将react路由器嵌套在另一个组件中，同时保留侧边栏

import React from 'react';
import { BrowserRouter as Router, Route } from 'react-router-dom';

import Sidebar from './Sidebar';
import Home from './Home';
import About from './About';
import Contact from './Contact';

const App = () => {
  return (
    <Router>
      <div>
        <Sidebar />
        <Route exact path="/" component={Home} />
        <Route path="/about" component={About} />
        <Route path="/contact" component={Contact} />
      </div>
    </Router>
  );
}

export default App;

import React from 'react';
import { Link } from 'react-router-dom';

const Sidebar = () => {
  return (
    <div>
      <ul>
        <li><Link to="/">Home</Link></li>
        <li><Link to="/about">About</Link></li>
        <li><Link to="/contact">Contact</Link></li>
      </ul>
    </div>
  );
}

export default Sidebar;

import React from 'react';

const Home = () => {
  return (
    <div>
      <h2>Home</h2>
      <p>Welcome to the home page!</p>
    </div>
  );
}

export default Home;

import React from 'react';

const About = () => {
  return (
    <div>
      <h2>About</h2>
      <p>About us...</p>
    </div>
  );
}

export default About;

import React from 'react';

const Contact = () => {
  return (
    <div>
      <h2>Contact</h2>
      <p>Contact us...</p>
    </div>
  );
}

export default Contact;

import React from 'react';
import ReactDOM from 'react-dom';

import App from './App';

ReactDOM.render(<App />, document.getElementById('root'));