web api instance property
WebSocket: extensions property
Available in workers
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.
Value
A string.
Specifications
SpecificationsStandards references are available on the canonical MDN page.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.