A debounce timeout trigger for typing in an input. The example is in jQuery, but this works with any event/listener.

keyup-debouce-timeout.js

$('#input').on('keyup', function() {
  // do an ajax save when this input is changed
  var val = this.value;
  // clear the timeout so we dont fire in succession
  clearTimeout(this.delayer);
  this.delayer = setTimeout(function () {
    console.log(val);
  }, 500);
});