React vs Next vs Vue: Choosing the Right Tool for #100DaysOfCode

🚀 Day 12 of My React JS Journey – Understanding State Deeply ⚛️ Today I strengthened my understanding of the core concept in React — State. 🔹 What is State? State represents the data in a React application that can change over time. Whenever the state changes, React automatically re-renders the component, updating the UI. 💡 Key Learnings: ✔ State is mutable (updated using setter function) ✔ State is local to a component ✔ State is reactive (UI updates automatically on change) 🔹 Creating & Managing State: Step 1: JavaScript import { useState } from "react"; Step 2: JavaScript const [value, setValue] = useState(initialValue); • value → holds current state • setValue → updates the state ⚠️ Important Insight: State updates are asynchronous ⏳ JavaScript setValue(5); console.log(value); // still old value This helped me understand how React processes updates internally. ⚛️ Behind the Scenes: React uses Virtual DOM ✔ Creates a virtual copy of UI ✔ Compares changes efficiently ✔ Updates only required parts 👉 This makes React fast and efficient 🚀 💭 Today’s Takeaway: State is the backbone of dynamic UI in React. Mastering state means mastering how React works. Learning step by step and building strong fundamentals every day 📈🔥 #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #ReactState #VirtualDOM #LearningJourney #DeveloperGrowth

I thought moving from React to Next.js would feel like a simple upgrade. It didn’t. It felt like moving from building interfaces… to understanding how real production applications are structured. With React, I became comfortable thinking in components: state, props, reusable UI, event handling, and building smooth user interactions. But Next.js introduced a different level of discipline. Suddenly, small decisions started carrying more weight: - Should this stay server-side or client-side? - Does this belong in a layout or a page? - When should data be fetched? - How should routing scale when the project grows? At first, some of these ideas looked simple until they had to work inside a real project. That was where the real learning happened. The biggest difference for me was realizing that Next.js doesn’t just help you write code faster — it pushes you to think more like an engineer building for production. Features like: - file-based routing - nested layouts - server components - API routes - image optimization - improved performance by default …all started making sense once I stopped treating them as “features” and started seeing them as architecture decisions. What surprised me most: the upgrade changed how I plan before coding. Now I think more about scalability, maintainability, and performance before writing the first component. React taught me how to build. Next.js is teaching me how to build with long-term structure. Still learning. Still improving. But every project now feels more intentional. For developers who have made this transition: What was the first Next.js concept that forced you to rethink how you build? 👇 #WebDevelopment #NextJS #ReactJS #FrontendDeveloper #JavaScript #TypeScript #SoftwareEngineering #BuildInPublic #FullStackDevelopment #TechJourney

React Developer Roadmap (2026) – From Beginner to Pro If you're planning to become a professional React developer, here’s a clear roadmap to guide your journey step by step 🔹 1. Fundamentals First Start with HTML, CSS, and modern JavaScript (ES6+). Focus on concepts like closures, promises, async/await, and array methods. 🔹 2. Core React Concepts Learn JSX, components, props, state, event handling, and conditional rendering. Understand how React works behind the scenes. 🔹 3. Advanced React Dive into hooks (useState, useEffect, useContext), custom hooks, performance optimization, and component reusability. 🔹 4. State Management Learn tools like Redux Toolkit, Zustand, or Context API for managing complex state in scalable applications. 🔹 5. Routing & APIs Use React Router for navigation and integrate APIs using fetch/axios. Learn error handling and loading states. 🔹 6. Next.js & Full-Stack Skills Move to Next.js for SSR, SSG, and better performance. Explore backend basics (Node.js, Express, MongoDB). 🔹 7. UI & Styling Master Tailwind CSS, Material UI, or ShadCN UI for building modern, responsive designs. 🔹 8. Testing & Optimization Learn testing (Jest, React Testing Library) and optimize apps for performance and SEO. 🔹 9. Real Projects & Deployment Build real-world projects, deploy on Vercel/Netlify, and create a strong portfolio. 🔹 10. Interview Preparation Practice coding problems, JavaScript concepts, React scenarios, and system design basics. Let’s Connect & Collaborate! 📂 Portfolio: https://lnkd.in/djV-Nq8b #ReactJS #WebDevelopment #SoftwareEngineering #CareerAdvice #JavaScript #FrontendDevelopment #NextJS #FullStackDeveloper #DeveloperRoadmap #LearnToCode #CodeNewbie #InterviewPrep #LearnToCode #InterviewPrep #SoftwareArchitecture #TechCommunity #FullStackDeveloper #CodeNewbie #TailwindCSS

