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javascriptdatemomentjsdate-difference
Harper Creek
Harper Creek

Reputation: 437

Moment.js Duration between Two Dates

How do I get the time difference between two different dates variables, specifically in years, months and days using moment.js?

I found this method but I keep getting weird results. Sometimes the result is one month ahead so I added a subtract one months part to make the result correct, but when the difference between the two dates can be divided into whole years it then becomes a month behind, but then if I remove the subtract month part, it gets even more out of whack.

Also I would like to format it as "X Years, Y Months, Z days", but also can't figure out how to format it in such way.

var dateOne = new Date(2000,07,16);
var dateTwo = new Date (1990,07,16);
var updatedDate = moment(dateOne).format('ll');
   
var x = moment(dateOne, 'DD/MM/YYYY').diff(moment(dateTwo, 'DD/MM/YYYY'))
var y = moment.duration(x);
var why = moment(x).subtract(1, 'M');
var z = Math.floor(y.asYears()) + moment.utc(why).format('/MM/DD');
console.log(z);
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.24.0/moment.min.js"></script>

Upvotes: 1

Views: 5694

Answers (3)

Tigran Asatryan
Tigran Asatryan

Reputation: 41

Moment is having a method called .diff() Use that one. https://momentjs.com/docs/#/displaying/difference/

Upvotes: 1

VincenzoC
VincenzoC

Reputation: 31482

As stated by others in the comments, you can't format a duration as a date and since dateOne and dateTwo are a Date objects, there is no need for the second argument in moment(dateOne, 'DD/MM/YYYY'), simply use moment(Date).

Moverover, please note that when you use new Date(year, monthIndex, day) monthIndex starts from 0, see MDN docs:

The argument monthIndex is 0-based. This means that January = 0 and December = 11.

You can use moment-duration-format plug-in to format momentjs duration according your needs, see format() docs on the plug-in page.

Here a live sample:

var dateOne = new Date(2000, 7, 16);
var dateTwo = new Date(1990, 7, 16);

var diff = moment(dateOne).diff(moment(dateTwo))
var dur = moment.duration(diff);
var result = dur.format();
console.log(result);
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.24.0/moment.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment-duration-format/2.2.2/moment-duration-format.min.js"></script>

Upvotes: 1

Rudolf Lamprecht
Rudolf Lamprecht

Reputation: 1070

Try this perhaps?

var firstDate = moment();
var secondDate = moment("2018-03-19");
var yearDiff = firstDate.diff(secondDate, "year");
var monthDiff = firstDate.diff(secondDate, "month");
var dayDiff = firstDate.diff(secondDate, "day");
console.log(yearDiff + " Years, " + monthDiff + " Months, " + dayDiff + " Days");

https://jsfiddle.net/px1brLdk/

Upvotes: 1

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