Create a new web socket connection. The URL supplied in url must use the scheme ws. The protocols argument is either a String or List<String> specifying the subprotocols the client is willing to speak.

WebSocket(String url, [protocols]);

Returns the number of bytes currently buffered for transmission.

int get bufferedAmount();

Closes the web socket connection.

void close(int code, String reason);

The extensions property is initially the empty string. After the web socket connection is established this string reflects the extensions used by the server.

String get extensions();

Sets the callback to be called when the web socket connection is closed.

void set onclose(void callback(CloseEvent event));

Sets the callback to be called when the web socket connection encountered an error.

void set onerror(void callback(e));

Sets the callback to be called when a message have been received.

void set onmessage(void callback(MessageEvent event));

Sets the callback to be called when a web socket connection has been established.

void set onopen(void callback());

The protocol property is initially the empty string. After the web socket connection is established the value is the subprotocol selected by the server. If no subprotocol is negotiated the value will remain null.

String get protocol();

Returns the current state of the connection.

int get readyState();

Sends data on the web socket connection. The data in data must be either a String or List<int> holding bytes.

void send(data);