React 中没有像 Vue 的 keep-alive 元素一样的内置功能，但可以通过其他方式实现类似的功能。在 Vue 中，keep-alive 元素可以缓存组件的状态，使得在组件切换时可以保留之前的状态，以提高性能和用户体验。在 React 中，我们可以使用其他技术和方法来达到相同的效果。

npm install react-router-dom redux react-redux

jsx
import React from 'react';
import { BrowserRouter as Router, Route, Switch } from 'react-router-dom';
import { Provider } from 'react-redux';
import { createStore } from 'redux';
import rootReducer from './reducers';
const store = createStore(rootReducer);
const App = () => {
  return (
    
      
        
          
          
          
        
      
    
  );
};
export default App;

jsx
import React from 'react';
import { connect } from 'react-redux';
const CachedComponent = ({ data }) => {
  return (
    
      
Cached Component
      
{data}
    
  );
};
const mapStateToProps = state => {
  return {
    data: state.data
  };
};
export default connect(mapStateToProps)(CachedComponent);

jsx
import React, { useState } from 'react';
import { connect } from 'react-redux';
import { Route, Switch, withRouter } from 'react-router-dom';
const CachedComponent = ({ data }) => {
  return (
    
      
Cached Component
      
{data}
    
  );
};
const mapStateToProps = state => {
  return {
    data: state.data
  };
};
export default connect(mapStateToProps)(CachedComponent);

jsx
componentDidUpdate(prevProps) {
  const { location } = this.props;
  if (prevProps.location !== location) {
    this.setState({ shouldCache: false });
  }
}

jsx
  
      path="/about"
    render={() => (
      
    )}
  />