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Test Info:

<!DOCTYPE html>
<link rel=author href="mailto:jarhar@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<dialog autofocus id=autofocusdialog data-description="dialog element with autofocus should get initial focus." class=target>
<button>focusable button</button>
<button autofocus>autofocusable button</button>
</dialog>
<dialog id=keyboardfocusdialog data-description="Only keyboard-focusable elements should get dialog initial focus.">
<button tabindex="-1">mouse focusable button</button>
<button class=target>keyboard focusable button</button>
</dialog>
<dialog id=autofocuswithoutkeyboarddialog data-description="Autofocus takes precedence over keyboard-focusable requirement.">
<button>keyboard focusable button</button>
<button tabindex="-1" autofocus class=target>mouse focusable autofocus button</button>
</dialog>
<dialog id=subtree data-description="Only keyboard-focusable elements should get dialog initial focus including in subtrees.">
<div>
<button tabindex="-1">mouse focusable button</button>
<button class=target>keyboard focusable button</button>
</div>
</dialog>
<dialog id=nestedbuttons data-description="Only keyboard-focusable elements should get dialog initial focus including in nested buttons.">
<button tabindex="-1">
<span>mouse focusable button</span>
<button tabindex="-1">nested mouse focusable button</button>
</button>
<button class=target>keyboard focusable button</button>
</dialog>
<script>
document.querySelectorAll('dialog').forEach(dialog => {
test(t => {
let target = dialog.querySelector('.target');
if (dialog.classList.contains('target')) {
target = dialog;
}
t.add_cleanup(() => {
if (dialog.open)
dialog.close();
});
dialog.showModal();
assert_equals(document.activeElement, target,
'showModal: the target element did not receive initial focus.');
dialog.close();
dialog.show();
assert_equals(document.activeElement, target,
'show: the target element did not receive initial focus.');
dialog.close();
}, dialog.dataset.description);
});
</script>