Node.JS Online Training In India

Definition of 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.

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

Versions History of Node.JS :

1.Node.js v0.1.14 – 2011-08-26,
2.Node.js v0.1.15 – 2011-08-26,
3.Node.js v0.1.16 – 2011-08-26
4.io.js v1.0.0 – 2015-01-14,
5.io.js v2.0.0 – 2015-05-04,
6.io.js v3.0.0 – 2015-08-04,
7.Node.js v4.0.0 – 2015-09-08,
8.Node.js v5.0.0 – 2015-10-29,
9.Node.js v6.1.0 – 2016-05-05,
10.Node.js v7.0.0 – 2016-10-25,
11.Node.js v8.0.0 – 2017-05-30,
12.Node.js v8.5.0 – 2017-09-12.

Advantages of Node.js :

1. Asynchronous I/O :

It’s built to handle asynchronous I/O from the ground up and is a good match to a lot of common web- and network-development problems. In addition to fast JavaScript execution, the real magic behind Node.js is called the Event Loop. To scale to large volumes of clients, all I/O intensive operations in Node.js are performed asynchronously.

2. Javascript :

Node.js is Javascript. So the same language can be used on the backend and frontend. This means it breaks down the boundaries between front- and back-end development.

3. Community Driven :

In addition to it’s innate capabilities, Node.js has a thriving open source community which has produced many excellent modules to add additional capabilities to Node.js applications. One of the most famous is Socket.io, a module to manage persistent connections between client and server, enabling the server to push real-time updates to clients. Socket.io abstracts the technology used to maintain these connections away from the developer, automatically using the best technology available for a particular client (websockets if the browser supports it, JSONP or Ajax longpolling if not).

4. Node.js is fast :

Node.js uses JavaScript in the backend, and that’s enough to understand how fast the codes execute. Moreover, it runs on the Google’s V8 engine, which compiles the JavaScript directly into machine code making it faster than most.

5. The ever-growing NPM :

Being an open-source technology, node.js has a shared repository of good-to-go tools and modules. The number of modules in the Node Package Manager (NPM) has increased at a considerable pace, just on the verge of overtaking the RoR (Ruby on Rails) gems.

6. Real-time web apps :

The event-driven architecture of node.js is appropriate for real-time applications, especially chat applications and games. As both the client-side and the server-side are written in JavaScript, the synchronization process is better and quicker. Web socket protocol comes into picture here.

7. Productivity  :

The productivity of a web app increases several folds with node.js because a lot of time is saved in between the lines. Merging the front-end and back-end into a single entity makes it efficient. That also implies a lesser number of employees and more profit on your side. PayPal reported 2 times increase in developer productivity after using node.js.

8. Open Source :

Node.js is open source, so it’s free to use and no need to pay for license. There are also many open source modules supported by Node.js.

9. JavaScript as Programming Language :

It uses JavaScript as a programming language for both front-end and back-end which increase programmer productivity and code reusability.

10. Scalable :

You can scale your Node.js application by using two ways – Horizontal Scaling and Vertical Scaling, which helps you to improve your application performance. In Horizontal scaling you can add more nodes to your existing system. In Vertical scaling you can add more resources to a single node.

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