React Fundamentals: Virtual DOM & Diff Algorithm

Built multiple projects with React, and one thing I’ve realized is performance isn’t just about code — it’s about the right tools. React gives flexibility with components, hooks, and rendering control. But when it comes to production-level optimization, Next.js adds that extra edge with SSR, SSG, routing, and built-in optimizations. Understanding where to use what makes the real difference 🚀 #React #NextJS #WebDevelopment #Frontend #Performance #JavaScript

🚀 Day 9 of Building React Projects Today I built a Login & Registration System using React.js. This project focuses on user authentication flow where users can register, log in, and manage their access with a simple and responsive UI. ✨ Features: • User Registration • User Login Authentication • Form validation • Error handling for invalid inputs • Responsive UI 🛠 Concepts Used: • React Hooks (useState) • Form Handling • Conditional Rendering • Basic Authentication Logic 💻 Tech Stack: React.js JavaScript HTML CSS 🔗 GitHub Repository: https://lnkd.in/dDTrzHXW #React #JavaScript #WebDevelopment #FrontendDevelopment #LearningInPublic #ReactProjects

Are you mutating state directly in React? 🛑 If you are using methods like ".push()" on your state arrays, you might be causing hidden UI bugs and skipped re-renders. React relies on immutability to track changes and keep your app running smoothly. Swipe through to see the wrong way, the right way, and exactly why immutability matters in React! 👇 What is your preferred way to handle complex state objects? Let me know in the comments! #ReactJS #WebDevelopment #Frontend #CodingTips #webDev #javascript #frontendInterview

Still downloading icons as images and then using them in your projects? That usually means you're missing out on modern frontend development practices. In today’s React / Next.js ecosystem, we don’t rely on image-based icons anymore. Instead, we use modern icon libraries like lucide-react, where icons are directly imported as components: import { Mail, Lock, User } from "lucide-react"; This approach makes your code: ✔ cleaner ✔ faster ✔ easier to maintain ✔ optimized through tree-shaking Small modern practices like this separate a beginner setup from a production-level frontend workflow. #ReactJS #NextJS #FrontendDevelopment #LucideReact #WebDevelopment

Lately, I’ve been focusing a lot on one thing: reusability. Building shared components and using them across different panels and applications has completely changed how I work. Everything feels faster, cleaner, and far more consistent. Instead of rebuilding the same UI again and again, I now rely on a single reusable component system that I can plug in wherever it’s needed. Here’s what improved as a result: • Better code reusability • More consistent UI across apps • Easier maintenance • Faster development cycles • Cleaner structure across multiple frontend projects Project stack: Vue 3, TypeScript, JavaScript, Vite, Vue Router, Pinia, PrimeVue, Tailwind CSS, Yarn Workspaces This setup is helping me get real-world experience in building scalable, well-structured frontend systems. #FrontendDeveloper #VueJS #JavaScript #TypeScript #Monorepo #YarnWorkspaces #ReusableComponents #WebDevelopment #FrontendArchitecture #PrimeVue #TailwindCSS

Ever wondered how things actually work behind the scenes in JavaScript? 🤔 This simple concept changed how I think about building apps 👇 👉 A listener is just code that waits… and runs only when something happens. No constant execution. No unnecessary work. Just event → action ⚡ This is not just basic JS — 👉 this is exactly how Chrome works internally 👉 how Browser extensions communicate 👉 how modern apps stay fast and responsive Once you understand listeners, you start thinking in event-driven systems, not just functions. And that’s where real engineering begins 🚀 #javascript #webdevelopment #frontend #softwareengineering #reactjs #chromeextension

✨ 𝗗𝗮𝘆 𝟰 𝗼𝗳 𝗠𝘆 𝗥𝗲𝗮𝗰𝘁 𝗝𝗼𝘂𝗿𝗻𝗲𝘆 ⚛️🚀 Today I learned about the `𝘂𝘀𝗲𝗘𝗳𝗳𝗲𝗰𝘁` 𝗵𝗼𝗼𝗸, and more importantly, 𝘄𝗵𝘆 𝘄𝗲 𝗮𝗰𝘁𝘂𝗮𝗹𝗹𝘆 𝗻𝗲𝗲𝗱 𝗶𝘁. While working with React, I noticed that components are mainly for rendering UI. But sometimes we need to do things outside rendering — like fetching data, setting up timers, or updating something after the UI changes. That’s where `𝘂𝘀𝗲𝗘𝗳𝗳𝗲𝗰𝘁` comes in. It lets us handle these 𝘀𝗶𝗱𝗲 𝗲𝗳𝗳𝗲𝗰𝘁𝘀 in a clean and controlled way. What I found interesting is how it runs after render and can depend on specific values. Instead of mixing everything together, React separates 𝗨𝗜 𝗹𝗼𝗴𝗶𝗰 from 𝘀𝗶𝗱𝗲 𝗲𝗳𝗳𝗲𝗰𝘁𝘀, which makes the code easier to understand and manage. Starting to see how React keeps things structured as apps grow 💻⚡ #ReactJS #JavaScript #WebDevelopment #LearningJourney #FrontendDevelopment

One small mistake I used to make in React.js 👇 I was re-rendering components unnecessarily, which was affecting performance. What helped me fix it: • Using React.memo for pure components • useCallback to prevent function re-creation • useMemo for expensive calculations 📊 Result: Better performance and smoother UI experience Sometimes small optimizations make a big difference ⚡ #ReactJS #FrontendDeveloper #WebPerformance #JavaScript

🚀 React Series – Day 17 React Router – Navigating Without Reloading the Page Modern web applications don’t reload the page every time you navigate; they feel fast and seamless. This is possible because of client-side routing, and in React, it’s handled using React Router. Instead of requesting a new page from the server, React updates the UI based on the URL. Key ideas: • Different URLs map to different components • Navigation happens instantly without a full page reload • Improves user experience significantly 👉 This is what makes React apps behave like real applications instead of traditional websites. #reactjs #javascript #frontenddeveloper #webdevelopment #codinginterview #learnreact #30daysofcode #programming #reactinterview #react #coding