code: function triggerTouch(type) {
          var event = document.createEvent('Event');
          var touchlist = this._createTouchList(this.touches);
  
          event.initEvent('touch' + type, true, true);
          event.touches = touchlist;
          event.changedTouches = touchlist;
  
          return this.element.dispatchEvent(event);
      }
docs: trigger touch event
  @param type
  @returns {Boolean}