvailable = _vertexIds.length > 0 && _vertexIds.length + _selectedWayIds.length === selectedIDs.length;
 
-             var previousBackground = context.background().findSource(corePreferences('background-last-used-toggle'));
+         var _action = actionSplit(_vertexIds);
 
-             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 _ways = [];
+         var _geometry = 'feature';
+         var _waysAmount = 'single';
 
-             var mode = context.mode();
-             if (mode && /^draw/.test(mode.id)) return;
-             var layer = context.layers().layer('osm');
+         var _nodesAmount = _vertexIds.length === 1 ? 'single' : 'multiple';
 
-             if (layer) {
-               layer.enabled(!layer.enabled());
+         if (_isAvailable) {
+           if (_selectedWayIds.length) _action.limitWays(_selectedWayIds);
+           _ways = _action.ways(context.graph());
+           var geometries = {};
 
-               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);
+           _ways.forEach(function (way) {
+             geometries[way.geometry(context.graph())] = true;
            });
-           context.enter(modeBrowse(context));
-
-           if (!_initCounter++) {
-             if (!ui.hash.startWalkthrough) {
-               context.container().call(uiSplash(context)).call(uiRestore(context));
-             }
 
-             context.container().call(ui.shortcuts);
+           if (Object.keys(geometries).length === 1) {
+             _geometry = Object.keys(geometries)[0];
            }
 
-           var osm = context.connection();
-           var auth = uiLoading(context).message(_t.html('loading_auth')).blocking(true);
+           _waysAmount = _ways.length === 1 ? 'single' : 'multiple';
+         }
 
-           if (osm && auth) {
-             osm.on('authLoading.ui', function () {
-               context.container().call(auth);
-             }).on('authDone.ui', function () {
-               auth.close();
-             });
-           }
+         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
 
-           _initCounter++;
+           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 (ui.hash.startWalkthrough) {
-             ui.hash.startWalkthrough = false;
-             context.container().call(uiIntro(context));
-           }
+           context.enter(modeSelect(context, idsToSelect));
+         };
 
-           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.relatedEntityIds = function () {
+           return _selectedWayIds.length ? [] : _ways.map(function (way) {
+             return way.id;
+           });
+         };
 
-         var ui = {};
+         operation.available = function () {
+           return _isAvailable;
+         };
 
-         var _loadPromise; // renders the iD interface into the container node
+         operation.disabled = function () {
+           var reason = _action.disabled(context.graph());
 
+           if (reason) {
+             return reason;
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
+           }
 
-         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.
+           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');
+         };
 
-         ui.restart = function () {
-           context.keybinding().clear();
-           _loadPromise = null;
-           context.container().selectAll('*').remove();
-           ui.ensureLoaded();
+         operation.annotation = function () {
+           return _t('operations.split.annotation.' + _geometry, {
+             n: _ways.length
+           });
          };
 
-         ui.lastPointerType = function () {
-           return _lastPointerType;
+         operation.icon = function () {
+           if (_waysAmount === 'multiple') {
+             return '#iD-operation-split-multiple';
+           } else {
+             return '#iD-operation-split';
+           }
          };
 
-         ui.svgDefs = svgDefs(context);
-         ui.flash = uiFlash(context);
-         ui.sidebar = uiSidebar(context);
-         ui.photoviewer = uiPhotoviewer(context);
-         ui.shortcuts = uiShortcuts(context);
+         operation.id = 'split';
+         operation.keys = [_t('operations.split.key')];
+         operation.title = _t('operations.split.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-         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.
+       function operationStraighten(context, selectedIDs) {
+         var _wayIDs = selectedIDs.filter(function (id) {
+           return id.charAt(0) === 'w';
+         });
 
-           var mapDimensions = utilGetDimensions(context.container().select('.main-content'), true);
-           utilGetDimensions(context.container().select('.sidebar'), true);
+         var _nodeIDs = selectedIDs.filter(function (id) {
+           return id.charAt(0) === 'n';
+         });
 
-           if (withPan !== undefined) {
-             map.redrawEnable(false);
-             map.pan(withPan);
-             map.redrawEnable(true);
-           }
+         var _amount = (_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple';
 
-           map.dimensions(mapDimensions);
-           ui.photoviewer.onMapResize(); // check if header or footer have overflowed
+         var _nodes = utilGetAllNodes(selectedIDs, context.graph());
 
