css/css-backgrounds/border-radius-clip-002.htm

<!DOCTYPE html>
<html>
    <head>
        <title>CSS Test: Background is clipped to the curve of the content-box when 'background-clip: content-box'</title>
        <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
        <link rel="author" title="Elika J. Etemad" href="http://fantasai.inkedblade.net/contact">
        <link rel="match" href="reference/border-radius-clip-002-ref.htm">
        <link rel="help" href="https://www.w3.org/TR/css-backgrounds-3/#corner-clipping">
        <meta name="assert" content="Background is clipped to the curve of the content-box when 'background-clip: content-box'">
        <meta name=fuzzy content="0-70;0-50">
        <style type="text/css">
            #test-base
            {
                width: 98px;
                height: 98px;
                border: 10px double black;
                padding: 11px;
                border-radius: 40px;
                background: red url(support/swatch-red.png);
                background-clip: content-box;
            }
            #reference-cover
            {
                margin: -120px 0 40px 20px;
                width: 100px;
                height: 100px;
                border-radius: 20px;
                background-color: black;
            }

            #reference-base
            {
                width: 98px;
                height: 98px;
                margin-top: 62px;
                margin-left: 20px;
                border-radius: 20px;
                background: red url(support/swatch-red.png);
            }
            #test-cover
            {
                margin-top: -120px;
                border: 10px double black;
                padding: 10px;
                width: 100px;
                height: 100px;
                border-radius: 40px;
                background-color: black;
                background-clip: content-box;
            }
        </style>
    </head>
    <body>
        <p>Test passes if there is no red visible on the page.</p>
        <div id="test-base"></div>
        <div id="reference-cover"></div>
        <div id="reference-base"></div>
        <div id="test-cover"></div>
    </body>
</html>