npm i express@4 code example

Example 1: npm express

$ npm install express

Example 2: 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 3: 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.