How useState works in React: A deep dive

After completing #NamasteJavaScript, I’ve now started #NamasteReact by Akshay Saini 🚀 Today, I completed Episode 1: Inception, where I learned the fundamentals and core basics of React — an exciting start to this new journey! ⚛️🔥 🔹 Emmet A toolkit for web developers that expands short abbreviations into full HTML or CSS code. Helps write code faster and boosts productivity ⚡ 🌍 CDN (Content Delivery Network) A global network of servers that delivers web content (images, videos, scripts) faster. Improves website speed, reliability, and scalability 🚀 ⚛️ React Named “React” because it reacts to user interactions dynamically. Efficiently updates the UI when users click, type, or submit forms. 🔒 Crossorigin Attribute Used in <script> tags to handle CORS (Cross-Origin Resource Sharing) requests. Allows resources to be shared securely between different domains. ⚙️ React vs ReactDOM React → Builds UI components. ReactDOM → Connects React with the browser’s DOM. 🧱 Development vs Production Build react.development.js → Slower, includes helpful debugging messages 🐞 react.production.js → Optimized and faster ⚡ (used in live apps) ⏩ Async vs Defer in Script Tags Async → Script loads and runs immediately (doesn’t wait for HTML parsing). Defer → Script loads in background and runs after HTML is parsed. 📚 Library vs Framework Library → You call the library’s code (e.g., React). Framework → The framework calls your code (e.g., Angular). Library = Flexibility 🧩 | Framework = Structure 🧱 #WebDevelopment #ReactJS #Frontend #JavaScript #LearningJourney #Coding #Programming #cleancode #softwareEngineer #Devlife #linkedinjourney #LearningJourney #CareerGrowth #CodeSmarter #NamasteReact #inception #react #AkshaySaini #reactDom #fullstackdeveloper

𝗛𝗼𝘄 𝗜 𝗜𝗺𝗽𝗿𝗼𝘃𝗲𝗱 𝗥𝗲𝗮𝗰𝘁 𝗔𝗽𝗽 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝗪𝗶𝘁𝗵𝗼𝘂𝘁 𝗖𝗵𝗮𝗻𝗴𝗶𝗻𝗴 𝘁𝗵𝗲 𝗨𝗜 Performance isn’t always about redesigning; sometimes, it’s about rethinking. I once worked on a React project that looked fine but felt sluggish. Components re-rendered too often, and users felt the lag. Here’s what helped me optimize it without rewriting everything 👇 𝗨𝘀𝗲 𝗥𝗲𝗮𝗰𝘁.𝗺𝗲𝗺𝗼: Prevents re-renders when props don’t change. 𝗨𝘀𝗲 𝘂𝘀𝗲𝗖𝗮𝗹𝗹𝗯𝗮𝗰𝗸 𝗮𝗻𝗱 𝘂𝘀𝗲𝗠𝗲𝗺𝗼: Keeps functions and values stable between renders. 𝗖𝗼𝗱𝗲 𝘀𝗽𝗹𝗶𝘁𝘁𝗶𝗻𝗴: Load only what’s needed with dynamic imports. 𝗟𝗮𝘇𝘆 𝗹𝗼𝗮𝗱𝗶𝗻𝗴: Defer non-critical components to speed up the initial load. 𝗔𝗻𝗮𝗹𝘆𝘇𝗲 𝗯𝗲𝗳𝗼𝗿𝗲 𝗴𝘂𝗲𝘀𝘀𝗶𝗻𝗴: Tools like React Profiler help you see where the slowdown actually happens. These small optimizations dropped the load time by 𝟰𝟬% and users immediately felt the difference. 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝗶𝘀 𝗻𝗼𝘁 𝗺𝗮𝗴𝗶𝗰, 𝗶𝘁’𝘀 𝗱𝗶𝘀𝗰𝗶𝗽𝗹𝗶𝗻𝗲. #Reactjs #FrontendPerformance #WebDevelopment #Nextjs #Optimization #JavaScript #FullStackDeveloper #CodingTips #FrontendEngineer

