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-rw-r--r--testing/web-platform/tests/html/dom/elements/global-attributes/the-anchor-attribute-xml.tentative.html25
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diff --git a/testing/web-platform/tests/html/dom/elements/global-attributes/the-anchor-attribute-xml.tentative.html b/testing/web-platform/tests/html/dom/elements/global-attributes/the-anchor-attribute-xml.tentative.html
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+++ b/testing/web-platform/tests/html/dom/elements/global-attributes/the-anchor-attribute-xml.tentative.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<link rel=author href="mailto:jarhar@chromium.org">
+<link rel="help" href="https://github.com/whatwg/html/pull/9144">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<body>
+<script>
+test(() => {
+ const xmlDoc = document.implementation.createDocument(null, 'root', null);
+ assert_equals(xmlDoc.contentType, 'application/xml');
+ xmlDoc.documentElement.innerHTML = '<div id="target">target</div><div anchor="target">anchored</div>';
+ assert_equals(xmlDoc.documentElement.innerHTML,
+ '<div id="target">target</div><div anchor="target">anchored</div>');
+ const target = xmlDoc.documentElement.children[0];
+ const anchored = xmlDoc.documentElement.children[1];
+
+ assert_equals(xmlDoc.documentElement.children[1].anchorElement, null,
+ 'Setting the anchor attribute in XML should not set the anchorElement IDL.');
+
+ anchored.anchorElement = target;
+ assert_equals(xmlDoc.documentElement.children[1].anchorElement, null,
+ 'Setting element.anchorElement in an XML document should not set the anchorElement IDL.');
+});
+</script>