Temporal.PlainDate.prototype.daysInWeek

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 daysInWeek accessor property of Temporal.PlainDate instances returns a positive integer representing the number of days in the week of this date. It is calendar-dependent.

For the ISO 8601 calendar, this is always 7, but in other calendar systems it may differ from week to week. All commonly supported calendars use 7-day weeks.

The set accessor of daysInWeek is undefined. You cannot change this property directly.

Examples

Using daysInWeek

js
const date = Temporal.PlainDate.from("2021-07-01");
console.log(date.daysInWeek); // 7

const date2 = Temporal.PlainDate.from("2021-07-01[u-ca=chinese]");
console.log(date2.daysInWeek); // 7

Specifications

Specification
Temporal proposal
# sec-get-temporal.plaindate.prototype.daysinweek

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
daysInWeek
Experimental

Legend

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

See also