title: This appears to be a class on a Javascript event. What is it?
body: <p>I just ran across some jQuery that looks like this:</p>
  
  <pre><code>$('.add-row').live('click.add', function() { 
      // do something
  }
  </code></pre>
  
  <p>This appears to be binding to the <strong>'click.add'</strong> event. I use custom events myself and think they're awesome, but doing <code>git grep</code> on our code base doesn't reveal any place where a custom event called <code>click.add</code> is triggered, and in any case, this behavior is triggered by a normal click. Nor do I see an <code>.add</code> class anywhere in the HTML.</p>
  
  <p>I don't think you can have classes on Javascript events. Any idea what this odd bit of syntax is?</p>