在此页

• 句法
• 范例
• 浏览器兼容性
• 另请参阅
• 相关话题

弃用
This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the 兼容性表格 at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

重要 : In modern browsers, this property has been deprecated. Service worker messages will now use the MessageEvent interface, for consistency with other web messaging features.

ports 只读特性在 ServiceWorkerMessageEvent interface returns an array of MessagePort objects connected with the message channel the message is being sent through.

句法

var myPorts = ServiceWorkerMessageEventInstance.ports;
					

值

An array of MessagePort 对象。

范例

When the following code is used inside the main thread to set up a message channel between it and a service worker for sending messages between the two, the event object of onmessage 将是 ServiceWorkerMessageEvent .

navigator.serviceWorker.ready.then(function(reg) {
  ...
      // set up a message channel to communicate with the SW
      var channel = new MessageChannel();
      channel.port1.onmessage = function(e) {
        console.log(e.ports);
        handleChannelMessage(e.data);
      }
      mySW = reg.active;
      mySW.postMessage('hello', [channel.port2]);
  });
					

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
ports 弃用	Chrome 45	Edge 17 17 16 Disabled Disabled From version 16: this feature is behind the Enable service workers preference.	Firefox 不支持 44 — 55 注意事项 44 — 55 注意事项 Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API. In Firefox 55 and later, the standard MessageEvent interface must be used instead.	IE 不支持 No	Opera 24	Safari 不支持 No	WebView Android 不支持 No	Chrome Android 45	Firefox Android 不支持 44 — 55	Opera Android 24	Safari iOS 不支持 No	Samsung Internet Android 4.0

图例

完整支持

完整支持

不支持

不支持

弃用。不要用于新网站。

弃用。不要用于新网站。

见实现注意事项。

用户必须明确启用此特征。

用户必须明确启用此特征。

另请参阅

• 使用服务工作者
• 服务工作者基本代码范例
• ServiceWorker 就绪了吗？
• Channel Messaging

元数据

• 最后修改： Dec 26, 2019

相关话题

1. 服务工作者 API
2. ServiceWorkerMessageEvent
3. 构造函数

   1. ServiceWorkerMessageEvent()
4. 特性

   1. data
   2. lastEventId
   3. origin
   4. ports
   5. source
5. Related pages for Service Workers API

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