使用Moment js的倒数计时器

Question

我正在为一个事件页面制作一个倒数计时器,我用了这个时刻js.

这是小提琴.

我正在计算事件日期和当前日期(时间戳)之间的日期差异,然后使用从时刻js开始的"持续时间"方法.但剩下的时间并没有像预期的那样到来.
预计 - 00:30m:00s
Actual - 5h:59m:00s

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>

我阅读了momentjs文档以找出问题,但没有运气.

谢谢你的时间.

更新:

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小提琴.

Answer 1

在最后一个语句中,您将持续时间转换为也考虑时区的时间.我假设你的时区是+530,所以5小时30分钟就会增加到30分钟.你可以按照下面给出的那样做.

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);

Answer 2

看看这个插件:

那一刻,倒计时

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

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'

Answer 3

虽然我确信这不会被接受为这个非常古老的问题的答案,但我来到这里寻找一种方法来做到这一点,这就是我解决问题的方法.

我在codepen.io上创建了一个演示.

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>

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);
})();

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

注意:根据momentjs更新上面的第二行和根据countdownjs更新的第三行,所有这些都是大约~60FPS的动画,因为requestAnimationFrame()

代码片段:

或者,您可以查看此代码段:

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>

要求:

• CountdownJS:http://countdownjs.org/(和Rawgit能够使用countdownjs)
• MomentJS:http://momentjs.com/
• requestAnimationFrame()- 用它来制作动画而不是setInterval().

可选要求:

• jQuery:https://jquery.com/

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

• http://www.paulirish.com/2011/requestanimationframe-for-smart-animating/
• https://css-tricks.com/using-requestanimationframe/

我发现这种requestAnimationFrame()模式比setInterval()模式更优雅.

Answer 4

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>