React: UI is a function of state

🚀 Day 1 of sharing daily dev learnings Today’s topic: React Performance ⚡ Problem: My page was re-rendering too many times. Even small state changes were slowing the UI. Mistake: I was recalculating heavy data on every render. Fix: Used useMemo to memoize derived values. Example: const filtered = useMemo(() => { return users.filter(u => u.active) }, [users]) Result: ✅ Faster renders ✅ Smoother UI ✅ Cleaner logic Lesson: Don’t optimize everything. Optimize expensive computations only. Small React improvements like this make a BIG difference in production apps. What’s one React optimization you use often? 👇 #ReactJS #Frontend #WebDevelopment #JavaScript #100DaysOfCode

🚀 𝗭𝘂𝘀𝘁𝗮𝗻𝗱: 𝗦𝗶𝗺𝗽𝗹𝗲 𝗦𝘁𝗮𝘁𝗲 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗳𝗼𝗿 𝗥𝗲𝗮𝗰𝘁 Zustand is a 𝗹𝗶𝗴𝗵𝘁𝘄𝗲𝗶𝗴𝗵𝘁 𝗮𝗻𝗱 𝗲𝗮𝘀𝘆-𝘁𝗼-𝘂𝘀𝗲 𝘀𝘁𝗮𝘁𝗲 𝗺𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗹𝗶𝗯𝗿𝗮𝗿𝘆 for React and React Native. It removes the complexity of Redux by letting you:  • Create a global store with very little code  • Update state directly (no reducers or actions)  • Use state anywhere without wrapping your app in Providers Zustand works great for 𝗰𝗹𝗶𝗲𝗻𝘁-𝘀𝗶𝗱𝗲 𝘀𝘁𝗮𝘁𝗲 like authentication, themes, UI flags, and form data. If you want something 𝘀𝗶𝗺𝗽𝗹𝗲𝗿 𝘁𝗵𝗮𝗻 𝗥𝗲𝗱𝘂𝘅 but 𝗺𝗼𝗿𝗲 𝗽𝗼𝘄𝗲𝗿𝗳𝘂𝗹 𝘁𝗵𝗮𝗻 𝗖𝗼𝗻𝘁𝗲𝘅𝘁, Zustand is definitely worth trying. Clean code. Better performance. Less headache. 🙌 #React #ReactNative #Zustand #FrontendDevelopment #JavaScript

⚛️ React Day 9 – Understanding useReducer Hook 🚀 Today, I learned how to manage complex state logic in React using the useReducer hook. 🔹 What is useReducer? useReducer is an alternative to useState that is better suited for handling complex state transitions. It works by using a reducer function that decides how the state should change based on dispatched actions. 💡 What I learned: • How state and actions work together   • How to define a reducer function   • How to dispatch actions to update state   • Why useReducer is useful for complex UI logic   • How it relates to Redux concepts  In simple words: 👉 useReducer = state management using actions and a central update function. Understanding useReducer helped me see how scalable React applications structure their state updates more predictably. Still learning and building step by step ⚛️🚀 #React #ReactJS #useReducer #StateManagement #FrontendDevelopment #LearningJourney #WebDevelopment #JavaScript

One important concept every React developer must truly understand: State management In React, state is what drives your user interface. It determines what users see, how components update, and how data flows across your application. Poor state management leads to: • unpredictable UI behavior • unnecessary re-renders • hard-to-maintain code But when state is handled correctly using tools like useState, useEffect, lifting state up, or Context your application becomes cleaner, more scalable, and easier to reason about. React development isn’t just about building components. It’s about thinking in state and data flow. Still learning. Still building. #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #SoftwareEngineering #LearningInPublic

React 19 is shaping up to be a big shift toward async-first UI development 🚀 This slide perfectly sums up the Async Revolution in React: 🔹 use() hook – consume promises directly in render and let React handle suspension 🔹 Action Hooks – simplify form handling with built-in pending & error states 🔹 <Activity /> – preserve UI state without unnecessary work 🔹 useEffectEvent – clean separation of reactive vs non-reactive logic Overall takeaway 👉 less boilerplate, better performance, and more predictable async behavior. If you’re already using Suspense, Next.js, or server components, React 19 will feel like a natural evolution rather than a rewrite. Frontend is clearly moving toward declarative async by default, and React is leading that charge 💙 #React19 #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #AsyncProgramming #Suspense #NextJS #UIEngineering #SoftwareEngineering #TechUpdates #DeveloperCommunity

