title: How does WebStorm syntax inspection can recognize ES6 syntax "..."?
body: <p>I used ES6 syntax <code>...</code> in my code for unpack an array, example:</p>
  
  <pre><code>var fn = function(arg0, arg1, arg2) {
      // use arguments here.
  };
  fn(...[1, 2, 3]);
  </code></pre>
  
  <p>but my WebStorm can't distinguish this syntax. How to set up WebStorm to fix this problem?</p>
  
  <p>WebStorm version: 11.0.3.</p>