title: What is trigger "liszt:updated" in jQuery?
body: <p>I was following the answer here:
  <a href="https://stackoverflow.com/questions/9876340/jquerys-chosen-plugin-with-chained-plugin-and-select-box">Jquery&#39;s Chosen plugin with Chained plugin and select box</a></p>
  
  <p>And I found a line that I just don't follow - as I don't understand what 'liszt:updated' means - I can't find many references to this online to explain. </p>
  
  <p><strong>Specifically in the code:</strong></p>
  
  <pre><code> $("#budget").trigger("liszt:updated");
  </code></pre>
  
  <p>What does 'liszt:updated' in jQuery mean?</p>