How to use useUpdateEffect in React for better performance

A quick React reminder for developers: Avoid putting unnecessary logic inside useEffect(). Use useEffect only when you need to handle: • data fetching • subscriptions • event listeners • cleanup functions If your code runs correctly without an effect, it shouldn’t be inside one. Keeping effects clean makes components more predictable and improves performance. #React #FrontendDevelopment #CleanCode #JavaScript #WebDevelopment #FullStackDeveloper

⚡ Debounce vs Throttle — Quick Reminder Both improve performance by controlling how often a function runs — but: Debounce: ⏳ Waits until the action stops, then runs 👉 Best for search input, form typing, resize events Throttle: ⏱️ Runs at fixed intervals no matter what 👉 Best for scroll, drag, repeated clicks Rule of thumb: Stopping noise → debounce Limiting frequency → throttle Which one do you use more often? 👇 #javascript #frontend #react #webdev #performance

We love lazy loading. It sounds smart. “Load only what’s needed!” Except… sometimes, we overdo it. I once saw a project split 15 components into separate chunks — each under 10KB. On paper, perfect. In reality, 15 separate network requests killed performance. Sometimes one optimized bundle beats dozens of tiny ones. Rules I follow now: ✦ Lazy load pages, not every component. ✦ Measure before you “optimize.” ✦ Bundle intelligently — not just aggressively. Performance isn’t about “doing less” — it’s about doing what matters. What’s the most over-engineered “optimization” you’ve seen? #javascript #react #frontendperformance #webdev

🧩 useEffectEvent() is not a new kind of Effect — it’s a way to fix how we use them. React 19.2 introduced useEffectEvent to separate reactive logic from event-driven logic inside Effects. It helps prevent unnecessary re-runs when callbacks depend on changing props or state. But it’s easy to misunderstand 👇 ⚠️ It doesn’t replace useEffect. You still use useEffect for side-effects that react to state or prop changes. ⚠️ You can’t call hooks or trigger renders inside useEffectEvent. It’s only for stable event logic. ⚠️ It won’t automatically fix dependency issues — you still decide what should re-run. ⚠️ And it’s not meant to silence ESLint warnings. If the linter flags something, it’s usually for a reason. Takeaway: useEffectEvent makes Effects predictable, not optional. Use it to wrap event handlers inside Effects, not as a shortcut to avoid dependency management. #React19 #useEffectEvent #ReactTips #FrontendEngineering #JavaScript

⚛️ useEffect — A Simple Breakdown That Finally Made Sense for Me Today I revised useEffect, and I focused on understanding when and why it runs. Once you look at it step-by-step, it feels much more predictable. 🔹 Here’s the simple flow: 1️⃣ It runs after the component renders 2️⃣ It runs again when the values in the dependency array change 3️⃣ If there’s a cleanup function, that runs when the component unmounts 🔹 Dependency Array Cheat Sheet: [] → run only on mount [count] → run when count updates no array → run on every render (not common) 🔹 Cleanup Example: Useful for timers, subscriptions, or event listeners. useEffect(() => { const id = setInterval(() => { console.log("Boring (: ..."); }, 1000); return () => clearInterval(id); // cleanup }, []); Understanding this flow makes React feel smoother to work with. Learning the “why” behind hooks really helps in writing predictable and clean components. #ReactJS #useEffect #Hooks #FrontendDevelopment #WebDevelopment #JavaScript #BuildingInPublic #100DaysOfCode

𝗪𝗵𝗮𝘁'𝘀 𝗻𝗲𝘄 𝗶𝗻 𝗥𝗲𝗮𝗰𝘁 𝟭𝟵? The 𝘂𝘀𝗲𝗔𝗰𝘁𝗶𝗼𝗻𝗦𝘁𝗮𝘁𝗲 hook! This hook is a game-changer for managing form actions and state in functional components. It simplifies the process of handling form submissions, validations, and state updates. 𝗪𝗵𝘆 𝘂𝘀𝗲 𝗶𝘁? • Streamlines form handling by combining state management and actions in one place. • Reduces boilerplate code for form submissions and validations. • Enhances readability and maintainability of your form components. 𝗛𝗼𝘄 𝘁𝗼 𝘂𝘀𝗲 𝗶𝘁? → Import the hook from 'react': 𝗶𝗺𝗽𝗼𝗿𝘁 { 𝘂𝘀𝗲𝗔𝗰𝘁𝗶𝗼𝗻𝗦𝘁𝗮𝘁𝗲 } 𝗳𝗿𝗼𝗺 '𝗿𝗲𝗮𝗰𝘁' → Initialize the hook with default state and actions: 𝗰𝗼𝗻𝘀𝘁 [𝘀𝘁𝗮𝘁𝗲, 𝗮𝗰𝘁𝗶𝗼𝗻𝘀] = 𝘂𝘀𝗲𝗔𝗰𝘁𝗶𝗼𝗻𝗦𝘁𝗮𝘁𝗲({ 𝗱𝗲𝗳𝗮𝘂𝗹𝘁𝗦𝘁𝗮𝘁𝗲: 𝗶𝗻𝗶𝘁𝗶𝗮𝗹𝗦𝘁𝗮𝘁𝗲 }) → Use 𝘀𝘁𝗮𝘁𝗲 to manage form state and 𝗮𝗰𝘁𝗶𝗼𝗻𝘀 to handle form actions. 𝗘𝘅𝗮𝗺𝗽𝗹𝗲: 𝗰𝗼𝗻𝘀𝘁 [𝗳𝗼𝗿𝗺𝗦𝘁𝗮𝘁𝗲, 𝗳𝗼𝗿𝗺𝗔𝗰𝘁𝗶𝗼𝗻𝘀] = 𝘂𝘀𝗲𝗔𝗰𝘁𝗶𝗼𝗻𝗦𝘁𝗮𝘁𝗲({ 𝗱𝗲𝗳𝗮𝘂𝗹𝘁𝗦𝘁𝗮𝘁𝗲: { 𝗻𝗮𝗺𝗲: '', 𝗲𝗺𝗮𝗶𝗹: '' }, 𝗮𝗰𝘁𝗶𝗼𝗻𝘀: { 𝘀𝗲𝘁𝗡𝗮𝗺𝗲: (𝗻𝗮𝗺𝗲) => { 𝗳𝗼𝗿𝗺𝗦𝘁𝗮𝘁𝗲.𝗻𝗮𝗺𝗲 = 𝗻𝗮𝗺𝗲 }, 𝘀𝘂𝗯𝗺𝗶𝘁: () => { 𝗮𝗹𝗲𝗿𝘁('𝗙𝗼𝗿𝗺 𝘀𝘂𝗯𝗺𝗶𝘁𝘁𝗲𝗱!') } } }) 𝗦𝗮𝘃𝗲 𝘁𝗶𝗺𝗲, 𝗿𝗲𝗱𝘂𝗰𝗲 𝗯𝗼𝗶𝗹𝗲𝗿𝗽𝗹𝗮𝘁𝗲, 𝗮𝗻𝗱 𝗶𝗺𝗽𝗿𝗼𝘃𝗲 𝘂𝘀𝗲𝗿 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲! #React19 #ReactHooks #FormHandling #JavaScript #WebDevelopment #TechTips #CodingCommunity

