CODEWITHSUNDEEP
momentjs
Runtime Terror
Runtime Terror

Reputation: 6742

Get date-time from past date-time + duration

The service returns a past date-time in ISO 8601 format like 2018-03-23T08:00:00Z and a duration in PnYnMnDTnHnMnS format like: PT3H. From those 2 values I need to calculate the date-time of the end of the duration. So in my case it would be 2018-03-23T11:00:00Z. I'm using moment.js for this. The problem is, when I'm tring to get the duration end date-time it returns a human readable string like in xy hours.

The problems I'm facing:

  1. It returns wrong duration. If I have PT3H it should return in 3 hours but it returns in 9 hours instead.
  2. The end date-time should be in milliseconds, currently its in "human readable form"

My code:

let dur = moment.duration("PT3H");
let myDate = moment("2018-03-23T08:00:00Z");
myDate.from(dur); // It returns "in 9 hours"

JsBin

Upvotes: 0

Views: 1029

Answers (1)

VincenzoC
VincenzoC

Reputation: 31482

You can add your duration to your date using add(Duration) and then use from.

Note that from accepts: Moment|String|Number|Date|Array while, in your code, you are passing a duration (dur).

You can use diff to get the difference in milliseconds.

If you want to get Unix timestamp of a moment object you can use valueOf().

Here a live sample:

let dur = moment.duration("PT3H");
let myDate = moment("2018-03-23T08:00:00Z");
let m2 = myDate.clone().add(dur);
console.log(m2.from(myDate));

let diff = m2.diff(myDate);
console.log(diff);
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.21.0/moment.min.js"></script>

Upvotes: 1

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