使用react导航复制顶部标题

npm install react react-router-dom

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

const TopNavigation = () => {
  return (
    <nav>
      <ul>
        <li>
          <Link to="/">首页</Link>
        </li>
        <li>
          <Link to="/about">关于</Link>
        </li>
        <li>
          <Link to="/contact">联系我们</Link>
        </li>
      </ul>
    </nav>
  );
};

const Home = () => {
  return <h2>首页</h2>;
};

const About = () => {
  return <h2>关于</h2>;
};

const Contact = () => {
  return <h2>联系我们</h2>;
};

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

export default App;