Convert Async to Callback with util.callbackify

Day 3 – Node.js Synchronous vs Asynchronous Today’s topic: Understanding execution flow in Node.js. Node.js supports both synchronous and asynchronous operations. Synchronous • Executes line by line • Blocks the next operation until the current task finishes • Not efficient for I/O-heavy operations Asynchronous • Non-blocking execution • Registers the task and continues • Uses callbacks, promises, async/await • Efficient for I/O operations Node.js is powerful because it uses asynchronous non-blocking I/O by default. Next: Callbacks, Promises and async/await with practical examples. #NodeJS #BackendDevelopment #JavaScript #AsyncProgramming #SoftwareEngineering

Day 5 – Node.js Understanding Promises Today’s topic: Promises in Node.js. Promises are used to handle asynchronous operations in a structured way and avoid callback nesting. A Promise has three states: • Pending • Fulfilled (Resolved) • Rejected .then() is used for success handling. .catch() is used for error handling. Promises make asynchronous code more readable and maintainable compared to callbacks. Next: async/await – a cleaner way to write asynchronous code. #NodeJS #BackendDevelopment #JavaScript #AsyncProgramming #SoftwareEngineering

Ever struggled with messy import paths using baseUrl hacks? 🤔 TypeScript 6 introduces subpath imports - a web standard approach that replaces clunky baseUrl configurations with cleaner, more maintainable import statements. The Problem: Traditional baseUrl requires complex path mappings and can break tooling. The Solution: Subpath imports follow Node.js specification for cleaner, tooling-friendly imports. Key Benefits: → Aligns with web standards → Replaces deprecated baseUrl → Works across build tools → Cleaner, more readable imports → Better IDE support What's your favorite TypeScript 6 feature so far? 💬 #TypeScript #TypeScript6 #WebStandards #JavaScript #DeveloperTips

JavaScript is single-threaded, but asynchronous behavior is managed by the Event Loop. 👉 Execution Order: 1️⃣ Call Stack – Executes synchronous code 2️⃣ Microtask Queue – Promises (High Priority) 3️⃣ Macrotask Queue – setTimeout, setInterval, DOM events (Low Priority) The Event Loop processes all microtasks before executing the next macrotask. That’s why Promise callbacks run before setTimeout — even with 0ms delay. Understanding this mechanism is crucial for writing efficient and non-blocking JavaScript applications. #JavaScript #EventLoop #AsyncJS #FrontendDeveloper #WebDevelopment 🚀

Memoization is a powerful tool but misusing it creates: • Extra memory usage • More dependency comparisons • Harder debugging • Zero real performance gains Optimization without profiling is just assumption. Use React DevTools. Find the real bottleneck. Fix what actually matters. For more information contact : https://lnkd.in/gNan5xMQ #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #ReactDeveloper #SoftwareEngineering #PerformanceOptimization #CleanCode #FrontendEngineer #TechLeadership #ProgrammingTips

Quick Idea : Understand the Core Concept One of the most powerful features in TypeScript is Generics. A generic lets you pass a type like a parameter. 👉 T is a placeholder for any type. Instead of writing separate functions for string, number, or other types, generics allow us to write flexible, reusable, and type-safe code. 💡 Why this matters: *Avoids code duplication *Improves type safety *Makes your functions reusable *Keeps your code scalable Understanding generics is a big step toward writing clean and professional TypeScript code. More TypeScript quick ideas #TypeScript #WebDevelopment #FrontendDevelopment #JavaScript #SoftwareDevelopment #LearningInPublic

If you truly understand the Event Loop, you understand how JavaScript really works under the hood. Here’s what every developer should know 👇 🧠 Main Thread → Executes synchronous code (Call Stack) 📦 Heap → Stores objects in memory 📋 Event Queue → Holds async callbacks waiting to run ⚙️ Thread Pool (libuv) → Handles heavy I/O tasks 🔁 Event Loop → Continuously checks the stack & queue #EventLoop #JavaScript #NodeJS #AsyncProgramming #BackendDevelopment #FullStackDeveloper #WebDevelopment #CodingInterview #ProgrammingConcepts #TechLearning

Day 12 – Node.js Handling Routes Without Express Today I implemented basic routing using the built-in http module. By checking req.url, we can manually handle different routes and send appropriate responses. This helps understand how routing works internally before using frameworks like Express. Next: Understanding HTTP methods (GET, POST, etc.) #NodeJS #BackendDevelopment #JavaScript #WebServer #SoftwareEngineering

TypeScript doesn't make your code better. It just makes bad code fail faster. After migrating 3 projects from JavaScript to TypeScript, here's my controversial take: ❌ TypeScript won't fix: - Poor architecture - Bad API design - Terrible variable names - Lack of testing - Spaghetti code ✅ TypeScript helps with: - Catching runtime errors at compile time - Self-documenting code (types as docs) - Better IDE autocomplete - Refactoring confidence - Team collaboration The Trap vs. The Reality 👇 Check the image below for the code comparison My rule: - Ban 'any' type (use 'unknown' instead) - Define interfaces for everything - Use strict mode ALWAYS - Type your environment variables TypeScript is a tool, not a solution. Write good code, then add types. Not the other way around. Agree or nah? 👇 #TypeScript #JavaScript #CodeQuality #HotTake

let's See how the #V8 engine executes JS code written inside #Node.js 🧩 JavaScript Ecosystem — A Common Misconception Many developers think Node.js = V8 Engine. But is that really true? 👉 Can a JavaScript engine behave differently from ECMAScript? 👉 What critical components does Node.js add beyond V8? 💡 Understanding this difference separates beginners from advanced developers. Let’s discuss 👇 ! #JavaScript #NodeJS #V8Engine #BackendDevelopment #SoftwareEngineering #WebDevelopment #TechCommunity