React-Slick Mobile Layout Issue on First Load

💡 Today I Learned How React’s Virtual DOM Improves Performance One of the key reasons React is fast and efficient is because of the Virtual DOM. But what exactly is it? The Virtual DOM is a lightweight JavaScript representation of the real DOM. Instead of updating the browser’s DOM directly every time something changes, React first updates the Virtual DOM. ⚙️ How it works: 1️⃣ When a component’s state or props change, React creates a new Virtual DOM tree. 2️⃣ React compares the new Virtual DOM with the previous one. 3️⃣ This comparison process is called Reconciliation (also known as diffing). 4️⃣ React identifies only the parts that changed. 5️⃣ Finally, React updates only those specific elements in the real DOM. 🚀 Why this is powerful: ✔ Reduces unnecessary DOM manipulations ✔ Improves application performance ✔ Makes UI updates faster and more efficient ✔ Helps build highly dynamic user interfaces Instead of re-rendering the entire page, React intelligently updates only what is needed. Understanding concepts like Virtual DOM and Reconciliation helps developers write more efficient React applications and better understand how rendering works behind the scenes. Still exploring the deeper side of React and modern frontend development. #ReactJS #FrontendDeveloper #WebDevelopment #JavaScript #LearningInPublic #MERNStack

💡 Today I Learned How React’s Virtual DOM Improves Performance One of the key reasons React is fast and efficient is because of the Virtual DOM. But what exactly is it? The Virtual DOM is a lightweight JavaScript representation of the real DOM. Instead of updating the browser’s DOM directly every time something changes, React first updates the Virtual DOM. ⚙️ How it works: 1️⃣ When a component’s state or props change, React creates a new Virtual DOM tree. 2️⃣ React compares the new Virtual DOM with the previous one. 3️⃣ This comparison process is called Reconciliation (also known as diffing). 4️⃣ React identifies only the parts that changed. 5️⃣ Finally, React updates only those specific elements in the real DOM. 🚀 Why this is powerful: ✔ Reduces unnecessary DOM manipulations ✔ Improves application performance ✔ Makes UI updates faster and more efficient ✔ Helps build highly dynamic user interfaces Instead of re-rendering the entire page, React intelligently updates only what is needed. Understanding concepts like Virtual DOM and Reconciliation helps developers write more efficient React applications and better understand how rendering works behind the scenes. Still exploring the deeper side of React and modern frontend development. #ReactJS #FrontendDeveloper #WebDevelopment #JavaScript #LearningInPublic #MERNStack

🚀 React Re-Render 🔄 One of the most important concepts in React is Re-rendering. 1️⃣ What is Re-render? Re-render means: 👉 React updates the UI when state or props change 2️⃣ Simple Example function Counter() { const [count, setCount] = useState(0); return ( <button onClick={() => setCount(count + 1)}> {count} </button> ); } 👉 When you click the button: setCount updates state React re-renders the component UI updates with new value 3️⃣ What triggers Re-render? ✔ State change (useState) ✔ Props change ✔ Parent re-render 4️⃣ Important Myth ❌ 👉 “React reloads the whole page” 🚫 WRONG React only updates the changed parts of the UI using: 👉 Virtual DOM 5️⃣ Behind the Scenes State changes React creates new Virtual DOM Compares with old one (Diffing) Updates only changed elements 👉 This process is called Reconciliation 6️⃣ Problem: Unnecessary Re-renders 😬 Sometimes components re-render even when not needed. Example: <Child /> Even if props didn’t change, it may re-render when parent updates. 7️⃣ Solution ✅ Use: 👉 React.memo 👉 useMemo 👉 useCallback To optimize performance. 🔥 Key Takeaway Re-render is NOT bad ❌ Unnecessary re-render is the real problem ⚠️ #React #JavaScript #Frontend #WebDevelopment #LearningByDoing

🚀 Excited to share my latest project: QR Code Generator built using React and Vite! This simple web application allows users to generate a QR code from any URL and download it instantly. 🔹 Key Features: • Generate QR codes from any URL • Input validation with error handling • Instant QR preview • Download QR code as PNG • Responsive UI design 🛠 Tech Stack: React | JavaScript | Vite | CSS | QRCode npm package Working on this project helped me strengthen my understanding of React state management, conditional rendering, and UI design. 🔗Link : https://lnkd.in/g6EUzh2F 🔗 GitHub Repository: https://lnkd.in/gmV7AiWi I’m continuously learning and building projects to improve my frontend development skills. #React #JavaScript #FrontendDevelopment #WebDevelopment #LearningInPublic #ReactJS

POV: The Virtual DOM carries, you take the credit. 🤫😎 Have you ever wondered why apps built with React feel so smooth, even when the UI updates frequently? The secret lies in something called #DOM. Let's break it down in the simplest way possible. First, What is DOM? - DOM (Document Object Model) is basically a tree structure of your web page. 1. Traditional JavaScript 🐢 - When we make changes using plain JavaScript, the browser updates the entire section of the Real DOM. This process is slow and 'expensive' for performance. Think of it like repainting the entire house just to change a lightbulb. 2. The React Way: The Virtual DOM ⚡ - React uses a lightweight copy of the Real DOM, which is stored in memory. This is the Virtual DOM. The Process: a) In React, whenever we update something, it’s reflected in the Virtual DOM first. b) It then compares this updated copy with its previous version (this smart process is called Diffing). c) Finally, React updates only the parts that changed in the Real DOM. The Result: ✅ Faster performance ✅ Zero unnecessary updates #ReactJS #JavaScript #WebDevelopment #Frontend #CodingTips #TechCommunity #CodeCanvas

