BASELINE NowYouCanUse.com
Widely Available
id: websockets

WebSockets

The WebSocket API opens a two-way communication channel between the user's browser and a server.
Baseline Status: Achieved Widely Available on Jan 29, 2018 (Cross-browser Newly Available since Jul 29, 2015).
Desktop Browser Engine Support
Google Chrome
5
Supported
Mozilla Firefox
11
Supported
Apple Safari
5
Supported
Microsoft Edge
12
Supported
Mobile Browser Engine Support
Chrome Android
18
Firefox Android
14
Safari iOS
4.2
Specifications and References
Specification ↗ Can I Use (websockets) ↗ Feature XML ↗
MDN Browser Compat Data Keys:
api.CloseEvent ↗ api.CloseEvent.CloseEvent ↗ api.CloseEvent.code ↗ api.CloseEvent.reason ↗ api.CloseEvent.wasClean ↗ api.WebSocket ↗ api.WebSocket.WebSocket ↗ api.WebSocket.WebSocket.url_parameter_http_https_relative ↗ api.WebSocket.binaryType ↗ api.WebSocket.bufferedAmount ↗ api.WebSocket.close ↗ api.WebSocket.close_event ↗ api.WebSocket.error_event ↗ api.WebSocket.extensions ↗ api.WebSocket.message_event ↗ api.WebSocket.open_event ↗ api.WebSocket.protocol ↗ api.WebSocket.protocol_rfc_6455 ↗ api.WebSocket.readyState ↗ api.WebSocket.send ↗ api.WebSocket.url ↗ api.WebSocket.worker_support ↗ api.WebSocketError ↗ api.WebSocketError.WebSocketError ↗ api.WebSocketError.closeCode ↗ api.WebSocketError.reason ↗ http.headers.Sec-WebSocket-Accept ↗ http.headers.Sec-WebSocket-Extensions ↗ http.headers.Sec-WebSocket-Key ↗ http.headers.Sec-WebSocket-Protocol ↗ http.headers.Sec-WebSocket-Version ↗