title: Javascript ES6 - Enums inside classes used outside like a static enum
body: <p>I'd like to ask if it's possible to add an enum similar to:</p>
  
  <pre><code>STATES = {
      WIP: "Work in progress",
      ONLINE: "Online",
      ONLINE_MODIFIED: "Online, modified",
      HIDDEN: "Hidden"
  }
  </code></pre>
  
  <p>inside a Class, and be able to use it in some other file with something similar to: <code>object.updateState(Class.STATES.HIDDEN)</code> without having to construct a new object like <code>boxObject.updateState(new Box().STATES.HIDDEN)</code></p>
  
  <p>Thank you.</p>