React StrictMode Exposes Hidden Bug in Exam Submission Code

I spent 3 hours fixing a React bug yesterday. The issue wasn’t complex. My approach was. Earlier, whenever something broke in my app, I used to: ❌ randomly change code ❌ refresh again and again ❌ search Stack Overflow immediately Now I follow a simple process: ✅ check component re-renders ✅ inspect props and state flow ✅ verify API response structure ✅ use console logs step-by-step And honestly, debugging became much faster. One thing I’m learning as a developer: Writing code is important. But understanding why code breaks is what actually improves your skills. Curious to know — what’s the toughest bug you fixed recently? #ReactJS #WebDevelopment #JavaScript #FrontendDevelopment #CodingJourney #FullStackDeveloper #MERN

⚛️ Common React Mistakes That Are Killing Your Performance 💀 You think your React code is fine… . But these small mistakes are silently breaking your app 👀 Here’s what most developers still do wrong 👇 . ❌ Mutating state directly React won’t re-render properly (page 2)  ❌ Using index as key Leads to weird UI bugs when list updates (page 3)  ❌ Too much global state Unnecessary re-renders & messy logic (page 4)  ❌ useEffect misuse Missing dependency array = infinite loop 🔁 (page 5)  ❌ Storing derived state You’re duplicating logic for no reason (page 6)  ❌ Too many re-renders New objects/functions every render = performance drop (page 7)  ❌ Ignoring loading & error states Your UI breaks when API fails (page 8)  ❌ Poor folder structure Good code needs good organization (page 9)  . 🔥 React isn’t hard… Bad practices make it hard 💬 Clean code = scalable apps 📌 Save this before your next project . More Details Visit: https://lnkd.in/gRVwXCtq Call: 9985396677 | info@ashokit.in. . #ReactJS #Frontend #WebDevelopment #JavaScript #Coding #Developers #Programming #SoftwareEngineering

Most developers ignore this… until everything breaks. ⚠️ Error handling isn’t just a “good practice” — it’s what separates a beginner from a real developer. When your code runs perfectly, anyone can feel confident… But when things go wrong? That’s where your real skill shows. 💡 Without proper error handling: Your app crashes Users get frustrated Bugs become harder to track 💡 With smart error handling: You catch issues early Your app stays stable Debugging becomes easier JavaScript gives you powerful tools like try…catch, throw, and finally — use them wisely. Handle API errors, validate user input, and always expect the unexpected. Because real developers don’t just write code… They prepare for failure before it happens. #JavaScript #WebDevelopment #CodingLife #Debugging #ErrorHandling #FrontendDeveloper #LearnToCode

You're not writing clean async code - you're quietly destroying your app's responsiveness one await at a time. Every async/await call schedules microtasks. Stack enough of them in a tight loop or a render-critical path, and you'll introduce invisible delays that no one bothers measuring. Here's a real pattern I've seen cause issues: async function processItems(items) { for (const item of items) { await validate(item); await transform(item); await save(item); } } That's three microtask queue flushes per item. On 500 items, you're yielding control hundreds of times unnecessarily. Before reaching for async/await, profile using performance.mark() and check your microtask queue pressure. Sometimes a synchronous approach or Promise.all() with batching is the right call. Practical takeaway - Audit your critical rendering paths. Wrap suspect async chains with performance measurements before assuming await is always the safe choice. Async/await is a tool, not a default. Treat it like one. What's the most unexpected performance issue you've traced back to async misuse? #JavaScript #WebDevelopment #FrontendPerformance #AsyncProgramming #JSOptimization

