dialog-no-throw-requested-state.html

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/interactive-elements/the-dialog-element/dialog-no-throw-requested-state.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<link rel=author href="mailto:jarhar@chromium.org">

<link rel=help href="https://github.com/whatwg/html/pull/9142">

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

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

<dialog>hello</dialog>

<script>

test(() => {

  const dialog = document.querySelector('dialog');

  // calling close() on a dialog that is already closed should not throw.

  dialog.close();

  dialog.show();

  // calling show() on a dialog that is already showing non-modal should not throw.

  dialog.show();

  assert_throws_dom('InvalidStateError', () => dialog.showModal(),

    'Calling showModal() on a dialog that is already showing non-modal should throw.');

  dialog.close();

  dialog.showModal();

  assert_throws_dom('InvalidStateError', () => dialog.show(),

    'Calling show() on a dialog that is already showing modal should throw.');

  // calling showModal() on a dialog that is already showing modal should not throw.

  dialog.showModal();

});

</script>