Dhivya P’s Post

Your app might be slow because you are making the browser do too much work at once. Three performance concepts that changed how I think about frontend: 1. Code Splitting Instead of shipping the entire app JavaScript on the first load, split the bundle into smaller chunks. Example: The user opening the dashboard doesn’t need admin/settings/reporting code immediately. Load what is needed first. Load the rest later. 2. Lazy Loading Heavy components like charts, modals, editors, maps, or analytics screens don’t always need to load upfront. With lazy loading, they are loaded only when needed. This improves initial load time and makes the app feel faster. 3.Virtualization Rendering 10,000 rows in the DOM is expensive. Even if your API is fast, the UI can still lag because the browser is rendering too many elements. Virtualization solves this by rendering only the visible items on screen. So instead of rendering 10,000 rows, you render maybe 20–50 visible rows. — The mindset shift: Frontend performance is not only about writing “optimized code”. It is about reducing unnecessary work: • unnecessary JavaScript • unnecessary rendering • unnecessary DOM nodes • unnecessary waiting A fast frontend is not one that does everything quickly. It is one that avoids doing work the user doesn’t need yet. hashtag#reactjs hashtag#frontend hashtag#webperformance hashtag#javascript hashtag#softwareengineering

There's a simple question that most frontend apps never ask: "Does the user on this page actually need this code?" In a typical SPA, the answer for a significant portion of the JavaScript bundle is: no. Code splitting is the practice of shipping only the code each page needs. What modern bundlers give you automatically: → Route-level splitting (each page is its own chunk) → Vendor chunk separation (React, lodash, etc. in a separate long-lived cache) What you still do yourself: Split heavy components that aren't immediately visible: ``` // Before: the chart library ships on every page import { ComplexDataGrid } from 'heavy-data-grid-lib'; // After: loads only when the analytics page renders const ComplexDataGrid = dynamic(() => import('heavy-data-grid-lib')); ``` The mental model: Draw your app's routes. For each route, ask: what does a user on this route actually need? Anything on a different route is a candidate for splitting. The preload trick for predictable journeys: If a user on step 1 almost always goes to step 2, preload step 2's chunk when step 1 mounts: ``` // On step 1 mount, hint the browser to prefetch step 2 useEffect(() => { import('./step-two'); }, []); ``` Step 2 is already cached when the user clicks Next. The result: Users on the marketing homepage never download the dashboard code. Users on the settings page never download the editor. Everyone gets a faster initial load. What's the largest chunk you've split that made a measurable difference?

🚀 Day 26 – Code Splitting (Load Smart, Not Heavy) As your app grows, bundle size becomes a problem: ⚠️ Slow initial load ⚠️ Large JavaScript bundle 📦 ⚠️ Poor performance on slow networks The problem is not React… 👉 It’s loading everything at once 🛒 Simple Analogy Imagine moving into a house 🏠 🔴 Without Code Splitting One truck brings EVERYTHING 😓 👉 Furniture, kitchen, garage… all at once 👉 Slow, overwhelming, inefficient 🟢 With Code Splitting Multiple trucks arrive when needed 🚚 👉 Essentials first 👉 Rest comes later 👉 That’s Code Splitting: Load only what’s needed, when needed 🧠 Why Code Splitting Matters Without it: • Huge initial bundle 😵 • Slower startup • Bad user experience With it: • Smaller initial load ⚡ • Faster performance • Better scalability 💻 1. Without Code Splitting import Dashboard from "./Dashboard"; import Settings from "./Settings"; import Profile from "./Profile"; // All loaded upfront 😓 📦 Bundle: ~500KB 💻 2. With Code Splitting (React.lazy) import { lazy, Suspense } from "react"; const Dashboard = lazy(() => import("./Dashboard")); function App() { return ( <Suspense fallback={<div>Loading...</div>}> <Dashboard /> </Suspense> ); } 🔥 Load only when needed 💻 3. Route-Based Splitting <Route path="/dashboard" element={<Dashboard />} /> 👉 Loads only when user visits route ⚡ Bundle Comparison Without Splitting: 👉 500KB upfront 😓 With Splitting: 👉 50KB initial + chunks on demand ⚡ 📌 Key Strategies ✔ Route-based splitting ✔ Component-based splitting ✔ Vendor splitting 🧠 Benefits ✔ Faster initial load ✔ Smaller bundles ✔ Load on demand ✔ Better performance ⚠️ Important Note 👉 Don’t over-split (too many requests) 👉 Balance performance & UX 💬 Developer Question Where do you use code splitting most? 1️⃣ Routes 2️⃣ Components 3️⃣ Vendor libraries 4️⃣ Everywhere #React #Performance #CodeSplitting #FrontendDevelopment #JavaScript #WebDevelopment #CodingJourney 🚀

