chromium/third_party/blink/web_tests/external/wpt/css/css-values/attr-px-invalid-fallback.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>
    CSS Values and Units Test:
    Attribute references (pixels)
  </title>
  <meta name="assert" content="
    When the fallback of a pixel attribute reference is invalid, the declaration is ignored.
  " />
  <meta name="flags" content="invalid">
  <link
    rel="author"
    title="François REMY"
    href="mailto:[email protected]"
  / >

  <link rel="help" href="http://www.w3.org/TR/css3-values/#attr-notation"/>

  <link
    rel="match"
    href="reference/200-200-green.html"
  />

  <style type="text/css">

      html, body { margin: 0px; padding: 0px; }

      html { background: white; overflow: hidden; }
      #outer { position: relative; background: green; }

      #outer { width: 200px; width: attr(data-test px, 300); height: 200px; }

  </style>

</head>
<body>

  <div id="outer" data-test="300"></div>

</body>
</html>