Node.js

What Is Node.js?

Node.js is an event-based, non-blocking, asynchronous I/O runtime that uses Google’s V8 JavaScript engine and libuv library.

• Node.js is an open source server environment
• Node.js is free
• Node.js runs on various platforms (Windows, Linux, Unix, Mac OS X, etc.)
• Node.js uses JavaScript on the server

Node Is Built on Google Chrome’s V8 JavaScript Engine

How Do I Install Node.js?

npm i node.js Once you have downloaded and installed Node.js on your computer, let’s try to display “Hello World” in a web browser.

Getting Started

var http = require('http');

http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/html'});
  res.end('Hello World!');
}).listen(8080);

Include Modules

var http = require('http');

Now your application has access to the HTTP module, and is able to create a server:

http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/html'});
  res.end('Hello World!');
}).listen(8080);

Installing a Package Locally

npm init -y

JavaScript is everywhere, and Node is a vast and expansive subject. Nonetheless, I hope that in this article I’ve offered you the beginner-friendly, high-level look at Node.js and its main paradigms that I promised at the beginning. I also hope that when you re-read the definitions we looked at previously, things will make a lot more sense.