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DOM: Enable moveBefore() inside ShadowRoot DocumentFragments #49100

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chromium-wpt-export-bot merged 1 commit into from
Nov 11, 2024
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DOM: Enable moveBefore() inside ShadowRoot DocumentFragments #49100

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22 changes: 22 additions & 0 deletions dom/nodes/moveBefore/tentative/moveBefore-shadow-root.html
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Original file line number Diff line number Diff line change
@@ -0,0 +1,22 @@
<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<body>
<div id=shadowTarget></div>
</body>

<script>
test(() => {
shadowTarget.attachShadow({mode: 'open'});
const child1 = document.createElement('p');
child1.textContent = 'Child1';
const child2 = document.createElement('p');
child2.textContent = 'Child2';

shadowTarget.shadowRoot.append(child1, child2);
shadowTarget.shadowRoot.moveBefore(child2, child1);
assert_equals(shadowTarget.shadowRoot.firstChild, child2, "Original lastChild is now firstChild");
assert_equals(shadowTarget.shadowRoot.lastChild, child1, "Original firstChild is now lastChild");
}, "moveBefore() is allowed in ShadowRoots (i.e., connected DocumentFragments)");
</script>