190580 2018-10-15 08:21:26 -0700 display:unset does not stop an element from creating a new formatting context for sticky children. 2021-08-25 03:55:36 -0700 1 1 1 Unclassified WebKit CSS Safari 14 Unspecified Unspecified RESOLVED DUPLICATE 224415 InRadar P2 Normal --- 1 dan webkit-unassigned dan mrobinson ntim simon.fraser webkit-bug-importer zalan oldest_to_newest 1469220 0 352321 dan 2018-10-15 08:21:26 -0700 Created attachment 352321 testcase The `display: unset` rule should stop any element where it is applied from creating a new containing block. This bug was found by nesting a position sticky inside a plain div with a single `display:unset` rule. Expected behaviour - the sticky element should take its containing block from body (being the closest block formatting context) Actual behaviour - The sticky element takes its containing block from the parent div Steps to reproduce: scroll down and observe that sticky element does not stick. Works as expected in most recent Firefox and Chrome. 1470194 1 dan 2018-10-17 10:54:16 -0700 I've played a bit more, and `display: unset` works as expected for other child elements - seems like `position: -webkit-sticky` is the only thing that's misbehaving. 1470211 2 webkit-bug-importer 2018-10-17 11:22:30 -0700 <rdar://problem/45344773> 1758368 3 dan 2021-05-09 14:11:36 -0700 Still present in Safari 14, description updated. 1787134 4 mrobinson 2021-08-25 03:55:36 -0700 This should be fixed now. *** This bug has been marked as a duplicate of bug 224415 *** 352321 2018-10-15 08:21:26 -0700 2018-10-15 08:21:26 -0700 testcase sticky.html text/html 992 dan PCFkb2N0eXBlIGh0bWw+CjxodG1sPgogIDxoZWFkPgogICAgPHRpdGxlPmJ1ZzwvdGl0bGU+CiAg ICA8c3R5bGU+CiAgICAgICAgCiAgICAgICAgLmZvbyB7CiAgICAgICAgICAgIGRpc3BsYXk6IHVu c2V0OyAKICAgICAgICB9CiAgICAgICAgbmF2IHsKICAgICAgICAgICAgcG9zaXRpb246IC13ZWJr aXQtc3RpY2t5OwogICAgICAgICAgICBwb3NpdGlvbjogc3RpY2t5OwogICAgICAgICAgICBwYWRk aW5nOiAxcmVtOwogICAgICAgICAgICBiYWNrZ3JvdW5kOiBncmVlbjsKICAgICAgICAgICAgdG9w OiAwOwogICAgICAgIH0KICAgICAgICAuaW5uZXIgewogICAgICAgICAgICBtYXgtd2lkdGg6IDEy MDBweDsKICAgICAgICAgICAgbWFyZ2luOiAwIGF1dG87CiAgICAgICAgfQogICAgICAgIC5ibG9j a3MgewogICAgICAgICAgICBtYXgtd2lkdGg6IDEyMDBweDsKICAgICAgICAgICAgbWFyZ2luOiAw IGF1dG87CiAgICAgICAgfQogICAgICAgIC5ibG9ja3MgZGl2IHsKICAgICAgICAgICAgd2lkdGg6 IDEwMCU7CiAgICAgICAgICAgIGhlaWdodDogODAwcHg7CiAgICAgICAgICAgIGJhY2tncm91bmQ6 IGJsdWU7CiAgICAgICAgICAgIG1hcmdpbi1ib3R0b206IDFyZW07CiAgICAgICAgfQogICAgPC9z dHlsZT4KICA8L2hlYWQ+CiAgPGJvZHk+CiAgICA8ZGl2IGNsYXNzPSJmb28iPgogICAgICA8ZGl2 IGNsYXNzPSJpbm5lciI+CiAgICAgICAgPHNwYW4+YmFubmVyPC9zcGFuPgogICAgICA8L2Rpdj4K ICAgICAgPG5hdj4KICAgICAgICA8ZGl2IGNsYXNzPSJpbm5lciI+CiAgICAgICAgPHNwYW4+MTwv c3Bhbj4KICAgICAgICA8c3Bhbj4yPC9zcGFuPgogICAgICAgIDwvZGl2PgogICAgICA8L25hdj4K ICAgIDwvZGl2PgogICAgPGRpdiBjbGFzcz0iYmxvY2tzIj4KICAgICAgPGRpdj48L2Rpdj4KICAg ICAgPGRpdj48L2Rpdj4KICAgICAgPGRpdj48L2Rpdj4KICAgICAgPGRpdj48L2Rpdj4KICAgIDwv ZGl2PgogIDwvYm9keT4KPC9odG1sPgo=