如何在React中监听页面url的变化？

npm install react-router-dom

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

const Home = () => <h1>Home</h1>;
const About = () => <h1>About</h1>;

const App = () => (
  <Router>
    <div>
      <ul>
        <li>
          <Link to="/">Home</Link>
        </li>
        <li>
          <Link to="/about">About</Link>
        </li>
      </ul>

      <hr />

      <Route exact path="/" component={Home} />
      <Route path="/about" component={About} />
    </div>
  </Router>
);

export default App;

import React, { Component } from 'react';
import { withRouter } from 'react-router-dom';

class MyComponent extends Component {
  componentDidUpdate(prevProps) {
    if (this.props.location !== prevProps.location) {
      // URL发生变化，执行相应的操作
    }
  }

  render() {
    return <h1>My Component</h1>;
  }
}

export default withRouter(MyComponent);