15679 2007-10-24 13:31:10 -0700 Fixed backgrounds should behave like 'scroll' inside transformed elements 2022-10-30 09:08:54 -0700 1 1 1 Unclassified WebKit Layout and Rendering 523.x (Safari 3) Mac OS X 10.4 RESOLVED FIXED BrowserCompat, InRadar P2 Normal --- 1 hyatt vitor.roriz karlcow mattwoodrow mstange ntim simon.fraser vitor.roriz webkit-bug-importer oldest_to_newest 59372 0 hyatt 2007-10-24 13:31:10 -0700 Fixed backgrounds should not be affected by the transform, but should always render as though offset from the viewport. 112717 1 28389 ken 2009-03-07 06:01:21 -0800 Created attachment 28389 simple example of problem 112718 2 ken 2009-03-07 06:02:16 -0800 Seeing this in nightly build, too: 530.1+ Have attached a pretty simple example file. There's WebKit "transform:" rules and everywhere "left:" rules in the CSS to demonstrate the problem. (The "everywhere" section is commented out by default.) 476576 3 simon.fraser 2011-10-01 08:39:27 -0700 Known issue. 900797 4 simon.fraser 2013-06-15 13:00:14 -0700 Spec <http://dev.w3.org/csswg/css-transforms/> now says: "Fixed backgrounds on the root element are affected by any transform specified for that element. For all other elements that are effected by a transform (i.e. have a transform applied to them, or to any of their ancestor elements), a value of ‘fixed’ for the ‘background-attachment’ property is treated as if it had a value of ‘scroll’. The computed value of ‘background-attachment’ is not affected." 1217959 5 mstange 2016-08-05 10:28:51 -0700 (In reply to comment #4) > Spec <http://dev.w3.org/csswg/css-transforms/> now says: > "Fixed backgrounds on the root element are affected by any transform > specified for that element. For all other elements that are effected by a > transform (i.e. have a transform applied to them, or to any of their > ancestor elements), a value of ‘fixed’ for the ‘background-attachment’ > property is treated as if it had a value of ‘scroll’. The computed value of > ‘background-attachment’ is not affected." We (Mozilla) have shipped this change in Firefox 48. IIRC Edge has also shipped it. 1892088 6 vitor.roriz 2022-08-17 16:36:55 -0700 Pull request: https://github.com/WebKit/WebKit/pull/3433 1898496 7 webkit-bug-importer 2022-09-14 10:49:36 -0700 <rdar://problem/99926239> 1899987 8 mattwoodrow 2022-09-20 18:31:09 -0700 *** Bug 245352 has been marked as a duplicate of this bug. *** 1899993 9 mattwoodrow 2022-09-20 18:58:19 -0700 Affected WPT: css/css-transforms/transform-fixed-bg-002.html - https://wpt.fyi/results/css/css-transforms/transform-fixed-bg-002.html?label=master&label=experimental&product=chrome&product=firefox&product=safari&aligned&view=interop&q=label%3Ainterop-2021-transforms css/css-transforms/transform-fixed-bg-004.html - https://wpt.fyi/results/css/css-transforms/transform-fixed-bg-004.html?label=master&label=experimental&product=chrome&product=firefox&product=safari&aligned&view=interop&q=label%3Ainterop-2021-transforms css/css-transforms/transform-fixed-bg-005.html - https://wpt.fyi/results/css/css-transforms/transform-fixed-bg-005.html?label=master&label=experimental&product=chrome&product=firefox&product=safari&aligned&view=interop&q=label%3Ainterop-2021-transforms css/css-transforms/transform-fixed-bg-006.html - https://wpt.fyi/results/css/css-transforms/transform-fixed-bg-006.html?label=master&label=experimental&product=chrome&product=firefox&product=safari&aligned&view=interop&q=label%3Ainterop-2021-transforms css/css-transforms/transform-fixed-bg-007.html - https://wpt.fyi/results/css/css-transforms/transform-fixed-bg-007.html?label=master&label=experimental&product=chrome&product=firefox&product=safari&aligned&view=interop&q=label%3Ainterop-2021-transforms 1902549 10 ews-feeder 2022-09-30 17:12:14 -0700 Committed 255055@main (eba490ba3cc4): <https://commits.webkit.org/255055@main> Reviewed commits have been landed. Closing PR #3433 and removing active labels. 1909232 11 ews-feeder 2022-10-30 09:08:54 -0700 Committed 252432.728@safari-7614-branch (a1d3edc00b16): <https://commits.webkit.org/252432.728@safari-7614-branch> Reviewed commits have been landed. Closing PR #171 and removing active labels. 28389 2009-03-07 06:01:21 -0800 2009-03-07 06:01:21 -0800 simple example of problem index.php text/html 2436 ken 77u/PCFET0NUWVBFIEhUTUwgUFVCTElDICItLy9XM0MvL0RURCBIVE1MIDQuMDEgVHJhbnNpdGlv bmFsLy9FTiIgImh0dHA6Ly93d3cudzMub3JnL1RSL2h0bWw0L2xvb3NlLmR0ZCI+CjxodG1sPgo8 aGVhZD4KPHRpdGxlPkZpeGVkIERpdiBFeHBlcmltZW50PC90aXRsZT4KPHN0eWxlIHR5cGU9InRl eHQvY3NzIj4KYm9keSB7CgltYXJnaW46IDA7CglwYWRkaW5nOiAwOwoJd2lkdGg6IDMyMHB4OwoJ aGVpZ2h0OiA0NjBweDsKCW92ZXJmbG93OiBoaWRkZW47Cglmb250OiAxNHB4LzEuMmVtIEhlbHZl dGljYSwgQXJpYWw7Cn0KZGl2IHsKCXdpZHRoOiAzMjBweDsKCWhlaWdodDogNDYwcHg7IC8qIGRl diBjb2RlIG9ubHkgKi8KCXBvc2l0aW9uOiBmaXhlZDsKCXRvcDogMDsKCWxlZnQ6IDMyMHB4OwoJ YmFja2dyb3VuZDogcmdiYSgyNTUsMjU1LDI1NSwwLjEpOwoJcGFkZGluZy10b3A6IDYwcHg7IC8q IGRldiBjb2RlIG9ubHkgKi8KCS13ZWJraXQtdHJhbnNpdGlvbi1wcm9wZXJ0eTogLXdlYmtpdC10 cmFuc2Zvcm07Cgktd2Via2l0LXRyYW5zaXRpb24tZHVyYXRpb246IDIwMG1zOwoJfQpkaXYjaGVh