ServiceWorkerGlobalScope: contentdelete event

{{APIRef("Content Index API")}}{{SeeCompatTable}}{{SecureContext_Header}}{{AvailableInWorkers("service")}}

The contentdelete event of the {{domxref("ServiceWorkerGlobalScope")}} interface is fired when an item is removed from the indexed content via the user agent.

This event is not cancelable and does not bubble.

Syntax

Use the event name in methods like {{domxref("EventTarget.addEventListener", "addEventListener()")}}, or set an event handler property.

addEventListener("contentdelete", (event) => { })

oncontentdelete = (event) => { }

Event type

A {{domxref("ContentIndexEvent")}}. Inherits from {{domxref("Event")}}.

{{InheritanceDiagram("ContentIndexEvent")}}

Event properties

In addition to the properties listed below, this interface inherits the properties of its parent interface, {{domxref("Event")}}.

• {{domxref("ContentIndexEvent.id", "id")}} {{ReadOnlyInline}}
  • : A string which identifies the deleted content index via it's id.

Examples

The following example uses a contentdelete event handler to remove cached content related to the deleted index item.

self.addEventListener("contentdelete", (event) => {
  const deletion = caches
    .open("cache-name")
    .then((cache) =>
      Promise.all([
        cache.delete(`/icon/${event.id}`),
        cache.delete(`/content/${event.id}`),
      ]),
    );
  event.waitUntil(deletion);
});

You can also set up the event handler using the oncontentdelete property:

self.oncontentdelete = (event) => {
  // …
};

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• Content index API
• An introductory article on the Content Index API