"Understanding JavaScript Event Loop with Examples"

🚀 New Project Alert — JavaScript Exception Handling! I’ve been exploring how to make JavaScript applications more robust and reliable, and I just published a hands-on project focused on Exception & Error Handling in JavaScript 🧠💻 🔍 This project covers: ✅ try...catch and finally blocks ✅ Custom error creation and throwing exceptions ✅ Best practices for handling asynchronous errors ✅ Writing cleaner, safer code with clear debugging messages You can check it out here 👇 🔗 GitHub Repository. https://lnkd.in/g3f223qc live demo : https://lnkd.in/g_KTj9PK 💬 Error handling is often overlooked, but it’s one of the key skills that separates good developers from great ones. Would love to hear how you approach exception handling in your JavaScript projects! #JavaScript #WebDevelopment #Coding #ErrorHandling #OpenSource

I ran this JavaScript snippet, and the output completely surprised me 😳. Day 10: How JavaScript actually handles a async operations ⚙️. 🧠 Logic: 🔹 JS execution always starts with synchronous code -> so "start", "First" & "end" log first. 🔹 Inside the loop, setTimeout is added to macrotask queue (it will run later). 🔹 Promise.then() is added to microtask queue (these will run right after sync code), cause of high priority then macrotask queue. 🔹 Inside asyncFn(), when execution hits await it pauses that function exec & waits for promise to get resolve. 🔹 In the mean time, event Loop continue with promise callback in microTask, one it's completed, the promise get resolved in asyncFn() & then it prints ("Second") to console. 🔹 And the last, the setTimeout callback in macroTask queue gets executed. So:  ✅ Promise run first (microTasks). ⏱️ SetTimeout run after (macroTasks). That's why promise 0, promise 1, promise 2, and Second appear before all TimeOut logs. #Javascript #InterviewPrep  #100DaysOfCode #CodingChallenge  #JavaScript #CodingInterview #JSChallenges

🚀 JavaScript Core Concept: Hoisting Explained Ever wondered why you can call a variable before it’s declared in JavaScript? 🤔 That’s because of Hoisting — one of JavaScript’s most important (and often misunderstood) concepts. When your code runs, JavaScript moves all variable and function declarations to the top of their scope before execution. 👉 But here’s the catch: Variables (declared with var) are hoisted but initialized as undefined. Functions are fully hoisted, meaning you can call them even before their declaration in the code. 💡 Example: console.log(name); // undefined var name = "Ryan"; During compilation, the declaration var name; is moved to the top, but the assignment (= "Ryan") happens later — that’s why the output is undefined. 🧠 Key Takeaway: Hoisting helps JavaScript know about variables and functions before execution, but understanding how it works is crucial to avoid tricky bugs. #JavaScript #WebDevelopment #Frontend #ProgrammingConcepts #Learning #Hoisting #CodeTips

Understanding the difference between JavaScript's forEach() and map() is crucial for writing efficient code. Both iterate over arrays, but with key differences: forEach() runs a function on each array element without returning a new array. It’s great for side effects like logging or updating UI. map() transforms each element and returns a new array, perfect for data transformation without mutating the original array. Use forEach() when you want to perform actions without changing the array, and map() when you want to create a new array from existing data. Quick example: javascript const numbers = [1, 2, 3]; numbers.forEach(num => console.log(num * 2)); // Just logs the result const doubled = numbers.map(num => num * 2); // Returns [2, 4, 6] Master these to write cleaner, more expressive JavaScript! #JavaScript #WebDevelopment #ProgrammingTips #Coding

Leveling Up in JavaScript Today I explored some powerful JS concepts: Destructuring – unpack values from arrays or objects easily. Spread syntax – clone or merge arrays/objects efficiently. Hoisting – JS moves declarations to the top before execution. IIFE (Immediately Invoked Function Expression) – a function that runs right after it’s defined. These small concepts build the foundation for cleaner, smarter code. What’s your favorite JavaScript concept? #JavaScript #WebDevelopment #LearningInPublic

🔒 JavaScript Closures: The Private Diary Analogy Ever wondered how JavaScript "remembers" things? Let me explain closures with a real-world analogy. Think of a closure like a private diary with a lock: 📖 The diary (outer function) contains your secrets (variables) 🔐 Only you have the key (inner function) to access those secrets ✨ Even after you close the diary, the key still works Why does this matter? The count variable is trapped inside the closure. No one can directly access or modify it from outside. It's like data privacy built into JavaScript! Real-world use case : This powers every search bar you've used that waits for you to stop typing! The key insight: Closures let inner functions remember their environment, even after the outer function has finished executing. Have you used closures in your code today? Share your favorite use case below! 👇 #JavaScript #WebDevelopment #ReactJS #Programming #Frontend #CodingTips #SoftwareEngineering

Think JavaScript Await Is Same Everywhere? That’s Only Half Truth The behavior changes dramatically depending on where it’s being used. I recently learnt that the loop construct you choose completely changes how await behaves. Let me show you what I wish someone had explained to me six months ago, before I wasted hours debugging async/await issues. #javascript #typescript https://lnkd.in/d8ZB5XXG

Ever wondered how JavaScript actually runs your code behind the scenes? 👀 I’ve created a quick-reference cheat sheet on JavaScript’s Dynamic Runtime — covering the Execution Context, Call Stack, Heap, Event Loop, and how JS manages async operations through its task queues. Feel free to download and share the PDF. Hope it helps! ⚡ #JavaScript #FrontendDevelopment #ProgrammingTips #AsyncProgramming #WebDev #JSRuntime #Developers #TechLearning

The JavaScript Event Loop — The Hidden Multitasking Hero If JavaScript is single-threaded, how does it look like it’s doing so many things at once? 🤔 Meet the Event Loop — the patient snake 🐍 that makes everything flow smoothly. 🧩 In simple words: JS runs one thing at a time (main thread). When async tasks finish, the Event Loop decides when to bring them back into action — like a patient teacher calling students one by one from different queues 😄 ✨ Takeaway: --> Promises (microtasks) always run before setTimeout (macrotasks). --> JS isn’t truly “multi-threaded” — it’s just a great illusionist. 🎩 Next up → 🧠 “this” Keyword — The Most Confused Owl in JavaScript 🦉 #JavaScript #EventLoop #AsyncJS #WebDevelopment #FrontendDevelopment #CodingCommunity #100DaysOfCode #LearnToCode #MERNStack #ProgrammingHumor

⚙ Understanding Functions in JavaScript — The Building Blocks of Code A function in JavaScript is like a mini-program inside your main program. It allows you to reuse code, organize logic, and make your code modular. --- 💡 Definition: A function is a block of code designed to perform a particular task. You can define it once and call it multiple times. --- 🧠 Syntax: function greet(name) {  console.log("Hello, " + name + "! 👋"); } greet("Kishore"); greet("Santhiya"); ✅ Output: Hello, Kishore! 👋 Hello, Santhiya! 👋 --- 🧩 Types of Functions: 1. Named Function function add(a, b) {  return a + b; } 2. Anonymous Function const multiply = function(a, b) {  return a * b; }; 3. Arrow Function const divide = (a, b) => a / b; --- ⚙ Why Functions Matter: ✅ Reusability ✅ Readability ✅ Easier debugging ✅ Cleaner, modular code --- 🔖 #JavaScript #WebDevelopment #FunctionsInJS #Frontend #CodingTips #JSConcepts #LearnToCode #100DaysOfCode #KishoreLearnsJS #DeveloperJourney #WebDevCommunity #CodeLearning