Shubham Hirap’s Post

My client's app was bleeding users. 6.2-second load time. Brutal. The problem wasn't the design or the copy — it was a React SPA shipping a 2.4MB JavaScript bundle to every visitor before showing a single pixel. Here's what I did to fix it: → Migrated the 3 highest-traffic pages to Next.js with Server-Side Rendering (SSR) → Split the bundle using dynamic imports — lazy-loaded everything below the fold → Moved static content to Static Site Generation (SSG) with ISR for cache efficiency → Replaced heavy client-side data fetching with getServerSideProps Result after 2 weeks: — Load time: 6.2s → 2.4s (61% faster) — Largest Contentful Paint: 4.8s → 1.6s — Bounce rate dropped by 34% The client hadn't changed a single word of content. Just cleaner architecture. This is why I now audit the rendering strategy before touching the UI on every new project. What's the worst load time you've inherited on a project? Drop it below — curious how bad it gets out there. #nextjs #reactjs #webperformance #fullstackdeveloper #buildinpublic #llm #vibecoding #anthropic

Today I explored React Router and key concepts behind Single Page Applications (SPA). 🔹 SPA – Loads a single HTML page and dynamically updates content without full page reloads. Example: Facebook, Gmail. 🔹 React SPA – Component-based SPA built with React. Each UI part is a reusable component. 🔹 Routing – Controls which component shows based on the URL, keeping navigation fast. 🔹 Nested Routing & Outlet – Parent routes can have child routes, and Outlet decides where the child renders. Example: Dashboard → Profile / Settings. 🔹 Link & NavLink – Link navigates without reload; NavLink highlights active routes. 🔹 Loader & useLoaderData – Fetch data before route renders and access it in the component easily. 🔹 Params & Dynamic Routes – Capture dynamic URL values with: id and useParams(). Example: /user/5 → id = 5. 🔹 useNavigate – Programmatically navigate between routes. Example: Redirect after form submission. Understanding these makes building scalable and smooth React apps much easier! #React #SPA #Frontend #WebDevelopment #JavaScript

🔍 Pokédex Web App – Built with React & PokéAPI Excited to share my latest project – an interactive Pokémon Explorer that allows users to search and view detailed Pokémon data in a clean and responsive UI. 💡 Key Features: • Fetches real-time Pokémon data from a public API • Dynamic search functionality for quick filtering • Detailed Pokémon cards with stats like height, weight, abilities, and experience • Smooth and responsive user interface 🛠️ Technologies Used: • React.js – Component-based UI development • JavaScript (ES6+) – Async/await, array methods, and modern syntax • React Hooks – useState, useEffect for state and lifecycle management • REST API Integration – Data fetched from PokéAPI • HTML5 & CSS3 – Structure and styling • Fetch API – Handling API requests • Vite – Fast development build tool 📚 What I Learned: • Handling asynchronous data fetching and multiple API calls • Managing application state efficiently in React • Building reusable components • Implementing real-time search/filter functionality 💻 This project helped me strengthen my frontend development skills and deepen my understanding of working with APIs. 🔗 GitHub Repo: https://lnkd.in/gHvaEhn4 I would love to hear your feedback! 😊 #ReactJS #JavaScript #WebDevelopment #FrontendDevelopment #API #Projects #LearningByDoing

✅ Module 40 done. Next.js fully unlocked. 🚀 All 10 lessons. ~132 minutes. Here's everything I learned: ✔️ What is Next.js & why it beats plain React for production ✔️ Project structure — app/, layout.js, page.js ✔️ File-based routing — no React Router, ever again ✔️ DaisyUI setup in Next.js ✔️ Dynamic routing with [id] segments ✔️ Multiple nested layouts — no full page re-renders ✔️ Dynamic routing + data loading recap ✔️ Image optimization with <Image /> component ✔️ SEO Metadata API + custom Not Found page + Active Links ✔️ Google Fonts via next/font — zero external CSS Biggest mindset shift: Your folder structure IS your routing. That one idea changes everything. 🤯 Next step: build a real Next.js project. 💪 — #NextJS #ReactJS #WebDev #LearningInPublic #FrontendDev #JavaScript #100DaysOfCode #BuildInPublic #AppRouter #CodeNewbie #DevLife #CodingJourney #ModuleComplete

Your Next.js app throws a "Hydration failed" warning ⚠️. You ignore it because the UI eventually loads fine. This is a massive architectural mistake. It is silently destroying your page speed. 👇 The Trap: The React Panic 💥 Server-Side Rendering (SSR) is supposed to be fast. The server sends pre-built HTML, and React "hydrates" it by attaching event listeners. But React expects the Server HTML and the initial Client HTML to be 100% identical. What happens if you use window.innerWidth or new Date()? The server generates one value. The browser generates another. React sees the mismatch and panics. It throws away the perfectly good Server HTML. It completely rebuilds the entire DOM from scratch on the client. You just forced the browser to do twice the work. Your SSR was completely wasted. The Fix: Two-Pass Rendering 🧊 If a component relies on browser-only data, delay that specific render until after hydration. 1️⃣ State: const [isMounted, setIsMounted] = useState(false); 2️⃣ Hydrate: useEffect(() => setIsMounted(true), []); 3️⃣ Render: Only show the browser-specific UI if isMounted is true. Otherwise, render a skeleton. The Takeaway: Next.js gives you a massive performance head start. Don't ruin it by forcing React to throw away the server's hard work. Are you ignoring hydration warnings, or actively fixing your component boundaries? 👇 #NextJS #ReactJS #FrontendEngineering #WebDevelopment #SoftwareArchitecture #SystemDesign #PerformanceOptimization

