ReactJS Batching Explained

5 React Best Practices Every Frontend Developer Should Follow in 2026 👇 As React applications grow in complexity, writing clean and maintainable code becomes more critical than ever. Here are 5 practices I consistently apply: 1. Keep components small and focused Each component should do one thing well. If a component handles too much logic, it's a signal to split it. 2. Use custom hooks to share logic Extract reusable stateful logic into custom hooks. It keeps your components clean and your logic testable. 3. Avoid prop drilling — use Context or state managers wisely Passing props through multiple layers creates tight coupling. Lift state up thoughtfully, or reach for Context and Zustand/Redux when appropriate. 4. Memoize only when necessary useMemo and useCallback are tools, not defaults. Profile first, optimize second — premature memoization adds complexity without real gains. 5. Colocate your files Keep styles, tests, and logic close to the component they belong to. It improves discoverability and reduces cognitive overhead. The best React codebases aren't the most clever — they're the most readable. Which of these do you already follow? Drop your thoughts below. 👇 #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #SoftwareEngineering

🚀 Day 7/90 — Becoming a Job-Ready Frontend Engineer Today was not about theory. Today was about building. I created a Smart Counter App using: ✔ JavaScript Closures ✔ DOM Manipulation ✔ Event Listeners ✔ Private State Pattern Instead of using a global variable for the counter, I used a closure to keep the state private. Core idea: A function returns methods (increment, decrement, reset), and the internal count variable remains inaccessible from the outside. This helped me understand: 🔹 How JavaScript preserves variables through closures 🔹 How private state works conceptually 🔹 How event-driven programming updates the UI 🔹 How JavaScript execution connects with real user interaction One key realization: React’s state management concept becomes much easier to understand when you truly grasp closures and function scope. I also extended the project by adding: • A minimum value check • A limit message when the counter reaches max Learning by building hits differently.Create a image for this Linkedin post. Next: Arrays deep dive (map, filter, reduce — essential for React). #FrontendDevelopment #JavaScript #WebDevelopment #Closures #DOMManipulation #SoftwareEngineering #ReactJS #NextJS #100DaysOfCode #ProgrammingJourney #RemoteDeveloper

🚀 Day 16 — React Fundamentals Started ⚛️ Continuing my full stack journey, today I stepped into Step 2: Frontend (React Focused) after building a strong JavaScript foundation 💻🔥 Started with React Core Concepts — not just using React, but understanding how it actually works internally 👇 🔹 Covered topics: - What is React & why it’s used - Single Page Application (SPA) concept - Virtual DOM & how React updates UI efficiently - Component-based architecture - JSX & how it converts into JavaScript internally 💡 Key Learning: React is not just about building UI — it’s about efficient rendering, reusable architecture, and understanding how updates happen behind the scenes. 👉 Always remember: - React is a library, not a framework - Virtual DOM helps update only required parts (performance boost ⚡) - Components make code reusable & scalable - JSX is converted into React.createElement (not directly understood by browser) 📌 Step 2 officially started — diving deeper into frontend engineering ⚛️ 📌 Day by day, getting closer to being job-ready 🚀 #ReactJS #FrontendDevelopment #FullStackDeveloper #MERNStack #InterviewPreparation #LearnInPublic #CodingJourney #Developers #Consistency #100DaysOfCode #WebDevelopment #NextJS #Programming #TechJourney #LinkedIn #Growth #Connections

Day 13 - Frontend Diaries 👉 I thought state updates happen instantly While working with state, my understanding was simple update the state and the new value should be available immediately So I would update state and then try to use that updated value in the next line But things mostly don't behave the way I expected Sometimes the value was still the old one sometimes multiple updates didn’t reflect correctly That’s when I realized state updates are not applied instantly They are scheduled and sometimes batched together React waits and processes them in a way that keeps things efficient Which means you can’t always rely on state being updated right after setting it You have to think in terms of the next render not the current line of code That small shift in understanding explains a lot of unexpected behavior #frontenddevelopment #reactjs #webdevelopment #fullstackdeveloper #softwareengineering #buildinpublic #developers

I made several mistakes as a Frontend Developer… and honestly, I wish someone had told me this earlier. Here are a few that cost me time, growth, and opportunities 👇 1. I focused too much on tools, not fundamentals   I kept jumping from Bootstrap → React → Next.js   But ignored core JavaScript, DOM, and browser concepts. 2. I underestimated clean code   "If it works, it's fine" — big mistake.   Readable, scalable code matters more than quick fixes. 3. I avoided Git deeply   I only used basic commands for a long time.   Understanding branching, rebasing, and workflows changed everything. 4. I didn’t build real-world projects early   Tutorials gave me confidence, but not real skills.   Actual projects exposed my gaps. 5. I ignored performance and accessibility   I used to focus only on UI, not UX quality.   Now I know performance + accessibility = real frontend. 6. I hesitated to share my work   For a long time, I stayed silent.   Posting projects and learnings opened unexpected opportunities. If you're starting your frontend journey, don’t repeat these. Which mistake do you relate to the most? 👇 #frontenddeveloper #webdevelopment #javascript #reactjs #careergrowth

