Скачать или смотреть how to add and remove classes in javascript without jquery

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Okay, let's dive into adding and removing classes in JavaScript without relying on the jQuery library. We'll cover the basics, the `classList` API (which is the modern and preferred method), and provide detailed examples.

*Why Avoid jQuery for Class Manipulation?*

While jQuery greatly simplified class manipulation in the past, modern JavaScript provides a built-in `classList` API that is performant and straightforward. Relying solely on jQuery for class handling adds unnecessary overhead to your project, especially when the native JavaScript alternatives are robust and well-supported across browsers.

*Core Concepts*

Before we get into the code, let's understand the core concepts:

*DOM (Document Object Model):* The DOM is a tree-like representation of your HTML document. JavaScript interacts with the DOM to modify the content, structure, and style of your web page.
*Elements:* Elements are the individual building blocks of the HTML document (e.g., `p`, `div`, `a`).
*Classes:* Classes are attributes you assign to HTML elements to group them logically and apply CSS styles consistently. An element can have multiple classes.
*`className` Property:* This property gives you a string representing the entire class list of an element. It's an older method, but still useful in some scenarios.
*`classList` API:* This API is a more modern and efficient way to work with an element's classes. It provides methods like `add()`, `remove()`, `toggle()`, and `contains()`.

*Methods and Examples*

*1. Using the `className` Property (Less Recommended - But Good to Know)*

The `className` property provides a direct way to get or set the entire class list of an element as a string.

*Adding a Class:* You need to append the new class name to the existing `className`, ensuring you add a space to separate the class names.



*Removing a Class:* This is more involved because you need to manipulate the string of class names. ...

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