如何使用节点js定义路由？

const http = require('http');
const url = require('url');

http.createServer(function (req, res) {
  // 路由处理逻辑将在这里添加
}).listen(8080);

const server = http.createServer(function (req, res) {
  const parsedUrl = url.parse(req.url, true);
  const path = parsedUrl.pathname;

  if (path === '/home') {
    // 执行与'/home'路径相关的操作
    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.end('Welcome to the home page!');
  } else if (path === '/about') {
    // 执行与'/about'路径相关的操作
    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.end('About us');
  } else {
    // 处理未知路径的情况
    res.writeHead(404, {'Content-Type': 'text/plain'});
    res.end('Page not found');
  }
});

server.listen(8080, function () {
  console.log('Server is running on port 8080');
});