如何使用MomentJS从特定时间开始计数

Question

I'm using momentJS for real time (counting time) clock on my project. And is working perfectly. Here is my code:

interval = setInterval(function() {
    momentNow = moment();
    moment_time = momentNow.format('hh:mm:ss A');
    moment_date = momentNow.format('MMMM DD, YYYY') + ' ' 
        + momentNow.format('dddd')
        .substring(0,3).toUpperCase();
    // displays the time
    real_time.html(moment_time);
    real_date.html(moment_date);
}, 1000);

Like any human being, I wanted more from the plugin. I want to display a counting time from a specific time rendered from the interval say momentNow = 02:22:30 PM .

Basically, the logic is this,

Pseudo code:

interval = setInterval(function() {
    var started = "02:22:30 PM";
    rendered_time.html(started);
}, 1000);

Answer 1

What you want is moment.diff(timestamp)

Example code

timestamp = moment().now()
setInterval(function() {
  rendered_time.html(moment(moment().diff(timestamp)).format("hh:mm:ss A"));
});

http://momentjs.com/docs/#/displaying/difference/

Answer 2

您可以简单地使用from （ 请参阅此处的文档 ）：

moment([2007, 0, 28]).from([2007, 0, 27])