Programmatically trigger touch event

dispatch-touch-event.coffee

# http://codepen.io/morewry/pen/pvLxPV

# manually create touch event
touchStartOn = (el, x = 0, y = 0) ->
  try
    e = document.createEvent('TouchEvent')
    e.initTouchEvent("touchstart", true, true)
  catch err
    try
    	e = document.createEvent('UIEvent')
    	e.initUIEvent("touchstart", true, true)
    catch err
      e = document.createEvent('Event')
      e.initEvent("touchstart", true, true)
  e.targetTouches = [
    pageX: x
    pageY: y
  ]
  el.dispatchEvent(e)
  
touchEndOn = (el, x = 0, y = 0) ->
  try
    e = document.createEvent('TouchEvent')
    e.initTouchEvent("touchend", true, true)
  catch err
    try
    	e = document.createEvent('UIEvent')
    	e.initUIEvent("touchend", true, true)
    catch err
      e = document.createEvent('Event')
      e.initEvent("touchend", true, true)
  e.changedTouches = [
    pageX: x
    pageY: y
  ]
  el.dispatchEvent(e)

# artificially trigger on a button
button = document.getElementById("button")

button.addEventListener "touchstart", (e) -> console.log e, "touchstart"
button.addEventListener "touchend", (e) ->> console.log e, "touchend"
  
touchStartOn(button, 5, 5)
touchEndOn(button, 10, 10)

button.addEventListener "touchend", (e) ->> console.log e, "touchend"

changed:
button.addEventListener "touchend", (e) -> console.log e, "touchend"