JavaScript Event Loop Gotchas

Just published a deep dive into how V8 handles arrays under the hood 🚀 Key takeaway: not all arrays are equal. Packed arrays (SMI/Double) and TypedArrays are highly optimized, while holey and mixed arrays introduce hidden performance costs due to extra checks and de-optimizations. If you're writing performance-critical JavaScript, these low-level details *matter more than you think*. I’ve also included a benchmark to see the differences yourself 👇 https://lnkd.in/gsxGFNZv #JavaScript #V8 #Performance #NodeJS #Programming

A React component is a function which returns JSX. When you use that component inside another component, the React creates an element. <Ali /> refers to element of Ali component. So, when React sees <Ali /> it gets it's JSX and internally call React.createElement with details of Ali component such as props, key and children. React.createElement creates an object which is basically description of what needs to be rendered. Then React adds that to the virtual DOM and gets added to real DOM. Tried my best to simplify this concept. Thinking of writing a blog on it. You can subscribe to my newsletter to read in-depth. link in comment. #react #javascript #frontend #programming

Unlock the full power of dynamic imports in Node.js ESM! ⚡ Learn how to load modules on-demand, conditionally, and asynchronously with import(). Perfect for code splitting, lazy loading, reducing startup time, and building scalable, performance-optimized applications. #NodeJS #ESModules #DynamicImport #JavaScript #WebDevelopment #Programming #CodeSplitting #LazyLoading #PerformanceOptimization #BackendDevelopment #CodingTips #ModernJS

React feels fast because it usually updates only what changed. That is reconciliation. When state changes, React creates a new Virtual DOM tree, compares it with the previous one, finds the difference, and updates only the affected part of the real DOM. That is the reason React apps can stay efficient without you manually touching every DOM node. The infographic shows the full flow step by step, from state change to browser repaint. What React concept should I simplify next? #React #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #VirtualDOM #Programming #SoftwareEngineering 

💡 JavaScript Challenge function sum(a, b) { return a + b; } function sumCurried(a) { return function(b) { return a + b; }; } console.log(sum(5, 4)); console.log(sumCurried(5)(4)); ❓ What’s the output? Two different approaches… one result. But here’s the real question 👇 Are you more curious about the answer… or how both paths lead there? 👇 Drop your answer below! 🔗 Follow me for more insights on coding, creativity & branding. #JavaScript #WebDevelopment #CodingChallenge #Curiosity #Programming #Developers #LearnToCode

In this video, I explain when closures happen in JavaScript and how they allow functions to remember and access variables even after execution. A simple and clear breakdown of one of the most important JavaScript concepts. #JavaScript #Closure #Closures_Explained #Scope #Lexical_Scope #JS_Basics #Web_Development #Programming #Frontend #Backend

Just published a new blog post on NPM and Package Management It covers how npm helps manage dependencies, install libraries, and streamline development in Node.js projects. I’ve also explained key concepts and practical use cases to make package management easier to understand. If you're working with Node.js, this is a must know topic! Read more: https://lnkd.in/gxxfwhgB #NodeJS #NPM #JavaScript #WebDevelopment #Programming #SoftwareEngineering

Reverse engineering the module system:  How to use ES modules inside CommonJS in Node.js! 🔄 Perfect for maintaining legacy CJS codebases while adopting modern ESM packages. #NodeJS #ESModules #CommonJS #CJS #JavaScript #WebDevelopment #Programming #ModuleInterop #BackendDevelopment #CodingTips #DynamicImport #LegacyCode #ModernJS

Most React developers ignore this until their app starts crashing randomly. I recently debugged a frontend issue that didn’t show up in logs, didn’t throw errors… but quietly killed performance over time. Turned out — it was a memory leak in useEffect. Here’s the exact bug (and fix) #React #Frontend #JavaScript #WebDevelopment #MemoryLeaks #Coding #SoftwareEngineering #DevCommunity #CleanCode #Programming

💡 What is Ternary Operator in React? The ternary operator is used for conditional rendering in React. 👉 Syntax: condition ? trueValue : falseValue 📌 Example Use Cases: • Show / hide elements • Login / Logout button • Loading states • Toggle UI 📌 Why use it? • Cleaner than if-else • Inline rendering • Easy to read ⚡ Helps you write dynamic UI logic directly in JSX. Master this to build smart React interfaces. Follow TFSC for practical frontend learning. #reactjs #ternaryoperator #frontenddevelopment #javascript #webdevelopment #coding #learnreact #programming #tfsc