what is node.js?

Node.js is an open-source and cross-platform JavaScript runtime server environment. Node.js runs on various platforms (Windows, Linux, Unix, Mac OS X, etc.) Node.js uses JavaScript library on the server.

NodeJs is used for creating server-side web applications (backend).

Node.js files saved with extension ".js"

Node.js is mostly used to run real-time server applications.

Node.js uses asynchronous programming.

Node.js runs the V8 JavaScript engine, the core of Google Chrome.

Node.js is based on the JavaScript framework, but it is used for developing server-based web applications.

Node.js = Runtime Environment + JavaScript Library

What Can Node.js Do?

Node.js can generate dynamic web 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, modify data in your database

A Node.js app runs in a single process, without creating a new thread for every request. Node.js provides a set of asynchronous I/O primitives in its standard library that prevent JavaScript code from blocking and generally, libraries in Node.js are written using non-blocking paradigms, making blocking behavior the exception rather than the norm.

Advantages of Node.js

File Name :

Node.js is an open-source framework

Node.Js Uses JavaScript to build entire server side application.

Asynchronous by default. So it performs faster than other frameworks

Cross-platform framework that runs on Windows, MAC or Linux

Lightweight framework that includes minimum modules. Other modules can be included as per the requirement of an application.

Feature of Node.Js

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 :Node.Js runs on the Google’s open-source scripting engine V8. so 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.

No Buffering :- Node.js applications never buffer any data.

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