The 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.
Syntax
var extensions = aWebSocket.extensions;
Value
A DOMString
.
Specifications
Specification | Status | Comment |
---|---|---|
HTML Living StandardThe definition of 'WebSocket: extensions' in that specification. | Living Standard | Initial definition |
Browser compatibility
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.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
extensions
|
Chrome
Full support Yes |
Edge
Full support 12 |
Firefox
Full support 8 |
IE
? |
Opera
Full support Yes |
Safari
Full support Yes |
WebView Android
Full support Yes |
Chrome Android
Full support Yes |
Firefox Android
Full support 8 |
Opera Android
Full support Yes |
Safari iOS
Full support Yes |
Samsung Internet Android
Full support Yes |
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown
WebSocket.extensions by Mozilla Contributors is licensed under CC-BY-SA 2.5.