import * as React from 'react';
import { Observable, Subscription } from 'rxjs';
/**
 * Represents a factory function that can return an effect cleanup function,
 * a Subscription, or an Observable
 */
export type SubscriptionFactory = React.EffectCallback | (() => Subscription) | (() => Observable<any>);
/**
 * A function that returns a Subscription
 */
export type SubscriptionMaker = () => Subscription;
/**
 * Synonym for `useEffect(fn, [])`, but works with Subscriptions and Observbles.
 * Ties a resources to the lifetime of the component that invokes it.
 * Given a function which is either a useEffect-style callback, or returns an Observable or Subscription,
 * runs/subscribes to sit at component mount time, and runs the cleanup callback/unsubscribes at unmount time.
 */
export declare function useWhileMounted(sourceFactory: SubscriptionFactory): void;
/**
 * Synonym for `useEffect(fn, [])`, but works with Subscriptions and Observbles.
 * An alias for `useWhileMounted`.
 */
export declare function useWhenMounted(sourceFactory: SubscriptionFactory): void;
/**
 * Synonym for `useEffect(fn, [])`, but works with Subscriptions and Observbles.
 * An alias for `useWhileMounted`.
 */
export declare function useAtMountTime(sourceFactory: SubscriptionFactory): void;
/**
 * Ties multiple subscriptions to the lifetime of the component that calls useAllWhileMounted.
 * Given spread args of subscription-returning functions, gets the subscriptions from each
 * subscription factory at component mount time, and unsubscribes them all at unmount time.
 */
export declare function useAllWhileMounted(...subFactories: SubscriptionMaker[]): void;
/** Initiates a subscription (for listening) on the first render, and shuts it down on unmount.
 * Allows parents to hear events from their children's renders and mounts.
 * @description React renders parent-to-child, but mounts child-to-parent,
 * so for a parent to hear a child's mount event, the parent must start listening before
 * it renders the children - that's what useWhileRendered is for.
 * @example `useWhileRendered(() => bus.listen(CHILD_EVENT.match, log))`
 */
export declare function useWhileRendered(listenerMaker: SubscriptionMaker): void;
/**
 * Executes a callback function when the component unmounts.
 * Useful for cleanup operations that need to run only at unmount time.
 *
 * @example
 * ```
 * useAtUnmount(() => {
 *   analytics.trackComponentClosed();
 *   return saveUserState();
 * });
 * ```
 */
export declare function useAtUnmount(unmountCallback: () => void): void;