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jQuery 使用 Moment js 的倒数计时器

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时间：2020-08-26 16:30:23 　来源:igfitidea点击:

Countdown timer using Moment js

javascriptjquerycountdownunix-timestampmomentjs

提问by Arpit Rawat

I am making a countdown timer for an event page, i used moment js for this.

我正在为事件页面制作倒数计时器，为此我使用了 moment js。

Here is fiddlefor this.

这是小提琴。

I am calculating date difference between event date and current date (timestamp), then using "duration" method from moment js. But the time left is not coming as expected.
Expected- 00:30m:00s
Actual- 5h:59m:00s

我正在计算事件日期和当前日期（时间戳）之间的日期差异，然后使用 moment js 中的“持续时间”方法。但剩下的时间并没有像预期的那样到来。
预期- 00:30m:00s
实际- 5h:59m:00s

Code :

代码 ： 

<script>
  $(document).ready(function(){

    var eventTime = '1366549200';
    var currentTime = '1366547400';
    var time = eventTime - currentTime;
    var duration = moment.duration(time*1000, 'milliseconds');
    var interval = 1000;

    setInterval(function(){
      duration = moment.duration(duration.asMilliseconds() - interval, 'milliseconds');
      $('.countdown').text(moment(duration.asMilliseconds()).format('H[h]:mm[m]:ss[s]'));
    }, interval);
  });
  </script>

I read the momentjs documentation to figure out the problem, but no luck.

我阅读了 momentjs 文档以找出问题所在，但没有运气。

Thanks for your time.

谢谢你的时间。

Update :

更新 ：

I end up doing like this :

我最终这样做： 

<script>
  $(document).ready(function(){

    var eventTime = '1366549200';
    var currentTime = '1366547400';
    var leftTime = eventTime - currentTime;//Now i am passing the left time from controller itself which handles timezone stuff (UTC), just to simply question i used harcoded values.
    var duration = moment.duration(leftTime, 'seconds');
    var interval = 1000;

    setInterval(function(){
      // Time Out check
      if (duration.asSeconds() <= 0) {
        clearInterval(intervalId);
        window.location.reload(true); #skip the cache and reload the page from the server
      }

      //Otherwise
      duration = moment.duration(duration.asSeconds() - 1, 'seconds');
      $('.countdown').text(duration.days() + 'd:' + duration.hours()+ 'h:' + duration.minutes()+ 'm:' + duration.seconds() + 's');
    }, interval);
  });
  </script>

JS Fiddle.

JS小提琴。

回答by Diode

In the last statement you are converting the duration to time which also considers the timezone. I assume that your timezone is +530, so 5 hours and 30 minutes gets added to 30 minutes. You can do as given below.

在最后一条语句中，您将持续时间转换为也考虑时区的时间。我假设您的时区是 +530，所以 5 小时 30 分钟被添加到 30 分钟。您可以按照下面的说明进行操作。

var eventTime= 1366549200; // Timestamp - Sun, 21 Apr 2013 13:00:00 GMT
var currentTime = 1366547400; // Timestamp - Sun, 21 Apr 2013 12:30:00 GMT
var diffTime = eventTime - currentTime;
var duration = moment.duration(diffTime*1000, 'milliseconds');
var interval = 1000;

setInterval(function(){
  duration = moment.duration(duration - interval, 'milliseconds');
    $('.countdown').text(duration.hours() + ":" + duration.minutes() + ":" + duration.seconds())
}, interval);

回答by Leniel Maccaferri

Check out this plugin:

看看这个插件：

moment-countdown

倒计时

moment-countdown is a tiny moment.jsplugin that integrates with Countdown.js. The file is here.

moment-countdown 是一个与Countdown.js集成的小moment.js插件 。文件在这里。

How it works?

这个怎么运作？

//from then until now
moment("1982-5-25").countdown().toString(); //=> '30 years, 10 months, 14 days, 1 hour, 8 minutes, and 14 seconds'

//accepts a moment, JS Date, or anything parsable by the Date constructor
moment("1955-8-21").countdown("1982-5-25").toString(); //=> '26 years, 9 months, and 4 days'

//also works with the args flipped, like diff()
moment("1982-5-25").countdown("1955-8-21").toString(); //=> '26 years, 9 months, and 4 days'

//accepts all of countdown's options
moment().countdown("1982-5-25", countdown.MONTHS|countdown.WEEKS, NaN, 2).toString(); //=> '370 months, and 2.01 weeks'

回答by Jeremy Iglehart

Although I'm sure this won't be accepted as the answer to this very old question, I came here looking for a way to do this and this is how I solved the problem.

虽然我确信这不会被接受作为这个非常古老问题的答案，但我来到这里是为了寻找一种方法来解决这个问题，这就是我解决问题的方法。

I created a demonstration here at codepen.io.

我在 codepen.io 上创建了一个演示。

The Html:

Html：

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.13.0/moment.min.js" type="text/javascript"></script>
<script src="https://cdn.rawgit.com/mckamey/countdownjs/master/countdown.min.js" type="text/javascript"></script>
<script src="https://code.jquery.com/jquery-3.0.0.min.js" type="text/javascript"></script>
<div>
  The time is now: <span class="now"></span>, a timer will go off <span class="duration"></span> at <span class="then"></span>
</div>
<div class="difference">The timer is set to go off <span></span></div>
<div class="countdown"></div>

The Javascript:

Javascript：

var now = moment(); // new Date().getTime();
var then = moment().add(60, 'seconds'); // new Date(now + 60 * 1000);

$(".now").text(moment(now).format('h:mm:ss a'));
$(".then").text(moment(then).format('h:mm:ss a'));
$(".duration").text(moment(now).to(then));
(function timerLoop() {
  $(".difference > span").text(moment().to(then));
  $(".countdown").text(countdown(then).toString());
  requestAnimationFrame(timerLoop);
})();