React roadmaps that make you build real apps and become a cracked dev. I have been getting a lot of questions about the roadmap I followed, and here's it. Before React, lock in: - JavaScript (closures, async/await, array methods) - HTML semantics - CSS layout (Flexbox, Grid) If your JS is weak, React will always feel confusing. Master the basics properly: - Components & JSX - Props vs State - useState, useEffect - Conditional rendering - Lists & keys Then you Learn how to: - Break UIs into components - Lift state when needed - Avoid prop drilling (without overusing libraries) - Control re-renders intentionally If you can’t explain why something re-renders, you’re not done yet. Now level up with: - Forms & validation - Data fetching - Error & loading states - Custom hooks - Basic performance optimizations Build ugly but functional apps. That’s where growth happens. #reactdev #frontend #BuildinPublic #BuildinginPublic #code

🔥 Why Most React Apps Break at Scale React isn’t hard. Unclear responsibility is. When components handle: state + effects + logic + UI they become impossible to reason about. That’s why custom hooks matter. Custom hooks: • move behavior out of components • keep UI clean and readable • make logic predictable • help apps scale without chaos Components should show what users see. Hooks should define how things work. If a component reads easily, your architecture is improving. Clean React isn’t clever — it’s intentional. #ReactJS #CustomHooks #FrontendDevelopment #WebDevelopment #JavaScript #CleanCode #DeveloperMindset

⚛️ What are Hooks in React? Hooks are functions that let you use React features like state, lifecycle, and context inside functional components—without writing class components. Before Hooks, state and lifecycle logic were only possible in class components. Hooks made functional components more powerful, cleaner, and reusable. Common Hooks: useState → Manage component state useEffect → Handle side effects (API calls, subscriptions) useContext → Access context easily useRef → Access DOM elements or persist values useMemo / useCallback → Performance optimization ✅ Cleaner and more readable code ✅ Reusable logic via custom hooks ✅ No need for class components Hooks are one of the biggest reasons modern React apps are simpler, faster, and easier to maintain. #React #Hooks #JavaScript #UI #FrontendDevelopment #ReactJS

React performance problems rarely come from large data or complex UI. They come from incorrect state flow. One of the most common mistakes: Using useEffect as “code that runs after render”. useEffect is not a lifecycle shortcut. It’s a side-effect synchronizer. A small dependency mistake can silently create: render → fetch → setState → render loops No errors. No warnings. Just slow apps. Production-ready React code follows simple rules: • One effect = one responsibility • Dependencies represent real triggers • Stable references matter more than clever logic Before writing a hook, ask: “What exact change should trigger this logic?” Good React code doesn’t look smart. It looks boringly predictable. That’s why it scales. #ReactJS #ReactHooks #FrontendEngineering #WebDevelopment #CleanCode #Performance

Hey everyone — excited to share a small project I built: News App 📰✨ A lightweight React + Vite starter that shows news-style articles with a clean, component-driven UI. Click any article to open a detailed view, tweak components in seconds with hot-reload, and extend it to fetch real news APIs or add routing. What you’ll love: ⚡ Fast dev feedback with Vite + HMR 🧩 Simple, reusable components (Header, Navbar, SelectedArticle, Footer) 🎨 Clean styling with plain CSS — easy to customize 🛠️ Ready to connect to any news API or add React Router / TypeScript I built this to be a friendly starting point for developers learning component design and API integration. If you’re curious, grab the code, open a PR, or file an issue — contributions and suggestions are welcome 🙌 GitHub: https://lnkd.in/dYHPvZXu live demo:The API used in this app is not for commercial use. It can only run on localhost, which is why a live demo of this app is not available. If you try it, drop a comment with what feature you'd add next — live updates, dark mode, or a NewsAPI integration? Let’s build it together! 🚀 #React #Vite #OpenSource #WebDev #JavaScript #NewsApp