-           ui.checkOverflow('.top-toolbar');
-           ui.checkOverflow('.map-footer-bar'); // Use outdated code so it works on Explorer
+         var _coords = _nodes.map(function (n) {
+           return n.loc;
+         });
 
-           var resizeWindowEvent = document.createEvent('Event');
-           resizeWindowEvent.initEvent('resizeWindow', true, true);
-           document.dispatchEvent(resizeWindowEvent);
-         }; // Call checkOverflow when resizing or whenever the contents change.
+         var _extent = utilTotalExtent(selectedIDs, context.graph());
 
+         var _action = chooseAction();
 
-         ui.checkOverflow = function (selector, reset) {
-           if (reset) {
-             delete _needWidth[selector];
-           }
+         var _geometry;
 
-           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;
+         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 (scrollWidth > clientWidth) {
-             // overflow happening
-             selection.classed('narrow', true);
+             for (var i = 0; i < selectedIDs.length; i++) {
+               var entity = context.entity(selectedIDs[i]);
 
-             if (!_needWidth[selector]) {
-               _needWidth[selector] = scrollWidth;
-             }
-           } else if (scrollWidth >= needed) {
-             selection.classed('narrow', false);
-           }
-         };
+               if (entity.type === 'node') {
+                 continue;
+               } else if (entity.type !== 'way' || entity.isClosed()) {
+                 return null; // exit early, can't straighten these
+               }
 
-         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);
+               startNodeIDs.push(entity.first());
+               endNodeIDs.push(entity.last());
+             } // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)
 
-           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);
+             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 _editMenu = uiEditMenu(context);
+             if (utilArrayDifference(startNodeIDs, endNodeIDs).length + utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) return null; // Ensure path contains at least 3 unique nodes
 
-         ui.editMenu = function () {
-           return _editMenu;
-         };
+             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
 
-         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
+             if (_nodeIDs.length === 2 && (wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1)) return null;
 
-           if (!context.map().editableDataEnabled()) return;
-           var surfaceNode = context.surface().node();
+             if (_nodeIDs.length) {
+               // If we're only straightenting between two points, we only need that extent visible
+               _extent = utilTotalExtent(_nodeIDs, 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();
+             _geometry = 'line';
+             return actionStraightenWay(selectedIDs, context.projection);
            }
 
-           operations.forEach(function (operation) {
-             if (operation.point) operation.point(anchorPoint);
-           });
-
-           _editMenu.anchorLoc(anchorPoint).triggerType(triggerType).operations(operations); // render the menu
-
+           return null;
+         }
 
-           context.map().supersurface.call(_editMenu);
-         };
+         function operation() {
+           if (!_action) return;
+           context.perform(_action, operation.annotation());
+           window.setTimeout(function () {
+             context.validator().validate();
+           }, 300); // after any transition
+         }
 
-         ui.closeEditMenu = function () {
-           // remove any existing menu no matter how it was added
-           context.map().supersurface.select('.edit-menu').remove();
+         operation.available = function () {
+           return Boolean(_action);
          };
 
-         var _saveLoading = select(null);
-
-         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();
-
-           _saveLoading = select(null);
-         });
-         return ui;
-       }
-
-       function coreContext() {
-         var _this = this;
+         operation.disabled = function () {
+           var reason = _action.disabled(context.graph());
 
-         var dispatch$1 = dispatch('enter', 'exit', 'change');
-         var context = utilRebind({}, dispatch$1, 'on');
+           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 _deferred = new Set();
+           return false;
 
-         context.version = '2.19.6';
-         context.privacyVersion = '20200407'; // iD will alter the hash so cache the parameters intended to setup the session
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
-         context.initialHashParams = window.location.hash ? utilStringQs(window.location.hash) : {};
-         context.isFirstSession = !corePreferences('sawSplash') && !corePreferences('sawPrivacyVersion');
-         /* Changeset */
-         // An osmChangeset object. Not loaded until needed.
+             if (osm) {
+               var missing = _coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-         context.changeset = null;
-         var _defaultChangesetComment = context.initialHashParams.comment;
-         var _defaultChangesetSource = context.initialHashParams.source;
-         var _defaultChangesetHashtags = context.initialHashParams.hashtags;
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
+             }
 
