Aditya Thakor’s Post

🚀 JavaScript Concepts Series – Day 5 / 30 📌 Hoisting in JavaScript 👀 Let’s Revise the Basics 🧐 Understanding Hoisting in JavaScript helps you know how variables and functions behave before execution. Hoisting means JavaScript moves declarations to the top of their scope during the memory creation phase. 🔹 var Hoisting Declared variables are hoisted Initialized with undefined Can be accessed before declaration (but value will be undefined) 🔹 let & const Hoisting Also hoisted But not initialized Stay in Temporal Dead Zone (TDZ) until declared Accessing before declaration → ReferenceError 🔹 Function Hoisting Function declarations are fully hoisted Can be called before declaration Function expressions are not hoisted like functions 💡 Key Insight var → Hoisted with undefined let & const → Hoisted but in TDZ Functions → Fully hoisted (only declarations) Understanding hoisting helps you avoid unexpected bugs and write predictable code execution flow. More JavaScript concepts coming soon. 🚀 #javascript #js #webdevelopment #frontenddeveloper #coding #programming #developers #softwaredeveloper #learnjavascript #javascriptdeveloper #codinglife #devcommunity #webdev #reactjs #mernstack #codingjourney #codeeveryday #developerlife #100daysofcode #techlearning

💡 Understanding Scope in JavaScript One of the most important concepts in JavaScript is Scope. Scope defines where variables can be accessed in your code. There are three main types of scope in JavaScript: 🔹 Global Scope Variables declared outside any function are accessible anywhere in the program. let name = "Muneeb"; function showName() { console.log(name); } showName(); // Accessible because it's global 🔹 Function Scope Variables declared inside a function can only be used inside that function. function greet() { let message = "Hello"; console.log(message); } greet(); // console.log(message); ❌ Error 🔹 Block Scope Variables declared with "let" and "const" inside "{ }" are only accessible within that block. if (true) { let age = 25; console.log(age); } // console.log(age); ❌ Error 📌 Understanding scope helps developers write cleaner code and avoid bugs related to variable access. Mastering these fundamentals makes JavaScript much easier to understand and improves problem-solving skills. #JavaScript #WebDevelopment #FrontendDeveloper #Coding #LearnToCode

🚀 JavaScript Concepts Series – Day 3 / 30 👀 Let's Revise the Basics🧐 Understanding the difference between var, let, and const is a fundamental concept in JavaScript. Choosing the right variable declaration helps prevent bugs and makes your code more predictable. 🔹 var Function scoped Can be redeclared Can be reassigned Hoisted (initialized with undefined) 🔹 let Block scoped Cannot be redeclared in the same scope Can be reassigned Hoisted but stays in Temporal Dead Zone (TDZ) until initialized 🔹 const Block scoped Cannot be redeclared Cannot be reassigned Must be initialized during declaration 💡 Key Insight var → Old way of declaring variables (function scoped) let → Use when the value may change const → Use when the value should not change Using let and const helps write safer and more maintainable JavaScript code. More JavaScript concepts coming soon. 🚀 #javascript #js #webdevelopment #frontenddeveloper #coding #programming #softwaredeveloper #developers #learnjavascript #javascriptdeveloper #codinglife #devcommunity #webdev #reactjs #mernstack #codingjourney #codeeveryday #techlearning #developerlife #100daysofcode

getElementById vs querySelector in JavaScript When working with the DOM, selecting elements efficiently is very important. Two commonly used methods are getElementById() and querySelector() — but they are not the same. In this article, I explain: • How each method works • Key differences between them • Performance considerations • Practical examples for developers If you’re learning JavaScript, Frontend Development, or preparing for interviews, this comparison will help you understand the concept clearly. 📘 Read the full article: 👉 https://lnkd.in/g_udtdb8 #JavaScript #FrontendDevelopment #WebDevelopment #Programming #Coding #SoftwareDevelopment

🔥 Why most developers still don’t understand this in JavaScript… At some point, every JavaScript developer has thought: 👉 "Why is this behaving differently here?" 🤯 You write the same function… but suddenly it works in one place and breaks into another. That’s where confusion starts. 💡 The truth is: this is not about where it’s written… it’s about how the function is called. And that’s exactly what most developers miss. ⚡ Common mistakes: - Assuming this always refers to the current object ❌ - Confusion between arrow functions and regular functions - Ignoring execution context 🎯 Once you understand this, everything changes: Better debugging, cleaner code and stronger fundamentals. 🎥 Watch this (simple explanation): https://lnkd.in/dM5mV_cE 💬 Be honest… did this confuse you when you started? 😄 #JavaScript #WebDevelopment #Coding #Programming #Frontend #NodeJS #ReactJS #Developers #LearnToCode #CodingLife #Tech #SoftwareDevelopment #JavaScriptTips #FullStack #DeveloperCommunity

