File: dialog-autofocus-just-once.html

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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/interaction/focus/the-autofocus-attribute/resources/utils.js"></script>
<body>
<dialog>
<input>
<input autofocus>
</dialog>
<script>
// https://github.com/whatwg/html/issues/4788
promise_test(async () => {
  const dialog = document.querySelector('dialog');
  dialog.show();
  assert_equals(document.activeElement, dialog.querySelector('[autofocus]'),
      'dialog.show() should set focus on a descendant element with an ' +
      'autofocus attribute.');
  document.activeElement.blur();
  await waitUntilStableAutofocusState();
  assert_equals(document.activeElement, document.body,
      'Non-dialog autofocus processing should be skipped.');
}, 'An autofocus element in a dialog element should not try to get focus twice.');
</script>
</body>