Optimize React Performance with Debouncing

React re-renders are like bad roommates: they show up uninvited, eat all your performance, and leave crumbs everywhere. Yes, you can optimize with hooks and memoization. Or you can just accept the chaos; and drink more coffee. Cheers. #frontend #react #javascript

Most developers think the key prop in React is just for lists. But one small mistake with keys can silently destroy your frontend performance and increase load time without you realizing it. I’ve seen apps where random keys caused full component remounts on every render — and debugging that was painful. If you're using Math.random() or changing keys unnecessarily this post might save you hours of debugging. #react #frontend #reactjs #javascript #webdevelopment #frontenddeveloper #softwareengineering #codingtips

react 19 has a new use() api and it breaks one of the oldest rules in react hooks must be called at the top level. always. no conditions, no loops. use() doesn't care. you can call it inside if statements, loops, conditionals - things that were never allowed before. it does two things: - reads a promise (integrates with suspense automatically) - reads context (like useContext, but more flexible) function UserCard({ userPromise }) { const user = use(userPromise); // suspends until resolved return <p>{user.name}</p>; } the catch? create your promises in server components and pass them down - not inside the client component itself, or you'll get an infinite loop on every re-render. it's a small api with a big mental shift. react is clearly moving toward a world where async is first-class - not something you bolt on with useEffect + useState + loading flags. #react #react19 #frontend #javascript #webdev

just published part 2 of my React internals series , this one covers what actually happens when you call setState and how does re-rendering works. part 1 (initial render): https://lnkd.in/dycpqavw part 2 (re-render): https://lnkd.in/d4tWTwmk #react #javascript #frontend #webdev

Unpopular opinion 👇 You probably don’t need Redux anymore.😅 With modern React: • Context API + useReducer • Server state libraries (like React Query) • Better component design Most apps can scale without heavy global state tools. But here’s the catch: 👉 The real problem isn’t the tool—it’s how we structure state. Good engineers don’t ask: “Which library should I use?” They ask: “Where should this state live?” What’s your take—Redux still essential or overused? #React #JavaScript #Frontend #SoftwareArchitecture #Thoughts

One small React habit that improved my code a lot: Stop putting everything in one component. Earlier, I used to write large components with too much logic. It worked… but became messy very quickly. Now I try to: • Break UI into smaller components • Keep logic separate • Reuse components wherever possible This makes the code cleaner and easier to scale. If you're learning React, start thinking in components, not pages. #reactjs #frontend #webdevelopment #javascript

React Query changed how I think about state — and I have not used Redux since The server state vs client state distinction that React Query makes explicit replaced my need for Redux entirely. Here is the mental model shift. Full breakdown (7 min read) → https://lnkd.in/gcUhHrV2 #ReactJS #Frontend #JavaScript #TypeScript #WebDev #UIEngineering

React Batching: The Subtle Bug Most Developers Miss   A quick React insight 👇  React doesn’t re-render on every state update.  It batches multiple updates together for performance. setCount(count + 1); setCount(count + 1);  You might expect +2, but it results in +1 —  because both updates use the same value. ✅ Correct approach: setCount(prev => prev + 1); setCount(prev => prev + 1);  React state updates are scheduled, not immediate --  and that’s where subtle bugs come from. #reactjs #javascript #frontend

🧠 React Doesn’t Update State Immediately (Even Inside the Same Function) Most people know state is async. But here’s the part many don’t realize 👇 Example const [count, setCount] = useState(0); function handleClick() { setCount(count + 1); if (count === 0) { console.log("Still zero?"); } } You click the button. Expected: count = 1 But inside that function… 👉 count is still 0 🔍 Why? Because React doesn’t update state inside the current render cycle. It schedules the update and re-renders later. 🧠 The tricky part Even this won’t work: setCount(count + 1); setCount(count + 1); 👉 Final result = +1, not +2 ✅ Correct way setCount(prev => prev + 1); setCount(prev => prev + 1); Now React uses the latest value. 🎯 The Real Insight State inside a function is a snapshot, not a live value. 💥 Why this matters This causes: Unexpected conditions Wrong calculations Confusing bugs #ReactJS #FrontendDevelopment #JavaScript #ReactHooks #WebDevelopment #CodingTips #LearningInPublic

I ignored React keys for a long time… because I thought they were just warnings 😅 Then I learned why they actually matter 👇 Imagine you have a list of users: {users.map((user) => ( <UserCard key={user.id} user={user} /> ))} React uses the key to know: ➡️ which item stayed the same ➡️ which item was removed ➡️ which item was added Without keys: React gets confused 😵 This can cause: ❌ Wrong data showing ❌ Unnecessary re-renders ❌ Weird bugs Common beginner mistake: key={index} This works sometimes… but can break when list order changes. ✅ Better: use a unique id key={user.id} Simple rule: Keys help React track items correctly. Not just remove warnings 👀 #reactjs #frontend #webdevelopment #javascript