work out time left

[seabannan]

What i am trying to do is do a countdown to work out the time left from now.

example i have

    var countDownTill = '2012-11-19 00:00:00 +0000';
    document.write(moment(countDownTill).diff(moment(), 'months') + " months<br>");
    document.write(moment(countDownTill).diff(moment(), 'weeks') + " weeks<br>");
    document.write(moment(countDownTill).diff(moment(), 'days') + " days<br>");

which will output

    0 months
    1 weeks
    4 days

but its not working out overall its doing it individuals for each value (days,weeks,months)

so if i up the date by say 12 months like below.

    var countDownTill = '2013-11-19 00:00:00 +0000';
     document.write(moment(countDownTill).diff(moment(), 'months') + " months<br>");   
     document.write(moment(countDownTill).diff(moment(), 'weeks') + " weeks<br>");
     document.write(moment(countDownTill).diff(moment(), 'days') + " days<br>");

it outputs.

    12 months
    53 weeks
    369 days

where as i am trying to get it to output

    12 months
    2 weeks
    5 days

example here
http://jsfiddle.net/fDmWH/3/

I posted on stack overflow and go some help but their still seems to be issues with weeks here is the solution we came to.

// Start date
var countDownTill = new Date('2013-11-19 00:00:00 +0000');
var now = new Date();

document.write(countDownTill + '<br />');

// Get the months
var months = moment(countDownTill).diff(moment(), 'months');
console.log(months);

// Add months to the date
now.setMonth(now.getMonth() + months);
document.write(now + '<br />');

// Get the weeks
var weeks = moment(countDownTill).diff(now, 'weeks');
// Seems like moment is doing something wrong here... it should be 0 weeks...
// 15 Nov to 19 Nov is 0 weeks to me at least...
console.log(weeks);

// Add the weeks to the date
now.setDate(now.getDate() + (7 * weeks));
document.write(now + '<br />');

var days = moment(countDownTill).diff(now, 'days');

document.write(months + ' months ');
document.write(weeks + ' weeks ');
document.write(days + ' days ');

http://jsfiddle.net/fDmWH/6/

[seabannan]

Really need help with this it always seems to end up 1 day out any suggestions?

[ichernev]

You should pass true as a third argument to diff to disable rounding, and do Math.floor instead.

Check this: http://jsfiddle.net/x5LnX/1/

[seabannan]

ok thanks ;)

[timrwood]

It may be better to use the duration object for this.

var diff = moment('2012-11-19T00:00:00+0000').diff(moment()); // in milliseconds
var duration = moment.duration(diff);

console.log(duration.years() + ' years');               // 0 years
console.log(duration.months() + ' months');             // 0 months
console.log(duration.days() + ' days');                 // 2 days
console.log(duration.hours() + ' hours');               // 6 hours
console.log(duration.minutes() + ' minutes');           // 43 minutes
console.log(duration.seconds() + ' seconds');           // 41 seconds
console.log(duration.milliseconds() + ' milliseconds'); // 250 milliseconds

Formatting durations has been addressed a few times, see #463 and #264