title: do I need to remove listener for .click / .change / etc?
body: <p>When you create event listener .on('click', functionA), it is good to remove the event listener when you don't need it any more with .off('click', functionA);</p>
  
  <p>But does this apply to .click, .change etc as well? do we need to turn these OFF ?</p>
  
  <p>I'm working on a UI that is a single DOM, with hundreds of JS pages, so I wonder if these click events are out there being unnecessary listeners and affecting performance.</p>