Understanding Prototype Inheritance in JavaScript

JavaScript thing I randomly remembered today 😅 You know how let and const throw an error if you try to use them before declaring? That weird phase has a name — Temporal Dead Zone (TDZ). console.log(a); // ❌ ReferenceError let a = 5; It’s not that a doesn’t exist. It’s there... just not initialized yet. Basically, JS says “I know you declared it, but don’t touch it till I’m ready.” 😂 var doesn’t have this — which is why it caused chaos in old codebases. Crazy part? This all happens before your code even runs. JavaScript is wild sometimes 😅 #JavaScript #WebDevelopment #CodingLife #Frontend

💡 Did you know forEach() uses more memory than a simple for loop in JavaScript? Most developers use forEach() for cleaner code… But under the hood, it actually allocates more memory than a traditional for loop. Let’s look at a simple example: 👇🏻 👇🏻 👇🏻 #javascript #cleancode #efficency #memory #optimization

🚀 Dominator.js Source Code Now Available! The login form example, fully written with Dominator.js using the nested object syntax, is now ready to download from our platform. Developers can copy, paste, and run the example immediately to see how Dominator.js builds interactive forms, handles events, and applies styling — all through clean, structured objects. 🎬 We’ve also included a short demo video showing exactly how to download and test the example. 💡 Reminder: While testing is quick and fun, be sure to check out our documentation to understand every part of the code and master the framework. 👉 Download and explore here: https://lnkd.in/dpXHvt6i #DominatorJS #WebDevelopment #JavaScript #CongoDevelopers #DevTools #CopyPasteAndLearn #LoginForm #LearnByDoing

Ever seen a variable live even after its function dies? That’s Closure — the memory ninja of JavaScript 🧠 One of JavaScript’s most powerful (and tricky) features 💡 Let’s look at a simple example 👇 function counter() { let count = 0; return function () { count++; console.log(count); }; } const increment = counter(); increment(); // 1 increment(); // 2 increment(); // 3 Wait… how does count still remember its value? Didn’t the counter() function finish already? 😅 Here’s the magic 🪄 > A closure allows a function to “remember” the variables from the scope in which it was created — even after that scope is gone. In this example, The inner function still has access to count, Because it closes over the variables from its outer function. That’s why we call it a Closure 🔁 Closures are the reason we can create: ✅ Private variables ✅ Function factories ✅ Modular, memory-efficient code In short — > A closure is how JavaScript gives functions memory 🧠 #JavaScript #Closures #WebDevelopment #Frontend #MERNStack #NodeJS #ReactJS #Coding #SoftwareEngineering #Developers #JSFundamentals

🚀 Just finished a small JavaScript project! I built a modal window that opens and closes when clicking buttons, the overlay, or pressing the Escape key. 🧠 This helped me understand: - querySelector / querySelectorAll - addEventListener - classList.add() and .remove() - Keyboard events like keydown Check out the full project on GitHub 👇 🔗 https://lnkd.in/euzZQVBA #JavaScript #WebDevelopment #Frontend #LearningInPublic #Makhilens

Today is Day 10, and I explored some of the most important function-related concepts in JavaScript: ✅ Pure Functions ✅ First-Class & Higher-Order Functions ✅ map(), filter(), and reduce() ✅ Argument Object & Rest Parameter ✅ Variable Scope (Global, Local, Block) ✅ Scope & Scope Chain ✅ Recursion & Closures #Day10 #JavaScript #FrontendDevelopment #100DaysOfCode #LearningInPublic

🔥 Today I finally understood one of JavaScript’s most mind-bending concepts — CLOSURES! At first, I used to see “closure” and think — what even is that?! 😅 But once I got it, it completely changed how I think about functions in JS. In simple words 👇 A closure is when an inner function remembers and accesses variables from its outer function — even after the outer function has finished running. quick example: function counter() { let count = 0; return function() { count++; return count; } } const add = counter(); console.log(add()); // 1 console.log(add()); // 2 Even though counter() has finished, the inner function remembers count — that’s the magic of closures 🔥 It’s one of those things that makes JavaScript feel alive — functions with memory! #JavaScript #Closures #WebDevelopment #LearningInPublic #FrontendDeveloper #100DaysOfCode #CodingJourney

JavaScript reminder that hit me again today 😅 Not all “functions” in JS behave the same. Hoisting treats them completely differently depending on how you write them. // 1. Function declaration sayHi(); // works function sayHi() { console.log("Hello"); } // 2. Function expression with var sayHi(); // TypeError: sayHi is not a function var sayHi = function () {}; // 3. Function expression with let/const sayHi(); // ReferenceError const sayHi = () => {}; Same idea… totally different behavior. Function declarations get lifted fully. var just gets hoisted as undefined. And let / const sit in the “don’t touch me yet” zone. It’s wild how many bugs come from just this one thing 😅 JavaScript keeps us humble. #javascript #webdevelopment #codinglife #frontend #devhumor

Today’s JavaScript Learning: DOM & Window Object I explored how JavaScript interacts with the browser environment using the Window object and the Document Object Model (DOM). Learnt how to: Access and manipulate HTML elements dynamically using methods like getElementById() getElementsByClassName() getElementsByTagName() querySelector() & querySelectorAll() Modify content and style directly from JavaScript using properties like innerText, innerHTML, and textContent Create and update elements in real time — like appending unique text to multiple divs! This session really helped me understand how JavaScript controls and updates web pages behind the scenes. #javascriptlearning #webdevelopment #frontend #dommanipulation #codingjourney

Just solved an easy-level question that’s deceptively tricky if you’re new to closures in JavaScript! 💡 Why it’s interesting: Even though the problem seems simple, it requires understanding how closures let a function “remember” variables from its outer scope. This is what allows us to ensure a function can only be called once. 🔑 Quick hint on closures: A closure is like a backpack for a function—it carries along variables from its outer function even after the outer function has finished executing. Perfect for scenarios like this! #JavaScript #LeetCode #DSA #Closures #CodingJourney