chromium/third_party/blink/web_tests/external/wpt/css/css-contain/content-visibility/content-visibility-034-ref.html

<!doctype HTML>
<html>
<meta charset="utf8">
<title>Content Visibility: hidden element shifted down (reference)</title>
<link rel="author" title="Vladimir Levin" href="mailto:[email protected]">
<link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">

<style>
#container {
  width: 150px;
  height: 150px;
  border: 1px solid blue;
}
#spacer {
  width: 100px;
  height: 100px;
  background: orange;
}
#checker {
  width: 100px;
  height: 50px;
  background: blue;
}
</style>

<p>There should be a square blank box (with a blue border) between an orange square and a blue rectangle.
<div id="spacer"></div>
<div id="container"></div>
<div id="checker"></div>
</html>