title: Play Framework Parse error. Unsupported syntax: CONST
body: <p>On a Play Framework 2 project if I have any javascript code with this simple statements like that:</p>
  
  <pre><code>const num = 3;
  </code></pre>
  
  <p>I get the error:<br/>
  Parse error. Unsupported syntax: CONST</p>
  
  <p>I see that Play Framework has a Javascript Compiler and, from I what I get, minifies your javascript automatically but are consts really not supported ?? It is fundamental language syntax...</p>