Fixing React App Crash with Optional Chaining

I kept wondering why my React app was calling the same API multiple times… 🤯 At first, I thought it was a small issue. But as the project grew, it became a real problem: * Repeated API calls * Too much state handling (loading, error, data) * Debugging became painful All because I was using `useEffect` for API calls. Then I tried something different — **React Query**. And honestly, it changed the way I handle server data: ✅ Automatic caching ✅ Built-in loading & error handling ✅ Cleaner, more maintainable code The biggest realization for me: 👉 *useEffect is not meant for managing server state.* I wrote a short article sharing what I learned and how I fixed these issues in a real project 👇 🔗 https://lnkd.in/gPMTcQBw If you're working with React, this might save you some debugging time. Would love to hear how you're handling API calls in your apps 👇 #React #JavaScript #PerformanceOptimization #WebDevelopment #ReactQuery

Most React apps don’t become slow because of React. They become slow because of how we use it. Here are some common mistakes I’ve noticed 👇 ❌ Keeping too much state in one component ❌ Unnecessary re-renders due to poor structure ❌ Passing new objects/functions every render ❌ Ignoring memoization completely ❌ Fetching data again and again without caching And the worst one: ❌ Not understanding why something is re-rendering React is fast by default. But without understanding how it works, we end up creating performance issues ourselves. 💡 Small improvements that actually help: • break components into smaller pieces • use React.memo wisely • avoid unnecessary state • use tools like React DevTools Profiler You don’t need advanced tricks. Just understanding the basics deeply is enough. 💬 What’s one React issue that took you a long time to figure out? #ReactJS #FrontendDevelopment #JavaScript #WebPerformance #SoftwareEngineering #DeveloperLife #CodingTips #WebDevelopment

🚀 Just built a Redux Todo App — leveling up my React skills! I’ve been diving deeper into state management, and this project helped me truly understand how Redux Toolkit works in real-world applications. ✨ What I built: A clean and responsive Todo application where users can manage their daily tasks efficiently. 🔥 Features: ➕ Add new todo ✏️ Edit existing tasks 🗑️ Delete todo 📋 Centralized state using Redux 🧠 What I learned: ✔ How Redux store manages global state ✔ Creating slices (actions + reducers) ✔ Using useDispatch & useSelector ✔ Writing cleaner and scalable React code ⚙️ Tech Stack: React JS ⚛️ Redux Toolkit 🧠 Bootstrap 🎨 This project may look simple, but it gave me a strong foundation in state management, which is essential for building scalable apps. A huge thank you to my mentor Sonia George madam for the support throughout and guidance 💻 GITHUB :[https://lnkd.in/gVGVqpUQ] 🌐 LIVE DEMO[https://lnkd.in/gG2ET-eh] #ReactJS #Redux #WebDevelopment #FrontendDeveloper #JavaScript #100DaysOfCode

This is one of the most common ways Node.js applications crash silently in production: ```js // Unhandled rejection — will crash your app app.get('/users', async (req, res) => { const users = await User.find(); res.json(users); }); ``` If User.find() throws, there's no catch. In newer Node.js versions, it crashes the process. Two ways to fix this cleanly: Option 1 — try/catch: ```js app.get('/users', async (req, res) => { try { const users = await User.find(); res.json(users); } catch (error) { res.status(500).json({ message: 'Server error' }); } }); ``` Option 2 — Wrapper utility (cleaner at scale): ```js const asyncHandler = fn => (req, res, next) => Promise.resolve(fn(req, res, next)).catch(next); ``` Option 2 keeps your routes clean and error handling centralized. Production-ready code always handles failures gracefully. #NodeJS #JavaScript #BackendDevelopment #ExpressJS

