JavaScript

JavaScript is designed to handle asynchronous operations gracefully. Whether you are fetching data from APIs, reading files, or executing time-consuming computations, Promises give you a structured way to manage asynchronous results. Two of the most commonly used Promise combinators are Promise.all and Promise.allSettled. At first glance, they may

If you’ve been writing JavaScript long enough, you’ve probably reached for instanceof at some point. At first glance, it feels like a neat way to verify if an object is an Array, a Date, a custom class, or something else. Unfortunately, instanceof is one of those features that

When working with asynchronous programming in JavaScript, it is tempting to check whether a value is a Promise using instanceof Promise. At first glance, this seems logical—after all, promises are the foundation of async/await, so why not verify them directly? But here’s the catch: instanceof Promise is

When building applications that track user progress—such as to-do lists, learning platforms, or project management dashboards—you’ll often need to calculate the percentage of tasks completed. This percentage provides a clear, user-friendly way to communicate progress at a glance. Let’s break down the logic, explore how to

If you’ve ever written JavaScript with console.log() sprinkled around timers, promises, and synchronous code, you’ve probably been surprised at the order of execution. Take this short snippet as an example: console.log("A"); setTimeout(function () { console.log("B"); }, 0); Promise.resolve() .then(function