Joshua Olagunju’s Post

My Top 10 VS Code Extensions for Boosting Productivity 💻 As a Frontend Developer, I spend most of my time inside VS Code and having the right extensions makes a huge difference in speed, code quality, and overall workflow. Here are my Top 10 Productivity Extensions that I personally use and highly recommend → Live Server – Instantly preview your projects in the browser. → ESLint – Keeps your code clean and consistent. → GitLens – Supercharges Git right inside VS Code. → Better Comments – Write more meaningful, color-coded comments. → Prettier – Automatically format your code for perfect readability. → GitHub Copilot – Your AI pair programmer → Auto Rename Tag – Rename paired HTML tags automatically. → Path Intellisense – Autocomplete file paths quickly and accurately. → Qodo Gen – Generate boilerplate code faster than ever. → Night Owl Theme – A beautiful dark theme for night coding These extensions have significantly improved my development workflow — from writing cleaner code to saving hours of manual work. If you found this helpful, save this post and try adding a few of these to your setup! -- Tahfeez Mizan #FrontendDevelopment #VSCode #Productivity #SoftwareDevelopment #WebDevelopment #CodingTools #TypeScript #DeveloperLife #JavaScript #SoftwareEngineer #ReactJS #NextJS #Productivity #DevTools #CodeEditor #DeveloperProductivity #AutomationTools #CodingSetup #ProgrammingWorkflow #TechStack #DeveloperExperience

🚀 I got a code review comment saying: “Use useCallback here.” And that one line made me dive deep into how useCallback actually works 👇 Everyone knows what useCallback does — But very few understand when to use it (and when NOT to). At first, I used it everywhere thinking it automatically improves performance. But here’s what I found after digging deeper 👇 💡 useCallback can actually hurt performance if used carelessly. When you wrap a function in useCallback, React has to store and compare that memoized function between renders. If that function isn’t passed to a memoized child (like one using React.memo), you’re just adding extra overhead for no real gain. So now, before adding useCallback, I ask myself: ✅ Is this function passed as a prop to a memoized child? ✅ Will it actually prevent unnecessary re-renders? If not — I skip it. Sometimes, a normal inline function is faster. 🧠 Takeaway: useCallback doesn’t make your code performant by default. Use it intelligently, not habitually. 📘 React Docs: https://lnkd.in/du83sdXj #React #Performance #JavaScript #FullStackDeveloper #ReactTips #WebDevelopment #LearningEveryday

🧠 Ever wondered how JavaScript remembers things? Here’s a fun little secret — it’s called a Closure! Closures let functions “remember” variables from their outer scope, even after that outer function has stopped running. Think of it like your favorite barista who remembers your coffee order — even though the shift changed ☕😉 Each time you call it, it still remembers where it left off — that’s closure magic ✨ 💡 Why it matters: Keeps your data private 🔒 Makes your code clean and modular 🧩 Helps you write smarter, reusable functions 🚀 Have you ever used closures creatively in your projects? 👇 Drop your “aha!” moment or favorite use case in the comments! #JavaScript #CodingTips #WebDevelopment #Closures #Frontend #TechLearning

🚀 Back to Basics – Day 13: Async/Await Like a Pro ⚙️ Yesterday, we explored real-world async patterns — chaining, parallelism, and error handling with Promises. Today, let’s take it up a notch and learn how to use Async/Await effectively in production-grade code. 💪 ✨ Why This Matters Async/Await makes async code readable — but using it wrong can still block, leak, or miss errors. Let’s fix that. 👇 ⚡ 1️⃣ Async in Loops — The Right Way ❌ Common mistake: for (let id of ids) { await fetch(`/user/${id}`); } This runs sequentially — one after another. 😩 ✅ Better: await Promise.all(ids.map(id => fetch(`/user/${id}`))); Now all requests run in parallel, saving time ⏱️ ⚡ 2️⃣ Handling Errors Gracefully Use try/catch for predictable error handling — but don’t stop your whole flow. for (let id of ids) { try { const res = await fetch(`/user/${id}`); } catch (err) { console.error('Failed:', id, err); } } Each iteration continues independently 🚀 ⚡ 3️⃣ Timeouts & Cancellation Ever had an API hang forever? Combine Promise.race() for timeouts ⏳ await Promise.race([ fetch('/data'), new Promise((_, reject) => setTimeout(() => reject('Timeout!'), 3000)) ]); 💡 Takeaway Async/Await isn’t just about cleaner syntax — it’s about control. When you combine patterns like parallelism, safe error handling, and timeouts, your async code becomes bulletproof 🔒 👉 Tomorrow – Day 14: We’ll wrap up our async journey with how JS handles concurrency under the hood — the event loop in action with Promises, microtasks, and rendering. ⚙️ #BackToBasics #JavaScript #AsyncAwait #Frontend #WebDevelopment #Promises #CodingJourney #LearningInPublic #AdvancedJavaScript

