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Test Info:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>
CSS Values and Units Test:
Attribute references (length)
</title>
<meta name="assert" content="
The value of referenced attribute is used correctly as a length (even if it's 0).
" />
<link
rel="author"
title="François REMY"
href="mailto:fremycompany.developer@yahoo.fr"
/ >
<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; }
#outer2 { background: red; }
#outer { width: 200px; height: 200px; }
#outer2 { width: 200px; width: attr(data-test type(<length>)); height: 200px; }
</style>
</head>
<body>
<div id="outer"></div>
<div id="outer2" data-test="0"></div>
</body>
</html>