Silent Bug in React Native App Auth Flow

Built a Real-Time Chat App with WebSocket & Flutter! Ever wondered why your favorite chat apps feel so instant? The secret is WebSocket — and here's why it beats REST API for real-time communication: ⚡ WebSocket vs REST API REST API WebSocket Connection Opens & closes every request Stays open permanently Communication Client asks, server answers Both can talk anytime Speed Slower (new request each time) Faster (no repeated handshakes) Best for Fetching data Live chat, notifications, games With REST, your app has to keep asking "any new messages?" every few seconds. With WebSocket, the server instantly pushes messages the moment they arrive. No polling. No delay. 🛠️ What I Built Backend (Node.js) WebSocket server that keeps connections alive Broadcasts messages instantly to all connected clients Sends a welcome message to every new user who joins Frontend (Flutter) WhatsApp-style chat UI with message bubbles Your messages on the right 🔵, others on the left ⚪ Auto-scrolls to the latest message Connection error handling with a Retry button Works across multiple users in real time 💡 Real World Use Cases 💬 Live chat & messaging apps 📈 Stock price / crypto live updates 🎮 Multiplayer game communication 🔔 Real-time notifications 🛎️ Live customer support The best part? When one user sends "hi", every connected user sees it instantly — no refresh, no delay, just pure real-time magic. ✨ #Flutter #WebSocket #NodeJS #RealTime #MobileApp #WebDevelopment #Programming #TechBuild

🙌 𝐇𝐞𝐲 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 𝐝𝐞𝐯𝐬, 𝐬𝐭𝐚𝐭𝐞 𝐩𝐞𝐫𝐬𝐢𝐬𝐭𝐞𝐧𝐜𝐞 𝐣𝐮𝐬𝐭 𝐠𝐨𝐭 𝐞𝐚𝐬𝐢𝐞𝐫. As Flutter apps grow, managing state with tools like 𝐒𝐡𝐚𝐫𝐞𝐝𝐏𝐫𝐞𝐟𝐞𝐫𝐞𝐧𝐜𝐞𝐬 can quickly become messy and tightly coupled. Recently, I started using 𝐇𝐲𝐝𝐫𝐚𝐭𝐞𝐝𝐁𝐥𝐨𝐜… and it honestly changed the way I handle state. ✨ 𝐍𝐨 𝐞𝐱𝐭𝐫𝐚 𝐛𝐨𝐢𝐥𝐞𝐫𝐩𝐥𝐚𝐭𝐞 ✨ 𝐍𝐨 𝐦𝐚𝐧𝐮𝐚𝐥 𝐜𝐚𝐜𝐡𝐢𝐧𝐠 ✨ 𝐒𝐞𝐚𝐦𝐥𝐞𝐬𝐬 𝐬𝐭𝐚𝐭𝐞 𝐫𝐞𝐬𝐭𝐨𝐫𝐚𝐭𝐢𝐨𝐧 𝐚𝐟𝐭𝐞𝐫 𝐚𝐩𝐩 𝐫𝐞𝐬𝐭𝐚𝐫𝐭𝐬 It just works; your app remembers everything, exactly how users expect. 💡 𝐈’𝐯𝐞 𝐟𝐨𝐮𝐧𝐝 𝐢𝐭 𝐞𝐬𝐩𝐞𝐜𝐢𝐚𝐥𝐥𝐲 𝐮𝐬𝐞𝐟𝐮𝐥 𝐟𝐨𝐫: • Login sessions • Theme switching (Dark / Light) • User preferences ⚠️ 𝐓𝐡𝐚𝐭 𝐬𝐚𝐢𝐝, 𝐢𝐭’𝐬 𝐧𝐨𝐭 𝐚 𝐬𝐢𝐥𝐯𝐞𝐫 𝐛𝐮𝐥𝐥𝐞𝐭. I’d avoid using it for large datasets or frequently updating API data. For those cases, a proper backend or local database makes more sense. 𝐂𝐮𝐫𝐢𝐨𝐮𝐬? How are you handling state persistence in your apps? 𝐒𝐭𝐢𝐥𝐥 𝐮𝐬𝐢𝐧𝐠 𝐒𝐡𝐚𝐫𝐞𝐝𝐏𝐫𝐞𝐟𝐞𝐫𝐞𝐧𝐜𝐞𝐬, or have you moved to something like HydratedBloc? #Flutter #Bloc #HydratedBloc #FlutterDev #StateManagement #CleanArchitecture #MobileDevelopment

The app is working… but it feels slow.” I hear this a lot from clients. At first, everything seems fine. But as users grow, the app starts lagging… and that’s where the real problem begins. Most of the time, it’s not Laravel. It’s things like: ⚡ Unoptimized queries ⚡ Missing caching ⚡ Slow response handling As a Laravel developer, I’ve learned - performance isn’t optional… it’s the user experience. Small optimizations can make a huge difference. Is your Laravel app feeling slow too? Let’s fix it 👇 #laravel #webdevelopment #performance #developers #programming