🚀 Day 977 of #1000DaysOfCode ✨ New Hooks in React 19 You Should Know React 19 is bringing some powerful changes — especially when it comes to how we manage state and async logic. In today’s post, I’ve covered the new hooks introduced in React 19 and how they simplify common patterns that previously required extra code or libraries. From better handling of async actions to improved form management and smoother UI updates, these hooks are designed to reduce boilerplate and make your code more intuitive. What’s exciting is that these are not just new APIs — they actually change how you think about building React applications. I’ve explained them in a simple and practical way so you can start using them without confusion. If you’re working with React or planning to upgrade, understanding these hooks will give you a clear advantage. 👇 Which new React 19 hook are you most excited to try? #Day977 #learningoftheday #1000daysofcodingchallenge #FrontendDevelopment #WebDevelopment #JavaScript #React #CodingCommunity #ReactJS

🐛 A small bug wasted 3 hours of my time. I was building a React project. Everything looked correct. The API was working. The component was rendering. There were no errors in the console. But the UI was still not updating. For 3 hours, I kept checking the wrong things. Then I finally noticed the problem. I was directly mutating the state instead of creating a new one. Something as small as this: ❌ state.push(newItem) ✅ setState([...state, newItem]) And suddenly, everything started working. That moment reminded me of something important: In development, the biggest problems are often caused by the smallest mistakes. Since then, whenever something doesn’t work, I try to remember: • Don’t panic • Check the basics first • Read the code slowly • Small details matter Because debugging is not just about fixing bugs. It’s about learning how to think better. 💬 What is one bug that taught you an important lesson? #ReactJS #JavaScript #debugging #webdevelopment #developers #learning #softwareengineering

🚀 New React challenge just released on ReactChallenges.com New way of passing ref React 19 introduced a cleaner way to work with refs across components, reducing the need for forwardRef in many common cases. This new challenge helps you practice that pattern with a real UI scenario: - Open a modal - Pass a ref from the parent - Focus a textarea when the modal appears - Compare the old forwardRef approach vs the new API A practical exercise to understand one of the most useful quality-of-life improvements in modern React. Try it here: https://lnkd.in/ex2Svf-M #react #reactjs #javascript #typescript #webdevelopment #frontend

💡 Lesson Learned Today: While working on implementing search functionality in a React + Redux application, I faced an issue where the search input was updating correctly… but the results were not filtered at all 🤔 After debugging, I discovered an important insight: 👉 Not every “search issue” comes from the frontend. ✔️ The request was being sent correctly ✔️ The search parameter was included in the API call ❌ But the backend endpoint didn’t support filtering with that parameter 🔍 What I learned: Always verify: Is the correct parameter name being sent? Is the backend actually using it? Check the Network tab before assuming the issue 🚀 Sometimes the best debugging skill is knowing where the problem is NOT. #FrontendDevelopment #React #Redux #Debugging #WebDevelopment #LearningJourney

most developers don't know about the optional chaining operator gotcha. they use it everywhere. it silently hides bugs. the problem: optional chaining (?.) returns undefined if property doesn't exist. you think it's safe. bugs slip through. why it breaks: when you use optional chaining, you're not validating — you're hiding. undefined gets passed around. downstream code breaks. you spend 2 hours debugging something that should have failed immediately. the real issue: optional chaining makes bad data look safe. it lets undefined flow through your app like it's normal. the solution: validate early. fail loud. don't let undefined silently propagate. when to use optional chaining: - reading optional properties - not for safety - for convenience only when NOT to use it: - critical data paths - anything you depend on - anything that should always exist one rule: optional chaining is a convenience. validation is safety. use both. #reactjs #typescript #webdevelopment #buildinpublic #javascript

3 React tricks every developer should know ⚛️ These small things can level up your code instantly: 1️⃣ Use optional chaining (?.) Instead of: user && user.name Use: user?.name Cleaner + safer ✅ 2️⃣ Destructure props early Instead of: props.title Use: const { title } = props Makes your code readable & professional 3️⃣ Use keys properly in lists Bad: index as key ❌ Good: unique id ✅ Why? Because React uses keys for efficient rendering. Bonus tip: 👉 Keep components small & reusable Clean code > Clever code Which one do you already use? 👇