🚀 Built a To-Do List Web App using HTML, CSS & JavaScript I recently created a simple task management app to strengthen my frontend skills. ✨ Features: ✔️ Add & delete tasks ✔️ Mark tasks as completed ✔️ Data saved using local storage 🔗 Live Demo: [https://lnkd.in/erim6kMy] 💻 GitHub Repo: [https://lnkd.in/eghkFCdJ] This project helped me understand DOM manipulation and event handling. I’d love your feedback: • What features should I add next? • How can I improve the UI/UX? Your suggestions will really help me improve 🙌 #webdevlopment #javascript #frontend #projects #learning

🚀 Understanding Controlled vs Uncontrolled Components in React — Simplified! Handling forms in React seems simple… until it’s not. Choosing between controlled and uncontrolled components can impact your app’s scalability, validation, and performance. 💡 What are Controlled Components? 👉 Form data is managed by React state const [name, setName] = useState(""); <input value={name} onChange={(e) => setName(e.target.value)} /> ✅ React is the source of truth ✅ Easy validation & control 💡 What are Uncontrolled Components? 👉 Form data is handled by the DOM itself const inputRef = useRef(); <input ref={inputRef} /> 👉 Access value when needed: inputRef.current.value ⚙️ How it works 🔹 Controlled: State-driven Re-renders on every change Full control over input 🔹 Uncontrolled: DOM-driven No re-render on input change Less control 🧠 Real-world use cases ✔ Controlled: Form validation Dynamic UI updates Complex forms ✔ Uncontrolled: Simple forms Performance-sensitive inputs Quick prototyping 🔥 Best Practices (Most developers miss this!) ✅ Prefer controlled components for scalability ✅ Use uncontrolled for simple or performance-heavy cases ✅ Avoid mixing both in the same form ❌ Don’t overuse uncontrolled in complex apps ⚠️ Common Mistake // ❌ Mixing both approaches <input value={name} ref={inputRef} /> 👉 Leads to unpredictable behavior 💬 Pro Insight Controlled = Predictability Uncontrolled = Simplicity 👉 Choose based on complexity vs performance needs 📌 Save this post & follow for more deep frontend insights! 📅 Day 5/100 #ReactJS #FrontendDevelopment #JavaScript #ReactHooks #WebDevelopment #SoftwareEngineering #100DaysOfCode 🚀

🚀 𝗘𝘅𝗰𝗶𝘁𝗲𝗱 𝘁𝗼 𝘀𝗵𝗮𝗿𝗲 𝗺𝘆 𝗹𝗮𝘁𝗲𝘀𝘁 𝗽𝗿𝗼𝗷𝗲𝗰𝘁: 𝗗𝗶𝗴𝗶𝗧𝗼𝗼𝗹𝘀 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺! 🛒💻 I recently built a modern, responsive eCommerce web application designed for exploring and purchasing premium digital tools. This project was an excellent opportunity to deepen my understanding of React state management and dynamic UI rendering! ✨ 𝗞𝗲𝘆 𝗙𝗲𝗮𝘁𝘂𝗿𝗲𝘀 & 𝗪𝗵𝗮𝘁 𝗜 𝗕𝘂𝗶𝗹𝘁: 🔹 𝗜𝗻𝘁𝗲𝗿𝗮𝗰𝘁𝗶𝘃𝗲 𝗖𝗮𝗿𝘁 𝗦𝘆𝘀𝘁𝗲𝗺: Developed a seamless shopping cart where users can add products, remove individual items, automatically calculate totals, and proceed to checkout. 🔹 𝗧𝗮𝗯𝗯𝗲𝗱 𝗕𝗿𝗼𝘄𝘀𝗶𝗻𝗴: Designed an intuitive interface allowing users to toggle smoothly between the main Products gallery and their personal Cart. 🔹 𝗥𝗲𝗮𝗹-𝗧𝗶𝗺𝗲 𝗡𝗼𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀: Integrated React-Toastify to provide users with instant, elegant feedback for actions like adding/removing items or completing a successful checkout. 🔹 𝗗𝘆𝗻𝗮𝗺𝗶𝗰 𝗦𝘁𝗮𝘁𝗲 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁: Managed complex component states to prevent duplicate cart additions and dynamically update UIs (like changing a "Buy Now" button to an inactive "Added to Cart" state). 🛠️ 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸: React.js | Tailwind CSS | Vite | React-Toastify | JavaScript (ES6+) Building this application reinforced my skills in component-driven architecture, conditional rendering, and creating user-centric frontend experiences. 🔗 𝗟𝗶𝘃𝗲 𝗣𝗿𝗲𝘃𝗶𝗲𝘄: https://lnkd.in/eJVHjRew 💻 𝗚𝗶𝘁𝗛𝘂𝗯 𝗥𝗲𝗽𝗼𝘀𝗶𝘁𝗼𝗿𝘆: https://lnkd.in/eCQiGmsr I'd love to hear your thoughts and feedback! Let me know what you think in the comments. 👇 #WebDevelopment #ReactJS #Frontend #TailwindCSS #Vite #JavaScript #CodingJourney #BuildInPublic

