将redux状态保存到localstorage

import { createStore } from 'redux';
import { persistStore, persistReducer } from 'redux-persist';
import storage from 'redux-persist/lib/storage'; // defaults to localStorage for web

// 简单的 reducer
const initialState = { count: 0 };
function counterReducer(state = initialState, action) {
  switch (action.type) {
    case 'INCREMENT':
      return { ...state, count: state.count + 1 };
    default:
      return state;
  }
}

// 配置 redux-persist
const persistConfig = {
  key: 'root',
  storage,
};

const persistedReducer = persistReducer(persistConfig, counterReducer);

// 创建 store
const store = createStore(persistedReducer);
const persistor = persistStore(store);

export { store, persistor };

import React from 'react';
import ReactDOM from 'react-dom';
import { Provider } from 'react-redux';
import { PersistGate } from 'redux-persist/integration/react';
import { store, persistor } from './store';
import App from './App';

ReactDOM.render(
  <Provider store={store}>
    <PersistGate loading={null} persistor={persistor}>
      <App />
    </PersistGate>
  </Provider>,
  document.getElementById('root')
);