Discovered last week: @.supports (transition-property: nonsense) returns true in Chrome. But Chromium 34 and below return false.
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Replying to @ppk
If the nonsense is an identifier, it's supposed to return true.

Jul 5, 2016 · 11:45 PM UTC

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Replying to @davidbaron @ppk
Yup. drafts.csswg.org/css-transit… defines it as taking <custom-ident>, which is *anything* (for future-compat).
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