Output:

输出：

The time is now: 5:29:35 pm, a timer will go off in a minute at 5:30:35 pm
The timer is set to go off in a minute
1 minute

Note: 2nd line above updates as per momentjsand 3rd line above updates as per countdownjsand all of this is animated at about ~60FPS because of requestAnimationFrame()

注意：上面的第 2 行按照momentjs更新，上面的第 3 行按照countdownjs更新，所有这些都以大约 60FPS 的速度进行动画处理，因为requestAnimationFrame()

Code Snippet:

代码片段：

Alternatively you can just look at this code snippet:

或者，您可以查看此代码片段：

var now = moment(); // new Date().getTime();
var then = moment().add(60, 'seconds'); // new Date(now + 60 * 1000);

$(".now").text(moment(now).format('h:mm:ss a'));
$(".then").text(moment(then).format('h:mm:ss a'));
$(".duration").text(moment(now).to(then));
(function timerLoop() {
  $(".difference > span").text(moment().to(then));
  $(".countdown").text(countdown(then).toString());
  requestAnimationFrame(timerLoop);
})();

// CountdownJS: http://countdownjs.org/
// Rawgit: http://rawgit.com/
// MomentJS: http://momentjs.com/
// jQuery: https://jquery.com/
// Light reading about the requestAnimationFrame pattern:
// http://www.paulirish.com/2011/requestanimationframe-for-smart-animating/
// https://css-tricks.com/using-requestanimationframe/
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.13.0/moment.min.js" type="text/javascript"></script>
<script src="https://cdn.rawgit.com/mckamey/countdownjs/master/countdown.min.js" type="text/javascript"></script>
<script src="https://code.jquery.com/jquery-3.0.0.min.js" type="text/javascript"></script>
<div>
  The time is now: <span class="now"></span>,
</div>
<div>
  a timer will go off <span class="duration"></span> at <span class="then"></span>
</div>
<div class="difference">The timer is set to go off <span></span></div>
<div class="countdown"></div>

Requirements:

要求：

Optional Requirements:

可选要求：

Additionally here is some light reading about the requestAnimationFrame()pattern:

此外，这里有一些关于该requestAnimationFrame()模式的轻松阅读：

I found the requestAnimationFrame()pattern to be much a more elegant solution than the setInterval()pattern.

我发现requestAnimationFrame()模式是比setInterval()模式更优雅的解决方案。

回答by amackay11

I thought I'd throw this out there too (no plugins). It counts down for 10 seconds into the future.

我想我也会把它扔出去（没有插件）。它倒计时 10 秒到未来。 

    var countDownDate = moment().add(10, 'seconds');

      var x = setInterval(function() {
        diff = countDownDate.diff(moment());
    
        if (diff <= 0) {
          clearInterval(x);
           // If the count down is finished, write some text 
          $('.countdown').text("EXPIRED");
        } else
          $('.countdown').text(moment.utc(diff).format("HH:mm:ss"));

      }, 1000);
<script src="https://momentjs.com/downloads/moment.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div class="countdown"></div>

回答by Lemurr

Timezones. You have to deal with them, by using getTimezoneOffset()if you want your visitors from around the wolrd to get the same time.

时区。getTimezoneOffset()如果您希望来自世界各地的访问者获得相同的时间，则必须通过使用来处理它们。

Try this http://jsfiddle.net/cxyms/2/, it works for me, but I'm not sure will it work with other timezones.

试试这个http://jsfiddle.net/cxyms/2/，它对我有用，但我不确定它是否适用于其他时区。

var eventTimeStamp = '1366549200'; // Timestamp - Sun, 21 Apr 2013 13:00:00 GMT
var currentTimeStamp = '1366547400'; // Timestamp - Sun, 21 Apr 2013 12:30:00 GMT

var eventTime = new Date();
eventTime.setTime(366549200);

var Offset = new Date(eventTime.getTimezoneOffset()*60000)

var Diff = eventTimeStamp - currentTimeStamp + (Offset.getTime() / 2);
var duration = moment.duration(Diff, 'milliseconds');
var interval = 1000;

setInterval(function(){
  duration = moment.duration(duration.asMilliseconds() - interval, 'milliseconds');
  $('.countdown').text(moment(duration.asMilliseconds()).format('H[h]:mm[m]:ss[s]'));
}, interval);

回答by Stephen R

The following also requires the moment-duration-format plugin:

以下还需要moment-duration-format 插件：

$.fn.countdown = function ( options ) {
    var $target = $(this);
    var defaults = {
        seconds: 0,
        format: 'hh:mm:ss',
        stopAtZero: true
    };
    var settings = $.extend(defaults, options);
    var eventTime = Date.now() + ( settings.seconds * 1000 );
    var diffTime = eventTime - Date.now();
    var duration = moment.duration( diffTime, 'milliseconds' );
    var interval = 0;
    $target.text( duration.format( settings.format, { trim: false }) );
    var counter = setInterval(function () {
        $target.text( moment.duration( duration.asSeconds() - ++interval, 'seconds' ).format( settings.format, { trim: false }) );
        if( settings.stopAtZero && interval >= settings.seconds ) clearInterval( counter );
    }, 1000);
};

Usage example:

用法示例：

$('#someDiv').countdown({
    seconds: 30*60,
    format: 'mm:ss'
});

回答by Andrew Samole

Here's my timer for 5 minutes:

这是我的 5 分钟计时器：

var start = moment("5:00", "m:ss");
var seconds = start.minutes() * 60;
this.interval = setInterval(() => {
    this.timerDisplay = start.subtract(1, "second").format("m:ss");
    seconds--;
    if (seconds === 0) clearInterval(this.interval);
}, 1000);

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