-         context.defaultChangesetComment = function (val) {
-           if (!arguments.length) return _defaultChangesetComment;
-           _defaultChangesetComment = val;
-           return context;
+             return false;
+           }
          };
 
-         context.defaultChangesetSource = function (val) {
-           if (!arguments.length) return _defaultChangesetSource;
-           _defaultChangesetSource = val;
-           return context;
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.straighten.' + disable + '.' + _amount) : _t('operations.straighten.description.' + _geometry + (_wayIDs.length === 1 ? '' : 's'));
          };
 
-         context.defaultChangesetHashtags = function (val) {
-           if (!arguments.length) return _defaultChangesetHashtags;
-           _defaultChangesetHashtags = val;
-           return context;
+         operation.annotation = function () {
+           return _t('operations.straighten.annotation.' + _geometry, {
+             n: _wayIDs.length ? _wayIDs.length : _nodeIDs.length
+           });
          };
-         /* Document title */
-
-         /* (typically shown as the label for the browser window/tab) */
-         // If true, iD will update the title based on what the user is doing
 
+         operation.id = 'straighten';
+         operation.keys = [_t('operations.straighten.key')];
+         operation.title = _t('operations.straighten.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-         var _setsDocumentTitle = true;
+       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.setsDocumentTitle = function (val) {
-           if (!arguments.length) return _setsDocumentTitle;
-           _setsDocumentTitle = val;
-           return context;
-         }; // The part of the title that is always the same
+       function modeSelect(context, selectedIDs) {
+         var mode = {
+           id: 'select',
+           button: 'browse'
+         };
+         var keybinding = utilKeybinding('select');
 
+         var _breatheBehavior = behaviorBreathe();
 
-         var _documentTitleBase = document.title;
+         var _modeDragNode = modeDragNode(context);
 
-         context.documentTitleBase = function (val) {
-           if (!arguments.length) return _documentTitleBase;
-           _documentTitleBase = val;
-           return context;
-         };
-         /* User interface and keybinding */
+         var _selectBehavior;
 
+         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.
 
-         var _ui;
+         var _focusedParentWayId;
 
-         context.ui = function () {
-           return _ui;
-         };
+         var _focusedVertexIds;
 
-         context.lastPointerType = function () {
-           return _ui.lastPointerType();
-         };
+         function singular() {
+           if (selectedIDs && selectedIDs.length === 1) {
+             return context.hasEntity(selectedIDs[0]);
+           }
+         }
 
-         var _keybinding = utilKeybinding('context');
+         function selectedEntities() {
+           return selectedIDs.map(function (id) {
+             return context.hasEntity(id);
+           }).filter(Boolean);
+         }
 
-         context.keybinding = function () {
-           return _keybinding;
-         };
+         function checkSelectedIDs() {
+           var ids = [];
 
-         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`
+           if (Array.isArray(selectedIDs)) {
+             ids = selectedIDs.filter(function (id) {
+               return context.hasEntity(id);
+             });
+           }
 
-         var _connection = services.osm;
+           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;
+           }
 
-         var _history;
+           selectedIDs = ids;
+           return true;
+         } // find the parent ways for nextVertex, previousVertex, and selectParent
 
-         var _validator;
 
-         var _uploader;
+         function parentWaysIdsOfSelection(onlyCommonParents) {
+           var graph = context.graph();
+           var parents = [];
 
-         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 || entity.geometry(graph) !== 'vertex') {
+               return []; // selection includes some non-vertices
+             }
 
-         context.validator = function () {
-           return _validator;
-         };
+             var currParents = graph.parentWays(entity).map(function (w) {
+               return w.id;
+             });
 
-         context.uploader = function () {
-           return _uploader;
-         };
-         /* Connection */
+             if (!parents.length) {
+               parents = currParents;
+               continue;
+             }
 
+             parents = (onlyCommonParents ? utilArrayIntersection : utilArrayUnion)(parents, currParents);
 
-         context.preauth = function (options) {
-           if (_connection) {
-             _connection["switch"](options);
+             if (!parents.length) {
+               return [];
+             }
            }
 
-           return context;
-         };
-         /* connection options for source switcher (optional) */
-
+           return parents;
+         } // find the child nodes for selected ways
 
-         var _apiConnections;
 
-         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
+         function childNodeIdsOfSelection(onlyCommon) {
+           var graph = context.graph();
+           var childs = [];
 
