React Hooks Simplify UI Management with Single State

React fundamentals to get right early Understanding onClick and onChange is key to handling events correctly in React A common pattern to be aware of: onClick={handleClick(id)} This executes immediately during render --- Correct approach: onClick={() => handleClick(id)} This runs only when the user clicks --- Why? React expects a function reference, not a function call - handleClick → correct - handleClick() → executes immediately --- Same concept applies to onChange: onChange={handleChange(value)} // executes immediately Better: onChange={(e) => handleChange(e.target.value)} --- Simple rule: If you need to pass arguments → use an arrow function --- Things to watch out for: - Functions running on every render - Unintended API calls - Difficult-to-debug behavior --- Benefits of correct usage: - Runs only on user interaction - More predictable component behavior - Cleaner and maintainable code --- Additional note: onClick={handleClick} (if your function expects arguments) This may result in "undefined" --- Example: {users.map(user => ( <button onClick={() => handleClick(user.id)}> Click </button> ))} --- Focusing on fundamentals like this helps build more reliable React applications #ReactJS #JavaScript #Frontend #WebDevelopment

"I started learning React JS." "You finished JavaScript right?" "..." "You finished JavaScript right?" This meme hurts because it is true. Every week someone asks me why React feels so confusing. Why state management makes no sense. Why useEffect keeps behaving unexpectedly. Why everything feels like magic they cannot control. Almost always the answer is the same. They skipped JavaScript fundamentals and jumped straight to React. React is not a replacement for JavaScript. It is JavaScript. Every pattern in React — components, props, state, hooks, context — is built on JavaScript concepts that feel obvious when you know the language and mysterious when you do not. If you are struggling with React right now, here is the honest advice: Stop. Go back to JavaScript. Spend two to four weeks on the fundamentals. Closures, promises, async/await, array methods, destructuring, and how the event loop works. Then come back to React. It will feel completely different. The time you spend on JavaScript fundamentals is not a detour. It is the fastest path to actually understanding React. Did you learn JavaScript properly before React or did you skip ahead and regret it? #JavaScript #React #WebDevelopment #Developers #ProgrammerHumor #LearningToCode #Frontend

🎯 useEffect vs useLayoutEffect: finally made it clear While learning React hooks, I was confused between useEffect and useLayoutEffect. This visual helped me understand the real difference 👇 👉 useLayoutEffect 1. Runs synchronously 2. Executes before the browser paints the UI 3. Useful when you need to measure or update the DOM before it becomes visible 👉 useEffect 1. Runs asynchronously 2. Executes after the UI is painted 3. Best for API calls, timers, subscriptions, etc. 💡 Key takeaway: 1. useLayoutEffect → blocks paint (use carefully) 2. useEffect → doesn’t block UI (preferred in most cases) Also learned how cleanup (destroy/unmount) works to avoid memory leaks especially with intervals and API calls. Small concepts like this make a big difference in writing better React code #ReactJS #WebDevelopment #Frontend #JavaScript #LearningInPublic #ReactHooks

🌐 What is DOM in React.js? Before understanding React deeply, it’s important to understand the DOM (Document Object Model). The DOM represents a web page as a tree structure, where every HTML element is a node that JavaScript can interact with. 🧠 In simple terms: 👉 DOM = Structure of your web page 👉 It allows you to read, update, style, and handle events ⚙️ How it works: When a browser loads a webpage: 1️⃣ HTML is parsed 2️⃣ Converted into a DOM tree 3️⃣ JavaScript can interact with it 🚀 Why it matters in React? Directly updating the DOM is slow and expensive. That’s why React uses: ✔ Virtual DOM ✔ Efficient updates ✔ Reconciliation to update only the changed parts of the UI 💡 Key Takeaway Understanding DOM is the first step to understanding how React actually works behind the scenes. Still learning. Still building. 🚀 — Anuj Pathak #reactjs #javascript #webdevelopment #frontenddevelopment #softwareengineering #developersoflinkedin #programming #techlearning #coding #learninginpublic

The 2026 Modern Frontend Developer Roadmap Feeling overwhelmed by the "JavaScript fatigue" or the endless stream of new frameworks? You’re not alone. The frontend landscape moves fast, but the secret to staying relevant isn't learning everything it’s learning the right things in the right order. I’ve put together this visual guide to help you navigate the journey from writing your first line of HTML to deploying production-ready applications. 📍 The Journey at a Glance: Stage 1: The Bedrock. Master HTML5, CSS3 (Flexbox/Grid), and Modern JavaScript (ES6+). Without these, frameworks are just magic boxes you don't understand. Stage 2: Version Control. Git isn't optional. Learn to branch, merge, and collaborate on GitHub early. Stage 3: The Ecosystem. Get comfortable with NPM/Yarn and build tools like Vite. Stage 4: Choose Your Path. React, Vue, or Angular? Pick one, master its lifecycle, and stick with it until you can build a full-scale app. Stage 5: Styling at Scale. Move beyond vanilla CSS with Tailwind CSS or Sass for professional, maintainable designs. Stage 6: Reliability. State management (Redux/Zustand) and Testing (Jest/Cypress) separate the hobbyists from the pros. Stage 7: Advanced Tooling. TypeScript is the industry standard for a reason. Combine it with an understanding of REST and GraphQL APIs. Stage 8: Deployment. It's not finished until it’s live. Master Vercel, Netlify, and the basics of CI/CD. 💡 My Advice: Don’t try to check every box in a week. Build projects at every stage. A "perfect" roadmap on paper is worth nothing compared to a "messy" project on GitHub. Which stage are you currently in? Or if you're a senior dev, what one tool would you add to this list? Let’s discuss in the comments! 👇 #WebDevelopment #Frontend #Coding #Programming #SoftwareEngineering #WebDevRoadmap #ReactJS #JavaScript #CareerGrowth