When I first built a React app that I thought was ready for production, everything seemed fine in development. But when we tried to scale it, things fell apart. The app was slow, buggy, and hard to manage. I realized I skipped a few important steps: 🔸 I jumped straight into coding without planning the structure first. 🔸 I kept repeating UI components instead of building reusable ones. 🔸 My state management was messy, making the app unpredictable. 🔸 I didn’t handle API errors or loading states properly. 🔸 I ignored performance optimizations, and the app got slower. Once I fixed these issues and built with a clear plan, the app scaled much better. So, if you want your React app to actually scale, start with a solid foundation. Have you ever faced similar scaling issues? Let’s chat! #ReactJS #WebDevelopment #FrontendDevelopment #CleanCode #AppDevelopment

🤔 Ever typed something in a search bar… …and the app just couldn’t keep up? I noticed this in my own app. Every time I typed: 👉 “a” → request sent 👉 “ap” → another request 👉 “app” → another one 👉 “appl” → and again… 😬 One search… turned into 5–6 API calls And I was wondering: 👉 “Why does my UI feel slow?” The backend was fast. The logic was correct. But the experience? 👉 Messy. ❌ My mistake? I was calling the API on every single keystroke 💡 The fix was simple: 👉 Debouncing Now the system behaves like a human: You type… You pause… 👉 THEN it makes ONE clean request 🔥 What changed instantly: ✔️ UI felt smooth ✔️ API calls dropped massively ✔️ Backend load reduced ✔️ Overall experience improved 🧠 Realization: Sometimes your app isn’t slow… 👉 It’s just doing too much, too fast #frontend #webdevelopment #reactjs #javascript #performance #optimization #debouncing #uxdesign #softwareengineering #developers #programming #tech #buildinpublic

Developer question: I’ve built a full-stack application using Next.js (classes360.online) and am now evaluating how to extend it into a mobile app. Key considerations: • Reusing existing business logic and APIs • Performance vs development speed • Authentication/session handling • Long-term scalability Would you recommend: - React Native (possibly with Expo) for shared logic? - Converting to a PWA? - Or maintaining a separate mobile codebase? Interested in real-world trade-offs and architecture decisions others have made in similar situations.

Needed DB config before the app started. NestJS bootstrap has a clean answer. The pattern: a two-stage bootstrap using a temporary `ApplicationContext`. Spin up a lightweight NestJS app with just the DB module and a config-fetching service. Grab what you need, close the context, then pass the result into the real app factory via `forRootAsync`. This avoids reaching outside the DI container — or falling back to env-only config when you genuinely need dynamic values at boot time. One caveat: the temporary context needs its own error handling. If the DB is unreachable at startup, you want a hard failure, not a silent hang. Useful for: feature flags at boot, per-tenant configs, license validation before accepting traffic. It's one of those patterns that feels overly clever until the first time you actually need it. Have you hit the 'need DB config before the app boots' problem — and how did you handle it? #NestJS #NodeJS #TypeScript #BackendDev #SoftwareArchitecture

Day 13 - Why React Apps Feel Slow? Most developers focus on building features. But very few focus on how those features perform. And that’s where problems start. A slow app is not just a technical issue it directly impacts user experience, engagement, and retention. Common reasons your React app becomes slow: • Too many unnecessary re-renders • Large and deeply nested component trees • Improper state management • Missing memoization • Large bundle size without code splitting Reality check: Your app might be working perfectly… but still delivering a poor experience if it’s not optimized. Key takeaway: Performance is not something you fix later. It’s something you build from the start. In this series, I’ll break down how to fix these issues step by step with practical examples. Next, we’ll start with one of the most important concepts: React.memo and how it prevents unnecessary re-renders #Day13 #ReactJS #Performance #WebDevelopment #Frontend #JavaScript #Developers #Coding #LearningInPublic

Build a Real-Time Chat App with React and Firebase [2026 Edition] Build a real-time chat app in 2026 using React and Firebase to enable instant messaging, authentication, and cloud-based data sync. Leverage Firebase Firestore and modern React hooks for scalable, responsive, and interactive user experiences. For a deeper dive, check out the complete blog on our website. https://lnkd.in/dvEnYi4D #React #ReactJS #ReactDevelopment #Firebase #ReactFirebase #ChatApp #RealTimeApps #WebDevelopment #FrontendDevelopment #JavaScript #React2026 #Coding #SoftwareDevelopment #DevCommunity #Programmers #ReactTutorial #FirebaseTutorial #FullStackDevelopment #AppDevelopment #RealTimeChat #TechTrends2026 #LearnReact #ReactDev #ModernWebApps

At first… it was just a simple idea. “Let’s build a To-Do App.” Nothing fancy. Just tasks… and a list. But then things started changing… You added “mark as complete” ✔️ Then “edit & delete” ✏️ Then “save data” so tasks don’t disappear… And suddenly — You weren’t just making a to-do app anymore… You were learning how real apps work. You understood UI structure… You handled user actions… You managed data like a developer… That’s the moment it hits— Small projects don’t stay small… they level you up. Because every clean UI, every smooth interaction… starts from something as simple as this. #JavaScript #FrontendDeveloper #CodingJourney #WebDevelopment #ToDoApp #BuildInPublic #LearnToCode