chromium/third_party/blink/web_tests/wpt_internal/css/css-ui/outline-focus-layer.html

<!DOCTYPE html>
<link rel="author" href="mailto:[email protected]">
<link rel="help" href="https://drafts.csswg.org/css-ui-3/#outline-props">
<link rel="help" href="https://crbug.com/968019">
<link rel="match" href="outline-focus-layer-ref.html">
<meta name="assert" content="Outline is displayed correctly on children with paint layers">
<style>
body {
  margin: 50px;
  font-size: 0;
}
.outline {
  outline-style: auto;
}
#container {
  position: relative;
  width: 200px;
  height: 200px;
}
#target {
  display: inline-block;
  width: 100px;
  height: 100px;
  background: #EEE;
  transform: translate(120px, 120px);
}
.spacer {
  display: inline-block;
  height: 50px;
  width: 200px;
}
</style>
<!-- target outline should be painted as part of container outline -->
<div id="container" class="outline">
  <span class="spacer"></span>
  <span id="target"></span>
</div>