How to Optimize React Performance with React DevTools

🚀 𝗩𝗶𝗿𝘁𝘂𝗮𝗹 𝗗𝗢𝗠 𝗶𝗻 𝗥𝗲𝗮𝗰𝘁 — 𝗧𝗵𝗲 𝗦𝗲𝗰𝗿𝗲𝘁 𝗕𝗲𝗵𝗶𝗻𝗱 𝗙𝗮𝘀𝘁 𝗨𝗜 𝗨𝗽𝗱𝗮𝘁𝗲𝘀 ⚡ Let’s talk about a cool feature in React: the Virtual DOM. It’s what helps React work so fast. 👉What is the Virtual DOM? The Virtual DOM is a simple copy of the real DOM. React first changes the Virtual DOM, then compares it with the old version (this is called "diffing"), and only updates the parts that are different in the real DOM. This makes updates quicker and smoother. 💡 Key Benefits: 1️⃣ Speed: React only changes what needs to be changed, not everything. 2️⃣ Efficiency: It makes updates faster, even in complex apps. 3️⃣ Predictability: It helps keep the app's look and feel consistent and smooth. ⚡ This smart approach avoids direct DOM manipulation, making React apps blazing fast and highly efficient. 🚀 #JavaScript #DOM #FrontendDevelopment #WebDevelopment #Coding #Programming #JavaScriptConcepts #JavaScriptDeveloper #LearnJavaScript #FrontendDeveloper

🚀 𝗩𝗶𝗿𝘁𝘂𝗮𝗹 𝗗𝗢𝗠 𝗶𝗻 𝗥𝗲𝗮𝗰𝘁 — 𝗧𝗵𝗲 𝗦𝗲𝗰𝗿𝗲𝘁 𝗕𝗲𝗵𝗶𝗻𝗱 𝗙𝗮𝘀𝘁 𝗨𝗜 𝗨𝗽𝗱𝗮𝘁𝗲𝘀 ⚡ Let’s talk about a cool feature in React: the Virtual DOM. It’s what helps React work so fast. 👉What is the Virtual DOM? The Virtual DOM is a simple copy of the real DOM. React first changes the Virtual DOM, then compares it with the old version (this is called "diffing"), and only updates the parts that are different in the real DOM. This makes updates quicker and smoother. 💡 Key Benefits: 1️⃣ Speed: React only changes what needs to be changed, not everything. 2️⃣ Efficiency: It makes updates faster, even in complex apps. 3️⃣ Predictability: It helps keep the app's look and feel consistent and smooth. ⚡ This smart approach avoids direct DOM manipulation, making React apps blazing fast and highly efficient. 🚀 #JavaScript #DOM #FrontendDevelopment #WebDevelopment #Coding #Programming #JavaScriptConcepts #JavaScriptDeveloper #LearnJavaScript #FrontendDeveloper

Directly manipulating the DOM in a React app is a problem. I recently saw someone append a toast directly to document.body in a React app and it rendered as [object Object]. The real issue wasn’t the syntax. It was the idea because in React, you’re not supposed to “touch” the DOM directly. React basically owns the DOM. It keeps a virtual copy of it (the virtual DOM), and every render, React diffs the changes and applies them efficiently. When you manually do something like... document.body.append(myDiv); ...you’re basically bypassing React’s control system. React has no idea that node exists. So next render, it might overwrite it, remove it, or just ignore it completely. That’s when you start seeing weird things happen: toasts that never disappear, duplicated elements, random layout shifts... Plus, you lose all of React’s benefits: - predictable UI - automatic cleanup - batched updates and memoization It’s fine if you’re integrating a non-React library (like a chart or a map), but in every other case, let React handle the DOM. That’s what it’s really good at. If you want to render something dynamically, do it declaratively by wrapping it in a context and render it via state. It’s cleaner, safer, and React stays in control. #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #ReactTips

This project helped me understand how JavaScript manages data and updates the UI in real time. Key things I learned today: Adding and removing tasks dynamically Handling user input efficiently Updating the DOM based on user actions Improving code structure with reusable functions Understanding how small features improve user experience Building this app showed me how JavaScript can manage real-world interactions and make a webpage feel alive. Step by step, my confidence as a developer is growing. 🚀 #WebDevelopment #JavaScript #FrontendDevelopment #ToDoList #CodingJourney #LearningInPublic #BuildInPublic #FullStackDeveloper #TechCommunity

React Virtual DOM and Beyond : A Deep Dive Series React changed how we build UIs by introducing the Virtual DOM, but have you ever wondered what really happens under the hood? How does React figure out what changed? Why is diffing so efficient? And what happens after the Virtual DOM, inside Fiber, Concurrency, and React’s next evolution? Over the next few weeks, I’ll be publishing a 3-part series exploring how React evolved from a simple declarative model into a concurrent, reactive runtime. Here’s the journey ahead Part 1 — Demystifying the Virtual DOM (Live now) Part 2 — Inside React Fiber (Nov 17) Part 3 — Beyond the Virtual DOM (Nov 24) In Part 1, I dive into how React turns declarative UI into efficient updates through rendering, reconciliation, diffing and why this model changed frontend engineering forever. Read Part 1 on Medium : https://lnkd.in/dJQF-HvW If you’ve ever wondered what really happens when you call setState(), this series is for you. #React #JavaScript #FrontendDevelopment #VirtualDOM #Rendering #ReactInternals #WebPerformance

