Temporal.Duration.from()

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The Temporal.Duration.from() static method creates a new Temporal.Duration object from another Temporal.Duration object, an object with duration properties, or an ISO 8601 string.

Syntax

js
Temporal.Duration.from(info)

Parameters

info

One of the following:

Return value

A new Temporal.Duration object, possibly unbalanced, with the specified components.

Exceptions

RangeError

Thrown in one of the following cases:

  • Any of the recognized properties in the info object is not an integer (including non-finite values).
  • A calendar unit (years, months, weeks) has an absolute value ≥ 232.
  • The non-calendar part of the duration (days and below), when expressed in seconds, has an absolute value ≥ 253.
TypeError

Thrown in one of the following cases:

  • info is not an object or a string.
  • All of the recognized properties in the info object are undefined.

Examples

Creating a duration from an object

js
const d1 = Temporal.Duration.from({ hours: 1, minutes: 30 });
console.log(d1.toString()); // "PT1H30M"

const d2 = Temporal.Duration.from({ months: 1, days: 2 });
console.log(d2.toString()); // "P1M2D"

// Uncommon because unbalanced, but valid
const unbalanced = Temporal.Duration.from({
  hours: 100,
  minutes: 100,
  seconds: 100,
});
console.log(unbalanced.toString()); // "PT100H100M100S"

const neg = Temporal.Duration.from({ hours: -1, minutes: -30 });
console.log(neg.toString()); // "-PT1H30M"

Creating a duration from a string

js
const d = Temporal.Duration.from("P1Y2M3W4DT5H6M7.00800901S");
console.log(d.hours); // 5

Creating a duration from another duration

js
const d1 = Temporal.Duration.from({ hours: 1, minutes: 30 });
const d2 = Temporal.Duration.from(d1);
console.log(d2.toString()); // "PT1H30M"

Specifications

Specification
Temporal proposal
# sec-temporal.duration.from

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
Node.js
from
Experimental

Legend

Tip: you can click/tap on a cell for more information.

In development. Supported in a pre-release version.
In development. Supported in a pre-release version.
No support
No support
Experimental. Expect behavior to change in the future.
See implementation notes.
User must explicitly enable this feature.

See also