266901 2023-12-26 14:28:32 -0800 UA Stylesheet adds '1px' border top width for 'iframe' in fullscreen WPT test case 2025-02-06 23:45:35 -0800 1 1 1 Unclassified WebKit CSS WebKit Nightly Build Unspecified Unspecified RESOLVED DUPLICATE 249069 BrowserCompat, InRadar, WPTImpact P2 Normal --- 1 ahmad.saleem792 webkit-unassigned ntim webkit-bug-importer oldest_to_newest 2002029 0 ahmad.saleem792 2023-12-26 14:28:32 -0800 Hi Team, While looking into browser specific failures, I noticed that we are failing following Test Case: WPT Test Case: https://wpt.fyi/results/fullscreen/rendering/ua-style-iframe.html?label=master&label=experimental&aligned&q=fullscreen WPT Test Live Link: http://wpt.live/fullscreen/rendering/ua-style-iframe.html It fails in Safari (even WebKit ToT) with following: > assert_equals("1px", "0px", "fullscreen borderTopWidth style") I looked into 'fullscreen.css' and we have 'border: none' with !important as well. Similarly, I looked into presentational hints in 'HTMLIframeElement.cpp' and we don't have 1 px (like we had for HR in the past). I even tried to look into 'html.css' but couldn't find '1 px'. So I am just raising so we can track and fix this issue. Thanks! 2002031 1 ntim 2023-12-26 14:54:35 -0800 This seems more like a timing issue, WebKit might be updating styles later than the test expects, but the border-width is correct when you're in fullscreen. 2002615 2 webkit-bug-importer 2024-01-02 14:29:14 -0800 <rdar://problem/120386877> 2092709 3 ahmad.saleem792 2025-02-06 23:45:35 -0800 Fixed via - https://github.com/WebKit/WebKit/commit/cba51d14a79420eea435792f37f3e379bc523bb9#diff-1fd83580913d21fb150911a2a25d0b001c80556841e7cd098cdf46a008de4824 *** This bug has been marked as a duplicate of bug 249069 ***