<!doctype HTML>
<html>
<meta charset="utf8">
<title>Content Visibility: hidden iframe, size changes (reference)</title>
<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">

<p>Test fails if the box below is square.</p>
<iframe width=200 height=300></iframe>
</html>

