What is Node.js & Express.js - Basic Concepts Of Node js & Express js - WAY2IT

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What is Node.js & Express.js - Basic Concepts Of Node js & Express js


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.

Node.js is a very powerful JavaScript based framework/platform built on Google Chrome's JavaScript V8 Engine. It is used to delevop I/O intensive web applications like video streaming sites, single page applications and other web application. Node.js is open source, completely free, and used by thousands of developers around the world.

Defintion of Node.js as put by its official documentation is as follows : Node.js® is a platform built on Chrome's JavaScript runtime for easily building fast, 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.


Features of Node.js :

Following are few of the important features which are making Node.js as the first choice of software architects.
  • Aynchronous and Event Driven : All APIs of Node.js library are aynchronous that is non-blocking. It essentially means a Node.js based server never waits for a API to return data. Server moves to next API after calling it and a notification mechanism of Events of Node.js helps server to get 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 server to respond in a non-bloking ways and makes server highly scalable as opposed to traditional servers which create limited threads to handle requests. Node.js uses a single threaded program and same program can services much larger number of requests than traditional server 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

Why Node.js ?
  • Rapid innovation & delivery
  • Developer happiness
  • Attract & retain talent
  • Performance

Who else is using Node.js ?
  • Dow Jones (WSJ)
  • eBay
  • Groupon
  • LinkedIn
  • Rdio
  • Shutterstock
  • The New York Times
  • Uber
  • Yammer
  • Zendesk



What is Express.js :

Express is a minimal and flexible Node.js web application framework that provides a robust set of features for web and mobile applications, from expressjs.com.

We can develop single-page apps as well as multi-page applications using the ExpressJS framework. ExpressJS is designed for providing fundamental web application features, on top of NodeJS features.

ExpressJS is one of the most popular and widely used web frameworks in the Node.js development zone. ExpressJS allows you to handle Routes, Server and I/O stuff very easily.

ExpressJS provides a smooth transition for legacy websites to use Node.js as their middle layer. So, if you have a website running on Apache or Nginx, then without much change in source code you can convert them into super fast ExpressJS website.

ExpressJS can be downloaded using the NPM.


>> Click here to know more about installation instruction <<



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