Readonly CLOSEDReadonly CLOSINGReadonly CONNECTINGReadonly OPENReturns a string that indicates how binary data from the WebSocket object is exposed to scripts:
Can be set, to change how binary data is returned. The default is "blob".
Readonly bufferedReturns the number of bytes of application data (UTF-8 text and binary data) that have been queued using send() but not yet been transmitted to the network.
If the WebSocket connection is closed, this attribute's value will only increase with each call to the send() method. (The number does not reset to zero once the connection closes.)
Readonly extensionsReturns the extensions selected by the server, if any.
Readonly protocolReturns the subprotocol selected by the server, if any. It can be used in conjunction with the array form of the constructor's second argument to perform subprotocol negotiation.
Readonly readyReturns the state of the WebSocket object's connection. It can have the values described below.
Readonly urlReturns the URL that was used to establish the WebSocket connection.
Optional options: boolean | AddEventListenerOptionsOptional options: boolean | AddEventListenerOptionsDispatches a synthetic event event to target and returns true if either event's cancelable attribute value is false or its preventDefault() method was not invoked, and false otherwise.
Optional options: boolean | EventListenerOptionsOptional options: boolean | EventListenerOptionsTransmits data using the WebSocket connection. data can be a string, a Blob, an ArrayBuffer, or an ArrayBufferView.
Provides the API for creating and managing a WebSocket connection to a server, as well as for sending and receiving data on the connection.
MDN Reference