271136 2024-03-17 20:34:53 -0700 [css-cascade] revert-layer does not rollback unregistered custom properties 2025-07-02 13:11:46 -0700 1 1 1 Unclassified WebKit CSS Safari 17 All All RESOLVED CONFIGURATION CHANGED BrowserCompat, HasReduction, InRadar P2 Normal --- 1 nathan webkit-unassigned ahmad.saleem792 koivisto m_dubet nathan ntim obrufau webkit-bug-importer zalan oldest_to_newest 2021689 0 470414 nathan 2024-03-17 20:34:53 -0700 Created attachment 470414 Test reduction for custom properties and revert-layer I expect that using the `revert-layer` keyword for a custom property would roll it back to the previous layer’s specified value, however, for unregistered custom properties it seems to ignore any specified values and computes as nothing. Registered custom properties seem to work as expected whether or not they have an initial value. Chrome and Firefox both work as expected. 2023555 1 webkit-bug-importer 2024-03-24 20:35:45 -0700 <rdar://problem/125332655> 2025362 2 ahmad.saleem792 2024-04-02 05:47:54 -0700 It is reproducible in Safari Technology Preview 191, while Chrome Canary 125 and Firefox Nightly 126 match each other and do show 'Unregistered custom property' in 'DeepPink' like other while Safari show it in 'White'. 2127369 3 ahmad.saleem792 2025-07-02 13:11:46 -0700 Seems to work fine now on ToT (296922@main) - lists are now DeepPink. Might be combination of fixes by Antti today. https://commits.webkit.org/296909@main & https://github.com/WebKit/WebKit/commit/ca01e51f31208ce0654b7e67b01e4d64241fcff0 470414 2024-03-17 20:34:53 -0700 2024-03-17 20:34:53 -0700 Test reduction for custom properties and revert-layer revert-layer-custom-properties.html text/html 1979 nathan PCFET0NUWVBFIGh0bWw+CjxodG1sIGxhbmc9ImVuLWNhIj4KICA8aGVhZD4KICAgIDxtZXRhIGNo YXJzZXQ9InV0Zi04Ij4KICAgIDxtZXRhIG5hbWU9InZpZXdwb3J0IiBjb250ZW50PSJ3aWR0aD1k ZXZpY2Utd2lkdGgsIGluaXRpYWwtc2NhbGU9MSI+CiAgICA8dGl0bGU+cmV2ZXJ0LWxheWVyIGFu ZCBjdXN0b20gcHJvcGVydGllcyByZWR1Y2VkIHRlc3QgY2FzZTwvdGl0bGU+CiAgICA8bWV0YSBu YW1lPSJkZXNjcmlwdGlvbiIgY29udGVudD0iQSByZWR1Y3Rpb24gZm9yIGEgV2ViS2l0IGJ1ZyBm b3VuZCBNYXJjaCAxLCAyMDI0LiI+CiAgICA8c3R5bGU+QGxheWVyIGZpcnN0LCBzZWNvbmQ7CgpA