React Hooks Explained: State, Effects, and More

While working on React forms, I finally understood the real difference between useState and useRef — and it completely changed how I think about handling data. At first, both looked similar because both can store values. But their behavior is very different. 🔹 useState • Used to store data that affects UI • When state changes → component re-renders • Best for dynamic data (inputs, counters, UI updates) Example: form input, toggles, live data --- 🔹 useRef • Used to store values without re-rendering • Directly access DOM elements • Value persists across renders but doesn’t trigger UI update Example: accessing input field, focusing input, storing previous value --- 🧠 Simple way to understand: 👉 useState = “Update UI” 👉 useRef = “Store value without re-render” --- 💡 Real-world example: In a form: • useState → to store input value • useRef → to focus input or get value without re-render --- What I learned: Choosing the right hook improves performance and keeps code clean. Still learning React deeply and building projects step by step 🚀 #ReactJS #JavaScript #FrontendDevelopment #WebDevelopment #CodingJourney #LearnInPublic

How I Keep My React Components Clean and Maintainable Over time, I’ve realized that clean code isn’t just about making things work it’s about making them easy to understand, reuse, and scale. Here’s what I focus on 1. Small Components Break UI into smaller pieces instead of one big component. Smaller components are easier to read, test, and debug. 2. Reusable Logic Avoid repeating the same logic everywhere. If something is used multiple times, extract it. 3. Custom Hooks Move logic into custom hooks like useFetch, useAuth, etc. This keeps components clean and focused only on UI. 4. Separation of Concerns Keep UI, logic, and data handling separate. Don’t mix everything in one file. Clean components = Better performance + Easier maintenance + Faster development What’s your approach to writing clean React code? #React #FrontendDevelopment #JavaScript #WebDevelopment #CleanCode #CodingTips

🚀 React Hooks Small Projects I recently worked on a few small projects to better understand some important React Hooks. In this video, I demonstrated how these hooks work with simple examples so that beginners can easily understand their usage. 🔹 useState – Used to manage state inside a functional component. It helps update and display dynamic data in the UI. 🔹 useEffect – Used to handle side effects in React applications such as API calls, timers, and updating the DOM when state changes. 🔹 useContext – Helps share data globally across components without passing props manually through every level. 🔹 useReducer – A powerful hook for managing complex state logic, especially when multiple state updates depend on different actions. 🔹 useMemo – Optimizes performance by memoizing expensive calculations so they only run when dependencies change. 🔹 useCallback – Returns a memoized function to prevent unnecessary re-renders when passing functions to child components. These mini projects helped me strengthen my understanding of React Hooks and component optimization techniques. 📌 If you watch the video, you can easily understand how each hook works in a practical way. #ReactJS #ReactHooks #WebDevelopment #MERNStack #JavaScript #FrontendDevelopment #CodingPractice

💡 React Tip: Why Functional Components Are the Standard Today When I started working with React, class components were widely used. But over time, functional components have become the preferred approach — especially with the introduction of React Hooks. Here are a few reasons why developers prefer functional components today: ✅ Cleaner and simpler code – Less boilerplate compared to class components ✅ Hooks support – Hooks like useState, useEffect, and useMemo make state and lifecycle management easier ✅ Better readability – Logic can be grouped by functionality instead of lifecycle methods ✅ Improved performance optimization – Tools like React.memo and hooks make optimization easier Example: function Counter() { const [count, setCount] = React.useState(0); return ( <button onClick={() => setCount(count + 1)}> Count: {count} </button> ); } Functional components combined with Hooks make React development more scalable, maintainable, and easier to reason about. 📌 Curious to know from other developers: Do you still use class components in production projects, or have you fully moved to functional components? #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #ReactHooks

Syntax is easy, but making it responsive and scalable is where the real fun begins! 🚀 Today, I built a Professional Portfolio Footer for my React journey. While it looks like a simple footer, I focused on some core development principles: ✅ DRY (Don't Repeat Yourself): Instead of hardcoding 10+ links, I used the .map() method to render them dynamically from arrays. ✅ Mobile First: Used Flexbox logic to make sure the layout shifts perfectly from a 3-column desktop view to a single-column mobile view. ✅ Clean UI: Added smooth hover transitions and a consistent dark-theme color palette. Small wins like these are building my confidence to take on larger MERN stack projects. Slow and steady, but the logic is getting stronger every day! 💪 Check out the code in my repo:https://lnkd.in/gXKE66AF #ReactJS #WebDevelopment #Frontend #CodingLogic #MERNStack #CSS #LearningToCode

