title: How to add swipe event on elements in angular4?
body: <p>i'm trying to add a swipe event to elements on a page to trigger a class change but nothing i've tried so far works.
  I'm working with Angular 4 . 
  Any idea of a library i could use ?
  I've heard about Hammerjs but i don't know if that could do the job.</p>
  
  <p>Thanks.</p>