Ojasv Dixit’s Post

Why does your app "freeze" during big tasks? Even with 5 years of experience, this one still trips people up. JavaScript is "single-threaded." This means it can only do one thing at a time. The Problem: If you run a heavy calculation, the app cannot "draw" the UI or handle touches until that task is finished. Example (The Bad Way): // This freezes the screen for 5 seconds! const processData = () => { for(let i = 0; i < 1000000000; i++) { // Heavy work... } console.log("Done!"); } The Fix: Break big tasks into small pieces or move them to a "Worker." In React Native, keep the "Main Thread" free so your animations stay smooth. Senior Rule: Never block the UI. If a task takes more than 100ms, it shouldn't be on the main thread. #JavaScript #ReactNative #Coding #Performance #SimpleCoding

👩💻React confused me for 3 weeks straight. Props. State. Hooks. Components. Virtual DOM. I felt like everyone else understood it except me. Then I stopped watching tutorials and just BUILT something. Here are the 5 React concepts that finally made it click for me: 1. Component = A reusable Lego brick Everything in React is a component. Think in pieces. 2. Props = Data flowing DOWN Parent sends data to child. One direction. Always. 3. State = Data that changes When state changes, React re-renders. That’s the magic. 4. useEffect = Do something AFTER render Fetch data, set up listeners, run side effects here. 5. useState = The most used hook const [value, setValue] = useState(initialValue) That’s it. That’s 80% of React. Stop tutorial hopping. Build a todo app. Build a weather app. The concepts will stick when you BUILD. 🛠️ Which React concept confused you the most? 👇 #ReactJS #JavaScript #FrontendDev #WebDevelopment #ReactHooks #LearnReact #CodeNewbie #FresherLife #TechEducation #UIDesign #BuildInPublic #TechCareers

"useEffect" vs. "useLayoutEffect": Are you using the right React hook? 🤔 In React, both "useEffect" and "useLayoutEffect" manage side effects, but their timing is what sets them apart—and choosing the wrong one can impact your app's performance. Here's a quick breakdown: "useEffect" - Timing: Runs asynchronously after the component renders and the browser has painted the screen. Performance: Non-blocking. It won’t slow down the user interface, making it perfect for most side effects. Best For: Fetching data from an API Setting up subscriptions Managing timers "useLayoutEffect" - Timing: Runs synchronously after all DOM mutations but before the browser paints the screen. Performance: Can block the rendering process. Use it sparingly to avoid a sluggish UI. Best For: Reading layout from the DOM (e.g., getting an element's size or position). Making immediate visual updates based on those measurements to prevent flickering. The Golden Rule 🏆 Always start with "useEffect". Only switch to "useLayoutEffect" if you are measuring the DOM and need to make synchronous visual updates before the user sees the changes. Understanding this distinction is crucial for building performant and seamless React applications. #ReactJS #WebDevelopment #JavaScript #FrontEndDev #Performance #CodingTips #ReactHooks

🧠 Why key Can Reset Your Entire Component State Most people think key is just for lists. It’s not. 👉 It can force React to destroy and recreate a component. 🔍 Example function App() { const [id, setId] = useState(1); return ( <> <button onClick={() => setId(id + 1)}>Next</button> <Profile key={id} /> </> ); } What happens? Every time id changes: 👉 React sees a new key 👉 It unmounts old component 👉 It creates a new one 💥 Result Inside Profile: const [count, setCount] = useState(0); 👉 count resets to 0 every time 🧠 Why? Because React thinks: “This is a completely new component” 🎯 Real use case You can use this intentionally: Reset form state Restart animations Clear component data 💥 Hidden danger Using unstable keys (like Math.random() or index) 👉 Can cause unexpected resets 👉 Leads to weird bugs 🧠 Final Insight key doesn’t just help React track elements It controls component identity #ReactJS #FrontendDevelopment #JavaScript #ReactTips #WebDevelopment #CleanCode #LearningInPublic

Recently, I revisited some of my earlier React projects and decided to finally share them. Here are a few projects I built while learning: 🔹 To-Do List App A modern task manager with drag-and-drop, dark mode, filtering, and local storage support. 🔹 Weather Dashboard Fetches real-time weather data (temperature, wind speed, conditions) using OpenWeather API. 🔹 FlipMind A card-matching game with smooth animations and responsive design. 🔹 QuoteCraft A minimal quote generator with a clean and simple UI. These projects helped me strengthen my fundamentals in React, state management, and working with APIs. Links are in the comments 👇. #React #WebDevelopment #FrontendDevelopment #JavaScript #LearningJourney