Why Clean Code Isn’t Always Fast Code We all love clean, modular React code, it’s easy to read, test, and maintain. But sometimes, that same “clean” structure quietly slows your app down. Here’s what I’ve learned over time 🔹 Too many abstractions = too many renders Breaking every small piece into its own component sounds ideal, but each component adds rendering overhead. Sometimes a few well-placed inline conditions perform better. 🔹 Hooks can hide performance issues A neat useCustomHook may look elegant, but if it recalculates heavy logic on every render, that abstraction hurts more than it helps. 🔹 Context isn’t free Global context updates can trigger re-renders across the tree. Sometimes prop drilling or selective memoization is the faster choice. 🔹 Clean != Optimal Readable patterns like .map() or .filter() chains look great but can be replaced with a single efficient loop when performance really matters. The key insight: Clean code is about humans reading it. Fast code is about machines executing it. #React #frontend #Web #code #Javascript #WebDev #interview

💡 𝐖𝐡𝐲 𝐈’𝐦 𝐂𝐫𝐞𝐚𝐭𝐢𝐧𝐠 𝐌𝐲 𝐎𝐰𝐧 𝐍𝐏𝐌 𝐏𝐚𝐜𝐤𝐚𝐠𝐞⁣ ⁣ As developers, we often repeat the same code in multiple projects.⁣ Validation functions, date formatters, helpers — the same logic, written again and again.⁣ ⁣ It works... but it’s not efficient.⁣ ⁣ So, I decided to create my own NPM package —⁣ a reusable library that keeps all my custom functions in one place.⁣ ⁣ 𝐍𝐨𝐰, 𝐰𝐡𝐞𝐧𝐞𝐯𝐞𝐫 𝐈 𝐬𝐭𝐚𝐫𝐭 𝐚 𝐧𝐞𝐰 𝐩𝐫𝐨𝐣𝐞𝐜𝐭,⁣ ⁣ I simply run 👇⁣ ⁣ 𝘯𝘱𝘮 𝘪𝘯𝘴𝘵𝘢𝘭𝘭 𝘮𝘺-𝘶𝘵𝘪𝘭𝘴⁣ ⁣ ⁣ and everything I need is ready to go.⁣ ⁣ No more hunting old code.⁣ No more copy-paste chaos.⁣ Just clean, consistent, and reusable code. ⚡⁣ ⁣ 🚀 𝐖𝐡𝐚𝐭 𝐈’𝐯𝐞 𝐥𝐞𝐚𝐫𝐧𝐞𝐝⁣ Repetition slows you down⁣ Reusability scales you up⁣ Small optimizations lead to big productivity⁣ ⁣ And this doesn’t just apply to code —⁣ it’s how smart systems and businesses grow too.⁣ Automate what repeats.⁣ Optimize what slows you down.⁣ ⁣ 👨💻 Have you ever built your own package or wanted to?⁣ What would you include in it?⁣ ⁣ #WebDevelopment #JavaScript #NPM #SoftwareEngineering #CodingTips #TechSimplified #Productivity #AliHaider #Angular #RxJS #JavaScript #WebDevelopment #Frontend #AsyncProgramming #Angular #WebDevelopment #Frontend #JavaScript #Coding #SoftwareEngineering #Learning #TechCommunity

Every developer starts somewhere — and sometimes, it begins with a small project like this. In this week’s Code Challenge, we’re building a Dark Mode Toggle using only HTML, CSS, and JavaScript. No frameworks. No shortcuts. Just hands-on coding that builds real skills. You’ll learn how to: 🔸 Connect your web files properly 🔸 Make your site interactive with event listeners 🔸 Switch between themes dynamically 🔸 Design your own custom light and dark modes If you’re transitioning into tech, challenges like this help you think like a developer — not just follow a tutorial. ▶️ Watch Make Your Website Dark Mode Toggle on our Youtube Channel: https://lnkd.in/gqH8Yyys 👉 Start your journey: https://lnkd.in/gqumMgu6 #CodeClassroom #CareerSwitch #LearnToCode #FrontendDevelopment #CodingChallenge

