React Components Re-Render with Parent Updates

Most developers meet React’s useEffect() and immediately think: "Why is this behaving so weird?" 😵💫 But the moment you understand the dependency array, everything suddenly clicks. 💡 Here’s the simple mental model that makes useEffect easy: 🔹 No dependency array useEffect(() => {}) Runs after every render. 🔹 Empty dependency array useEffect(() => {}, []) Runs only once when the component mounts. 🔹 With dependencies useEffect(() => {}, [count]) Runs every time count changes. 🔹 Cleanup function Perfect for things like timers, subscriptions, or event listeners. Example: Start a timer ⏱️ → Do something → Clean it up when the component unmounts. That small dependency array controls everything. Once you understand this concept, useEffect stops feeling confusing and starts feeling powerful. Sometimes the most confusing parts of coding are just one small concept away from clarity. 💡 Yogita Gyanani Piyush Vaswani #React #WebDevelopment #FrontendDevelopment #JavaScript #CodingTips #ReactJS

💻 Key React Concepts That Help You Grow as a Developer Many developers learn React basics like components, props, and hooks. However, real growth comes from understanding how React works behind the scenes. 💡 1. React focuses on changes, not the entire UI It updates only what is necessary using efficient rendering techniques, which improves performance. ⚡ 2. Functions are recreated on every render Each render creates new function instances, which is why optimization techniques like `useCallback` can be useful. 🧠 3. Simplicity leads to better performance Well-structured and clean components are easier to maintain and often perform better than overly complex ones. 🔁 4. State management directly impacts performance Unnecessary or poorly managed state can lead to avoidable re-renders and slow down applications. 📈 5. Focus on user experience, not just UI A good developer prioritizes fast loading, smooth interactions, and responsiveness. ✨ Conclusion: Strong React development is not just about writing code—it’s about understanding how your application behaves and optimizing it effectively. 💬 What React concept do you find most challenging? #ReactJS #FrontendDeveloper #WebDevelopment #JavaScript #Coding #DeveloperJourney #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

🚀 Day 4 of Building React Projects Today I built a Background Changer Application using React.js. This project allows users to change the background color of the webpage dynamically with a single click. ✨ Features: • Change background color instantly • Interactive buttons for different colors • Simple and clean UI 🛠 Tech Stack: React.js JavaScript HTML CSS 🌐 Live Demo: https://lnkd.in/daCYux9G 💻 Source Code: https://lnkd.in/dEJDyd9G #ReactJS #JavaScript #FrontendDevelopment #WebDevelopment #LearningInPublic

🚀 useState vs useReducer — When to use what in React? If you’ve worked with React, you’ve probably used useState a lot. But at some point, things start getting messy… and that’s where useReducer steps in. Let’s break it down 👇 🔹 useState Best for simple state Easy to read and quick to implement Great for inputs, toggles, counters Example: const [count, setCount] = useState(0); 👉 Use it when your state logic is straightforward. 🔹 useReducer Best for complex state logic Handles multiple related state updates Keeps logic predictable and organized Example: const [state, dispatch] = useReducer(reducer, initialState); 👉 Use it when: State depends on previous state You have multiple sub-values Logic gets complicated 💡 Think of it this way: useState = Simple & quick 🟢 useReducer = Structured & scalable 🔵 ✨ Pro Tip: If you find yourself writing too many setState calls or nested updates… it’s probably time to switch to useReducer. #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #CodingTips #ReactHooks

For months, I’ve been waiting for the "perfect time" to dive into frontend development. I told myself I needed to wait for life to slow down or to find the absolute perfect tutorial. I finally realized that the perfect moment is a myth. The only way to do it is just to start. ⏳ My roadmap is keeping things simple: 1️⃣ Master JavaScript fundamentals inside and out. 2️⃣ Move on to React.js and start building real, interactive projects. I know the learning curve is steep, but I’m ready to embrace being a beginner. For the experienced developers on my feed: what was the hardest JavaScript concept for you to wrap your head around in the early days? Tell me what I should be bracing myself for! 😅👇 #frontenddeveloper #javascript #learningtocode #careerchange #codingcommunity #reactjs

🚀 Master React Router in Minutes! Here’s a simple breakdown of everything you need to know: ✅ What is Routing ✅ SPA Concept ✅ Static vs Dynamic Routes ✅ useParams() ✅ Protected Routes 💡 Key Takeaways: React uses SPA (Single Page Application) Routing helps display components based on URL Dynamic routes make apps scalable Protected routes secure your app 📌 If you're learning React, this is a must-know concept! Let me know in comments 👇 What topic should I cover next? #React #WebDevelopment #Frontend #JavaScript #ReactJS #Coding #LearnToCode

🚀 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

🚀 useEffect vs useLayoutEffect — One Small Difference, Big Impact! As a React developer, I used to think both hooks were almost the same… until I understood when they run 👇 🔹 useEffect Runs after the browser paints the UI 👉 Non-blocking → Better for performance Perfect for: ✅ API calls ✅ Event listeners ✅ Logging 🔹 useLayoutEffect Runs before the browser paints the UI 👉 Blocking → Can affect performance Used for: ✅ DOM measurements ✅ Layout adjustments ✅ Preventing UI flicker ⚡ The Key Difference: Timing 👉 useLayoutEffect runs first 👉 useEffect runs after paint 💡 Golden Rule Always use useEffect unless you specifically need to measure or modify the DOM before it renders. Understanding this small difference can help you avoid performance issues and UI glitches 👀 💬 Have you ever faced flickering issues or layout bugs in React? #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #ReactHooks #LearningInPublic

🚀 Day 5 of Building React Projects Today I built a Quiz Application using React.js. This project displays multiple-choice questions and calculates the final score based on user answers. ✨ Features: • Multiple-choice quiz questions • Instant answer selection • Score calculation after quiz completion • Simple and responsive UI 🛠 Tech Stack: React.js JavaScript HTML CSS 🌐 Live Demo: https://lnkd.in/dgSFAWTH 💻 Source Code: https://lnkd.in/dvQyFAha #ReactJS #JavaScript #FrontendDevelopment #WebDevelopment #LearningInPublic