ServiceWorkerRegistration: index 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.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
Note: This feature is available in Web Workers.
The index read-only property of the ServiceWorkerRegistration interface returns a reference to the ContentIndex interface, which allows for indexing of offline content.
Value
A ContentIndex object.
Examples
You can access the property from either your main script or the registered service worker.
Here is an example from the main script:
js
// reference registration const registration = await navigator.serviceWorker.ready; // feature detection if ("index" in registration) { // Content Index API functionality const contentIndex = registration.index; } From the service worker:
js
// service worker script const contentIndex = self.registration.index; Specifications
| Specification |
|---|
| Content Index # dom-serviceworkerregistration-index |