React Native useEffect Mistakes to Avoid

React Native has officially moved beyond being just a cross-platform solution. In 2026, it delivers near-native performance with faster development cycles. #ReactNative #MobileDevelopment #CrossPlatform #JavaScript #AppDevelopment #TechTrends #SoftwareEngineering #AaludraTechnologySolutions

Unpopular opinion: Junior developers should NOT start with React. Before React - understand why React exists. Before Next.js - understand why SSR matters. Before Tailwind - understand what CSS actually does. I see so many juniors who can build a React app but can't center a div without Google. Frameworks are tools. Tools work better when you understand the problem they solve. Start with the basics. The frameworks will make 10x more sense. Agree or disagree? #FrontendDeveloper #ReactJS #WebDevelopment #JavaScript #CareerGrowth

🚀 Day 1 of Building React Projects Today I built and deployed a Todo List Application using React.js. This project helped me practice React fundamentals like state management and component-based UI development. ✨ Features: • Add new tasks • Filter tasks (All / Completed / Pending) • Clean and simple UI • Dynamic task updates 🛠 Tech Stack: React.js JavaScript HTML CSS 🌐 Live Demo: https://lnkd.in/dDAU9E7r 💻 Source Code: https://lnkd.in/dup-W67U I’ll be building and sharing more React projects daily as part of my learning journey. #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #ReactProjects #LearningInPublic

🚀 Day 6 of Building React Projects Today I built a Notes Application using React.js. This project allows users to create, edit, and delete notes while saving the data in the browser using LocalStorage. ✨ Features: • Add new notes • Edit existing notes • Delete notes • Save notes in LocalStorage • Simple and responsive UI 🛠 Tech Stack: React.js JavaScript HTML CSS 🌐 Live Demo: https://lnkd.in/dVWH9WBf 💻 Source Code: https://lnkd.in/ddGADSFQ #ReactJS #JavaScript #FrontendDevelopment #WebDevelopment #LearningInPublic

💡 𝗧𝗶𝗽 𝗼𝗳 𝘁𝗵𝗲 𝗗𝗮𝘆 — 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 𝗗𝗶𝗱 𝘆𝗼𝘂 𝗸𝗻𝗼𝘄? In React Native, "ScrollView" 𝗿𝗲𝗻𝗱𝗲𝗿𝘀 𝙖𝙡𝙡 𝗶𝘁𝘀 𝗰𝗵𝗶𝗹𝗱𝗿𝗲𝗻 𝗮𝘁 𝗼𝗻𝗰𝗲, while "FlatList" renders items 𝗹𝗮𝘇𝗶𝗹𝘆 as they appear on screen. 🔧 Why this matters: - "ScrollView" is fine for 𝘀𝗺𝗮𝗹𝗹, 𝘀𝘁𝗮𝘁𝗶𝗰 𝗰𝗼𝗻𝘁𝗲𝗻𝘁 - But for long lists, it can cause 𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝗶𝘀𝘀𝘂𝗲𝘀 𝗮𝗻𝗱 𝗺𝗲𝗺𝗼𝗿𝘆 𝗯𝗹𝗼𝗮𝘁 - "FlatList" is optimized for large datasets with better performance 𝗥𝘂𝗹𝗲 𝗼𝗳 𝘁𝗵𝘂𝗺𝗯: Small list → "ScrollView" Large/dynamic list → "FlatList" Choosing the right component = better performance. #ReactNative #MobileDevelopment #PerformanceOptimization #JavaScript #AppDevelopment #SoftwareEngineering #CodingTips #React #FullstackDeveloper

💡 𝗧𝗶𝗽 𝗼𝗳 𝘁𝗵𝗲 𝗗𝗮𝘆 — 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 𝗗𝗶𝗱 𝘆𝗼𝘂 𝗸𝗻𝗼𝘄? In React Native, "onEndReached" in "FlatList" 𝗰𝗮𝗻 𝗳𝗶𝗿𝗲 𝗺𝘂𝗹𝘁𝗶𝗽𝗹𝗲 𝘁𝗶𝗺𝗲𝘀 𝘂𝗻𝗲𝘅𝗽𝗲𝗰𝘁𝗲𝗱𝗹𝘆. This happens because it triggers based on scroll position — not just once when you hit the end. 🔧 𝗕𝗲𝘀𝘁 𝗽𝗿𝗮𝗰𝘁𝗶𝗰𝗲: - Use a 𝗹𝗼𝗮𝗱𝗶𝗻𝗴 𝗳𝗹𝗮𝗴 to prevent duplicate calls - Combine with "onEndReachedThreshold" for better control Without this, you might accidentally trigger 𝗺𝘂𝗹𝘁𝗶𝗽𝗹𝗲 𝗔𝗣𝗜 𝗿𝗲𝗾𝘂𝗲𝘀𝘁𝘀. Handle it properly = smoother infinite scrolling. #ReactNative #MobileDevelopment #PerformanceOptimization #JavaScript #AppDevelopment #SoftwareEngineering #CodingTips #React #FullstackDeveloper

