React Strict Mode triggers useEffect twice in dev

Your app works fine… until real users start using it 👇 Here’s what breaks first in most React apps: Large data rendering → UI becomes laggy → Fix: Pagination / virtualization Too many API calls → Network overload → Fix: Debouncing + caching State explosion → Hard to manage logic → Fix: Split state properly Poor error handling → App crashes in edge cases → Fix: Graceful fallbacks + boundaries No loading strategy → Bad user experience → Fix: Skeleton loaders + proper states In development: → Everything feels fast In production: → Reality hits The difference? 👉 Scale exposes bad decisions That’s why I focus on: → Writing scalable code from day one → Thinking beyond “it works” Because “working” is not the goal. “Working at scale” is. Have you faced scaling issues in frontend? #Frontend #ReactJS #Scalability #SoftwareEngineering #WebDevelopment

🚀 Built an Offline-First Sync Engine (Not just a To-Do App) In this demo 👇 🔹 First half – Traditional app (breaks without internet) 🔹 Second half – Offline-first system (works seamlessly offline + syncs later) This project started as a simple task app… but quickly turned into something much deeper. 💡 What I actually built: A custom offline-first architecture A queue-based sync engine (ADD / UPDATE / DELETE) Automatic background sync on network restore Reliable local + backend data consistency 🧠 What I learned: Real-world system design thinking Difference between state-based vs event-based sync Handling async execution & ordering issues Debugging complex problems like: race conditions data inconsistency sync failures ⚙️ Tech used: Flutter • Hive • Node.js • Express This project changed how I think about apps — it’s not just about UI, it’s about how systems behave under real conditions (offline, failures, sync). Would love feedback or thoughts! 🙌 #Flutter #SystemDesign #OfflineFirst #MobileDevelopment #Expressjs #LearningByBuilding #Debugging #SoftwareEngineering

4 React Native mistakes that silently killed our app's performance. I've seen these in almost every project I've worked on — including my own early code. 1. Using anonymous functions in render Passing () => doSomething() inline creates a new function reference on every render. For Flatlists with 50+ items, this tanks performance invisibly. Move handlers outside or use useCallback. 2. Not using keyExtractor properly Skipping a stable keyExtractor forces React Native to re-render the entire list on any data change. One line fix. Massive impact. 3. Overusing state for things that don't need re-renders Storing values like scroll position or timer refs in useState causes unnecessary re-renders. useRef is your friend for values that change but don't need to trigger UI updates. 4. Skipping Hermes on older projects If you're still on a project without Hermes enabled, you're leaving significant startup-time improvements on the table. It's a config change, not a rewrite. The worst part? None of these throws errors. The app feels... slow. And users leave. Which of these have you run into? Drop it in the comments — I'm curious if #3 is as common as I think it is. 🤔 #ReactNative #MobileDev #ReactNativeDev

🚀 Still confused about managing state in large React apps? Let’s talk about Redux. One challenge I faced while building scalable apps was handling state across multiple components. Props drilling became messy, and debugging was painful. 💡 Solution: Use Redux for centralized state management. Example: const initialState = { count: 0 }; function reducer(state = initialState, action) { switch (action.type) { case "INCREMENT": return { ...state, count: state.count + 1 }; default: return state; } } 👉 With Redux: • State is stored in one global place (store) • Changes are predictable using actions & reducers • Debugging becomes much easier Why it matters: ✔ Better state control ✔ Scales well for large applications ✔ Easier debugging with dev tools 🔥 When your app grows, simple state management isn’t enough — Redux brings structure and clarity. Have you used Redux or prefer Context API? What’s your go-to approach? #FullStackDevelopment #ReactJS #Redux #WebDevelopment #JavaScript #CodingTips

Most React Native bugs are not from complex features. They come from misunderstanding the basics. Hooks. State. Component structure. I’ve seen apps break because of: • State lifted too high • Unnecessary re-renders • Logic scattered across components • Misuse of useEffect Not because React Native is hard… But because the fundamentals weren’t solid. Before optimizing performance, before adding libraries, before scaling features… Get the basics right. Because clean fundamentals = predictable apps. What core concept took you the longest to truly understand? #ReactNative #MobileDevelopment #SoftwareEngineering #CleanCode #BuildInPublic