+           for (var i = 0; i < selectedIDs.length; i++) {
+             var entity = context.hasEntity(selectedIDs[i]);
 
-         context.locale = function (locale) {
-           if (!arguments.length) return _mainLocalizer.localeCode();
-           _mainLocalizer.preferredLocaleCodes(locale);
-           return context;
-         };
+             if (!entity || !['area', 'line'].includes(entity.geometry(graph))) {
+               return []; // selection includes non-area/non-line
+             }
 
-         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();
-                 }
-               }
+             var currChilds = graph.childNodes(entity).map(function (node) {
+               return node.id;
+             });
 
-               if (typeof callback === 'function') {
-                 callback(err);
-               }
+             if (!childs.length) {
+               childs = currChilds;
+               continue;
+             }
 
-               return;
-             } else if (_connection && _connection.getConnectionId() !== cid) {
-               if (typeof callback === 'function') {
-                 callback({
-                   message: 'Connection Switched',
-                   status: -1
-                 });
-               }
+             childs = (onlyCommon ? utilArrayIntersection : utilArrayUnion)(childs, currChilds);
 
-               return;
-             } else {
-               _history.merge(result.data, result.extent);
+             if (!childs.length) {
+               return [];
+             }
+           }
 
-               if (typeof callback === 'function') {
-                 callback(err, result);
-               }
+           return childs;
+         }
 
-               return;
-             }
-           };
+         function checkFocusedParent() {
+           if (_focusedParentWayId) {
+             var parents = parentWaysIdsOfSelection(true);
+             if (parents.indexOf(_focusedParentWayId) === -1) _focusedParentWayId = null;
+           }
          }
 
-         context.loadTiles = function (projection, callback) {
-           var handle = window.requestIdleCallback(function () {
-             _deferred["delete"](handle);
+         function parentWayIdForVertexNavigation() {
+           var parentIds = parentWaysIdsOfSelection(true);
 
-             if (_connection && context.editableDataEnabled()) {
-               var cid = _connection.getConnectionId();
+           if (_focusedParentWayId && parentIds.indexOf(_focusedParentWayId) !== -1) {
+             // prefer the previously seen parent
+             return _focusedParentWayId;
+           }
 
-               _connection.loadTiles(projection, afterLoad(cid, callback));
-             }
-           });
+           return parentIds.length ? parentIds[0] : null;
+         }
 
-           _deferred.add(handle);
+         mode.selectedIDs = function (val) {
+           if (!arguments.length) return selectedIDs;
+           selectedIDs = val;
+           return mode;
          };
 
-         context.loadTileAtLoc = function (loc, callback) {
-           var handle = window.requestIdleCallback(function () {
-             _deferred["delete"](handle);
+         mode.zoomToSelected = function () {
+           context.map().zoomToEase(selectedEntities());
+         };
 
-             if (_connection && context.editableDataEnabled()) {
-               var cid = _connection.getConnectionId();
+         mode.newFeature = function (val) {
+           if (!arguments.length) return _newFeature;
+           _newFeature = val;
+           return mode;
+         };
 
-               _connection.loadTileAtLoc(loc, afterLoad(cid, callback));
+         mode.selectBehavior = function (val) {
+           if (!arguments.length) return _selectBehavior;
+           _selectBehavior = val;
+           return mode;
+         };
+
+         mode.follow = function (val) {
+           if (!arguments.length) return _follow;
+           _follow = val;
+           return mode;
+         };
+
+         function loadOperations() {
+           _operations.forEach(function (operation) {
+             if (operation.behavior) {
+               context.uninstall(operation.behavior);
              }
            });
 
-           _deferred.add(handle);
-         };
+           _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();
+           });
 
-         context.loadEntity = function (entityID, callback) {
-           if (_connection) {
-             var cid = _connection.getConnectionId();
+           _operations.forEach(function (operation) {
+             if (operation.behavior) {
+               context.install(operation.behavior);
+             }
+           }); // remove any displayed menu
 
-             _connection.loadEntity(entityID, afterLoad(cid, callback));
-           }
+
+           context.ui().closeEditMenu();
+         }
+
+         mode.operations = function () {
+           return _operations;
          };
 
-         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;
+         mode.enter = function () {
+           if (!checkSelectedIDs()) return;
+           context.features().forceVisible(selectedIDs);
 
