147953 2015-08-12 14:09:47 -0700 Percentage padding of absolutely positioned element being calculated based on parent's content width instead of containing block. 2022-06-11 07:29:13 -0700 1 1 1 Unclassified WebKit CSS 528+ (Nightly build) Unspecified Unspecified RESOLVED CONFIGURATION CHANGED P2 Normal --- 1 keithjgrant webkit-unassigned ahmad.saleem792 ap rniwa simon.fraser zalan oldest_to_newest 1117064 0 keithjgrant 2015-08-12 14:09:47 -0700 Create a relatively-positioned container that has left/right padding. Inside that, create an absolutely-positioned element with left: 0 and right: 0, so its width equals the width of the container. Give the absolutely-positioned element a percentage based left and/or right padding, and that padding will be calculated based on the width of the container's content, rather than the width of the containing block. I've recreated the bug here: http://codepen.io/keithjgrant/pen/LVvbYZ The spec states the percentage is calculated with respect to the width of the containing block (http://www.w3.org/TR/css3-box/#the-padding). The containing block should be determined by the padding edge of the ancestor (http://www.w3.org/TR/css3-box/#the-padding). 1875349 1 ahmad.saleem792 2022-06-10 17:36:05 -0700 All browser match each other in the "codepen" test case. Tested using Safari 15.5 on macOS 12.4, Chrome Canary 104 and Firefox Nightly 103. Thanks! I think this got fixed along the lines and it can be marked as "RESOLVED CONFIGURATION CHANGED". Thanks!