Introducing useActionState in React 19 for smoother UX

If you hide a component using {isVisible && <Component />}, React removes it from the tree, so you lose its state. If you hide it with CSS (display: none), it stays mounted, meaning timers and effects keep running, which hurts performance. Now with <Activity />, React offers a smarter approach: The UI is hidden. The component’s state remains intact. Background work (timers, subscriptions, etc.) is automatically paused. 👉 Think of it like browser tabs — when you switch tabs, the inactive one pauses but keeps its data safe, so when you return, it picks up right where you left off. ⚡ Perfect for: • Tabbed interfaces • Multi-step forms • Complex UIs where hidden parts should pause, not reset #React #ReactJS #ReactDevelopers #WebDevelopment #Frontend #FrontendDevelopment #JavaScript #Coding #Programming #WebDev #SoftwareEngineering #UIUX #CodeTips #DevCommunity #CleanCode #WebDesign #TechTips #DeveloperLife #ReactHooks #ReactComponents

Understanding Props & Default Props in React: In React, props (properties) are one of the core concepts that help components communicate with each other. They make our components dynamic, reusable, and flexible. What are props? * Props allow us to pass data from a parent component to a child component. * They are read-only, meaning a child component cannot modify them directly. Example: function Child(props) { return <h3>Hello, {props.name}!</h3>; } function Parent() { return <Child name="React Developer" />; } What are default props? * Default props provide fallback values when no prop is passed from the parent. * This ensures the component still renders without errors. Example: function Greeting({ name }) { return <p>Welcome, {name}!</p>; } Greeting.defaultProps = { name: "Guest", }; If no name is provided, React automatically uses “Guest”. Why Do They Matter? ✔ Improve component reusability ✔ Avoid undefined or missing values ✔ Make applications predictable and consistent ✔ Enhance code readability and maintainability In short: Props = Data passed to a component Default Props = Backup values for props KGiSL MicroCollege #React #JavaScript #WebDevelopment #Frontend #FullStack #Programming #Coding #SoftwareEngineering #ReactJS #DeveloperCommunity #LearningJourney #TechSkills #CodeNewbie #WomenInTech #MERN #UI #UX #FrontEndDeveloper #JSX #ReactTips #ReactDeveloper #CleanCode #ComponentBasedArchitecture #DefaultProps #PropsInReact #LinkedInLearning #DailyLearning #CodeLife #SoftwareDeveloper #WebTech #SkillUp #TechJourney #DeveloperLife #ReactHooks #FrontendSkills #Programmer

I was exploring React’s rendering behavior and the execution of useEffect in parent-child components, and it’s fascinating how the flow actually works. Consider this example: function Child() { const [count, setCount] = React.useState(0); React.useEffect(() => { console.log("Child useEffect running"); setCount(c => c + 1); }, []); console.log("Child rendering", count); return <div>I am Child</div>; } function Parent() { const [count, setCount] = React.useState(0); React.useEffect(() => { console.log("Parent useEffect running"); setCount(c => c + 1); }, []); console.log("Parent rendering", count); return ( <div> I am Parent <Child /> </div> ); } When you run this, you might see something like: Parent rendering count 0 Child rendering count 0 Child useEffect running Parent useEffect running Parent rendering count 1 Child rendering count 1 Notice a few things: First, React always renders the parent before the child. So the render logs appear top-down. Second, useEffect runs after the render phase, and interestingly, the child’s effect runs before the parent’s effect in the commit phase. Third, when useEffect calls setState, React batches updates and schedules a re-render. In the next render pass, both parent and child see the updated state. This simple behavior highlights how rendering and effects work separately. Render happens top-down, effects run bottom-up, and state updates are applied before the next render starts. I’d love to hear from the community: have you seen confusing behaviors like this when working with nested components or Strict Mode? How do you handle understanding and debugging state updates in complex React #ReactJS #JavaScript #FrontendDevelopment #WebDevelopment #ReactHooks #useEffect #ReactTips #Programming #WebDev #DeveloperLife #Coding #FrontendTips #ReactPatterns #StateManagement #TechCommunity

