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<!doctype html>
<meta charset="utf-8">
<title>CSSOM: Test that rules with invalid pseudo elements are not found</title>
<link rel="help" href="https://drafts.csswg.org/cssom/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
::part {}
::slotted {}
::highlight {}
</style>
<script>
test(() => {
assert_equals(document.styleSheets[0].cssRules[0]?.selectorText, undefined, "No associated selectorText");
assert_equals(document.styleSheets[0].cssRules[0], undefined, "No invalid pseudo element rule should be found");
});
</script>
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