ContentIndexEvent: id property

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.


A String representation of the deleted content index id.


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.

self.addEventListener("contentdelete", (event) => {

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


Content Index
# dom-contentindexevent-id

Browser compatibility

BCD tables only load in the browser

See also