React Perf Tip: Use User Deferred Rendering for Heavy UI

Race conditions are not just backend problems. They exist in your UI too. And they’re harder to notice. Here’s a real scenario 👇 User types fast in a search box: → Request A (slow) → Request B (fast) Response order: → B returns first → A returns later Now UI shows: ❌ Old data (A) instead of latest (B) No crash. Just wrong UI. Where this happens: ✖ Search inputs ✖ Filters ✖ Rapid navigation What works: ✔ Cancel previous requests (AbortController) ✔ Track latest request ID ✔ Use libraries that handle this (React Query) Key insight: UI correctness is not about rendering. It’s about timing. If you ignore race conditions… Your UI will lie to users. #ReactJS #Frontend #RaceCondition #JavaScript #SoftwareEngineering #Async #AdvancedReact #Engineering #WebDevelopment #Tech

New article in my Signals series: Signals in React: Separating UI Effects from Data Effects Signals aren't here to replace React, and React doesn't need to own every kind of side effect. In this post, I walk through practical examples to show: - why createEffect belongs to the data layer - why useEffect still belongs to UI/DOM work - how their cleanup timing differs - how the two can work together without conflict If you've ever felt unsure about where polling, timers, subscriptions, or cleanup logic should live, this article should help clarify the mental model. #react #signals #frontend #webdev #javascript #typescript #effect

🚀 𝗙𝗶𝘅𝗶𝗻𝗴 𝗦𝗹𝗼𝘄 𝗥𝗲𝗻𝗱𝗲𝗿𝗶𝗻𝗴 𝗶𝗻 𝗟𝗮𝗿𝗴𝗲 𝗥𝗲𝗮𝗰𝘁 𝗟𝗶𝘀𝘁𝘀 (𝗪𝗶𝘁𝗵𝗼𝘂𝘁 𝗢𝘃𝗲𝗿𝗰𝗼𝗺𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗻𝗴 𝗬𝗼𝘂𝗿 𝗖𝗼𝗱𝗲) Struggling with laggy UI when rendering large lists in React? You're not alone. The good news — you don’t need complex architectures to fix it. 💡 𝗛𝗲𝗿𝗲’𝘀 𝘄𝗵𝗮𝘁 𝗮𝗰𝘁𝘂𝗮𝗹𝗹𝘆 𝘄𝗼𝗿𝗸𝘀: • Use list virtualization (𝗿𝗲𝗮𝗰𝘁-𝘄𝗶𝗻𝗱𝗼𝘄 / 𝗿𝗲𝗮𝗰𝘁-𝘃𝗶𝗿𝘁𝘂𝗮𝗹𝗶𝘇𝗲𝗱) • Avoid unnecessary re-renders with memoization • Keep keys stable and meaningful • Break components into smaller, reusable pieces • Lazy load data when possible ⚡ 𝗦𝗺𝗮𝗹𝗹 𝗼𝗽𝘁𝗶𝗺𝗶𝘇𝗮𝘁𝗶𝗼𝗻𝘀 = 𝗕𝗶𝗴 𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝘄𝗶𝗻𝘀. Clean code. Faster UI. Better UX. #ReactJS #FrontendDevelopment #WebPerformance #JavaScript #UIUX #SoftwareEngineering #CleanCode #PerformanceOptimization

The "Future of Interfaces" just dropped. 🚀 Ex-React core dev Cheng Lou spent years "crawling through the depths of hell" to solve the web's oldest bottleneck: text measurement. Pretext (released 4 days ago) is a pure TypeScript algorithm that lets you layout entire pages without CSS or the DOM. 🔥 Bypass the DOM: Zero layout reflows and zero expensive DOM measurements. 🎯 Perfect Accuracy: Fast, comprehensive measurement for every language. 🏗️ Infrastructure Level: Render to Canvas, SVG, or Server-side with ease. 🤖 AI-Optimized: The foundational logic needed for next-gen agentic UIs. This isn't just a library—it’s the new foundation for high-performance UI engineering. GitHub: https://lnkd.in/dbxQpP4x #WebPerf #SoftwareEngineering #TypeScript #Innovation #Frontend #OpenSource

