init express app code example

Example 1: sample express app

const express = require('express')
const app = express()
const port = 3000

app.get('/', (req, res) => res.send('Hello World!'))

app.listen(port, () => console.log(`Example app listening at http://localhost:${port}`))

Example 2: setup node js express basic setup

npm init -y
npm i express

Example 3: initialize express app

npx express-generator