27566 2014-12-11 05:26:20 +0000 Should transform-style: preserve3d create containing block? 2015-08-20 03:59:59 +0000 1 1 1 Unclassified CSS Transforms unspecified PC All RESOLVED FIXED P2 normal --- 1 smfr smfr ayg cmarrin dino dschulze eoconnor smfr public-css-bugzilla oldest_to_newest 116132 0 smfr 2014-12-11 05:26:20 +0000 The working draft says in the prose: A 3D rendering context is established by a a transformable element whose computed value for transform-style is preserve-3d, and which itself is not part of a 3D rendering context. Note that such an element is always a containing block. but we don't explicitly call this out under the transform-style property. WebKit/Blink have this behavior because of a bug. Firefox seems to have copied them or gone by the spec prose. Not sure what IE does. The new spec text doesn't require that preserve-3d create containing block. I don't think it should. 116133 1 1557 smfr 2014-12-11 05:26:58 +0000 Created attachment 1557 Testcase 116162 2 smfr 2014-12-11 18:49:58 +0000 IE 11 does not treat it as containing block. 122680 3 smfr 2015-08-20 03:59:18 +0000 Mailing list consensus was that it should: https://lists.w3.org/Archives/Public/www-style/2015Jan/0545.html 122681 4 smfr 2015-08-20 03:59:59 +0000 The working draft now says "A value of "preserve-3d" establishes a stacking context, and a containing block.". 1557 2014-12-11 05:26:58 +0000 2014-12-11 05:26:58 +0000 Testcase preserve3d-is-containing-block-for-absolute.html text/html 617 smfr PCFET0NUWVBFIGh0bWw+Cgo8aHRtbD4KPGhlYWQ+CiAgICA8c3R5bGU+CiAgICAgICAgLmNvbnRh aW5lciB7CiAgICAgICAgICAgIG1hcmdpbjogNTBweDsKICAgICAgICAgICAgaGVpZ2h0OiAxMDBw eDsKICAgICAgICAgICAgd2lkdGg6IDEwMHB4OwogICAgICAgICAgICBib3JkZXI6IDFweCBzb2xp ZCBibGFjazsKICAgICAgICAgICAgLXdlYmtpdC10cmFuc2Zvcm0tc3R5bGU6IHByZXNlcnZlLTNk OwogICAgICAgICAgICAtbW96LXRyYW5zZm9ybS1zdHlsZTogcHJlc2VydmUtM2Q7CiAgICAgICAg ICAgIHRyYW5zZm9ybS1zdHlsZTogcHJlc2VydmUtM2Q7CiAgICAgICAgfQogICAgICAgIC5ib3gg ewogICAgICAgICAgICBwb3NpdGlvbjogYWJzb2x1dGU7CiAgICAgICAgICAgIHRvcDogMDsKICAg ICAgICAgICAgbGVmdDogMDsKICAgICAgICAgICAgaGVpZ2h0OiAxMDAlOwogICAgICAgICAgICB3 aWR0aDogMTAwJTsKICAgICAgICAgICAgYmFja2dyb3VuZC1jb2xvcjogZ3JheTsKICAgICAgICB9 CiAgICA8L3N0eWxlPgo8L2hlYWQ+Cjxib2R5Pgo8ZGl2IGNsYXNzPSJjb250YWluZXIiPgogICAg PGRpdiBjbGFzcz0iYm94Ij48L2Rpdj4KPC9kaXY+CjwvYm9keT4KPC9odG1sPgo=