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chromium/third_party/blink/web_tests/external/wpt/css/selectors/has-style-sharing-002.html 

<!DOCTYPE html>
<link rel="author" title="David Shin" href="mailto:[email protected]">
<link rel="help" href="https://drafts.csswg.org/selectors-4/#relational">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1793012">
<link rel="match" href="has-style-sharing-002-ref.html">
<meta name="assert" content="Ensure that style sharing optimizations do not interfere with :has() selector matching.">
<style>
div {
  background: blue;
  padding: 1em;
  margin: 1em;
}

:has(> span) {
  background: green;
}

span {
  display: inline-block;
  width: 1em;
  height: 1em;
  background-color: pink;
}
</style>
<div></div>
<div><span></span></div>