Day 21: useMemo vs useCallback (Most Confusing React Topic) Many React developers get confused between useMemo and useCallback. But the difference is actually simple 📌 What is useMemo? useMemo is used to memoize a computed value. 👉 It prevents expensive calculations from running again and again. import { useMemo, useState } from "react"; function App() { const [count, setCount] = useState(0); const expensiveValue = useMemo(() => { console.log("Calculating..."); return count * 10; }, [count]); return ( <div> <h1>{expensiveValue}</h1> <button onClick={() => setCount(count + 1)}>Increase</button> </div> ); } ✅ It stores the result/value. 📌 What is useCallback? useCallback is used to memoize a function. 👉 It prevents a function from being recreated on every render. import { useCallback, useState } from "react"; function App() { const [count, setCount] = useState(0); const handleClick = useCallback(() => { console.log("Clicked"); }, []); return ( <div> <button onClick={handleClick}>Click</button> <h1>{count}</h1> <button onClick={() => setCount(count + 1)}>Increase</button> </div> ); } ✅ It stores the function reference. 🔥 Simple Difference ✅ useMemo → returns a VALUE ✅ useCallback → returns a FUNCTION 📌 When to use them? useMemo ✔ Heavy calculations ✔ Derived data useCallback ✔ Passing functions as props ✔ React.memo optimized components 🎯 Interview Line 👉 useMemo memoizes values, useCallback memoizes functions. #ReactJS #useMemo #useCallback #FrontendDevelopment #JavaScript #WebDevelopment #CodingJourney #LearnInPublic

Most people think React is just a JavaScript library. But that’s not why React became the most popular frontend technology in the world. React changed how developers think about building interfaces. Before React: UI development looked like this 👇 • Manual DOM updates • Complex UI logic • Hard-to-maintain code • Slow development cycles Then React introduced something powerful: Component-based architecture. Now developers can build apps like LEGO blocks. Small reusable pieces: 🔹 Navbar 🔹 Buttons 🔹 Cards 🔹 Forms 🔹 Dashboards Each component manages its own logic and state. This leads to: ⚡ Faster development ⚡ Cleaner code ⚡ Reusable UI ⚡ Better scalability But the real magic of React is the Virtual DOM. Instead of updating the whole page, React updates only the parts that change. Result? 🚀 Faster applications 🚀 Better user experience 🚀 High performance UI That’s why companies like Meta, Netflix, Airbnb, and Uber rely heavily on React. And with tools like: • Next.js • Redux Toolkit • Tailwind CSS • React Query React has become a complete ecosystem for modern web apps. The question is no longer: "Should you learn React?" The real question is: How well can you master it? What’s your favorite thing about React? 👇 #React #WebDevelopment #JavaScript #Frontend #FullStack #Programming #Tech

React Developer Roadmap (2026) – From Beginner to Pro If you're planning to become a professional React developer, here’s a clear roadmap to guide your journey step by step 🔹 1. Fundamentals First Start with HTML, CSS, and modern JavaScript (ES6+). Focus on concepts like closures, promises, async/await, and array methods. 🔹 2. Core React Concepts Learn JSX, components, props, state, event handling, and conditional rendering. Understand how React works behind the scenes. 🔹 3. Advanced React Dive into hooks (useState, useEffect, useContext), custom hooks, performance optimization, and component reusability. 🔹 4. State Management Learn tools like Redux Toolkit, Zustand, or Context API for managing complex state in scalable applications. 🔹 5. Routing & APIs Use React Router for navigation and integrate APIs using fetch/axios. Learn error handling and loading states. 🔹 6. Next.js & Full-Stack Skills Move to Next.js for SSR, SSG, and better performance. Explore backend basics (Node.js, Express, MongoDB). 🔹 7. UI & Styling Master Tailwind CSS, Material UI, or ShadCN UI for building modern, responsive designs. 🔹 8. Testing & Optimization Learn testing (Jest, React Testing Library) and optimize apps for performance and SEO. 🔹 9. Real Projects & Deployment Build real-world projects, deploy on Vercel/Netlify, and create a strong portfolio. 🔹 10. Interview Preparation Practice coding problems, JavaScript concepts, React scenarios, and system design basics. 💡 Consistency + Real Projects = Success #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #NextJS #SoftwareEngineering #Coding #Programming #DeveloperRoadmap #TechCareer #LearningJourney

🚀 10 Powerful Ways to Optimize React Applications (Every Frontend Developer Should Know) React apps can become slow when components re-render unnecessarily or when the bundle size grows. Here are some proven techniques to optimize React performance 👇 1️⃣ Memoization with React.memo Prevents unnecessary re-renders of functional components when props do not change. const MyComponent = React.memo(({ value }) => { return <div>{value}</div>; }); 2️⃣ useMemo Hook Memoizes expensive calculations so they are not recomputed on every render. const sortedList = useMemo(() => { return items.sort(); }, [items]); 3️⃣ useCallback Hook Memoizes functions to prevent unnecessary re-renders in child components. const handleClick = useCallback(() => { setCount(count + 1); }, [count]); 4️⃣ Code Splitting with Lazy Loading Load components only when needed to reduce bundle size. const Dashboard = React.lazy(() => import("./Dashboard")); 5️⃣ Virtualization for Large Lists Use libraries like react-window or react-virtualized to render only visible list items. 6️⃣ Avoid Unnecessary State Keep state minimal and derive values when possible. ❌ Bad const [fullName, setFullName] = useState("") ✅ Good const fullName = firstName + lastName 7️⃣ Key Prop in Lists Always use unique keys to help React efficiently update the DOM. items.map(item => <Item key={item.id} />) 8️⃣ Debouncing and Throttling Improve performance for search inputs and scroll events. Example: lodash debounce 9️⃣ Optimize Images Use compressed images and lazy loading. <img loading="lazy" src="image.png" /> 🔟 Production Build Always deploy optimized production build. #ReactJS #FrontendDevelopment #JavaScript #WebPerformance #Coding #100DaysOfCode #SoftwareEngineering #interview #javascript #post #developer #AI #optimization

