React -嵌套路由-获取当前URL的深度

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

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

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

const Home = () => {
  const location = useLocation();
  const depth = location.pathname.split('/').filter((path) => path !== '').length;

  return (
    <div>
      <h2>Home</h2>
      <p>Current URL depth: {depth}</p>
    </div>
  );
};

const About = () => {
  const location = useLocation();
  const depth = location.pathname.split('/').filter((path) => path !== '').length;

  return (
    <div>
      <h2>About</h2>
      <p>Current URL depth: {depth}</p>
    </div>
  );
};

const Contact = () => {
  const location = useLocation();
  const depth = location.pathname.split('/').filter((path) => path !== '').length;

  return (
    <div>
      <h2>Contact</h2>
      <p>Current URL depth: {depth}</p>
    </div>
  );
};

export default App;