Follow updates on WD-selectors-4-20181121

See also: https://www.w3.org/TR/2018/WD-selectors-4-20181121/

Author: hail2u

after/syntax/css/selectors-4.vim

@@ -7,4 +7,4 @@ syn match cssPseudoClassId contained "\<\(in\|out-of\)-range\>"
 syn match cssPseudoClassId contained "\<user-invalid\>"
 syn match cssPseudoClassId contained "\<target-within\>"
 syn match cssPseudoClassId contained "\<focus-\(within\|visible\)\>"
-syn region cssPseudoClassLang matchgroup=cssPseudoClassId start=":\(matches\|dir\|local-link\|current\|nth\(-last\)\=-col\|has\|drop\)(" end=")" oneline
+syn region cssPseudoClassLang matchgroup=cssPseudoClassId start=":\(is\|dir\|local-link\|current\|nth\(-last\)\=-col\|has\|where\)(" end=")" oneline

test/test.css

@@ -758,7 +758,7 @@ mask {
 .selectors-4:in-range,
 .selectors-4:out-of-range,
 .selectors-4:user-invalid,
-.selectors-4:matches(:hover, :focus),
+.selectors-4:is(:hover, :focus),
 .selectors-4:dir(ltr),
 .selectors-4:local-link(0),
 .selectors-4:current(p, li, dt, dd),
@@ -770,7 +770,7 @@ mask {
 .selectors-4:playing,
 .selectors-4:paused,
 .selectors-4:has(> img),
-.selectors-4:drop(active) {
+.selectors-4:where(:not(:hover)) {
   display: auto;
 }