Temporal.PlainDateTime.prototype.era

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 era accessor property of Temporal.PlainDateTime instances returns a calendar-specific lowercase string representing the era of this date, or undefined if the calendar does not use eras (e.g. ISO 8601). era and eraYear together uniquely identify a year in a calendar, in the same way that year does. It is calendar-dependent.

The set accessor of era is undefined. You cannot change this property directly. Use the with() method to create a new Temporal.PlainDateTime object with the desired new value.

For general information and more examples, see Temporal.PlainDate.prototype.era.

Examples

Using era

js
const dt = Temporal.PlainDateTime.from("2021-07-01"); // ISO 8601 calendar
console.log(dt.era); // undefined

const dt2 = Temporal.PlainDateTime.from("2021-07-01[u-ca=gregory]");
console.log(dt2.era); // gregory

Specifications

Specification
Temporal proposal
# sec-get-temporal.plaindatetime.prototype.era

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
era
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