How to Use Intersection Observer API for Web Performance

🚀 Stop Writing Long DOM Code! DominatorJS Makes It Effortless 🎉 I just shared a new example: “Create a Dynamic Dropdown with DominatorJS” Here’s what you’ll see in action: ✅ Build a dynamic dropdown from a JavaScript array ✅ Attach event listeners directly in the configuration object ✅ Simplify DOM manipulation without messy code 💡 DominatorJS empowers developers — beginners or pros — to create interactive UI elements faster and smarter. 🎥 Watch the demo in this short video 👇 (screenshot/video attached) …and download the full source code to try it yourself here: https://lnkd.in/dANZEZdg #DominatorJS #WebDevelopment #CongoDevelopers #JavaScript #Frontend #LearningByDoing #OpenSource #CodeSmart #Productivity

I guess one of the first software programs I interacted with as a kid was Winamp ⚡, intrigued by bar sounds and how they react to different sounds. It's impressive how easy it is to recreate this behavior in JavaScript. On this website (https://lnkd.in/dqSEChiN), I show how we can display sound bars based on microphone input. And of course, here is the codebase: https://lnkd.in/dc2emKGp #JS #javascript #frontend #webdevelopment #webdev

📋 Project Showcase: React To-Do List Application ⚛️ ✨ Key Features: ✏️ Dynamic task creation with validation ✏️ Inline editing and real-time completion tracking ✏️ Persistent storage using localStorage ✏️ Responsive design with Tailwind CSS ✏️ Robust error handling and accessibility-focused UI ✏️ Built with React Hooks (useState, useEffect, useRef) Through this project, I reinforced my understanding of core React concept — from component structure and props to efficient state and event handling. Always building, always learning.🎯 📂 GitHub Repository:https://lnkd.in/gnMTseZb #ReactJS #JavaScript #WebDev #FrontendDevelopment #MERNStack

Efficiency & Modern Standards Centering a div used to be the subject of a thousand memes. But CSS has evolved, and so should our methods! While Flexbox is still a workhorse, the modern approach using CSS Grid is incredibly clean and efficient. Forget three lines of code. Now, you can achieve perfect horizontal and vertical centering with just one line on the parent container: "CSS place-items: center;" It's an instant win for code readability and maintainability. In modern frontend development with frameworks like React and Next.js, small efficiencies like this add up to a significant impact on your overall codebase. Stay current, write less, and ship faster. Follow Abir Mahmud for more modern CSS and clean code tips! #CSS #Frontend #WebDevelopment #ReactJS #NextJS #CleanCode #CodewithAbir

🎯 A Little Story About JavaScript Events While working on a UI feature recently, I was thinking about how neatly JavaScript handles user interactions — especially through event flow. Imagine this 👇 You click a button inside a card component. The click first triggers on the button... but somehow, the parent card also reacts. That’s not magic — that’s Event Bubbling in action. In bubbling, the event starts at the target element and travels up through all its ancestors until it reaches the top of the DOM. There’s also the opposite path — Event Capturing — where the event moves down from the root to the target. You can enable this phase using: element.addEventListener("click", handler, true); And sometimes, you just want that click to stay right where it happened — no parents involved. That’s when event.stopPropagation() steps in to save the day ✋ Understanding how events travel through the DOM makes handling complex interfaces so much smoother. It’s one of those core concepts that quietly powers every interactive web experience we build. #JavaScript #Frontend #WebDevelopment #Coding #TIL

💡 Understanding React Props!💡 Clean Code = Clean UI When working with React, Props (short for Properties) are one of the most powerful ways to make your components reusable, dynamic, and clean. 🌟 Benefits of Using Props ✅ Makes components reusable ✅ Keeps your code DRY (Don’t Repeat Yourself). ✅ Easier to maintain and scale ✅ Improves readability and structure 💡 Quick Prop Tips 🔹 Destructure props for cleaner syntax 🔹 Use PropTypes or TypeScript for type safety 🔹 Pass only the data each component needs 🔹 Combine props with map() for dynamic rendering 💬 Question for you: What’s your favorite trick to keep React components clean and reusable? Drop your thoughts 👇 🔜 Next Post: Mastering State Management in React: When to use useState vs useReducer. #ReactJS #FrontendDevelopment #JavaScript #CleanCode #WebDevelopment #ReactProps #ReusableComponents #TypeScript #WomenInTech #ReactTips #CodingBestPractices #rabiaehsan

