Tonye Onuoha’s Post

💡 𝗧𝗶𝗽 𝗼𝗳 𝘁𝗵𝗲 𝗗𝗮𝘆 — 𝗥𝗲𝗮𝗰𝘁 𝗗𝗶𝗱 𝘆𝗼𝘂 𝗸𝗻𝗼𝘄? In React, 𝗳𝘂𝗻𝗰𝘁𝗶𝗼𝗻𝘀 𝗱𝗲𝗳𝗶𝗻𝗲𝗱 𝗶𝗻𝘀𝗶𝗱𝗲 𝗰𝗼𝗺𝗽𝗼𝗻𝗲𝗻𝘁𝘀 𝗮𝗿𝗲 𝗿𝗲𝗰𝗿𝗲𝗮𝘁𝗲𝗱 𝗼𝗻 𝗲𝘃𝗲𝗿𝘆 𝗿𝗲𝗻𝗱𝗲𝗿. This means passing them as props can trigger unnecessary re-renders in child components. 🔧 𝗕𝗲𝘀𝘁 𝗽𝗿𝗮𝗰𝘁𝗶𝗰𝗲: - Use "useCallback" to memoize functions when passing them down - Only do this when necessary (e.g., with "React.memo" or dependency arrays) Not every function needs memoization—but knowing when it matters is key. #React #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #PerformanceOptimization #SoftwareEngineering #CodingTips #FullstackDeveloper

💡 𝗧𝗶𝗽 𝗼𝗳 𝘁𝗵𝗲 𝗗𝗮𝘆 — 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 𝗗𝗶𝗱 𝘆𝗼𝘂 𝗸𝗻𝗼𝘄? In React Native, "useEffect" 𝗿𝘂𝗻𝘀 𝗮𝗳𝘁𝗲𝗿 𝗲𝘃𝗲𝗿𝘆 𝗿𝗲𝗻𝗱𝗲𝗿 𝗯𝘆 𝗱𝗲𝗳𝗮𝘂𝗹𝘁—not just once. If you forget the dependency array, your effect will run on 𝗲𝘃𝗲𝗿𝘆 𝗿𝗲-𝗿𝗲𝗻𝗱𝗲𝗿, which can lead to: - Repeated API calls - Performance issues - Unexpected bugs 🔧 𝗕𝗲𝘀𝘁 𝗽𝗿𝗮𝗰𝘁𝗶𝗰𝗲: - Add "[ ]" to run once on mount - Specify dependencies to control when it runsarrays) Being intentional with dependencies = predictable behavior. #ReactNative #MobileDevelopment #JavaScript #AppDevelopment #SoftwareEngineering #CodingTips #React #BestPractices #FullstackDeveloper

⚛️🚀Building reusable components is one of the best ways to write cleaner, scalable React code. In my latest blog, I break down how I created a dynamic, beginner‑friendly button component that adapts based on props—no more repeating the same markup. From conditional rendering to flexible class handling, this approach keeps your UI consistent and efficient. A great starting point for anyone improving their React workflow! https://lnkd.in/djJWMbZj #ReactJS #WebDevelopment #FrontendDev #ReusableComponents #JavaScript #CleanCode #ReactTips #TailwindCSS #CodingJourney #SoftwareEngineering

⚛️ useState Hook in React — Made Simple State is what makes your UI dynamic and interactive. With useState, you can: • Store data inside a component • Update the UI instantly • Build interactive applications Example: const [count, setCount] = useState(0); 👉 When the state updates, React automatically re-renders the component. Props pass data. State manages it. Are you using useState effectively in your projects? #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #ReactHooks #Coding

