Understanding Async Logic with Redux Toolkit

🚀 3 React Mistakes I Made (So You Don't Have To) After 2+ years building MERN applications, here are the errors that cost me hours of debugging: 1️⃣. Not using useCallback for event handlers 👉 Result: Components re-rendering unnecessarily ✅ Fix: Wrap handlers in useCallback with proper dependencies 2️⃣. Forgetting to cleanup useEffect 👉 Result: Memory leaks and console warnings ✅ Fix: Always return cleanup function for subscriptions 3️⃣ Prop drilling instead of Context API 👉 Result: Messy, hard-to-maintain code ✅ Fix: Use Context or state management for shared data The best lessons come from mistakes! 💡 What React mistakes taught you the most? Drop them below! 👇 #ReactJS #WebDevelopment #JavaScript #MERNStack #CodingTips

🚀 React Performance Hooks: useMemo vs useCallback Ever stared at your React code wondering which hook to reach for? Here's the breakdown every developer needs: useMemo 💾 → Memoizes a value → Caches expensive computations → Returns: a value useCallback 🔗 → Memoizes a function → Caches function references → Returns: a callback function The Golden Rule: Computing something heavy? → useMemo Passing functions to child components? → useCallback Both use dependency arrays [a, b] to know when to recalculate. Skip them and you're just adding overhead without the optimization! Pro tip: Don't over-optimize! React is fast. Profile first, then memoize. 🎯 What's your go-to rule for choosing between these two? Drop it in the comments! 👇 #ReactJS #WebDevelopment #JavaScript #Frontend #CodingTips #SoftwareEngineering #TechTips #LearnToCode

🚀 30 Days — 30 React Mistakes Beginners Make 📅 Day 3/30 ❌ Mistake: Forgetting Dependency Array in useEffect My API kept calling again and again 🔥 Code 👇 useEffect(() => { fetchData() }) 💡 What Happened? Without a dependency array: Component renders useEffect runs setState updates Component re-renders useEffect runs again Infinite loop 🔁 ✅ Correct Way Run once: useEffect(() => { fetchData() }, []) Or add specific dependencies: useEffect(() => { fetchData() }, [userId]) 🎯 Lesson Always control when your effects run. Uncontrolled side effects = performance issues. #ReactJS #FrontendDevelopment #JavaScript #CodingMistakes #SoftwareEngineering #WebDev #ReactHooks #DevCommunity #BuildInPublic #LearnReact

📚 React Learning — State & useState Today I revised the concept of state and the useState hook in React. State acts as a component’s memory that stores dynamic data. Using useState, we can manage and update this data, and whenever the state changes, React automatically re-renders the component to reflect the updated UI. Strengthening the fundamentals step by step. #ReactJS #FrontendLearning #JavaScript #ReactConcepts #100DaysOfCode

#Day 87, 🚨 Common Mistakes in React JS 🚨 Just wrapped up a session on the most common pitfalls in React JS! 😅 If you're a React dev, listen up! 🙌 🔹 1. Improper Router Rendering - Using <Link> outside <BrowserRouter>? 💥 Wrap it up! - Missing <Route exact path>? 😬 Paths overlapping? Fix it! 🔹 2. Promise Object Mishaps - Handling API calls? 🔄 Use .then() or async/await properly! - Passing params via routes? 👉 Use useParams()! 🔹 3. Component Confusion - Multiple routes with same path? 🚫 Avoid it! - Missing exact keyword? 🔍 Get precise routing! 🔹 4. Ordering of Routes - Order matters! 👉 Put specific routes first. 🔹 5. Sweet Spot for Components - Keep common components in the right place 🌟! 💡 Takeaways: - Use BrowserRouter wisely 🧐 - Handle promises like a pro 🔥 - Route like a boss 🚀 #ReactJS #WebDev #CodingMistakes #Frontend #LearningInPublic 🚀 #ccbp #nxtwave #100daysofcoding

If you’re learning React, this mistake with reusable components is very common. When I was learning React, I believed reusable components should handle everything. So I built components that fetched data, handled loading & errors, and changed behavior for every page. It felt smart at first. Later, it became painful. This carousel shows: – The mistakes I made – Why they were wrong – The simple pattern that actually scales If you’re on the React learning curve, this might save you weeks of confusion 👇 #React #ReactJS #MERN #MERNStack #JavaScript #FrontendDevelopment #WebDevelopment #SoftwareDeveloper #FullStackDeveloper #CleanCode #SoftwareEngineering #LearningInPublic #DeveloperJourney #DevCommunity

React gives us powerful optimization tools… But many devs use them randomly. Here’s the simple rule: 🟠 useEffect → for side effects (API calls, subscriptions, DOM work) 🔵 useMemo → to memoize computed values 🟢 useCallback → to memoize functions If you use useEffect for calculations… you’re misusing it. If you pass new functions every render… you cause re-renders. The goal is NOT to use all 3 hooks. The goal is to use the right hook for the right job. Which one confused you the most when learning React? 👇 #ReactJS #FrontendDeveloper #WebDevelopment #JavaScript #CodingTips #ReactHooks #MERNStack #SoftwareDevelopment

🚀 30 Days — 30 Coding Mistakes Beginners Make Day 10/30 I increased state twice… but it only updated once 😐 setCount(count + 1) setCount(count + 1) I expected +2 I got +1 Because React batches state updates. Both lines used the same OLD value of `count`. Fix 👇 setCount(prev => prev + 1) Functional updates always receive the latest state. This is very important in: counters, carts, likes, and real-time UI. Day 11 tomorrow 👀 #30DaysOfCode #reactjs #javascript #frontend #webdevelopment #codeinuse

How I Understood useCallback At first, useCallback felt useless. My code worked. So why add it? 🤷♂️ Then I learned one thing: 👉 Every render creates a new function. React doesn’t care about logic. It cares about references. useCallback simply tells React: “Please remember this function. Change it only when needed.” That’s it. I now use it mainly when: Passing functions to child components Avoiding unnecessary re-renders Lesson learned 👇 Understand the problem first. The hook will make sense automatically. Still learning. 🚀 #ReactJS #useCallback #FrontendDeveloper #LearningInPublic #Frontend #LearningInPublic #JavaScript #WebDevelopment #DeveloperJourney

⚛️ Day 10 of Learning React.js Today I learned about Hooks in React.js. I understood that Hooks allow us to use state and other React features inside functional components. Earlier, state was mainly used in class components, but Hooks make functional components more powerful and flexible. What I learned today: What are Hooks in React Why Hooks are used Basic idea of useState How Hooks improve code structure Managing dynamic data inside components Learning Hooks made me realize how React handles dynamic UI updates efficiently. Things are starting to connect now — components, props, functions, and state. Step by step, building stronger React fundamentals 🚀 #ReactJS #Hooks #useState #FrontendDevelopment #JavaScript #WebDeveloper #LearningJourney #Consistency