WebSocket: protocol property
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The WebSocket.protocol read-only property returns the
name of the sub-protocol the server selected; this will be one of the strings specified
in the protocols parameter when creating the WebSocket
object, or the empty string if no connection is established.
Value
A string.
Specifications
| Specification |
|---|
| WebSockets Standard # ref-for-dom-websocket-protocol① |
Browser compatibility
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