import { type EventSourceMessage } from '@microsoft/fetch-event-source';
import { AnyObject, AnyFn } from '../../../../shared/types';
type SSEClientOptions = {
    headers?: Record<string, string>;
    method?: 'GET' | 'POST';
    withCredentials?: boolean;
    parseJSON?: boolean;
    abortOn?: (msg: EventSourceMessage) => boolean;
    onOpen?: (response: Response) => void;
    onError?: (error: unknown) => void;
    onClose?: () => void;
};
export declare class SseClient {
    private controller?;
    private connecting;
    private baseOptions;
    constructor(options?: SSEClientOptions);
    get active(): boolean;
    disconnect(): void;
    connect(url: string, params: AnyObject | undefined, onMessage: AnyFn<[unknown, EventSourceMessage], void>, options?: SSEClientOptions): Promise<void>;
}
export default SseClient;