Node.js is a very powerful JavaScript-based framework/platform built on Google Chrome's JavaScript V8 Engine. It is used to develop I/O intensive web applications like video streaming sites, single-page applications, and other web applications. Node.js is open source, completely free, and used by thousands of developers around the world.
Node js is one of the most popular project on github and every day its popularity is getting increased.
Features of Node.js
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.
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.
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
Installation
Download stable version form below site
https://nodejs.org/en/
For installation verification in windows or unix
open command prompt or shell
type node and press enter
it will give you forward arrow
type 1+2
it will print output as 3.
that means node is installed.
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