ZGVyIHsKCW1hcmdpbjogMDsKCXBhZGRpbmc6IDA7CglsZWZ0OiAwOwoJYmFja2dyb3VuZDogcmdi YSgxMDAsMTAwLDI1NSwwLjUpOwoJdGV4dC1hbGlnbjogY2VudGVyOwoJaGVpZ2h0OiA1MHB4Owp9 CgovKiB3ZWJraXQsIHRoZW9yZXRpY2FsbHksIGJ1dCB0cmFuc2Zvcm1zIGFyZSBtZXNzaW5nIHcv Zml4ZWQgcG9zaXRpb25pbmcgKi8KZGl2LnNob3dpbmcgewoJLXdlYmtpdC10cmFuc2Zvcm06IHRy YW5zbGF0ZSgtMzIwcHgsMCk7Cn0KZGl2LnBsYXllZCB7Cgktd2Via2l0LXRyYW5zZm9ybTogdHJh bnNsYXRlKC02NDBweCwwKTsKfQoKLyogd29ya3MgZXZlcnl3aGVyZSAKZGl2LnNob3dpbmcgewoJ bGVmdDogMHB4Owp9CmRpdi5wbGF5ZWQgewoJbGVmdDogLTMyMHB4Owp9ICovCgo8L3N0eWxlPgo8 c2NyaXB0IHR5cGU9InRleHQvamF2YXNjcmlwdCI+CgpmdW5jdGlvbiBnZXRBbmNlc3RvcihuZCwg bmROYW1lLCBudW0pIHsKLy8gVVNBR0U6IGdldEFuY2VzdG9yKHRoaXMucGFyZW50Tm9kZSwgIkRJ ViIsIDEpCglpZiAoIG5kLm5vZGVOYW1lID09IG5kTmFtZS50b1VwcGVyQ2FzZSgpICkgewoJCWlm ICggbnVtID09IDEgKSB7CgkJCXJldHVybiBuZDsKCQl9IGVsc2UgewoJCQlyZXR1cm4gZ2V0QW5j ZXN0b3IobmQucGFyZW50Tm9kZSwgbmROYW1lLCBudW0tMSkKCQl9Cgl9IGVsc2UgewoJCXJldHVy biBnZXRBbmNlc3RvcihuZC5wYXJlbnROb2RlLCBuZE5hbWUsIG51bSk7Cgl9Cn0KZnVuY3Rpb24g Z29CYWNrKGVsKSB7CgkvLyBUT0RPOiBzaG91bGQgcmV3cml0ZSwgYnV0IHRoaXMgd29ya3MKCWdl dEFuY2VzdG9yKGVsLnBhcmVudE5vZGUsICJESVYiLCAxKS5jbGFzc05hbWUgPSAnJzsKCWdldEFu Y2VzdG9yKGVsLnBhcmVudE5vZGUsICJESVYiLCAyKS5jbGFzc05hbWUgPSAnc2hvd2luZyc7Cgly ZXR1cm4gZmFsc2U7Cn0KZnVuY3Rpb24gZ29Gb3J3YXJkKHRoZVRhcmdldElkLCBlbCkgewoJZG9j dW1lbnQuZ2V0RWxlbWVudEJ5SWQodGhlVGFyZ2V0SWQpLmNsYXNzTmFtZT0nc2hvd2luZyc7Cgln ZXRBbmNlc3RvcihlbC5wYXJlbnROb2RlLCAiRElWIiwgMSkuY2xhc3NOYW1lID0gJ3BsYXllZCc7 CglyZXR1cm4gZmFsc2U7Cn0KCjwvc2NyaXB0Pgo8L2hlYWQ+Cjxib2R5PgoKPGRpdiBpZD0iaGVh ZGVyIj48IS0tIE1pbmltYWwgYml0IHRoYXQgYWx3YXlzIHN0YXlzIG9uIHRvcCAtLT4KCTxwPk1v bmtleTwvcD4KPC9kaXY+Cgo8ZGl2IGlkPSJjb250ZW50IiBjbGFzcz0ic2hvd2luZyI+Cgk8aDE+ dG9wPC9oMT4KCTx1bD4KCQk8bGk+PGEgaHJlZj0iIyIgb25jbGljaz0iZ29Gb3J3YXJkKCdmaXJz dCcsIHRoaXMpIj50b3A6Zmlyc3Q8L2E+PC9saT4KCQk8bGk+dG9wOnNlY29uZDwvbGk+CgkJPGxp PnRvcDp0aGlyZDwvbGk+Cgk8L3VsPgoJPGRpdiBpZD0iZmlyc3QiPgoJCTxhIGhyZWY9IiMiIG9u Y2xpY2s9ImdvQmFjayh0aGlzKSI+QmFjazwvYT4KCQk8cD50b3A6Zmlyc3Q8L3A+CgkJPHVsPgoJ CQk8bGk+PGEgaHJlZj0iIyIgb25jbGljaz0iZ29Gb3J3YXJkKCdmaXJzdEEnLCB0aGlzKSI+dG9w OmZpcnN0OmE8L2E+PC9saT4KCQkJPGxpPnRvcDpzZWNvbmQ8L2xpPgoJCQk8bGk+dG9wOnRoaXJk PC9saT4KCQk8L3VsPgoJCTxkaXYgaWQ9ImZpcnN0QSI+CgkJCTxwPnRvcDpmaXJzdDphLi4uIG9u bHkgb25lIGNoaWxkIGluIGhlcmUsIGFuZCB5b3UgY2FuIGdldCBhdCBpdCA8YSBocmVmPSIjIiBv bmNsaWNrPSJnb0ZvcndhcmQoJ2ZpcnN0QTEnLCB0aGlzKSI+aGVyZTwvYT4uPC9wPgoJCTwvZGl2 PgoJCTxkaXYgaWQ9ImZpcnN0QTEiPjxwPnRvcDpmaXJzdDphOjEgdGhpcyBpcyB0aGUgY2hpbGQh PC9wPjwvZGl2PgoJPC9kaXY+CjwvZGl2PgoKPC9ib2R5Pgo8L2h0bWw+