fetchLater

The fetchLater() method requests a deferred fetch sent at an unknown time. The browser chooses a reliable time to send the request, ideally when the document is unloaded, and ignores the response. This API is useful for sending beacons to a server without expecting a particular response.

Baseline Status: This feature is currently Limited and is missing in at least one major browser engine.

Desktop Browser Engine Support

Google Chrome

135

Supported

Mozilla Firefox

—

Unsupported

Apple Safari

—

Unsupported

Microsoft Edge

135

Supported

Mobile Browser Engine Support

Chrome Android

135

Firefox Android

—

Safari iOS

—

Specifications and References

Specification ↗ Feature XML ↗

MDN Browser Compat Data Keys:

api.FetchLaterResult ↗ api.FetchLaterResult.activated ↗ api.Window.fetchLater ↗ http.headers.Permissions-Policy.deferred-fetch ↗ http.headers.Permissions-Policy.deferred-fetch-minimal ↗