css/CSS2/values/numbers-units-005.xht

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title>CSS Test: Optional unit identifier after 0</title>
        <link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
        <link rel="help" href="http://www.w3.org/TR/CSS21/syndata.html#length-units" />
        <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>