187697 2018-07-16 07:56:41 -0700 CSS.supports is incorrect for 'scroll-snap-type' 2020-10-15 07:26:35 -0700 1 1 1 Unclassified WebKit CSS Safari 11 Unspecified Unspecified RESOLVED DUPLICATE 210468 P2 Normal --- 1 majidvp webkit-unassigned mrobinson wenson_hsieh oldest_to_newest 1442380 0 majidvp 2018-07-16 07:56:41 -0700 `CSS.supports('scroll-snap-type: mandatory')` returns true but it should be false. CSS Scroll Snap [1] which is supported by Safari require 'scroll-snap-type' to have the following syntax value. none | [ x | y | block | inline | both ] [ mandatory | proximity ]? So the above should return 'false'. This is particularly problematic since the buggy syntax maps to the deprecated css-snap-points spec so it can cause confusion if someone tries to use it for feature detection between old and new specification. [1] https://drafts.csswg.org/css-scroll-snap/#scroll-snap-type 1698099 1 mrobinson 2020-10-15 07:26:35 -0700 *** This bug has been marked as a duplicate of bug 210468 ***