Understanding 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 scoping changed 𝗲𝘃𝗲𝗿𝘆𝘁𝗵𝗶𝗻𝗴 for me today. Here’s what really clicked and why my code just got a whole lot cleaner 👇 𝟭. 𝗦𝗰𝗼𝗽𝗲 𝗱𝗲𝗰𝗶𝗱𝗲𝘀 𝗲𝘃𝗲𝗿𝘆𝘁𝗵𝗶𝗻𝗴   `var` is 𝗳𝘂𝗻𝗰𝘁𝗶𝗼𝗻-𝘀𝗰𝗼𝗽𝗲𝗱 (or global), while `let` and `const` are 𝗯𝗹𝗼𝗰𝗸-𝘀𝗰𝗼𝗽𝗲𝗱.   Translation? Your variables finally stay where they belong. No accidental leaks. No silent chaos. 𝟮. 𝗛𝗼𝗶𝘀𝘁𝗶𝗻𝗴: 𝘁𝗵𝗲 𝘀𝗻𝗲𝗮𝗸𝘆 𝗽𝗮𝗿𝘁   `var` gets hoisted and initialized with `undefined`. So yes, you can “use” it before declaring but you probably shouldn’t.   `let` and `const` are hoisted too but not initialized. Try touching them early? You’ll meet the 𝗧𝗲𝗺𝗽𝗼𝗿𝗮𝗹 𝗗𝗲𝗮𝗱 𝗭𝗼𝗻𝗲.   Painful lesson → but a safety net for cleaner code. 𝟯. 𝗥𝗲𝗱𝗲𝗰𝗹𝗮𝗿𝗮𝘁𝗶𝗼𝗻 & 𝗿𝗲𝗮𝘀𝘀𝗶𝗴𝗻𝗺𝗲𝗻𝘁: 𝗰𝗵𝗼𝗼𝘀𝗲 𝘆𝗼𝘂𝗿 𝗳𝗶𝗴𝗵𝘁𝗲𝗿 → `var`: Can redeclare and reassign (freely... and dangerously). → `let`: Can reassign, not redeclare. → `const`: Neither. Once set, always set. Perfect for fixed values or configs. 𝟰. 𝗪𝗵𝘆 𝗺𝗼𝗱𝗲𝗿𝗻 𝗝𝗦 𝗹𝗼𝘃𝗲𝘀 `𝗹𝗲𝘁` 𝗮𝗻𝗱 `𝗰𝗼𝗻𝘀𝘁` → They make bugs easier to catch. → They make code easier to reason about. → And `const` tells your future self: “This value isn’t changing. Don’t even try.” 𝟱. 𝗧𝗵𝗲 𝗺𝗶𝗻𝗱𝘀𝗲𝘁 𝘀𝗵𝗶𝗳𝘁   Stop writing for “it works.”   Start writing for predictability, readability, and intent. That’s how I see it now → the difference between writing code and writing reliable code. Anyhow, my JavaScript journey just got a clarity upgrade. Next stop → mastering closures. P.S. What’s one JS concept that finally made sense to you after struggling with it? #frontend #webdevelopment #scss #html #javascript #developer #cohort2 #learningjourney

When everything else fails in 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁… Try going back to the basics 👇 I spent today revising some core concepts and honestly, it reminded me how small fundamentals make big differences in coding: 𝟭. 𝗢𝗽𝗲𝗿𝗮𝘁𝗼𝗿𝘀 𝗮𝗿𝗲𝗻’𝘁 𝗷𝘂𝘀𝘁 𝘀𝘆𝗺𝗯𝗼𝗹𝘀. They decide how your code thinks and reacts from arithmetic (+, -, %) to logical (&&, ||). 𝟮. 𝗛𝗼𝗶𝘀𝘁𝗶𝗻𝗴 𝗶𝘀𝗻’𝘁 𝗺𝗮𝗴𝗶𝗰, 𝗶𝘁’𝘀 𝗼𝗿𝗱𝗲𝗿. var gets hoisted (declared but undefined), let and const are hoisted too but live in a “temporal dead zone.” 𝟯. 𝗙𝘂𝗻𝗰𝘁𝗶𝗼𝗻𝘀 𝗹𝗼𝘃𝗲 𝘁𝗵𝗲 𝘀𝗽𝗼𝘁𝗹𝗶𝗴𝗵𝘁. Declarations are hoisted fully. Expressions? Not so much & they wait for their turn! It’s wild how a simple console.log() before a variable can teach you why order matters in JavaScript. Besides... When did debugging become about guessing? 😄 It’s really about understanding how JavaScript reads your code line by line. 𝗣.𝗦. Which JavaScript concept confused you most when you started? #Frontend #Webdevelopment #Javascript #Developer #Cohort2 #Learningjourney #Fundamental

✨Day 6/28 Consistency Challenge ✨ 🚀 Today’s Lesson: Escaping Callback Hell in JavaScript! **Ever found yourself nesting callbacks inside callbacks… until your code starts looking like a staircase to chaos? **Yeah, that’s callback hell — where your code becomes so deeply nested it’s hard to read, debug, or maintain. 💡 What I learned today: Callback hell happens when multiple async functions depend on each other, and everything’s chained inside one another. Callback nesting -> Callback hell. ✅ How to prevent it: ✍️Use Promises to flatten the chain ✍️Switch to async/await for cleaner, more readable code ✍️Keep functions modular and avoid deeply nested logic ✨ Lesson of the day: Clean code isn’t just about making it work — it’s about making it make sense. #JavaScript #CodingJourney #Webdevelopment #EverydayLearning