MDN CSS data

This folder contains data about the different features of the CSS language.

How to update the CSS JSON DB

A guide to making changes is provided in the How to update the CSS JSON DB document.

Different types of CSS data

The CSS data is split into these parts:

• at-rules: data | schema | docs
• functions: data | schema | docs
• properties: data | schema | docs
• selectors: data | schema | docs
• syntaxes: data | schema | docs
• types: data | schema | docs
• units: data | schema | docs