arget.offsetHeight, target.parentNode.offsetHeight);
}, '#target offsetSize matches #container offsetSize' );
test(() => {
  document.querySelector("#container").style.height = "100px";
  let target = document.querySelector("#target");
  assert_equals(target.offsetWidth, target.offsetHeight);
  assert_equals(target.offsetWidth, target.parentNode.offsetWidth);
  assert_equals(target.offsetHeight, target.parentNode.offsetHeight);
}, '#target offsetSize matches #container offsetSize after resize' );

</script>