export default class WebSocket {
    static OPEN: number;
    static CONNECTING: number;
    static CLOSING: number;
    static CLOSED: number;
    private socket;
    private listeners;
    constructor(url: string | URL, options?: string | string[] | {
        headers?: Record<string, string>;
        [key: string]: any;
    });
    get readyState(): 0 | 2 | 1 | 3;
    send(data: string | ArrayBufferLike | Blob | ArrayBufferView): void;
    close(code?: number, reason?: string): void;
    on(event: string, listener: (...args: any[]) => void): this;
    once(event: string, listener: (...args: any[]) => void): this;
    off(event: string, listener: (...args: any[]) => void): this;
    removeAllListeners(event?: string): this;
    private emit;
}