React Hooks: useEffect vs useLayoutEffect

🚀 useEffect vs useLayoutEffect in React While building modern UIs with React, developers often use useEffect for handling side effects. However, there are situations where useLayoutEffect is the better choice. The key difference lies in when they execute during the rendering lifecycle 👇 🔹 useEffect → Runs AFTER paint Executes after the UI is rendered on the screen Does not block the browser rendering ✅ API calls ✅ Subscriptions ✅ Logging ✅ Async operations 👉 Ideal for most side effects and better performance 🔹 useLayoutEffect → Runs BEFORE paint Executes after DOM updates, but before the browser paints Blocks rendering until execution completes ✅ DOM measurements ✅ Layout calculations ✅ Preventing UI flickering 👉 Useful when visual consistency matters 📌 Rule of Thumb ✔ Use useEffect for most side effects ✔ Use useLayoutEffect when your logic depends on DOM layout 🧠 Key Takeaway Both hooks may look similar, but their timing directly impacts performance and UI behavior Understanding this difference helps in building more stable and visually consistent applications #ReactJS #Frontend #WebDevelopment #JavaScript #Programming #Developers #Coding #LearningInPublic #ReactHooks

When I first learned React, I thought #useEffect and #useLayoutEffect were basically the same. They are not. The key difference is when they run in the rendering cycle. Many React developers confuse useEffect and useLayoutEffect — but the difference can impact both performance and user experience. 🔹 useEffect Runs after the browser paints Non-blocking Perfect for: API calls, logging, timers, updating document title 🔹 useLayoutEffect ->Runs before the browser paints -> Blocks rendering until finished Best for: DOM measurements, layout changes, preventing UI flicker, animations Simple rule to remember: Use useEffect by default Use useLayoutEffect only when you must read or modify DOM layout before paint Understanding this difference helps you write more performant and smoother React applications. #React #FrontendDevelopment #MERN_STACK #WebDevelopment #JavaScript #ReactJS #Programming #SoftwareEngineering

If you're using React.js and still confusing useEffect with useLayoutEffect, here’s the simplest way to understand it: 🔹 useEffect() Runs after the browser paints the screen. ✅ Best for: API calls Event listeners Timers Logging Fetching data useEffect(() => { console.log("Runs after paint"); }, []); 🔹 useLayoutEffect() Runs before the browser paints the screen. ✅ Best for: Measuring DOM size/position Preventing UI flicker Synchronous DOM updates Animations/layout fixes useLayoutEffect(() => { console.log("Runs before paint"); }, []); 💡 Simple Rule: Use useEffect for most side effects Use useLayoutEffect only when layout or visual rendering matters ⚡ Quick Difference: useEffect → async after render useLayoutEffect → sync before paint Using the wrong one can lead to: unnecessary blocking layout shift flickering UI performance issues 🚀 React developers: If your UI jumps, flickers, or measures incorrectly… You probably need useLayoutEffect, not useEffect. #ReactJS #JavaScript #FrontendDevelopment #WebDevelopment #ReactHooks #useEffect #laravel #laravedeveloper #useLayoutEffect #Programming #SoftwareDevelopment #UIDevelopment

A visual guide on React component useEffect lifecycle. How components mount and re-render in React and their relation with the useEffect hook is one of the most important concepts in React. To summarize, 1. When first-time components are inserted in the DOM, they're referred to as "mounted," then updated via rendering, and later "unmounted." 2. While mounting, a component initializes. 3. In the render stage, a virtual DOM gets created and compared, and in the commit stage, it gets painted to the browser. 4. Any effect gets executed during the commit. If the state changes, the component re-renders with vDOM creation during rendering, painting, and attaching to real DOM during the commit phase. Would you be interested in learning React/JavaScript with visuals and to-the-point explanations of how things work under the hood? I do a deep dive into foundational concepts & how things work under the hood. You can consider connecting with or following me, Ali Raza, to get along with the journey. Thanks. #react #javascript #frontend

🚀 Mini Project of the Day: Password Strength Checker First, I show how it works: • Checks password strength • Animated strength bar • Show / Hide password button Then, you can see the code being written in **30x speed** (HTML + CSS + JS). Goal: to improve my frontend skills and create clean, interactive UI components. #frontend #javascript #webdevelopment #vuejs #coding #juniordeveloper #uiux #learntocode #portfolio

After building my Student Task Tracker, here’s what I learned 👇 • Real-time DOM manipulation and how UI updates instantly • The importance of clean UI and good user experience • Handling user input and edge cases effectively • Basics of state management in frontend development • How small improvements can significantly enhance a product Building projects is the best way to truly understand development 💻 Looking forward to building more and improving every day 🚀 #WebDevelopment #JavaScript #React #Frontend #LearningJourney

From building basic static pages to creating interactive 3D experiences with Next.js, Three.js, and Framer Motion A challenging but rewarding learning step. #WebDevelopment #FrontendDevelopment #ThreeJS #NextJS #FramerMotion #JavaScript #UIUX #WebDesign #SoftwareDevelopment #Coding

Every new React project starts the same way: Hours setting up a component library. Wrestling with theming. Inconsistent spacing. No dark mode. No animation system. I got tired of it. So I built Unified UI. 🎨 → 75 production-ready, accessible components → One source of truth for every design token → Tailwind CSS v4 + Radix UI + Framer Motion — all wired together → Full TypeScript support with exported types for everything → Interactive documentation portal with live component previews → CLI starters for Next.js, Vite React, Vue, and Laravel It's not just a component library. It's a complete design infrastructure — tokens → theme → primitives → components → motion → utilities — all in a layered architecture that actually scales. The best part? It's 100% open source. MIT licensed. Built for the community. 🔗 GitHub: https://lnkd.in/db7yxVMz 🌐 Docs: https://lnkd.in/d4qKy38p If this saves you even one afternoon of setup time, drop a ⭐ on GitHub — it means the world to an indie open-source builder. Would love your feedback, ideas, and contributions! 💬 #ReactJS #OpenSource #DesignSystem #TailwindCSS #NextJS #TypeScript #FrontendDev #UILibrary #WebDevelopment #IndieHacker

#WebDevlopmentBootcamp #Day_93 React.js • Tailwind CSS • DaisyUI • JavaScript (ES6+) • React Toastify ✨ Highlights: • Dynamic product listing & cart system • Add/remove functionality with real-time updates • Toast notifications for better user experience • Clean UI based on Figma design • Fully responsive across all devices This project strengthened my skills in React state management, component-based architecture, and responsive UI design. Live link: https://lnkd.in/gV44NTiQ Programming Hero #WebDevelopment #CodingBootcamp #HTML #CSS #javaScript #NextJs #tailwindCss #React #Git #GitHub #LearningInPublic #BuildInPublic #SoftwareEngineering #TechJourney #JuniorDeveloper