RESOLVED CONFIGURATION CHANGED 241433
Make CSS custom properties that are invalid at computed value time guaranteed-invalid 
https://bugs.webkit.org/show_bug.cgi?id=241433
Summary Make CSS custom properties that are invalid at computed value time guaranteed...
Shaw Jia
Reported 2022-06-08 13:30:19 PDT
Same as this Firefox bug: https://phabricator.services.mozilla.com/D116460 Also codepen demo: https://codepen.io/Miragecraft/pen/XWaLxNb In short, when assigning an invalid CSS custom property to another custom property, it makes the final value unset (which means "inherit" for custom properties) instead of initial.
Attachments
Add attachment proposed patch, testcase, etc.
Bruno Stasse
Comment 1 2022-06-09 05:35:08 PDT
WebKit's behaviour now differs from both Gecko's and Blink's, causing an interoperability issue.
Radar WebKit Bug Importer
Comment 2 2022-06-15 13:31:13 PDT
<rdar://problem/95234259>
Philip Jägenstedt
Comment 3 2022-11-10 03:08:51 PST
Here's the relevant spec change: https://github.com/w3c/csswg-drafts/issues/5370 https://github.com/w3c/csswg-drafts/pull/6006 And Safari-only failures in WPT: https://wpt.fyi/results/css/css-variables/variables-substitute-guaranteed-invalid.html?run_id=6317090990981120&run_id=5097315145089024&run_id=5104235344035840&run_id=5084375415259136 The reason I noticed is because this issue was specifically called out in a freeform text comment from State of CSS 2022.
Antti Koivisto
Comment 4 2023-02-15 09:02:11 PST
Is now working.
Antti Koivisto
Comment 5 2023-02-15 09:05:05 PST
That is css/css-variables/variables-substitute-guaranteed-invalid.html WPT is passing.
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