React Code Smell: Memoize Wisely

JavaScript Brain Teaser: The this Trap... Looks simple… but there’s a catch hiding in plain sight const obj = { name: "Deepak", first: function () { console.log("First:", this.name); }, second: () => { console.log("Second:", this.name); } }; obj.first(); obj.second(); Drop your answers in the comments Let’s see who truly understands what’s happening under the hood #JavaScript #CodingChallenge #Frontend #InterviewPrep #WebDevelopment

useMemo vs useCallback – Simple Real Example Many developers confuse these two hooks. 👉 useMemo Used to memoize a value. Example: When filtering a large dataset to prevent recalculation on every render. 👉 useCallback Used to memoize a function. Example: Passing callback functions to child components to prevent unnecessary re-renders. Rule I follow: If you're returning a function → useCallback If you're returning a computed value → useMemo Clean optimization improves scalability. #ReactJS #JavaScript #FrontendDevelopment

🚀 💡 JavaScript Tricky Question Explanation const arr = [4, 10, 2, 8]; const result = arr.find(num => num > 5) + arr.findIndex(num => num > 5); console.log(result); 👉 Output: 11 👉 Explanation: * find() returns the first value > 5 → `10` * findIndex() returns its index → `1` * Final result → `10 + 1 = 11` ⚡ Both stop at the **first match** #JavaScript #WebDevelopment #Frontend #CodingInterview #JSConcepts

🚀 Day 30 - 💡 JavaScript Tricky Question Explanation const arr = [4, 10, 2, 8]; const result = arr.find(num => num > 5) + arr.findIndex(num => num > 5); console.log(result); 👉 Output: 11 👉 Explanation: * find() returns the first value > 5 → `10` * findIndex() returns its index → `1` * Final result → `10 + 1 = 11` ⚡ Both stop at the **first match** #JavaScript #WebDevelopment #Frontend #CodingInterview #JSConcepts

Day 84 / 365 👨💻 Revisited key concepts around React state management. 🧠 Understanding how useState drives UI updates ⚙️ Breaking down re-render behavior ⏳ Handling async nature of state updates 🧩 Working with multiple states (arrays/objects) ⚠️ Applying Rules of Hooks correctly #365DaysOfCode #React #JavaScript #Frontend

💡 JavaScript Tip: Stop writing defensive code the hard way. Before optional chaining (?.), we used to write: const city = user && user.address && user.address.city; Now, it's as clean as: const city = user?.address?.city; If any part of the chain is null or undefined, it simply returns undefined — no errors, no verbose conditions. This is especially powerful when working with API responses where nested data isn't always guaranteed. Small syntax. Big impact on readability and reliability. ♻️ Repost if this helped someone on your network. #JavaScript #WebDevelopment #CleanCode #Frontend #CodingTips

Most frontend bugs are not about state. They're about async. - race conditions - stale data - inconsistent loading/error We've been treating async as a side effect. I've been experimenting with a different approach: → making async part of a reactive runtime I built a small prototype: @signal-kernel/async-runtime It automatically handles: - cancellation - last-write-wins - consistent async state No hooks. No manual control. Still exploring this direction, but curious what others think. #react #javascript #signals #frontend #webdevs #typescript #library Npm Link is here👇 https://lnkd.in/gN7BC3Vt

Custom hooks help you extract reusable logic, keep your components clean, and simplify state management. They’re perfect for making your React code more organized and maintainable. Benefits: Reuse logic across components Avoid repetition Simplify complex logic Improve consistency 💡 Pro Tip: Start with small hooks for common patterns—it saves time and makes your projects scalable! #ReactJS #CustomHooks #WebDevelopment #Frontend #JavaScript #CleanCode

Built a small Dynamic List Creator using JavaScript DOM. Users can add, edit, and delete items. Simple project, but helped me understand how to create and manage elements dynamically. Learning with Chai Aur Code cohort ☕ #JavaScript #DOM #WebDev #Frontend #ChaiCode

💡 JavaScript Tricky Question let a = 'hello'; a[0] = 'H'; console.log(a); 👉 Output: `hello` ✅ Explanation: Strings in JavaScript are **immutable** (cannot be changed). Even though it looks like we’re modifying `a[0]`, JavaScript ignores it. So the original string stays the same. 🔹 To change it, you must create a new string: a = 'H' + a.slice(1); #JavaScript #WebDevelopment #Frontend #Coding #JSConcepts