What is Node.js?

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Node.js is an open-source, cross-platform which uses Javascript as a programming language, that allows users to build web applications. Node.js plays a vital role in the web development industry.

Node.js offers an event-driven, non-blocking (asynchronous) I/O and cross-platform runtime environment for developing extremely scalable server-side JavaScript applications.

“Being a full stack developer does not limit you to the MEAN stack (MongoDB, Express.js, AngularJS, and Node.js). Node.js is the only requirement (there is no alternative in JavaScript for backend programming). The remaining technologies in this stack are optional and could be substituted with other tools that provide comparable functions.”

How Does Node.js work

  • Node.js turns your JavaScript code into quicker machine code.
  • Machine code is low-level code that a computer can execute without first interpreting it.
  • Node.js is built on Google Chrome’s V8 JavaScript Engine, so its library is very fast in code execution.

Why Node.js

  • Node.js is a free and open-source framework distributed under the MIT license.
  • The complete server-side program is built in JavaScript.
  • Because Node.js is based on Google Chrome’s V8 JavaScript Engine, the library executes code incredibly quickly.
  • Node.js operates on a single-thread, with event looping.
  • By default, Node.js is asynchronous. As a result, Node.js outperforms other frameworks.
  • The ease of establishing data transfer apps with JavaScript and the programming language familiarity within the company reduces development time and costs.
  • Javascript is used on the client-side, but Node.js allows it to be used on the server-side as well. This allows us to use the same language on both the server-side and the client-side.
  • Node.js uses javascript to write both server-side and client-side web applications, hence the person who knows node.js and javascript will become a full stack developer by knowing only one language.
  • The asynchronous event loop in Node.js for I/O operations makes it ideal for a cloud-based database system that receives requests from dozens of users who require data immediately.
  • The Node.js package manager(npm), works brilliantly with Docker to build a microservices architecture that lets each API, function, and application run seamlessly and independently.
  • A non-relational database is growing nowadays and the node has packages to handle those databases, even those databases are written in javascript.

What Node.js can Do

  • Node.js can generate dynamic page content and can create, open, read, write, remove, and close server-side files.
  • Node.js can interact with data.
  • Node.js can add, delete, and edit data in your database.

Uses of Node.js

Browser Games

  • The most intriguing application of the real-time web is undoubtedly browser-based games.
  • To play games, users no longer need to open a Flash, Java, or other software such as a Shockwave applet.
  • Rich and spectacular real-time browser games may be created using Node.js in conjunction with Socket.io and HTML5.
  • Other types of games, such as multiplayer games, can also be made.


  • Most people nowadays utilize phone-based apps or social media sites to communicate with their pals.
  • Chat rooms may be readily created with Node.js. Independent chat rooms are probably not very popular on today’s Internet, but they are frequently utilized in online games, which become more enjoyable when they include a chat component.


  • Video and audio media content files are uploaded to streaming video sites like YouTube and Facebook and then processed so that they may be viewed or heard by people all over the world.
  • After these files have been uploaded, they will be processed.
  • These videos can be handled as they are being uploaded using Node.js applications.
  • This saves a lot of time and makes media sharing much easier.

Real Time-applications

  • Node.js is an excellent choice for applications that process a large number of brief messages and have a low latency requirement.
  • Node.js makes it simple to create such systems.
  • Node.js is also a viable option for real-time collaborative drawing and editing applications. Trello and DropBox are two examples.

Queued Input

  • Node.js applications can support several database connections at the same time.
  • Even while under tremendous pressure, the system maintains its responsiveness, which is extremely important.


  • When processing large amounts of IO-bound requests, Node.js comes in handy.
  • Node.js won’t be efficient if a large number of CPU processing requests are necessary to fulfill the request.
  • If it’s basically about shifting data around, then node.js will be quite efficient.
  • Node.js is a lightweight alternative to the more traditional huge and complex frameworks.
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