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𝐓𝐨𝐝𝐚𝐲 𝐈 𝐥𝐞𝐯𝐞𝐥𝐞𝐝 𝐮𝐩 𝐦𝐲 𝐑𝐞𝐚𝐜𝐭 𝐬𝐤𝐢𝐥𝐥𝐬 𝐛𝐲 𝐢𝐦𝐩𝐥𝐞𝐦𝐞𝐧𝐭𝐢𝐧𝐠 𝐬𝐦𝐨𝐨𝐭𝐡, 𝐟𝐥𝐢𝐜𝐤𝐞𝐫-𝐟𝐫𝐞𝐞 𝐩𝐚𝐠𝐢𝐧𝐚𝐭𝐢𝐨𝐧 𝐮𝐬𝐢𝐧𝐠 𝐑𝐞𝐚𝐜𝐭 𝐐𝐮𝐞𝐫𝐲! I was exploring how to load API data page-by-page without the UI blinking or resetting and React Query’s 𝒌𝒆𝒆𝒑𝑷𝒓𝒆𝒗𝒊𝒐𝒖𝒔𝑫𝒂𝒕𝒂 feature completely changed the game for me. 🔥 What I Built - Dynamic Pagination using useState - Data Fetching with useQuery - Personalized API calls using pageNumber - Smooth transitions using keepPreviousData - Clean, minimal UI for posts + pagination buttons - Proper error & loading handling What I Learned 🔹 React Query refetches only when queryKey changes → ["posts", pageNumber] 🔹 queryFn should always be a function → () => FetchPosts(pageNumber) 🔹 API must receive the correct page number to return limited results 🔹 keepPreviousData helps avoid UI jumps and blank screens 🔹 Good CSS structure matters — it prevents overlapping and maintains layout 🎯 Outcome A smooth, modern, user-friendly pagination UI where: ✨ No flickering ✨ No layout shifting ✨ Old data stays visible while new data loads ✨ Perfect experience for users 🛠️ 𝑻𝒆𝒄𝒉 𝑺𝒕𝒂𝒄𝒌 : React.js, React Query, Axios, JSONPlaceholder API, Custom CSS I’m really enjoying diving deeper into React Query — the amount of control it gives over data fetching is incredible! Excited to keep building and learning more every day! #react #reactjs #reactquery #webdevelopment #frontenddeveloper #learningjourney #javascript

🧠 Deep Dive: Why useSyncExternalStore matters (even if you never use it directly) When React 18 introduced concurrent rendering, one subtle problem appeared: How can React safely read from an external store (like Redux, Zustand, or a custom event emitter) without tearing — where your UI shows inconsistent data between renders? That’s why React introduced useSyncExternalStore. It ensures React always reads a consistent snapshot of external state — even during concurrent updates. Here’s a minimal example 👇 import { useSyncExternalStore } from 'react'; const store = { value: 0, listeners: new Set(), subscribe: (l) => { store.listeners.add(l); return () => store.listeners.delete(l); }, getSnapshot: () => store.value, setValue: (v) => { store.value = v; store.listeners.forEach(l => l()); } }; function Counter() { const value = useSyncExternalStore(store.subscribe, store.getSnapshot); return <button onClick={() => store.setValue(value + 1)}>{value}</button>; } This tiny hook keeps React and your store in perfect sync — with no tearing, no stale data, and full concurrency safety. It’s also what modern state libraries like Zustand and Redux Toolkit use under the hood. Understanding this helps you design custom stores that play nicely with React’s concurrent architecture — a step closer to truly React-native data flow. #React #JavaScript #Frontend #WebDevelopment #ReactJS #Performance #useSyncExternalStore #ConcurrentRendering #StateManagement #CleanCode #SoftwareEngineering #React18

🚀 Handling Async Data In React Today while building my Customer Segmentation page, I ran into a classic React issue: My child component was getting undefined props… because the data hadn’t loaded yet. Why? React doesn’t wait for data—it renders fast, sometimes too fast for your async calls. The simple fix I used: {Array.isArray(users) && users.map((elem) => (...))} ✅ Render only when data is ready ✅ Prevent runtime errors ✅ Keep your UI stable In larger projects, this problem is usually handled with: -Loading states (spinners, skeletons) ->State management tools like Redux or React Query ->TypeScript to catch undefined/null data ->Error handling for network issues 💡 Takeaway: React renders fast—your data might not. Always handle async safely. Thinking about scalability and stability now makes a huge difference in industrial projects. #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #CleanCode #CustomerSegmentation #LearningInPublic

⚛️ That moment when I finally got my API call to work… and data appeared on the screen! 😍 When I first started learning React, I thought fetching data was simple — just call the API and show the data. But then… the re-renders, async calls, and errors started showing up like plot twists 😅 That’s when I learned the right way 👇 ✅ Using useEffect() for API calls: import React, { useEffect, useState } from "react"; function UserList() { const [users, setUsers] = useState([]); useEffect(() => { fetch("https://lnkd.in/gTcasaiP") .then(res => res.json()) .then(data => setUsers(data)) .catch(err => console.error(err)); }, []); return ( <ul> {users.map(user => <li key={user.id}>{user.name}</li>)} </ul> ); } 💡 Lesson learned: Always use useEffect() for API calls to avoid infinite loops. Handle loading and errors gracefully. Keep your data state clean and predictable. Once I understood this pattern, fetching data in React felt like second nature. ⚡ #ReactJS #WebDevelopment #FrontendDeveloper #MERNStack #JavaScript #API #useEffect #ReactHooks #LearningByDoing #CodingJourney