🚀 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

𝗠𝗼𝘀𝘁 𝗥𝗲𝗮𝗰𝘁 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿𝘀 𝗢𝘃𝗲𝗿𝘂𝘀𝗲 𝘂𝘀𝗲𝗦𝘁𝗮𝘁𝗲 Not everything in React needs to be state. But many developers still store everything in useState. That leads to: • Unnecessary re-renders • Extra complexity • Harder-to-maintain components Here’s a simple way to think about it: 👉 If it affects the UI → use state 👉 If it doesn’t → use useRef useRef lets you store values across renders without triggering a re-render. This makes it perfect for things like: • Storing timers • Tracking previous values • Accessing DOM elements • Keeping mutable values Using state where a ref is enough is a common mistake. And over time, it impacts performance and code clarity. 👇 Simple comparison below Day 20/100 — sharing practical frontend engineering lessons. Do you usually default to state or think before choosing? #ReactJS #FrontendEngineering #JavaScript #WebDevelopment #SoftwareEngineering

How React Remembers State Between Renders? When a component re-renders, the function runs again from top to bottom. So how does useState not reset every time? 🤔 function Counter() { const [count, setCount] = React.useState(0); return <button onClick={() => setCount(count + 1)}>{count}</button>; } Every render: The function runs again and Variables are recreated. So why doesn’t count go back to 0? What Actually Happens Internally React stores state outside the component function. Behind the scenes: 1) Each component has a Fiber node 2) React keeps a linked list of Hooks 3) It tracks Hooks based on call order State is not stored in your function. It’s stored in React’s internal Fiber system. The function is just a way for React to describe UI. Understanding this makes Hooks feel much less magical. #ReactJS #ReactInternals #ReactHooks #FrontendDevelopment #SoftwareEngineering #JavaScript

I built the tool I needed for my Web Component library. 🚀 If you’ve ever built a Web Component library, you know the struggle: How do you show your users that your components work seamlessly in React, Angular, Vue, and Lit without the overhead of a massive monorepo? I needed a way to provide instant, editable demos that just work. So, I built UWC Playground. It’s an in-browser codepen specifically for showcasing how components behave across the ecosystem. What makes it a game-changer for library authors? 🛠️ Multi-Framework Side-by-Side: One playground to compare how your custom elements handle props/attributes in React vs. Angular vs. Vue. ⚡ Embedded Demos: Use the <uwc-render> tag in your documentation. It feels as light as a static image but provides a full, live-coding experience. 🧩 Real Compilation: No "smoke and mirrors." TypeScript and SCSS are compiled in a Web Worker, ensuring your users see exactly how the code will perform in production. 🔗 Server-to-Playground: Use the Form POST API to generate a pre-filled playground session directly from your docs or a server-rendered page. Stop shipping static code snippets. Start shipping interactive experiences. 👇 Check the first comment for the link to try it out! #WebComponents #DesignSystems #StencilJS #LitElement #React #Angular #Vue #FrontendDev

𝐑𝐞𝐚𝐜𝐭 useCallback 𝐢𝐬𝐧'𝐭 𝐣𝐮𝐬𝐭 𝐚𝐛𝐨𝐮𝐭 𝐩𝐫𝐞𝐯𝐞𝐧𝐭𝐢𝐧𝐠 𝐧𝐞𝐰 𝐟𝐮𝐧𝐜𝐭𝐢𝐨𝐧𝐬 𝐨𝐧 𝐞𝐯𝐞𝐫𝐲 𝐫𝐞𝐧𝐝𝐞𝐫. 𝐈𝐭'𝐬 𝐚𝐛𝐨𝐮𝐭 𝐫𝐞𝐟𝐞𝐫𝐞𝐧𝐜𝐞 𝐞𝐪𝐮𝐚𝐥𝐢𝐭𝐲, 𝐚𝐧𝐝 𝐢𝐠𝐧𝐨𝐫𝐢𝐧𝐠 𝐢𝐭 𝐜𝐚𝐧 𝐬𝐢𝐥𝐞𝐧𝐭𝐥𝐲 𝐤𝐢𝐥𝐥 𝐲𝐨𝐮𝐫 𝐚𝐩𝐩'𝐬 𝐩𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞. If you're passing a function down to a React.memo-wrapped child component, and that function is defined inline, guess what? Your memoized child is re-rendering anyway. ```jsx // Parent component function Parent() { const [count, setCount] = useState(0); // This creates a new function on every Parent re-render // Even if Child is memoized, its props change by reference const handleClick = () => setCount(count + 1); return ( <div> <MemoizedChild onClick={handleClick} /> <p>Count: {count}</p> </div> ); } // Child component (memoized) const MemoizedChild = React.memo(({ onClick }) => { console.log('MemoizedChild re-rendered'); // This will log! return <button onClick={onClick}>Increment</button>; }); ``` The `handleClick` function is a new object in memory each time Parent renders, breaking React.memo's prop comparison. The Fix: Wrap your function in useCallback. ```jsx // Parent component function Parent() { const [count, setCount] = useState(0); // Now, handleClick's reference is stable across renders // as long as 'count' (its dependency) doesn't change const handleClick = useCallback(() => setCount(count + 1), [count]); return ( <div> <MemoizedChild onClick={handleClick} /> <p>Count: {count}</p> </div> ); } ``` This ensures the `onClick` prop maintains the same reference unless its dependencies change, allowing React.memo to do its job effectively. It's a subtle but crucial distinction for optimizing larger React applications. Are you meticulously optimizing these prop references, or do you wait until performance bottlenecks emerge? Let me know your strategy! #React #Performance #WebDevelopment #JavaScript #Frontend