How to use Tree Shaking and Code Splitting for web performance

🚀 Next.js made simple! Get your hands on the ultimate Next.js Cheat Sheet, your go-to guide for mastering routing, navigation, styling, data fetching, and optimization. Whether you’re building your first app or refining a production-ready project, this quick reference by Jonas Herrmannsdörfer will help you streamline your workflow and build high-performance web applications faster than ever. 👉 Read now on JavaScript Magazine and take your Next.js skills to the next level! 🔗 https://lnkd.in/ereShKW2 #NextJS #ReactJS #WebDevelopment #Frontend #JavaScript #WebDevTips #JSCommunity

 💠React Hooks React Hooks completely changed the way we build React apps no more messy class components or lifecycle confusion. Hooks make our code cleaner, faster, and much easier to reason about. 🔸useState gives your component a way to remember data between renders. It’s used for things like tracking user input, toggles, counters. 🔸use Effect handles side effects anything that happens outside the component’s pure rendering, like fetching data, updating the DOM, or setting timers. 🔸use Ref gives you access to DOM elements or mutable values that don’t trigger re-renders. 🔸use Context lets you share data globally like user info, theme, or language without passing props everywhere. 🔸use Memo helps you remember expensive results so React doesn’t recalculate unnecessarily. 🔸use Callback prevents your functions from being recreated on every render (which can cause performance issues). #ReactJS #WebDevelopment #Frontend #JavaScript #ReactHooks #CodingJourney #LearnWithMe

Hello Devs, I just played around with 𝗡𝗲𝘅𝘁.𝗷𝘀 𝟭𝟲, and thought I’d share a quick take for anyone building websites or apps. What’s solid in this release: -> The new bundler Turbopack is now the default —> expect significantly faster builds and hot-reloads. -> There’s a new “Cache Components” model (using a "use cache" directive) that gives you much more explicit control over caching of pages/components. -> Routing/navigation got smarter: shared layouts are deduplicated, prefetching is more efficient, so your app feels snappier. -> Dev-experience improvements: better logging, new DevTools with context-aware insights, clearer debug paths. 𝗪𝗵𝗮𝘁 𝘆𝗼𝘂 𝘀𝗵𝗼𝘂𝗹𝗱 𝘄𝗮𝘁𝗰𝗵: If your project is already in production on v14 or v15 and working fine, migrating isn’t zero cost. -> Some of the big features (e.g., custom Build Adapters) are still alpha or experimental —> so they might not be stable for every use case. -> You’ll want to make sure your environment meets the new minimums (Node version, TypeScript version, etc.) to avoid surprise issues. 𝗦𝗵𝗼𝘂𝗹𝗱 𝘆𝗼𝘂 𝘂𝗽𝗴𝗿𝗮𝗱𝗲 𝗻𝗼𝘄? In my view: yes, ->if you’re starting a new app ,it gives you a strong performance baseline and future-proofing. -> If you’re maintaining a large legacy app that’s stable, I’d treat this upgrade like a planned iteration: allocate time for testing, migration, and verifying that everything works with your stack. -> If you’re somewhere in between (mid-size project, several dependencies), maybe spin up a branch, test the upgrade, see what breaks and what benefits you get before committing fully. #Nextjs16 #Nextjs #WebDevelopment #FrontendDev #React #Performance #DeveloperExperience #JavaScript #TypeScript #Vercel #JS #MVC #LLM

𝐮𝐬𝐞𝐌𝐞𝐦𝐨 𝐚𝐧𝐝 𝐮𝐬𝐞𝐂𝐚𝐥𝐥𝐛𝐚𝐜𝐤 𝐢𝐧 𝐑𝐞𝐚𝐜𝐭 At one point, I used useMemo and useCallback everywhere thinking they would automatically boost performance. But the opposite happened the app slowed down. After profiling the code, I realized something important: These hooks don’t make React faster by default they simply help avoid unnecessary recalculations or function recreations. The real challenge wasn’t React it was 𝐨𝐯𝐞𝐫-𝐨𝐩𝐭𝐢𝐦𝐢𝐳𝐢𝐧𝐠 𝐰𝐢𝐭𝐡𝐨𝐮𝐭 𝐮𝐧𝐝𝐞𝐫𝐬𝐭𝐚𝐧𝐝𝐢𝐧𝐠. Here’s what made things clear 👇 - 𝐮𝐬𝐞𝐌𝐞𝐦𝐨 → For expensive calculations that shouldn’t run on every render. - 𝐮𝐬𝐞𝐂𝐚𝐥𝐥𝐛𝐚𝐜𝐤 → For functions passed as props, preventing unwanted child re-renders. Now, I use them intentionally, not by habit. If there’s no actual performance issue I skip them. Because clarity always beats premature optimization. Sometimes, writing better React code isn’t about adding more hooks it’s about knowing when not to use them. #ReactJS #WebDevelopment #Frontend #Performance #JavaScript #LearningJourney #CleanCode

