CSS WG Blog CSS Cascading and Inheritance: Updated Lev…

CSS Cascading and Inheritance: Updated Level 3 CR, Published Level 4 FPWD

The CSS Working Group has published an updated Candidate Recommendation of CSS Cascading and Inheritance Level 3 and also a First Public Working Draft of CSS Cascading and Inheritance Level 4. This CSS module describes how to collate style rules and assign values to all properties on all elements by way of cascading (choosing a winning declaration among many) and inheritance propagating values from parent to child).

Changes (which are just clarifications) since the last Candidate Recommendation are listed in the Changes section of L3 and additions to L4 are listed in the Changes section of L4.

The additions in Level 4 are:

• Re-introduced the default (aka bikeshed-me) keyword, which rolls back the cascade to the previous origin. (For authors, this resets the property to what it would be without any author-level rules.) This feature had been dropped from L3 due to lack of implementer interest; but there seems to be strong demand for it at this time.
• Introduced supports() syntax for conditional @import rules.

We need your help to get Level 4 to CR as there is one major open issue: the keyword name default conflicts with an existing value of the cursor property. So we need a new keyword. Opinions and suggestions welcome. There is some prior discussion, but please read the spec and do your own brainstorming before reading all our bad suggestions. 🙂

As always, send feedback to the (archived) public mailing list www-style@w3.org with the spec code ([css-cascade]) and your comment topic in the subject line. Alternatively, you can email one of the editors and ask them to forward your comment, send it to @csswg on Twitter, or post it as a comment below.

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