如何在不使用路由器的情况下，在React.js中点击按钮打开一个新页面？

npm install react-router-dom

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

const HomePage = () => (
  <div>
    <h1>Home Page</h1>
    <Link to="/newpage">
      <button>Open New Page</button>
    </Link>
  </div>
);

const NewPage = () => (
  <div>
    <h1>New Page</h1>
    <p>This is a new page.</p>
  </div>
);

const App = () => (
  <Router>
    <div>
      <Route exact path="/" component={HomePage} />
      <Route path="/newpage" component={NewPage} />
    </div>
  </Router>
);

export default App;

import React from 'react';
import ReactDOM from 'react-dom';
import App from './App';

ReactDOM.render(<App />, document.getElementById('root'));