interface WebSocketError implements DOMExceptionallow-netPropertiesreadonlycloseCode: numberreadonlyreason: stringreadonlycloseCode: numberreadonlyreason: stringvariable WebSocketErrorallow-netUnstabletype{ readonly prototype: WebSocketError; new (message?: string, init?: WebSocketCloseInfo): WebSocketError; }type{ readonly prototype: WebSocketError; new (message?: string, init?: WebSocketCloseInfo): WebSocketError; }