React-Router和webpack-dev-server重新加载

npm install react-router-dom webpack-dev-server --save-dev

module.exports = {
  // ...
  devServer: {
    port: 3000, // 指定开发服务器的端口号
    proxy: {
      '/api': 'http://localhost:8080' // 配置代理，将/api开头的请求转发到后端服务器
    }
  },
  // ...
};

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

import Home from './components/Home';
import About from './components/About';

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

npx webpack-dev-server --mode development