React Re-renders: Separating Fact from Panic

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

Something new I learned about React today… I thought setState() updates immediately. But React batches state updates. Example: 👉 setCount(count + 1); 👉 setCount(count + 1); You might expect +2… But it becomes +1. Why? React queues updates and processes them together in the next render cycle. Both calls use the same previous count value. Why does React do this? Because DOM updates are expensive. Batching helps: ✅ Reduce unnecessary re-renders ✅ Improve performance ✅ Keep UI updates efficient Correct way when depending on previous state: 👉 setCount(prev => prev + 1); 👉 setCount(prev => prev + 1); 💡 Realization: State updates are scheduled, not instant. #ReactJS #JavaScript #FrontendDevelopment #WebDevelopment #SoftwareEngineering #CodingJourney #LearningInPublic #DeveloperLife #ReactInternals #FrontendEngineer #TechInterview #StateManagement

My approach to structuring React projects has changed. Now, when I work on a feature, I don’t start by thinking about the whole page. I break it down first. What parts are reusable? What is purely presentational? Where should the logic actually live? Does this state belong here — or higher up? That small shift has made a big difference. Instead of large components handling everything, I prefer smaller, focused pieces working together. It makes refactoring easier. It makes debugging clearer. And it reduces unnecessary prop drilling. From the outside, the UI may look the same. But internally, the structure feels intentional and I’ve realized in frontend development structure is what quietly supports everything else. #FrontendDeveloper #ReactJS #JavaScript #WebDevelopment

🚀 Understanding JSX & React DOM in React.js As I continued learning React, I explored two fundamental concepts that power how React works: JSX and React DOM. 🔹 JSX (JavaScript XML) allows us to write UI code that looks like HTML inside JavaScript. It makes component structure more readable and expressive while still being transformed into pure JavaScript behind the scenes. Example: const element = <h1>Hello World</h1>; 🔹 React DOM is responsible for rendering React elements into the actual browser DOM. It acts as the bridge between React’s virtual representation of the UI and the real web page users see. Together: • JSX describes what the UI should look like • React DOM updates and renders it efficiently Understanding these concepts helped me better grasp how React manages UI updates in a structured and optimized way. Continuing to strengthen my frontend fundamentals step by step 🚀 #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #LearningJourney #StudentDeveloper #ReactDOM #JSX

Experimentation is the key to validate what you’ve already learned and pick the right tool for the job. Vanilla JavaScript can be lightning fast, while Vue and React make complex UIs easier to manage. Not sure which works best? Test, measure, and choose — don’t just follow trends blindly. Read more: https://lnkd.in/dtt9amHU #javascript #vuejs #reactjs #webdevelopment #softwareengineering

99% of React beginners make this mistake. I was one of them. 😬 ━━━━━━━━━━━━━━━━ ❌ WRONG const [arr, setArr] = useState([]); arr.push(1); setArr(arr); ✅ RIGHT setArr([...arr, 1]); ━━━━━━━━━━━━━━━━ Why? React doesn't look INSIDE your array. It just checks—is this the same object? You mutated it. Same object. React shrugs. No re-render. 🤷 Always give React something NEW. Spread it. Slice it. Map it. Just don't mutate it. #React #JavaScript #Frontend #LearnToCode #ReactJS

How I Understood useState When I first saw useState, it looked scary. Brackets. Functions. Weird syntax 😅 Then I stopped thinking like a developer and thought like a human. I asked myself: 👉 What is state in real life? State is just memory. A counter remembers a number. An input remembers text. A button remembers whether it’s clicked or not. That’s exactly what useState does. It tells React: 🧠 “Hey, remember this value. And when it changes, update the UI.” That’s it. No magic. So now I think of useState like this: One variable → current value One function → update the value Change the state → React re-renders → UI updates. Big lesson for me 👇 Don’t memorize syntax. Understand the idea behind it. Still learning. Still building. 🚀 #ReactJS #useCallback #FrontendDeveloper #LearningInPublic #Frontend #LearningInPublic #JavaScript #WebDevelopment #DeveloperJourney

DAY 16 OF POSTING REACT CONTENT ⚛️ React didn’t start with Hooks. Earlier, React components were written using classes. They worked, but understanding this, lifecycle methods, and structure took time. In 2018, React introduced Hooks. Hooks allowed developers to write components as simple functions, manage state without classes, and avoid this completely. Classes are still supported. But Hooks became the preferred way because they made React easier to read, write, and maintain. React didn’t remove classes — it just found a simpler way forward. #ReactJS #ReactBasics #JavaScript #FrontendDevelopment #LearnInPublic #WebDevelopment #CodingJourney

Reducers aren’t just a React concept — they’re a practical way to manage real application state. In this short video, I walk through how reducers are implemented in a React JS application, step by step: • Setting up a reducer • Adding and updating a counter • Understanding how the useReducer hook works • Handling add, delete, and update actions • Managing task-based state using dispatch • Writing predictable and maintainable state logic This is how production-ready React applications handle complex state changes without messy code. 🎓 Learn React & Frontend Engineering in depth: 👉 https://lnkd.in/gpc2mqcf 💬 Want a deeper breakdown with real examples? Comment REDUCER and I’ll explain it in detail. #ReactJS #FrontendEngineering #SoftwareEngineering #WebDevelopment #JavaScript #ReactHooks #DeveloperEducation