React.memo for Better Performance

I almost shipped a slow React app. Not broken. Not buggy. Just… slow. Everything worked. But something felt off — clicks felt delayed, UI had that subtle lag that users notice even if they can't explain it. I opened React DevTools Profiler and what I saw genuinely surprised me. One small interaction was triggering re-renders across components that had absolutely nothing to do with it. Functions being recreated on every render. Child components updating for no reason. I wasn't writing bad code. I just didn't understand what React was actually doing under the hood. Three things that changed everything for me: React.memo — child components stopped re-rendering unless their props actually changed useCallback — function references stayed stable between renders instead of being recreated every time useMemo — expensive calculations stopped running on every single render The difference was immediate. The app felt alive in a way it didn't before. No library. No major refactor. Just understanding how React works and using the tools it already gives you. If your React app feels sluggish and you haven't opened the Profiler yet — that's your next 30 minutes sorted. #ReactJS #Frontend #JavaScript #WebDevelopment #Programming

React Development: CRA vs Vite – What Should You Choose in 2026? When starting a new React project, one of the first decisions is choosing the right build tool. Traditionally, Create React App (CRA) was the go-to option, but today Vite is rapidly becoming the preferred choice. Create React App (CRA) =>Beginner-friendly with minimal setup =>Large and mature ecosystem =>Slower startup and build times as applications grow =>Limited flexibility without ejecting Vite =>Fast development server with near-instant startup =>Efficient Hot Module Replacement for better productivity =>Uses modern ES modules for optimized performance =>Flexible and extensible with plugins Key Insight: Vite serves code on demand instead of bundling everything upfront, which significantly improves development speed and experience. Why developers are choosing Vite: =>Faster development and build performance =>Improved developer experience =>Modern architecture aligned with current web standards My Take: For beginners, CRA is still a simple starting point. For real-world and scalable applications, Vite is a better choice. The shift towards faster and more efficient tooling is clear, and Vite represents that direction. #ReactJS #WebDevelopment #Frontend #JavaScript #Vite #CreateReactApp #Coding #Developers #codebegun

I noticed something small… that actually breaks user experience. Open the same app in two tabs. Change the language in one tab. The other tab stays the same. Now the user sees two different languages at the same time. That’s confusing. This happened in my React app. The feature worked perfectly… but only in a single tab. The problem wasn’t the backend. It was that tabs don’t share state by default. So I fixed it using the BroadcastChannel API. It lets tabs communicate with each other in real time. Now the flow is simple. • Change language in one tab • Send a message using BroadcastChannel • All other tabs receive it instantly • UI updates everywhere No refresh. No extra API calls. Everything stays in sync. For more advanced setups, this can also be combined with: • localStorage (for better browser support) • Service Workers (for more control) Final thought. Sometimes the issue isn’t the feature… It’s how it behaves in real-world usage. Would love to hear how others are solving multi-tab state problems. #React #JavaScript #Frontend #WebDevelopment #SoftwareEngineering #WebDev #FrontendDevelopment #Programming #Developers #Coding #BuildInPublic #DevCommunity #Tech #SoftwareDeveloper #ReactJS #JS #WebApps

Your React app is slower than it needs to be. Here's how to fix it. Most devs write React the way they learned it — and never revisit it. The result? Unnecessary re-renders, bloated bundles and lists that freeze on scroll. In this carousel I cover 5 patterns I apply to every React project: → useCallback & useMemo — when to use them (and when not to) → Why state lifting is silently killing your render tree → Code splitting: route-level is the highest ROI change you can make → Virtualisation for long lists — 10,000 rows in under 5ms → The performance checklist, in priority order Save this. Your users will notice the difference. If you found this useful, follow me for weekly React & full-stack tips. What's your go-to React performance trick? Drop it in the comments #ReactJS #ReactPerformance #FrontendDevelopment #WebDevelopment #JavaScript #TypeScript #SoftwareEngineering #Programming #WebPerformance #ReactNative #TechTips #FullStackDeveloper #CodeQuality #DeveloperTips #Frontend

What is StrictMode in React? Ever seen your useEffect run TWICE in development? That's React's StrictMode doing its job! 𝗪𝗵𝗮𝘁 𝗶𝘀 𝗦𝘁𝗿𝗶𝗰𝘁𝗠𝗼𝗱𝗲? Think of it as a "quality checker" for your React app. It's a built-in tool that helps you catch bugs BEFORE they reach your users — without changing how your app looks or works. 𝗛𝗼𝘄 𝘁𝗼 𝘂𝘀𝗲 𝗶𝘁? Just wrap your app like this: <StrictMode> <App /> </StrictMode> That's it! ✅ 𝗪𝗵𝗮𝘁 𝗱𝗼𝗲𝘀 𝗶𝘁 𝗮𝗰𝘁𝘂𝗮𝗹𝗹𝘆 𝗱𝗼? ✅ Renders components TWICE → to catch bugs from impure rendering ✅ Runs effects TWICE → to catch missing cleanup functions ✅ Warns about deprecated/old APIs → so you stay up-to-date ✅ Checks ref callbacks → to catch memory leaks ⚠️ Important: StrictMode only runs in DEVELOPMENT. Your production build is completely unaffected! 𝗪𝗵𝘆 𝘀𝗵𝗼𝘂𝗹𝗱 𝘆𝗼𝘂 𝘂𝘀𝗲 𝗶𝘁? Because finding a bug in development is 10x easier than debugging it in production. StrictMode is like having a senior developer review your code automatically! 🚀 💡 Pro Tip: You don't have to wrap the entire app. You can wrap just a specific part to check only those components. Drop a 🔥 if you learned something new today! #ReactJS #JavaScript #FrontendDevelopment #WebDevelopment #React #Programming #100DaysOfCode #TechTips #CodingLife