⚛️ React Component Lifecycle — the hidden rhythm behind every UI. Every React component has a journey — from being created, shown, updated, and finally removed. Understanding this lifecycle helps you write cleaner, faster, and more predictable React code. --- 🧩 What is the Component Lifecycle? The lifecycle represents different stages a component goes through during its existence — like Mounting, Updating, and Unmounting. Each stage gives us hooks (or class methods) to run code at just the right moment. --- 🔹 1. Mounting — This is when your component first appears on the screen. You usually fetch data, set up event listeners, or initialize states here. In React hooks: useEffect(() => { console.log("Component mounted!"); }, []); --- 🔹 2. Updating — When something changes. Whenever props or state update, React re-renders your component. You can track or respond to these changes here. In hooks: useEffect(() => { console.log("Component updated!"); }); --- 🔹 3. Unmounting — When the component says goodbye. When the component is removed from the DOM — clean up everything here: cancel API calls, remove listeners, clear timers, etc. In hooks: useEffect(() => { return () => console.log("Component unmounted!"); }, []); --- 💡 Why does it matter? ⚙️ Performance — Run logic only when needed. 🧹 Clean Side Effects — Avoid memory leaks or unwanted API calls. 🔍 Debugging — Know when and why your component re-renders. 🧠 Deeper React Insight — Understand how your app truly “lives” on the browser. --- React’s lifecycle isn’t just theory — it’s the heartbeat of every interactive experience. Once you understand it, your components won’t just work — they’ll feel alive 💙 #react #javascript #frontend #webdevelopment #coding #learning

React 19 introduces some truly game-changing features that make UI rendering and side effects faster, smoother, and more predictable. 1: <Activity /> — Smarter Rendering Control Tired of losing component state when switching between sections or tabs? <Activity /> lets you hide parts of your UI without unmounting them. ✅ Why it matters: Keeps hidden components mounted Preserves state (no reset on re-render) Perfect for tab navigation, modals, and multi-step forms 2: useEffectEvent — Stable & Reliable Effects Managing effects that depend on changing props or state often causes unwanted re-renders or stale closures. With useEffectEvent, React now separates event logic from effect logic, making them more stable and predictable. ✅ Why it’s powerful: No more stale data in effects Prevents unnecessary effect re-runs Keeps ESLint dependency rules intact <Activity /> → Keeps hidden components alive and stateful useEffectEvent → Prevents effect chaos and ensures stability #React #React19 #ReactJS #ReactHooks #JavaScript #WebDevelopment #FrontendDevelopment #Frontend #WebDev #Coding #Programming #DevCommunity #SoftwareEngineering #WebApps #Hooks

🚀 𝗨𝗻𝗱𝗲𝗿𝘀𝘁𝗮𝗻𝗱𝗶𝗻𝗴 𝗥𝗲𝗮𝗰𝘁’𝘀 𝗥𝗲𝗻𝗱𝗲𝗿 & 𝗖𝗼𝗺𝗺𝗶𝘁 𝗣𝗿𝗼𝗰𝗲𝘀𝘀 React’s render and commit process is crucial for performance and predictable UI behavior. Here’s a quick breakdown: 1️⃣ Render and Commit Process – React first “renders” components (calculates UI) and then “commits” changes to the DOM. 2️⃣ Initial Render – Triggered using createRoot and root.render(<Component />) for the first time. 3️⃣ Re-renders on State Update – Changing state with setState triggers a re-render automatically. 4️⃣ React Renders Components Recursively – Each component is called individually to determine what to display. 5️⃣ Pure Rendering – Components should be pure functions: same input → same output. Impure functions can cause bugs. 6️⃣ Strict Mode – Helps identify impure functions by rendering components twice in development. 7️⃣ React Commits DOM Changes – Only updates the parts of the DOM that changed, avoiding unnecessary work. 8️⃣ No DOM Changes for Same JSX – If the JSX output doesn’t change, React skips updating the DOM. 9️⃣ Browser Paint – After React updates the DOM, the browser repaints the screen automatically. 🔟 Optimize Performance – Understanding this flow helps you leverage React.memo or similar techniques to minimize unnecessary renders. 💡 Takeaway: Knowing when and how React renders makes it easier to build fast and reliable apps. #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #ReactTips #WebDeveloper #Coding #TechLearning #DeveloperCommunity #ReactHooks #Programming

