240341 2022-05-12 06:23:22 -0700 Turn legacy properties that share a computed style into aliases or shorthands 2024-10-22 14:18:44 -0700 1 1 1 Unclassified WebKit CSS WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 104805 166782 197656 239808 243562 1 obrufau webkit-unassigned ntim webkit-bug-importer oldest_to_newest 1868373 0 obrufau 2022-05-12 06:23:22 -0700 Currently, there are 8 pairs of properties that share a computed style: * background-clip, -webkit-background-clip * background-origin, -webkit-background-origin * background-size, -webkit-background-size * box-shadow, -webkit-box-shadow * mask-clip, -webkit-mask-clip * mask-composite, -webkit-mask-composite * mask-mode, -webkit-mask-source-type * text-combine-upright, -webkit-text-combine This is a non-standard hack. CSS Cascade defines 2 standard ways: https://www.w3.org/TR/css-cascade-5/#aliasing * legacy name aliases, for properties with the same exact syntax * legacy shorthands, for properties with different syntax So the -webkit- properties above should be turned into aliases or shorthands. The current hack is more likely to break things, e.g. revert-layer was broken before bug 238125, and CSSOM is still broken (bug 238874). 1868423 1 ntim 2022-05-12 08:34:26 -0700 Bug 104805 is an example of legacy shorthand. 1870354 2 webkit-bug-importer 2022-05-19 06:24:13 -0700 <rdar://problem/93572921> 2069870 3 obrufau 2024-10-22 14:18:44 -0700 This has been done, see bug 277623 comment 0 > The "related-property" mechanism has no clients left