Meta Description:Confused why a Promise.then() runs before setTimeout() with a 0ms delay? Learn how JavaScript’s event loop, microtasks, and macrotasks control the execution order, with real code examples. 🔍 Introduction JavaScript is single-threaded, but thanks to the event loop, it can handle asynchronous operations with surprising precision. One common interview or real-world developer question is: […]
🧠 What Are Nested Closures in JavaScript? In JavaScript, a closure is a function that retains access to variables from its outer scope—even after the outer function has executed. When one closure contains another closure, this is called a nested closure. Nested closures allow deep control over private variables, function factories, currying, and advanced patterns […]
When you define multiple functions with the same name inside another function in JavaScript, only the last declaration takes effect due to function hoisting. JavaScript hoists all function declarations to the top of their scope, and if the same function name is declared more than once, the latest version overrides the previous ones — even […]
The Fibonacci series is a sequence of numbers where each number is the sum of the two preceding ones. It starts with 0 and 1, and continues indefinitely. Mathematically, the series is represented as: In this blog post, we will walk through a simple JavaScript code to generate the Fibonacci series up to the nth […]
Understanding the Ternary Operator with a Real-Life Example in JavaScript In JavaScript, the ternary operator is a powerful and concise tool for making decisions based on conditions. It’s often used as a shorthand for an if-else statement and can simplify complex logic, making code more readable and compact. In this blog, we’ll dive into a […]
In JavaScript, the switch statement is a powerful tool used to make decisions based on multiple conditions. It’s often more efficient and cleaner than using multiple if-else statements, especially when you’re dealing with several possible values for the same variable. But, just like any programming feature, understanding the nuances is essential. In this blog, we’ll […]
In this post, we’ll take a deep dive into understanding how the splice() method works in JavaScript, specifically focusing on the statement array.splice(1, 2) when applied to the array [10, 20, 30, 40, 50]. We’ll go through step-by-step explanations, code breakdowns, and key insights to help you fully understand what’s happening in this operation. What […]
Introduction: JavaScript is a versatile programming language widely used in web development, and understanding its core concepts is essential for writing efficient and clean code. One of the key concepts you will encounter in JavaScript is loops. Loops allow you to repeat a block of code multiple times, and they are particularly useful when you […]
In JavaScript, the spread operator (…) is one of the most powerful and frequently used features for manipulating arrays, objects, and other iterable data structures. It allows developers to efficiently handle, copy, merge, and destructure data without the need for additional logic or functions. In this guide, we’ll explore how the spread operator works, its […]
In the world of programming and algorithms, checking if a number is prime is a fundamental concept. Prime numbers play a crucial role in various applications, especially in cryptography, mathematics, and problem-solving tasks. If you’re a JavaScript developer looking to implement a prime number checker, you’re in the right place! In this blog post, we […]
