Node-childNodes-cache.html

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This WPT test may be referenced by the following Test IDs:
- /dom/nodes/Node-childNodes-cache.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset=utf-8>

<title>Node.childNodes caching bug</title>

<link rel=help href="https://bugzilla.mozilla.org/show_bug.cgi?id=1919031">

<link rel=author title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">

<link rel=author title="Mozilla" href="https://mozilla.org">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<div id="target"><div id="first"></div><div id="second"></div><div id="third"></div><div id="last"></div></div>

<script>

test(function() {

  let target = document.getElementById("target");

  let second = target.childNodes[1];

  assert_equals(second.id, "second");

  second.remove();

  assert_equals(target.childNodes[4], undefined, "Out of bounds elements are undefined");

  assert_equals(target.childNodes[3], undefined, "Out of bounds elements are undefined");

  assert_equals(target.childNodes.length, 3);

  assert_equals(target.childNodes[0].id, "first");

  assert_equals(target.childNodes[1].id, "third");

  assert_equals(target.childNodes[2].id, "last");

});

</script>