cHJvcGVydHkgLS1yZWdpc3RlcmVkLXdpdGgtaW5pdGlhbC12YWx1ZSB7CglzeW50YXg6ICI8Y29s b3I+IHwgbm9uZSI7Cglpbmhlcml0czogdHJ1ZTsKCWluaXRpYWwtdmFsdWU6IERvZGdlckJsdWU7 Cn0KCkBwcm9wZXJ0eSAtLXJlZ2lzdGVyZWQtd2l0aG91dC1pbml0aWFsLXZhbHVlIHsKCXN5bnRh eDogIjxjb2xvcj4gfCBub25lIjsKCWluaGVyaXRzOiB0cnVlOwoJaW5pdGlhbC12YWx1ZTogbm9u ZTsKfQoKQGxheWVyIGZpcnN0IHsKCTpyb290IHsKCQktLXVucmVnaXN0ZXJlZDogRGVlcFBpbms7 CgkJLS1yZWdpc3RlcmVkLXdpdGgtaW5pdGlhbC12YWx1ZTogRGVlcFBpbms7CgkJLS1yZWdpc3Rl cmVkLXdpdGhvdXQtaW5pdGlhbC12YWx1ZTogRGVlcFBpbms7Cgl9Cn0KCkBsYXllciBzZWNvbmQg ewoJOnJvb3QgewoJCS0tdW5yZWdpc3RlcmVkOiByZXZlcnQtbGF5ZXI7CgkJLS1yZWdpc3RlcmVk LXdpdGgtaW5pdGlhbC12YWx1ZTogcmV2ZXJ0LWxheWVyOwoJCS0tcmVnaXN0ZXJlZC13aXRob3V0 LWluaXRpYWwtdmFsdWU6IHJldmVydC1sYXllcjsKCX0KfQoKLnVucmVnaXN0ZXJlZCB7Cgljb2xv cjogdmFyKC0tdW5yZWdpc3RlcmVkKTsKfQoKLnJlZ2lzdGVyZWQtd2l0aC1pbml0aWFsLXZhbHVl IHsKCWNvbG9yOiB2YXIoLS1yZWdpc3RlcmVkLXdpdGgtaW5pdGlhbC12YWx1ZSk7Cn0KCi5yZWdp c3RlcmVkLXdpdGhvdXQtaW5pdGlhbC12YWx1ZSB7Cgljb2xvcjogdmFyKC0tcmVnaXN0ZXJlZC13 aXRob3V0LWluaXRpYWwtdmFsdWUpOwp9CgoKLyogRm9yIHByZXNlbnRhdGlvbiBvbmx5Ki8KCjpy b290IHsKCWNvbG9yLXNjaGVtZTogZGFyayBsaWdodDsKCWZvbnQtZmFtaWx5OiBzeXN0ZW0tdWk7 CglsaW5lLWhlaWdodDogMS41Owp9CgpoMSB7CglsaW5lLWhlaWdodDogMS4yOwp9CgphIHsKCWNv bG9yOiBEZWVwUGluazsKfQo8L3N0eWxlPgogICAgPHNjcmlwdCB0eXBlPSJtb2R1bGUiPjwvc2Ny aXB0PgogIDwvaGVhZD4KICA8Ym9keT4KPGgxPjxjb2RlPnJldmVydC1sYXllcjwvY29kZT4gYW5k IGN1c3RvbSBwcm9wZXJ0aWVzPC9oMT4KPHA+PGEgaHJlZj0iaHR0cHM6Ly93d3cudzMub3JnL1RS L2Nzcy1jYXNjYWRlLTUvI3JldmVydC1sYXllciI+PGNvZGU+cmV2ZXJ0LWxheWVyPC9jb2RlPjwv YT4gc2hvdWxkIHJldmVydCBhIHByb3BlcnR54oCZcyBjYXNjYWRlZCB2YWx1ZSB0byB0aGUgcHJl dmlvdXMgbGF5ZXLigJlzIHNwZWNpZmllZCB2YWx1ZS4gVGhlIGZvbGxvd2luZyBsaXN0IGl0ZW1z IHNob3VsZCBiZSA8Y29kZSBzdHlsZT0iY29sb3I6IERlZXBQaW5rIj5EZWVwUGluazwvY29kZT4g aWYgdGhleSBhcmUgY29ycmVjdGx5IGRvaW5nIHRoaXMuPC9wPgo8b2w+CiAgPGxpIGNsYXNzPSJ1 bnJlZ2lzdGVyZWQiPlVucmVnaXN0ZXJlZCBjdXN0b20gcHJvcGVydHk8L2xpPgogIDxsaSBjbGFz cz0icmVnaXN0ZXJlZC13aXRoLWluaXRpYWwtdmFsdWUiPlJlZ2lzdGVyZWQgY3VzdG9tIHByb3Bl cnR5IHdpdGggaW5pdGlhbCB2YWx1ZS48L2xpPgogIDxsaSBjbGFzcz0icmVnaXN0ZXJlZC13aXRo b3V0LWluaXRpYWwtdmFsdWUiPlJlZ2lzdGVyZWQgY3VzdG9tIHByb3BlcnR5IHdpdGhvdXQgaW5p dGlhbCB2YWx1ZS48L2xpPgo8L29sPgogIDwvYm9keT4KPC9odG1sPgo=