Event Delegation in JavaScript: Cleaner Code with Event Bubbling

⚠️ The Danger of Splicing Arrays in a Loop "While solving the 'Move Zeroes' challenge today, I encountered a classic JavaScript pitfall: Modifying an array's length while iterating over it. The Mistake: Using .splice() inside a for loop. When you remove an element, the next one shifts left, and your loop index skips it! The Lesson: Always adjust your index or, even better, use the Two-Pointer technique. It's not just safer; it's much more performant for large datasets. Small bugs teach the biggest lessons! 🚀" "Did you know? JavaScript (ES6) allows you to swap array elements in a single line using destructuring : [a, b] = [b, a]. Clean, readable, and efficient!" Feel free to check out my progress and solutions on my LeetCode profile: I've shared my LeetCode profile link in the first comment below! #JavaScript #CodingTips #WebDevelopment #ProblemSolving #LeetCode #AngularDeveloper

🚀 30 Days of JavaScript – Day 6 Continuing my journey to improve my JavaScript logical thinking by building small programs every day. 💡 Today’s Program: Find the Largest Number (User Input) This program allows the user to enter numbers separated by commas and then finds the largest number in the list. 🧠 Concepts Used: • prompt() for user input • split() to convert input into an array • map(Number) to convert strings into numbers • for loop for iteration • Conditional comparison (if statement) 📌 Example Input: 10,25,7,90,30 Output: Largest Number: 90 🎥 Demo below 👇 Full source code in the First comment. #JavaScript #WebDevelopment #CodingJourney #ProblemSolving #LearningJavaScript #30DaysOfCode

JavaScript objects have a powerful feature called Prototype that enables inheritance. In JavaScript, if an object doesn’t have a specific property or method, the engine automatically looks for it in its prototype. This process continues up the prototype chain until the property is found or the chain ends. Example: function Person(name) { this.name = name; } Person.prototype.greet = function () { console.log("Hello, my name is " + this.name); }; const john = new Person("John"); john.greet(); Even though john doesn’t directly have the greet() method, it can still access it through Person.prototype. This mechanism allows JavaScript objects to share methods and inherit behavior efficiently. Understanding prototypes helps you better understand how inheritance and object behavior work behind the scenes in JavaScript. Follow for more JavaScript concepts explained visually. #javascript #webdevelopment #frontenddeveloper #coding #learninginpublic #100DaysOfCode

🚨 JavaScript Hoisting – Something Most Developers Still Misunderstand Most developers say: 👉 “JavaScript moves variables to the top of the scope.” But that’s not actually what happens. Let’s test this 👇 console.log(a); var a = 10; Output: undefined Now try this: console.log(b); let b = 20; Output: ReferenceError: Cannot access 'b' before initialization 💡 Why the difference? Both var and let are hoisted. But the real difference is initialization timing. ✔ var is hoisted and initialized with undefined during the creation phase. ✔ let and const are hoisted but stay inside the Temporal Dead Zone (TDZ) until the line where they are declared. That’s why accessing them before declaration throws an error. 👉 So technically: JavaScript doesn’t “move variables to the top”. Instead, the JavaScript engine allocates memory for declarations during the creation phase of the execution context. Small detail. But it explains a lot of confusing bugs. 🔥 Understanding this deeply helps when debugging closures, scope issues, and async code. #javascript #frontend #webdevelopment #reactjs #coding #softwareengineering

⚡ A Common JavaScript Misconception About the Event Loop Many developers think: "setTimeout(fn, 0) runs immediately." That’s incorrect. Even with 0 milliseconds, the callback still goes through the Event Loop cycle. Example: console.log("A"); setTimeout(() => console.log("B"), 0); Promise.resolve().then(() => console.log("C")); console.log("D"); Output: A D C B Why? Because JavaScript has two queues: 🔹 Microtask Queue → Promises, MutationObserver 🔹 Callback Queue → setTimeout, setInterval The Event Loop always processes microtasks first. Understanding this difference is critical when debugging async behavior in real applications. Master the Event Loop → Master asynchronous JavaScript. #javascript #asyncjavascript #webdevelopment #frontend #mernstack

