Node.js Tutorial

Node.js is a powerful, open-source, and cross-platform JavaScript runtime environment built on Chrome's V8 engine. It allows you to run JavaScript code outside the browser, making it ideal for building scalable server-side and networking applications.

• JavaScript was mainly used for frontend development earlier. With Node.js (Introduced in 2009), JavaScript became a backend language as well.
• Non-blocking, event-driven architecture for high performance.
• Supports the creation of REST APIs, real-time applications, and microservices.
• Comes with a rich library of modules through npm (Node Package Manager).
  

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To start with Node.js, you need to install and set it up on your machine. Follow these articles to install, depending on your system:

• How to Install Node.js on Windows?
• Installation of Node.js on Linux
• How to Install NodeJS on MacOS

Let us now take a look at our first code example.

// Import the http module
const http = require("http");

// Create a server
const server = http.createServer((req, res) => {
    res.statusCode = 200;
    res.setHeader("Content-Type", "text/plain");
    res.end("Welcome to the Node.js Tutorial");
});

// Listen on port 3000
server.listen(3000, () => {
    console.log(
        "Server is running on http://localhost:3000");
});

It will start a server, and when you visit http://localhost:3000, it will display

Welcome to the Node.js Tutorial

• The http module is imported to create a basic HTTP server.
• The createServer() method is used to handle incoming requests and send responses.
• The server listens on port 3000, and a message is displayed in the browser when accessed.

Why Learn Node.js

• It Enables the use of JavaScript for both frontend and backend development.
• It Supports building real-time applications like chat apps and gaming servers.
• It Provides high scalability for I/O-heavy applications.
• It Backed by a vibrant community and extensive library support

Introduction to Node.js

Prerequisites: JavaScript and basic knowledge of web development

Basics of Node.js

• Node.js Introduction
• Why Node.js?
• How Node.js Works?
• NPM (Node.jsPackage Manager)
• Installation of Node.js on Linux
• Installation of Node.js on Windows
• Basics
• First Application
• REPL
• modules
• Core modules
• Third Party modules
• Custom modules
• Blocking and Non-Blocking
• Callback Concept
• Debugging
• Set Console Font Color
• Web Server
• Create and Publish NPM packages
• Difference Between –save and –save-dev
• Event Loop
• Frameworks
• Promise Chaining
• This Binding
• Global Objects
• Automatic Restart Server with Nodemon
• Child Process
• Global Installation of Dependencies
• Session Variable

Node.js Complete References

• Assert
• Buffer
• Console
• Crypto
• DNS
• File System
• Globals Objects
• HTTP Module
• HTTP2
• OS
• Path Module
• Process
• Query String
• Stream
• String Decoder
• Timers Module
• TLS/SSL Module
• UDP/DataGram
• URL
• Utility
• V8
• VM Module
• Zlib

Also Check: Recent Articles on Node.js

Node.js Interview Questions

• Interview Questions and Answers – Beginner Level
• Interview Questions and Answers – Intermediate Level
• Interview Questions and Answers – Advanced Level

Node.js Online Quiz Questions

• Quiz | Set-1
• Quiz | Set-2
• Quiz | Set-3

Node.js Projects

• Library Management System
• User Management System
• Stock Market Portfolio App
• Chat App using socket.io
• Mail sender
• Task Manager
• Video Call App
• AI Whatsapp Bot
• Real Time News Aggregator

Careers with Node.js

Around 6 million websites use Node.js, it is growing day by day. Most of the eCommerce, and IoT companies looking for pro Node.js developer.

• Accenture
• Google
• Cognizant
• HCL Technologies
• Capgemini
• IBM India
• Microsoft India
• Amazon India
• Adobe Inc
• Oracle Inc
• Intel India
• Deloitte India
• Cisco Systems Inc

Node.js Advantages

• Easy Scalability: It compiles and executes JavaScript at lightning speeds, making it highly scalable.
• Real-time Web Apps: It enables real-time communication for chat, gaming, social media updates, and more.
• Microservices: It is lightweight and ideal for microservice architectures.
• JavaScript Everywhere: It Learn JavaScript once, and you can use it both for front-end and back-end development.
• Efficient Data Streaming: It efficiently handles I/O processes like media transcoding during uploads.
• Event-Driven Architecture: Unlike traditional servers, Node.js handles concurrent requests effectively.
• Strong Community Support: It has an independent community backing its development.

Node.js Jobs and Salary

If you are curious about what job profiles you will get after learning Node, then here in this section we have listed down some of the job profiles that any Node.js developer can easily get.

Node.js vs Other Backend Technologies