Node.js: overview

Node.js: overview
Written by Nilima PaulDecember 7, 2021
11 min read
Nilima Paul

Technology Security Analyst

This lesson covers Node.js overview and its advantages and disadvantages.

What is Node.js?

Node.js is a server-side platform built on Google Chrome's JavaScript Engine (V8 Engine). Node.js was developed by Ryan Dahl in 2009 and its latest version is v0.10.36.

Node.js is an open-source, cross-platform runtime environment for developing server-side and networking applications. Node.js applications are written in JavaScript and can be run within the Node.js runtime on OS X, Microsoft Windows, and Linux.


Features of Node.js

Following are some of the important features that make Node.js the first choice of software architects.

  • Asynchronous and Event Driven − All APIs of the 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. 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.
  • Very Fast − Being built on Google Chrome's V8 JavaScript Engine, the Node.js library is very fast in code execution.
  • Single Threaded but Highly Scalable − Node.js uses a single threaded model with event looping. Event mechanism helps the server to respond in a non-blocking way and makes the server highly scalable as opposed to traditional servers which create limited threads to handle requests. Node.js uses a single threaded program and the same program can provide service to a much larger number of requests than traditional servers like Apache HTTP Server.
  • No Buffering − Node.js applications never buffer any data. These applications simply output the data in chunks.
  • License − Node.js is released under the MIT license.

Advantages of NodeJS

Here are the advantages of using Nodejs as server-side programming:

1. Easy to learn:

Most of the developers have a good grasp of JavaScript for it being one of the most popular programming languages.

For the developers who are already good in JavaScript find it easy to use Node.js at the backend. It is quite easy to learn Nodejs and it also consumes lesser time.

2. Supported widely by Google Chrome:

Search engine is empower by Node.js and it not only aids in the front end development but also has a great impact on the backend. Nodejs is supported by the Google V8 engine, which has the power to execute at the same time in the frontend using JavaScript.

Google lists Node.js as one of the fastest runtime system engine so that’s amazing. Also, with Nodejs it is easy to find mistakes in front end as well as backend.

3. Node.js offers easy scalability:

One of the key benefits offered by Nodejs is that it makes it easy for developers to scale the application in horizontal as well as vertical directions. The application can be scaled in a horizontal dimension by adding extra nodes to the current system.

Furthermore, Node.js also allows adding extra resources to the single node during the vertical scaling of the application. Hence, NodeJS is highly scalable and offers greater options than other JavaScript servers.

4. Full-stack JavaScript:

Node.js has regarded as a full-stack JavaScript for serving server-side applications as well as the client.

The benefit of using Nodejs is that you need not hire remote developers for front-end and back-end, which saves your valuable money and time.

5. Offer High Performance:

As mentioned earlier, Node.js interprets the JavaScript code through Google’s V8 JavaScript engine. The engine compiles JavaScript code directly into the machine code. Hence, it becomes easy to implement the code. Moreover, it can be done quickly and in an effective manner.

6. Single Programming Language:

With Node.js it becomes possible for developers to write the server-side application in JavaScript. This means that when you Hire Nodejs developers they can write both front-end and back-end applications in JavaScript using a runtime environment.

7. Large and Active Community:

Node.js have a large and active community of developers who keep on contributing towards the further improvement and development of this server-side JavaScript.

Developers working on Node.js have supported well by JavaScript programmers who provide them with easy and ready-made solutions and codes in GitHub.

8. The ability of Caching:

The open-source runtime environment of the Node.js provides the ability to cache a single module. The entire request for the first modules gets cache in the application memory.

9. Support for Commonly Used Tools:

With Node.js, developers receive extend support for various commonly used tools. If you want to test the source code of Node.js application, you can do it by using Jasmin and other such testing tools.

Similarly, if you want to install or identify the project dependencies, you can make use of npm, which is a powerful package manager.

10. Handles Requests Simultaneously:

Node.js provides the option of non-blocking I/O systems. It helps you to process several server requests simultaneously.

Node.js system can handle the concurrent requests better than Ruby or Python. The incoming requests get lined up and are addressing quickly and systematically.

Disadvantages of using Node.js

1. API is not stable:

One of the key problems that developers encounter while working on Node.js is the Application Programming Interface keeps on changing in frequent intervals and does not remain stable.

At times, you will see a new API with multiple backward-incompatible changes. As a result, developers are oblige to make changes in the accessible code bases to remain in tune with the latest version of Node.js API.

2. Library Support System is not strong:

Compared to other languages, JavaScript does not have a robust and well-equipped library system.

As a result, users are force to take support from the commonly available library for executing tasks, such as processing and handling database operations, Object-Relational Mapping, XML parsing, etc.

This makes it difficult for developers to implement common programming tasks using Node.js.

3. Asynchronous Programming Model:

If you want to boost the scalability of the application, the requirement is that the application should adopt an asynchronous programming model.

However, developers find this model to be more difficult as compared to linear blocking I/O programming.

Another disadvantage of the asynchronous programming model is that the code becomes clumsy, and programmers need to depend on the nested calls.


Node.js offers a lot more advantages to developers than its disadvantages. Moreover, it has extended the area of JavaScript applications and can be utilize for both frontend and backend servers.

With the progress of time, more and more business is adopting Node.js and has ended in getting positive results for their business. If you also want to develop application using NodeJS , you can consult us to hire senior NodeJS developers in India.

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Nilima Paul
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