/*
Following function has the scroll event attached, which then triggers the custom event defined on line 5.

Line 5 seems to be causing the function to invoke twice (if removed line 4 is printed once, with line 5 its twice).

Custom event should only fire once, at the moment its twice.
*/

this.on(window, 'scroll', function (event) {
  setTimeout(xxx, function() {
    var win = $(window);
    if ($(document).height() - win.height() === win.scrollTop()) {
      console.log('testing 123');
      this.trigger('uiHandlRequest', { type: 'foo' });
      return false;
    }
  });
});