<!doctype HTML>
<html>
<meta charset="utf8">
<title>Content Visibility: auto in the viewport (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">

<style>
.border {
  border: 1px solid black;
}
</style>

<div class=border>
  Test passes if there is a border around this text.
</div>
</html>