CSS advanced attr() function

[tursunova]

Request for Mozilla Position on an Emerging Web Specification

• Specification title: CSS Values and Units Module Level 5
• Specification or proposal URL (if available): https://drafts.csswg.org/css-values-5/#attr-notation
• Explainer URL (if available): https://github.com/tursunova/web-platform-explainer/blob/main/advanced-attr-explainer.md
• Proposal author(s) (@-mention GitHub accounts): @tursunova
• Caniuse.com URL (optional):
• Bugzilla URL (optional): https://bugzilla.mozilla.org/show_bug.cgi?id=435426
• Mozillians who can provide input (optional): @emilio
• WebKit standards-position: CSS advanced attr() function WebKit/standards-positions#435

Other information

We're planning to ship this in Chrome soon, link to Chrome Status entry.

[o-t-w]

The Chrome Status entry lists "no status" from web developers. Judging from previous Interop feedback, this is a highly desired feature for developers.

It got 73 thumbs up reactions in Interop 2024, making it one of the most highly voted features in the history of Interop.