wpt/css/css-contain/content-visibility/content-visibility-auto-in-iframe.html at master · web-platform-tests/wpt · GitHub

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<!doctype HTML>
<html>
<meta charset="utf8">
<title>CSS Content Visibility: auto container in an iframe</title>
<link rel="author" title="Martin Robinson" href="mailto:mrobinson@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">
<link rel="match" href="content-visibility-auto-in-iframe-ref.html">
<meta name="assert" content="content-visibility: auto shows on screen iframe contents">

<iframe id="frame" srcdoc='
  <style>
  #container {
    width: 200px;
    height: 200px;
    content-visibility: auto;
  }
  #child {
    width: 100px;
    height: 100px;
    background: green;
  }
  </style>
  <div id="container">
    <div id="child"></div>
  </div>
  hello
'></iframe>
</html>