This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The onupdatefound property of the ServiceWorkerRegistration interface is an EventListener property called whenever an event of type statechange is fired; it is fired any time the ServiceWorkerRegistration.installing property acquires a new service worker.
Note: This feature is available in Web Workers.
ServiceWorkerRegistration.onupdatefound = function() { ... }; | Specification | Status | Comment |
|---|---|---|
| Service Workers The definition of 'ServiceWorkerRegistration.onupdatefound' in that specification. | Editor's Draft | Initial definition. |
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|---|
| Basic support | 40.0 | (Yes)[2] | 44.0 (44.0)[1] | No support | ? | No support |
| Available in web workers | (Yes) | ? | 44.0 (44.0)[1] | No support | ? | No support |
| Feature | Android | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|
| Basic support | ? | 44.0 (44.0) | (Yes) | No support | ? | No support | ? |
| Available in web workers | ? | (Yes) | ? | No support | ? | No support | ? |
[1] Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR.)
[2] Service workers is available in Microsoft Edge starting EdgeHTML 16 behind a flag.
Promise
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https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerRegistration/onupdatefound