import { Signal } from "@angular/core";
import { HttpQuery, QueryKey, QueryOptions } from "./types";
/**
 * Creates a reactive signal-backed HTTP query whose cache identity follows a
 * `Signal<QueryKey | undefined>`. Automatically fetches when a new serialized
 * key becomes active (synchronously on construction, then via effect-scheduled
 * transitions). When the signal is `undefined`, the query is inactive — no cache
 * identity, no fetch.
 *
 * Must be called synchronously within an Angular injection context.
 */
export declare function createReactiveQuery<T>(key: Signal<QueryKey | undefined>, options?: Omit<QueryOptions, "method">, fetchFn?: typeof fetch): HttpQuery<T>;