#React Hooks Deep Dive: #useEffect vs #useLayoutEffect Ever wondered what actually happens between React re-rendering and what you see on the screen? Here’s the sequence — simplified and visual 👇 ⚛️ When React updates your component: 1️⃣ Render (Reconciliation) React calls your component function and prepares virtual DOM updates — in memory. 2️⃣ Commit Phase React applies those updates to the real DOM — but nothing is visible yet. 3️⃣ useLayoutEffect runs now This hook fires after the DOM updates but before the browser paints. 👉 Perfect for measuring or synchronously modifying the DOM. 4️⃣ 🎨 Browser Paints The browser finally draws the UI — the user now sees the result. 5️⃣ ⏱️ useEffect runs This happens after paint, great for async tasks like fetching data, logging, etc. 💡 Key takeaway: useLayoutEffect runs before the component is rendered on screen (painted), but after the DOM has been updated. #ReactJS #JavaScript #Frontend #WebDevelopment #ReactHooks #useEffect #useLayoutEffect #WebPerformance

🚀 Mastering useEffect in React If you’ve ever wondered why your component keeps re-rendering, or how to handle side effects properly, useEffect is your best friend (when used right!). 🧠 What is useEffect? useEffect lets you perform side effects in functional components — like fetching data, updating the DOM, or setting up event listeners. 💡 Basic Syntax useEffect(() => { // Side effect logic here return () => { // Cleanup (optional) }; }, [dependencies]); ⚙️ Dependency Array Explained [] → runs only once (on mount) [variable] → runs when variable changes (no array) → runs after every render 🧩 Common Use Cases ✅ Fetching data from an API ✅ Subscribing / unsubscribing to events ✅ Managing timers or intervals ✅ Syncing state with localStorage ⚠️ Avoid These Mistakes ❌ Forgetting the dependency array ❌ Updating state inside useEffect without proper dependencies (infinite loop alert 🚨) ❌ Not cleaning up event listeners or intervals 🌱 Pro Tip Always think of useEffect as a lifecycle tool — it replaces componentDidMount, componentDidUpdate, and componentWillUnmount from class components. #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #ReactHooks #useEffect

JavaScript Promise.race() — When Speed Matters! Sometimes, you don’t need all async tasks to finish — you just want the fastest one’s result That’s where Promise.race() comes in! 💡 Definition: Promise.race() takes an array of promises and returns the result of the first one that settles (either resolved or rejected). 🧩 Example: const fast = new Promise((resolve) => setTimeout(() => resolve("🚀 Fast task completed!"), 1000) ); const slow = new Promise((resolve) => setTimeout(() => resolve("🐢 Slow task completed!"), 3000) ); Promise.race([fast, slow]) .then((result) => console.log("Winner:", result)) .catch((error) => console.error("Error:", error)); ✅ Output: Winner: 🚀 Fast task completed! Even though the slow promise finishes later, the first one decides the result. Why Use It? ✅ Get quick responses from multiple sources ✅ Useful in timeout or failover situations ✅ Improves user experience by reacting faster 🔖 #JavaScript #PromiseRace #AsyncProgramming #WebDevelopment #Frontend #JSConcepts #CodingTips #100DaysOfCode #KishoreLearnsJS #WebDevCommunity #DeveloperJourney #AsyncAwait

I used to always hear people say “React’s key prop helps React tell elements apart.” I kind of understood it… but it always felt like a vague explanation. Then I thought about how we do things in plain JavaScript. When you dynamically render elements in the DOM, you usually have to give each one a unique id or data-id — so you can update or delete that specific element later. That’s basically what React is doing behind the scenes with the key prop. It uses key to know which list items match between renders, so it can update, move, or remove elements without re-creating everything. So this: {items.map(item => <li key={item.id}>{item.name}</li>)} is kind of the React equivalent of this: li.dataset.id = item.id; Once I connected it to how we handle things in pure JS, the whole “key” concept suddenly made perfect sense 😄 #javascript #reactjs #frontend #webdevelopment