🪝: Our app was slow. Users were complaining. Here's the 5 things that fixed it (and the 1 thing that almost made it worse). Performance optimisation is one of those things that sounds abstract until you have actual users complaining. Here's what I've done in real projects that actually moved the needle: 1. CODE SPLITTING with React.lazy() → Don't load the whole app on first visit → Lazy load routes and heavy components → Real impact: cut initial load time by ~40% on a large project 2. MEMOISATION — but only where it matters → React.memo() for components that receive the same props often → useMemo() for expensive calculations → useCallback() for functions passed as props → WARNING: Over-memoising adds overhead. Profile first, optimise second. 3. OPTIMISED RENDER CYCLES → Identify what's causing unnecessary re-renders (React DevTools Profiler is your best friend) → Move state as close to where it's used as possible → Avoid storing derived data in state — calculate it 4. IMAGE OPTIMISATION → Lazy load images below the fold → Use appropriate formats (WebP where possible) → Set explicit width/height to avoid layout shifts 5. BUNDLE ANALYSIS → Use webpack-bundle-analyzer or Vite's rollup-plugin-visualizer → You'll be shocked what's in your bundle sometimes The thing that almost made it worse? Premature memoisation everywhere. We wrapped every component in React.memo before profiling. It actually slowed things down. MEASURE. THEN OPTIMISE. What's your go-to performance trick? #ReactJS #PerformanceOptimisation #FrontendDev #JavaScript #WebPerformance #CodeSplitting #ReactHooks

🎬 Built a Movie Explorer App using React I’ve been working on a project where I built a Movie Explorer App from scratch using React, and it’s been a great learning experience 🚀 🔧 Features I implemented: • Fetching real-time movie data from an API • Search functionality with debouncing • Displaying trending and popular movies • Dynamic rendering using reusable components • Clean and responsive UI 💡 What I learned: Working on this project helped me understand how to manage state, handle API calls efficiently, and structure components in a scalable way Projects like this are helping me strengthen my frontend fundamentals step by step 💪 GitHub Link: https://lnkd.in/gUEP47MQ More improvements coming soon… #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #Projects #LearningInPublic

If you build things with React and care about how they look and feel, you need to know about React Bits. It's a free, open-source library of 110+ animated, interactive UI components built specifically for creative developers. Think polished text animations, dynamic backgrounds, glowing borders, and all the little details that make a site feel alive rather than just functional. What makes it genuinely useful (not just pretty) is how it's set up. Every component comes in 4 variants: JavaScript or TypeScript, CSS or Tailwind, so it just slots into however you already work. No fighting with the stack, just copy, paste, tweak props, and you're done. On top of the components, there are free creative tools built in: a Background Studio for generating and exporting animated backgrounds, a Shape Magic tool for those satisfying inner-rounded corner effects, and a Texture Lab that applies noise, dithering, and ASCII effects to images and video. The project is maintained by David Haz and has picked up 38k+ GitHub stars, which honestly says a lot about how much people actually find it useful vs. just starring and forgetting. Whether you're building a portfolio, a SaaS landing page, or just want your side project to stop looking like a template, this is a solid starting point. Tool: reactbits.dev Repo: https://lnkd.in/gu9eTHD6 #WebDevelopment #Frontend #React #UIDesign

Gamifying React: Building an Idle Clicker 🎮💰 Can you build a high-performance game engine using standard web technologies? I took on the challenge with my latest project: Idle Clicker. While it looks like a fun game, under the hood, it’s a masterclass in state management and performance optimization: 🔹 Dynamic Scaling: Implemented mathematical formulas to handle exponential growth for upgrades and costs. 🔹 Performance First: Managed rapid state updates (clicks + auto-income) without causing UI lag, ensuring a smooth 60fps experience. 🔹 React Logic: Utilized hooks and custom logic to bridge the gap between "web app" and "game engine." This project proves that whether it's a data dashboard or a game, I focus on building responsive, logic-driven systems that keep users engaged. 🔗 Try it here (Warning: Addictive): https://lnkd.in/dVbqD6Aj #ReactJS #GameDev #WebDevelopment #Logic #JavaScript #Frontend #CodingChallenge #InteractiveDesign