CSS Data

This is a collection of data related to CSS. It contains various information like:

• A list of valid CSS properties, and their associated values
• A list of valid pseudo-classes
• A list of valid pseudo-elements
• A list of valid special characters

This data is used by Yass CSS to generate atomic classes. It exists because MDN Data does not currently maintain an array of valid values a CSS property can set.

Note: This data is probably incomplete. If you notice something missing. Feel free to open a GitHub issue.

Note: Be aware that the primary purpose of this data is to be consumed by Yass CSS. As such, it is subject to breaking changes without warning.