> Portal Navigation:
> 
> - Append `.md` to any URL under `https://dev.wix.com/docs/` to get its markdown version.
> - Pages are either content pages (article or reference text) or menu pages (a list of links to child pages).
> - To get a menu page, truncate any URL to a parent path and append `.md` (e.g. `https://dev.wix.com/docs/sdk.md`, `https://dev.wix.com/docs/sdk/core-modules.md`).
> - Top-level index of all portals: https://dev.wix.com/docs/llms.txt
> - Full concatenated docs: https://dev.wix.com/docs/llms-full.txt

## Resource: $w

## Namespace: custom-class-list

## Article: Introduction

## Article Link: https://dev.wix.com/docs/velo/velo-only-apis/$w/custom-class-list/introduction.md

## Article Content:

# Introduction
> This property is only available to Wix Studio users.

CustomClassList provides functionality for manipulating an element's custom CSS classes. For example, 
you can add a custom class to an element or replace an existing class with a new custom class.

Custom classes are those that you define for a site, not the predefined global classes
that are provided for each element.  

You define custom CSS classes in the `global.css` file which can be accessed in the Page Code section of the editor.

With CustomClassList, you can use code to:
+ [Add](https://dev.wix.com/docs/velo/velo-only-apis/$w/custom-class-list/add.md), [remove](https://dev.wix.com/docs/velo/velo-only-apis/$w/custom-class-list/remove.md), [replace](https://dev.wix.com/docs/velo/velo-only-apis/$w/custom-class-list/replace.md), or [toggle](https://dev.wix.com/docs/velo/velo-only-apis/$w/custom-class-list/toggle.md) custom classes.
+ [Retrieve](https://dev.wix.com/docs/velo/velo-only-apis/$w/custom-class-list/values.md) a list of an element's CSS classes.
+ Check if an element's class list [contains](https://dev.wix.com/docs/velo/velo-only-apis/$w/custom-class-list/contains.md) a specific custom CSS class.

> **Note:** CustomClassList only affects custom classes. If you use it for global classes, there is no effect on the element.  

## See also
+ [About CSS Styling](https://dev.wix.com/docs/develop-websites/articles/coding-with-velo/frontend-code/custom-css/about-css-styling.md)
+ [Styling Elements with CSS](https://dev.wix.com/docs/velo/velo-only-apis/$w/styling-elements-with-css.md)
+ [About CSS Styling](https://www.youtube.com/watch?v=xynm4m83CqM)