Keyup Function with Delay

jquery_with_delay_function.js

// in Javascript file
var realtimeSearchWithDelay = (function(){
  var timer = 0;
  return function(callback, ms){
    clearTimeout (timer);
    timer = setTimeout(callback, ms);
  };
})();


$('input.realtime-search').keyup(function() {
    realtimeSearchWithDelay(function(){
      alert('Time elapsed!');
    }, 1000 );
});


// in Coffee file
window.realtimeSearchWithDelay = do ->
  timer = 0
  (callback, ms) ->
    clearTimeout timer
    timer = setTimeout(callback, ms)
    return

  return
 
 $(document).on 'keyup', 'input.realtime-search', (e) ->
   e.preventDefault()
   e.stopPropagation()
   realtimeSearchWithDelay (->
     alert('Time elapsed!');
   ), delayTime