export declare class ReconnectingEventSource {
    private _eventSource;
    private _lastEventId;
    private _timer;
    private _listeners;
    private _configuration;
    readyState: number;
    retryTime: number;
    retryCount: number;
    maxRetryAttempt: number;
    url: string;
    CLOSED: number;
    CONNECTING: number;
    OPEN: number;
    _onevent_wrapped: (event: any) => void;
    constructor(url: string, configuration?: any);
    _start(): void;
    _onopen(event: MessageEvent): void;
    _onerror(event: MessageEvent): void;
    _onevent(event: MessageEvent): void;
    onopen(event: MessageEvent): void;
    onerror(event: MessageEvent): void;
    onmessage(event: MessageEvent): void;
    onreconnect(): void;
    close(): void;
    addEventListener(type: string, listener: EventListenerOrEventListenerObject | null, options?: boolean | AddEventListenerOptions): void;
    removeEventListener(type: string, listener?: EventListenerOrEventListenerObject | null, options?: EventListenerOptions | boolean): void;
}