𝗖𝗟𝗦 and 𝗟𝗖𝗣 are silently killing your React app’s performance—even if your Lighthouse score looks decent. Here’s how to fix them in heavy applications: → 𝗖𝗹𝗶𝗰𝗸 𝗧𝗼 𝗖𝗼𝗻𝗻𝗲𝗰𝘁: 𝗧𝗵𝗲 𝗖𝗟𝗦 𝗖𝘂𝗹𝗽𝗿𝗶𝘁 • Unstable layouts often come from async-loaded content (images, fonts, ads). • 𝗥𝗲𝘀𝗲𝗿𝘃𝗲 space with `aspect-ratio` or fixed-height containers. • Use `loading="lazy"` + `width`/`height` attributes on images. • Preload critical fonts with `<link rel="preload">`. → 𝗟𝗖𝗣: 𝗧𝗵𝗲 𝗛𝗲𝗮𝘃𝘆 𝗟𝗶𝗳𝘁 • 𝗗𝗼𝗻’𝘁 wait for React hydration—stream critical content server-side (SSR/Next.js). • Code-split with `React.lazy()` + `Suspense`, but 𝗽𝗿𝗶𝗼𝗿𝗶𝘁𝗶𝘇𝗲 visible content. • Optimize third-party scripts: defer non-critical, use `rel="preconnect"` for APIs. → 𝗧𝗼𝗼𝗹𝘀 𝗧𝗼 𝗗𝗲𝗯𝘂𝗴 • Chrome DevTools → 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝘁𝗮𝗯 (record + analyze layout shifts). • Web Vitals Extension (real-time CLS/LCP tracking). • `next/dynamic` for heavy components (Next.js). 𝗣𝗿𝗼 𝘁𝗶𝗽: If CLS persists, check for FOUC (Flash of Unstyled Content). Inline critical CSS. #WebPerformance #ReactJS #FrontEnd #CoreWebVitals #LCP #CLS #NextJS #Optimization

✨ 𝗗𝗮𝘆 𝟭𝟭 𝗼𝗳 𝗠𝘆 𝗥𝗲𝗮𝗰𝘁 𝗝𝗼𝘂𝗿𝗻𝗲𝘆 ⚛️🚀 Today I learned 𝗥𝗲𝗮𝗰𝘁 𝗥𝗼𝘂𝘁𝗲𝗿, and it finally made sense how single-page applications handle navigation. In normal websites, moving to another page means a full reload. But in React, React Router allows navigation between different views 𝘄𝗶𝘁𝗵𝗼𝘂𝘁 𝗿𝗲𝗳𝗿𝗲𝘀𝗵𝗶𝗻𝗴 𝘁𝗵𝗲 𝗯𝗿𝗼𝘄𝘀𝗲𝗿, which makes the app feel much smoother and faster. I learned how routes connect components to URLs, and how layouts can stay persistent while only specific parts of the UI change. What I found interesting is that navigation in React is not really “loading pages” — it’s just swapping components intelligently. Starting to feel how modern frontend apps are structured 💻⚡ #ReactJS #JavaScript #WebDevelopment #LearningJourney #FrontendDevelopment

If your React app “randomly” re-renders, it’s not random — it’s reconciliation at work. ⚛️🔍 React’s job is to keep the UI in sync with state. The key steps: 1) Render phase: React builds a new virtual tree from your components (pure calculation, no DOM). 2) Reconciliation: it diffs the new tree vs the previous one to decide what changed. 3) Commit phase: it applies changes to the DOM and runs layout effects. Practical implications I see in real products (Next.js dashboards, enterprise workflows, AI-assisted UIs): • A parent state update re-renders all children by default. It’s usually fine… until it isn’t. 🧠 • Memoization (React.memo/useMemo/useCallback) helps only when props are stable and computations are expensive. Overuse adds complexity. • Keys aren’t cosmetic. Bad keys = wrong preservation of state + extra work. 🔑 • Effects don’t run “after render” in general — useEffect runs after paint; useLayoutEffect runs before paint and can block it. 🎯 • In Concurrent React, renders can be interrupted/restarted. Don’t rely on render-time side effects. Takeaway: optimize by measuring, then stabilize props, fix keys, and move heavy work off the critical render path. 📈🚀 #react #javascript #nextjs #frontend #performance

🚀 Next.js Pages & Layouts Understanding routing and layout in Next.js can feel tricky at first… Here’s a quick breakdown 👇 🧩 Pages (Routing Made Easy) → Every file becomes a route automatically → `/app/home/page.js` → `/home` → No need for React Route 🧱 Layouts (Reusable UI) → Define common UI like Navbar & Footer → Wraps all pages automatically → Keeps UI consistent across app 🔁 Nested Layouts (Scalable Apps) → Create layouts for specific sections → Example: `/dashboard/layout.js` → Perfect for admin panels & dashboards ⚡ Why it matters? ✔ No manual routing ✔ Clean project structure ✔ Reusable components ✔ Better scalability 💡 Build once, reuse everywhere — that’s the power of Next.js layouts! 💬 Are you using App Router or still on Pages Router? #NextJS #React #Frontend #WebDevelopment #JavaScript #SoftwareEngineering #Coding