304156 2025-12-14 20:07:36 -0800 Fix `column-rule-width` parsing and remove old border style rules 2026-01-05 11:08:15 -0800 1 1 1 Unclassified WebKit CSS WebKit Nightly Build Unspecified Unspecified RESOLVED DUPLICATE 304940 BrowserCompat, EasyFix, GoodFirstBug, InRadar, WPTImpact P2 Normal --- 1 ahmad.saleem792 webkit-unassigned koivisto taher_ali webkit-bug-importer oldest_to_newest 2165807 0 ahmad.saleem792 2025-12-14 20:07:36 -0800 Hi Team While looking into browser specific failures, I noticed that we fail following WPT: WPT Test Case: https://wpt.fyi/results/css/css-multicol/parsing/column-rule-width-computed.html?label=master&label=experimental&aligned&q=column-rule-width WPT Test Case Live Link: http://wpt.live/css/css-multicol/parsing/column-rule-width-computed.html I already synced WPT here - https://github.com/WebKit/WebKit/pull/55348 Failing sub-test - column-rule-width is as specified when column-rule-style is none or hidden ____ WebKit Source: https://github.com/WebKit/WebKit/blob/0a7cb8948b067fa78de53b601b94552e112c7ca2/Source/WebCore/rendering/style/StyleMultiColData.cpp#L90 ``` Style::LineWidth StyleMultiColData::columnRuleWidth() const { if (columnRule.style() == BorderStyle::None || columnRule.style() == BorderStyle::Hidden) return Style::LineWidth { 0_css_px }; return columnRule.width(); } ``` Changing it to: ``` Style::LineWidth StyleMultiColData::columnRuleWidth() const { return columnRule.width(); } ``` It fixes the test case. Just raising, so we can fix it. Thanks! 2167722 1 webkit-bug-importer 2025-12-21 20:08:14 -0800 <rdar://problem/166996498> 2169413 2 ahmad.saleem792 2026-01-05 11:08:15 -0800 *** This bug has been marked as a duplicate of bug 304940 ***