How React Remembers State Between Renders? When a component re-renders, the function runs again from top to bottom. So how does useState not reset every time? 🤔 function Counter() { const [count, setCount] = React.useState(0); return <button onClick={() => setCount(count + 1)}>{count}</button>; } Every render: The function runs again and Variables are recreated. So why doesn’t count go back to 0? What Actually Happens Internally React stores state outside the component function. Behind the scenes: 1) Each component has a Fiber node 2) React keeps a linked list of Hooks 3) It tracks Hooks based on call order State is not stored in your function. It’s stored in React’s internal Fiber system. The function is just a way for React to describe UI. Understanding this makes Hooks feel much less magical. #ReactJS #ReactInternals #ReactHooks #FrontendDevelopment #SoftwareEngineering #JavaScript

⚛️ 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

React keeps evolving, but my brain doesn’t refresh as fast as the docs—so I built a compact React A–Z cheat sheet I can rely on instead of my memory. This is a high‑density desk reference for working React devs: JSX and rendering basics, state management (from useState/useReducer/Context to Redux Toolkit and Zustand), modern hooks, React 19 features, data fetching, forms, styling, testing, and architecture—condensed into a few focused pages. Instead of juggling 20 documentation tabs, you can keep this one sheet open next to your editor, quickly find the concept or keyword you need, and get back to shipping features faster. It’s not a tutorial, it’s a quick “React control panel” for people who already build apps and just want to move faster with fewer interruptions. #ReactJS #React19 #JavaScript #Frontend #WebDevelopment #MERNStack #ReactHooks #ReduxToolkit #TypeScript #NextJS #Remix #ReactNative #Programming #CheatSheet #SoftwareEngineering

🚀 React Performance Tip: Lazy Loading One of the most effective ways to improve performance in React applications is Lazy Loading. Instead of loading the entire JavaScript bundle at once, React allows us to load components only when they are needed. This technique is widely used in large-scale applications to improve user experience and reduce initial load time. 🔹 Common Lazy Loading Use Cases: 1️⃣ Lazy loading components 2️⃣ Lazy loading routes with React Router 3️⃣ Lazy loading images for faster page rendering 4️⃣ Loading heavy libraries only when required Example: const Profile = React.lazy(() => import("./Profile")); <Suspense fallback={<div>Loading...</div>}> <Profile /> </Suspense> 💡 Benefits: ✔ Faster initial page load ✔ Smaller bundle size ✔ Better performance ✔ Improved user experience Lazy loading is a must-know optimization technique for modern frontend developers, especially when building large React applications. Are you using lazy loading in your projects? 👇 #ReactJS #FrontendDevelopment #WebPerformance #JavaScript #CodeSplitting #ReactDeveloper #SoftwareEngineering #WebDevelopment #Programming #FrontendEngineer

🛑 Stop using nested ternaries in your React components. If you’ve built React apps with multiple user roles or complex statuses, you’ve probably seen the "JSX Pyramid of Doom." condition1 ? <A/> : condition2 ? <B/> : <C/> It works... until Product asks for a 4th and 5th variation. Suddenly, your return statement is a massive, unreadable block of ? and : . We already know that Guard Clauses fix messy business logic. But how do we fix messy JSX rendering? The easiest fix: The Component Map (Dictionary Pattern). 🗺️ Instead of writing if/else or chained ternaries inside your markup, map your conditions to their respective components using a simple JavaScript object. Why this wins: ✅ Readability: Your actual JSX return statement becomes exactly one line. ✅ Extensibility: Want to add a "Moderator" role? Just add one line to the object. You don't even have to touch the component logic. ✅ Performance: Object property lookup is O(1). No more evaluating chains of conditions. Stop forcing your JSX to do the heavy lifting. Let data structures do it for you. 🧠 Are you Team Ternary or Team Map? 👇 #ReactJS #FrontendDevelopment #CleanCode #JavaScript #TypeScript #WebDev #SoftwareArchitecture