content-with-popover-top-layer-ref.html

<!doctype html>
<meta charset="utf8">
<title>CSS Content Visibility: popover shows when rendered (ref)</title>

<style>
.box { width: 100px; height: 100px; border: 1px solid black; }
#popover { outline: none; }
</style>

<div id=container class=box>
This test passes if you can see “PASS” in a white box.
<div popover id=popover>PASS<div id=inner></div></div>
</div>
text

<script>
popover.showPopover();
</script>

chromium/third_party/blink/web_tests/external/wpt/css/css-contain/content-visibility/content-with-popover-top-layer-ref.html