React forms are finally getting simpler. And that simplicity is more important than it looks. For years, handling forms in React meant juggling 'useState useEffect', manual submit handlers, and loading flags. Even a basic "save" action required boilerplate that mixed Ul with async orchestration. It worked-but components ended up doing too much. React 19 introduces a cleaner model with Actions. Instead of handling `onSubmit, preventing defaults, and managing loading state manually, you define an async function and attach it directly to the form. React takes care of the lifecycle-submission, pending state, and error handling. This shifts how we think about hooks and performance. We move from "managing side effects" to declaring intent. The component becomes easier to read, test, and maintain- because it focuses on *what happens*, not *how to manage it*. That said, this approach isn't for every case. Complex workflows, retries, or custom client-side control may still require traditional hooks. Here's how Im approaching it: VUse Actions for simple form submissions and mutations Reduce unnecessary 'useState' and 'useEffect usage Keep complex async flows isolated from Ul components Less boilerplate. More clarity. Better performance. Are you still managing form state manually, or starting to adopt this new model? #React19 #ReactJS #FrontendEngineering #WebDevelopment #AsvncProarammina #CleanCode #DeveloperExperience #ReactNative

💡 Day 8 — Dynamic Form Validator (JavaScript) Today, something shifted. I didn’t just build a form… I built logic that guides user behavior. This challenge pushed me beyond static UI into real interaction — the kind you see in login and signup systems every day. 🎯 What I built: A form with: • Name • Email • Password And implemented: ✨ Real-time validation using input events ✨ Error handling with dynamic feedback ✨ Regex-based email validation ✨ Password rules (minimum length) ✨ Controlled form submission (no invalid data allowed) 🧠 What I learned: At first, I thought validation was just “if/else”… But it’s more than that. It’s about: • Thinking in conditions • Structuring logic clearly • Connecting JavaScript with the DOM • Guiding users instead of reacting late One small bug (wrong condition in email validation) taught me something important: 👉 Most problems aren’t in logic… 👉 They’re in how things are connected. Fixing that felt like unlocking a new level. Try the Dynamic Form Validator here: https://lnkd.in/dFRuDVSc 🚀 Next step: Improving UX with disabled buttons, visual feedback, and stronger validation patterns. #JavaScript #FrontendDevelopment #WebDevelopment #CodingJourney #100DaysOfCode #LearningInPublic

ebsite has buttons… but do they actually respond? Clicks happen. Keys are pressed. Forms get submitted. But nothing meaningful happens. That’s where most beginners get stuck. Then the real problems start: No real interaction. Poor user experience. Static feel websites. Missed user actions. In 2026, JavaScript isn’t just about logic. It’s about reacting to user behavior in real time. Events help you: • Handle clicks, inputs, and actions • Trigger functions on user interaction • Build dynamic and responsive UI • Improve user engagement • Create real-world web experiences Because users don’t just see your website — they interact with it. So ask yourself — is your site listening to users? #JavaScript #WebDevelopment #FrontendDevelopment #Events #Coding #UIUX #DeveloperLife #LearnToCode

