wpt/css/CSS2/positioning/absolute-non-replaced-height-012.xht at 2dfd81e7dfab17dacde9dbf9a68773c16c53497e · web-platform-tests/wpt · GitHub

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<!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: Absolutely positioned, non-replaced elements, solve for 'bottom'</title>
        <link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
        <link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> <!-- 2012-08-31 -->
        <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-height" />
		<link rel="match" href="absolute-non-replaced-height-003-ref.xht" />

        <meta name="assert" content="When 'margin-top' and 'margin-bottom' are set to '0' the 'bottom' value resolves to the remaining space within the containing block." />
        <style type="text/css">
            #div1
            {
                border: solid black;
                height: 3in;
                position: relative;
                width: 3in;
            }
            div div
            {
                position: absolute;
                top: 1in;
                bottom: auto;
                height: 1in;
                margin-top: auto;
                margin-bottom: auto;
                background: blue;
                width: 100%;
            }

            /*
			"
            'bottom' is 'auto', 'top' and 'height' are not 'auto',
            then set 'auto' values for 'margin-top' and 'margin-bottom' to 0
            and solve for 'bottom'
			"

			Therefore, bottom used value must be 1in
            */
        </style>
    </head>
    <body>
        <p>Test passes if a blue rectangle is <strong>vertically centered</strong> in an hollow black square.</p>
        <div id="div1">
            <div></div>
        </div>
    </body>
</html>