Day 22 of #100DaysOfCode — Node.js Fundamentals + Understanding NPM

JavaScript started as a language meant only for the browser . Browsers run JavaScript using a built-in engine that understands and executes the code. But what if you want to run JavaScript outside the browser ? That’s where Node.js comes in. Node.js takes the same engine used inside Chrome — Google’s V8 engine — and places it on your computer or server. This lets you run JavaScript without a browser , making it possible to build APIs, servers, CLIs, scripts, and backend applications. ⭐ What Even Is Node.js? Think of it like this: Browser = JavaScript + UI (DOM, buttons, windows) Node.js = JavaScript + System Access (files, servers, databases, networks) ⚙️ How Node.js Executes JavaScript (Simple Breakdown) When you run: node app.js This is what actually happens: 1️⃣ Node reads your JavaScript file It loads the code into memory. 2️⃣ V8 compiles your JavaScript V8 converts JS → optimized machine code → runs on your CPU. 3️⃣ Node’s Event Loop starts This is what makes Node powerful. Instea