Simulate keydown,keypress,keyup and textinput in chrome

something.coffee

# Shift still doesn't work
window.keydown = (key, {ctrl, shift, alt, meta}) ->
  dispatchKeyboardEvent = (target, eventArgs...) ->
    e = document.createEvent("KeyboardEvent")
    e.initKeyboardEvent eventArgs...
    target.dispatchEvent e

  dispatchTextEvent = (target, eventArgs...) ->
    e = document.createEvent("TextEvent")
    e.initTextEvent eventArgs...
    target.dispatchEvent e

  element = document.activeElement
  eventArgs = [true, true, null, key, 0, ctrl, alt, shift, meta] # bubbles, cancelable, view, key, location
  console.log eventArgs

  canceled = not dispatchKeyboardEvent(element, "keydown", eventArgs...)
  dispatchKeyboardEvent(element, "keypress", eventArgs...)
  if not canceled
     if dispatchTextEvent(element, "textInput", eventArgs...)
       element.value += key
  dispatchKeyboardEvent(element, "keyup", eventArgs...)