Frontend Concepts Checklist: 25 Essential Topics

Important Frontend Concepts Checklist- 1. Pagination 2. Infinite Scrollbar 3. Debouncing 4. Websocket 5. REST vs GraphQI APIs 6. Local Storage vs Cookies 7. Authentication vs Authorization 8. Redux ( Or any other state management library) 9. Lazy Loading 10. Code Splitting 11. Bundle Size Optimization 12. Tree Shaking 13. Memoization (useMemo, useCallback) 14. Caching (Client + Server) 15. CSR vs SSR vs SSG vs ISR 16. Core Web Vitals (LCP, INP, CLS) 17. Cross Browser Compatibility 18. Optimistic UI Updates 19. Suspense (React) 20. Image Optimization (WebP, AVIF) 21. Accessibility (a11y) 22. Webpack 23. Micro-Frontend Architecture 24. Unit Testing 25. Polyfills, Babel #ReactDeveloper #FrontEnd #FrontEndDeveloper #Javascript #Angular #AngularDeveloper #react #Typescript

Important Frontend Concepts Checklist- 1. Pagination 2. Infinite Scrollbar 3. Debouncing 4. Websocket 5. REST vs GraphQl APIs 6. Local Storage vs Cookies 7. Authentication vs Authorization 8. Redux 9. Lazy Loading 10. Code Splitting 11. Bundle Size Optimization 12. Tree Shaking 13. Memoization (useMemo, useCallback) 14. Caching (Client + Server) 15. CSR vs SSR vs SSG vs ISR 16. Core Web Vitals (LCP, INP, CLS) 17. Cross Browser Compatibility 18. Optimistic UI Updates 19. Suspense (React) 20. Image Optimization (WebP, AVIF) 21. Accessibility (a11y) 22. Webpack 23. Micro-frontend Architecture 24. Testing- RTL, Jest, Playwright 25. Polyfills, Babel Get ebook with (detailed 232 ques = 50+ Reactjs Frequent Ques & Answers, 45+ Reactjs scenario based questions, 90+ frequently asked interview questions and answers, 50+ Output based ques & ans, 25+ Coding Questions & ans) 𝐄𝐛𝐨𝐨𝐤 𝐋𝐢𝐧𝐤: https://lnkd.in/gJMmH-PF Interview Guidance: https://lnkd.in/gr9PCuxd Follow on Instagram : https://lnkd.in/g-iSTsRd #javascript #javascriptdeveloper #reactjs #reactnative #vuejsdeveloper #angular #angulardeveloper

Important Frontend Concepts Checklist- 1. Pagination 2. Infinite Scrollbar 3. Debouncing 4. Websocket 5. REST vs GraphQl APIs 6. Local Storage vs Cookies 7. Authentication vs Authorization 8. Redux 9. Lazy Loading 10. Code Splitting 11. Bundle Size Optimization 12. Tree Shaking 13. Memoization (useMemo, useCallback) 14. Caching (Client + Server) 15. CSR vs SSR vs SSG vs ISR 16. Core Web Vitals (LCP, INP, CLS) 17. Cross Browser Compatibility 18. Optimistic UI Updates 19. Suspense (React) 20. Image Optimization (WebP, AVIF) 21. Accessibility (a11y) 22. Webpack 23. Micro-frontend Architecture 24. Testing- RTL, Jest, Playwright 25. Polyfills, Babel Get ebook with (detailed 232 ques = 50+ Reactjs Frequent Ques & Answers, 45+ Reactjs scenario based questions, 90+ frequently asked interview questions and answers, 50+ Output based ques & ans, 25+ Coding Questions & ans) 𝐄𝐛𝐨𝐨𝐤 𝐋𝐢𝐧𝐤: https://lnkd.in/gJMmH-PF Interview Guidance: https://lnkd.in/gr9PCuxd Follow on Instagram : https://lnkd.in/g-iSTsRd #javascript #javascriptdeveloper #reactjs #reactnative #vuejsdeveloper #angular #angulardeveloper

Important Frontend Concepts Checklist- 1. Pagination 2. Infinite Scrollbar 3. Debouncing 4. Websocket 5. REST vs GraphQl APIs 6. Local Storage vs Cookies 7. Authentication vs Authorization 8. Redux 9. Lazy Loading 10. Code Splitting 11. Bundle Size Optimization 12. Tree Shaking 13. Memoization (useMemo, useCallback) 14. Caching (Client + Server) 15. CSR vs SSR vs SSG vs ISR 16. Core Web Vitals (LCP, INP, CLS) 17. Cross Browser Compatibility 18. Optimistic UI Updates 19. Suspense (React) 20. Image Optimization (WebP, AVIF) 21. Accessibility (a11y) 22. Webpack 23. Micro-frontend Architecture 24. Testing- RTL, Jest, Playwright 25. Polyfills, Babel Get ebook with (detailed 232 ques = 50+ Reactjs Frequent Ques & Answers, 45+ Reactjs scenario based questions, 90+ frequently asked interview questions and answers, 50+ Output based ques & ans, 25+ Coding Questions & ans) 𝐄𝐛𝐨𝐨𝐤 𝐋𝐢𝐧𝐤: https://lnkd.in/gJMmH-PF Interview Guidance: https://lnkd.in/gr9PCuxd Follow on Instagram : https://lnkd.in/g-iSTsRd hashtag #javascript #javascriptdeveloper #reactjs #reactnative #vuejsdeveloper #angular #angulardeveloper

