CSS advanced attr() function

[tursunova]

WebKittens

No response

Title of the proposal

CSS advanced attr() function

URL to the spec

https://drafts.csswg.org/css-values-5/#attr-notation

URL to the spec's repository

https://github.com/w3c/csswg-drafts/tree/main/css-values-5

Issue Tracker URL

No response

Explainer URL

https://github.com/tursunova/web-platform-explainer/blob/main/advanced-attr-explainer.md

TAG Design Review URL

w3ctag/design-reviews#513

Mozilla standards-positions issue URL

mozilla/standards-positions#1143

WebKit Bugzilla URL

https://bugs.webkit.org/show_bug.cgi?id=26609

Radar URL

No response

Description

The augmentation to attr() specified in CSS Level 5, which allows types besides <string> and usage in all CSS properties (besides pseudo-element content).