JavaScript's includes() checks if an array contains a value, returning true or false. It’s case-sensitive, detects NaN, and works with negative indices.

Learn JavaScript variables (var, let, const), their scope, hoisting, and best practices for cleaner, error-free coding.

JavaScript function declarations are fundamental for writing clean, reusable, and efficient code. This guide covers syntax, hoisting, and best practices.

A deep dive into JavaScript class declarations, covering syntax, instances, methods, inheritance, private fields, and static properties.

Learn the essentials of JavaScript's import and export statements to create modular, reusable, and maintainable code for better project organization.

Learn JavaScript objects, properties, methods, prototypes, inheritance, and constructors to master object-oriented programming.

JavaScript's sort() arranges arrays, defaulting to string sorting. Use compare functions for numeric or custom sorts. Flexible but impacts performance.

JavaScript's reverse() flips array elements in place, offering simple yet powerful data manipulation. Use with care—it modifies the original array!

A clear guide to JavaScript functions—covering declarations, expressions, arrow functions, and best practices for clean coding.

Learn JavaScript function declarations—syntax, hoisting, parameters, returns, nested functions, ES6 arrow functions, and common mistakes.