offsetparent.html | Explore in Territory

<!DOCTYPE html>
<div id=host style="position: absolute">
  <template shadowrootmode=open>
    <div id=shadowchild style="position: absolute">
      <slot></slot>
    </div>
  </template>
  <div id=lightchild></div>
</div>

<script>
window.offsetParentId = lightchild.offsetParent.id;
</script>

chromium/chrome/test/data/offsetparent.html