SSR vs RSC Think of online shopping: **SSR 🛒** You open a product page and get the fully prepared page from the server—but your browser still loads a lot of JavaScript to make it interactive. **RSC 📦** Only the necessary parts are sent to your browser, while heavy work stays on the server—making everything faster and lighter. 👉 SSR = full page, more JS 👉 RSC = less JS, smarter delivery #React #WebDevelopment #Frontend #JavaScript #NextJS #SoftwareEngineering #Programming #WebPerformance #TechExplained

Built a Snake Game using Vanilla JavaScript 🐍 Focused not just on functionality, but on writing clean and structured code: • Modular architecture (separation of concerns) • Game state management & smooth loop • High score persistence using localStorage • Start / Restart game flow This project helped me understand how even simple apps can be designed with scalability in mind. Would love feedback and suggestions 🙌 #javascript #webdevelopment #frontend #buildinpublic https://lnkd.in/gYhiMs6d

Your Next.js Module Federation setup builds without errors. Remotes appear to load. But components render blank. No errors in console. No stack traces. Nothing. The culprit? One missing environment variable: NEXT_PRIVATE_LOCAL_WEBPACK=true Here's what every Next.js MFE host needs: 1. NEXT_PRIVATE_LOCAL_WEBPACK=true — forces local webpack 5 instead of Next.js's bundled copy (no flag = silent Module Federation failure) 2. eager: false for ALL shared deps — eager: true causes SSR hydration mismatch errors 3. isServer ternary for Next.js remotes — picks /ssr/remoteEntry.js on server, /chunks/remoteEntry.js on client 4. output: 'standalone' — ~150MB Docker images instead of 500MB+ 5. ssr: false in next/dynamic — mandatory because remotes attach to window 6. enableImageLoaderFix: true — fixes next/image URLs from remote components 7. Node.js fallbacks (fs: false, stream: false, zlib: false) — browser build crashes without them The full guide walks through a complete production next.config.js with 18 code examples, covers React + Next.js mixed remotes, shared Redux singleton setup, PWA wrapper, and common mistakes. Read the full guide: https://lnkd.in/g6-EjNfE #MicroFrontend #NextJS #ReactJS #ModuleFederation #Webpack5 #WebDev #Frontend #JavaScript #TypeScript #Architecture #DesettiSrinu

🚀 𝗕𝘂𝗶𝗹𝘁 & 𝗣𝘂𝗯𝗹𝗶𝘀𝗵𝗲𝗱: 𝘂𝘀𝗲-𝘁𝗵𝗲𝗺𝗲-𝗺𝗼𝗱𝗲 🌗 𝘈 𝘭𝘪𝘨𝘩𝘵𝘸𝘦𝘪𝘨𝘩𝘵 𝘙𝘦𝘢𝘤𝘵 𝘩𝘰𝘰𝘬 𝘧𝘰𝘳 𝘥𝘢𝘳𝘬/𝘭𝘪𝘨𝘩𝘵 𝘮𝘰𝘥𝘦 Dark mode shouldn’t be complicated or overly opinionated. That’s why I built 𝘂𝘀𝗲-𝘁𝗵𝗲𝗺𝗲-𝗺𝗼𝗱𝗲, an open‑source React hook that focuses purely on 𝘁𝗵𝗲𝗺𝗲 𝘀𝘁𝗮𝘁𝗲 𝗺𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁, while giving developers full control over styling. ✅ 𝗪𝗵𝗮𝘁 𝗶𝘁 𝗵𝗮𝗻𝗱𝗹𝗲𝘀 𝗼𝘂𝘁 𝗼𝗳 𝘁𝗵𝗲 𝗯𝗼𝘅: • Light and dark theme switching • System preference detection (prefers-color-scheme) • Persistent theme using localStorage • Cross‑tab theme synchronization • SSR‑safe (works with Next.js) • Zero runtime dependencies You control the UI. The hook handles the logic. 🔗 𝗟𝗶𝘃𝗲 𝗗𝗲𝗺𝗼: https://lnkd.in/d2AprnYd 📝 𝗙𝘂𝗹𝗹 𝘁𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗯𝗹𝗼𝗴 𝗼𝗻 𝗗𝗘𝗩.𝘁𝗼: https://lnkd.in/d78gT_zB 📦 𝗻𝗽𝗺 𝗽𝗮𝗰𝗸𝗮𝗴𝗲: https://lnkd.in/dHF6iM7T This project was a great learning experience around: • npm publishing & versioning • token‑based npm security • documentation & demos • shipping production‑ready open source Feedback, suggestions, and contributions are always welcome 🚀 #React #JavaScript #Frontend #OpenSource #WebDevelopment #NPM #DarkMode #OSS

React keeps two copies of your UI in memory and swaps them after every commit. That's double buffering. Part 2 goes deeper: priority lanes, where hooks actually live, the three sub-phases of the commit, and why React can pause rendering mid-tree. Read more: https://lnkd.in/ddqhgxHZ #React #Fiber #rendering #reconciliation #JavaScript #WebDev #SoftwareEngineering #BuildInPublic

Stop overcomplicating Micro-frontends architecture — when and how to split your frontend. I've reviewed hundreds of implementations. The best ones? Dead simple. The pattern: - Start with the boring solution - Measure actual bottlenecks - Only then add complexity Premature optimization is real, and it kills projects. What's the simplest solution you've shipped that just worked? #WebDevelopment #TypeScript #Frontend #JavaScript