tree dee86c1996f3b4c17eaf23135d38531873b4700b
parent 90fef76e999b85479cac871500ad82f0f0a686a2
author CanadaHonk <oj@oojmed.com> 1695219954 +0000
committer moz-wptsync-bot <wptsync@mozilla.com> 1695296665 +0100

Implement CSS attr() fallback

Implemented support for fallback values in CSS attr():
`attr(<attr-name>, <attr-fallback>)`

Full syntax supported as of this rev:
`[namespace? `|`]? ident [`,` fallback]?`

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

Also added a new WPT reftest for attr fallback without a type,
and some new attr serialization WPTs (namespace and fallback).

Differential Revision: https://phabricator.services.mozilla.com/D176801

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1448248
gecko-commit: a14395d9ad06c9f7462430341d4c7874020a58d0
gecko-reviewers: emilio