type Listener = (...args: any[]) => void;
declare class BrowserWebSocket {
    private _ws;
    private _listeners;
    /** Matches ws.readyState constants */
    static readonly CONNECTING = 0;
    static readonly OPEN = 1;
    static readonly CLOSING = 2;
    static readonly CLOSED = 3;
    constructor(url: string);
    get readyState(): number;
    on(event: string, fn: Listener): this;
    send(data: string): void;
    close(code?: number, reason?: string): void;
    private _emit;
}
export default BrowserWebSocket;
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