title: es6 import var not defined in code importing
body: <p>For some reason when I do var sphere = new Core(); in Game, I see Core is undefined, even though I import it:</p>
  
  <p>Game.js</p>
  
  <pre><code>  import Core from 'gameUnits/Core' 
  
      export class Game { 
      constructor() {
  </code></pre>
  
  <p>Core.js:</p>
  
  <pre><code>export class Core {
      constructor(scene) {
      }
  }
  </code></pre>