NavigateEvent: signal property

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 signal read-only property of the NavigateEvent interface returns an AbortSignal, which will become aborted if the navigation is cancelled (e.g. by the user pressing the browser's "Stop" button, or another navigation starting and thus cancelling the ongoing one).

Value

An AbortSignal object.

Examples

The general idea here is that the signal property can be passed to an associated fetch() operation so that if the navigation is cancelled, the fetch() operation can be safely aborted, avoiding wasting bandwidth on fetches that are no longer needed.

js
navigation.addEventListener("navigate", (event) => {
  event.intercept({
    async handler() {
      // ...

      await fetch(`/img/some-image.jpg`, { signal: event.signal });

      // ...
    },
  });
});

Note: See Example: next/previous buttons for a more detailed example.

Specifications

Specification
HTML
# dom-navigateevent-signal-dev

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
signal
Experimental

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support
Experimental. Expect behavior to change in the future.

See also