Temporal.PlainYearMonth.prototype.daysInMonth
Baseline Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
The daysInMonth accessor property of Temporal.PlainYearMonth instances returns a positive integer representing the number of days in the month of this date. It is calendar-dependent.
The set accessor of daysInMonth is undefined. You cannot change this property directly.
For general information and more examples, see Temporal.PlainDate.prototype.daysInMonth.
Examples
Using daysInMonth
const ym = Temporal.PlainYearMonth.from("2021-07");
console.log(ym.daysInMonth); // 31
Specifications
Browser compatibility
| 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 | |
daysInMonth |
144 |
144 |
139 |
128 |
preview |
144 |
139 |
95 |
No |
No |
144 |
No |
1.4.0 |
2.7 |
26.0.0 |
See also
Temporal.PlainYearMonthTemporal.PlainYearMonth.prototype.with()Temporal.PlainYearMonth.prototype.add()Temporal.PlainYearMonth.prototype.subtract()Temporal.PlainYearMonth.prototype.yearTemporal.PlainYearMonth.prototype.monthTemporal.PlainYearMonth.prototype.daysInYearTemporal.PlainDate.prototype.daysInMonth
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/PlainYearMonth/daysInMonth
