<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mstensho@chromium.org">
<link rel="help" href="https://drafts.csswg.org/cssom-view-1/#dom-element-getclientrects">
<div style="position:absolute; top:0; left:0; width:200px; height:100px; writing-mode:horizontal-tb; direction:ltr;">
  <br id="child">
</div>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
  test(()=>{
      let r = document.getElementById("child").getClientRects()[0];
      assert_equals(r.left, 0);
      assert_greater_than_equal(r.top, 0);
      assert_less_than(r.top, 50);
  }, "Position of the BR element");
</script>