Express Framework

Node.js - Express Framework

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

Features of Express framework :

• Allows to dynamically render HTML Pages based on passing arguments to templates.
• Defines a routing table which is used to perform different actions based on HTTP Method and URL.
• Allows to set up middle-wares to respond to HTTP Requests.

To work with Express first we have Install Express framework 

NPM so that it can be used to create a web application using node terminal.
npm install express

We should install the following important modules along with express

1. Body parser

• This is a node.js middleware for handling JSON, Raw, Text and URL encoded form data
• npm install body-parser

2.Cookie parser

• Parse Cookie header and populate req.cookies with an object keyed by the cookie names
• npm install cookie-parser

3.Multer

• This is a node.js middleware for handling multipart/form-data.
• npm install multer

How we use express in our files is, we have to call that

var express = require('express');

var app = express();

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

var server = app.listen(8081, function () {

var host = server.address().address 

var port = server.address().port

console.log("Example app listening at http://%s:%s", host, port) })

If we save the above code in a file named server.js and run it with the command of node server.js we can have this output.

Example app listening at http://0.0.0.0:8081

For More & Tutorials visit : Node.js Express Framework