Double tap jQuery plugin

doubletap.js

var DoubleTap =
{
        touchStart: function(event)
        {
                this.touched = true;
        },

        touchEnd: function(event)
        {
                if(!this.touched)
                {
                        return;
                }

                var now = Date.now();
                var element = $(event.target);
                var delay = element.data('DoubleTapDelay');
                var dblTapTimeout = element.data('dblTapTimeout');
                var lastTouch = element.data('lastTouch');

                if(lastTouch)
                {
                        //var delta = now - lastTouch;
                        element.removeData('lastTouch');

                        // Clear timeout
                        clearTimeout(dblTapTimeout);
                        var onDoubleTapCallback = element.data('onDoubleTapCallback');

                        if(onDoubleTapCallback)
                        {
                                onDoubleTapCallback.bind(element[0])(event);
                        }
                }
                else
                {
                        element.data('lastTouch', now);

                        // TODO: Need visual confirmation of a click...
                        // highlight?

                        var timeout_handle = setTimeout(
                                function()
                                {
                                        element.removeData('lastTouch');

                                        var onSingleTapCallback = $(event.target).data('onSingleTapCallback');
                                        if(onSingleTapCallback)
                                        {
                                                onSingleTapCallback.bind(element[0])(event);
                                        }
                                },
                                delay
                        );

                        element.data('dblTapTimeout', timeout_handle);
                }

                // Remove ontouchend event (will be re-added ontouchstart if a double tap occurs)
                this.touched = false;
        },

        touchCancel: function(event)
        {
                $(event.target).removeData('dblTapTimeout');
                $(event.target).removeData('lastTouch');
                this.touched = false;
        },

        touchMove: function(event)
        {
                $(event.target).removeData('dblTapTimeout');
                $(event.target).removeData('lastTouch');
                this.touched = false;
        },
};

jQuery.fn.doubletap = function(onDoubleTapCallback, onSingleTapCallback, delay)
{
        delay = (delay === undefined? 300 : delay);

        $(this).data('DoubleTapDelay', delay);
        $(this).data('onDoubleTapCallback', onDoubleTapCallback);
        $(this).data('onSingleTapCallback', onSingleTapCallback);
        $(this).on('touchstart', DoubleTap.touchStart);
        $(this).on('touchend', DoubleTap.touchEnd);
        $(this).on('touchcancel', DoubleTap.touchCancel);
        $(this).on('touchmove', DoubleTap.touchMove);
};