t/New_in_JavaScript/ECMAScript_6_support_in_Mozilla">ECMAScript 6 or ES6</a>.
While the Guides <a href="/#toc_assumptions">assume you have a working knowledge of JavaScript</a>,
not every feature of the JavaScript language may be familiar to the developer.</p>
<p>In this guide we will be covering some JavaScript features,
and how they are used in Ember applications.</p>
<h2 id="toc_variable-declarations">Variable declarations <a href="#toc_variable-declarations"><svg xmlns="http://www.w3.org/2000/svg" viewB