title: jQuery doesn't support postmessage event?
body: <p>When I use jQuery event listener to handle message event, like below:</p>
  
  <pre><code>$(window).on('message', function(e) {
      var data = e.data; // data = undefined
  });
  </code></pre>
  
  <p>data is undefined! I'm sure that I have passed data to current window. Because if I use "addEventListener", everything goes well!</p>
  
  <p>So, what's the problem?</p>