JavaScript Fundamentals Remain Essential

⏳ “JavaScript is single-threaded.” I used to hear this everywhere. But then I had one question: If JavaScript is single-threaded… How does async code work? That’s when I learned about the Event Loop. Here’s the simple idea 👇 🧠 JavaScript has: • Call Stack • Web APIs • Callback Queue • Event Loop When async code runs (like setTimeout or fetch): 1️⃣ It moves to Web APIs 2️⃣ Once completed, it goes to the Callback Queue 3️⃣ The Event Loop checks if the call stack is empty 4️⃣ Then pushes it back to execute That’s why: console.log(1) setTimeout(() => console.log(2), 0) console.log(3) Output is: 1 3 2 Understanding this made debugging async bugs much easier. Frameworks don’t hide this. They rely on it. #JavaScript #EventLoop #WebDevelopment #FrontendDeveloper #NodeJS #SheryiansCodingSchool

I’m currently revisiting JavaScript fundamentals, starting with arrays and objects. Coming back to these basics is reminding me why foundations matter so much in frontend development. • Arrays are great for storing lists of values. • Objects are better for grouping related data using key–value pairs. This time around, the concepts feel clearer because I’m learning with more intention. I’ll be sharing insights from my frontend journey as I continue to relearn and build 🚀 #FrontendDevelopment #JavaScript #LearningInPublic #WebDevelopment

Understanding the Node.js event loop finally made async JavaScript click for me. Here’s a simple example that confused me earlier: console.log("Start"); setTimeout(() => console.log("Timeout"), 0); Promise.resolve().then(() => console.log("Promise")); console.log("End"); Many beginners expect: Start → Timeout → Promise → End But the actual output is: Start → End → Promise → Timeout Why? Because Promises (microtasks) run before timer callbacks in the event loop. That one concept explains a lot of async behavior in Node.js. Once I understood this, debugging async issues became much easier. What JavaScript concept took you the longest to understand? #nodejs #javascript #backend #webdevelopment #softwareengineering

🚀 Fresh off the press! A new issue of Node Weekly is out, packed with insights for JavaScript developers. 📰 This week's edition dives into the State of JavaScript 2025 results, with Express still leading but Hono topping developer satisfaction. Plus, updates on Node.js 25.6.0, handy tools, and more. 💡 Why does it matter? Stay updated on the latest trends and tools to boost your productivity and stay ahead in the dynamic world of JavaScript. From framework popularity to security updates, this issue has you covered. ✅ Stay informed! #JavaScript #NodeJS #WebDevelopment #TechNews #DeveloperTools 📖 Full article: https://lnkd.in/gTidDrkP

JavaScript vs TypeScript — My Practical View 👇 After working with both in production, this is what I’ve learned: JavaScript gives speed. TypeScript gives safety. ⚡ JavaScript ✅ Fast to write ✅ Easy to start ✅ Flexible 🛡️ TypeScript ✅ Compile-time checks ✅ Better refactoring ✅ Fewer runtime bugs ✅ Strong IDE support In small projects, JavaScript is often enough. In large codebases, TypeScript saves months of debugging. From experience: TypeScript doesn’t slow development. It prevents slow maintenance. My rule: Prototype with JS. Scale with TS. What do you prefer in real projects — JS or TS? 👇 #JavaScript #TypeScript #ReactJS #ReactNative #SoftwareEngineering #TechLead

Most developers write React applications using modern JavaScript and JSX. But not every browser understands this syntax natively. That’s where Babel comes in. Babel transforms modern JavaScript into browser-compatible code — without forcing developers to change how they write their applications. What happens behind the scenes? • Babel parses the code into an Abstract Syntax Tree (AST) • It applies transformations using plugins and presets • It generates standard JavaScript that works across environments In React projects, Babel: ✔ Converts JSX into JavaScript ✔ Enables the automatic JSX runtime ✔ Adds smart polyfills only where required Understanding Babel isn’t just about tooling. It’s about building scalable, production-ready React applications that run reliably for every user — regardless of browser limitations. #React #JavaScript #Babel #WebDevelopment #Frontend #SoftwareEngineering #Programming #DeveloperTools #TechLearning #CleanCode

Today I learned about JSX in React. JSX stands for JavaScript XML. It lets us write HTML-like code inside JavaScript. For example: Instead of using createElement() manually, we can write code that looks like HTML — and React converts it behind the scenes. JSX makes UI code: * Cleaner * More readable * Easier to maintain It may look like HTML, but it’s actually JavaScript under the hood. Up Next: Understanding Components 👀 React Series – Day 2 🚀 #ReactJS #LearningInPublic #WebDevelopment #FrontendDeveloper

Many developers jump directly into React hooks, libraries, and frameworks. But the real foundation is much simpler 👇 ✅ Strong JavaScript fundamentals React is just JavaScript at its core. If you truly understand: • Closures • Scope & Hoisting • Async/Await & Promises • Array methods (map, filter, reduce) • ES6 concepts (arrow functions, destructuring, spread) Then React becomes easier, cleaner, and more powerful. Libraries can change. Frameworks can evolve. But strong JavaScript fundamentals stay forever. 💯 Before mastering React… master JavaScript. What’s your opinion? 👇 #ReactJS #JavaScript #FrontendDevelopment #WebDevelopment #CodingJourney

Day 7: Higher-Order Functions - Functions that take functions. Today I learned: - What higher-order functions are - Passing functions as parameters - Returning functions from functions - How callbacks work Small wins: - Struggled understanding concept initially → Realized functions are first-class citizens in JavaScript - Forgot to RETURN the result → Fixed it and code worked perfectly - Didn't see the practical use → Now understand it's foundation of map, filter, callbacks Built a function that takes 2 numbers and an operation function, then applies that operation. Key insight: This is where JavaScript's power comes from. Pass different functions, get different behaviors. Code: https://lnkd.in/gtT73HVR 143 days remaining. #JavaScript #BackendDeveloper #HigherOrderFunctions #Callbacks #100DaysOfCode #LearningJourney #NodeJS

🚀 Bun is changing the game for JavaScript developers! With unparalleled speeds, Bun v1.3.10 makes compilation and bundling feel like a breeze. Imagine running a server that processes 59,026 HTTP requests per second! That's not just fast; that's redefining productivity. What sets Bun apart? It's not just a runtime; it's a complete toolkit. Whether you want to incrementally adopt its features or dive into the entire stack, Bun has you covered. The compatibility with Node.js is a major win for teams looking to transition smoothly. Is your team ready to embrace Bun? What do you think about the future of JavaScript runtimes? #JavaScript #Bun #WebDevelopment