File: Range-intersectsNode-shadow.html

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<!doctype html>
<title>Range.intersectsNode with Shadow DOM</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="host"></div>
<script>
test(() => {
  const host = document.getElementById("host");
  host.attachShadow({ mode: "open" }).innerHTML = `<span>ABC</span>`;

  const range = document.createRange();
  range.selectNode(document.body);

  assert_true(range.intersectsNode(host), "Should intersect host");
  assert_false(range.intersectsNode(host.shadowRoot), "Should not intersect shadow root");
  assert_false(range.intersectsNode(host.shadowRoot.firstElementChild), "Should not intersect shadow span");
}, "Range.intersectsNode() doesn't return true for shadow children in other trees");
</script>