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Test Info:

<!DOCTYPE html>
<meta charset=utf-8>
<title>contentEditable inherit from light tree parent</title>
<link rel="author" title="Rune Lillesveen" href="mailto:futhark@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<p>You should see the word PASS two times below and no FAIL.</p>
<div id="host1" contenteditable><div>FAILPASS</div></div>
<div id="host2" contenteditable><div>FAILPASS</div></div>
<script>
test(() => {
const root = host1.attachShadow({mode:"open"});
root.innerHTML = "<slot></slot>";
const text = host1.firstChild.firstChild;
const selection = window.getSelection();
selection.collapse(text, 0);
selection.extend(text, 4);
host1.focus();
document.execCommand("delete");
host1.blur();
assert_equals(text.data, "PASS", "Text should be PASS after FAIL is deleted");
}, "Slotted child of contenteditable host should be editable - slot direct child of shadow root");
test(() => {
const root = host2.attachShadow({mode:"open"});
root.innerHTML = "<div><slot></slot></div>";
const text = host2.firstChild.firstChild;
const selection = window.getSelection();
selection.collapse(text, 0);
selection.extend(text, 4);
host2.focus();
document.execCommand("delete");
host2.blur();
assert_equals(text.data, "PASS", "Text should be PASS after FAIL is deleted");
}, "Slotted child of contenteditable host should be editable - slot wrapped in shadow tree ancestor");
</script>