title: How to get realtime data?
body: <p>I am trying to build a bus application which shall behave exactly like this (<a href="http://pdxlivebus.com/" rel="nofollow noreferrer">http://pdxlivebus.com/</a>) one.</p>
  
  <p>Now I simply can not get the idea out that how can i constantly feed data to the UI from my backend? I don't want to send ajax requests after some intervals. I have done chat application with react and node.js but they are realtime in a sense that one user does something(send message or disconnect) and for that the server sends out a socket event and the client listens and updates.</p>
  
  <p>But application like this one <a href="http://pdxlivebus.com/" rel="nofollow noreferrer">http://pdxlivebus.com/</a> where the user does not do anything but to watch the buses how does the UI gets updated with the latest data?</p>