This feature is not Baseline because it does not work in some of the most widely-used browsers.
The toPlainYearMonth() method of Temporal.PlainDate instances returns a new Temporal.PlainYearMonth object representing the year and month of this date in the same calendar system.
toPlainYearMonth()
None.
A new Temporal.PlainYearMonth object representing the year and month of this date in the same calendar system.
const date = Temporal.PlainDate.from("2021-07-01");
const yearMonth = date.toPlainYearMonth();
console.log(yearMonth.toString()); // 2021-07
| Desktop | Mobile | Server | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | Bun | Deno | Node.js | |
toPlainYearMonth |
144 | 144 | 139 | No | No | 144 | 139 | No | No | No | 144 | No | ? | 1.40 | No |
© 2005–2025 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/PlainDate/toPlainYearMonth