title: How do we handle webgl context lost event in Three.js
body: <p>I want to handle a lost context event in Three.js. There is a nice documentation about that <a href="http://www.khronos.org/webgl/wiki/HandlingContextLost" rel="nofollow noreferrer">here</a> but unfortunately it doesn't work when I apply it to my <code>renderer.domElement</code>. I try to lose the context by clicking and some variable in <code>loseContext()</code> are undefined.</p>
  
  <p>I guess the structure is different in Three.js. Any expert?</p>