[Front-End] mouseDown手機上運行

前言

手機上無法使用mouseDown等等的事件，必須使用touchStart，網路上找到別人寫的替換方法。

程式碼

var mouseEventTypes = {
	touchstart : "mousedown",
	touchmove : "mousemove",
	touchend : "mouseup"
};

for (originalType in mouseEventTypes) {
	document.addEventListener(originalType, function(originalEvent) {
		event = document.createEvent("MouseEvents");
		touch = originalEvent.changedTouches[0];
		event.initMouseEvent(mouseEventTypes[originalEvent.type], true, true,
		window, 0, touch.screenX, touch.screenY, touch.clientX,
		touch.clientY, touch.ctrlKey, touch.altKey, touch.shiftKey,
		touch.metaKey, 0, null);
		originalEvent.target.dispatchEvent(event);
	});
}