리액트 useReducer사용법

🎯 useReducer사용법 const [, ] = useReducer(, , ) import ReactDOM from 'react-dom'; import './index.css'; import * as serviceWorker from './serviceWorker'; import React, { useReducer } from 'react' // count의 초기 state를 0으로 설정하세요. const initialState = { count: 0, }; function reducer(state, action) { switch (action.type) { case 'increment': return {count: state.count + 1}; case 'decrement': return {cou..