testing/web-platform/tests/conformance-checkers/html-aria/roles-properties-supported-inherited/alert-aria-expanded-undefined.html


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