Let’s Talk About One of the Most Important React Hooks: useEffect When I first started using React Hooks, useEffect was the most confusing one 😅 It looked simple — but then I realized how a missing dependency can break everything! useEffect is one of the most powerful React Hooks. It allows your component to perform side effects — like fetching data, updating the DOM, setting up subscriptions, or syncing state with external systems. In short, it gives your component “life” beyond just rendering UI. Here’s what I learned: Always include all variables your effect depends on. Avoid using it for logic that should happen on every render. Clean up your effects (return a function). useEffect isn’t just for fetching data — it’s about managing side effects, lifecycle, and performance in a clean, declarative way. #React #Frontend #WebDevelopment #JavaScript #ReactHooks #Learning

🚀 Solving the “Too Many API Calls” Problem Using React Hooks If you’ve ever built a live search feature in React, you’ve probably noticed a common issue — every keystroke triggers an API call 😅. This can easily overwhelm your backend and slow down the user experience. To solve this, I implemented a debounced search box using React’s useState and useEffect hooks. 💡What it does: Waits for the user to stop typing (500ms delay) before making an API request Cancels the previous timer on each keystroke to avoid redundant calls Keeps the UI responsive and the API efficient Here’s the idea in action 👇 This small optimization makes a big difference — your search stays fast while your API breathes easy. Have you used debouncing or throttling in your projects? How did it impact performance? #ReactJS #JavaScript #FrontendDevelopment #WebPerformance #APIDesign #CodingTips #useEffect #ReactHooks

🚀 Solving the “Too Many API Calls” Problem Using React Hooks If you’ve ever built a live search feature in React, you’ve probably noticed a common issue — every keystroke triggers an API call 😅. This can easily overwhelm your backend and slow down the user experience. To solve this, I implemented a debounced search box using React’s useState and useEffect hooks. 💡What it does: Waits for the user to stop typing (500ms delay) before making an API request Cancels the previous timer on each keystroke to avoid redundant calls Keeps the UI responsive and the API efficient Here’s the idea in action 👇 This small optimization makes a big difference — your search stays fast while your API breathes easy. Have you used debouncing or throttling in your projects? How did it impact performance? #ReactJS #JavaScript #FrontendDevelopment #WebPerformance #APIDesign #CodingTips #useEffect #ReactHooks

🚀 React Re-Renders — Explained Visually! Ever wondered *why your React components re-render even when you didn’t expect them to? This post breaks it down — not with theory, but with visuals ⚡ Here’s what you’ll learn 👇 ✅ What actually triggers a re-render ✅ When it becomes a performance bottleneck ✅ Smart ways to prevent unnecessary renders ✅ The right way to measure your optimizations 💡 React’s rendering behavior isn’t the villain — uncontrolled re-renders are. Once you master this, your apps feel buttery-smooth and blazing fast ⚛️ 📚 Part of my ongoing #MERNSeriesGuide — sharing real-world insights from my sessions and projects. 👇 Dive into the slides and let me know: What’s YOUR favorite React optimization trick? #ReactJS #MERNStack #WebDevelopment #Frontend #JavaScript #ReactPerformance #ReactHooks #Learning #Developers #CodingCommunity #VamsiPaidi #ReactTips #UseMemo #ReactOptimization

💡 Problem: When rendering large lists, React often re-renders the entire list — even if only one item changes. Result? ⚠️ Lag, dropped frames, and sluggish UIs. But here’s the truth 👇 React isn’t slow — uncontrolled re-renders are. 🎯 Real optimization starts with render control. When your lists grow, use React’s built-in tools to keep updates efficient: ✨ Key Insights for Smooth React Performance ⚡ Use unique IDs as keys (not array indexes!) 🧠 Wrap static components with React.memo() 🔁 Pair with useCallback() to keep event handlers stable 🚀 Perfect combo for React 18+ / Next.js 14+ — especially in list-heavy dashboards These aren’t “micro-optimizations” — they’re what make production-grade React apps stay lightning fast ⚡ Keep your renders predictable, your UIs smooth, and your users happy. 😎 #ReactJS #NextJS #WebPerformance #FrontendDevelopment #ReactOptimization #WebDev #JavaScript #SoftwareEngineering #React19 #Nextjs14 #FrontendDevelopment #WebDevelopment #CleanCode #PerformanceOptimization #ReactHooks #ModernReact #FrontendEngineer #CodeOptimization

⚛️ React Just Made Form Actions So Much Cleaner The new useActionState hook is a game-changer for handling async form submissions. No more juggling useState, useEffect, or endless try/catch blocks. 🙌 Here’s how it works 👇 🧩 You provide: A form action (e.g., addToCart) An initial state And React gives you back: 1️⃣ The latest state (like a message or result) 2️⃣ A wrapped form action (formAction) 3️⃣ A flag showing if it’s still running (isPending) This means your form logic becomes simpler, more declarative, and much easier to read. Just write the action, hook it up, and React handles the rest. A small API — but it makes a big difference for building clean, async-ready UIs. ⚡ 💬 Have you tried useActionState yet? What do you think about React’s new declarative direction? #ReactJS #JavaScript #WebDevelopment #Frontend #ReactHooks #CleanCode Dhruv Patel (Borad)