Prevent Infinite useEffect Loop with Dependency Array

Ever wondered why your JavaScript logs run out of order? This is one of the most common async mistakes. The fix isn’t complex — it’s async/await. Once you see it, you can’t unsee it. Cleaner flow. Predictable output. Better code. Try this pattern in your code today. #JavaScript #AsyncAwait #WebDevelopment #Frontend #SoftwareEngineering #makstyle119

Most developers don’t know this about JavaScript closures 🤯 Closures are not magic. They simply remember the variables even after the function is executed. That’s why: • setTimeout • Event listeners • Callbacks work so smoothly. If closures confuse you → practice small examples, not big codebases. Question: What topic confused you the most in JavaScript? 👇 #JavaScript #WebDevelopment #Frontend #CodingLife

In React, memoizing a component doesn't always prevent rerendering. We use the memo API to memoize a component to optimise performance. It is essential to understand that the memo API only works if the props remain the same and the component is pure. However, a memoised component with the following attributes will re-render. 1. The state gets set internally 2. Using a context that gets updated The memo works wrt values updated and passed from the parent, not the internal ones. By understanding it, one can avoid bugs and build reliable components. Have you noticed this behaviour earlier? #react #javascript #frontend

What happens actually when you call setState() (Reconciliation phases) 1. Render phase: - React creates Virtual DOM - Compares it with previous one - Decides what needs to change - No real DOM updates here 2. Commit phase: - React applies the changes to real DOM. - Runs lifecycle methods and hooks like: useLayoutEffect 3. Commit phase (Final step): - Runs side effects: useEffects: - Cleanup of previous effects Understanding reconciliation helps you write better, performance-friendly components. #frontend #reactjs #javascript

Understanding React lifecycle helped me clear a lot of confusion around component behavior ⚛️ When working with parent and child class components, React follows a specific mounting order: Mounting order 🧩 1. Parent constructor 2. Parent render 3. Child constructor(s) 4. Child render(s) 5. Child componentDidMount(s) 6. Parent componentDidMount Key idea 💡 1. Rendering happens top to bottom 2. componentDidMount runs bottom to top In modern React, the same lifecycle logic is handled using hooks 🔁 1. componentDidMount → useEffect(() => {}, []) 2. componentWillUnmount → cleanup function inside useEffect Different syntax, same underlying behavior. #ReactJS #JavaScript #FrontendDevelopment #WebDevelopment

🚀 Debounce is the easiest way to stop unnecessary API calls. Instead of reacting to every small change, it waits until the user pauses before taking action. I noticed this when working on a search input. Every keystroke was triggering work that didn’t really need to happen. Once I added debounce, everything felt better: ✅ fewer actions running ✅ smoother interactions ✅ cleaner logic In this carousel, I share: 👉 how debounce works in simple terms 👉 a clean useDebounce example for React / Next.js 👉 why this small change made a real difference Swipe through — this is one of those patterns I wish I learned earlier 👇 #React #NextJS #Frontend #JavaScript #WebDevelopment #Performance #SoftwareEngineering

📘 Understanding the useEffect Dependency Array (Finally!) After watching a long and technical lecture on React’s useEffect, I realized that the real confusion was not the hook itself—but the dependency array. Here’s how I finally understood it 👇 The dependency array usually contains state or props. React watches these values, and when any of them change, the useEffect runs again. That’s it. No magic. No overthinking. For example: Empty array [ ] → effect runs only once [state] → effect runs when state changes No array → effect runs on every render The most important realization for me was this: 👉 useEffect does not cause re-renders 👉 State/props changes cause re-renders, and useEffect reacts to those changes Once this clicked, everything became much clearer. Sharing this in case it helps someone who’s currently struggling with React hooks like I was Learning step by step. #ReactJS #useEffect #JavaScript #WebDevelopment #LearningInPublic #FrontendDevelopment

🚦 AbortController — most devs use it for API calls… but it can do more Most developers use AbortController to cancel an API request. That’s usually where the story ends. But recently, while cleaning up a useEffect, I realized something interesting 👀 AbortController isn’t limited to fetch. You can pass its signal to event listeners too. One controller. Multiple events. One clean cleanup. ✨ 💡 Why this feels good No removeEventListener Cleaner useEffect cleanup Fewer bugs & memory leaks Very React-friendly #JavaScript #ReactJS #WebDevelopment #Frontend #CleanCode #AbortController #ReactHooks #DeveloperTips 🚀

𝗗𝗮𝗻𝗴𝗲𝗿𝗼𝘂𝘀 𝗥𝗲𝗮𝗰𝘁 𝗵𝗮𝗯𝗶𝘁 𝗶𝗻 𝟮𝟬𝟮𝟲: 𝗣𝘂𝘁𝘁𝗶𝗻𝗴 𝗵𝗲𝗮𝘃𝘆 𝗰𝗼𝗺𝗽𝘂𝘁𝗮𝘁𝗶𝗼𝗻𝘀 𝗱𝗶𝗿𝗲𝗰𝘁𝗹𝘆 𝗶𝗻 𝗿𝗲𝗻𝗱𝗲𝗿(). It kills performance and makes debugging painful. Better way: Move them to useMemo(). Old way: return expensiveCalculation(props.data); New way: const result = useMemo(() => expensiveCalculation(props.data), [props.data]); Simple fix, huge impact. What’s one React mistake you fixed recently? Building something performant? My gig: https://lnkd.in/gixh_dTi #ReactJS #JavaScript #FrontendDevelopment

Want to see how React Server Components work under the hood? RSC Explorer, a browser-based tool that visualizes the RSC protocol in action. Step through real protocol chunks, watch JSX reconstruct, and explore how client/server code references work. It's a fantastic learning resource: https://lnkd.in/gD4ZaHXN #ReactJS #WebDev #JavaScript #Frontend