PlainMonthDay equals()
Example
const date1 = Temporal.PlainMonthDay.from("05-17");
const date2 = Temporal.PlainMonthDay.from("06-17");
let result = date1.equals(date2);
Try it Yourself »
Description
The equals() method returns true
if this date is equal in value to the other date.
The equals() method does not change the original PlainMonthDay.
Syntax
plainmonthday.equals(other)
Parameters
| Parameter | Description |
| other | Another PlainMonthDay. |
Return Value
| Type | Description |
| Boolean | true if this date is equal in value to the other date. |
Note
The equals() method compares only values of the same type.
Other Temporal types must be converted before comparison.
Browser Support
Temporal is a major update to the JavaScript standard (TC39).
It is currently supported in Chrome, Edge, Firefox, and Opera and is expected to reach full availability across browsers before the summer of 2026.
| Chrome 144 |
Edge 144 |
Firefox 139 |
Safari |
Opera 128 |
| Jan 2026 | Jan 2026 | May 2025 | 🚫 | Feb 2026 |
The Safari implementation can be tested in Safari Technology Preview by enabling the --use-temporal runtime flag.
Polyfill
Until Safari support Temporal natively, you can use the official polyfill:
<script
src="https://cdn.jsdelivr.net/npm/@js-temporal/polyfill/dist/index.umd.js">
</script>
