Navigator.serviceWorker 只读属性，返回 关联文件 的 ServiceWorkerContainer 对象，它提供对ServiceWorker 的注册，删除，升级和通信的访问。。
语法
let workerContainerInstance = navigator.serviceWorker;
值
规范
| Specification | Status | Comment |
|---|---|---|
| Service Workers navigator.serviceWorker |
Working Draft | Initial definition. |
浏览器兼容性
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This compatibility table still uses the old format,
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| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | 40.0 | 44.0 (44.0)[1] | 未实现 | 24 | 未实现 |
| Feature | Android | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|
| Basic support | ? | 44.0 (44.0) | (Yes) | 未实现 | ? | 未实现 | ? |
[1] Service workers (and Push) have been disabled in the Firefox 45 Extended Support Release (ESR.)