<!DOCTYPE html>
<html>
<body>
<input type="checkbox" aria-label="Enabled">
<input type="checkbox" disabled aria-label="Disabled">
<button>Enabled</button>
<button disabled>Disabled</button>
<form>
Enabled form
<input type="checkbox" aria-label="Checkbox">
<button>Button</button>
</form>
<form aria-disabled="true">
Disabled form
<input type="checkbox" aria-label="Checkbox">
<button>Button</button>
</form>
</body>
</html>