Countdown timer using Moment js

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

Here is fiddle for this.

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

Code :

<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.

Thanks for your time.

Update :

I end up doing like this :

<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.

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.

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);

Leniel Maccaferri

Check out this plugin:

moment-countdown

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

How it works?

//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'

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.

I created a demonstration here at codepen.io.

The 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:

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:

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 momentjs and 3rd line above updates as per countdownjs and all of this is animated at about ~60FPS because of requestAnimationFrame()

Code Snippet:

Alternatively you can just look at this code snippet:

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:

CountdownJS: http://countdownjs.org/ (And Rawgit to be able to use countdownjs)
MomentJS: http://momentjs.com/
requestAnimationFrame() - use this for animation rather than setInterval().

Optional Requirements:

jQuery: https://jquery.com/

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

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

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

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

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);

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

    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>

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

$.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:

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

来源：https://stackoverflow.com/questions/16129157/countdown-timer-using-moment-js

标签

javascript

jquery

countdown

unix-timestamp

momentjs