Magdum Shaikh’s Post

💡 JavaScript Tip – What is a Closure? Closures are one of the most powerful concepts in JavaScript. A closure is created when a function remembers variables from its outer scope, even after the outer function has finished executing. function outer() { let count = 0; return function inner() { count++; console.log(count); }; } const counter = outer(); counter(); // 1 counter(); // 2 counter(); // 3 🔹 Here, the inner function still has access to the count variable, even after outer has finished executing. 👉 This is called a closure. 📌 Where it is used? Data hiding Creating private variables Callbacks & event handlers Understanding closures helps you write better and more advanced JavaScript code. As a Frontend Developer with 2 years of experience in React.js, I enjoy learning and sharing core JavaScript concepts. Currently looking for Frontend Developer / React.js opportunities and available for immediate joining. #JavaScript #FrontendDeveloper #ReactJS #WebDevelopment #CodingTips #DeveloperTips #Closures #SoftwareDeveloper #TechLearning #OpenToWork #ImmediateJoiner #ITJobs #HiringNow

I’ve been thinking a lot about what “progress” really means as a frontend developer. For a while, I measured it by how many features I shipped or how many tools I learned. But lately, that definition has changed. With ~5 years in frontend, I’ve started paying more attention to how I build — not just what I build. So these days, my focus looks a bit different: – Breaking down JavaScript problems until the logic feels natural, not memorized – Writing React code that scales well, not just passes the requirement – Paying attention to performance, edge cases, and real user behavior – Treating UI as a system, not a collection of components I’ve realized growth at this stage is quieter. It’s in cleaner code, better decisions, and fewer “quick fixes.” Currently spending time sharpening these fundamentals and being more intentional with the kind of problems I solve. Also open to opportunities where I can contribute meaningfully and continue evolving with a strong team. What’s something you’ve recently started looking at differently in your work? #frontenddeveloper #ReactJs #JavaScript #FrontEndDeveloper #WebDeveloper #UIDeveloper #OpenToWork #frontenddeveloperjob #JobSeekers

🚨 Recently ran into this bug in a React Native project—and it took a while to figure out. The state was updating correctly… but inside a function, it kept showing the OLD value 😳 👉 Turns out, it was the Stale Closure Problem const [count, setCount] = useState(0); useEffect(() => { setInterval(() => { console.log(count); // ❌ Always 0 }, 1000); }, []); Even after updating count, it keeps logging the old value. 💥 Why does this happen? Because JavaScript closures capture values at the time of render—not the latest state. ✅ Fix #1: Add dependency (simple, but not always ideal) useEffect(() => { const id = setInterval(() => { console.log(count); }, 1000); return () => clearInterval(id); }, [count]); ✅ Fix #2 (better for production): useRef const countRef = useRef(count); useEffect(() => { countRef.current = count; }, [count]); useEffect(() => { const id = setInterval(() => { console.log(countRef.current); // ✅ Always latest value }, 1000); return () => clearInterval(id); }, []); 💡 You’ll often see this in: • setInterval / setTimeout • WebSockets • Event listeners • Background tasks 👉 Have you ever faced this issue? 👉 How did you solve it? Let’s discuss 👇 I’m currently exploring new opportunities in React Native — would love to connect! #ReactNative #JavaScript #Frontend #BugFix #OpenToWork

React still dominates the frontend job market in 2025. And the numbers don't lie. This isn't just developer hype. It's where the opportunities actually are. DevJobsScanner analyzed over 250K job postings from trusted sites in 2024. If you're deciding which framework to learn next, this data should guide you. Here's how the demand breaks down: → React leads with 126K job openings → Angular follows at 87K positions → Vue holds steady with 24K opportunities → Your location plays a bigger role than you'd expect Why geography matters more than you think: ↳ France, Switzerland, Italy, Spain, and Ireland favor Angular ↳ Belgium offers more Vue jobs than any other framework ↳ Nearly everywhere else leans heavily into React ✦ The "best" framework depends on where you want to work. So before you dive into tutorials, check your local job market first. Which framework are you most experienced with? Drop it in the comments. Follow for more web development insights. ♻️ Repost to help a fellow dev make a smarter choice. #WebDevelopment #ReactJS #Angular #VueJS #FrontendDevelopment #TechJobs #JavaScript

