React Updates Screen Without Page Reload

DAY 10 OF POSTING REACT CONTENT ⚛️ WHERE DOES REACT KEEP TRACK OF CHANGING VALUES? 🤔 React updates only what changes. But for that, it needs to know what changed. So React stores changing values in a special place. That place is called state. State is just: 👉 a value React keeps 👉 while the page is running 👉 and watches for changes When state changes, React updates the needed part of the screen. That’s it. No magic. No extra meaning. 💬 Does this make the idea of “state” feel simpler now? #ReactJS #ReactBasics #FrontendDevelopment #JavaScript #LearnInPublic #WebDevelopment #CodingJourney

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

DAY 9 OF POSTING REACT CONTENT ⚛️ REACT DOES NOT UPDATE THE WHOLE SCREEN — IT UPDATES ONLY WHAT CHANGES 🤯 Earlier websites worked like this: one small change → many parts of the screen get affected. React changed that thinking. When something changes, React updates only that specific part of the UI — not the entire screen. So: 👉 less unnecessary work 👉 smoother user experience 👉 better performance You don’t tell React how to update everything. You just change the value — React handles the rest. 💬 Did you expect React to update only one part instead of the whole screen? #ReactJS #ReactBasics #FrontendDevelopment #JavaScript #LearnInPublic #WebDevelopment #CodingJourney

DAY 13 OF POSTING REACT CONTENT ⚛️ WHY REACT PREFERS ARROW FUNCTIONS ⚛️ 👉 Function behavior should not change based on who calls it. With normal functions: behavior can change context can change confusion increases Arrow functions say: “I don’t care who calls me” “I stay tied to where I was created” “My behavior stays the same” That’s why React prefers arrow functions: predictable behavior fewer bugs simpler mental model This is not about syntax. This is about reliability. #ReactJS #JavaScript #ReactBasics #FrontendDevelopment #LearnInPublic #WebDevelopment #CodingJourney

Day 29 of Posting React Content 📌 What Is useRef? 🧠 Imagine This You’re studying. You keep a small sticky note beside you. On that note, you write: “Revise React at 7 PM.” That note: 📝 Stores information 📝 Stays there 📝 Doesn’t disturb your study 📝 Doesn’t restart your work It just sits quietly. 💡 In React Sometimes you need something that: 📌 Stores a value 📌 Stays between renders 📌 Does NOT cause the screen to update That’s what useRef does. It’s like a sticky note inside your component. You can: ✨ Store a value ✨ Access a DOM element ✨ Focus an input ✨ Track previous values And React will NOT re-render because of it. One Clear Difference useState → changes UI when updated useRef → stores value silently #ReactJS #ReactHooks #useRef #FrontendDevelopment #JavaScript #ReactInterview #LearnInPublic #CodingJourney

𝐃𝐚𝐲 #5 — 𝐇𝐨𝐰 𝐑𝐞𝐚𝐜𝐭 𝐇𝐚𝐧𝐝𝐥𝐞𝐬 <input> Many developers think React or JavaScript fully controls the <input> element but that’s not completely true. By default, the browser manages the input UI, updating it on every keystroke. This is known as an uncontrolled component. React can take control by storing the value using state or refs, turning it into a controlled component. 📌 Simple idea: Browser controls input by default. React controls it when needed. A small concept, but powerful for understanding: ✓ Forms ✓ Controlled vs Uncontrolled Components ✓ DOM vs Virtual DOM Learning React one concept at a time. #ReactJS #JavaScript #WebDevelopment #LearningInPublic #Frontend #ReactConcepts

Day 27 of Posting React Content 🔄 What Is useState? 🧠 Imagine This You’re using Instagram ❤️ You tap the like button. 🤍 → ❤️ The heart turns red. The number increases. The page doesn’t reload. But something changed. That “changing value” is called state. 💡 So What Is useState? useState is a Hook introduced in 2018 (React 16.8). It allows function components to: ✨ Store data ✨ Update data ✨ Re-render the UI when data changes All without using classes. #ReactJS #ReactHooks #useState #FrontendDevelopment #JavaScript #ReactInterview #LearnInPublic #CodingJourney

🔥 Hidden React Fact #3 React re-renders more than you think… and it’s NOT always bad 👀 Most devs panic when they hear “extra re-renders”. But here’s the truth 👇 👉 Re-render ≠ DOM update What actually happens: React re-runs your component function Creates a new Virtual DOM Uses the diffing algorithm Updates the real DOM only if needed 💡 Key insight React prefers cheap re-renders over complex manual optimizations. The real performance killers ❌ • Heavy calculations inside render • Unnecessary object/array recreation • Incorrect useEffect dependencies The smart approach ✅ Optimize what happens during render, not the render itself. Stop fighting re-renders. Start understanding them. This mindset shift alone can level up your React skills #HiddenReactFacts #ReactJS #FrontendDevelopment #JavaScript #ReactPerformance #WebDevelopment #NextJS #TypeScript #FrontendEngineering #DevCommunity

Want to reuse your code instead of rewriting it? 👨💻⚡ Discover simple, practical ways to share React Web and React Native code efficiently save time, reduce bugs, and ship faster. Read the full blog here: 🔗 https://lnkd.in/dTbmWysx #ReactJS #ReactNative #WebDevelopment #AppDevelopment #CodeSharing #JavaScript #FrontendDevelopment #MobileDevelopment #TechBlog #DevelopersLife #CrossPlatform #SoftwareEngineering

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