NEW299921
-epub-* properties shouldn't create webkit-cased IDL attributes 
https://bugs.webkit.org/show_bug.cgi?id=299921
Summary -epub-* properties shouldn't create webkit-cased IDL attributes
Karl Dubost
Reported 2025-09-30 17:57:06 PDT
The initial fix for this test was done in Bug 223141 There are still 19 failures to fix. http://wpt.live/css/css-conditional/js/CSS-supports-CSSStyleDeclaration.html http://wpt.fyi/css/css-conditional/js/CSS-supports-CSSStyleDeclaration.html 19 Fail including 9 about the prefix -epub-* which is converted as Epub by the test script. Fail -epub-caption-side: _webkit_cased_attribute must only exist for -webkit- assert_false: expected false got true Fail -epub-text-combine: _webkit_cased_attribute must only exist for -webkit- assert_false: expected false got true Fail -epub-text-emphasis: _webkit_cased_attribute must only exist for -webkit- assert_false: expected false got true Fail -epub-text-emphasis-color: _webkit_cased_attribute must only exist for -webkit- assert_false: expected false got true Fail -epub-text-emphasis-style: _webkit_cased_attribute must only exist for -webkit- assert_false: expected false got true Fail -epub-text-orientation: _webkit_cased_attribute must only exist for -webkit- assert_false: expected false got true Fail -epub-text-transform: _webkit_cased_attribute must only exist for -webkit- assert_false: expected false got true Fail -epub-word-break: _webkit_cased_attribute must only exist for -webkit- assert_false: expected false got true Fail -epub-writing-mode: _webkit_cased_attribute must only exist for -webkit- assert_false: expected false got true Fail font-display: _camel_cased_attribute v. CSS.supports assert_equals: expected true but got false Fail font-display: _dashed_attribute v. CSS.supports assert_equals: expected true but got false Fail inherits: _camel_cased_attribute v. CSS.supports assert_equals: expected true but got false Fail initial-value: _camel_cased_attribute v. CSS.supports assert_equals: expected true but got false Fail initial-value: _dashed_attribute v. CSS.supports assert_equals: expected true but got false Fail size: _camel_cased_attribute v. CSS.supports assert_equals: expected true but got false Fail src: _camel_cased_attribute v. CSS.supports assert_equals: expected true but got false Fail syntax: _camel_cased_attribute v. CSS.supports assert_equals: expected true but got false Fail unicode-range: _camel_cased_attribute v. CSS.supports assert_equals: expected true but got false Fail unicode-range: _dashed_attribute v. CSS.supports assert_equals: expected true but got false Firefox PASS on all tests
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Radar WebKit Bug Importer
Comment 1 2025-10-07 17:58:11 PDT
<rdar://problem/162161339>
Radar WebKit Bug Importer
Comment 2 2025-10-07 17:58:12 PDT
<rdar://problem/162161344>
Karl Dubost
Comment 3 2025-10-07 18:29:33 PDT
<rdar://problem/162161339>
Sam Sneddon [:gsnedders]
Comment 4 2025-10-09 18:09:44 PDT
> The initial fix for this test was done in Bug 223141 That was one of three bugs; that we weren't consistently checking runtime feature flags. (Arguably that's many more bugs, because each difference is arguably a separate bug!) > There are still 19 failures to fix. These are two completely different failures which should be tracked separately: The first is about -epub- properties appearing as EpubXXX, which is commented as such in the code: https://github.com/WebKit/WebKit/blob/97d0e362516b8739ab5739302541f7d7b150cbc8/Source/WebCore/css/scripts/process-css-properties.py#L3960-L3972 The second is about properties v. descriptors — historically WebKit (and Blink, given its shared origins) have had a single interface containing all properties and descriptors. Bug 238273 tracks that. So let's use this bug for the first of these.
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