mozilla-release/testing/web-platform/tests/conformance-checkers/html-aria/roles-properties-supported/roles-properties-supported-gridcell-aria-readonly-true.html

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