💭 𝐄𝐯𝐞𝐫 𝐭𝐫𝐢𝐞𝐝 𝐛𝐮𝐢𝐥𝐝𝐢𝐧𝐠 𝐚𝐧 𝐔𝐧𝐝𝐨-𝐑𝐞𝐝𝐨 𝐟𝐞𝐚𝐭𝐮𝐫𝐞 𝐟𝐫𝐨𝐦 𝐬𝐜𝐫𝐚𝐭𝐜𝐡 𝐢𝐧 𝐑𝐞𝐚𝐜𝐭? I recently solved this interesting question by Akshay Saini 🚀 — and it turned into a great hands-on way to understand how React manages state, history, and immutability. 🎯 𝗧𝗵𝗲 𝗚𝗼𝗮𝗹 To build a text editor where we can move the state both backward (Undo) and forward (Redo) — just like in a real text editor 📝. ⚙️ 𝗧𝗵𝗲 𝗖𝗼𝗿𝗲 𝗖𝗼𝗻𝗰𝗲𝗽𝘁 Think of it like managing a timeline of states. Each time you type, React stores a snapshot of that text in a history array. We keep track of: 👉 text → current value 👉 history → list of all text snapshots 👉 currentIndex → pointer to where we are in the timeline When you: 🔹 𝐓𝐲𝐩𝐞 𝐬𝐨𝐦𝐞𝐭𝐡𝐢𝐧𝐠 𝐧𝐞𝐰: Add it to history and move forward. 🔹 𝐔𝐧𝐝𝐨: Move one step backward and show an older value. 🔹 𝐑𝐞𝐝𝐨: Move one step forward again to the latest value. If you type something after undoing, the “future” history is removed — you’ve now created a new branch of edits 🔁 💡 𝗛𝗶𝘀𝘁𝗼𝗿𝘆 𝗜𝗻 𝗔𝗰𝘁𝗶𝗼𝗻 a ➡️ ["a"] (currentIndex = 0) am ➡️ ["a", "am"] (currentIndex = 1) ama ➡️ ["a", "am", "ama"] (currentIndex = 2) Undo ⏪ → back to "am" amf ➡️ ["a", "am", "amf"] (currentIndex = 2) ✅ If we don’t remove the future states after undo, redo stops working — because we’re mixing old and new timelines 💥 That’s the trick: always keep a clean timeline of history 🕓 🧠 𝗪𝗵𝗮𝘁 𝗜 𝗟𝗲𝗮𝗿𝗻𝗲𝗱 This challenge gave me a much deeper understanding of how time-travel state management works — the same concept that powers Redux DevTools 💻 𝐅𝐮𝐥𝐥 𝐪𝐮𝐞𝐬𝐭𝐢𝐨𝐧 : https://lnkd.in/dt3Yn3pJ 🔗 𝗰𝗼𝗱𝗲: https://lnkd.in/dpuRtiuj 💬 What would you do differently — or how would you optimize this approach? Drop your thoughts below 👇 #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #StateManagement #CodeLearning

🚀 Mastering useEffect in React If you’ve ever wondered why your component keeps re-rendering, or how to handle side effects properly, useEffect is your best friend (when used right!). 🧠 What is useEffect? useEffect lets you perform side effects in functional components — like fetching data, updating the DOM, or setting up event listeners. 💡 Basic Syntax useEffect(() => { // Side effect logic here return () => { // Cleanup (optional) }; }, [dependencies]); ⚙️ Dependency Array Explained [] → runs only once (on mount) [variable] → runs when variable changes (no array) → runs after every render 🧩 Common Use Cases ✅ Fetching data from an API ✅ Subscribing / unsubscribing to events ✅ Managing timers or intervals ✅ Syncing state with localStorage ⚠️ Avoid These Mistakes ❌ Forgetting the dependency array ❌ Updating state inside useEffect without proper dependencies (infinite loop alert 🚨) ❌ Not cleaning up event listeners or intervals 🌱 Pro Tip Always think of useEffect as a lifecycle tool — it replaces componentDidMount, componentDidUpdate, and componentWillUnmount from class components. #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #ReactHooks #useEffect

