Mastering JavaScript Event Loop with Microtasks and Macrotasks

🚫 Stop using querySelector in React! In React, you shouldn’t manipulate the DOM like we do in plain JavaScript (querySelector, getElementById, etc.). Why? Because React uses a Virtual DOM and manages the real DOM for you. Direct DOM manipulation can lead to bugs and unexpected behavior. ✅ The right approach: useRef useRef gives you safe and direct access to a DOM element while staying aligned with React’s lifecycle. ✨ Benefits: Cleaner code Predictable components Easier maintenance Think in React way, not JavaScript way 😉 #React #JavaScript #WebDevelopment #Frontend #CleanCode #ReactHooks #Learning

𝐃𝐚𝐲 𝟒 𝐨𝐟 𝐮𝐧𝐟𝐨𝐥𝐝𝐢𝐧𝐠 𝟙𝟝 𝐦𝐚𝐣𝐨𝐫 𝐜𝐨𝐧𝐜𝐞𝐩𝐭𝐬 𝐨𝐟 𝐑𝐞𝐚𝐜𝐭 One of the main reasons we use React is that we don’t manually interact with the DOM. React manages updates efficiently on our behalf. Instead of directly re-rendering the real DOM, React uses the 𝐕𝐢𝐫𝐭𝐮𝐚𝐥 𝐃𝐎𝐌 for better performance. React provides special functions called 𝐇𝐨𝐨𝐤𝐬 that control component behavior and DOM interaction. One important hook is 𝐮𝐬𝐞𝐒𝐭𝐚𝐭𝐞. It is used to store and manage data (state) inside a component. When the state value changes, React automatically re-renders the component and updates only the necessary parts of the DOM. Learning one concept at a time to build a strong foundation in React. #ReactJS #WebDevelopment #LearningInPublic #ReactHooks #VirtualDOM #Frontend #JavaScript

useEffect is one of the most misunderstood hooks in React. It’s not for: • calculating derived values • syncing state with state • fixing re-render issues It is for: • data fetching • subscriptions • timers • syncing with browser or external systems If something can be calculated from existing state or props, it doesn’t belong in useEffect. The less effects you write, the more predictable your React code becomes. #react #frontend #javascript #webdev #cleanCode

Hot take (but true): React is not hard. JavaScript is. 👍If you don’t understand closures, useDebounce is just copy-paste magic. 👍If you don’t understand reference vs value, your useEffect dependencies will re-run forever and you’ll blame React.  👍If you don’t understand event loop & async behavior, useEffect, promises, and state updates will feel “random”. Most React performance issues are JavaScript knowledge gaps, not React problems. Frameworks don’t replace fundamentals. They amplify them. Learn JavaScript deeply first. React will suddenly feel… simple. #reactjs #javascript #frontend #softwareengineering #careeradvice

Hot take (but true): React is not hard. JavaScript is. 👍If you don’t understand closures, useDebounce is just copy-paste magic. 👍If you don’t understand reference vs value, your useEffect dependencies will re-run forever and you’ll blame React.  👍If you don’t understand event loop & async behavior, useEffect, promises, and state updates will feel “random”. Most React performance issues are JavaScript knowledge gaps, not React problems. Frameworks don’t replace fundamentals. They amplify them. Learn JavaScript deeply first. React will suddenly feel… simple. #reactjs #javascript #frontend #softwareengineering #careeradvice

Closures in JavaScript — Explained Simply A lot of people use closures without actually understanding them. So let’s kill the confusion. What’s a Closure? A closure is just a function that remembers the variables from where it was created, even after that outer function has finished running. Think of it like this The inner function carries a backpack Inside that backpack → variables from the outer scope. #JavaScript #Closures #WebDevelopment #Frontend #ReactJS #LearningInPublic #JavaScriptBasics

🚀 Understanding the useEffect Hook in React useEffect is a powerful hook used to handle side effects in functional components, such as: API calls Subscriptions & event listeners Timers Cleanup on unmount Key concepts covered ✔️ Mount → runs after initial render ✔️ Update → re-runs when dependencies change ✔️ Unmount → cleanup to prevent memory leaks ✔️ Dependency array → controls when the effect runs Strong understanding of hooks leads to cleaner, scalable, and more predictable React applications. #ReactJS #useEffect #FrontendDevelopment #JavaScript #WebDevelopment #ReactHooks #SoftwareEngineering #LearningJourney

Hoisting vs Closures in JavaScript 🚀 Understanding JavaScript fundamentals makes your code predictable and powerful. 🔹 Hoisting moves declarations to the top of their scope (not initializations). 🔹 Closures allow functions to remember and access variables from their outer scope, even after execution. 👉 In short: Hoisting lifts declarations, Closures preserve state. Mastering these concepts helps you write cleaner, bug-free, and more efficient JS code. #JavaScript #WebDevelopment #Frontend #CodingConcepts #JSBasics #LearnJavaScript #Developer

Custom Hooks are one of those React features that can significantly enhance your codebase. If you find yourself duplicating the same useEffect, state, or API logic across components, it's a clear indication that you should create a custom hook. In just three simple steps, you can: • Extract reusable logic • Keep components clean • Improve readability and maintainability This approach scales effectively for real-world applications and simplifies testing and reasoning about your code. Pro tip: If your component is doing too much, it’s likely time for a hook. Save this for later and share it with someone learning React. #ReactJS #FrontendDevelopment #JavaScript #WebDev #ReactHooks #CleanCode #DevCommunity 

💡 What is Lit.js? As part of my journey learning Lit.js, here’s how I currently understand it: Lit is a JavaScript library built on top of 𝐖𝐞𝐛 𝐂𝐨𝐦𝐩𝐨𝐧𝐞𝐧𝐭𝐬 that helps you create: • 𝗥𝗲𝘂𝘀𝗮𝗯𝗹𝗲 𝗨𝗜 𝗰𝗼𝗺𝗽𝗼𝗻𝗲𝗻𝘁𝘀 • 𝐖𝐢𝐭𝐡 𝐩𝐥𝐚𝐢𝐧 𝐇𝐓𝐌𝐋 & 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭 • 𝐖𝐢𝐭𝐡𝐨𝐮𝐭 𝐛𝐞𝐢𝐧𝐠 𝐥𝐨𝐜𝐤𝐞𝐝 𝐢𝐧𝐭𝐨 𝐚 𝐟𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤 What stood out to me: ✅ Very small and fast ✅ Uses web standards ✅ Works with any framework (or none) It feels like a great option for design systems and long-term maintainability. Have you explored Lit.js or Web Components yet? 👇 #LitJS #WebComponents #FrontendDevelopment #JavaScript