Node.js Event Loop Explained

Progress update: I’ve now started learning Express.js. After understanding JavaScript fundamentals and Node.js basics, Express finally made things click for me. Today I learned: 📌 What Express.js actually is (a minimal Node.js framework) 📌 How routing works (GET, POST, etc.) 📌 How servers respond to requests 📌 Why Express simplifies backend development The biggest realization? 👉 Backend development isn’t magic — it’s structured logic + practice. Seeing a server run on my own machine and respond to requests felt like a huge milestone. Next steps: 🔹 Build small APIs 🔹 Understand middleware 🔹 Connect Express with a database Sharing this to stay consistent and motivated. If you’ve worked with Express.js: 💬 What should a beginner focus on first? 💬 Any common mistakes to avoid? #ExpressJS #NodeJS #BackendDevelopment #JavaScript #LearningInPublic #WebDevelopment #DeveloperJourney #Consistency

Understanding the Node.js Workflow 🚀 From Client Request to Event Loop and Async Processing — this diagram helped me visualize how Node.js handles non-blocking operations efficiently. Always learning, always building. 💻 #NodeJS #JavaScript #BackendDevelopment #WebDevelopment #Learning

Just created an Express.js Cheat Sheet! A simple and practical reference guide to quickly understand and work with Express.js while building Node.js applications. 📌 Topics Covered: • Setup • Routing • Middleware Perfect for beginners learning backend development and developers who want a quick revision guide. live: (https://lnkd.in/djsg-mnF) Code smarter. Build faster. 💻✨ #ExpressJS #NodeJS #JavaScript #BackendDevelopment #WebDevelopment #Coding #CheatSheet

Day 6 – Node.js Understanding async/await Today’s topic: async/await in Node.js. async/await is built on top of Promises and makes asynchronous code easier to read and maintain. Instead of using .then() and .catch(), we can write asynchronous code that looks like synchronous code. Key points: • async makes a function return a Promise • await pauses execution until the Promise resolves • Error handling is done using try/catch • Avoids callback nesting async/await improves readability and structure in real-world backend applications. Next: Node.js Core Modules (fs, path, os) #NodeJS #BackendDevelopment #JavaScript #AsyncProgramming #SoftwareEngineering

🚀 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

Today's chai code class was about node js internals We learned a bit about how Node.js works behind the scenes, but it was a lot to grasp! 1. Event Loop: How Node.js handles tasks one by one 2. Async behavior: Lets apps run fast without getting stuck 3. Timers & callbacks: Basics of how things happen in order  I’ll be learning more and sharing a detailed post on Node.js internals soon! Thanks to our teacher Piyush Garg for guiding us through this complex topic! #NodeJS #JavaScript #LearningJourney #BackendDevelopment #TechLearning #chaicode Hitesh Choudhary Anirudh J.Akash Kadlag

🚀 I Finally Understood the Node.js Event Loop And it made Node.js make so much more sense. Most developers use Node.js daily. But very few understand what happens behind the scenes. Here are 3 things I learned today 👇 🔹 1. Node.js Uses libuv libuv powers the event loop and handles async tasks like: • File operations • Network requests • Timers This is why Node.js is non-blocking and scalable. 🔹 2. Before the Event Loop Starts Node.js first: • Initializes the environment • Executes top-level code • Loads modules (require / import) • Registers callbacks Only then does the event loop begin. 🔹 3. Event Loop Phases Once running, Node.js processes tasks in phases: 1️⃣ Timers 2️⃣ I/O callbacks 3️⃣ Polling 4️⃣ setImmediate 5️⃣ Close callbacks Understanding this helps write better async code. Big thanks to Hitesh Choudhary, Piyush Garg, Jay Kadlag for the amazing explanation. #NodeJS #JavaScript #BackendDevelopment #WebDevelopment

🚀 Day 3 of Learning Node.js Today's topic was Node.js Modules. What I learned: * What modules are * How to use require() * How to export functions from one file and use them in another This helps organize code better and make it reusable. Step by step moving deeper into backend development. #NodeJS #JavaScript #Coding #MERNStack Day 4 Post – Built-in Modules Writing

🚀 Getting Smart with Logs - A Practical Guide to Winston in Node.js Logging isn’t just console.log() anymore. In real-world applications, structured logging can make or break your debugging, monitoring, and production stability. In this guide, I’ve explored how to use Winston in Node.js to: ✅ Create structured logs ✅ Manage multiple log levels ✅ Store logs in files ✅ Handle errors effectively ✅ Improve production observability If you're building backend systems, understanding proper logging is not optional it’s foundational. Would love to know - what logging strategy are you using in your Node.js projects? 👇 #NodeJS #BackendDevelopment #JavaScript #Winston #WebDevelopment #FullStackDeveloper #SoftwareEngineering #CodingLife #Developers #Tech #SheryiansCodingSchool