Bug 189363

Summary:	Implement css-values toggle() notation
Product:	WebKit	Reporter:	Simeon Vincent <svincent>
Component:	CSS	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Enhancement	CC:	bfulgham, bugs.webkit.org, koivisto, nicolas, sam, sebastianzartner, simon.fraser
Priority:	P2
Version:	WebKit Nightly Build
Hardware:	All
OS:	All

Description Simeon Vincent 2018-09-06 12:12:58 PDT

Please implement the CSS Values specification's Toggle notation as defined in CSS Values 4 (working draft) https://drafts.csswg.org/css-values-4/#toggle-notation. The following summary and example come form that document:

The toggle() expression allows descendant elements to cycle over a list of values instead of inheriting the same value.

The following example makes <em> elements italic in general, but makes them normal if they’re inside something that’s italic:

> em { font-style: toggle(italic, normal); }

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Issues in other browser vendor bug trackers

https://bugs.chromium.org/p/chromium/issues/detail?id=715070
https://bugzilla.mozilla.org/show_bug.cgi?id=363250

Comment 1 Brent Fulgham 2022-07-01 16:59:00 PDT

This doesn't appear to be on track to be implemented by any other browsers at present.