Understanding Keyboard Events in JavaScript

The next generation of frontend performance won’t be written in JavaScript, it’ll run beside it. WebAssembly with Rust means faster and safer web. Are you experimenting with Wasm yet? #WebDevelopment #Rust #Wasm #Coding

Ever felt lost in the complexities of the Node.js EVENT LOOP? 🤔 Let's demystify this core concept for better JavaScript performance! The Node.js Event Loop (powered by V8 and libUV) is the HEARTBEAT ❤️ of asynchronous JavaScript. Understanding it is CRUCIAL for writing efficient Node.js applications. Here are three key takeaways: 💡 Grasp the difference between BLOCKING and NON-BLOCKING I/O. Blocking I/O halts the entire process, non-blocking doesn't. ⏱️ Understand the nuances of `setImmediate` vs. `setTimeout(0)`. While seemingly similar, they behave differently in the event loop's execution order. `setImmediate` prioritizes I/O cycle, while `setTimeout(0)` goes to the timer queue. 🧵 Optimize your UV_THREADPOOL_SIZE. This determines the number of threads available for asynchronous operations. Increasing it can boost performance for CPU-intensive tasks. What's YOUR favorite Node.js performance tip? Share in the comments! 👇 #Nodejs #JavaScript #EventLoop #Asynchronous #Programming #Backend #Performance

Recently I was preparing for JavaScript and I stumbled upon a simple concept — but most people don’t know the key differences between var and let. Here’s a quick example: ` for (var i = 0; i < 3; i++) {  setTimeout(() => console.log(i), 1000); } // Output: 3 3 3 ` ` for (let i = 0; i < 3; i++) {  setTimeout(() => console.log(i), 1000); } // Output: 0 1 2 ` Key differences: Scope: var is function-scoped, let is block-scoped. Hoisting & Temporal Dead Zone: var is hoisted and initialized with undefined, let is hoisted but not initialized — accessing it before declaration throws a ReferenceError. Understanding these small details can save you from tricky bugs, especially in loops and async code! #JavaScript #JS #WebDevelopment #FrontendDevelopment #Coding #LearnToCode #DeveloperTips #TechCommunity #CodeSnippet #Programming ## I’d appreciate it if you could share a few more examples to help me understand.

Learning by building: wrote a simple JS program that takes a number and prints its multiplication table with clean loops, input validation, and readable template strings. Small steps, consistent commits, better logic every day. 🚀 #JavaScript #VSCode #100DaysOfCode #BuildInPublic”

Coming from a C++ background, I was used to working with a true multithreaded language, whre multiple functions could wrestle for CPU time. Then I hit JavaScript… and realized it’s single-threaded. Only one function can actually run at a time. which changed how i approach problems. I was working on a small project — basically just making a div move randomly across the screen. Sounds simple, right? But when you give it independent X and Y targets, things get chaotic fast. The movement looks alive, unpredictable, like it’s thinking. That’s when I learned about requestAnimationFrame(). At first, I thought it just “runs things continuously.” Nope. It schedules them — about 60 times a second. You’re not looping; you’re politely asking the browser to let your code run again at the next frame and if you don’t structure it right, like putting requestAnimationFrame() inside your function but not calling it again outside, your function just fires once and quits. Feels small, but understanding this changed how I think about JavaScript, not as a slower , but as a completely different beast that plays by its own rules. #javascript #frontend

🚀 JavaScript Tip of the Day – Find Duplicate Values in an Array Efficiently! Today I worked on a simple but powerful logic to detect duplicate elements in an array using ES6 Sets. This approach is clean, fast, and avoids unnecessary loops. 🔍 What this does: Tracks seen values Captures duplicates only once Converts the result back to an array ✨ Output: [2, 3] Small logic, big impact! #JavaScript #Coding #WebDevelopment #100DaysOfCode #LearnEveryday

In JavaScript, everything revolves around prototypes — the hidden blueprint that allows objects to inherit properties and methods from one another. 🧩 Every object (like Car, Date, or Dog) inherits from a prototype object, which links up the chain to Object.prototype. 💡 Functions and arrays also use prototypes to share methods like map(), filter(), or toString() without duplicating them. 🌐 This structure forms the foundation of JavaScript’s inheritance system, making the language flexible and powerful. 👉 Think of the prototype as a “shared toolbox” — every object has access to the same tools through its prototype chain. #JavaScript #WebDevelopment #Frontend #Coding #Programming #TechLearning #HTML #Object #Function

React Hooks Deep Dive: The Complete Guide (PDF Attached) Following up on my previous post about useMemo and useCallback, I've expanded it into a comprehensive guide covering all 11 essential React Hooks. What's Inside: - useState & useEffect fundamentals - useContext for cleaner state access - useRef for DOM manipulation & persistence - useMemo & useCallback (expanded from last post) - useReducer for complex state logic - useLayoutEffect for synchronous updates - Modern hooks: useId, useDeferredValue, useTransition #React #WebDevelopment #JavaScript #Frontend #ReactHooks #Programming #SoftwareEngineering #WebDev #TypeScript #Development

I’ve been exploring how JavaScript actually works under the hood. The MDN guide on the JavaScript execution model is an eye‑opener, especially when it comes to the event loop, the engine that makes async code feel synchronous. The browser JS runtime is built around a single thread that handles UI rendering, network I/O, and timers. The event loop cycles through macrotasks (e.g., setTimeout, I/O callbacks) and microtasks (e.g., Promises, MutationObserver). I feel like there is a lot of insight here to be had by going down this particular rabbit-hole. https://lnkd.in/gbzdTUYe #JavaScript #WebDevelopment #AsyncProgramming

1. JavaScript itself runs your code line-by-line. 2. The browser’s Web APIs handle anything async (like timers, fetches, events). 3. When those async tasks complete, the event loop brings their callbacks back to JavaScript for execution. #JavaScript #WebDevelopment #Programming #LearnToCode #DeveloperCommunity #FrontendDevelopment