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What’s Node.js

Node.js is a cross-platform runtime environment and library for running JavaScript applications outside the browser. It is used for creating server-side and networking web applications. It is open source and free to use. It can be downloaded from this link https://nodejs.org/en/

Many of the basic modules of Node.js are written in JavaScript. Node.js is mostly used to run real-time server applications.

The definition given by its official documentation is as follows:

  • Node.js is a platform built on Chrome’s JavaScript runtime for easily building fast and scalable network applications. Node.js 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.?

  • Node.js also provides a rich library of various JavaScript modules to simplify the development of web applications

Features

Following is a list of some important features of Node.js that makes it the first choice of software architects.

  • Extremely fast: Node.js is built on Google Chrome’s V8 JavaScript Engine, so its library is very fast in code execution.
  • I/O is Asynchronous and Event Driven: All APIs of Node.js library are asynchronous i.e. non-blocking. So a Node.js based server never waits for an API to return data. The server moves to the next API after calling it and a notification mechanism of Events of Node.js helps the server to get a response from the previous API call. It is also a reason that it is very fast.
  • Single threaded: Node.js follows a single threaded model with event looping.
  • Highly Scalable: Node.js is highly scalable because event mechanism helps the server to respond in a non-blocking way.
  • No buffering: Node.js cuts down the overall processing time while uploading audio and video files. Node.js applications never buffer any data. These applications simply output the data in chunks.
  • Open source: Node.js has an open source community which has produced many excellent modules to add additional capabilities to Node.js applications.
  • License: Node.js is released under the MIT license.