𝗞𝗲𝗲𝗽 𝗬𝗼𝘂𝗿 𝗥𝗲𝗮𝗰𝘁 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀 𝗖𝗹𝗲𝗮𝗻 & 𝗦𝗰𝗮𝗹𝗮𝗯𝗹𝗲! A well-structured folder layout can save hours of confusion and debugging. Here’s the structure I swear by: 📂 pages – Route-based views 📂 components – Reusable UI building blocks 📂 hooks – Custom logic for cleaner code 📂 contexts – Shared state across the app 📂 layouts – Wrappers like headers, sidebars, etc. 💬 Curious to hear what structure you use in your React apps. Let’s share and learn together! 📚 Great resources to level up => W3Schools.com => JavaScript Mastery Credit: PDF owner Follow Gaurav Patel for more related content. 🤔 Having Doubts in the technical journey? #ReactAppStructure #CleanCode #FrontendTips #ReactBestPractices #DevCommunity

Treating React state like a regular variable is dangerous. It’s the fastest way to create bugs that make you lose your mind. If your new React state depends on the current state, you have to use the functional form. Everybody knows this… until they don’t. Take the classic toy example: setCount(count + 1) setCount(count + 1) Of course this is a stupid example. Nobody writes code that obviously wrong in real life. But it’s perfect for explaining the core idea: both calls read the same stale count, React batches them, and you don’t get the result you expect. In reality, the mistake hides inside much bigger code. A couple of effects. An event handler or two. Some async calls. A hook that depends on another hook. And suddenly you’re updating state “based on the current state” without even realizing it. That’s when things get tricky: unexpected toggles, missed increments, UI that feels “off by one,” or some weird race condition that only happens when your user clicks fast. The rule stays simple: If the new state is calculated from the old state, use the functional form. Always. setCount(prev => prev + 1) That’s how you avoid all the subtle bugs that only show up when your app gets reactive, event-driven, and real. React state isn’t a variable you overwrite. It’s a timeline of transitions. Once you treat it that way, the weird stuff stops happening. Been there? Tell me. Curious to hear your worst React state surprises. #ReactJS #JavaScript #WebDevelopment #CodingTips #SoftwareEngineering #ReactHooks

Day 56 — Introduction to React.js: Building the Foundation of Modern Frontends Today marks the beginning of my journey into React.js, one of the most powerful JavaScript libraries for building interactive and dynamic user interfaces. ⚛️ I learned how React efficiently manages UI updates using the Virtual DOM, how everything in React revolves around components, and how JSX brings HTML-like syntax into JavaScript for seamless UI creation. I also set up my React environment using Vite (faster alternative to CRA) and explored the initial folder structure — getting hands-on with my first React component. 🧩 Key Concepts Covered What is React and why it’s component-based Virtual DOM vs Real DOM JSX syntax and rendering React project setup using npm create vite@latest my-app Folder overview: src, App.jsx, and index.jsx ⚙️ Sample Code: Hello React Component function App() { return ( <div> <h1>Welcome to React 🚀</h1> <p>Building interactive UIs made simple!</p> </div> ); } export default App; 🎯 Next Up Tomorrow, I’ll dive into Functional Components & Props — the building blocks of modular UI design. #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #LearningJourney #ReactBeginners #Vite #CodingCommunity #UIUX #TechGrowth #100DaysOfCode #cfbr

Code cleaner. Render faster. React’s built-in state tools win the game. ⚛️ 👇 🧩 Modern React simplifies state management like never before — replacing heavy Redux setups with native, lightweight tools that improve performance and scalability. ❌ Old Redux Pattern: Multiple files, complex boilerplate, and larger bundles. ✅ Modern React State: Simple for clean, predictable global state. ✨ Key Highlights: ⚡ Lightweight global state handling — no Redux required 🚀 Faster performance with fewer re-renders 💡 Perfect for small-to-medium React.js and Next.js 14+ projects 🔒 Built-in hooks and no external dependencies 🧠 Cleaner architecture and improved developer experience 📈 Boost app speed, maintainability, and scalability React 19 and Next.js are redefining how developers write front-end code — less setup, more focus on UI and user experience. #React19 #ReactJS #Nextjs14 #FrontendDevelopment #JavaScript #WebDevelopment #ReduxToolkit #ReactContext #ModernReact #FrontendEngineer #CodingBestPractices #WebPerformance #CleanCode #UIUXDesign #WebDeveloper #JSFrameworks #CodeOptimization #DeveloperExperience

🚀 Just watched an absolutely brilliant talk on Modern React Patterns by Aurora Scharff — and my mind is blown! 🤯 If you’re building apps with React 19 or Next.js 15, this is a must-watch session. Aurora breaks down the latest concurrent rendering features with clear, real-world demos that instantly click: ⚡ useTransition – Keep your UI buttery-smooth during updates ✨ useOptimistic – Create instant, snappy user interactions 🎯 useDeferredValue – Fix laggy inputs without overcomplicating logic 🎬 ViewTransition – Bring native-like page transitions to React apps What I loved most: it’s not just theory — she shows practical, modern patterns that you can apply right now to make your React apps feel fast and delightful. Check the links in the comments. 💬 Have you tried any of these new hooks or patterns yet? What’s been your experience with useOptimistic or ViewTransition so far? Let’s share ideas! #React #NextJS #JavaScript #WebDevelopment #Frontend #React19 #ConcurrentReact #ReactPatterns #Performance #UIUX #DeveloperExperience #TechCommunity #Coding #SoftwareEngineering