 Frontend:  - Angular 20 with zoneless change detection (cutting-edge architecture)  - TypeScript (strict mode) + Angular Signals for state management  - Apollo Client + GraphQL for efficient data fetching  - Chart.js & ApexCharts for data visualization  - SCSS + custom design system  - Lottie animations for smooth UX  Features:  - i18n support (English & Georgian)  - Advanced filtering & sorting  - Mobile-first responsive design frontendRepoUrl:https://lnkd.in/dEnMMhTp Backend:  Key Features:  • Advanced transaction management with filtering, sorting & pagination  • Budget tracking with real-time spending analysis  • Savings goals (pots) with progress tracking  • Multi-currency support (USD, EUR, GEO, RUB) with live exchange rates  • Comprehensive financial analytics & insights  Tech Stack:  • NestJS + TypeScript for type-safe backend  • GraphQL with Apollo Server for flexible API  • PostgreSQL + TypeORM for robust data management  • JWT authentication with Passport.js  • Kursi.ge API integration for real-time currency conversion backendRepoUrl: https://lnkd.in/d9wwJyiY #NestJS #Angular #TypeScript #GraphQL #PostgreSQL #TypeORM #Apollo #ApolloClient #FrontendDevelopment #ResponsiveDesign #SCSS #DesignSystem #LottieAnimations

⚛️ When I finally stopped my React component from doing unnecessary math 😅 I was building a dashboard where a small counter update caused my entire expensive calculation to re-run — every. single. time. 🤯 Even though the input didn’t change, React was recalculating it again and again. My poor CPU was screaming! 💻🔥 That’s when I discovered useMemo() — the performance lifesaver I didn’t know I needed. Here’s what I learned 👇 ❌ Before: function Dashboard({ data }) { const total = heavyCalculation(data); return <h1>Total: {total}</h1>; } ✅ After using useMemo(): function Dashboard({ data }) { const total = useMemo(() => heavyCalculation(data), [data]); return <h1>Total: {total}</h1>; } 💡 What useMemo() does: It remembers the result of your calculation until its dependencies change. If nothing changes, it just returns the cached value — no more re-running heavy logic! 🚀 ✨ Lesson learned: Use useMemo() when your function is expensive and your inputs don’t change often. React will thank you with smoother performance! 🙌 #ReactJS #useMemo #ReactHooks #FrontendDeveloper #MERNStack #PerformanceOptimization #WebDevelopment #JavaScript #LearningByDoing #CodingJourney

𝗪𝗮𝗻𝘁 𝘁𝗼 𝗳𝗲𝘁𝗰𝗵 𝗱𝗮𝘁𝗮 𝘄𝗶𝘁𝗵𝗼𝘂𝘁 𝗯𝗹𝗼𝗰𝗸𝗶𝗻𝗴 𝘆𝗼𝘂𝗿 𝗨𝗜? 𝗧𝗿𝘆 𝗥𝗲𝗮𝗰𝘁 𝗦𝘂𝘀𝗽𝗲𝗻𝘀𝗲! Suspense lets you "wait" for async operations (like data fetching) without blocking the entire UI. No more loading spinners that freeze your app! How it works: → Wrap your async component with 𝗥𝗲𝗮𝗰𝘁.𝗦𝘂𝘀𝗽𝗲𝗻𝘀𝗲 → Use a "fallback" component (e.g., a spinner or skeleton screen) while data is loading → Once data is ready, React automatically swaps in the fully loaded component Benefits: • Improved user experience—only the relevant part of the UI waits for data • Cleaner code—no more manual loading states or conditional rendering • Seamless integration with React Query, SWR, or other data-fetching libraries Example: ``` <Suspense fallback={<Spinner />}> <AsyncComponent /> </Suspense> ``` Tip: Combine Suspense with 𝗥𝗲𝗮𝗰𝘁.𝗹𝗮𝘇𝘆 for even better performance. Load components only when they’re needed! 𝗥𝗲𝘀𝗼𝘂𝗿𝗰𝗲𝘀: • 𝗥𝗲𝗮𝗰𝘁 𝗱𝗼𝗰𝘀: https://lnkd.in/dUpifpQG • 𝗣𝗿𝗮𝗰𝘁𝗶𝗰𝗮𝗹 𝘁𝘂𝘁𝗼𝗿𝗶𝗮𝗹𝘀 𝗼𝗻 𝗦𝘂𝘀𝗽𝗲𝗻𝘀𝗲 + 𝗱𝗮𝘁𝗮 𝗳𝗲𝘁𝗰𝗵𝗶𝗻𝗴 #ReactJS #Suspense #DataFetching #WebDevelopment #JavaScript #Frontend #ReactDev

