title: AngularJS constantly watch on text input
body: <p>I am wondering if it is posible to constantly watching the text input, like typing a string and then run a function.</p>
  
  <p>I would use it for html game, that if you like type the word pause on a random moment you pause the game.</p>
  
  <p>Is this possible to make? or are there any easy sample scripts? That would help me alot!
  Thanks!</p>