1 files changed, 3 insertions(+), 0 deletions(-)

M src/Data/CSS/Preprocessor/PsuedoClasses.hs

@@ 34,5 34,8 @@ lowerSelector rewrites (Sibling sib sel') = Sibling sib $ lowerSelector' rewrite
 lowerSelector' :: HashMap Text [Token] -> [SimpleSelector] -> [SimpleSelector]
 lowerSelector' rewrites (Psuedoclass name []:sels)
     | Just value <- name `HM.lookup` rewrites = Psuedoclass "where" value : lowerSelector' rewrites sels
+lowerSelector' rewrites (Psuedoclass name [arg]:sels)
+    | Just value <- name `HM.lookup` rewrites =
+        Psuedoclass "where" [if a == Ident "_" then arg else a | a <- value] : lowerSelector' rewrites sels
 lowerSelector' rewrites (sel:sels) = sel : lowerSelector' rewrites sels
 lowerSelector' _ [] = []