-             if (zoomTo !== false) {
-               var entity = result.data.find(function (e) {
-                 return e.id === entityID;
-               });
+           _modeDragNode.restoreSelectedIDs(selectedIDs);
 
-               if (entity) {
-                 _map.zoomTo(entity);
-               }
-             }
-           });
+           loadOperations();
 
-           _map.on('drawn.zoomToEntity', function () {
-             if (!context.hasEntity(entityID)) return;
+           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];
+           }
 
-             _map.on('drawn.zoomToEntity', null);
+           _behaviors.forEach(context.install);
 
-             context.on('enter.zoomToEntity', null);
-             context.enter(modeSelect(context, [entityID]));
-           });
+           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
 
-           context.on('enter.zoomToEntity', function () {
-             if (_mode.id !== 'browse') {
-               _map.on('drawn.zoomToEntity', null);
+             selectElements();
+           }).on('undone.select', checkSelectedIDs).on('redone.select', checkSelectedIDs);
+           context.map().on('drawn.select', selectElements).on('crossEditableZoom.select', function () {
+             selectElements();
 
-               context.on('enter.zoomToEntity', null);
-             }
+             _breatheBehavior.restartIfNeeded(context.surface());
            });
-         };
+           context.map().doubleUpHandler().on('doubleUp.modeSelect', didDoubleUp);
+           selectElements();
 
-         var _minEditableZoom = 16;
+           if (_follow) {
+             var extent = geoExtent();
+             var graph = context.graph();
+             selectedIDs.forEach(function (id) {
+               var entity = context.entity(id);
 
-         context.minEditableZoom = function (val) {
-           if (!arguments.length) return _minEditableZoom;
-           _minEditableZoom = val;
+               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
 
-           if (_connection) {
-             _connection.tileZoom(val);
+             _follow = false;
            }
 
-           return context;
-         }; // String length limits in Unicode characters, not JavaScript UTF-16 code units
-
+           function nudgeSelection(delta) {
+             return function () {
+               // prevent nudging during low zoom selection
+               if (!context.map().withinEditableZoom()) return;
+               var moveOp = operationMove(context, selectedIDs);
 
-         context.maxCharsForTagKey = function () {
-           return 255;
-         };
+               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();
+               }
+             };
+           }
 
-         context.maxCharsForTagValue = function () {
-           return 255;
-         };
+           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.maxCharsForRelationRole = function () {
-           return 255;
-         };
+               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.
 
-         function cleanOsmString(val, maxChars) {
-           // be lenient with input
-           if (val === undefined || val === null) {
-             val = '';
-           } else {
-             val = val.toString();
-           } // remove whitespace
+               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';
+                 }
 
+                 return false;
 
-           val = val.trim(); // use the canonical form of the string
+                 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 (val.normalize) val = val.normalize('NFC'); // trim to the number of allowed characters
+                 function someMissing() {
+                   if (context.inIntro()) return false;
+                   var osm = context.connection();
 
-           return utilUnicodeCharsTruncated(val, maxChars);
-         }
+                   if (osm) {
+                     var missing = nodes.filter(function (n) {
+                       return !osm.isDataLoaded(n.loc);
+                     });
 
-         context.cleanTagKey = function (val) {
-           return cleanOsmString(val, context.maxCharsForTagKey());
-         };
+                     if (missing.length) {
+                       missing.forEach(function (loc) {
+                         context.loadTileAtLoc(loc);
+                       });
+                       return true;
+                     }
+                   }
 
-         context.cleanTagValue = function (val) {
-           return cleanOsmString(val, context.maxCharsForTagValue());
-         };
+                   return false;
+                 }
 
-         context.cleanRelationRole = function (val) {
-           return cleanOsmString(val, context.maxCharsForRelationRole());
-         };
-         /* History */
+                 function incompleteRelation(id) {
+                   var entity = context.entity(id);
+                   return entity.type === 'relation' && !entity.isComplete(context.graph());
+                 }
+               }
 
+               var disabled = scalingDisabled();
 
-         var _inIntro = false;
+               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();
+               }
+             };
+           }
 
-         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
+           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;
 
+             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();
+             }
+           }
 
-         context.save = function () {
-           // no history save, no message onbeforeunload
-           if (_inIntro || context.container().select('.modal').size()) return;
-           var canSave;
+           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
 
