What is NodeJS used for in 2023?

is NodeJS used for?

With the increasing adoption of NodeJS, businesses are now taking advantage of its powerful capabilities. Built on Chrome's V8 JavaScript engine, it is an open-source, cross-platform JavaScript runtime environment that allows developers to build network applications efficiently. In this article, we’ll cover everything about NodeJS, starting from its definition, how it works, applications, features, use cases, and much more.

Whether you are a beginner or an experienced programmer, this guide will help you understand what NodeJS is used for and its benefits. Let's dive in!

What is NodeJS?

is NodeJS used for?, is NodeJS?

NodeJS is a server-side platform that executes JavaScript code outside a web browser. It is a runtime environment that offers a non-blocking, event-driven architecture, providing faster performance than traditional programming languages. NodeJS enables developers to build network applications, web servers, and command-line utilities using JavaScript.

NodeJS Architecture and How It Works

NodeJS architecture consists of the following elements:

  • Event Loop: It monitors the “event queue” for new events such as incoming requests and processes them.
  • Libuv: A C library that offers I/O functionality to JavaScript programs.
  • V8 Engine: A JavaScript engine that speeds up execution and improves performance.
  • Callbacks: They enable NodeJS applications to be asynchronous.

When a request comes to the server, NodeJS handles it in the following manner:

  • Takes a request.
  • Makes a thread from the thread pool to process that request.
  • Does all the processing in a non-blocking way.
  • Upon completion, the result is returned.
  • Sends back the response to the client.

Features of NodeJS

NodeJS has the following features:

  • Non-Blocking I/O: It enables concurrent processing of multiple requests.
  • Event-Driven Architecture: It processes events asynchronously, allowing efficient execution of applications.
  • Server-Side Development: It runs on the server side, helping developers to create powerful web applications.
  • Cross-Platform Compatibility: It runs on virtually any operating system, regardless of the architecture.
  • Scalability: NodeJS can handle a large number of requests simultaneously and can scale horizontally.

Applications of NodeJS

1. Web Development

NodeJS is popular in web development because it enables developers to create scalable and high-performance applications. It works great for real-time data applications because it allows bi-directional communication between server and client.

One of the most popular web frameworks built on NodeJS is Express. ExpressJS allows developers to create robust APIs with minimal code.

NodeJS also works well with frontend libraries such as React and Angular. Using NodeJS with these libraries simplifies the development process and allows for faster application builds.

2. Single-page Applications (SPAs)

NodeJS is also suitable for building single-page applications because it allows developers to execute JavaScript code server-side and thereby fetch dynamic content efficiently.

3. Chat Applications

NodeJS simplifies the creation of chat applications by facilitating real-time communication between users.

4. Internet of Things

NodeJS is ideal for building IoT devices because it can run on low-powered devices. It also enables developers to delver data quickly, which is critical for IoT devices.

Is NodeJS a Programming language?

No, NodeJS is not a programming language. It is a runtime environment that enables developers to execute JavaScript code server-side. JavaScript is the scripting language used for NodeJS.

Is NodeJS Frontend or Backend?

While JavaScript is mostly used for front-end development, NodeJS is specifically designed for server-side development. It helps developers to build robust web applications and APIs.

Getting Started with NodeJS

is NodeJS used for?,Getting Started with NodeJS

How to Install NodeJS

To install NodeJS, follow the steps below:

  1. Go to the official NodeJS website and download the installer based on the operating system.
  2. Run the installer and complete the installation steps.

Check the version of NodeJS Installed

To check the version of NodeJS installed in your system, type the command below in the terminal:

node -v

What is NPM?

NPM (Node Package Manager) is used to manage the dependencies of NodeJS applications. It is used to install, configure and manage NodeJS packages.

Hello World in NodeJS

To start with NodeJS, let's create a simple program that prints "Hello World". Create a file called "app.js" and add the code below:

console.log("Hello World");

Simply run the code above using the command below in the terminal:

node app.js

Creating Server using Express

As mentioned earlier, Express is a popular web framework for NodeJS. To create an Express server, ensure that you have NodeJS and NPM installed. Then follow the steps below:

  1. In your terminal, create a folder called "express_server."
  2. Navigate to the "express_server" folder and initialize NPM by running the command below:
npm init
  1. Install Express by running the command:
npm install express --save
  1. Create a file called "server.js" and copy the code below:
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 https://locallhost.com/:${port}`))
  1. Start the server by running the command:
node server.js

Now, go to https://locallhost.com/:3000 in your browser, and you will see the message, "Hello World!"

Quick Tips and Facts

  • NodeJS is an excellent option for microservices architecture.
  • NodeJS applications use less RAM and CPU.
  • Netflix, LinkedIn, and PayPal are some of the popular companies that use NodeJS.


Is NodeJS used for frontend or backend?

NodeJS is used for server-side development, which is the backend.

What are the best uses for NodeJS?

NodeJS is best for use cases that require real-time data exchange, scalability, and high-performance applications.

What is Node.js?

Node.js is an open-source, cross-platform, server-side JavaScript runtime environment that allows developers to build network applications, web servers, and command-line utilities using JavaScript.

What is Node.js used for?

Node.js is used for server-side development and is suitable for building scalable, high-performance real-time applications.


In conclusion, NodeJS is an excellent tool for modern developers and businesses. We hope this guide has provided valuable insights into what NodeJS is used for, its features, and its capabilities. NodeJS is relatively easy to learn and provides excellent performance for web applications. We encourage you to try it out!



Jacob is a software engineer with over 2 decades of experience in the field. His experience ranges from working in fortune 500 retailers, to software startups as diverse as the the medical or gaming industries. He has full stack experience and has even developed a number of successful mobile apps and games.

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