![[Photo: group photo of the CSS working group in San Francisco]](/Style/CSS/csswg-2016.jpg)
Contact:
Bert BosCopyright © 2020 W3C®
Last updated 2021-01-22 01:35:39
This is a page from the Cascading Style Sheets Working Group Blog. Some other places to find information are the “current work” page, the www-style mailing list, the Future of CSS syndicator, and the issue list on Github.
Do you want to know how the CSS WG works? Fantasai has written about:csswg, An Inside View of the CSS Working Group at W3C.
The CSS Working Group has published a First Public Working Draft of CSS Cascading and Inheritance Level 5. This CSS module describes how to collate style rules and assign values by way of cascading and inheritance.
Level 5 adds “layers” to the cascade, along with a syntax for defining and sorting those layers. In the same way that cascade origins provide a balance of power between user and author styles, cascade layers provide a structured way to organize and balance concerns within a single origin – such as element defaults, third-party libraries, themes, components, and overrides. Authors are able to re-order the cascade of layers in an explicit way, without altering selectors or specificity within each layer, or relying on source-order to resolve conflicts across layers.
The following features have been added since Level 4:
@layer rule for defining cascade layers.Please send feedback by either filing an issue in GitHub (preferable) or sending mail to the (archived) public mailing list www-style@w3.org with the spec code ([css-cascade-5]) and your comment topic in the subject line. (Alternatively, you can email one of the editors and ask them to forward your comment.)