What Runs First in React? Most React developers know what useEffect, useMemo, and useCallback do individually. Far fewer know the exact order they execute in. And that gap causes bugs that are surprisingly difficult to trace. Here is the definitive execution order on first mount: -> Step 1: Rendering JSX React runs the function body of your component first. JSX is evaluated. console.log inside the return runs here. This is the render phase. -> Step 2: useMemo runs during render useMemo executes synchronously during the render phase, not after it. If you have an expensive computation wrapped in useMemo, it runs as part of building the component output. This is why useMemo can be used to compute values that are needed in the JSX itself. -> Step 3: useEffect runs after render After the component has rendered and the DOM has been updated, useEffect fires. It is intentionally deferred. This is where API calls, subscriptions, and side effects belong because they should not block the render. -> useCallback is different from all of them useCallback does not run during mounting. It stores a function reference. That function only executes when it is explicitly called. In the example on the right, increment only logs when you actually call increment(). The final order: Rendering JSX, then useMemo, then useEffect. Why this matters in practice: If you expect useEffect to run before useMemo, your state update will not be available when useMemo computes. If you expect useCallback to run automatically, your side effect will never fire. Getting the order wrong means working with stale data and writing code that behaves differently than you intended. Understanding execution order is not academic. It is the difference between components that behave predictably and ones that produce subtle timing bugs you spend hours debugging. Did you know the exact execution order before seeing this or did it surprise you? #React #ReactHooks #FrontendDevelopment #JavaScript #WebDevelopment #Developers

🚀 Excited to announce the launch of `react-aspirin`! 💊 After dealing with the same recurring React challenges across multiple projects, I decided to build a solution. Today, I'm open-sourcing react-aspirin—a high-performance, completely tree-shakable React utility library designed to literally "cure" common developer headaches. If you've ever struggled with complex state syncing, diagnosing re-renders, or handling web workers natively in React, this library was built exactly for you. ✨ A few of the 42 lightweight hooks & components included: 🔍 `useTrace`: pinpoint exactly *why* your components are re-rendering. 👻 `useGhost` : zero-config, highly-performant form state management. 🚧 `<Guard />`: a declarative Error Boundary with built-in crash reporting. ⚙️ `useWorker`: seamlessly offload heavy calculations to Web Workers directly in JSX. 🎬 `useTransitionState` & `useAutoAnimate`: fluid, zero-config animations. 📡 `usePoll` & `useOnlineEffect`: smart, visibility-aware network polling. …etc Everything is strictly typed with TypeScript, has zero external dependencies, and is incredibly lightweight. 📚 Interactive Documentation: I've built a full documentation website with 100% live, interactive code previews for every single hook: 🔗 https://lnkd.in/gx4iy4th 💻 Try it out: npm i react-aspirin I'd love for the React community to try it out, break it, and let me know your thoughts! Contributions and feedback are incredibly welcome! 👇 🔗 GitHub: https://lnkd.in/gggVaeDB #ReactJS #WebDevelopment #Frontend #TypeScript #JavaScript #OpenSource #ReactHooks #WebPerf #NodeJS

Why I’m choosing "Boring" Tech over the latest JS Frameworks: I know, I know. We’re supposed to love the 15th new React framework released this month. We’re told that if we aren’t using Server Actions, Edge Computing, and 4 layers of abstraction, we’re "falling behind." But for my latest web build, I went back to the basics (Vite + React SPA), and here is why: The "Localhost" Speed (DX): Configuring complex SSR (Server-Side Rendering) rules feels like fighting the framework. With a clean Vite setup, the dev server is up in milliseconds. No "Hydration Errors," no mysterious server-only crashes. Just pure, fast coding. Deployment Shouldn't be a Puzzle: I don't want to be locked into a specific hosting provider just to get "optimal performance." A client-side app is just a folder of static files. I can host it on a CDN for pennies, and it scales to millions of users without me touching a single server config. State Management without the Headache: In the SSR world, sharing state between the server and the client is a constant battle. In a dedicated SPA, the "Source of Truth" is clear. It’s predictable, it’s testable, and it’s fast. 𝐓𝐡𝐞 𝐕𝐞𝐫𝐝𝐢𝐜𝐭? The modern web stack is becoming an Over-Engineered Monster. We’re solving problems that 90% of apps don't even have. Sometimes, a simple, fast car is better than a space shuttle when you're just trying to drive across town. Is the "Full-Stack Framework" hype-train slowing down? Or am I just getting old? Let’s settle this: SSR or SPA? Comment below! #WebDev #ReactJS #Vite #SoftwareEngineering #Frontend #CodingLife #WebArchitecture #BuildInPublic #WebDevelopment #React #JS #Post