RESOLVED DUPLICATE of bug 210468 187697
CSS.supports is incorrect for 'scroll-snap-type' 
https://bugs.webkit.org/show_bug.cgi?id=187697
Summary CSS.supports is incorrect for 'scroll-snap-type'
Majid Valipour
Reported 2018-07-16 07:56:41 PDT
`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
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Martin Robinson
Comment 1 2020-10-15 07:26:35 PDT
*** This bug has been marked as a duplicate of bug 210468 ***
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