chromium/third_party/blink/web_tests/external/wpt/shadow-dom/untriaged/shadow-trees/nested-shadow-trees/nested_tree_reftest.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" >
    <title>Shadow DOM Test - Tests nested shadow tree.</title>
    <link rel="match" href="nested_tree_reftest-ref.html" >
    <link rel="author" title="shingo.miyazawa" href="mailto:[email protected]" >
    <link rel="help" href="https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/shadow/index.html#nested-shadow-trees" >
    <script src="../../../../html/resources/common.js"></script>
    <meta name="assert" content="nested shadow tree style is valid." >
    <style>
      #host {
        width: 100px;
        height: 100px;
        background-color: red;
      }
    </style>
  </head>
  <body>
    <p>The test passes if there is a green square. Test failed if there is a red square.</p>
    <div id='host'>
    </div>
    <script>
      var shadowRoot = document.getElementById('host').attachShadow({mode: 'open'});
      shadowRoot.innerHTML = '<div id="sub" style="width: 100%;height:100%;"></div>';
      var nestedRoot = shadowRoot.getElementById('sub').attachShadow({mode: 'open'});
      nestedRoot.innerHTML = '<div style="width:100%; height:100%;background-color: green;"></div>';
    </script>
  </body>
</html>