Document-createElementNS.html

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

<!DOCTYPE html>

<title>Custom Elements: document.createElementNS should support custom elements</title>

<link rel="help" content="https://dom.spec.whatwg.org/#concept-create-element">

<link rel="help" content="https://dom.spec.whatwg.org/#internal-createelementns-steps">

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

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

<body>

<script>

test(() => {

  class MyElement extends HTMLElement {};

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

  let element = document.createElementNS('http://www.w3.org/1999/xhtml', 'p:my-autonomous');

  assert_true(element instanceof MyElement);

  assert_equals(element.prefix, 'p');

}, 'autonomous: document.createElementNS should create custom elements with prefixes.');

test(() => {

  class MyElement2 extends HTMLElement {};

  customElements.define('my-autonomous2', MyElement2);

  let element = document.createElementNS('urn:example', 'my-autonomous2');

  assert_false(element instanceof MyElement2);

}, 'autonomous: document.createElementNS should check namespaces.');

test(() => {

  const xhtmlNS = 'http://www.w3.org/1999/xhtml';

  assert_false(document.createElementNS(xhtmlNS, 'x-foo') instanceof HTMLUnknownElement);

  assert_false(document.createElementNS(xhtmlNS, 'x-foo', {}) instanceof HTMLUnknownElement);

  assert_false((new Document()).createElementNS(xhtmlNS, 'x-foo') instanceof HTMLUnknownElement);

  assert_false((new Document()).createElementNS(xhtmlNS, 'x-foo', {}) instanceof HTMLUnknownElement);

}, 'autonomous: document.createElementNS should not create HTMLUnknownElement for a valid custom element name');

test(() => {

  class MyElement3 extends HTMLElement {};

  customElements.define('my-autonomous3', MyElement3);

  const instance = document.createElementNS('http://www.w3.org/1999/xhtml', 'my-autonomous3', undefined);

  assert_true(instance instanceof MyElement3);

}, 'autonomous: document.createElementNS with undefined options value should be upgraded.');

</script>

</body>