I was building a UI recently and something felt off. I added a console.log out of habit. Clicked a button once. Watched the same API call fire 10 to 11 times in a row. One click. Ten requests. I knew React re-renders components when state changes. What I didn't fully appreciate was how easy it is to accidentally create a chain reaction. A state update triggers a render, something inside that render looks "new" to React even when it isn't, and suddenly your useEffect is firing over and over. The fix came down to being more precise: stabilising object references with useMemo, wrapping functions in useCallback, and being honest about what my useEffect actually needed to watch. After fixing it: one click, one API call. It sounds obvious in hindsight. It always does. If you've hit this before, how did you catch it? Console.log is how I found mine. I'm told the React DevTools Profiler is better. That's what I'm learning next. React developers, how do you debug unexpected re-renders in production? #React #Frontend #FrontendDevelopment #ReactJS #WebDevelopment #JavaScript #SoftwareEngineering

🎬 Movie Search Application (React) Developed a responsive movie search web application using React that allows users to search and explore movies in real time. The application integrates with an external movie API to fetch dynamic movie data such as title, poster, year. Implemented core React concepts including state management using hooks like useState and useEffect, along with event handling for search functionality. Added features like instant search, Enter key search, conditional rendering for error handling, and sorting movies by release year. Designed a clean and responsive UI using Flexbox and styled-components, including dark mode support for better user experience. 🔗 Live Demo https://lnkd.in/g2X-_Ken 💻 GitHub Repository https://lnkd.in/gczd-9bY #ReactJS #JavaScript #APIIntegration #RESTAPI #StyledComponents #ResponsiveDesign #FrontendDevelopment #WebDevelopment #MovieApp #FrontendProject #Coding #WebApp #Netlify #GitHub #OpenSource

Day 15 : Expanding my React toolkit: Building Reusable Components 🚀 I just wrapped up a project focused on mastering Props and Mapping in React. ⚛️ I built a dynamic Price Card component that efficiently renders data from an array, ensuring the code remains DRY (Don't Repeat Yourself) and scalable. Key features: • Functional Components with modern ES6 syntax. • Dynamic data rendering using the .map() method. • Responsive CSS styling for a clean UI/UX. Continuing to push my front-end boundaries! What’s your favorite way to structure components in React? #ReactJS #WebDevelopment #CodingJourney #FrontEnd #JavaScript #Programming #AmarjeetSir Gravity Coding

Just completed Epic React's React Hooks workshop! 🎉 Honestly? I thought I knew React Hooks. I use them every day. useState, useEffect, useRef - they're practically muscle memory at this point. So when I started this workshop, I expected a quick revision. The workshop didn't just recover WHAT hooks do and HOW to use them - it went deep into the WHY behind each decision and their appropriate applications. And that's where the real value was. Here's what genuinely shifted my thinking: - State is component-specific memory - understanding this framing made it immediately clear when to use state vs. derive a value. Always derive state when you can. Fewer sync bugs, cleaner code. - Lazy initializers in useState - passing a function instead of a value means expensive computations only run once, on mount. A small change, meaningful performance win. - Side-effects & the React lifecycle - Mount -> Render -> DOM update -> Layout Effects -> Paint -> Effects. Seeing the full lifecycle laid out made useEffect's behaviour click in a way it never quite had before. - Memory leaks, explained properly - Event listener callbacks close over their scope. If you don't clean up, those closures linger in memory long after a component unmounts. - WHY objects don't belong in dependency arrays - useEffect uses Object.is for comparison. A new render produces a new object reference, even with identical properties. Destructure and pass primitives instead. - State update batching - dispatch doesn't immediately re-render. Updates are queued, batched per event, then applied. - useId() for accessibility - generating stable IDs for linking labels and inputs, preventing hydration mismatches, and building truly accessible reusable components. Often overlooked, genuinely important. First-principles understanding is what separates code you write from code you understand. This workshop is a masterclass in that approach. A huge thank you to Kent C. Dodds - the way this course is structured around application and WHY before HOW is exactly the kind of teaching that actually sticks. Onward to the next workshop! 🚀 #React #ReactJS #ReactHooks #Frontend #FrontendDevelopment #WebDevelopment #JavaScript #EpicReact #LearningInPublic

