27 lines
844 B
TypeScript
27 lines
844 B
TypeScript
import { useCallback, useRef } from '../lib/teact/teact';
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import useForceUpdate from './useForceUpdate';
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export type ReducerAction<Actions> = { type: Actions; payload?: any };
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export type StateReducer<State, Actions> = (state: State, action: ReducerAction<Actions>) => State;
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export type Dispatch<Actions> = (action: ReducerAction<Actions>) => void;
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export default function useReducer<State, Actions>(
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reducer: StateReducer<State, Actions>,
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initialState: State,
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) {
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const forceUpdate = useForceUpdate();
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const reducerRef = useRef(reducer);
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const state = useRef(initialState);
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const dispatch = useCallback((action: ReducerAction<Actions>) => {
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state.current = reducerRef.current(state.current, action);
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forceUpdate();
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}, [forceUpdate]);
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return [
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state.current,
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dispatch,
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] as [State, Dispatch<Actions>];
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}
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