从Redux中导出值，使其成为全局

// store.js
import { createStore } from 'redux';

const initialState = {
  globalState: null,
};

function reducer(state = initialState, action) {
  switch (action.type) {
    case 'UPDATE_GLOBAL_STATE':
      return {
        ...state,
        globalState: action.payload,
      };
    default:
      return state;
  }
}

const store = createStore(reducer);

export default store;

// actions.js
export const updateGlobalState = (value) => ({
  type: 'UPDATE_GLOBAL_STATE',
  payload: value,
});

// MyComponent.js
import React from 'react';
import { connect } from 'react-redux';

const MyComponent = (props) => {
  // 使用globalState进行操作
  const { globalState } = props;

  return (
    <div>
      <p>Global State: {globalState}</p>
    </div>
  );
};

const mapStateToProps = (state) => ({
  globalState: state.globalState,
});

export default connect(mapStateToProps)(MyComponent);