what is node.js

node.js is a free open source server environment, a JavaScript runtime environment for developing server-side and web applications.

Node.js is an open source cross-platform runtime environment for developing server-side and web applications. Node.js applications are written in JavaScript and run on various platforms (Windows, Linux, Unix, Mac OS X, etc.).

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

What are the advantages of Node.js?

The following are some of the advantages of Node.js.

Asynchronous and event-driven

All APIs of the Node.js library are asynchronous, that is, non-blocking. It essentially means that a Node.js based server never waits for the API to return data. The server moves to the next API after calling it and the notification mechanism of Node.js events helps the server to get the response from the previous API call.

Single-threaded but highly scalable

Node.js uses a single-threaded model with an event loop. The event mechanism helps the server respond in a non-blocking manner and makes the server highly scalable, whereas traditional servers create limited threads to handle requests. Node.js uses a single-threaded program, and the same program can serve more requests than traditional servers such as Apache HTTP Server.

Very fast

Based on Google Chrome’s V8 JavaScript engine, the code execution speed of the Node.js library is very fast.

No buffering

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

What can Node.js do?

●Node.js can generate dynamic page content

●Node.js can create, open, read, write, delete and close files on the server

●Node.js can collect form data

●Node.js can add, delete, and modify data in the database

Where to use Node. js?

● I/O bound applications

● Data streaming applications

● Data-intensive real-time applications (DIRT)

　● Application based on JSON API

● Single-page application

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