𝐑𝐞𝐚𝐜𝐭 𝐟𝐨𝐫𝐦𝐬 𝐣𝐮𝐬𝐭 𝐠𝐨𝐭 𝐚 𝐥𝐨𝐭 𝐜𝐥𝐞𝐚𝐧𝐞𝐫 𝐚𝐧𝐝 𝐢𝐭 𝐚𝐜𝐭𝐮𝐚𝐥𝐥𝐲 𝐦𝐚𝐭𝐭𝐞𝐫𝐬. For years, working with forms in React meant stitching together: 𝘶𝘴𝘦𝘚𝘵𝘢𝘵𝘦 for loading 𝘰𝘯𝘚𝘶𝘣𝘮𝘪𝘵 handlers 𝘱𝘳𝘦𝘷𝘦𝘯𝘵𝘋𝘦𝘧𝘢𝘶𝘭𝘵() Manual async control It worked… but let’s be honest: 👉 even simple forms felt heavier than they should. With React 19, the shift is clear: ➡️ Define an async action ➡️ Attach it to the form ➡️ React handles the rest No more micromanaging submission state. No more mixing UI with control logic. 𝐖𝐡𝐚𝐭 𝐜𝐡𝐚𝐧𝐠𝐞𝐬 𝐢𝐧 𝐩𝐫𝐚𝐜𝐭𝐢𝐜𝐞? ✔️ Less boilerplate in every component ✔️ Clear separation of 𝑼𝑰 vs 𝒍𝒐𝒈𝒊𝒄 ✔️ Built-in handling for pending + errors ✔️ Easier to read and maintain code The real upgrade isn’t shorter code. It’s clarity. We’re moving from: 𝘏𝘰𝘸 𝘥𝘰 𝘐 𝘩𝘢𝘯𝘥𝘭𝘦 𝘵𝘩𝘪𝘴? to: 𝘞𝘩𝘢𝘵 𝘴𝘩𝘰𝘶𝘭𝘥 𝘩𝘢𝘱𝘱𝘦𝘯? How I’d use it: ⦿Use Actions for straightforward form submissions ⦿Skip unnecessary useState / useEffect ⦿Keep complex workflows outside the UI layer This won’t replace every pattern but for most forms, it removes friction where it wasn’t needed in the first place. 𝐋𝐞𝐬𝐬 𝐧𝐨𝐢𝐬𝐞. 𝐌𝐨𝐫𝐞 𝐢𝐧𝐭𝐞𝐧𝐭. Are you sticking with manual form handling or testing this new approach already? 𝐋𝐞𝐭 𝐦𝐞 𝐤𝐧𝐨𝐰 𝐢𝐧 𝐭𝐡𝐞 𝐜𝐨𝐦𝐦𝐞𝐧𝐭𝐬. #React19 #ReactJS #FrontendEngineering #WebDevelopment #AsyncProgramming #CleanCode #DeveloperExperience #ReactNative #linkedingrowth

