1)Express is minimal node.js framework,higher level of abstraction.
2)Express contains robust set of features:complex routing,easier handling of request
and responses,middleware,server-side rendering etc.
3)express allows application into the MVC architecture.
//index.js
const express = require('express');
const app = express();
app.get('/', (req, res) => {
res.json({ msg: 'Hello from server' });
});
app.listen(4000, () => {
console.log('Hello from server');
});