title: RactiveJS - How can I remove event handler from a specific element (node)
body: <p>For example, I have registered a proxy event on an element</p>
  
  <pre><code>&lt;a href="javascript:;" on-mouseover="doSomething"&gt;Do something&lt;/a&gt;
  </code></pre>
  
  <p>Say I have a reference to this element (e.g. from event.node inside the event handler), how can I remove/unsubscribe "doSomething" from just this specific element? (I still want to keep this event for other elements)</p>