Function hoisting is a behavior in JavaScript where function declarations are moved, or “hoisted,” to the top of their containing scope during the compile phase before the code is executed. This means you can call a function before it is …

Self-invoking functions (also known as Immediately Invoked Function Expressions, or IIFE) are a common design pattern in JavaScript used to execute a function as soon as it is defined. They are useful when you want to create a function and …

In JavaScript, iterators allow you to define how a set of data should be iterated over. While JavaScript provides built-in iterators for arrays, strings, and other objects, you can also create user-defined iterators to customize iteration for custom data structures. …

Collect.js is a JavaScript library that provides a convenient and expressive API for working with arrays and objects, similar to Laravel’s Collections in PHP. It simplifies common array and object operations like filtering, sorting, and transforming, making code more readable …

Day.js is a minimalist JavaScript library for working with dates. It is often compared to Moment.js due to its similar API but is significantly smaller in size. Day.js makes it simple to parse, validate, manipulate, and format dates without compromising …

Chalk is a popular JavaScript library used to style terminal string output. It allows you to change text color, background color, and apply styles like bold, italic, and underline, making your console logs more visually appealing and easier to read. …

Moment.js is a powerful JavaScript library for parsing, validating, manipulating, and formatting dates and times. It simplifies working with dates and times in JavaScript by offering intuitive methods to handle common date/time-related tasks. In this tutorial, we will cover: Introduction …

ExcelJS is a powerful JavaScript library used to read, manipulate, and write Excel files. It allows developers to work with Excel data in .xlsx or .csv formats programmatically. This is extremely useful when generating reports, importing/exporting data, or working with …

Faker.js is a JavaScript library that allows you to generate fake data for testing and development. It can be used to generate random names, addresses, email addresses, phone numbers, and much more. This library is particularly useful when you need …

In JavaScript, a predicate is a function that returns a boolean value, i.e., either true or false. Predicates are typically used to test conditions in higher-order functions like filter(), some(), and every(). They are commonly used to make decisions, filter …

Operator Precedence Table This table ranks JavaScript operators by their precedence, with the higher-precedence operators (executed first) at the top. Operator Precedence Operator Description Associativity Example 1 () Grouping L -> R (expression) 2 . Member of object L -> …

In JavaScript, reserved keywords are terms that are set aside by the language for its internal use. These words cannot be used as identifiers (like variable names, function names, etc.). Using them as identifiers can result in errors or unexpected …

JavaScript syntax refers to the set of rules that defines how JavaScript code is written and structured. Understanding JavaScript syntax is crucial for writing correct and efficient programs. This tutorial will cover the most important aspects of JavaScript syntax, including …

Mixins in JavaScript are a flexible way to reuse code across multiple classes without using traditional inheritance. A mixin is an object or function that provides reusable methods, which can be mixed into other classes. Mixins help share behavior among …

Template literals (also called template strings) in JavaScript are a powerful feature introduced in ES6 (ECMAScript 2015). They allow you to create multi-line strings, embed variables and expressions into strings, and make string concatenation easier and more readable. In this …

In JavaScript, classes are a way to define blueprints for creating objects. While JavaScript has been an object-oriented language from the start, ES6 (ECMAScript 2015) introduced the class keyword, which simplifies working with object-oriented programming (OOP) concepts such as inheritance, …