React Series – Day 1 🚀 So… what exactly is React? React is a JavaScript library for building user interfaces. But practically? It helps you build complex UIs using small, reusable components. Instead of manipulating the DOM manually, React updates only what actually changes. That’s why it’s fast. Key ideas behind React: * Component-based architecture * Virtual DOM * Reusable UI pieces * One-way data flow Think of React like LEGO blocks. Small components → combined → complete application. Up Next: JSX — the syntax that makes React powerful. #ReactJS #FrontendDeveloper #WebDevelopment #ReactSeries

🚀 Project Spotlight: Building a Scalable File Management UI with React Recently, I worked on implementing a **dynamic file type management interface** using React. The goal was to create a clean and efficient UI where users can manage file types and mappings easily. 🔧 Tech Stack • React.js • JavaScript (ES6+) • Redux for state management • Reactstrap & React Select for UI components ✨ Key Features Implemented ✔ Dynamic data table with row selection ✔ Conditional UI rendering based on user actions ✔ Responsive UI for different screen sizes ✔ Reusable components for scalability 📚 Useful resources that helped during development: React Documentation https://react.dev/learn Redux Documentation https://lnkd.in/gPJmkbfu JavaScript Guide (MDN) https://lnkd.in/ge3KVDws 💡 What I learned from this project: • Importance of clean state management • Writing reusable and scalable UI components • Handling complex UI interactions efficiently Always exciting to keep improving as a developer and building better user experiences. #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #SoftwareEngineering #ReactDeveloper

Shipped my latest front-end project — an Async Weather Tracker built with vanilla JS. ☁️ Key features: - Live weather data via OpenWeatherMap API - async/await for all API calls - Search history stored in localStorage - Clean, minimal UI redesign Check it out here 👇 https://lnkd.in/g_kQZ6ad Still learning, still building. #JavaScript #FrontEnd #WebDevelopment #StudentProject

You call setState. You immediately log the value. It prints the old state. React is broken? No. Most developers misunderstand how React state updates actually work. React state isn’t truly asynchronous. It’s batched. It’s scheduled. And it re-renders after your function finishes. That’s why it feels async. I broke it down visually — step by step 👇 (With diagrams + interview explanation) https://lnkd.in/eHbnJ63p React Confusion Series — Part 1 #react #javascript #frontend #webdevelopment

🚀 Day 5/30 – State in React One of the most important concepts 🔥 Today I learned: ✅ State stores dynamic data inside a component → It allows components to manage and update their own data ✅ When state changes → React re-renders the UI → React automatically updates only the changed parts (efficient rendering ⚡) ✅ Managed using useState hook → The most commonly used hook in functional components ✅ State updates are asynchronous → React batches updates for better performance 💻 Example: import { useState } from "react"; function Counter() { const [count, setCount] = useState(0); const handleClick = () => { setCount(prev => prev + 1); // safe update }; return ( <div> <h2>Count: {count}</h2> <button onClick={handleClick}>Increment</button> </div> ); } 🔥 Key Takeaway: State is what makes React components interactive, dynamic, and responsive to user actions. #React #State #FrontendDevelopment #JavaScript #WebDev #CodingJourney #LearnInPublic

React Hooks provide a way for functional components to use state and lifecycle features without needing class components. Hooks like useState allow components to store and update state, while useEffect handles side effects such as data fetching, subscriptions, or updating the DOM after rendering. Instead of splitting logic across lifecycle methods like componentDidMount or componentDidUpdate, hooks let developers organize related logic together in a simpler and more readable way. This approach reduces complexity and makes React components easier to maintain and test. Another key advantage of React Hooks is that they promote reusable logic through custom hooks. Developers can extract common behaviors—such as API calls, form handling, or authentication logic—into reusable hooks and share them across multiple components. Hooks also work seamlessly with React’s component-based architecture, allowing developers to build dynamic and responsive interfaces while keeping the code clean and modular. By simplifying state management and component behavior, React Hooks have become an essential part of modern React development. #ReactHooks #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #FullStackDeveloper #SoftwareEngineering

