WebSocket.extensions
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 |
|---|
| HTML Standard (HTML) # dom-websocket-extensions-dev |
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
extensions |
16 |
12 |
8 |
10 |
12.1 |
6 |
≤37 |
18 |
8 |
12.1 |
6 |
1.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/WebSocket/extensions