title: WOW is not a constructor
body: <p>when I try to require <code>WOW</code> by one of those statements</p>
  
  <pre><code>global.WOW = require('wowjs');
  var WOW = require('wowjs');
  window.WOW = require('wowjs');
  </code></pre>
  
  <p>I receive this error</p>
  
  <blockquote>
    <p>jQuery.Deferred exception: WOW is not a constructor TypeError: WOW is not a constructor</p>
  </blockquote>