src/third_party/web_platform_tests/conformance-checkers/html-aria/roles-properties-supported-inherited/heading-aria-expanded-undefined.html - cobalt - Git at Google

 <!DOCTYPE html>
 <html>
    <head>
       <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
       <title>&lt;div&gt; with role heading; inherited supported state or property "aria-expanded" value
          of "undefined"
       </title>
    </head>
    <body>
       <div id="test" role="heading" aria-expanded="undefined">Placeholder content</div>
       <div id="obj1">obj1</div>
       <div id="obj2">obj2</div>
    </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
	<title><div> with role heading; inherited supported state or property "aria-expanded" value
	of "undefined"
	</title>
	</head>
	<body>
	<div id="test" role="heading" aria-expanded="undefined">Placeholder content</div>
	<div id="obj1">obj1</div>
	<div id="obj2">obj2</div>
	</body>
	</html>