This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The waiting property of the ServiceWorkerRegistration interface returns a service worker whose ServiceWorker.state is installed. This property is initially set to null.
Note: This feature is available in Web Workers.
Syntax
sw = ServiceWorker.waiting
Value
A ServiceWorker object, if it is currently in an installed state.
Specifications
| Specification | Status | Comment |
|---|---|---|
| Service Workers The definition of 'ServiceWorkerRegistration.waiting' in that specification. |
Working Draft | Initial definition. |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 40 | 161 17 | 442 | No | 27 | No |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | 40 | 40 | ? | 44 | 27 | No | 4.0 |
1. From version 16: this feature is behind the Enable service workers preference.
2. Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR).