在此页

• 句法
• 范例
• 浏览器兼容性
• 另请参阅
• 相关话题

过时
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

activeWorker 只读特性在 InstallEvent interface returns the ServiceWorker that is currently actively controlling the page.

This will return null if no active worker is already controlling the page.

句法

var myActiveWorker = event.activeWorker
					

值

A ServiceWorker 对象。

范例

self.addEventListener('install', function(event) {
  var myActiveWorker = event.activeWorker;
});
					

浏览器兼容性

The compatibility table on 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. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
activeWorker	Chrome 40	Edge ≤79	Firefox 44 44 Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.	IE No	Opera 27	Safari No	WebView Android 40	Chrome Android 40	Firefox Android 44	Opera Android 27	Safari iOS No	Samsung Internet Android 4.0

图例

完整支持

完整支持

不支持

不支持

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

见实现注意事项。

另请参阅

• Promise
• 抓取 API

元数据

• 最后修改： Dec 8, 2019

相关话题

1. 服务工作者 API
2. InstallEvent
3. 构造函数

   1. InstallEvent()
4. 特性

   1. activeWorker
5. 继承：

   1. ExtendableEvent
   2. 事件
6. Related pages for Service Workers API

   1. 缓存
   2. CacheStorage
   3. Client
   4. Clients
   5. ExtendableEvent
   6. FetchEvent
   7. Navigator.serviceWorker
   8. NotificationEvent
   9. PeriodicSyncEvent
   10. PeriodicSyncManager
   11. PeriodicSyncRegistration
   12. ServiceWorker
   13. ServiceWorkerContainer
   14. ServiceWorkerGlobalScope
   15. ServiceWorkerRegistration
   16. SyncEvent
   17. SyncManager
   18. SyncRegistration
   19. WindowClient