ElementInternals-NotSupportedError.html

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This WPT test may be referenced by the following Test IDs:
- /custom-elements/form-associated/ElementInternals-NotSupportedError.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<body>

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

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

<script>

test(() => {

  class NotFormAssociatedElement extends HTMLElement {}

  customElements.define('my-element1', NotFormAssociatedElement);

  const element = new NotFormAssociatedElement();

  const i = element.attachInternals();

  assert_throws_dom('NotSupportedError', () => i.setFormValue(''));

  assert_throws_dom('NotSupportedError', () => i.form);

  assert_throws_dom('NotSupportedError', () => i.setValidity({}));

  assert_throws_dom('NotSupportedError', () => i.willValidate);

  assert_throws_dom('NotSupportedError', () => i.validity);

  assert_throws_dom('NotSupportedError', () => i.validationMessage);

  assert_throws_dom('NotSupportedError', () => i.checkValidity());

  assert_throws_dom('NotSupportedError', () => i.reportValidity());

  assert_throws_dom('NotSupportedError', () => i.labels);

}, 'Form-related operations and attributes should throw NotSupportedErrors' +

     ' for non-form-associated custom elements.');

</script>

</body>