<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mstensho@chromium.org">
<link rel="help" href="https://www.w3.org/TR/cssom-view-1/#extensions-to-the-document-interface">
<div id="container" style="width:200px; height:200px; writing-mode:horizontal-tb; direction:ltr;">
  <span id="target">target</span>
</div>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
  test(()=> {
      var elements = document.elementsFromPoint(15, 15);
      assert_equals(elements.length, 4);
      assert_equals(elements[0].id, "target");
      assert_equals(elements[1].id, "container");
      assert_equals(elements[2].nodeName, "BODY");
      assert_equals(elements[3].nodeName, "HTML");
  }, "elementsFromPoint should return all elements under a point");
</script>