title: Backbone Start twice
body: <p>I started a simple Backbone app, but my start function run twice. What did I wrong?</p>
  
  <pre><code> var ActivityApp = new (Backbone.View.extend({
      Models: {},
      Views: {},
      Collections: {},
      start: function() {
        console.log('ad');
      }   }))({el: document.body});
  
  $(function(){ ActivityApp.start(); })
  </code></pre>