![]() ![]() For instance on desktop OS's, Chrome and Firefox only receive notifications when the browser is running. Note: Whether notifications are received when the browser itself is not running depends on how the browser is integrated with the OS. This lets your app show push notifications to the user, even when it is not open in the browser. The service worker can receive push messages from a server when the app is not active.Because the service worker is not blocking (it's designed to be fully asynchronous) synchronous XHR and localStorage cannot be used in a service worker.It's essentially a JavaScript file that runs separately from the main browser thread, intercepting network requests, caching or retrieving resources from the cache, and delivering push messages.īecause workers run separately from the main thread, service workers are independent of the application they are associated with. ![]() A service worker is a type of web worker.
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