JavaScript Instant equals()
Example
const date1 = Temporal.PlainDate.from("2026-05-17");
const date2 = Temporal.PlainDate.from("2026-05-17");
let result = date1.equals(date2);
Try it Yourself »
Description
The equals() method returns true if
this Instant is equal in value to another Instant.
The equals() method does not change the original Instant object.
Syntax
plaindate.equals(other)
Parameters
| Parameter | Description |
| other | A Plain Date. |
Return Value
| Type | Description |
| Boolean | true if then instant is equal in value to another instant. |
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>
