File: Node-mutation-adoptNode.html

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<!DOCTYPE html>
<meta charset=utf-8>
<title>Node-manipulation-adopted</title>
<link rel=help href="https://dom.spec.whatwg.org/#dom-domimplementation-createhtmldocument">
<link rel=help href="https://dom.spec.whatwg.org/#mutation-algorithms">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
"use strict";

test(() => {
  const old = document.implementation.createHTMLDocument("");
  const div = old.createElement("div");
  div.appendChild(old.createTextNode("text"));
  assert_equals(div.ownerDocument, old);
  assert_equals(div.firstChild.ownerDocument, old);
  document.body.appendChild(div);
  assert_equals(div.ownerDocument, document);
  assert_equals(div.firstChild.ownerDocument, document);
}, "simple append of foreign div with text");

test(function() {
  var div = document.createElement("div");
  div.id = "foobar";

  assert_equals(div.ownerDocument, document);
  assert_equals(div.attributes[0].ownerDocument, document);

  var other_doc = document.implementation.createHTMLDocument();
  other_doc.body.appendChild(div);

  assert_equals(div.ownerDocument, other_doc);
  assert_equals(div.attributes[0].ownerDocument, other_doc);
}, "Adopting an element into a different document update's the element's owner doc as well as the owner docs of it's attributes")

</script>