ServiceWorkerRegistration: updatefound event
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2018.
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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 updatefound
event of the
ServiceWorkerRegistration
interface is fired any time the ServiceWorkerRegistration.installing
property acquires a new service worker.
Syntax
Use the event name in methods like addEventListener()
, or set an event handler property.
js
addEventListener("updatefound", (event) => { })
onupdatefound = (event) => { }
Event type
A generic Event
.
Examples
js
const registration = await navigator.serviceWorker.getRegistration();
if (registration) {
registration.addEventListener("updatefound", () => {
console.log("Service Worker update found!");
});
}
Specifications
Specification |
---|
Service Workers # dom-serviceworkerregistration-onupdatefound |