ServiceWorkerRegistration: backgroundFetch 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 backgroundFetch read-only property of the ServiceWorkerRegistration interface returns a reference to a BackgroundFetchManager object, which can be used to initiate background fetch operations.
Value
A BackgroundFetchManager object.
Examples
Initiating a background fetch
The following code accesses the backgroundFetch property and uses it to initiate a background fetch operation.
js
// main.js async function requestBackgroundFetch(movieData) { const swRegistration = await navigator.serviceWorker.ready; const fetchRegistration = await swRegistration.backgroundFetch.fetch( "download-movie", ["/my-movie-part-1.webm", "/my-movie-part-2.webm"], { icons: movieIcons, title: "Downloading my movie", downloadTotal: 60 * 1024 * 1024, label: "Downloading a show", }, ); // … } Specifications
| Specification |
|---|
| Background Fetch # dom-serviceworkerregistration-backgroundfetch |