Ebener Santos’ Post

JavaScript isn’t truly “multithreaded”… it just fakes it brilliantly. The Event Loop is the brain behind that illusion. Here’s the real game happening under the hood: • Call Stack → Executes synchronous code first • Microtask Queue → Promises, queueMicrotask, process.nextTick() • Macrotask Queue → setTimeout, setInterval, I/O, UI events The rule most devs miss: Microtasks always run before Macrotasks. Which leads to something interesting called Starvation. If microtasks keep getting added endlessly (like chained Promises), the event loop keeps prioritizing them… and macrotasks like setTimeout might wait longer than expected. So the order looks like this: Sync Code → Microtasks → Macrotask → repeat. Understanding this isn’t just theory. It explains why your async code sometimes behaves like it’s possessed. JavaScript looks simple on the surface. Underneath, it’s a tiny scheduler juggling tasks like a caffeinated circus performer. #javascript #webdevelopment #frontend #reactjs #nodejs #coding #programming #eventloop #asyncjavascript #developers

Regular vs Arrow Functions: The Ultimate Showdown ⚔️.......................................... In JavaScript, regular functions and arrow functions may look alike, but their behavior is fundamentally different. Regular functions have dynamic this binding, can be used as constructors with new, and come with their own arguments object. Arrow functions, by contrast, lexically inherit this from their surrounding scope, cannot be used as constructors, and have no arguments object. Use regular functions for object methods and when you need dynamic context; opt for arrow functions in callbacks and to preserve this. Understanding these distinctions is key to writing cleaner, bug-free code! #javascript #webdev #coding #programming #functions #arrowfunctions #js #frontend #backend #developer #tech #webdevelopment

🚀 Simplifying JavaScript Promises! Understanding asynchronous operations can be tricky, but Promises make it easier to handle tasks like API calls, error handling, and chaining multiple operations. This infographic breaks it down step by step, from creating a Promise to handling results and chaining them. Perfect for developers looking to strengthen their JS fundamentals! 💻✨ #JavaScript #WebDevelopment #Coding #Programming #LearnToCode #FrontendDevelopment #AsyncProgramming #Promises #API #TechTips #Developers #SoftwareEngineering #CodeNewbie #JS

Closures Part 3 ........................................ Closures vs Prototype Inheritance: Are They Related? No, closures and prototype inheritance are completely separate and independent mechanisms in JavaScript. They serve different purposes, operate at different levels, and have no direct relationship. 💬 Share your answer or reasoning in the comments. #JavaScript #InterviewPreparation #SoftwareEngineering #WebDevelopment #DevelopersOfLinkedIn #frontend #backend #coding #learning

JavaScript vs. TypeScript: Which one to choose? JavaScript offers flexibility and speed for small projects and rapid prototyping, perfect for beginners and quick web interactions. TypeScript, a superset of JavaScript, brings static typing for enhanced code quality, better maintainability, and fewer bugs, making it ideal for large-scale, team-based applications. Your choice depends on project size, team collaboration, and desired code reliability! #JavaScript #TypeScript #JSvsTS #WebDevelopment #Programming #Coding #Frontend #Backend #SoftwareDevelopment #TechComparison #DynamicTyping #StaticTyping #DeveloperLife #CodeQuality #Scalability #TechExplained #ProgrammingLanguages #DevCommunity #LearnToCode #FutureOfWeb

Why it is recommended that "let" is used in for loops instead of "var" while output is same in both cases ? .......................... Because 1. Scope difference (main reason) var → function scoped let → block scoped With var, the variable exists outside the loop block. 2. Major difference with async code This is where let becomes very important. Using var 3. Prevents accidental bugs With var ✅ Rule used in modern JavaScript Use let for variables that change Use const for variables that don't change Avoid var in modern code #webdevelopment #webdev #webdeveloper #frontend #frontenddeveloper #backend #backenddeveloper #fullstack #fullstackdeveloper #coding #programming #javascript #html #css #reactjs #nodejs #webdesign #softwaredeveloper #tech #devlife

🚀 React Class Components vs Function Components React has evolved — and so has the way we build components. 🔷 Class Components ✅ Lifecycle methods (componentDidMount, etc.) ✅ Structured, traditional approach ⚠️ More boilerplate ⚠️ Harder to reuse logic 🟢 Function Components ✅ Hooks (useState, useEffect) ✅ Cleaner & more readable code ✅ Easier state and side-effect management ✅ Highly reusable logic 💡 Modern React development favors function components, but understanding both is essential for working with real-world codebases. Which one did you learn first — classes or hooks? #React #WebDevelopment #Frontend #JavaScript #Programming #SoftwareEngineering #UI #Development

JavaScript isn’t evolving through hype anymore. It’s evolving through small, practical upgrades that quietly make your code cleaner, safer, and easier to reason about. From Object.hasOwn() and private class fields to toSorted() and Object.groupBy() to Promise.withResolvers() and Iterator Helpers… Modern JS is pushing toward: • Less mutation • Clearer intent • Safer async handling • More functional data processing And honestly? That’s the kind of evolution that makes senior engineers dangerous. Before you search for a solution, you first need to know it exists. Which of the modern features are you already using in production? #JavaScript #WebDevelopment #Frontend #NodeJS #ECMAScript #SoftwareEngineering #CleanCode #Programming #FullStack #DevCommunity

Simple code but yet explain the deep Js concept........................... Most people confidently say that the function overrides the variable. And tbh it's not even completely wrong. There's a little more to it though. You actually get a "TypeError" saying "a is not a function". That's because JavaScript runs in two phases, creation and execution. During the creation phase, function declarations are hoisted before var declarations. So initially, a points to the function. But once execution starts, this line runs: var a = 10; That assignment overwrites the function reference. So by the time we reach a(), we’re essentially doing 10(); And that's when it breaks. #JavaScript #JS #FrontendDevelopment #WebDevelopment #Programming #Coding #TechInterview #InterviewPreparation