<head>
    <style type="text/css">
        /* Valid media query expression, background-color must be green. */
        @media (min-width: 100px) {
            div { background-color: green; }
        }

        /* Invalid media query expression, width media feature accepts length
         or number value. Media query should not match and div should not be blue. */
        @media (min-width: blah) {
            div { background-color: blue; }
        }
    </style>
</head>
<body>
    <div style="width: 200px; height: 200px;"\>
</body>