🚀 Virtual DOM in React Native (Quick Insight) 👉 Yes, React Native uses a Virtual DOM, but instead of updating the browser, it updates native UI components. ⚙️ How it works: State/props change → New Virtual DOM Diffing → Compares old vs new Reconciliation → Updates only changed parts Changes reflect in native UI 🔍 Key Concepts: Diffing: Efficient comparison (uses keys, O(n)) Reconciliation: Applies minimal UI updates 🎯 Interview Answer: React Native uses Virtual DOM for efficient updates, but renders to native components instead of the browser DOM. #ReactNative #JavaScript #Frontend #MobileDevelopment #InterviewPrep

To every developer 𝙘𝙤𝙣𝙛𝙪𝙨𝙚𝙙 between 𝗡𝗲𝘅𝘁.𝗷𝘀 and 𝗥𝗲𝗮𝗰𝘁, I have a simple way to think about it: • 𝗥𝗲𝗮𝗰𝘁 𝗶𝘀 𝗷𝘂𝘀𝘁 𝘁𝗵𝗲 𝗨𝗜 𝗹𝗮𝘆𝗲𝗿: It’s a library for building interfaces. You handle 𝙧𝙤𝙪𝙩𝙞𝙣𝙜, 𝙨𝙩𝙧𝙪𝙘𝙩𝙪𝙧𝙚, and 𝙨𝙚𝙩𝙪𝙥 𝙮𝙤𝙪𝙧𝙨𝙚𝙡𝙛. • 𝗡𝗲𝘅𝘁.𝗷𝘀 𝗶𝘀 𝗮 𝗰𝗼𝗺𝗽𝗹𝗲𝘁𝗲 𝗳𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸: It builds on React and gives you everything out of the box. 𝙍𝙤𝙪𝙩𝙞𝙣𝙜, 𝙎𝙎𝙍, 𝙎𝙀𝙊, and 𝙗𝙚𝙩𝙩𝙚𝙧 𝙥𝙚𝙧𝙛𝙤𝙧𝙢𝙖𝙣𝙘𝙚. • 𝗧𝗵𝗶𝗻𝗸 𝗶𝗻 𝘁𝗲𝗿𝗺𝘀 𝗼𝗳 𝘂𝘀𝗲 𝗰𝗮𝘀𝗲: React gives you 𝗳𝗿𝗲𝗲𝗱𝗼𝗺. Next.js gives you 𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲 and 𝘀𝗽𝗲𝗲𝗱 in production. That’s the real difference. My simple rule: – 𝗦𝗺𝗮𝗹𝗹 𝗮𝗽𝗽𝘀 → 𝙍𝙚𝙖𝙘𝙩 – 𝗣𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻 𝗮𝗽𝗽𝘀 → 𝙉𝙚𝙭𝙩.𝙟𝙨 Choose based on what you’re building, not just what’s popular. 𝙒𝙝𝙖𝙩 𝙙𝙤 𝙮𝙤𝙪 𝙪𝙨𝙚 — 𝙍𝙚𝙖𝙘𝙩 𝙤𝙧 𝙉𝙚𝙭𝙩.𝙟𝙨? 👇 #SoftwareEngineering #WebDevelopment #ReactJS #NextJS #FrontendDevelopment #JavaScript #FullStackDeveloper #Programming #TechCareers #BuildInPublic #fblifestyle #TechTips #code231

Most React developers have written this at some point: ```js useEffect(() => { fetchUserData(userId); }, []); ``` It works — until it doesn't. The problem? You're telling React "run this once" but your effect actually depends on userId. When userId changes, your UI goes stale and you get bugs that are incredibly hard to trace. The fix is simple: ```js useEffect(() => { fetchUserData(userId); }, [userId]); ``` Always ask yourself: "What values does this effect read from the component scope?" Every one of them belongs in the dependency array. ESLint's exhaustive-deps rule will catch these automatically. If you're not using it, turn it on today. Small habits like this are what separate good developers from great ones. #ReactJS #JavaScript #WebDevelopment #Frontend

💡 React useEffect – Small Syntax, Big Impact useEffect is one of the most powerful hooks in React, but subtle changes can completely change your app's behavior: 🔹 useEffect(() => {}) Runs after every render – use when you need something to happen continuously. 🔹 useEffect(() => {}, []) Runs only once on mount – perfect for initializing data or fetching APIs. 🔹 useEffect(() => {}, [state]) Runs only when state changes – ideal for reacting to specific updates without extra renders. ⚡ Small dependency tweaks → big differences in performance and behavior. Mastering useEffect = fewer bugs ✅ cleaner code ✅ faster apps 🚀 #ReactJS #FrontendDevelopment #JavaScript #WebDev #CodingTips #ReactHooks