Fineact - Lightweight Reactive Layer for React and Beyond

🔥 React DevTools: Common Issues & How to Use It Effectively React DevTools is one of the most powerful tools for diagnosing performance issues… but many developers don’t use it correctly. Here’s what I’ve learned 👇 ------------------------------------- 🔍 Common Issues Developers Face: 1️⃣ Not Profiling – Many just inspect components without measuring re-renders or performance. 2️⃣ Ignoring Component Trees – Deep trees hide unnecessary renders. 3️⃣ Overlooking State & Props – Changes in parent state can trigger unexpected child re-renders. 4️⃣ Misreading Flame Charts – Not understanding which operations are expensive. 💡 How to Use React DevTools Effectively: ------------------------------------------------- ✅ Profiler Tab – Measure every render and find bottlenecks. ✅ Highlight Updates – See exactly which components re-render. ✅ Inspect Component Props & State – Check if changes are causing unnecessary renders. ✅ Compare Commits – Analyze how updates affect your tree. ✅ Filter and Focus – Only measure the components that matter. 🚀 Pro Tip: “React DevTools doesn’t just show problems… it tells you exactly where to optimize.” 💬 Your Turn: Which feature of React DevTools helped you most in improving performance? #reactjs #reactdeveloper #webdevelopment #frontend #javascript #reactperformance #profiling #devtools #softwareengineering #frontendengineering #performanceoptimization #cleancode #techlead

Level Up Your React Workflow in 2026 💻 The gap between a "good" and "great" developer often comes down to their tooling. After refining my setup this year, these are the extensions that have made the biggest impact on my React productivity: 1. The Logic & Refactoring Powerhouse VSCode React Refactor: Extracting JSX into a new component used to be a manual chore. This extension does it in two clicks. Error Lens: Instead of hovering over red squiggles, it prints the error message inline. Catch those dependency array issues in useEffect instantly. Console Ninja: Stop jumping between your editor and the browser. It displays console.log output and runtime errors directly in your IDE. 2. Visual & Styling Clarity Tailwind CSS IntelliSense: Essential if you’re in the Tailwind ecosystem. Autocomplete and class previews are lifesavers. Peacock: If you work on multiple React projects at once (e.g., a frontend and a backoffice), Peacock colors each window differently so you never push code to the wrong repo. Fluent Icons: Because a clean, recognizable file tree makes navigating large src folders significantly faster. 3. Beyond VS Code While VS Code is the standard, the landscape is shifting: Cursor: My current favorite. As a VS Code fork, it keeps your extensions but adds native AI integration that makes writing boilerplate React hooks feel like magic. WebStorm: For those who want "Everything Included." Its built-in refactoring for React (like renaming components across the entire project) is still the most robust in the game. The right tools don't just make you faster; they reduce the cognitive load so you can focus on solving actual problems. What does your .extensions folder look like? Anything I missed that I should try out? #SoftwareEngineering #ReactJS #JavaScript #Productivity #CodingLife #WebDev

React Rule at Factory: No direct useEffect allowed They banned calling useEffect directly in the codebase. For the rare cases needing external sync on mount, they use a single explicit hook: useMountEffect(). Why? Most useEffect usage was creating: Infinite loops Race conditions Hidden dependency hell Flaky refactors Debugging pain (“why did this run?”) This is even more critical now that AI agents are writing frontend code and often add “just-in-case” effects. The team replaced most effects with these 5 clean patterns: Derive state — don’t sync it with effects Use proper data-fetching libraries — no manual fetch + setState Event handlers — not effect flags useMountEffect — only for true external sync (DOM, third-party widgets) Reset with React keys — instead of effect choreography Result: Fewer bugs, easier reasoning, faster onboarding, and a more predictable codebase. It started as a strict rule born from production pain — now it feels like an essential guardrail. Would you adopt a “no direct useEffect” rule on your team? Thoughts? Too extreme or smart discipline? Drop your take below #React #ReactJS #Frontend #WebDevelopment #JavaScript #CleanCode #SoftwareEngineering

