Importance of Node.js in JavaScript

What is Node.js?

Node.js is a JavaScript runtime environment which is used to execute the JavaScript code outside the browser. It can be used on different operating system like windows, Mac OS, Linux. Node.js is used to build server-side web applications which can respond fast and handle multiple connections parallelly.

Why Node.js?

JavaScript was created for the purpose of using it in web browsers. Node.js has enabled developers to use JavaScript for full-stack development. It allows developers to write both the client-side and server-side code in the same language and create web applications, command-line interface tools and other software. Using Node.js developer can run code as a standalone application.

Node.js is having single-threaded event loop architecture. It supports concurrency using the concept of events and callbacks and it abstracts the input and output requests. Means, it plays vital role in the execution of asynchronous operations. It initializes the event loop at the beginning, controls the order of operation and process the input. You can check this article for more detailed information about event loop concepts of Node.js.

In addition, Node.js is also known for its scalability, flexibility, and performance. It is built on Google's V8 engine which compile JavaScript code into machine code which results in faster and more efficient execution. This allows Node.js to handle large amounts of data and concurrent operations without slowing down. It uses the asynchronous operation which does not use a separate thread for each process instead, it uses an event-driven input/output method.

Node.js is considered as the best web framework for the beginner as it can work in the best way for real-time application development as Node.JS allow JavaScript to run in the browser everywhere whether it is frontend or backend.

Reasons to Use Node.js

NPM Ecosystem

It has a rich ecosystem in terms of open-source tool and libraries. it has more than 1.5 million packages available which makes it easy to build and maintain large and complex web applications.

Fast and Scalable

Node.js uses an event driven non-blocking I/O technique. Which makes it lightweight and efficient which allow it to handle large number of operations.

JavaScript Everywhere

Node.js uses JavaScript on both the front-end and back-end, making it easy for developers to work in a single language across the entire stack.

Easy to Learn

As JavaScript is a popular language which many developers already know. So, it makes Node.js easy to get started with server-side development.


Node.js is a cross-platform framework which can be run on Windows, macOS, and Linux. Multiplatform support makes It a versatile choice for building server-side applications.

Real-time Applications

Node.js is considered as ideal for the creation of real-time web applications like chat, streaming services, gaming platforms. All these requires low-latency and high-performance servers.

Microservices Architecture

Node.js is considered as a first choice for creating microservices-based architectures, allowing developers to build small, focused vices that can be easily scaled and deployed independently.

High-performance APIs

Node.js is used to build APIs which support large volume of API requests with low latency rate by making it a popular choice for building backend services for web and mobile applications.

Large Community

Node.js has a large community of developers with plenty of resources, documentation, forums, meetups and support.


Node.js is a very cost-effective choice for the server-side development as it is free and open-source. it can run on any hardware which reduce the overall cost of development and deployment.

Overall, Node.js plays very crucial role in the server-side development. It has ability to extend JavaScript language outside the browser. It allows developers to create scalable server-side applications with their familiar languages.

Updated on: 14-Apr-2023


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