wpt/css/css-position/position-absolute-dynamic-relayout-005.html at master · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<title>CSS Positioned Test: an absolutely positioned element whose containing block is an inline element resolves its percentage width correctly after revealing itself via content-visibility:visible</title>
<link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
<link rel="author" title="Mozilla" href="https://www.mozilla.org/">
<link rel="help" href="https://drafts.csswg.org/css-position-3/#absolute-cb">
<link rel="help" href="https://drafts.csswg.org/css-contain-2/#content-visibility">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=2042572">
<link rel="match" href="../reference/ref-filled-green-100px-square.xht">

<style>
#absCB {
  position: relative;
}
#abs {
  position: absolute;
  width: 80%;
  background: red;
  content-visibility: hidden;
}
#green {
  width: 100px;
  height: 100px;
  background: green;
}
</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<span id="absCB">
  <div>
    <div id="abs"><div id="green"></div></div>
  </div>
</span>

<script>
document.documentElement.offsetTop;
abs.style.contentVisibility = "visible";
</script>