如何使用react-router v4提示

npm install react-router-dom

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

const Home = () => (
  <div>
    <h2>Home</h2>
  </div>
);

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

      <hr />

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

export default App;

const About = () => (
  <div>
    <h2>About</h2>
  </div>
);

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;