Objects in JavaScript
In JavaScript, an object is one of the most important data structures, allowing developers to represent and manipulate real-world entities in a meaningful way. Objects store collections of key-valu...
Array in JavaScript
In JavaScript, an array is a data structure that allows you to store multiple values in a single variable. Arrays are one of the most commonly used features in JavaScript, offering a flexible way t...
Array methods in JavaScript
Arrays are a fundamental data structure in JavaScript, allowing developers to store and manipulate collections of elements. JavaScript provides a variety of built-in array methods that make it easy...
var, let, and const in JavaScript
In JavaScript, variable declaration is an essential concept. The language provides three ways to declare variables: var, let, and const. While they may seem similar at first glance, each has distin...
Callback vs Promise in JavaScript
JavaScript, being single-threaded, relies heavily on asynchronous programming to handle tasks that may take time, such as making API calls, reading files, or waiting for user input. Historically, c...
Async and Await in JavaScript
JavaScript is single-threaded and asynchronous by nature, which means tasks can run in the background without blocking the main thread. Prior to ES2017, asynchronous code was mainly handled using c...
Promises in JavaScript
JavaScript's Promise is a powerful feature that makes handling asynchronous operations simpler and more readable. Promises allow developers to work with asynchronous code in a more organized way, a...
Callbacks in JavaScript
In JavaScript, functions are treated as first-class citizens, meaning they can be passed around as arguments to other functions, returned from other functions, and assigned to variables. This is th...
Difference Between == and === in JavaScript
In JavaScript, you often encounter two types of equality operators: == (loose equality) and === (strict equality). While they may seem similar at first glance, they function quite differently. Unde...
Spread operator in JavaScript
The spread operator (denoted by ...) is one of the most powerful and versatile features introduced in ES6 (ECMAScript 2015). It allows developers to work with arrays, objects, and function argument...