React Simplifies Components with No Boilerplate

Day 82 / 365 👨💻 Started understanding React state. 🧠 Problem that useState solves ⚙️ How useState works step by step 🔄 Why re-rendering happens ⏳ Why state updates aren’t immediate 🔁 Updater function vs direct value #365DaysOfCode #React #JavaScript #Frontend

React developers have been manually optimizing performance for years. Using: • React.memo() • useMemo() • useCallback() But React 19 introduces something powerful — the React Compiler. It can automatically optimize your components. Swipe through to learn #react #reactjs #javascript #typescript #hooks #useMemo #useCallback #optimization #webdevelopment #frontend #compiler #reactcompiler #react19

Day 81 / 365 👨💻 Recap of recent React tooling sessions. ⚙️ How @vitejs/plugin-react works ⚡ Role of esbuild and Babel (Fast Refresh) 📦 Rollup for production builds 🔢 Version symbols in package.json 📤 Named vs default exports #365DaysOfCode #React #JavaScript #Frontend

JavaScript has exactly 6 falsy values. Memorize them: 1. false 2. 0 3. "" (empty string) 4. null 5. undefined 6. NaN Everything else is truthy. even these: [] ✓ truthy {} ✓ truthy "0" ✓ truthy "false" ✓ truthy -1 ✓ truthy Understanding this helps avoid many logical bugs. #react #frontend #javascript

🚀 Day 4 – Truthy & Falsy Values in JavaScript Not everything in JavaScript is strictly true or false… and that’s where many subtle bugs begin. Understanding truthy and falsy values helps you write cleaner, more predictable code—especially when working with conditions in real-world apps (hello Angular devs 👋). 🔍 Key Takeaways: ✔ JavaScript has only a few falsy values: false, 0, "", null, undefined, NaN ✔ Everything else is truthy ✔ Cleaner conditions = better readability ✔ But be careful! 0 and "" can trick you #JavaScript #Angular #WebDevelopment #Frontend #CodingTips #LearnToCode

⚡ Lazy Loading in React — a quick visual breakdown → Before: 3.7 MB loaded on page open   → After: 405 KB loaded on page open   → Result: 4.3× faster First Contentful Paint 🚀  All of this with just 2 lines of code using React.lazy() + Suspense. This is a small but often underestimated concept that can significantly improve performance. Swipe to see the network panel & Lighthouse scores 👉  #ReactJS #WebPerformance #Frontend #JavaScript #React

💡 𝗧𝗶𝗽 𝗼𝗳 𝘁𝗵𝗲 𝗗𝗮𝘆 — 𝗥𝗲𝗮𝗰𝘁 𝗗𝗶𝗱 𝘆𝗼𝘂 𝗸𝗻𝗼𝘄? In React, "useEffect" 𝗰𝗹𝗲𝗮𝗻𝘂𝗽 𝗳𝘂𝗻𝗰𝘁𝗶𝗼𝗻𝘀 𝗿𝘂𝗻 𝗯𝗲𝗳𝗼𝗿𝗲 𝘁𝗵𝗲 𝗻𝗲𝘅𝘁 𝗲𝗳𝗳𝗲𝗰𝘁 𝗮𝗻𝗱 𝗼𝗻 𝘂𝗻𝗺𝗼𝘂𝗻𝘁. This means React will 𝗰𝗹𝗲𝗮𝗻 𝘂𝗽 𝘁𝗵𝗲 𝗽𝗿𝗲𝘃𝗶𝗼𝘂𝘀 𝗲𝗳𝗳𝗲𝗰𝘁 before running a new one when dependencies change. 🔧 𝗪𝗵𝘆 𝘁𝗵𝗶𝘀 𝗺𝗮𝘁𝘁𝗲𝗿𝘀: - Prevents memory leaks - Avoids duplicate subscriptions or event listeners - Keeps your components predictable 𝗥𝘂𝗹𝗲 𝗼𝗳 𝘁𝗵𝘂𝗺𝗯: If your effect sets something up, your cleanup should tear it down. #React #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #SoftwareEngineering #CodingTips #BestPractices #FullstackDeveloper

I just deleted 30 lines of code from a React component. no refactor. no library. just one hook in React 19. it's called use() — and it changes how you handle async data and context in your components. most devs haven't heard of it yet. swipe through ↓ broke it down simply what's the most boilerplate you've deleted in a single React upgrade? 👇 #react #react19 #javascript #webdev #frontend