Built a real-time chat app from scratch — no Firebase, no third-party service. Just React, Node/Express, and Socket.io handling the WebSocket connections directly. Here's what it does: Users pick a name and a room ID to join Messages appear instantly for everyone in that room Sound plays on join and on each message Auto-scrolls as new messages come in Each bubble shows author + formatted time The part that tripped me up the most was the Socket.io CORS config. I had "PUT" listed in the methods array instead of "POST" — took me longer than I'd like to admit to find that. Once it was fixed, the real-time sync clicked into place. The CSS is all hand-written too — dark theme, message bubbles aligned by sender, custom scrollbar. No Tailwind, no component library. Still early in my MERN journey (about 5 months in) but projects like this are where I'm learning the most. Full-stack flow from browser to server to broadcast — it just makes sense now. GitHub repo is in my featured section. Tech: React · Socket.io · Node.js · Express · CSS Mian Ahmad Basit #ReactJS #Nodejs #Socketio #WebDevelopment #JavaScript #MERNStack #FullStackDeveloper #RealTimeApp #CSS #buildinpublic

I built a complete enterprise app with NestJS in 48 hours. Here's everything I learned — explained so simply that even a non-developer can understand. NestJS has only 3 concepts: → Module (the container) → Controller (the receptionist) → Service (the worker) That's it. Everything else is this pattern repeated. I made a visual guide breaking down: • Why NestJS exists (and when NOT to use it) • The 3 building blocks with real code • How every request flows — 5 steps • Decorator cheat sheet (save this) • NestJS vs Express — honest comparison Swipe through the carousel ⬇️ --- What backend framework are you using in 2026? ♻️ Repost if this helped someone in your network 💾 Save for later reference #nestjs #backenddevelopment #typescript #webdevelopment #spftwareengineering #development #javascript

Built a simple CRUD app using React Worked on a project where users can: Create posts (with image, title, description) View all posts in card format Edit posts without creating duplicates Delete posts instantly Learned: 1.State management with useState 2.Handling forms & file inputs 3.Conditional rendering 4.Updating vs creating data (real CRUD logic) 5.Simple project, but helped me understand React much better. #React #JavaScript #WebDevelopment #CRUD #LearningInPublic

Most developers try to optimize React apps… without knowing what’s actually slow. That’s the problem. Before you optimize… You need to measure. That’s where the React Profiler comes in 🔍 ⚡ What is React Profiler? A tool (inside React DevTools) that shows: • Which components are re-rendering • How long each render takes • Why a component re-rendered 🧠 What it helps you discover • Unnecessary re-renders • Slow components • Expensive computations • Props/state changes causing re-renders 🔍 Real example You click a button and suddenly the whole page re-renders. Profiler shows: 👉 A parent component updated 👉 All child components re-rendered 👉 Even the ones that didn’t need to 🚀 How to fix (after profiling) • Wrap components with React.memo • Use useMemo for heavy calculations • Use useCallback for stable functions • Avoid passing new object/array references 💡 Biggest mistake Optimizing blindly. Adding memoization everywhere… without knowing if it even helps. Measure → Identify → Optimize That’s the correct flow. 💡 React performance is not about writing more code. It’s about writing smarter code based on data. Have you ever used React Profiler to fix a real issue? 👇 #React #Frontend #WebPerformance #JavaScript #SoftwareEngineering #WebDevelopment

Your React app is slow. Here's why. 🐢 Most devs jump straight to optimization tools. But 90% of the time, the fix is simpler: 🔴 Fetching data in every component independently → Lift it up or use a global state solution 🔴 Importing entire libraries for one function → `import _ from 'lodash'` hurts. Use named imports. 🔴 No lazy loading on heavy routes → React.lazy() exists. Use it. 🔴 Images with no defined size → Layout shifts kill perceived performance 🔴 Everything in one giant component → Split it. React re-renders what changed, not what didn't. Performance isn't magic. It's just not making avoidable mistakes. Save this for your next code review. 🔖 #ReactJS #Frontend #WebPerformance #JavaScript #WebDev

I just released v1.2.4 of quick-scaffolds-cli, a tool to get you from an empty folder to a running app in a short time. I like to mention what the new features are in this release. 1️⃣ Now you can generate a React + Vite starter, which includes a built-in counter and timestamp component. 2️⃣ Provides a confirmation flow to keep or change your project name. 3️⃣ Automatically runs "npm install" for React projects. 4️⃣ Interactive menus when selecting a project type. You can check the npm package - https://lnkd.in/gSiPYpTJ. And also GitHub repository - https://lnkd.in/g-bzeNkS Node.js v24 npm, Inc. #JavaScript #Node #WebDevelopment #NPM #React #ProgrammingTips #Innovation