import type { SSEEventMap, SSEEventType } from './types.js';
type EventCallback<T extends SSEEventType> = (data: SSEEventMap[T]) => void;
export declare class EventStream {
    private eventSource;
    private listeners;
    private callbackMap;
    private nativeListenerMap;
    private baseUrl;
    private cameraId?;
    private reconnectTimeout;
    constructor(baseUrl: string, cameraId?: string);
    connect(): void;
    on<T extends SSEEventType>(event: T, callback: EventCallback<T>): this;
    once<T extends SSEEventType>(event: T, callback: EventCallback<T>): this;
    off<T extends SSEEventType>(event: T, callback?: EventCallback<T>): this;
    close(): void;
    get connected(): boolean;
    private addNativeListener;
}
export {};
//# sourceMappingURL=EventStream.browser.d.ts.map