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Test Info:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<head>
<title>CSS Test: Optional unit identifier after 0</title>
<link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
<link rel="help" href="https://www.w3.org/TR/css-values-3/#lengths" />
<link rel="match" href="../reference/no-red-on-blank-page-ref.xht"/>
<meta name="assert" content="After a zero length, the unit identifier is not necessary." />
<style type="text/css">
div
{
background: red;
height: 1in;
height: 0;
width: 1in;
}
</style>
</head>
<body>
<p>Test passes if there is no red visible on the page.</p>
<div></div>
</body>
</html>