🚀 React Performance Tip: Stop Unnecessary Re-renders with useMemo While building React applications, unnecessary recalculations can slow down your UI. That's where useMemo helps. It memoizes expensive calculations and only recomputes them when dependencies change. Example 👇 const expensiveValue = useMemo(() => { return heavyCalculation(data); }, [data]); ✅ Benefits: • Improves performance in large applications • Prevents unnecessary calculations • Helps optimize complex UI components ⚠️ But remember: Don’t overuse useMemo. Use it only when computations are expensive. 💡 Pro Tip: Use React DevTools Profiler to identify slow components before optimizing. What’s your favorite React performance optimization technique? #reactjs #frontenddevelopment #webdevelopment #javascript #reactperformance #softwareengineering #100DaysOfCode

⚛️ Improving React Performance with Lazy Loading As React applications grow, the bundle size can increase significantly. Loading all components at once can slow down the initial page load and impact the user experience. React Lazy Loading helps solve this problem by loading components only when they are needed, instead of including everything in the main JavaScript bundle. With tools like "React.lazy()" and "Suspense", React can split the code and dynamically load components when a user navigates to them. Benefits of React Lazy Loading: • Smaller initial bundle size • Faster page load • Better performance on slower networks • Improved overall user experience Optimizing how and when components load is a key step in building scalable and high-performance React applications. Reference from 👉 Sheryians Coding School #React #WebDevelopment #Frontend #JavaScript #Performance #SoftwareEngineering

Ever built a Search Bar and noticed it always feels one step behind? ``` const [query, setQuery] = useState(""); const handleSearch = (e) => { setQuery(e.target.value); fetchResults(query); } ``` Your user types "React Hooks", but you're fetching results for "React Hook". Always one keystroke behind. This catches almost every React developer off guard at some point. I've had my fair share too when I was new to React. Here's what's actually happening under the hood: 1. User types -> setQuery is called -> React queues a re-render 2. The current function finishes executing (with the old value still in scope) 3. React re-renders the component 4. Only now does the useState return the new value of the state State updates in React are asynchronous. The setter doesn't mutate the variable in place - it schedules a new render where the updated value will be available. The fix is simpler than you'd think: ``` const handleSearch = (e) => { const newQuery = e.target.value; setQuery(newQuery); fetchResults(newQuery); } ``` Store the new value in a local variable first. Use that everywhere in the same function call. React's model makes much more sense once you stop thinking of state as a variable and start thinking of it as a snapshot per render. #ReactJS #React #Frontend #FrontendEngineering #WebDevelopment

𝗪𝗵𝘆 𝗠𝗮𝗻𝘆 𝗥𝗲𝗮𝗰𝘁 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿𝘀 𝗠𝗶𝘀𝘂𝘀𝗲 𝘂𝘀𝗲𝗠𝗲𝗺𝗼 I often see useMemo added everywhere in React codebases. Something like this: const filteredUsers = useMemo(() => { return users.filter(user => user.active); }, [users]); This code is technically correct. But here’s the important part: Not every computation needs memoization. useMemo itself has a cost. React still needs to: • Store the memoized value • Track dependencies • Compare dependency changes If the computation is cheap, memoization may add more overhead than benefit. For example, operations like filter() or map() on small datasets are already very fast. Memoization becomes useful when the computation is expensive or when stable references help prevent unnecessary re-renders. A simple rule I try to follow: Use useMemo when: • The computation is expensive • The result is reused multiple times • It helps prevent unnecessary re-renders Otherwise, simple code is often better. Optimization should come after measurement, not before. Day 5/100 — sharing practical frontend engineering lessons. Do you usually optimize early, or only after profiling? #ReactJS #WebPerformance #FrontendEngineering #JavaScript #SoftwareArchitecture