194486 2019-02-10 16:37:46 -0800 [css-env] WebKit exposes a number of non-standard built-in env() variables 2023-11-28 14:58:13 -0800 1 1 1 Unclassified WebKit CSS Safari 12 All All NEW BrowserCompat, InRadar P2 Major --- 1 MatsPalmgren_bugz webkit-unassigned ahmad.saleem792 ap bfulgham dino eric.carlson gsnedders jer.noble jonlee karlcow ntim rniwa simon.fraser thorton webkit-bug-importer zalan oldest_to_newest 1504758 0 361651 MatsPalmgren_bugz 2019-02-10 16:37:46 -0800 Created attachment 361651 Testcase It appears that WebKit exposes a number of built-in env() variables[1] that are not in the css-env specification[2]. The specification says that any UA that implements env() has a mandatory requirement to not expose additional variables to the web. "Additional UA-defined environment variables *must not* be supported unless/until they are added to this list." The attached testcase fails in Safari 12.0.1. This makes it a non-compliant UA. Please unship these variables, or write up a specification for what they do and bring it to the CSSWG for standardization. Thanks. [1] https://github.com/WebKit/webkit/blob/master/Source/WebCore/dom/ConstantPropertyMap.cpp#L57-L61 [2] https://drafts.csswg.org/css-env-1/ 1505458 1 webkit-bug-importer 2019-02-12 15:57:50 -0800 <rdar://problem/48019166> 1505462 2 thorton 2019-02-12 16:01:03 -0800 This bug is referring to the fullscreen constants. 1505475 3 dino 2019-02-12 16:13:50 -0800 We should submit these to a standards body. Although, I'm not sure anyone is using them. 1892742 4 ahmad.saleem792 2022-08-20 17:20:57 -0700 I am able to reproduce this bug using attached test case on Safari 15.6.1 and Safari Technology Preview 151 and it just show 'x' but not within box etc., while all other browsers (Chrome Canary 106 and Firefox Nightly 105) show "green rectangle" around 'x'. Thanks! 361651 2019-02-10 16:37:46 -0800 2019-02-10 16:37:46 -0800 Testcase env.html text/html 173 MatsPalmgren_bugz PHN0eWxlPgpkaXYgewogIHdpZHRoOiBlbnYoZnVsbHNjcmVlbi1pbnNldC10b3AsIDEwMHB4KTsK ICBib3JkZXI6IDFweCBzb2xpZDsKICBiYWNrZ3JvdW5kOiBncmVlbjsKfQo8L3N0eWxlPgo8cHJl PlBBU1MgaWYgdGhlIGJveCBiZWxvdyBoYXMgMTAwcHggd2lkdGguPC9wcmU+CjxkaXY+eDwvZGl2 Pgo=