<%= javascript_include_tag "html5shiv" unless browser.html5? %>
<%= javascript_include_tag "es5" unless browser.es5? %>
<%= javascript_include_tag "es6" unless browser.es6? %>
<%= javascript_include_tag "html5shiv" unless browser.html5? %>
<%= javascript_include_tag "es5" unless browser.es5? %>
<%= javascript_include_tag "es6" unless browser.es6? %>