【掰开揉碎】React Router——React应用导航（二）

// App.js
import React from 'react';
import { BrowserRouter as Router, Route, Redirect } from 'react-router-dom';
import Home from './Home';
import UserProfile from './UserProfile';
 
function App() {
  return (
    <Router>
      <Route path="/" exact component={Home} />
      <Route path="/user/:username" component={UserProfile} />
      <Redirect from="/old-path" to="/new-path" />
    </Router>
  );
}
 
export default App;

// App.js
import React from 'react';
import { BrowserRouter as Router, Route, Switch } from 'react-router-dom';
import Home from './Home';
import UserProfile from './UserProfile';
 
function App