React has grown beyond just “a UI library.” Modern React development isn’t just about components anymore. It’s about architecture: Hooks that make complex logic reusable Server & client boundaries (with frameworks) Lightweight state management with tools like useReducer or context Optimizing rendering & avoiding re-renders for performance gains The best React apps today are: ✅ Modular ✅ Performant ✅ Easy to scale A clean component tree + smart state strategy can make more difference than any “fancy optimization.” #ReactJS #WebDevelopment #JavaScript #Frontend #WebDev #DeveloperLife #Programming #UI #TechTrends #React

⚛️ React 19 just made async UI feel effortless. One feature I’m really enjoying is useOptimistic — a tiny hook that totally changes how we handle “instant feedback” in the UI. Instead of waiting for a server response, you update the interface immediately, and React quietly syncs things in the background. The result: interfaces that feel fast, smooth, and intentional. Here’s a quick example: Small hook, big improvement in UX. React 19 feels like a quality-of-life upgrade for real-world apps. #reactjs #javascript #frontend #webdevelopment #programming #reacthooks #cleancode

“𝗜𝘀 𝗥𝗲𝗱𝘂𝘅 𝘀𝘁𝘂𝗽𝗶𝗱? 𝗪𝗵𝘆 𝗰𝗮𝗻’𝘁 𝗺𝘆 𝗥𝗲𝗱𝘂𝘅 𝗿𝗲𝗱𝘂𝗰𝗲𝗿 𝗷𝘂𝘀𝘁 𝗰𝗵𝗮𝗻𝗴𝗲 𝘁𝗵𝗲 𝘀𝘁𝗮𝘁𝗲 𝗱𝗶𝗿𝗲𝗰𝘁𝗹𝘆?” I’ll admit it: the first time I used Redux, I thought the rules seemed… strange.  “𝘞𝘩𝘺 𝘤𝘢𝘯’𝘵 𝘮𝘺 𝘳𝘦𝘥𝘶𝘤𝘦𝘳 𝘫𝘶𝘴𝘵 𝘤𝘩𝘢𝘯𝘨𝘦 𝘵𝘩𝘦 𝘴𝘵𝘢𝘵𝘦 𝘥𝘪𝘳𝘦𝘤𝘵𝘭𝘺? 𝘐𝘴𝘯’𝘵 𝘵𝘩𝘢𝘵 𝘵𝘩𝘦 𝘸𝘩𝘰𝘭𝘦 𝘱𝘰𝘪𝘯𝘵?” Turns out, Redux isn’t stupid. Here’s the real reason: 👉 Redux depends on immutability to know something changed. When you mutate the existing state, Redux simply can’t detect it, because it uses shallow comparisons, not deep ones. In simple words: 🔗 It compares links, not values. So unless your reducer returns a new object reference, Redux has no signal that anything changed… …and your UI won’t update. If you mutate the old state: ❌ React might not re-render ❌ Debugging becomes guesswork ❌ Time-travel devtools break ❌ State history becomes impossible ❌ Performance optimizations fail 𝗔𝗻𝗱 𝗶𝗳 𝗶𝗺𝗺𝘂𝘁𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝗳𝗲𝗲𝗹𝘀 𝗽𝗮𝗶𝗻𝗳𝘂𝗹? 👉 Redux Toolkit (RTK) uses Immer, so you can write “mutating” code, and it safely produces an immutable update behind the scenes. The end result: cleaner reducers, fewer bugs, faster debugging. Redux isn’t stupid, it’s strict for a reason, you just need to understand the logic behind it) #redux #reactjs #frontend #javascript #webdevelopment #reactdevelopment #reduxstate #immutability #frontendtips #codingjourney #learninpublic

🎲 Built a Random Number Generator using React Class Components! I'm exploring how state works in React and how components re-render dynamically. ⚡ What I learned today: 🔸 Updating state using setState 🔸 Generating dynamic values with Math.random() 🔸 Writing clean & structured class components 🔸 Styling components for a smooth UI ✨ ✨ Features: ✔ Generates a new random number instantly 🎰 ✔ Clean & simple UI ✔ Great practice for understanding React re-rendering Excited to continue improving and building more interactive components! 💻🔥 #ReactJS #Frontend #WebDevelopment #LearningJourney #JavaScript Meghana M 10000 Coders