Next.js mistakes: client components, useEffect, cache, secrets, API routes

⚛️ React Concept: Lazy Loading Components As React applications grow, the bundle size also grows. Loading everything at once can slow down the initial page load. That’s where Lazy Loading helps. 🧠 What Lazy Loading does Instead of loading all components upfront, React can load components only when they are needed. This technique is called code splitting. 🚀 Why it matters ⚡ Faster initial load 📦 Smaller bundle size 🎯 Better performance for large applications 💡 Real-world example Pages like: 📊 Dashboard ⚙️ Settings 🛠️ Admin Panel don’t need to load until the user navigates to them. Lazy loading ensures these parts of the app are downloaded only when required. 🧠 Simple idea Load only what the user needs now, and fetch the rest when it’s needed. #React #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #CodeSplitting #PerformanceOptimization #LearnInPublic #SoftwareEngineering

Reducing Redundant API Calls in React One common mistake in React apps is calling the same API multiple times unnecessarily. This affects performance and user experience. Here are simple ways to avoid it: 1. Use proper dependency arrays in useEffect Avoid re-fetching on every render. 2. Cache data Reuse already fetched data instead of calling API again. 3. Use libraries like React Query They handle caching, refetching, and synchronization automatically. 4. Debounce user input Useful for search APIs to avoid multiple calls while typing. 5. Avoid duplicate calls across components Lift state up or use global state when needed. Reducing unnecessary API calls makes your app faster, cleaner, and more scalable. #reactjs #frontend #webdevelopment #performance #javascript

We often face performance issues when displaying huge lists in React. Apps slowing down, freezing, or lagging on scroll. This happens because React tries to render every item in the DOM at once which quickly becomes a bottleneck. Pagination or infinite scroll can help reduce the initial load but over time, DOM elements still accumulate, making scrolling sluggish. React-virtualized solves this by rendering only visible items, keeping the DOM light and scrolling smooth. For best results, combine it with pagination or infinite scroll. Fetch limited items from the server while virtualized rendering ensures performance, even with thousands of items. #React #WebDevelopment #FrontendDevelopment #JavaScript #ReactJS #UXDesign #WebApp #SoftwareEngineering #TechSolutions #MERNStack #UIUX #BusinessApps #fullstack #WebDevTips #CodeOptimization #FrontendEngineering

⚡ Why Next.js is the Ultimate Full-Stack Framework in 2026 If you're working with modern web apps, Next.js is more than just a framework it's a complete full-stack solution. Here’s why it stands out 👇 ⚡ SSR / SSG / ISR — Performance First → SSR (Server-Side Rendering): Fresh data on every request → SSG (Static Site Generation): Blazing fast static pages → ISR (Incremental Static Regeneration): Update pages without rebuilding the whole app 🧠 App Router + Server Components → Cleaner routing with the new App Router → Server Components reduce bundle size & improve performance → Better separation of client & server logic 🔐 Full-Stack Capabilities → Built-in API routes → Easy authentication integration → Handle frontend + backend in one place 👉 In short: You can build fast, scalable, and production-ready apps without switching tools. 👉 Drop your favorite Next.js feature below in the comments let’s learn from each other 👇 #NextJS #ReactJS #WebDevelopment #Frontend #FullStack #JavaScript #TechTrends #SoftwareEngineering #Performance #Developers

🚀 Why Developers Love Next.js API Routes Tired of managing separate frontend and backend projects? With Next.js API Routes, you can build full-stack applications in one place—clean, efficient, and powerful. 💡 Here’s a simple example: export default function handler(req, res) { res.status(200).json({ message: "Hello API" }); } ✨ What makes it awesome? No need for a separate backend server Easy handling of GET, POST, and other HTTP methods Perfect for authentication, database operations, and custom APIs Faster development workflow ⚡ 📍 Just place your file inside /pages/api/ and your endpoint is ready! Whether you're building a small project or a scalable app, Next.js API Routes simplify your backend logic like never before. #NextJS #WebDevelopment #FullStack #JavaScript #CodingLife

