title: Callback with Classie.js
body: <p>I'm using <a href="https://gist.github.com/desandro/4624426" rel="nofollow">Classie.JS</a> to create a s<a href="http://tympanus.net/Blueprints/SlidePushMenus/" rel="nofollow">lideover menu demonstrated on Codrops</a>. </p>
  
  <p>Part of the code I'm using is below. I'd like to implement a callback, so that the last 2 lines of this function only occur once the toggle has completed (it's animated). Thanks!</p>
  
  <pre><code>showLeftOpen.onclick = function() {
      classie.toggle( this, 'active' );
      classie.toggle( menuLeft, 'cbp-spmenu-open' );
      disableOther( 'showLeft' );
      $('#showLeftOpen').hide();
      $('#showLeftClose').show();
  };
  </code></pre>