JavaScript

The JavaScript landscape continues to evolve, and ES2024 (ECMAScript 2024) brings a fresh batch of features that aim to improve developer experience, boost performance, and provide more expressive power to the language. Let’s dive into the confirmed features for ES2024! 1. Set Methods JavaScript finally brings native set operations to the Set object with these…

jQuery is a fast, lightweight, and feature-rich JavaScript library designed to simplify common JavaScript tasks. Released in 2006 by John Resig, it has been widely adopted for web development due to its ability to handle a wide range of operations with minimal code. Here’s a breakdown of what makes jQuery significant: Key Features of jQuery…

JavaScript bitwise operations work at the binary level, performing calculations directly on the binary representation of numbers. These operations are efficient and useful for low-level programming tasks like setting flags, masking, or optimizing performance. Bitwise Operators 1. AND (&) 2. OR (|) 3. XOR (^) 4. NOT (~) 6. Right Shift (>>) 7. Unsigned Right…

JavaScript destructuring is a syntax that allows you to unpack values from arrays or properties from objects into distinct variables. It is a concise and readable way to extract data. Destructuring Arrays You can extract values from an array and assign them to variables: Destructuring Objects You can extract values from objects and assign them…

JavaScript Regular Expressions (regex or regexp) are powerful tools for matching patterns in strings. They are used for validating, searching, extracting, and replacing text. Basic Syntax 2. RegExp constructor: Flags Flags modify the behavior of the regex: JavaScript Regular Expressions (regex or regexp) are powerful tools for matching patterns in strings. They are used for…

The “use strict”; directive in JavaScript enforces a stricter parsing and error-handling mode. This directive, which you place at the top of a file or function, helps avoid some common mistakes and provides a safer environment for executing JavaScript code. Here’s a breakdown of how “use strict”; affects JavaScript code: 1. How to Enable Strict…

In JavaScript, the map() method is used to create a new array by calling a function on every element in an existing array. It doesn’t modify the original array; instead, it returns a new array with the transformed elements. Syntax Example 1: Basic map() Usage Let’s create an array of numbers and use map() to…

In JavaScript, an “event” is an action or occurrence that happens in the browser, like a user clicking a button, submitting a form, loading a page, or resizing the window. JavaScript allows you to respond to these events by executing code when they happen. Here are some common types of events in JavaScript and examples…

JavaScript Variables can be declared in 4 ways: 1. Automatically They are automatically declared when first used: 2.var Example: 3. let Example: 3. const Example: Summary Keyword Scope Re-declaration Reassignment Hoisting var Function / Global Allowed Allowed Yes (initially undefined) let Block Not allowed Allowed Yes (in “temporal dead zone”) const Block Not allowed Not…

Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their scope (either the global scope or the function scope) during the compilation phase. This means you can use variables and functions before they are declared in the code. However, only the declarations are hoisted, not the initializations. Let’s…