Node.js Practical Implementation: Building a Simple Server

Just Published: Understanding Node.js Internals & Event Loop While learning backend development, I realized that many developers use Node.js daily but don’t always understand how it actually works internally. So I decided to dive deeper and write a detailed article explaining the Node.js execution flow and event loop from the ground up. In this article, I explored: 🔹 Why Node.js was created 🔹 The difference between JavaScript and the Node.js runtime environment 🔹 Node.js architecture (V8, Node APIs, libuv, Event Loop) 🔹 How Node.js executes code step-by-step 🔹 Event loop phases and what happens inside each phase 🔹 Microtasks in Node.js (process.nextTick vs Promise queue) 🔹 Execution flow with real code examples and dry runs I also added visual diagrams to make concepts like the event loop and execution flow easier to understand. Writing this helped me solidify my understanding of how asynchronous JavaScript works behind the scenes. If you're learning backend development with Node.js or want to understand how JavaScript handles concurrency, this might help. 📖 Read the full article here: https://lnkd.in/gDiCQKZn Thanks to the amazing community at Chai Aur Code that constantly shares knowledge and motivates learners to go deeper into concepts. and thanks to the amazing mentors like Hitesh Choudhary Sir, Piyush Garg Sir, and Akash Kadlag #nodejs #javascript #backenddevelopment #webdevelopment #eventloop #asyncjavascript #programming #learninginpublic

Learning Moments from Today I was revisiting JavaScript concepts when the cohort suddenly moved into TypeScript. For a moment it felt overwhelming, jumping into types, configuration, and a slightly different way of writing JavaScript. But that’s also where the fun started. On the very first day I: • Created a simple Node.js web server • Explored how dependencies work in a project • Walked through package.json and the node_modules structure • Looked at the dependency tree to understand how packages connect behind the scenes Sometimes learning feels overwhelming at the beginning, especially when moving into something new like TypeScript. But once you start exploring the ecosystem and understanding how things actually work under the hood, it becomes exciting. Today reminded me that development is not just about writing code, it’s also about understanding the tools, packages, and systems that power modern applications. Small steps. Better understanding. Continuous learning. #JavaScript #TypeScript #NodeJS #WebDevelopment #Developers #chaicode #cohort #revisit

I’ve noticed something about debugging. Most bugs aren’t hard problems. They’re rushed thinking. When I started building features with React and Node.js, my first instinct was always to start coding immediately. Open the editor. Write code. Fix it later. But a lot of the time the bug was already baked into the first version. Now I pause before writing anything. Just a few minutes to think about: - what the feature actually needs to do   - how the data should flow   - where the edge cases might appear  That small pause saves me far more time than jumping straight into code. Typing fast doesn’t make you a faster developer. Clear thinking does. 👨💻 Do you usually sketch the solution first, or figure things out while coding? #WebDevelopment #JavaScript #ReactJS #FullStack #LearnInPublic #SoftwareDevelopment

🚀 Day 2 – Understanding Modules in Node.js Continuing my backend learning journey with the Namaste Node.js series. Today I completed Episode 02–04, focusing on how Node.js organizes code using modules. Key takeaways: • Node.js follows a modular architecture, allowing us to split code into smaller reusable pieces. • Every file in Node.js is treated as a separate module. • Using module.exports, we can expose functions, objects, or variables from one module. • Using require(), we can import and use those exported modules in another file. • This approach helps in maintaining clean, scalable, and reusable codebases. As someone who works heavily with modular architectures in React applications, it’s interesting to see how similar concepts apply on the backend as well. Understanding these fundamentals is an important step toward becoming a strong Full-Stack Engineer. Looking forward to diving deeper into Node.js internals next. #NodeJS #BackendDevelopment #JavaScript #FullStackJourney #SoftwareEngineering #LearningInPublic

𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗦𝘁𝗮𝗿𝘁𝗲𝗱-𝗗𝗶𝘃𝗶𝗻𝗴 𝗗𝗲𝗲𝗽𝗲𝗿 𝗶𝗻𝘁𝗼 𝗡𝗼𝗱𝗲.𝗷𝘀 𝗜𝗻𝘁𝗲𝗿𝗻𝗮𝗹𝘀 Today’s class was all about understanding what actually happens behind the scenes in Node.js. Instead of just writing code, we explored how Node.js manages asynchronous operations and achieves high performance. We discussed how 𝗟𝗶𝗯𝗨𝗩 plays a major role in Node.js by handling low-level operations like file system tasks, networking, and asynchronous I/O. It was interesting to learn how Node.js relies on this library to manage tasks efficiently. Another key concept we covered was the 𝗘𝘃𝗲𝗻𝘁 𝗟𝗼𝗼𝗽-the core mechanism that allows Node.js to handle multiple operations without blocking the main thread. Understanding its phases and how callbacks move through the loop really helped clarify how asynchronous JavaScript works in practice. We also looked at 𝗧𝗵𝗿𝗲𝗮𝗱 𝗣𝗼𝗼𝗹𝗶𝗻𝗴, and how certain operations that cannot be handled directly by the event loop are delegated to worker threads in the background. This explains how Node.js maintains performance even when dealing with heavier tasks. Finally, we explored 𝘀𝗲𝘁𝗜𝗺𝗺𝗲𝗱𝗶𝗮𝘁𝗲(), and how it schedules callbacks to run in a specific phase of the event loop, giving better control over execution timing in asynchronous code. Learning these internals gives a completely different perspective on Node.js development. Instead of just using the tools, it feels great to understand how they actually work under the hood. And got an assignment to read an article to find what 𝗽𝗿𝗼𝗰𝗲𝘀𝘀.𝗻𝗲𝘅𝘁𝗧𝗶𝗰𝗸( ) do? Thanks to Piyush Garg sir and mentors Hitesh Choudhary Akash Kadlag Suraj Kumar Jha for this insightful class and for explaining these concepts so clearly. Looking forward to exploring more deep concepts in backend development. 🚀 #ChaiCode #NodeJS #BackendDevelopment #JavaScript #EventLoop #LearningInPublic #WebDevelopment

As a full stack developer, I recently started learning TypeScript. At first I thought it was just "JavaScript with types". But after exploring it a bit more, I started to realise why large projects prefer it so much. Here are a few things that stood out to me: - Type safety (obvious) It catches errors during development and helps you avoid them during runtime. - Better autocomplete and IDE support Initially it could be frustrating but when you start to understand how TypeScript works in the backend, you will start thanking TypeScript as the editor starts to actually understand your code - Interface and Type Aliases make code structure clearer Especially useful when working with APIs and large projects. - Easier refactoring Changing code in large codebases becomes safer without risking failure of services. It definitely adds a small learning curve, but I am beginning to see why modern frameworks like React, Angular and Next.js are heavily using it. Currently exploring: - Interfaces - Generics - Type inference #typescript #softwaredevelopment

🚀 Today’s backend class was intense… and honestly a little overwhelming by Piyush Garg & Hitesh Choudhary But those are usually the days we learn the most. Here are a few things that clicked for me today while working with TypeScript and Node.js 👇 🧠 Learning of the day ✅ Started my journey with TypeScript It adds types to JavaScript, making code safer and easier to maintain. 📦 package-lock.json matters It tracks the exact dependency tree, ensuring every developer installs the same package versions. 🧱 Backend project structure Setting up TypeScript properly makes backend projects cleaner and easier to scale. 📤 Named exports rule They are always imported using curly braces { }. 📝 DT = Type Definitions They describe the types for libraries written in JavaScript. ⬇️ Useful command npm i @types/<package-name> -D This installs TypeScript type definitions for a package. Every time I learn something new in JavaScript/TypeScript, I realize how deep the ecosystem really is. #JavaScript #TypeScript #WebDevelopment #BackendDevelopment #LearnInPublic

