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:${port}`))$ npm install express --no-save
Express is a minimal and flexible Node.js web
application framework that provides a robust set
of features for web and mobile applications.const express = require('express')const app = express() app.get('/', function (req, res) { res.send('Hello World')}) app.listen(3000)const express = require('express');
const app = express();
const port = 3000;
app.get('/', (req, res) => {
res.send('Hello World!')
});
app.listen(port, () => {
console.log(`App listening at http://localhost:${port}`)
});$ npm install express