Excited to share my latest mini project: A Real-time Weather Forecasting Web App ! 🌦️ I recently developed a dynamic weather dashboard designed to provide users with instantaneous weather updates for any city globally. This project allowed me to dive deep into API integration and asynchronous JavaScript. Key Features: Real-time Data: Fetches live weather metrics including temperature, humidity, and wind speed using the OpenWeatherMap API. Dynamic Search: Seamlessly updates the UI based on user input (as seen in the demo!). Responsive Design: Focused on a clean, intuitive user interface for a smooth user experience. Tech Stack: HTML5, CSS3, JavaScript (ES6+), and REST APIs. I'm constantly looking for ways to improve, so I'd love to hear your feedback in the comments! 🚀 #WebDevelopment #JavaScript #APIs #Frontend #WebDesign #ProjectShowcase

SPA or MPA? Choosing the "Skeleton" of Your App 🦴 The Architecture Tug‑of‑War: Single Page vs. Multi‑Page When designing a frontend system, you have to decide how users move between "pages." Do you want a seamless, app‑like experience, or a robust, document‑like structure? 🔹 SPA (Single Page Application) - Examples: Gmail - Loads once, then JavaScript handles routing. - Feels fast, supports smooth transitions, and keeps state alive (like music playing while you navigate). 🔹 MPA (Multi‑Page Application) - Examples: Amazon, Wikipedia. - Each click fetches a new HTML document from the server. - Simpler, more resilient, better for SEO and initial load times. - No massive "all‑in‑one" JavaScript bundle. 🔹 The Modern Way (Best of Both) - Frameworks like Next.js combine the two. - Acts like an MPA for the first hit (fast, SEO‑friendly). - Behaves like an SPA once you start clicking (client‑side navigation). 💡 The Takeaway - Highly interactive apps (dashboards, games) → SPA. - Content‑heavy, ultra‑reliable apps (blogs, e‑commerce) → MPA. - Or mix both with modern frameworks for flexibility. #WebDevelopment #ComputerScience #Algorithms #CodingProject #TechEducation #FrontendDev #TypeScript #LearnInPublic #ReactJS #FrontendDeveloper #JavaScript #GitHubAPI #TailwindCSS #TechCareers #OpenToWork #OpenSource #FrontendEngineering #HiringDevelopers #Collaboration #GreatFrontEnd

241 package downloads in, and developers are already building real UI's with it. Here's everything I learned. I published a deep-dive on my blog at gwan.dev — a complete guide on pairing GWAN Design System with React Hook Form and Zod for bulletproof form validations. If you've ever written the same error state logic five times across five different inputs, this one's for you. What the article covers: → Setting up Zod schemas with TypeScript inference — write your validation once, get types for free → Wiring react-hook-form's register and formState directly into GWAN's Input, Checkbox, Select, and TextArea components → Displaying inline validation errors that respect GWAN's design tokens — consistent look across your entire app → Real-world patterns: async validation, dependent fields, and multi-step forms → How GWAN's controlled component API makes RHF integration feel native, not bolted on Why this stack works so well together: Zod gives you a single source of truth for your data shape. React Hook Form gives you performance. GWAN gives you the UI. None of them fight each other — they compose cleanly. The result is form code that's readable, maintainable, and looks good out of the box. 📖 Read the full guide: https://lnkd.in/gAnmSnRB 📦 Install GWAN: npm install gwan-design-system ⭐ 241 downloads and growing — thank you to everyone who's already using it. If you've built something with GWAN, I'd genuinely love to hear about it in the comments. If you like to contribute, I welcome your ideas in PRs. If you find the article useful, a share goes a long way for an indie open source project. 🙏 #ReactJS #NextJS #TypeScript #ReactHookForm #Zod #FormValidation #OpenSource #DesignSystem #WebDevelopment #FrontendEngineering #TailwindCSS

Next.js – The Future of Modern Web Development! Want to build lightning-fast, scalable, and SEO-friendly web apps? Next.js gives you everything you need—right out of the box. https://lnkd.in/d2Ktvz4k Follow us on our Facebook page What is Next.js? Next.js is a powerful React framework developed by Vercel that helps developers create high-performance web applications with ease. It combines the best of frontend and backend development in one place. Core Features: Server-Side Rendering (SSR): Better SEO and faster page load 🌐 Static Site Generation (SSG): Pre-render pages for speed 🔄 Incremental Static Regeneration (ISR): Update content without rebuilding the whole site File-based Routing: Simple and intuitive page structure Built-in Optimization: Image, font, and script optimization API Routes: Build backend endpoints inside your app Middleware Support: Control requests and responses easily Developer Experience: ✔️ Fast refresh for instant updates ✔️ TypeScript support ✔️ Easy deployment with Vercel ✔️ Scalable architecture Use Cases: ✔️ Blogs & Content Platforms ✔️ E-commerce Websites ✔️ SaaS Applications ✔️ Dashboards & Admin Panels Why Choose Next.js? Because it saves time, boosts performance, improves SEO, and scales as your project grows. 📌 Start building with Next.js today and bring your ideas to life! #NextJS #WebDevelopment #ReactJS #FullStack #Programming #JavaScript