App.Lib.GlobalEvents =
  ###
  This will trigger the callback whenever the user clicks on something outside
  the given element. If the user clicks on something insied `el`, it will not
  trigger the callback.
  You can give it many elements using jQuery's `#add`:
      $els = $('.my-element').add($('.some-other-element'))
      App.Lib.GlobalEvents.onClickedOutside $els, =>
        # do something
  ###
  onClickedOutside: (el, callback) ->
    $el = $(el)

    # This get's executed when leaving the page using Turbolinks. In that case,
    # the whole body get's erased, together with our bindings, but in this case,
    # `document` stays the same so we have to manually clear the bindings.
    $(document).on 'turbolinks:before-cache', ->
      $(document).unbind '.app-global-event'

    $(document).on 'mouseup.app-global-event', (e) =>
      return if $el.is(e.target) or $el.has(e.target).length isnt 0
      callback()