Mastering React State with Hooks Ever felt like your React components are getting cluttered with too much state logic? Here’s a simple idea that can seriously clean things up: Custom Hooks What’s the big deal? Custom hooks let you extract and reuse stateful logic across components. Instead of repeating the same `useState` and `useEffect` logic everywhere, you write it once—and reuse it. Can they really halve your code? In many cases… YES. Imagine this: Instead of writing the same logic in 5 components, you move it into a custom hook like `useFetchData()` or `useFormHandler()`. Now you: Reduce duplication Make components cleaner Improve readability Make debugging easier Simple Example Before: Each component handles its own API call logic After: One custom hook handles everything Components just use it Why you should start using them Keeps your code DRY (Don’t Repeat Yourself) Makes scaling your app easier Encourages better structure Pro Tip Start small. Pick one repeated logic (like form handling or API calls) and convert it into a custom hook. #React #WebDevelopment #Frontend #JavaScript #Coding #SoftwareDevelopment

You wrapped your component in React.memo… but it still re-renders 🤔 I ran into this more times than I’d like to admit. Everything looks correct. You’re using React.memo. Props don’t seem to change. But the component still re-renders on every parent update. Here’s a simple example: const List = React.memo(({ items }) => { console.log('List render'); return items.map(item => ( <div key={item.id}>{item.name}</div> )); }); function App() { const [count, setCount] = React.useState(0); const items = [{ id: 1, name: 'A' }]; return ( <> <button onClick={() => setCount(count + 1)}> Click </button> <List items={items} /> </> ); } When you click the button the List still re-renders. At first glance, it feels wrong. The data didn’t change… so why did React re-render? The reason is subtle but important: every render creates a new array. So even though the content is the same, the reference is different. [] !== [] And React.memo only does a shallow comparison. So from React’s perspective, the prop did change. One simple fix: const items = React.useMemo(() => [ { id: 1, name: 'A' } ], []); Now the reference stays stable and memoization actually works. Takeaway React.memo is not magic. It only helps if the props you pass are stable. If you create new objects or functions on every render, you’re effectively disabling it without realizing it. This is one of those bugs that doesn’t throw errors… but quietly hurts performance. Have you ever debugged something like this? 👀 #reactjs #javascript #frontend #webdevelopment #performance #reactperformance #softwareengineering #programming #coding #webdev #react #typescript

I’ve been go through React hooks lately, and I just finished building a fully functional Todo List that handles complex state updates. 💻 I know this isn't a "polished" UI yet, but through building this project, I’ve learned an immense amount—from the hair-pulling bugs I faced to the satisfaction of finally making the logic work. While a Todo list is a classic "beginner" project, the real architectural lessons happened under the hood: 🔹 Immutability with the Spread Operator: Learning why we never mutate state directly and instead use [...prevTodos] to create clean, predictable UI updates. 🔹 Unique Identifiers: Implementing uuidv4 for keys to ensure React's reconciliation process stays efficient and bug-free. 🔹 Functional State Updates: Using the callback pattern (prevTodos) => ... to ensure I'm always working with the most recent data, avoiding "stale state" traps. 🔹 Conditional Styling: Using ternary operators to toggle text-decoration for a "Mark as Done" feature. Every bug I fixed was a lesson in disguise. Next step: persisting this data with localStorage and then focusing on the CSS! 🏗️ #ReactJS #FrontendDevelopment #Coding #WebDev #StateManagement #LearningByDoing

🔥 React DevTools: Common Issues & How to Use It Effectively React DevTools is one of the most powerful tools for diagnosing performance issues… but many developers don’t use it correctly. Here’s what I’ve learned 👇 ------------------------------------- 🔍 Common Issues Developers Face: 1️⃣ Not Profiling – Many just inspect components without measuring re-renders or performance. 2️⃣ Ignoring Component Trees – Deep trees hide unnecessary renders. 3️⃣ Overlooking State & Props – Changes in parent state can trigger unexpected child re-renders. 4️⃣ Misreading Flame Charts – Not understanding which operations are expensive. 💡 How to Use React DevTools Effectively: ------------------------------------------------- ✅ Profiler Tab – Measure every render and find bottlenecks. ✅ Highlight Updates – See exactly which components re-render. ✅ Inspect Component Props & State – Check if changes are causing unnecessary renders. ✅ Compare Commits – Analyze how updates affect your tree. ✅ Filter and Focus – Only measure the components that matter. 🚀 Pro Tip: “React DevTools doesn’t just show problems… it tells you exactly where to optimize.” 💬 Your Turn: Which feature of React DevTools helped you most in improving performance? #reactjs #reactdeveloper #webdevelopment #frontend #javascript #reactperformance #profiling #devtools #softwareengineering #frontendengineering #performanceoptimization #cleancode #techlead