export interface EventSourceOptions {
    init?: EventSourceInit;
    event?: string;
    enabled?: boolean;
}
export type EventSourceMap = Map<string, {
    count: number;
    source: EventSource;
}>;
export declare const EventSourceProvider: import("react").Provider<EventSourceMap>;
/**
 * Subscribe to an event source and return the latest event.
 * @param url The URL of the event source to connect to
 * @param options The options to pass to the EventSource constructor
 * @returns The last event received from the server
 */
export declare function useEventSource(url: string | URL, { event, init, enabled }?: EventSourceOptions): string | null;