express 서버 사용해보기(nodemon error)

const express = require('express');

const app = express();


app.set('port', process.env.PORT || 3000);
app.get('/', (req, res) => {
    res.send('hello express');
});

app.post('/', (req, res) => {
    res.send('hello express');
});

app.get('/about', (req, res) => {
    res.send('hello express');
});

app.listen(3000, () => {
    console.log('익스프레스 서버 실행');
});

jaehyeonkwon@JaeHyeonui-MacBookPro express % nodemon app
[nodemon] 2.0.15
[nodemon] to restart at any time, enter `rs`
[nodemon] watching path(s): *.*
[nodemon] watching extensions: js,mjs,json
[nodemon] starting `node app.js`
node:events:368
      throw er; // Unhandled 'error' event
      ^

Error: listen EADDRINUSE: address already in use :::3000
    at Server.setupListenHandle [as _listen2] (node:net:1334:16)
    at listenInCluster (node:net:1382:12)
    at Server.listen (node:net:1469:7)
    at Function.listen (/Users/jaehyeonkwon/nodeAPI/express/node_modules/express/lib/application.js:618:24)
    at Object.<anonymous> (/Users/jaehyeonkwon/nodeAPI/express/app.js:19:5)
    at Module._compile (node:internal/modules/cjs/loader:1101:14)

 

 

 

 

해당 에러를 참고하였다.

https://stackoverflow.com/questions/4075287/node-express-eaddrinuse-address-already-in-use-kill-server

Node / Express: EADDRINUSE, Address already in use - Kill server

sudo lsof -i :3000
kill -9 {PID}