𝐒𝐭𝐢𝐥𝐥 𝐮𝐬𝐢𝐧𝐠 𝐮𝐬𝐞𝐒𝐭𝐚𝐭𝐞 𝐚𝐧𝐝 𝐮𝐬𝐞𝐄𝐟𝐟𝐞𝐜𝐭 𝐭𝐨 𝐟𝐞𝐭𝐜𝐡 𝐝𝐚𝐭𝐚? 𝐘𝐨𝐮'𝐫𝐞 𝐝𝐨𝐢𝐧𝐠 𝐢𝐭 𝐭𝐡𝐞 𝐡𝐚𝐫𝐝 𝐰𝐚𝐲. Every React developer has written this code a hundred times: create loading state, create error state, create data state, useEffect with fetch, handle errors, add loading spinners, somehow manage cache, deal with race conditions... Fifty lines of boilerplate just to fetch a user profile. Then you need to refetch when the data changes. Or handle pagination. Or invalidate cache. Or retry failed requests. Or show stale data while refetching. Each feature adds more complexity until your component is 80% state management and 20% actual UI. 𝐓𝐚𝐧𝐒𝐭𝐚𝐜𝐤 𝐐𝐮𝐞𝐫𝐲 𝐞𝐥𝐢𝐦𝐢𝐧𝐚𝐭𝐞𝐬 𝐚𝐥𝐥 𝐨𝐟 𝐭𝐡𝐢𝐬. Instead of managing loading, error, and data states manually, you get: → Automatic caching and background refetching → Loading and error states built-in → Stale data strategies handled for you → Automatic retries on failed requests → Request deduplication out of the box → Optimistic updates made simple One hook replaces 50+ lines of boilerplate. Your components become readable again. Data fetching actually works the way users expect—fast, reliable, and smart. No more useState soup. No more useEffect dependency arrays breaking everything. No more manually tracking loading states across your app. Building React apps that fetch data? TanStack Query turns complex data fetching into one simple hook. 💬 𝐇𝐨𝐰 𝐝𝐨 𝐲𝐨𝐮 𝐡𝐚𝐧𝐝𝐥𝐞 𝐀𝐏𝐈 𝐜𝐚𝐥𝐥𝐬 𝐢𝐧 𝐑𝐞𝐚𝐜𝐭? 𝐒𝐭𝐢𝐥𝐥 𝐮𝐬𝐢𝐧𝐠 𝐮𝐬𝐞𝐄𝐟𝐟𝐞𝐜𝐭 𝐨𝐫 𝐬𝐰𝐢𝐭𝐜𝐡𝐞𝐝 𝐭𝐨 𝐚 𝐥𝐢𝐛𝐫𝐚𝐫𝐲? #ReactJS #TanStackQuery #ReactQuery #Frontend #JavaScript #TypeScript #WebDevelopment #StateManagement #Programming #DeveloperTools #NexaLabsagency

React architecture changed more in 18 months than in the previous 8 years. Here’s what actually works at scale in 2025 (learned the hard way): Adopt (server-first by default) • Server Components for data + heavy libs; push ‘use client’ to the leaves • TanStack Query for server state; Zustand or RTK for client/UI state • Three layers: Presentation (pure UI) → Application (hooks + pure funcs) → Services (IO) • Next.js 15 patterns: nested layouts, Suspense streaming, Server Actions • TypeScript everywhere, Tailwind (optionally shadcn/ui) for sane velocity Avoid (these collapse under growth) • Business logic inside components/hooks (test-hostile, not reusable) • God Context that re-renders the world on every change • Overusing effects for data fetching/mutations that belong on the server • Premature folder complexity before you hit real pain Principles that keep teams fast • If it doesn’t need state/effects/DOM, make it a pure function (DI for testability) • Feature-based folders past ~50 components; clear ownership boundaries • Caching is explicit; measure bundle size + CWV, not vibes Testing that actually pays off • 60–70% unit tests (pure funcs) • 20–30% integration (RTL) • 5–10% E2E (Playwright) on revenue-critical flows Result: smaller bundles, faster first paint via streaming, simpler tests, and code you can move between web and mobile without rewrites. #ReactJS #Nextjs #ServerComponents #TypeScript #WebDevelopment

Learning from my Current Job as a Developer — Part 2 React Query vs Redux Toolkit - My Real-World Takeaway When I started my current project, I used Redux Toolkit for everything fetching APIs, managing loaders, and storing responses. It worked… but came with tons of boilerplate. Then I switched to React Query, and it felt like breathing fresh air 💨 Here’s what I learned 👇 ⚙️ Redux Toolkit ✅ Great for client-side state (UI filters, theme, modals) ✅ But not ideal for server-side data (API responses, caching) ⚡ React Query Advantages ✅ Minimal code - just one hook ✅ Built-in caching and background refetch ✅ Auto retries, error + loading handling ✅ Mutations that keep your data always fresh ✅ No need to manually dispatch actions again 💬 My Takeaway Use React Query for API/server data. Use Redux Toolkit or Context for UI/local state. #ReactQuery #ReduxToolkit #ReactJS #WebDevelopment #Frontend #LearningFromWork #StateManagement #DeveloperJourney