Node.js

const http = require('http');//建立http请求

const hostname = '127.0.0.1';
const port = 3000;

//req:请求内容；res：响应内容
const server = http.createServer((req, res) => {//创建一个web服务器 res.statusCode = 200; res.setHeader('Content-Type', 'text/plain'); res.end('Hello World\n'); }); server.listen(port, hostname, () => {//服务器在3000端口监听请求 console.log(`Server running at http://${hostname}:${port}/`); });