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• 句法
• 值
• 规范
• 浏览器兼容性
• 相关话题

WebSocket.extensions read-only property returns the extensions selected by the server. This is currently only the empty string or a list of extensions as negotiated by the connection.

句法

var extensions = aWebSocket.extensions;
					

值

A DOMString .

规范

规范	状态	注释
HTML 实时标准 The definition of 'WebSocket: extensions' in that specification.	实时标准	初始定义

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
extensions	Chrome Yes	Edge 12	Firefox 8	IE ?	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 8	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes

图例

完整支持

完整支持

兼容性未知 ?

兼容性未知

元数据

• 最后修改： Mar 18, 2019

相关话题

1. WebSocket
2. 构造函数

   1. WebSocket()
3. 特性

   1. binaryType
   2. bufferedAmount
   3. extensions
   4. onclose
   5. onerror
   6. onmessage
   7. onopen
   8. 协议
   9. readyState
   10. url
4. 方法

   1. close()
   2. send()
5. 事件

   1. error
   2. message
6. 继承：

   1. EventTarget