WebSocketsThe WebSocket API opens a two-way communication channel between the user's browser and a server.widely2015-07-292018-01-29https://websockets.spec.whatwg.org/websocketshttps://developer.mozilla.org/docs/Web/API/WebSocketapi.CloseEventapi.CloseEvent.CloseEventapi.CloseEvent.codeapi.CloseEvent.reasonapi.CloseEvent.wasCleanapi.WebSocketapi.WebSocket.WebSocketapi.WebSocket.WebSocket.url_parameter_http_https_relativeapi.WebSocket.binaryTypeapi.WebSocket.bufferedAmountapi.WebSocket.closeapi.WebSocket.close_eventapi.WebSocket.error_eventapi.WebSocket.extensionsapi.WebSocket.message_eventapi.WebSocket.open_eventapi.WebSocket.protocolapi.WebSocket.protocol_rfc_6455api.WebSocket.readyStateapi.WebSocket.sendapi.WebSocket.urlapi.WebSocket.worker_supportapi.WebSocketErrorapi.WebSocketError.WebSocketErrorapi.WebSocketError.closeCodeapi.WebSocketError.reasonhttp.headers.Sec-WebSocket-Accepthttp.headers.Sec-WebSocket-Extensionshttp.headers.Sec-WebSocket-Keyhttp.headers.Sec-WebSocket-Protocolhttp.headers.Sec-WebSocket-Versionhttps://nowyoucanuse.com/features--websockets.html