aria-hidden-descendants.html | Explore in Territory

<!--
@WIN-DENY:IA2_EVENT_TEXT_INSERTED*
@WIN-DENY:IA2_EVENT_TEXT_REMOVED*
-->
<html>
<body>
<!-- Show/hide events only need to occur on the root of what's shown/hidden,
     not for each descendant -->
<div role="toolbar">
  <div id="heading-root" role="heading" aria-label="Heading" class="a">
    <div id="heading-child">
      <div id="heading-grandchild"></div>
    </div>
  </div>
  <div id="banner-root" role="banner" aria-label="Banner" aria-hidden="true" class="b">
    <div id="banner-child">
      <div id="banner-grandchild"></div>
    </div>
  </div>
</div>
<script>
  function go() {
    document.querySelector('.a').setAttribute("aria-hidden", "true");
    document.querySelector('.b').removeAttribute("aria-hidden");
  }
</script>
</body>
</html>

chromium/content/test/data/accessibility/event/aria-hidden-descendants.html