What is Node.js?

Node.js is a platform built on Chrome’s JavaScript runtime for easily building fast and scalable network applications. It uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.

Key Features of Node.js

  • Asynchronous and Event Driven: All APIs of Node.js library are asynchronous, that is, non-blocking. It essentially means a Node.js based server never waits for an API to return data.
  • Single Threaded but Highly Scalable: Node.js uses a single threaded model with event looping. This approach helps the server to respond in a non-blocking way and makes the server highly scalable.
  • No Buffering: Node.js applications never buffer any data. These applications simply output the data in chunks.

Why Use Node.js?

Node.js is widely adopted for developing server-side and networking applications because of its efficiency and event-driven architecture. It facilitates the development of scalable network programs such as web servers, making it a go-to technology for many web developers and administrators.

How to Install Node.js

Node.js can be installed from the official Node.js website. The installation package comes with the npm (node package manager) which helps in installing libraries and managing project dependencies.

Steps to Install Node.js:

  1. Download the Node.js installation package from the official website.
  2. Open the installation package and follow the instructions to install Node.js and npm.
  3. Verify the installation by opening a command prompt and typing ‘node -v’. This should display the installed version of Node.js.


In conclusion, Node.js is a powerful tool for developing efficient, scalable network applications. Its asynchronous, event-driven architecture makes it a popular choice for web developers and administrators. As a web professional, understanding and using Node.js can significantly enhance your web development skills.

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