🚀 Day 1 to 5 of Learning React — Understanding JSX & Babel (Behind the Scenes) Today I explored how React actually works under the hood, and honestly… it’s pretty cool • What is JSX? JSX stands for JavaScript XML. It allows us to write HTML-like code inside JavaScript. Example: const element = <h1>Hello World</h1>; But here’s the catch Browsers don’t understand JSX directly • Role of Babel Babel is a transpiler that converts JSX into normal JavaScript. Above JSX becomes: React.createElement("h1", null, "Hello World"); So basically: • JSX → Babel → JavaScript → Browser • How React works behind the scenes React creates a Virtual DOM Instead of updating the real DOM directly (which is slow), React: 1. Creates a Virtual DOM (lightweight copy) 2. Compares changes (Diffing) 3. Updates only the changed parts (Reconciliation) • This makes React super fast Key Takeaway: React is not magic — it’s just smart optimization + JavaScript power. # Next: Diving deeper into Components & Hooks #ReactJS #WebDevelopment #JavaScript #LearningInPublic #Frontend #CodingJourney Vikas Kumar Prashant Pal Pratyush Mishra Prakash Sakari Likitha S Rajit Ram GeeksforGeeks

Most JavaScript developers use async features every day — setTimeout, fetch, Promises — but the behavior can still feel confusing until the Event Loop becomes clear. JavaScript runs on a single thread using a Call Stack. When asynchronous operations occur, they are handled by the runtime (browser or Node.js), and their callbacks are placed into a queue. The Event Loop continuously checks: 1️⃣ Is the Call Stack empty? 2️⃣ Is there a callback waiting in the queue? If the stack is empty, the next callback moves into the stack and executes. Example: setTimeout(() => console.log("A"), 0); console.log("B"); Output: B A Even with 0ms, the setTimeout callback runs after the current call stack clears. Understanding this small detail explains a lot of “unexpected” async behavior in JavaScript. Curious to hear from other developers here — What concept made the event loop finally “click” for you? #javascript #webdevelopment #nodejs #eventloop #asyncjavascript #reactjs #softwareengineering

🧠 Why does some JavaScript run instantly… and some runs later? Because JavaScript can be synchronous and asynchronous. 🔹 Synchronous JavaScript - JavaScript runs one line at a time. - Each task waits for the previous one to finish. Example: console.log("Start"); console.log("Middle"); console.log("End"); Output: Start → Middle → End ✅ Simple ❌ Can block execution 🔹 Asynchronous JavaScript - Some tasks don’t block execution. - They run in the background and return later. Example: console.log("Start"); setTimeout(() => { console.log("Async Task"); }, 2000); console.log("End"); Output: Start → End → Async Task 🔹 Why Async Exists Without async: - APIs would freeze the app - Timers would block everything - UI would become unresponsive 💡 Key Idea JavaScript is single-threaded, but it handles async using Web APIs + Call Stack + Event Loop (We’ll cover this next 👀) 🚀 Takeaway - Sync = step-by-step execution - Async = non-blocking execution Both are essential for real-world apps Next post: Event Loop Explained Simply 🔥 #JavaScript #AsyncJS #Frontend #WebDevelopment #LearnJS #Programming #LearningInPublic

🚀 Just Built a Random Advice Generator using JavaScript & API! I recently built a small project to practice JavaScript API integration. This project fetches random advice using the Advice Slip API and displays it in a simple responsive UI. 🔹 Features • Fetches advice using Fetch API • Uses Async / Await for API handling • Button loading state while fetching data • Random background color change 🎨 • Fully responsive design 📱 🛠 Tech Stack HTML • CSS • JavaScript • Fetch API 📡 API Used https://lnkd.in/dhQVZzs9 🌐 Live Demo 👉 https://lnkd.in/dPePU2n5 💻 GitHub Repository 👉 https://lnkd.in/dJ7nNPCe This project helped me improve my understanding of JavaScript API calls, async programming, and DOM manipulation. I’ll continue building more projects to strengthen my frontend development skills. #javascript #webdevelopment #frontenddevelopment #api #100DaysOfCode #coding