⚙️ Ever wondered how JavaScript actually executes your code behind the scenes? 🤔 It’s not magic — it’s how the engine works! 🚀 👉 The JavaScript Engine (like V8) runs your code in two main phases: 1️⃣ Memory Creation Phase – Variables and functions get allocated in memory. 2️⃣ Execution Phase – Code runs line by line inside the Call Stack. 🧠 When asynchronous tasks (like setTimeout, API calls, or Promises) come in — they move to the Web APIs, then to the Callback Queue / Microtask Queue, and finally back to the Call Stack through the Event Loop. That’s the secret sauce of how JavaScript handles concurrency and non-blocking execution so smoothly! 💫 #JavaScript #WebDevelopment #MERNStack #CodingJourney #EventLoop #AsyncJS #V8Engine #Developers #TechCommunity #NamasteJavaScript

Ever wondered how JavaScript really works behind the scenes? It’s not magic, it’s a clever system working together. The JS engine runs your code using a call stack and heap, while the browser adds extra powers like Web APIs (for setTimeout, fetch, and DOM events). Then comes the Event Loop, making sure JavaScript stays fast, non-blocking, and asynchronous even though it runs on a single thread. Once you get this, async code suddenly clicks. #JavaScript #WebDevelopment #Frontend #AsyncProgramming #EventLoop #Learning

𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 : 1. Closures & Scope 2. Event Loop & Async 3. Promises & Async/Await 4. Hoisting & This Keyword 5. Prototypes & Inheritance 𝗥𝗲𝗮𝗰𝘁 : 6. useState & useEffect 7. Context API & useContext 8. Custom Hooks 9. Component Lifecycle 10. State Management (Redux/Zustand) 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 & 𝗢𝗽𝘁𝗶𝗺𝗶𝘇𝗮𝘁𝗶𝗼𝗻: 11. Code Splitting & Lazy Loading 12. Memoization (useMemo, useCallback) 13. Virtual DOM & Reconciliation 14. Bundle Optimization 15. Web Vitals & Performance Metrics 𝗘𝘀𝘀𝗲𝗻𝘁𝗶𝗮𝗹 𝗖𝗼𝗻𝗰𝗲𝗽𝘁𝘀: 16. Event Delegation & Bubbling 17. Debouncing & Throttling 18. Error Boundaries & Error Handling 19. Browser Storage (localStorage, sessionStorage) 20. REST APIs & HTTP Methods #js #javascript #interview

𝗠𝗮𝘀𝘁𝗲𝗿𝗶𝗻𝗴 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 𝗘𝘃𝗲𝗻𝘁𝘀 – 𝗧𝗵𝗲 𝗕𝗮𝗰𝗸𝗯𝗼𝗻𝗲 𝗼𝗳 𝗜𝗻𝘁𝗲𝗿𝗮𝗰𝘁𝗶𝘃𝗲 𝗪𝗲𝗯 𝗔𝗽𝗽𝘀! Ever wondered how a simple click, hover, or keypress instantly brings a website to life? That’s the magic of JavaScript Events – the powerful triggers that respond to user interactions and make web pages dynamic and engaging. In my latest breakdown, I explore: - What JavaScript Events are - How Event Listeners work - Common events like onclick, onkeyup, onchange, onsubmit - Event Bubbling vs Capturing - Real-world examples and use cases Whether you’re a beginner learning DOM manipulation or preparing for frontend interviews, understanding events is a game-changer! If you want a deeper dive with examples and best practices, let me know in the comments – I’d love to share a full guide or cheat sheet! Follow me for more and repost this to help others for daily JS insights, frontend tips, and developer-friendly guides! #JavaScript #FrontendDevelopment #WebDevelopment #DOMEvents #CodingTips #ReactJS #LearnToCode #Developers