如何在React中使用可重用的导航栏更改每个页面的标题？

// Navbar.js

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

const Navbar = ({ title }) => {
  return (
    <div className="navbar">
      <ul>
        <li><Link to="/">Home</Link></li>
        <li><Link to="/about">About</Link></li>
        <li><Link to="/contact">Contact</Link></li>
      </ul>
      <h1>{title}</h1>
    </div>
  );
};

export default Navbar;

// App.js

import React from 'react';
import { BrowserRouter as Router, Switch, Route } from 'react-router-dom';
import Navbar from './Navbar';
import Home from './Home';
import About from './About';
import Contact from './Contact';

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

export default App;