Most developers use useEffect… but don’t fully understand it. And that’s where bugs, unnecessary re-renders, and performance issues begin ⚠️ The truth is 👇 👉 If you understand useEffect, you understand the entire React lifecycle. From: ✔️ Mounting ✔️ Updating ✔️ Unmounting Everything is controlled by one powerful hook. 💡 Key mindset shift: Stop thinking “when does this run?” Start thinking 👉 “what should trigger this?” That’s how you write clean, optimized React code. 🔥 Pro Tip: Don’t use useEffect by default. Use it only when you need side effects (API calls, subscriptions, DOM changes). #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #ReactHooks #useEffect #CodingTips #SoftwareDevelopment #Developers #TechCareers

most React developers have too many useEffects. i did too. until i read this rule and couldn't unsee it: if you're using useEffect to sync state with another state you don't need useEffect. here's what i mean. (the pattern 1 .. i see everywhere) but pattern 2 give same result . no effect. no extra render cycle. useEffect is for syncing React with something outside React. - fetching data from an API - setting up a subscription - manually touching the DOM not for calculating values you could just... calculate. every unnecessary useEffect is a hidden render cycle your users pay for. before you write useEffect ask one question: am i syncing with something outside React, or am i just doing math? if it's math delete the effect. #reactjs #typescript #webdevelopment #buildinpublic #javascript

🚀 Learning React Step by Step! Today I practiced a simple but powerful concept — building a small counter-based feature using React. Here’s what I worked on: 🔹 Managing state to track user clicks 🔹 Updating UI dynamically based on user interaction 🔹 Displaying different messages based on conditions It’s interesting to see how just one value (state) can control multiple parts of the UI! Small steps, but each one is helping me understand how React works behind the scenes 💻 Looking forward to building more interactive features! #React #WebDevelopment #FrontendDevelopment #JavaScript #LearningInPublic

How to prevent unnecessary re-renders in React ⚛️ After understanding why components re-render, the next step is learning how to control unnecessary ones. ⸻ 🔹 React.memo It helps prevent a component from re-rendering when its props haven’t changed. ⸻ 💡 Why it matters: Unnecessary re-renders can affect performance, especially in larger or complex components. ⸻ 🧠 Simple understanding: Same props → no re-render Changed props → re-render ⸻ ⚠️ Important: React.memo is useful, but should be used only when needed. ⸻ Small optimizations can make a big difference ⚡ #ReactJS #FrontendDevelopment #JavaScript #ReactHooks #Performance #LearningInPublic

💡 𝗧𝗶𝗽 𝗼𝗳 𝘁𝗵𝗲 𝗗𝗮𝘆 — 𝗥𝗲𝗮𝗰𝘁 𝗗𝗶𝗱 𝘆𝗼𝘂 𝗸𝗻𝗼𝘄? In React, 𝗲𝘃𝗲𝗻𝘁 𝗵𝗮𝗻𝗱𝗹𝗲𝗿𝘀 𝗿𝗲𝗰𝗲𝗶𝘃𝗲 𝗮 𝘀𝘆𝗻𝘁𝗵𝗲𝘁𝗶𝗰 𝗲𝘃𝗲𝗻𝘁, 𝗻𝗼𝘁 𝘁𝗵𝗲 𝗻𝗮𝘁𝗶𝘃𝗲 𝗯𝗿𝗼𝘄𝘀𝗲𝗿 𝗲𝘃𝗲𝗻𝘁. React wraps native events in a 𝗦𝘆𝗻𝘁𝗵𝗲𝘁𝗶𝗰𝗘𝘃𝗲𝗻𝘁 to ensure consistent behavior across browsers. 🔧 𝗪𝗵𝘆 𝘁𝗵𝗶𝘀 𝗺𝗮𝘁𝘁𝗲𝗿𝘀: - You get a unified API regardless of the browser - But the event object may be 𝗽𝗼𝗼𝗹𝗲𝗱 𝗮𝗻𝗱 𝗿𝗲𝘂𝘀𝗲𝗱 𝗕𝗲𝘀𝘁 𝗽𝗿𝗮𝗰𝘁𝗶𝗰𝗲: If you need to access the event asynchronously, store needed values immediately. Understanding this helps avoid subtle bugs. #React #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #SoftwareEngineering #CodingTips #BestPractices #FullstackDeveloper

💡 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