When was the last time you consciously fought against “callback hell” in your JavaScript code? If it’s been a while, it’s probably because async/await has become such a game changer—making asynchronous code look synchronous, clean, and far easier to read. But here’s an interesting twist: **top-level await** is now officially part of modern JavaScript, and it’s transforming how we write modules, scripts, and test code. Traditionally, you could only use await inside async functions, but with top-level await, you can pause module execution directly at the root level without wrapping everything in `async function`. This feature is supported in most modern browsers and Node.js (from v14.8+), and it unlocks some exciting possibilities. Imagine loading data or initializing resources right when your module runs, something like: ```js const response = await fetch('https://lnkd.in/gwifyc_J'); const config = await response.json(); console.log('Config loaded:', config); ``` No async wrapper needed! This makes initialization scripts and module loading much more straightforward. It also improves readability for complex dependency chains because modules can wait on promises before exporting values. A few quick tips when using top-level await: - The module that uses top-level await becomes asynchronous itself. So, other modules importing it will implicitly wait until the awaited code completes. - Avoid blocking too long at the top level, or your app's startup may slow down. - It’s perfect for scripts or small initialization routines, especially in Next.js, ESM-based projects, or serverless functions. Seeing this in action can change how you architect your app startup logic or handle configuration loading. No more boilerplate async wrappers cluttering your code! So, if you’re still wrapping everything in `async function main() { ... }` just to use await, give top-level await a try. Cleaner, simpler, and modern JavaScript at its best. Who else is excited to use this feature in production? Drop your thoughts or experiences below! #JavaScript #ESModules #AsyncAwait #WebDevelopment #ModernJS #CodingTips #TechTrends #SoftwareEngineering

⚛️ React Just Made Form Actions Way Cleaner React’s new hook — useActionState — is a game-changer for handling async form submissions. No more juggling useState, useEffect, or endless try/catch blocks. 🙌 Here’s what it does 👇 🧩 You pass it: A form action (e.g., addToCart) An initial state It gives you back three things: 1️⃣ The latest state (e.g., message or result) 2️⃣ A wrapped action (formAction) 3️⃣ A flag showing if it’s still running (isPending) Now your form logic becomes simpler, more declarative, and easier to read. Just write the action, hook it up, and React handles the rest. It’s a small addition but one that makes a big difference in building clean, async-ready UIs. ⚡ 💬 Have you tried useActionState yet? What’s your take on React’s direction with these new declarative patterns? #ReactJS #JavaScript #WebDevelopment #Frontend #ReactHooks #CleanCode #AsyncProgramming #DeveloperExperience #SoftwareEngineering #CodingTips #ReactDevelopers #DevCommunity #UIUX

😂 The Developer’s Journey in One Line 😂 You learn JavaScript core concepts, master React fundamentals, discuss scalable design, explain optimization techniques, communicate like a pro 💬... and then 💀 you spend your day removing overflow: hidden or fighting that 3px gap because someone made it position: absolute without managing its z-index 😭 Ah yes — the true full-stack experience 😎 #WebDeveloper #ReactJS #FrontendHumor #CodingLife #DevStruggles #JavaScript #CSSWar #UIUX #TechLife #RelatableDev #FrontendDeveloper

Master React Hooks with clarity and purpose I recently saw some posts explaning abut React Hooks and I would like to bring a post talking about it to remember how they work. Here some of them that I use on my dailys - useState: manage local state inside functional components. - useEffect: handle side effects like data fetching or subscriptions. - useRef: keep mutable values between renders or reference DOM elements. - useContext: share data across components without prop drilling. - useReducer: a great choice for complex state logic. - useMemo & useCallback: prevent unnecessary recalculations and re-renders. - useLayoutEffect: runs before the browser paints, useful for DOM measurements. - Advanced ones like useDebugValue or useImperativeHandle serve specific use cases. 💡 My thoughts As a full-stack developer, I’m always chasing cleaner and more scalable front-end patterns. React Hooks, when used thoughtfully, make components more modular, predictable, and performant. 🚀 Pro tip If you’re learning React or mentoring others, pick one hook per day and test it in a small component. Real experimentation beats memorization. #React #Frontend #WebDevelopment #Hooks #JavaScript #NextJS #DevTips #CleanCode