As a JavaScript developer ☕️📝👨💻, we use map(), filter(), every(), some(), find(), findIndex() reduce() almost daily. But have you ever thought What is actually powering all of these under the hood? 🤔 Meet the hidden superstar: 💁🌟”Symbol.iterator” JavaScript arrays are not just normal lists they are smart, iterable objects Every array has a built-in method: arr[Symbol.iterator]() (You can find it inside Array.prototype 👀) This returns something called an iterator 👉 And it works like this: • It gives values step-by-step like { value: ..., done: true/false } with next() calling • Inside the iterator the logic changes according to the method based on filter/map/reduce • Finally returns formated list or object So next time you use map() or filter() don’t forget to appreciate this Symbol.iterator concept 👏 💡 Now the where does this Generator concept connects to this and what is it ❔❓ 🤷 What’s is this Symbol and prototype? I’ll explain that in the next post 🔥 Comment down your thoughts below 👇 Have you ever explored this before? ⸻ #JavaScript #Frontend #FrontendDevelopment #LearnToCode #CodeNewbie #Programming #Developers #Coding #JS #LearnWithCharan

🚀 JavaScript Concepts Series – Day 10 / 30 📌 Debouncing vs Throttling 👀 Let's Revise the Basics 🧐 Understanding Debouncing vs Throttling is essential for optimizing performance in real-world applications. These techniques control how often a function gets executed during frequent events. 🔹 Debouncing Executes function only after a delay Waits until user stops triggering the event Best for search inputs, typing function debounce(fn, delay) { let timer; return function () { clearTimeout(timer); timer = setTimeout(() => fn(), delay); }; } 🔹 Throttling Executes function at fixed intervals Limits how often function runs Best for scroll, resize events function throttle(fn, limit) { let flag = true; return function () { if (flag) { fn(); flag = false; setTimeout(() => (flag = true), limit); } }; } 💡 Key Insight Debounce → Executes after delay Throttle → Executes at intervals Debounce → Better for input Throttle → Better for continuous events Mastering these helps you improve performance and avoid unnecessary function calls. More JavaScript concepts coming soon. 🚀 #javascript #js #webdevelopment #frontenddeveloper #coding #programming #developers #softwaredeveloper #learnjavascript #javascriptdeveloper #codinglife #devcommunity #webdev #reactjs #mernstack #codingjourney #codeeveryday #developerlife #100daysofcode #techlearning #performance #debounce #throttle

🚀 Day 22 – Understanding the this Keyword in JavaScript If there’s one concept that confuses almost every JavaScript developer at some point… it’s this 😅 But once you get it right, everything starts to make sense 🔥 🧠 The Truth About this 👉 this doesn’t refer to where the function is written 👉 It refers to how the function is called That’s the game changer. ⚡ What I Learned Today ✔️ In objects → this refers to the object ✔️ In regular functions → this is global (or undefined in strict mode) ✔️ In arrow functions → no own this (inherits from parent) ✔️ In event listeners → this is the element 👨💻 Angular Dev Tip If you’ve ever lost this inside setTimeout or callbacks… you’re not alone 😄 👉 Arrow functions are your best friend here: They preserve the component context ✅ 💡 Why This Matters Understanding this helps you: Write cleaner, bug-free code Avoid unexpected behavior Master advanced JS concepts #JavaScript #Angular #FrontendDevelopment #WebDevelopment #100DaysOfCode #LearnInPublic

🚀 JavaScript Concepts Series – Day 6 / 30 📌 Closures in JavaScript 👀 Let’s Revise the Basics 🧐 A closure is when a function remembers variables from its outer scope even after the outer function has finished execution. 🔹 Key Points • Inner function can access outer variables • Data persists even after function execution • Useful for data privacy and state management 🔹 Example function outer() { let count = 0; return function inner() { count++; console.log(count); }; } const counter = outer(); counter(); // 1 counter(); // 2 💡 Key Insight Closure → Function + its lexical scope Remembers → Outer variables after execution Closures are widely used in callbacks, event handlers, and React hooks. More JavaScript concepts coming soon. 🚀 #javascript #js #webdevelopment #frontenddeveloper #coding #programming #developers #softwaredeveloper #learnjavascript #javascriptdeveloper #codinglife #devcommunity #webdev #reactjs #mernstack #codingjourney #codeeveryday #developerlife #100daysofcode #techlearning

🔄 Understanding the JavaScript Event Loop (Simplified):- One of the most important concepts every developer should master is the JavaScript Event Loop — the backbone of how asynchronous code works. 💡 Here’s the core idea: 🧠 Call Stack → Executes synchronous code ⚡ Microtask Queue → High priority (Promises, queueMicrotask) 🕒 Macrotask Queue → Lower priority (setTimeout, setInterval, DOM events) 👉 The Event Loop continuously: Executes all synchronous code Clears all microtasks Executes one macrotask Repeats 🔁 📌 Example: console.log(1); setTimeout(() => console.log(2), 0); Promise.resolve().then(() => console.log(3)); console.log(4); 👉 Output: 1 → 4 → 3 → 2 🚀 Key Takeaways: Promises (microtasks) always run before setTimeout (macrotasks) JavaScript is single-threaded but handles async tasks efficiently Understanding this helps avoid unexpected bugs in real-world apps 💬 If you’re working with React, Angular, or Node.js — this concept is a MUST. Are you confident with the event loop or still confused? 👇 Abhisek Nayak #JavaScript #EventLoop #AsyncProgramming #FrontendDevelopment #WebDevelopment #Coding #Developers #Programming #TechConcepts #SoftwareEngineering #ReactJS #Angular #NodeJS #Learning #Debugging