Interface WebSocketLike

interface WebSocketLike {
    readyState: number;
    onopen?: (event?: unknown) => void;
    onmessage?: (event: WebSocketMessageEventLike) => void;
    onerror?: (event: unknown) => void;
    onclose?: (event?: unknown) => void;
    send: (
        data: string | ArrayBufferLike | ArrayBufferView<ArrayBufferLike>,
    ) => void;
    close: (code?: number, reason?: string) => void;
    ping?: () => void;
    pong?: () => void;
}