Day 5/21: Entering the World of Backend & Node.js 🌐 Today marks Day 5 of my 21-day learning challenge, and it’s a big one—I’ve officially started my journey into Backend Development. The Shift to Server-Side: After focusing on the browser, today was about understanding how JavaScript lives outside of it. I dived deep into the core foundations of Node.js and the Express.js ecosystem. Key Backend Takeaways: Runtime Environments: Exploring how Node.js allows us to execute JavaScript directly on a server/machine. Package Management: Mastering npm for project initialization and dependency management. Server Architecture: Understanding the request-response cycle and building my first basic server with Express. Environment Efficiency: Setting up nodemon to streamline the development workflow. A Quick Refresh (Frontend): To keep my DOM manipulation skills sharp while diving into logic, I also built a smooth Mouse Follower using HTML, SCSS, and Vanilla JavaScript. It was a great way to "freshen up" on event listeners and CSS transitions before fully immersing myself in server-side code. One big realization today: The Backend isn't just about code; it's about communication. Learning how a server listens and responds is the first step toward building truly full-stack applications. Check out the screen recording below to see the mouse follower in action! 🖱️✨ Sheryians Coding School Mentor: Ankur Prajapati #SheryiansCodingSchool #Cohort2_0 #21DaysChallenge #NodeJS #ExpressJS #BackendDevelopment #WebDevelopment #Javascript #FullStackJourney

I Started Learning Node.js to Strengthen My Backend Skills Instead of jumping straight into frameworks, I focused on understanding how Node.js actually works. Here’s what I’ve covered so far: Core Foundations • How Node.js executes JavaScript outside the browser • Why there is no window or document object on the server • The difference between browser runtime and server runtime • Event-driven, non-blocking architecture fundamentals Modules & Code Organization • CommonJS module system • module.exports and require() • Named exports vs aggregated exports • Structuring code across multiple files Understanding this properly makes scaling projects easier later. Core Built-in Modules • fs → Reading and writing files • path → Handling cross-platform file paths • os → Accessing system-level information Instead of just using frameworks blindly, I wanted clarity on how backend logic interacts with the operating system. Why This Matters Many developers jump directly into Express or NestJS without understanding: How Node handles I/O How modules are resolved How the event loop behaves How blocking operations affect performance I’m focusing on fundamentals first. Because frameworks change. Core runtime understanding does not. Now here’s the uncomfortable question you should ask yourself next: Have you studied: The event loop phases? Microtasks vs macrotasks? Streams? Buffers? Async vs sync FS trade-offs? How Node handles concurrency internally? If not, you’re still at beginner level — and that’s fine. Just don’t confuse starting with mastering. #NodeJS #BackendDevelopment #JavaScript #FullStackDeveloper #SoftwareEngineering #LearningInPublic #Developers

🚀 Setting up a TypeScript + Node.js project the RIGHT way Most beginners just throw everything in one folder and push it all to GitHub. Here's how to do it properly from day one. 👇 Thanks to Piyush Garg and Hitesh Choudhary for teaching me this — their guidance made this click for me! 🙌 ━━━━━━━━━━━━━━━━━━━━ 📁 THE FOLDER STRUCTURE ━━━━━━━━━━━━━━━━━━━━ TypeScript can't run directly — it always compiles to JavaScript first. That means two separate folders: 📂 src/  → your TypeScript files 📂 dist/ → compiled JS files (never push this to GitHub!) ━━━━━━━━━━━━━━━━━━━━ ⚙️ THE SETUP (step by step) ━━━━━━━━━━━━━━━━━━━━ 1️⃣ Initialize the project npm init 2️⃣ Install TypeScript as a dev dependency npm i typescript -D (It's a build tool, not a runtime dependency — keep it in devDependencies) 3️⃣ Generate tsconfig.json tsc --init Then set: "rootDir": "./src" and "outDir": "./dist" 4️⃣ Set up .gitignore automatically npx gitignore node (No more accidentally pushing node_modules or dist/) 5️⃣ Compile & run tsc -p . node dist/index.js 6️⃣ Stop recompiling manually — add a watcher npm i tsc-watch -D Then add this to your package.json scripts: "dev": "tsc-watch --onSuccess \"node dist/index.js\"" npm run dev ✅ — now it auto-recompiles and restarts on every save. ━━━━━━━━━━━━━━━━━━━━ Small habits like this make your projects cleaner, your Git history saner, and your future self a lot happier. 🙌 Save this for your next TypeScript project! ♻️ #chaicode #TypeScript #NodeJS #WebDevelopment #Programming #100DaysOfCode #JavaScript #DevTips #SoftwareEngineering