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<!DOCTYPE html>
<html>
<head>
<title>CSS Shadow Parts - Serialization</title>
<link href="https://drafts.csswg.org/css-shadow-parts/" rel="help">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<style id="styleElement">
::part(\(foo) {}
::part( bar\ ) {}
::part( -foo bar ) {}
</style>
<script>
"use strict";
const rules = styleElement.sheet.cssRules;
test(function() {
assert_equals(rules[0].selectorText, "::part(\\(foo)");
}, "Escape start parenthesis in ::part name.");
test(function() {
assert_equals(rules[1].selectorText, "::part(bar\\ )");
}, "Escape start space in ::part name.");
test(function() {
assert_equals(rules[2].selectorText, "::part(-foo bar)");
}, "Collapse spaces in ::part names list.");
</script>
</body>
</html>
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