title: How to extract a title of nodes in Network graph in Vis.js
body: <p>I see this example at <a href="http://visjs.org/examples/network/events/interactionEvents.html" rel="nofollow noreferrer">http://visjs.org/examples/network/events/interactionEvents.html</a>.</p>
  
  <p>I want to set up a onclick handler and I want to extract the title of the node (not limited to the ID such as 1, 2 and so on). I couldn't find a good example and I am wondering if anyone knows how?</p>
  
  <p>Cheers,
  K</p>