DAY 12 React Renders Are Just Function Calls REACT RENDERS ARE JUST FUNCTION CALLS A React component is just a function. Rendering is just calling that function. Strip away all the magic — a React functional component is literally a JavaScript function that returns JSX. When React "renders" it, it calls the function. The output (JSX) is transformed into React.createElement() calls, producing a plain object description of the UI. Nothing is painted yet at this stage. React is just building a description. The DOM work comes later. Understanding that rendering = function call demystifies hooks, closures, and why the order of hooks must never change. Did this mental model shift how you think about React? #ReactInternals #JSX #JavaScript #WebDevelopment

🚀 Day 8 of Building React Projects Today I built a Movie Search Application using React.js. This project allows users to search for movies and instantly view details such as the poster, rating, and description using a movie API. ✨ Features: • Search movies by name • Display movie posters • Show movie ratings • Show movie descriptions • Responsive and simple UI 🛠 Concepts Used: • API Calls • React Hooks (useState, useEffect) • Search functionality • Fetching and displaying dynamic data 💻 Tech Stack: React.js JavaScript HTML CSS Building small projects daily helps strengthen React concepts and real-world development skills. 🔗 Source code: https://lnkd.in/dz32JTxb #React #JavaScript #WebDevelopment #FrontendDevelopment #CodingJourney #LearningInPublic #ReactProjects

Most React developers think components re-render randomly. They don’t. React actually follows a Depth-First Traversal strategy — and once I understood this, a lot of React’s "weird" behavior suddenly started making sense. 👇 When React updates UI, it doesn't jump around the component tree. It dives deep first — parent → child → child — until it reaches the leaf node. Only then does it backtrack and move to the next sibling. Here’s how React traverses the tree: 🔹 Start from the Root React begins from the root — the top of your component tree. 🔹 Go Deep (Child by Child) It keeps moving downward — first child → next child → until the deepest node. 🔹 Backtrack & Move to Sibling Once React hits a leaf, it goes back to the parent, checks for siblings, and repeats. Now here’s why this matters: ⚡ Fast & Predictable React walks the tree in O(n) — touching each node only once. 🧠 Smart Diffing • If element types change (div → span), React replaces the subtree • For lists, keys help React reuse and reorder nodes efficiently Now the interesting part 👇 This traversal existed even before React Fiber (pre-React 16). But earlier, reconciliation was all-or-nothing. Large component trees could block the main thread and hurt performance. With React 16 (Fiber), traversal became: ⏸️ Interruptible React can pause rendering to handle high-priority updates (like user input) 🔄 Incremental It resumes from where it left off — instead of restarting everything So yes, Depth-First Traversal was always there. React Fiber just made it work with time, not against it. I recently started digging deeper into React internals, and honestly, it’s changing how I structure components and debug performance issues. If you're also exploring React beyond hooks and state — we're probably like-minded. Let’s connect and learn together 🚀 #React #ReactJS #Frontend #WebDevelopment #JavaScript #ReactFiber #SoftwareEngineering #FrontendDevelopment #ReactInternals

Nobody told me this when I started React. For a long time, I just accepted the virtual DOM as magic. Interviewers kept asking about it. I kept giving some vague answer about "React being fast" and "not touching the real DOM directly." They'd nod. I'd move on. Nobody ever pushed back. So I never actually looked into it. Then one day, someone asked me to explain it to a junior developer on my team. And I realised I had nothing real to say. So I finally sat down and figured it out. And honestly — it's not magic at all. It's embarrassingly simple once you see it. The virtual DOM is just a JavaScript object. That's it. It's a plain object that describes what your UI looks like. Every component, every element, every attribute — represented as a nested object in memory. When your state changes, React doesn't immediately go and update the browser. Instead, it builds a new JavaScript object — a new description of what the UI should look like now. Then it compares the old object with the new one. Finds the differences. And only updates those specific parts in the actual browser DOM. That's the whole thing. Compare two objects. Patch what changed. Done. Why does this matter? Because touching the real DOM is slow. The browser has to recalculate layouts, repaint pixels, do a lot of work. React minimises how often that happens by doing the heavy thinking in JavaScript first — which is fast — and then making the smallest possible change to the browser. I went from "it's a React performance thing" to actually understanding the mechanism. Two very different things. If you're going into a React interview and someone asks about the virtual DOM — don't just say it's fast. Explain the compare-and-patch. That's the answer they're actually looking for. #React #JavaScript #Frontend #ReactJS #WebDevelopment #Programming #ReactInterview #100DaysOfCode

Most React developers don’t have a knowledge gap. They have a structure gap. After 5+ years working in frontend (UI/UX → development → leading projects), I’ve seen this again and again: 👉 People know React 👉 But struggle to build real, production-ready apps Because tutorials teach syntax, not how to think The structure that actually matters 👇 1. Foundations → JSX + Virtual DOM → Components, Props, State 2. Hooks (in real priority order) → useState → useEffect → useContext → useMemo → useCallback 3. Real-world patterns → Routing (React Router) → Forms + validation → API calls (loading, error, retry states) 4. Performance → Memoization (React.memo, useMemo) → Avoiding unnecessary re-renders → Code splitting & lazy loading 5. Production readiness → TypeScript with React → Testing (React Testing Library + Jest) → State management (Zustand / Redux Toolkit) 💡 The real gap is here: I know React ❌ I can ship real apps ✅ What actually works 👇 → Pick ONE weak area → Go deep into it → Build something real That’s how you level up. #ReactJS #WebDevelopment #JavaScript #FrontendDeveloper #MERNStack #CareerGrowth