🛣️ 𝗥𝗲𝗮𝗰𝘁 𝗥𝗼𝗮𝗱𝗺𝗮𝗽 — 𝗬𝗼𝘂𝗿 𝗣𝗮𝘁𝗵 𝘁𝗼 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗠𝗮𝘀𝘁𝗲𝗿𝘆 🚀 If you’re serious about becoming a skilled frontend developer, mastering React is a must. But with so many topics, tools, and libraries — knowing where to start and how to grow can feel overwhelming. 𝗛𝗲𝗿𝗲’𝘀 𝗮 𝗰𝗼𝗺𝗽𝗹𝗲𝘁𝗲 𝗥𝗲𝗮𝗰𝘁 𝗥𝗼𝗮𝗱𝗺𝗮𝗽 𝘁𝗵𝗮𝘁 𝗴𝘂𝗶𝗱𝗲𝘀 𝘆𝗼𝘂 𝘁𝗵𝗿𝗼𝘂𝗴𝗵 𝗲𝘃𝗲𝗿𝘆 𝘀𝘁𝗮𝗴𝗲: ✅ 𝗕𝗲𝗳𝗼𝗿𝗲 𝗥𝗲𝗮𝗰𝘁: Brush up on HTML, CSS, and modern JavaScript fundamentals. ✅ 𝗖𝗼𝗿𝗲 𝗥𝗲𝗮𝗰𝘁: Learn components, props, state, hooks, and lifecycle methods. ✅ 𝗔𝗱𝘃𝗮𝗻𝗰𝗲𝗱 𝗥𝗲𝗮𝗰𝘁: Dive into Context API, performance optimization, and state management tools like Redux or Zustand. ✅ 𝗘𝗰𝗼𝘀𝘆𝘀𝘁𝗲𝗺 & 𝗧𝗼𝗼𝗹𝘀: Explore React Router, testing libraries, build tools, and deployment strategies. Whether you’re a beginner taking your first step or an intermediate dev aiming to go pro — this roadmap gives you the clarity, structure, and confidence to progress effectively. 💪 💬 𝑊ℎ𝑎𝑡’𝑠 𝑜𝑛𝑒 𝑅𝑒𝑎𝑐𝑡 𝑡𝑜𝑝𝑖𝑐 𝑡ℎ𝑎𝑡 𝑤𝑎𝑠 𝑡𝑜𝑢𝑔ℎ 𝑓𝑜𝑟 𝑦𝑜𝑢 𝑖𝑛𝑖𝑡𝑖𝑎𝑙𝑙𝑦 𝑏𝑢𝑡 𝑛𝑜𝑤 𝑓𝑒𝑒𝑙𝑠 𝑒𝑎𝑠𝑦? 𝐷𝑟𝑜𝑝 𝑖𝑡 𝑏𝑒𝑙𝑜𝑤 — 𝑙𝑒𝑡’𝑠 𝑙𝑒𝑎𝑟𝑛 𝑡𝑜𝑔𝑒𝑡ℎ𝑒𝑟! 👇 📌 𝗥𝗲𝘀𝗼𝘂𝗿𝗰𝗲𝘀 𝘁𝗼 𝗔𝗰𝗰𝗲𝗹𝗲𝗿𝗮𝘁𝗲 𝗬𝗼𝘂𝗿 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗝𝗼𝘂𝗿𝗻𝗲𝘆 📘 𝗖𝗮𝗿𝗲𝗲𝗿 𝗚𝘂𝗶𝗱𝗮𝗻𝗰𝗲 – 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 : https://lnkd.in/guhaEEQP 🎯 𝗕𝗼𝗼𝘀𝘁 𝗬𝗼𝘂𝗿 𝗟𝗶𝗻𝗸𝗲𝗱𝗜𝗻 𝗮𝗻𝗱 𝗡𝗮𝘂𝗸𝗿𝗶 𝗣𝗿𝗼𝗳𝗶𝗹𝗲: https://lnkd.in/gz4Uu8Ug 📕 𝗥𝗲𝘀𝘂𝗺𝗲 𝗥𝗲𝘃𝗶𝗲𝘄 𝗮𝗻𝗱 𝗢𝗽𝘁𝗶𝗺𝗶𝘇𝗮𝘁𝗶𝗼𝗻 https://lnkd.in/g3hkDm-J #React #FrontendDevelopment #WebDevelopment #JavaScript #LearnReact #CodingJourney #Roadmap #DeveloperGrowth