💡 One lesson I learned as a Frontend Developer: Writing code that works is only step one. Writing code that is reusable, clean, and scalable is what creates real value. Recently, while working on React projects, I realized small improvements like: ✅ Reusable components ✅ Cleaner state management ✅ Better folder structure ✅ Performance optimization ✅ User-friendly UI These changes save hours of future work and improve product quality. Still learning every day, one project at a time. #FrontendDeveloper #ReactJS #JavaScript #WebDevelopment #SoftwareEngineer #Learning #OpenToWork

In frontend development, one mistake I used to make (and I still see often) is over-optimizing React applications. We tend to use React.memo, useMemo, and useCallback everywhere, assuming it will improve performance. But in reality, unnecessary memoization can actually make the code more complex without real benefits. What I’ve learned through experience: Optimization should be driven by actual performance issues — not assumptions. Now my approach is simple: First measure → identify the bottleneck → then optimize only where it matters. This shift in thinking helped me write cleaner and more maintainable code. Currently exploring new opportunities where I can apply and grow these practical learnings. Would be interested to know — how do you decide when to optimize in your projects? #FrontendDevelopment #ReactJS #OpenToWork

Ever wondered what really happens under the hood when a React app runs? 🤔 At first, React feels like magic — you update state, and the UI just changes. But there’s a lot going on behind the scenes 👇 🔹 Virtual DOM It is a javascript object tree representing the UI 🔹 Reconciliation (Diffing Algorithm) When state or props change, React compares the previous Virtual DOM with the new one and figures out the minimum updates needed. 🔹 Efficient DOM Updates Instead of re-rendering everything, React updates only the parts that actually changed — making apps faster 🚀 🔹 Component-Based Architecture Everything is a component. Each component manages its own state, making code reusable and easier to maintain. 🔹 One-Way Data Flow Data flows from parent → child, which keeps things predictable and easier to debug. 🔹 Hooks & State Management With hooks like useState and useEffect, React tracks state changes and triggers re-renders when needed. 💡 The real power of React isn’t just rendering UI — it’s how efficiently it decides what NOT to update. Currently exploring frontend (reactjs) opportunities and open to work 👩💻 If you're hiring or know someone who is, feel free to connect! #ReactJS #FrontendDeveloper #OpenToWork #JavaScript #WebDevelopment #MERNStack

Nobody talks about this shift in web development. 2 years ago, a web developer needed: → HTML, CSS, JavaScript → Maybe a framework like React Today, the same job expects: → TypeScript (not just JS) → Next.js or similar meta-framework → Tailwind CSS for styling → REST & GraphQL API knowledge → Git, CI/CD basics → And now — AI-assisted coding too The job title stayed the same. The skill set doubled. This is why junior devs are struggling to get hired — they learned the old list, not the new one. Are you keeping your skills updated? 👇 #webdeveloper #AiDeveloper #Aimarket

Recently, I interviewed for multiple Senior React.js & Tech Lead roles — and noticed a pattern. Most interviewers asked basic but frequently repeated questions that test your clarity of concepts + coding approach. Here are the Top 10 common questions I was asked 👇 1️⃣ Call, Apply, Bind → Difference + Polyfill implementation 2️⃣ Flatten an Array without Array.flat() 👉 Input: [1,2,3,[4,5,6,[7,8,[10,11]]],9] 👉 Output: [1,2,3,4,5,6,7,8,10,11,9] 3️⃣ Inline 5 divs in a row without flex/margin/padding (Hint: display: inline-block) 4️⃣ Find sum of numbers without a for loop (Hint: reduce() / recursion) 5️⃣ Deep Copy vs Shallow Copy — behavior & how to achieve it 6️⃣ Promise & Async/Await output puzzle 7️⃣ Find first repeating character (e.g., "success" → "c") 8️⃣ Stopwatch Implementation (Start, Stop, Reset + live timer) 9️⃣ Build a To-Do List (Vanilla JS/React) → optimize re-renders 🔟 Currying for Infinite Sum 👉 sum(10)(20)(30)() → 60 👉 sum(10)(20)(30)(40)(50)(60)() → 210 𝐠𝐞𝐭 𝐞𝐛𝐨𝐨𝐤 𝐰𝐢𝐭𝐡 (detailed 232 ques = 90+ frequently asked Javascript interview questions and answers, 70+ Reactjs Frequent Ques & Answers, 50+ Output based ques & ans, 23+ Coding Questions & ans, 2 Machine coding ques & ans) 𝐄𝐛𝐨𝐨𝐤 𝐋𝐢𝐧𝐤: https://lnkd.in/gJMmH-PF Follow on Instagram : https://lnkd.in/gXTrcaKP #javascript #javascriptdeveloper #reactjs #reactnative #vuejsdeveloper #angular #angulardeveloper