import type { ClientRouter, Fetcher, FetcherState } from "@nifrajs/web";
/** Register (or clear) the router that owns fetchers - called by `mountRouter`. Not for app use. */
export declare function setMountedRouter(router: ClientRouter | undefined): void;
/** A fetcher's reactive {@link FetcherState} plus its imperative `load`/`submit`. */
export interface FetcherHandle extends FetcherState {
    /** Load a route path's loader data into this fetcher (concurrent; doesn't touch the active view). */
    readonly load: (path: string) => Promise<void>;
    /** Submit an action into this fetcher (concurrent); honors `X-Nifra-Revalidate`. */
    readonly submit: (action: string, body: NonNullable<RequestInit["body"]>) => Promise<void>;
}
/**
 * Subscribe to the independent fetcher for `key` (created lazily, stable across renders). Returns its
 * state (`pending`/`data`/`actionData`/`submission`) + `load`/`submit`. Multiple `useFetcher` calls
 * with different keys run concurrently without disturbing the active route or each other.
 */
export declare function useFetcher(key: string): FetcherHandle;
/**
 * Subscribe to the whole live fetcher collection - for a global busy view (e.g. "3 saving…"). Read
 * each entry's `.snapshot()` for its state. Re-renders whenever any fetcher transitions or a new one
 * is created.
 */
export declare function useFetchers(): readonly Fetcher[];
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