𝐇𝐨𝐰 𝐭𝐨 𝐎𝐩𝐭𝐢𝐦𝐢𝐳𝐞 𝐑𝐞𝐧𝐝𝐞𝐫𝐢𝐧𝐠 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐢𝐧 𝐭𝐡𝐞 𝐁𝐫𝐨𝐰𝐬𝐞𝐫 🚀 Many developers focus on 𝐀𝐏𝐈 𝐬𝐩𝐞𝐞𝐝 𝐨𝐫 𝐛𝐚𝐜𝐤𝐞𝐧𝐝 𝐨𝐩𝐭𝐢𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧, but forget one important thing — 𝐡𝐨𝐰 𝐟𝐚𝐬𝐭 𝐭𝐡𝐞 𝐛𝐫𝐨𝐰𝐬𝐞𝐫 𝐫𝐞𝐧𝐝𝐞𝐫𝐬 𝐭𝐡𝐞 𝐔𝐈. Even with a fast backend, poor rendering can make your app feel slow and laggy. 𝐇𝐞𝐫𝐞 𝐚𝐫𝐞 𝐬𝐨𝐦𝐞 𝐩𝐫𝐚𝐜𝐭𝐢𝐜𝐚𝐥 𝐰𝐚𝐲𝐬 𝐭𝐨 𝐨𝐩𝐭𝐢𝐦𝐢𝐳𝐞 𝐫𝐞𝐧𝐝𝐞𝐫𝐢𝐧𝐠 𝐩𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞: 🔹 𝟏. 𝐑𝐞𝐝𝐮𝐜𝐞 𝐃𝐎𝐌 𝐒𝐢𝐳𝐞 A large and deeply nested DOM increases the browser’s rendering work. Keep your HTML structure clean and minimal. 🔹 𝟐. 𝐀𝐯𝐨𝐢𝐝 𝐋𝐚𝐲𝐨𝐮𝐭 𝐓𝐡𝐫𝐚𝐬𝐡𝐢𝐧𝐠 Frequent DOM reads and writes force the browser to recalculate layout multiple times, which slows down rendering. 🔹 𝟑. 𝐔𝐬𝐞 𝐭𝐫𝐚𝐧𝐬𝐟𝐨𝐫𝐦 𝐚𝐧𝐝 𝐨𝐩𝐚𝐜𝐢𝐭𝐲 𝐟𝐨𝐫 𝐀𝐧𝐢𝐦𝐚𝐭𝐢𝐨𝐧𝐬 Properties like top, left, width, and height trigger layout recalculations. Instead, use transform and opacity, which are often GPU accelerated. 🔹 𝟒. 𝐋𝐚𝐳𝐲 𝐋𝐨𝐚𝐝 𝐑𝐞𝐬𝐨𝐮𝐫𝐜𝐞𝐬 Load images and components only when needed. Example: <𝐢𝐦𝐠 𝐥𝐨𝐚𝐝𝐢𝐧𝐠="𝐥𝐚𝐳𝐲" /> 🔹 𝟓. 𝐌𝐢𝐧𝐢𝐦𝐢𝐳𝐞 𝐑𝐞𝐟𝐥𝐨𝐰𝐬 𝐚𝐧𝐝 𝐑𝐞𝐩𝐚𝐢𝐧𝐭𝐬 Frequent UI changes can trigger expensive browser operations. Batch DOM updates when possible. 🔹 𝟔. 𝐔𝐬𝐞 𝐫𝐞𝐪𝐮𝐞𝐬𝐭𝐀𝐧𝐢𝐦𝐚𝐭𝐢𝐨𝐧𝐅𝐫𝐚𝐦𝐞 𝐟𝐨𝐫 𝐀𝐧𝐢𝐦𝐚𝐭𝐢𝐨𝐧𝐬 It synchronizes animations with the browser’s rendering cycle for smoother performance. 🔹 𝟕. 𝐕𝐢𝐫𝐭𝐮𝐚𝐥𝐢𝐳𝐞 𝐋𝐚𝐫𝐠𝐞 𝐋𝐢𝐬𝐭𝐬 If you render thousands of items in the DOM, the browser will struggle. Use list virtualization to render only visible elements. 💡 𝐒𝐢𝐦𝐩𝐥𝐞 𝐑𝐮𝐥𝐞: 𝐋𝐞𝐬𝐬 𝐃𝐎𝐌 + 𝐟𝐞𝐰𝐞𝐫 𝐥𝐚𝐲𝐨𝐮𝐭 𝐜𝐚𝐥𝐜𝐮𝐥𝐚𝐭𝐢𝐨𝐧𝐬 + 𝐆𝐏𝐔-𝐟𝐫𝐢𝐞𝐧𝐝𝐥𝐲 𝐚𝐧𝐢𝐦𝐚𝐭𝐢𝐨𝐧𝐬 = 𝐅𝐚𝐬𝐭𝐞𝐫 𝐔𝐈.⚡ Small optimizations in rendering can significantly improve user experience and Core Web Vitals. #WebPerformance #FrontendDevelopment #JavaScript #ReactJS #PerformanceOptimization #CoreWebVitals #shohelranabaig #codewithbaig

Are unnecessary re-renders slowing down your React application? We all know the frustration of a laggy UI, but often the solution is hidden within simple optimization techniques we are already using just not effectively. I’ve put together a visualization that simplifies three of the most powerful strategies for optimizing React performance. Here is the quick breakdown: 1. Code Splitting: How React.lazy and Suspense can drastically improve initial load times by loading code only when it's absolutely necessary. 2. The Re-render Problem: Understanding that non-primitive data types (objects/functions) are assigned new memory addresses on every render the main culprit of expensive recalculations. 3. The Memoization Toolkit: A side-by-side comparison of when to deploy React.memo, useCallback, and useMemo to cache components, functions, and heavy calculation values. A little optimization can go a long way toward a smoother user experience. Save this guide for your next optimization sprint! 👇 How do you approach performance tuning in your React projects? Are you using useMemo sparingly, or is it your go-to optimization tool? Let’s share some best practices below. #ReactJS #WebDevelopment #FrontendEngineering #PerformanceOptimization #JavaScript #SoftwareEngineering