ECMAScript 6 support in PhpStorm 2016
<p>I recently pulled in the latest Laravel 5.3. In the <code>gulp.js</code> file, there is the newer ES6 arrow function syntax:</p>

<pre><code>elixir(mix =&gt; {
    mix.sass('app.scss')
       .webpack('app.js');
});
</code></pre>

<p>PhpStorm 2016.2 shows this code error on that:</p>

<pre><code>Expression statement is not assignment or call.
</code></pre>

<p>Additionally, the code auto-formatter mucks everything up when it encounters this because it sees it as an error.</p>

<p>How do I get PhpStorm to stop showing that as an error?</p>