CSS Conditional Rules - CSS（层叠样式表） 编辑

CSS Conditional Rules is a CSS module that allows to define a set of rules that will only apply based on the capabilities of the processor or the document the style sheet is being applied to.

Reference

At-rules

• @document
• @media
• @supports
• @import

Specifications

Specification	Status	Comment
CSS Conditional Rules Module Level 3	Candidate Recommendation	Initial definition

Browser compatibility

@document rule

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

@import rule

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

@media rule

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

@supports rule

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.