Prevent App Data Loss on Page Refresh with React Persistent State

Everyone's talking about WebAssembly for compute-heavy web apps — real-world use cases. But most are missing the point. It's not about the technology. It's about the problem it solves. The best engineers I've worked with don't chase trends. They deeply understand the problem space and pick the right tool. Sometimes that's the latest framework. Sometimes it's a bash script. Do you agree? Or am I wrong? #WebDevelopment #TypeScript #Frontend #JavaScript

Are you mutating state directly in React? 🛑 If you are using methods like ".push()" on your state arrays, you might be causing hidden UI bugs and skipped re-renders. React relies on immutability to track changes and keep your app running smoothly. Swipe through to see the wrong way, the right way, and exactly why immutability matters in React! 👇 What is your preferred way to handle complex state objects? Let me know in the comments! #ReactJS #WebDevelopment #Frontend #CodingTips #webDev #javascript #frontendInterview

This small React mistake can break your entire app 👇 Many developers write code like this: if (condition) return null; useEffect(() => { // logic }, []); Looks fine, right? ❌ But it can cause a serious error. 💥 Error: "Rendered fewer hooks than expected" 🔍 Why this happens React has a strict rule: 👉 Hooks must be called in the same order on every render 📌 What actually happens: • 1st render → early return → useEffect NOT called • 2nd render → useEffect called 👉 Hook order mismatch = 💣 error ✅ Fix Always call hooks first, then apply conditions: useEffect(() => { // logic }, []); if (condition) return null; 💡 Rule to remember: Never call hooks conditionally. Keep them at the top level. Have you ever faced this error before? 👇 #react #nextjs #javascript #webdevelopment #frontend

I think this is a common mistake among beginners. If you're a beginner and want to avoid this, it's better to use ESLint or Biome. I recommend using Biome it's faster, and the default settings are actually pretty good 🤩

I improved performance in my React app today 🚀 The problem: Slow loading and unnecessary re-renders. What I changed: • Implemented lazy loading (React.lazy) • Applied code splitting • Optimized API calls • Reduced unnecessary state updates Result: ⚡ Faster load time ⚡ Smoother user experience Lesson: Performance is not a feature. It’s a responsibility. What’s one performance trick you always use? #reactjs #performance #webdevelopment #javascript #frontenddeveloper

How I improved React performance using lazy loading One of the biggest bottlenecks in React apps is large bundle size slowing down initial load. Here's what worked for me: Used React.lazy() to split components Wrapped components with Suspense fallback Loaded heavy modules only when needed Combined with dynamic imports for routes Results: Faster initial load time Better user experience Improved Lighthouse scores Small changes big impact. What performance optimizations have you used in React? #Reactjs #FrontEnd #webDevelopment #Performance #JavaScript #Redux

Recently worked on optimizing a React app and improved Core Web Vitals by ~35%. Key learnings: • Code splitting makes a huge difference • Avoid unnecessary re-renders • Always measure before optimizing Curious — what’s your go-to performance trick? #frontend #reactjs #nextjs #webperformance #corewebvitals #javascript #typescript #softwareengineering #performanceoptimization

Your user logged out. But the other tab doesn't know that yet. 👀 Here's how tab sync actually works in React / Next.js in 2026: BroadcastChannel - cleanest option. Send events between tabs directly, no server needed. Perfect for logout, theme changes, notifications localStorage events - fires only in OTHER tabs when a value changes. Great for syncing auth state or user preferences. Works everywhere Server-Sent Events / WebSocket - when tabs need to stay in sync with the server too, not just each other. Real-time, but heavier In Next.js - drop the listener in a useEffect inside your root layout. Done! ✅ One of those small details that separates a polished app from one that feels "off" 🚀 #react #nextjs #javascript #frontend #webdev

We had a React page that kept getting slower over time. No obvious bug. Just gradual performance drop. Here’s what we found 👇 Problem: → Page slowed down after repeated navigation → Memory usage kept increasing Root cause: → Event listeners not cleaned up → setInterval running in background → useEffect cleanup missing What I did: → Added proper cleanup functions → Removed unnecessary subscriptions → Ensured effects were scoped correctly Result: → Stable performance → No memory growth → Better user experience Insight: React doesn’t manage side effects for you. If you don’t clean up… Your app pays the price later. #ReactJS #MemoryLeak #Frontend #SoftwareEngineering #CaseStudy #JavaScript #Debugging #WebDevelopment #Engineering #Performance #FrontendDeveloper

Stop overusing useEffect, Most of the time... you don't need it. And when you do (data fetching), tools like React Query already do it better. Less effects = cleaner React apps. Are you overusing useEffect? Read more: https://lnkd.in/ddMR-8DH⁠ #React #WebDev #Frontend #JavaScript #BestPractices