What is NodeJS? JavaScript on the Server Explained

Introduction Hey there, fellow developers! If you've spent time building web applications, you've likely heard the buzz around NodeJS. If you still haven't, in my previous blog I have discussed about building your first basic NodeJS server from scratch with step-by-step guidance, you can refer here - Setting Up Your First Node.js Application. It's the technology powering everything big companies to countless startups' APIs. But what exactly is this Node.js, and why did it explode in popularity? In this blog, we'll explore Node.js from the ground up: its origins, how it shattered the "JavaScript is browser-only" barrier, its core architecture, and why it became a game-changer for backend development. Whether you're a frontend developer looking to go full-stack or a backend engineer exploring new tools, I guarantee you, you'll walk away with some extra information and you will start seeing things in different view. This post builds on foundational concepts. If you want deepe