在React Redux中路由更改时维护全局状态

npm install react-router-dom react-redux

import React from 'react';
import { Route, Switch } from 'react-router-dom';
import Home from './components/Home';
import About from './components/About';
import Contact from './components/Contact';

const Routes = () => (
  <Switch>
    <Route exact path="/" component={Home} />
    <Route path="/about" component={About} />
    <Route path="/contact" component={Contact} />
  </Switch>
);

export default Routes;

import { LOCATION_CHANGE } from 'react-router-redux';

const initialState = {
  location: null
};

const routerReducer = (state = initialState, action) => {
  switch (action.type) {
    case LOCATION_CHANGE:
      return {
        ...state,
        location: action.payload
      };
    default:
      return state;
  }
};

export default routerReducer;

import React from 'react';
import ReactDOM from 'react-dom';
import { Provider } from 'react-redux';
import { ConnectedRouter } from 'react-router-redux';
import { createBrowserHistory } from 'history';
import { createStore, combineReducers } from 'redux';
import Routes from './routes';
import routerReducer from './routerReducer';

const history = createBrowserHistory();
const rootReducer = combineReducers({
  router: routerReducer
});
const store = createStore(rootReducer);

ReactDOM.render(
  <Provider store={store}>
    <ConnectedRouter history={history}>
      <Routes />
    </ConnectedRouter>
  </Provider>,
  document.getElementById('root')
);

import React from 'react';
import { connect } from 'react-redux';

const App = (props) => {
  const { location } = props.router;
  
  // 在这里可以使用location来根据路由更改做一些全局状态的操作
  
  return (
    <div>
      {/* 组件的内容 */}
    </div>
  );
};

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

export default connect(mapStateToProps)(App);