Temporal.PlainYearMonth.prototype.toPlainDate()

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 toPlainDate() method of Temporal.PlainYearMonth instances returns a new Temporal.PlainDate object representing this year-month and a supplied day in the same calendar system.

Syntax

js
toPlainDate(dayInfo)

Parameters

dayInfo Optional

An object representing the day component of the resulting PlainDate, containing the following property:

day

Corresponds to the day property.

Return value

A new Temporal.PlainDate object representing the date specified by this year-month and the day in dayInfo, interpreted in the calendar system of this year-month.

Exceptions

RangeError

Thrown if any of the options is invalid.

TypeError

Thrown if dayInfo is not an object.

Examples

Using toPlainDate()

js
const ym = Temporal.PlainYearMonth.from("2021-07");
const date = ym.toPlainDate({ day: 1 });
console.log(date.toString()); // 2021-07-01

const ym2 = Temporal.PlainYearMonth.from("2021-07-01[u-ca=chinese]");
const date2 = ym2.toPlainDate({ day: 15 });
console.log(date2.toString()); // 2021-06-24[u-ca=chinese]

Specifications

Specification
Temporal proposal
# sec-temporal.plainyearmonth.prototype.toplaindate

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
toPlainDate
Experimental

Legend

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

No support
No support
Experimental. Expect behavior to change in the future.
See implementation notes.
User must explicitly enable this feature.

See also