Typescript definitions for React hooks

react.d.ts

// Typescript definitions for React hooks
// Take with a grain of salt; these are a first attempt and I've only actually
// used a few so far :)

import { Context, RefObject } from 'react';

declare module 'react' {
  export function useState<T>(initialValue: T): [T, (newState: T) => void];
  export function useEffect(effect: Function, inputs?: Array<any>): void;
  export function useMutationEffect(effect: Function, inputs?: Array<any>): void;
  export function useLayoutEffect(effect: Function, inputs?: Array<any>): void;
  export function useContext<T>(context: Context<T>): any;
  export function useReducer<T>(
    reducer: (state: T, action: Object) => T,
    initialState: T,
    initialAction?: Object,
  ): [T, (action: Object) => void];
  export function useCallback(callback: Function, inputs: Array<any>): Function;
  export function useMemo<T>(memoized: Function, inputs: Array<any>): T;
  export function useRef<T>(initialValue?: any): RefObject<T>;
  export function useImperativeMethods<T>(
    ref: RefObject<T>,
    createInstance: () => Object,
    inputs?: Array<any>
  ): void;
}