import { ReactRef, StateHolder } from "./react-core-utils";
/**
 * Similar to [useState](https://reactjs.org/docs/hooks-reference.html#usestate) with some changes:
 * 1. Ensures that enclosing function component is mounted in order to update state.
 * 2. Returns an object instead of an array.
 *
 * @see https://reactjs.org/docs/hooks-reference.html#usestate
 * @param initialValue Make this the initial value for state.
 * @returns An object containing 2 items: the state, and a function that enables updating the
 * state if the component is not mounted.
 */
export declare const useStateSafely: <T>(initialValue: T) => StateHolder<T>;
/**
 * Runs an effect just once (onComponentDidMount) which sets the ref (that's returned) to true when
 * the component is mounted. And false when it isn't (hasn't been mounted yet, or has been
 * unmounted).
 */
export declare const useIsComponentMounted: () => ReactRef<boolean>;