🎉 Excited to share my latest project: QR Code Maker! This web app lets you generate and download QR codes instantly from any URL. It’s built with Node.js, Express, and EJS, and styled to be fully responsive. Check out the live demo here: https://lnkd.in/dsSD8w8v Key highlights: Instant QR generation Responsive UI Download feature without storing files on the server Clean backend architecture #NodeJS #WebDevelopment #JavaScript #PortfolioProject #QRCode #FullStack

Stop building command palettes from scratch. I published @nobertdev/react-spotlight-search — a drop-in Cmd+K spotlight for React apps. 𝗪𝗵𝘆 𝗜 𝗯𝘂𝗶𝗹𝘁 𝗶𝘁: Existing solutions were either too heavy, too opinionated, or abandoned. I wanted something tiny, flexible, and that just works with whatever stack you're already using. 𝗪𝗵𝗮𝘁 𝘆𝗼𝘂 𝗴𝗲𝘁: ✅ Fuzzy search with keyword boosting ✅ Grouped, categorized actions ✅ Auto dark/light theme (shadcn, Tailwind, MUI compatible) ✅ Full keyboard navigation ✅ lucide-react & any icon library support ✅ Zero dependencies — ~4kb gzipped ✅ TypeScript first 𝗜𝗻𝘀𝘁𝗮𝗹𝗹 𝗶𝗻 𝘀𝗲𝗰𝗼𝗻𝗱𝘀: npm install @nobertdev/react-spotlight-search 📖 Live demo + docs: https://lnkd.in/ed4Tg7xY ⭐ GitHub: https://lnkd.in/e_CGM8N8 📦 npm: https://lnkd.in/eTu_rpQe If it saves you time, consider buying me a coffee, or a⭐ on GitHub would mean a lot! #ReactJS #OpenSource #Frontend #npm #TypeScript #WebDev #DeveloperTools

Someone just reached out to me about his client. He said his client "vibe coded" a Web3 website and the client only wants him to help deploy the app. But the tech stack isn’t a perfect match. I asked him what's the tech stack. He said, "HTML, CSS, JS, and backend in Node.js". 😂 Not even a template engine (MVT) just like that. Okay, I continued to ask him how they handled auth (authentication and authorization); he said "just local storage". Omoo, I can't stop laughing! The problem here is, it's not as if it won't work, but I bet the guy (client) will cry very soon. Did he just want to bypass paying a dev? Okay na, let's see how it goes. I asked this guy about his recommendation to the client; he said he already told him the app isn’t secured, but he insisted on going live and improving later on.

React 18 Server Components - Demystified React 18 introduced Server Components, and they’re more than just another feature - they fundamentally change how we think about building web apps. 💡 So, what are Server Components? They allow parts of your React app to run on the server instead of the browser. This means you can fetch data, access backend resources, and render UI before it even reaches the client. 🔥 Why does this matter? 1. Zero Bundle Impact   Server Components don’t ship JavaScript to the browser. Less JS = faster load times and better performance. 2. Direct Data Fetching   No more juggling APIs in `useEffect`. You can fetch data directly on the server, making your code simpler and more efficient. 3. Improved Performance   By offloading work to the server, the client does less heavy lifting—leading to faster interactions and smoother UX. 4. Better Separation of Concerns   You can clearly split your app into:  Server logic (data-heavy, secure)  Client logic (interactive UI) ⚖️ But it’s not all magic…  You need to think differently about state and interactivity  Not everything should be a Server Component  Requires frameworks (like Next.js) for full adoption React is no longer just “run everything in the browser.” It’s now about choosing where your code runs for maximum efficiency. Server Components help you build faster, leaner, and more scalable applications without sacrificing developer experience. #React #WebDevelopment #Frontend #JavaScript #SoftwareEngineering #React18 #NextJS

Modern React development is focused on performance visibility. And I found one interesting tool - React Scan https://react-scan.com/. It’s a lightweight tool that automatically detects performance issues in your React app — without requiring complex setup or deep profiling knowledge. It automatically tracks things like: - unnecessary re-renders - component update frequency  - inefficient component structures Example usage:  - CLI (no code changes) npx react-scan@latest http://localhost:3000 - Script tag <script crossOrigin="anonymous" src="//https://lnkd.in/evfJKd8f"></script>  - NPM integration npm install -D react-scan For modern React development — especially in complex apps — it’s a huge productivity boost. #react #frontend #webdev #performance #javascript #reactjs