🚀 Day 9: Making my React App Production-Ready! Today, I dived deep into Performance Optimization and Modularity. Writing code is one thing, but writing code that is fast and easy to maintain is what makes a professional developer. Here are my key takeaways from today’s learning: 🔹 Single Responsibility Principle (SRP): A component should do only one job. I learned to separate my "Logic" (API calls) from my "UI" (JSX). This makes the code much cleaner! 🔹 Custom Hooks: The best way to reuse logic. I extracted my fetching and online-status logic into separate hooks in the utils folder. It’s like hiring a personal assistant for my components! 🔹 Chunking & Lazy Loading: Why load a 2MB file when the user only needs 100KB? By using React.lazy(), I split my app into smaller chunks. The app now loads lightning-fast! ⚡ 🔹 Suspense Component: A "Waiting Room" for my lazy-loaded components. It prevents the app from crashing and provides a smooth experience for the user with Shimmer UIs. 🔹 Network Throttling: I practiced simulating "Offline" mode in Chrome DevTools to see how my app handles poor internet. A great developer always prepares for the worst-case scenario! Building in public helps me stay consistent and build a strong mental model. Step by step, I'm getting closer to becoming a Frontend Developer. 👨💻 #ReactJS #FrontendDevelopment #WebDevelopment #LearningJourney #BuildInPublic #Day9 #Javascript #CleanCode #Optimization

🚧 Learning React: Error Boundaries (and something unexpected…) While practicing React, I built a simple component that intentionally crashes: const BuggyComponent = () => { throw new Error("I crashed!"); }; 💥 Result? The entire app crashed. That made me think: 👉 In real apps, should one component break everything? 🛠️ Then I discovered Error Boundaries I wrapped the crashing component like this: <ErrorBoundary> <BuggyComponent /> </ErrorBoundary> Now instead of crashing: ✅ Only that part fails ✅ A fallback UI is shown ✅ The rest of the app still works 🤯 But here’s what confused me… I’ve been using functional components + hooks everywhere So why is this still a class component? After digging deeper: 1. Error Boundaries rely on lifecycle methods 2. They catch errors during the render phase 3. Hooks (like useEffect) run after render 👉 That’s why hooks can’t replace this (yet) 🧠 What I learned: 1. Error Boundary = try-catch for UI 2. Prevents full app crash 3. Works only for: >rendering errors >lifecycle methods 4. Doesn’t catch: >event handlers >async code 🚀 My takeaway: Even in modern React apps: 👉 We still use one class component for stability 👉 Everything else stays functional Still learning, still exploring. If you’ve used error boundaries in production: 👉 Do you wrap the whole app or specific components? #React #Frontend #WebDevelopment #LearningInPublic

🚀 Just built a Notes App using React! A simple yet powerful app to create, manage, and organize notes efficiently. This project helped me strengthen my frontend skills and understand real-world component structuring. 🔗 Check it out here: https://lnkd.in/gb38XjAK Would love your feedback and suggestions! 💬 #ReactJS #WebDevelopment #FrontendDevelopment #JavaScript #Coding #Projects #DeveloperJourney

“Stop learning React Native in 2026… unless you know THIS.” 🚫🔥 Yeah, I said it. Everyone is jumping into React Native thinking it’s the easiest way to build mobile apps… But most developers are missing the bigger picture 👇 ⚡ It’s fast ⚡ It’s cross-platform ⚡ It’s powerful But… ❗ Performance trade-offs still exist ❗ Not every app should be built with it ❗ Scaling can get tricky if you don’t follow best practices 💡 The truth? React Native is a game-changer — but only if you use it the right way. I created this breakdown to show: • How React Native actually works • When to use it (and when NOT to) • Tools & best practices that make a real difference 👉 So before you blindly follow the trend… Ask yourself: Are you building smart or just following hype? 💬 Be honest — React Native or Native in 2026? #ReactNative #MobileDevelopment #Developers #TechDebate #Programming #JavaScript #AppDevelopment #Coding #SoftwareEngineering #BuildInPublic #Tech

I Stopped Using So Many Libraries in React Native… And My App Got Better Sounds weird, right? At one point, my app had a library for everything: Navigation → library Forms → library Animations → library State → multiple libraries It felt “professional”… But here’s what actually happened: ❌ App size increased ❌ More bugs after updates ❌ Dependency conflicts ❌ Harder to debug issues So I tried something different: 👉 I removed as many libraries as I could. And the result? ✔ Smaller app size ✔ Better performance ✔ Cleaner codebase ✔ Easier debugging Now I follow one simple rule: “If I can build it simply… I don’t install it.” Don’t get me wrong, libraries are powerful. But too many of them can silently kill your app’s performance and maintainability. Sometimes, less really is more. Curious to know 👇 What’s one library you think every React Native developer should avoid (or must use)? React Native, Mobile Development, App Optimization, Clean Code, Dependency Management, JavaScript, Cross Platform Apps, Performance Optimization, Software Engineering #ReactNative #MobileDevelopment #CleanCode #AppDevelopment #JavaScript #SoftwareEngineering #Developers #Programming #Tech #Coding #DevCommunity #Optimization #BuildInPublic #FrontendDev