ContentIndexEvent: id 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.

Note: This feature is only available in Service Workers.

The id read-only property of the ContentIndexEvent interface is a String which identifies the deleted content index via its id.

Value

A String representation of the deleted content index id.

Examples

This example listens for the contentdelete event and logs the removed content index id.

The ContentIndexEvent is only available to the global scope of a ServiceWorker.

js
self.addEventListener("contentdelete", (event) => {
  console.log(event.id);

  // logs content index id, which can then be used to determine what content to delete from your cache
});

Specifications

Specification
Content Index
# dom-contentindexevent-id

Browser compatibility

desktop mobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
id
Experimental
Chrome – No support
Chrome
footnote No support
Edge – No support
Edge
footnote No support
Firefox – No support
Firefox
footnote No support
Opera – No support
Opera
footnote No support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 84 (Release date: 2020-07-27)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 60 (Release date: 2020-09-23)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – Full support
Samsung Internet 14 (Release date: 2021-04-17)
footnote Full support
WebView Android – Full support
WebView Android 84 (Release date: 2020-07-27)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support

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