Document-importNode.html

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This WPT test may be referenced by the following Test IDs:
- /custom-elements/upgrading/Document-importNode.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<link rel="help" href="https://dom.spec.whatwg.org/#dom-document-importnode">

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

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

<script src="../resources/custom-elements-helpers.js"></script>

<body>

<script>

test_with_window((w, doc) => {

  class MyElement extends HTMLElement {}

  class MyElement2 extends w.HTMLElement {}

  customElements.define('my-element', MyElement);

  w.customElements.define('my-element', MyElement2);

  let original = document.createElement('my-element');

  assert_true(original instanceof MyElement);

  let imported = doc.importNode(original);

  assert_true(imported instanceof MyElement2);

}, 'autonomous: document.importNode() should import custom elements successfully');

test_with_window((w, doc) => {

  class MyElement3 extends w.HTMLElement {}

  w.customElements.define('my-element3', MyElement3);

  let original = document.createElement('my-element3');

  assert_equals(original.constructor, HTMLElement);

  let imported = doc.importNode(original);

  assert_true(imported instanceof MyElement3);

}, 'autonomous: document.importNode() should import "undefined" custom elements successfully');

</script>

</body>