express package in node js code example

Example 1: install express globally

$ npm install express --no-save

Example 2: install express

npm i express

Example 3: npm express

$ npm install express

Example 4: npm express

// npm install express
const express = require('express');
const app = express();

app.get('/', (req, res)=> {
  res.send('Hello World');
}) 

app.listen(3000,()=>{
 console.log("starting...");
});

Example 5: node.js express

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 6: what is express.js

Express is a minimal and flexible Node.js web application framework
that provides a robust set of features for web and mobile
applications.