React Components and JSX Explained

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 

🔁 React hooks run in a specific order. Every single render. Most devs don't know this. And it causes bugs. 👇 On every render, this is the exact order: 1️⃣ Function body runs — useState, useRef, useContext initialize 2️⃣ useMemo and useCallback compute their values 3️⃣ React updates the DOM 4️⃣ useLayoutEffect fires — before the browser paints 5️⃣ Browser paints the screen 6️⃣ useEffect fires — after everything is visible On unmount: useLayoutEffect cleanup → useEffect cleanup → component gone The one thing worth memorizing: useLayoutEffect = before paint useEffect = after paint That single difference explains every flicker bug you've ever had. Did you know the exact order before this? 👇 #ReactJS #JavaScript #Frontend #WebDevelopment #Programming

🚀 Understanding React Reconciliation Many developers ignore how React updates the DOM. Here are some strategies that consistently work in production 👇 ⚡ 1. Know Virtual DOM Concept React compares previous and new UI efficiently. ⚡ 2. Use Stable Keys Helps React identify changes correctly. ⚡ 3. Avoid Unnecessary DOM Changes Keep structure stable. ⚡ 4. Minimize Tree Depth Shallow trees are faster to diff. ⚡ 5. Optimize Conditional Rendering Avoid frequent mount/unmount cycles. #React #programming #webdevelopment #reactjs  #coding #dailyUpdate #Developer 💻

💡 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

🚀 React Series - Day 10 Avoiding Unnecessary Re-renders with React.memo As applications grow, performance becomes more important. One common issue is unnecessary re-rendering of components. This is where React.memo helps. It is a higher-order component that memoizes a component - meaning it will only re-render if its props actually change. If the props remain the same, React skips rendering that component, improving performance. 👉 This is especially useful for components that: • Receive the same props frequently • Are part of large or complex UIs Used correctly, it can make applications faster and more efficient. #reactjs #javascript #frontenddeveloper #webdevelopment #codinginterview #learnreact #30daysofcode #programming #reactinterview #react #coding

3 React hooks you should use more often: 🔹 useMemo Caches expensive calculations. Recalculates only when dependencies change. 🔹 useCallback Caches a function reference. Prevents unnecessary re-renders in child components. 🔹 useReducer Better than useState for complex state logic. Think of it as a mini Redux. Most devs only use useState and useEffect. The ones above can make a real difference. 🎯 #ReactJS #Frontend #JavaScript #WebDev #Programming

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

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

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

Hey everyone ☺️ Going back to the basics and brushing up my React fundamentals. No matter how many advanced tools and libraries we learn, strong fundamentals always make the biggest difference. Right now, I’m revisiting these core topics: • JSX • Components • Props • State • useState • useEffect • Conditional Rendering • Lists with map • Event Handling I believe that when your fundamentals are strong, building scalable and clean applications becomes much easier. Advanced concepts feel less confusing when the foundation is clear. Sometimes, the best way to grow is not only by learning new things, but also by strengthening what we already know. #React #JavaScript #FrontendDevelopment #ReactJS #LearningJourney #Programming #SoftwareDevelopment #Coding #SoftwareDevelopment #LearningJourney