1.新建文件夹
2.初始化项目，导入express
yarn init -y
yarn add express
3.在文件夹中新建server.js
const express = require(‘express‘) const app = express() app.get(‘/‘,function(req,res){ //响应路由 let responseObject={ name:‘qiuzhiqiuiu‘ } res.send(‘hello express‘) }) app.listen(3000,()=>console.log(‘app has running on prot 3000‘)) //在3000端口
4.导入nodemon
yarn global add nodemon
5.运行
nodemon server.js
原文：https://www.cnblogs.com/lxz-blogs/p/14046460.html