File: preserve-3d-flat-grouping-properties-containing-block.html

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<!doctype HTML>
<link rel="author" title="Chris Harrelson" href="mailto:chrishtr@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-transforms-2/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<style>
  div {
    width: 200px;
    height: 200px;
  }
  .parent {
    transform-style: preserve-3d;
    transform: rotateY(45deg)
  }

  .child {
    transform: rotateY(45deg);
    background: lightblue
  }
</style>

<div id=parentWithGrouping style="transform-style: preserve-3d; overflow: hidden">
  <div id=absoluteUnderGrouping style="position: absolute">
  </div>
</div>

<div id=parentWithoutGrouping style="transform-style: preserve-3d">
  <div id=absoluteNotUnderGrouping style="position: absolute">
  </div>
</div>

<script>
  test(function() {
    assert_equals(absoluteUnderGrouping.offsetParent, parentWithGrouping);
  }, "Preserve-3d element with a grouping property still a containing block");

  test(function() {
    assert_equals(absoluteNotUnderGrouping.offsetParent, parentWithoutGrouping);
  }, "Preserve-3d element without a grouping property still a containing block");
</script>