𝗬𝗼𝘂𝗿 𝗮𝗽𝗽 𝗳𝗲𝗲𝗹𝘀 𝗳𝗮𝘀𝘁 𝗮𝘁 𝗳𝗶𝗿𝘀𝘁. 𝗧𝗵𝗲𝗻 𝘂𝘀𝗲𝗿𝘀 𝗸𝗲𝗲𝗽 𝗶𝘁 𝗼𝗽𝗲𝗻 𝗳𝗼𝗿 𝟮𝟬 𝗺𝗶𝗻𝘂𝘁𝗲𝘀... 𝗮𝗻𝗱 𝘀𝘂𝗱𝗱𝗲𝗻𝗹𝘆 𝗲𝘃𝗲𝗿𝘆𝘁𝗵𝗶𝗻𝗴 𝘀𝗹𝗼𝘄𝘀 𝗱𝗼𝘄𝗻... What changed? Nothing visible!! But under the hood, your app is 𝗟𝗘𝗔𝗞𝗜𝗡𝗚 𝗠𝗘𝗠𝗢𝗥𝗬 with every component you mount. This is the problem I kept running into while building React applications. The issue isn’t just rendering. It’s what happens after your component is done. 𝗛𝗲𝗿𝗲’𝘀 𝘄𝗵𝗮𝘁 𝗮𝗰𝘁𝘂𝗮𝗹𝗹𝘆 𝗴𝗼𝗲𝘀 𝘄𝗿𝗼𝗻𝗴: 𝟭- 𝗨𝗻𝗰𝗹𝗲𝗮𝗻𝗲𝗱 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻𝘀 Event listeners, WebSockets, or intervals keep running even after the component unmounts. They continue consuming memory silently. 𝟮- 𝗦𝘁𝗮𝗹𝗲 𝗔𝘀𝘆𝗻𝗰 𝗢𝗽𝗲𝗿𝗮𝘁𝗶𝗼𝗻𝘀 An API call finishes after the component is gone… but still tries to update state. Now you’ve got unnecessary work and warnings. 𝟯- 𝗗𝘂𝗽𝗹𝗶𝗰𝗮𝘁𝗲 𝗦𝗶𝗱𝗲 𝗘𝗳𝗳𝗲𝗰𝘁𝘀 Every re-render can attach a new listener or timer if you’re not careful. Over time, they stack up and kill performance. 𝟰- 𝗗𝗲𝘁𝗮𝗰𝗵𝗲𝗱 𝗗𝗢𝗠 𝗥𝗲𝗳𝗲𝗿𝗲𝗻𝗰𝗲𝘀 Closures hold onto old references, preventing garbage collection. Memory that should be freed… isn’t. 𝟱- 𝗛𝗶𝗱𝗱𝗲𝗻 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝗗𝗿𝗼𝗽𝘀 You won’t notice it immediately. But users with longer sessions will feel your app getting heavier and slower. This is why cleanup in useEffect isn’t optional. It’s the difference between a stable app and one that degrades over time. Most developers focus on what to run inside effects. Very few think about what to clean up. That’s where real frontend engineering begins. I broke this down deeply while building real-world React systems, covering async patterns, performance, and edge cases. Start now Link in comments 👇

Topic: React Error Boundaries – Handling Crashes Gracefully 🛑 React Error Boundaries – Because Apps Shouldn’t Crash Completely No matter how well you code, errors in production are inevitable. But should one broken component crash the entire app? ❌ No. That’s why we have Error Boundaries. 🔹 What Are Error Boundaries? Special React components that catch JavaScript errors in their child component tree. ✔ Prevent full app crash ✔ Show fallback UI ✔ Improve user experience 🔹 Where They Work ✅ Rendering errors ✅ Lifecycle method errors ❌ NOT for event handlers ❌ NOT for async code 🔹 Basic Example class ErrorBoundary extends React.Component { state = { hasError: false }; static getDerivedStateFromError() { return { hasError: true }; } render() { if (this.state.hasError) return <h1>Something went wrong</h1>; return this.props.children; } } 💡 Real-World Use Wrap risky components like: 👉 Payment forms 👉 Dashboards 👉 External integrations 📌 Production apps aren’t error-free. They’re error-tolerant. 📸 Daily React tips & visuals: 👉 https://lnkd.in/g7QgUPWX 💬 Have you implemented Error Boundaries in your projects? 👍 Like | 🔁 Repost | 💭 Comment #React #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #ErrorHandling #DeveloperLife

At this point, our team has built more Retool apps than I can recall. Most of the time, it had nothing to do with changing requirements or shifting scope. The original build was done by someone who didn't fully understand what they were building, and that gap eventually shows up quickly in production. Retool looks accessible, and in many ways, it is. But the difference between something that technically works and something that actually holds up under real usage comes down to fundamentals: JavaScript, how data flows between components, how queries interact with state, and how to structure an app that can scale. Without that foundation, you can still ship something. It just tends to be slow, fragile, and painful to maintain. Six months later, someone usually calls us to rebuild it properly. We see this often enough that it's no longer an edge case. The problem is usually the expertise behind the tool (or lack of), and that's an expensive lesson to learn after the project is already built. If you're weighing whether to build this internally or bring in someone who does it every day, that decision is worth making before the project starts and not after it breaks.

If you’re using AI tools to generate Next.js code, here’s one important thing you should never ignore. Before writing or copying any code, always clarify: Is it for App Router (/app) or Pages Router (/pages)? Which Next.js version does it support? Many developers skip this step and directly deploy. Result: build fails, zero output, and wasted time on Vercel or similar platforms. Common mistakes: - Mixing App Router with Pages Router - Using outdated methods like getServerSideProps in App Router - Forgetting "use client" in client components - Following code written for older versions like Next 12 or 13 Best practice: Always specify in your AI prompt: Use Next.js 14 or newer with App Router. Do not use pages directory or old data fetching methods. This small step can save hours of debugging and deployment frustration. Build smart. Prompt smart. #NextJS #WebDevelopment #AItools #Frontend #JavaScript #Developers

🤣 POV: You're a Developer Trying to "Just Use" an App… But Your Brain Won't Let YouWhen you're a developer, you don't just use an app anymore… you reverse-engineer it in real-time in your head.You open a simple app and suddenly your brain goes full detective mode: Hmm, this looks like conditional rendering with React hooks This transition is definitely Framer Motion or CSS animations Are they using MongoDB aggregation pipelines for this data flow? This API response is definitely debounced… nice touch Instead of enjoying the smooth UX, you're mentally breaking it down: How is this working? What stack are they using? How would I build this differently?That's when you realize — you're not just a user anymore. You're a developer for life. 🔍💻💬 Fellow devs — what's the funniest moment when you caught yourself analyzing an app's architecture instead of just using it? #DevelopersLife #FullStackDeveloper #MERNStack #SoftwareEngineering #TechHumor #CodingLife #WebDevelopment #ReactJS #TechTrends #DevOps #SystemDesign #Innovation #Technology