使用jQuery以毫秒为单位记录持续时间?

这不需要jQuery。要以毫秒为单位获取用户计算机上的时间:

var nowInMilliseconds = new Date().getTime();

所以要比较两次,只需从结束时间中减去开始时间,这就是毫秒的区别。

例子:

(function() {
    var firstClick;

    function clickHandler() {
        var now, duration;

        now = new Date().getTime();
        if (!firstClick) {
            // Remember the time of the first click
            firstclick = now;
        }
        else {
            // Second click; how long as it been?
            duration = now - firstClick;

            // Reset so we're waiting for the first click again
            firstClick = undefined;

            // ...send your Ajax data to the server...
        }
    }

    function pageLoad() {
        $('#button').click(clickHandler);
    }

    window.onload = pageLoad; // or jQuery.ready() or whatever
})();