使用原生JS封装Tap事件，解决移动端300ms延迟

if (!HTMLElement.prototype.addTapEvent) {
    HTMLElement.prototype.addTapEvent = function(callback) {        var tapStartTime = 0,
            tapEndTime = 0,
            tapTime = 500, //tap等待时间，在此事件下松开可触发方法
            tapStartClientX = 0,
            tapStartClientY = 0,
            tapEndClientX = 0,
            tapEndClientY = 0,
            tapScollHeight = 15, //水平或垂直方向移动超过15px测判定为取消（根据chrome浏览器默认的判断取消点击的移动量)
            cancleClick = false;        this.addEventListener('touchstart', function() {
            tapStartTime = event.timeStamp;            var touch = event.changedTouches[0];
            tapStartClientX = touch.clientX;
            tapStartClientY = touch.clientY;
            cancleClick = false;
        })        this.addEventListener('touchmove', function() {            var touch = event.changedTouches[0];
            tapEndClientX = touch.clientX;
            tapEndClientY = touch.clientY;            if ((Math.abs(tapEndClientX - tapStartClientX) > tapScollHeight) || (Math.abs(tapEndClientY - tapStartClientY) > tapScollHeight)) {
                cancleClick = true;
            }
        })        this.addEventListener('touchend', function() {
            tapEndTime = event.timeStamp;            if (!cancleClick && (tapEndTime - tapStartTime) <= tapTime) {
                callback();
            }
        })
    }
}

HTMLElement.addTapEvent(function(){    //do something...})
如：document.querySelect('#test').addTapEvent(function(){
    alert('this is a tap event');
})