pan class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
<span aria-hidden="true" class="line-numbers-rows"><a href="#C9_L1" id=C9_L1></a><a href="#C9_L2" id=C9_L2></a><a href="#C9_L3" id=C9_L3></a><a href="#C9_L4" id=C9_L4></a><a href="#C9_L5" id=C9_L5></a></span></code></pre>
<p>By default, the action handler receives the first parameter of the event
listener, the event object the browser passes to the handler, so
<code>bandDidChange</code>