<!DOCTYPE html>
<html>
   <head>
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <title>Native checkbox with aria-checked with role</title>
   </head>
   <body>
   	<form>
	   	<input type="checkbox" checked="checked" role="checkbox" aria-checked="mixed" id="test" value="Placeholder content" />
   	</form>
   </body>
</html>