Day 22 of my JavaScript journey 🚀 Updated my Contact Form by adding JavaScript functionality to make it more interactive and user-friendly. Features: ✔️ Form validation (required fields & email format) ✔️ Real-time error messages ✔️ Prevent submission on invalid input ✔️ Improved user experience with dynamic feedback This update helped me understand how to move from just designing forms to building functional and user-friendly applications. 🔗 Live Demo: https://lnkd.in/gcawshv3 💻 GitHub Repo: https://lnkd.in/gPDFb_vJ Learning not just to build, but to improve and refine my projects step by step. 💻 #JavaScript #WebDevelopment #FrontendDeveloper #100DaysOfCode #CodingJourney

JavaScript Closures — made simple 💡 Closures sound complex… but they’re actually simple once you get the idea. A closure is when a function remembers variables from its outer scope even after the outer function has finished executing. Think of it like this: An inner function carries a “backpack” of variables and never forgets them. How it works: 1. Outer function creates a variable 2. Inner function uses that variable 3. Outer function returns the inner function 4. Inner function still has access to that variable Why closures are powerful: • Data privacy (encapsulation) • Maintain state between function calls • Used in callbacks, event handlers, React hooks • Foundation for advanced JavaScript concepts Real-world uses: • Counters • Private variables • One-time execution functions • Custom hooks & memoization One-line takeaway: A closure = function with a memory of its lexical scope If you understand closures, you’re moving from basics to real JavaScript thinking. What concept in JavaScript took you the longest to understand? #JavaScript #Closures #WebDevelopment #Frontend #CodingConcepts #LearnJavaScript #Programming #DeveloperLife

JavaScript Closures — made simple 💡 Closures sound complex… but they’re actually simple once you get the idea. A closure is when a function remembers variables from its outer scope even after the outer function has finished executing. Think of it like this: An inner function carries a “backpack” of variables and never forgets them. How it works: 1. Outer function creates a variable 2. Inner function uses that variable 3. Outer function returns the inner function 4. Inner function still has access to that variable Why closures are powerful: • Data privacy (encapsulation) • Maintain state between function calls • Used in callbacks, event handlers, React hooks • Foundation for advanced JavaScript concepts Real-world uses: • Counters • Private variables • One-time execution functions • Custom hooks & memoization One-line takeaway: A closure = function with a memory of its lexical scope If you understand closures, you’re moving from basics to real JavaScript thinking. What concept in JavaScript took you the longest to understand? #JavaScript #Closures #WebDevelopment #Frontend #CodingConcepts #LearnJavaScript #Programming #DeveloperLife

📌 LinkedIn Post Content 🚀 30 Days of JavaScript – Day 7 Continuing my journey of improving JavaScript logical thinking by solving small problems daily. 💡 Today’s Program: Remove Duplicate Numbers from an Array This program takes numbers as input and removes duplicate values to create a list of unique numbers. 🧠 Concepts Used: • Arrays • split() and map() • includes() method • for loop • Conditional logic Example: Input → 1,2,3,2,4,1,5 Output → [1,2,3,4,5] 🎥 Demo below 👇 Full source code in the First comment. #JavaScript #CodingJourney #ProblemSolving #WebDevelopment #LearningJavaScript

#Hello #Connections 👋 #100DaysOfCodeChallenge | #Day58 Project: Live Code Editor What I built Today I built a Live Code Editor where you can write HTML, CSS, and JavaScript and instantly see the output — similar to a mini CodePen. Technologies Used HTML5 CSS3 JavaScript (DOM Manipulation, iframe, eval) Challenge I faced Rendering HTML, CSS, and JavaScript together in real-time without refreshing the page. How I solved it Used an iframe for live preview and dynamically injected HTML & CSS, while executing JavaScript using eval(). Live Demo: https://lnkd.in/dnKJwx9J Open to feedback and suggestions Code Of School Avinash Gour | Ritendra Gour #FrontendDeveloper #JavaScript #WebDevelopment #100DaysOfCode #DeveloperJourney #Coding #UIUX