testing/web-platform/tests/css/css-contain/content-visibility/content-visibility-with-popover-top-layer-003.html


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<!doctype html>
<html class="reftest-wait">
<meta charset="utf8">
<title>CSS Content Visibility: popover shows when rendered</title>
<link rel="author" title="Rob Buis" href="mailto:rbuis@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">
<link rel="match" href="content-with-popover-top-layer-ref.html">
<meta name="assert" content="top layer popovers start rendering when c-v is removed">

<script src="/common/reftest-wait.js"></script>

<style>
.box { width: 100px; height: 100px; border: 1px solid black; }
.hidden { content-visibility: hidden }
#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>
function unhide() {
  container.classList.remove("hidden");
  takeScreenshot();
}

function runTest() {
  container.classList.add("hidden");
  popover.showPopover();
  requestAnimationFrame(unhide);
}

onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest));
</script>