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Node Js


Nodejs is a platform built on Chrome's JavaScript runtime for easily building fast and scalable network applications. Node. ... js is an open source, cross-platform runtime environment for developing server-side and networking applications.



What is Node.js?


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.

Node.js also provides a rich library of various JavaScript modules which simplifies the development of web applications using Node.js to a great extent.


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 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, 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 licence .

Where to Use Node.js?


Following are the areas where Node.js is proving itself as a perfect technology partner.

  • I/O bound Applications
  • Data Streaming Applications
  • Data Intensive Real-time Applications (DIRT)
  • JSON APIs based Applications
  • Single Page Applications


Where Not to Use Node.js?

It is not advisable to use Node.js for CPU intensive applications.


Following are some of the prominent highlights that make Node.js the first choice of software developers specially backend.


1. It is 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. 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.

2. Super Fast :

Being built on Google Chrome’s V8 JavaScript Engine, Node.js is super efficient and quick in code execution.

3. 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 like Apache which create limited threads to handle requests.

4. No Buffering :

Node.js applications never buffer any data. These applications simply output the data in chunks.

Because of above specifications some of the biggies like eBay, Paypal, Godaddy, General electronic , Yahoo etc.. relies on Node for their server side programming needs.