React.memo doesn't prevent re-renders. It just changes why they happen. ⚠️ You think it's optimized. The Profiler says otherwise. 𝗧𝗵𝗲 𝗺𝗼𝘀𝘁 𝗰𝗼𝗺𝗺𝗼𝗻 𝗺𝗶𝘀𝘁𝗮𝗸𝗲: function Parent() { const config = { theme: 'dark' }; // new object → new reference const handleClick = () => console.log('clicked'); // new function → new reference return <Child config={config} onClick={handleClick} />; } const Child = React.memo(({ config, onClick }) => { return <button onClick={onClick}>{config.theme}</button>; }); React.memo does a shallow comparison. config and handleClick are new references on every render — so Child re-renders every time. The memo did nothing. 𝗧𝗵𝗲 𝗳𝗶𝘅 — 𝘀𝘁𝗮𝗯𝗶𝗹𝗶𝘀𝗲 𝘁𝗵𝗲 𝗿𝗲𝗳𝗲𝗿𝗲𝗻𝗰𝗲𝘀: function Parent() { const config = useMemo(() => ({ theme: 'dark' }), []); const handleClick = useCallback(() => console.log('clicked'), []); return <Child config={config} onClick={handleClick} />; } Stable UI requires stable references. 𝗪𝗵𝗲𝗻 𝗥𝗲𝗮𝗰𝘁.𝗺𝗲𝗺𝗼 𝗶𝘀 𝗮𝗰𝘁𝘂𝗮𝗹𝗹𝘆 𝘄𝗼𝗿𝘁𝗵 𝗶𝘁: 1️⃣ 𝗣𝗿𝗼𝗽𝘀 𝗮𝗿𝗲 𝗽𝗿𝗶𝗺𝗶𝘁𝗶𝘃𝗲𝘀 𝗼𝗿 𝘀𝘁𝗮𝗯𝗶𝗹𝗶𝘀𝗲𝗱 𝗿𝗲𝗳𝗲𝗿𝗲𝗻𝗰𝗲𝘀 Objects and functions without memoization = wasted effort. Strings, numbers, booleans compare correctly by default. 2️⃣ 𝗧𝗵𝗲 𝗰𝗼𝗺𝗽𝗼𝗻𝗲𝗻𝘁 𝗶𝘀 𝗴𝗲𝗻𝘂𝗶𝗻𝗲𝗹𝘆 𝗲𝘅𝗽𝗲𝗻𝘀𝗶𝘃𝗲 𝘁𝗼 𝗿𝗲𝗻𝗱𝗲𝗿 If the render is cheap, the comparison is the bottleneck. 3️⃣ 𝗬𝗼𝘂 𝗺𝗲𝗮𝘀𝘂𝗿𝗲𝗱 𝗶𝘁 𝗳𝗶𝗿𝘀𝘁 If you didn't measure it, you didn't optimize it. Open the Profiler. Find the actual bottleneck before reaching for the API. ⚠️ React.memo without stable references is optimisation theatre. It looks like performance work. It isn't. 🎯 𝗧𝗵𝗲 𝗧𝗮𝗸𝗲𝗮𝘄𝗮𝘆 Memoisation is a tool, not a default. Reach for the Profiler before you reach for the API. 💬 Where did React.memo fool you into thinking something was optimized? Drop it below. 👇 #ReactJS #SoftwareEngineering #WebDev #FrontendEngineering #JavaScript

A while back, I noticed something… I was spending way too much time filling the same forms over and over again while testing my projects. Names. Emails. Passwords. Every. Single. Time. At first, I ignored it… but it started slowing me down more than I liked. So I did what most developers do when something gets annoying enough…… I built a solution. That’s how AutoFormX was born. It’s a browser extension that autofills forms instantly, so you can focus on building instead of repetitive typing. 🚀 What it does: • Autofills forms in seconds • Saves reusable test data • Works across different websites • Speeds up development workflow 💡 What I learned: Sometimes the best projects don’t come from big ideas… They come from small frustrations you face every day. 🛠️ Built with: • TypeScript • Next.js • Tailwind CSS • Browser Extension APIs (WXT) 📹 I’ve attached a demo showing how it works. 🔗 Try it here: https://lnkd.in/dNqeGzj4 I’m still improving it, so I’d genuinely love feedback. If you’ve ever built and tested forms… you’ll get why I made this. #buildinpublic #webdevelopment #javascript #productivity #developers #sideproject

𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 𝗶𝘀𝗻’𝘁 𝘁𝗿𝘂𝗹𝘆 𝗰𝗼𝗻𝗰𝘂𝗿𝗿𝗲𝗻𝘁 — but the Event Loop makes it feel like it is. Most developers use async features daily, yet still get confused when things don’t execute in the order they expect. That confusion usually comes from not understanding what’s actually happening under the hood. 𝗛𝗲𝗿𝗲’𝘀 𝘁𝗵𝗲 𝗿𝗲𝗮𝗹𝗶𝘁𝘆 👇 🔹 𝗖𝗮𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 Everything starts here. JavaScript executes one function at a time — no parallel execution, no magic. If the stack is busy, nothing else runs. 🔹 𝗛𝗲𝗮𝗽 (𝗠𝗲𝗺𝗼𝗿𝘆) Objects, closures, and data live here. Mismanaging this is how you end up with memory leaks — especially in long-running apps. 🔹 𝗪𝗲𝗯 𝗔𝗣𝗜𝘀 (𝗕𝗿𝗼𝘄𝘀𝗲𝗿 / 𝗡𝗼𝗱𝗲 𝗿𝘂𝗻𝘁𝗶𝗺𝗲) Async work doesn’t happen in the engine itself. Timers, network calls, DOM events — they’re offloaded to the runtime environment. 🔹 𝗤𝘂𝗲𝘂𝗲𝘀 (This is where most people mess up) There isn’t just one queue. 𝗠𝗶𝗰𝗿𝗼𝘁𝗮𝘀𝗸 𝗤𝘂𝗲𝘂𝗲 → Promises, async/await 𝗠𝗮𝗰𝗿𝗼𝘁𝗮𝘀𝗸 𝗤𝘂𝗲𝘂𝗲 → setTimeout, setInterval, I/O Microtasks always run before macrotasks. This is why Promise.then() executes before setTimeout(fn, 0). 🔹 𝗘𝘃𝗲𝗻𝘁 𝗟𝗼𝗼𝗽 This isn’t doing the work — it’s coordinating it. It continuously checks: Is the Call Stack empty? If yes → run all microtasks Then → pick one macrotask Repeat That’s the entire scheduling model. 💡 𝗪𝗵𝗮𝘁 𝗮𝗰𝘁𝘂𝗮𝗹𝗹𝘆 𝗺𝗮𝘁𝘁𝗲𝗿𝘀 𝗶𝗻 𝗿𝗲𝗮𝗹 𝗽𝗿𝗼𝗷𝗲𝗰𝘁𝘀   • Async bugs are rarely random — they’re scheduling issues   • Misunderstanding microtasks vs macrotasks leads to race conditions   • “Why did this run first?” → Event Loop is the answer every time   • Performance bottlenecks often come from blocking the Call Stack JavaScript is single-threaded. The Event Loop doesn’t make it parallel — it makes it predictable if you understand it properly. #JavaScript #EventLoop #AsyncJavaScript #WebDevelopment #Frontend #NodeJS #SoftwareEngineering

🚀 Frontend Performance — Learning in Public Over the last couple of days, I explored Lighthouse-based performance analysis on a real application. Key learnings 👇 🧠 Main Thread Matters 👉 Browser runs on a single thread 👉 Heavy JS → slower interaction 🚦 Render-Blocking Resources 👉 CSS/JS can delay UI rendering ⛓️ Critical Request Chain 👉 Too many dependencies → slower loading 📊 Lighthouse Insight 👉 It’s not about score 👉 It’s about identifying root causes 🎯 Big takeaway: Performance = reduce work + remove blockers 📌 Next: Building a real-world performance audit report #Frontend #WebPerformance #JavaScript #ReactJS #SoftwareEngineering #LearnInPublic

⚡ Day 4 of 30: Mastering useState – The Heartbeat of Interactive React Yesterday I learned how to pass data down. Today I learned how to make components remember and respond. Enter useState — the hook that gives functional components memory. 🧠 What I Internalized Today: 1️⃣ Props vs. State Props are read‑only configuration from parents. State is internal, mutable data the component owns. This distinction is fundamental to React's predictable data flow. 2️⃣ State Triggers Re‑renders Calling setState schedules a re‑render. React diffs the Virtual DOM and surgically updates only what changed. Efficient and elegant. 3️⃣ Immutability is Non‑Negotiable Direct mutation (array.push(), obj.name = 'x') will not trigger a re‑render. Always create a new reference using the spread operator (...) or methods like .map() / .filter(). 4️⃣ Multiple States > One Giant Object Following the Single Responsibility Principle: separate useState calls for independent values make code cleaner and re‑renders more predictable. 5️⃣ Functional Updates for Stale Closures When new state depends on previous state, use the callback form: setCount(prev => prev + 1). This ensures you're always working with the latest snapshot. 🛠️ Today's Builds (All Interactive): ✅ Counter App – Increment, decrement, reset. The classic. ✅ Color Toggler – Conditional styling based on boolean state (Light/Dark mode). ✅ Controlled Form – Inputs fully synchronized with React state. ✅ Cart Item Quantity Changer – Updating nested object state with the spread operator. ✅ Todo List (Mini Build) – Full CRUD operations on an array state (add, toggle complete, delete, remaining count). 📁 GitHub Streak: Day 4 ✅ Every day's code is committed, documented, and pushed. This repository is becoming a living portfolio of deliberate React practice. Next Up: Day 5 – Events & Handlers. Deepening interactivity! #ReactJS #useState #WebDevelopment #Frontend #JavaScript #30DaysOfReact #LearningInPublic #ReactHooks #CodeNewbie #StateManagement

📈 Growth as a developer isn’t about learning new frameworks every day… It’s about improving how you build things. Today I worked on: 🔹 Dynamic sidebar menus 🔹 Permission-based UI rendering 🔹 Clean modular structure in Laravel But more importantly, I focused on: 💡 Writing scalable code 💡 Avoiding duplication 💡 Keeping UI & logic in sync Because real-world projects don’t fail due to lack of features… They fail due to poor structure. Every small improvement I make today is building a stronger foundation for tomorrow. #GrowthMindset #LaravelDeveloper #SoftwareEngineering #CleanArchitecture #WebDev #CodingJourney #DevelopersLife #TechGrowth