-           if (_mode && _mode.id === 'save') {
-             canSave = false; // Attempt to prevent user from creating duplicate changes - see #5200
+             checkFocusedParent();
 
-             if (services.osm && services.osm.isChangesetInflight()) {
-               _history.clearSaved();
+             if (_focusedParentWayId) {
+               surface.selectAll(utilEntitySelector([_focusedParentWayId])).classed('related', true);
+             }
 
-               return;
+             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);
              }
-           } else {
-             canSave = context.selectedIDs().every(function (id) {
-               var entity = context.hasEntity(id);
-               return entity && !entity.isDegenerate();
-             });
            }
 
-           if (canSave) {
-             _history.save();
+           function esc() {
+             if (context.container().select('.combobox').size()) return;
+             context.enter(modeBrowse(context));
            }
 
-           if (_history.hasChanges()) {
-             return _t('save.unsaved_changes');
+           function firstVertex(d3_event) {
+             d3_event.preventDefault();
+             var entity = singular();
+             var parentId = parentWayIdForVertexNavigation();
+             var way;
+
+             if (entity && entity.type === 'way') {
+               way = entity;
+             } else if (parentId) {
+               way = context.entity(parentId);
+             }
+
+             _focusedParentWayId = way && way.id;
+
+             if (way) {
+               context.enter(mode.selectedIDs([way.first()]).follow(true));
+             }
            }
-         }; // Debounce save, since it's a synchronous localStorage write,
-         // and history changes can happen frequently (e.g. when dragging).
 
+           function lastVertex(d3_event) {
+             d3_event.preventDefault();
+             var entity = singular();
+             var parentId = parentWayIdForVertexNavigation();
+             var way;
 
-         context.debouncedSave = debounce(context.save, 350);
+             if (entity && entity.type === 'way') {
+               way = entity;
+             } else if (parentId) {
+               way = context.entity(parentId);
+             }
 
-         function withDebouncedSave(fn) {
-           return function () {
-             var result = fn.apply(_history, arguments);
-             context.debouncedSave();
-             return result;
-           };
-         }
-         /* Graph */
+             _focusedParentWayId = way && way.id;
 
+             if (way) {
+               context.enter(mode.selectedIDs([way.last()]).follow(true));
+             }
+           }
 
-         context.hasEntity = function (id) {
-           return _history.graph().hasEntity(id);
-         };
+           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;
 
-         context.entity = function (id) {
-           return _history.graph().entity(id);
-         };
-         /* Modes */
+             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));
+             }
+           }
 
-         var _mode;
+           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;
 
-         context.mode = function () {
-           return _mode;
-         };
+             if (curr < length - 1) {
+               index = curr + 1;
+             } else if (way.isClosed()) {
+               index = 0;
+             }
 
-         context.enter = function (newMode) {
-           if (_mode) {
-             _mode.exit();
+             if (index !== -1) {
+               context.enter(mode.selectedIDs([way.nodes[index]]).follow(true));
+             }
+           }
+
+           function focusNextParent(d3_event) {
+             d3_event.preventDefault();
+             var parents = parentWaysIdsOfSelection(true);
+             if (!parents || parents.length < 2) return;
+             var index = parents.indexOf(_focusedParentWayId);
+
+             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);
 
-             dispatch$1.call('exit', _this, _mode);
+             if (_focusedParentWayId) {
+               surface.selectAll(utilEntitySelector([_focusedParentWayId])).classed('related', true);
+             }
            }
 
-           _mode = newMode;
+           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
 
-           _mode.enter();
+             _focusedVertexIds = currentSelectedIds;
+           }
 
-           dispatch$1.call('enter', _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));
+           }
          };
 
-         context.selectedIDs = function () {
-           return _mode && _mode.selectedIDs && _mode.selectedIDs() || [];
-         };
+         mode.exit = function () {
+           // we could enter the mode multiple times but it's only new the first time
+           _newFeature = false;
+           _focusedVertexIds = null;
 
-         context.activeID = function () {
-           return _mode && _mode.activeID && _mode.activeID();
-         };
+           _operations.forEach(function (operation) {
+             if (operation.behavior) {
+               context.uninstall(operation.behavior);
+             }
+           });
 
-         var _selectedNoteID;
+           _operations = [];
+
+           _behaviors.forEach(context.uninstall);
+
+           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 (_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,