How to calculate a duration between two dates in luxon?

javascript luxon
WoJ picture WoJ · Sep 6, 2020 · Viewed 16.3k times · Source

Luxon's documentation for the Duration.fromISO method describes it as

Create a Duration from an ISO 8601 duration string

Nowhere is mentioned the ability to create a duration based on two dates. My typical use case would be: "did the event between date ISODAT1 and ISODATE2 last more than an hour?".

What I will do is to transform the dates into a timestamp and check whether the difference is greater than 3600 (seconds), I believe however that there is a more native way to make the check.

Answer

hgb123 picture hgb123 · Sep 6, 2020

You could use DateTime's .diff (doc)

Return the difference between two DateTimes as a Duration.

const date1 = luxon.DateTime.fromISO("2020-09-06T12:00")
const date2 = luxon.DateTime.fromISO("2019-06-10T14:00")

const diff = date1.diff(date2, ["years", "months", "days", "hours"])

console.log(diff.toObject())
<script src="https://cdn.jsdelivr.net/npm/[email protected]/build/global/luxon.min.js"></script>

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