import React from 'react';
export type AsyncSetState<TState> = (stateUpdate: React.SetStateAction<TState>) => Promise<TState>;
/**
* A hook that mirrors `useState` in function and API, expect that setState
* calls return a promise that resolves after the state has been set (in an effect).
*
* This is _similar_ to the second callback in classy setState calls, but fires later.
*
* ```ts
* const [counter, setState] = useStateAsync(1);
*
* const handleIncrement = async () => {
* await setState(2);
* doWorkRequiringCurrentState()
* }
* ```
*
* @param initialState initialize with some state value same as `useState`
*/
export default function useStateAsync<TState>(initialState: TState | (() => TState)): [TState, AsyncSetState<TState>];