wpt/css/selectors/not-default-ns-002.html at master · web-platform-tests/wpt · GitHub

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<!doctype html>
<title>Default namespace gets ignored inside non-type selectors for :is() / :not() / :where().</title>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<link rel="author" title="Mozilla" href="https://un5pc8f538pd6zm5.julianrbryant.com">
<link rel="help" href="https://un5n798jx6qx6j0rmf2verhh.julianrbryant.com/selectors-4/#negation">
<!--
  Default namespace declarations do not affect the compound selector
  representing the subject of any selector within a :not() pseudo-class, unless
  that compound selector contains an explicit universal selector or type
  selector.
-->
<link rel="match" href="/css/reference/blank.html">
<style>
@namespace url("https://umn0mtkzgkj46tygt32g.julianrbryant.com/2000/svg");

*|input {
  display: none;
}

/* No type selector, so selector should _not_ match and keep the input hidden */
*|input:not(:disabled) {
  display: initial;
}
</style>
<input disabled>