Introduction

When writing JavaScript code for medium to large projects (10+ files), it is helpful to understand all of the possible features that this language provides. It is always easier and quicker to use what is already there than reinvent the wheel. These built-in methods will not only help you with performing basic functions, but they will also help with code readability and maintainability. These built-in methods range from basic calculations to the complex array and string manipulation that developers face every day. By using these built-in methods, we can reduce our code size and help with the performance of our application.

JavaScript is usually used as a functional language, but you can use it for Object-Oriented Programming (OOP). In recent years, many new features, such as classes, have been added to the language in response to the growing need for JavaScript to accomplish more complex and data-driven tasks. While it is still possible to create JavaScript using function...