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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, over-constrained</title>
<link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
<link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> <!-- 2012-08-27 -->
<link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-height" />
<link rel="match" href="absolute-non-replaced-height-006-ref.xht" />
<meta name="assert" content="The 'bottom' value is ignored and the equation solves for the bottom value, when the values for 'top', 'bottom', 'height', 'margin-top', 'margin-bottom' add up to more than the containing blocks height." />
<style type="text/css">
#div1
{
border: 10px solid black;
height: 300px;
position: relative;
width: 300px;
overflow: auto;
}
div div
{
background: blue;
height: 150px;
margin-bottom: 50px;
margin-top: 50px;
position: absolute;
top: 50px;
width: 50%;
}
#div2
{
bottom: 50px;
}
/*
50px : top
+
50px : margin-top
+
0 : border-top-width
+
0 : padding-top
+
150px : height
+
0 : padding-bottom
+
0 : border-bottom-width
+
50px : margin-bottom
+
50px : bottom
=============
350px while the height of containing block is only 300px.
So, here we definitely have an overconstrained situation. In which
case the spec clearly states
"If the values are over-constrained, ignore the value for 'bottom'
and solve for that value."
http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-height
So, here, the used value for bottom will be 0px so that the equation
gets balanced.
*/
#div3
{
bottom: 0;
left: 50%;
}
</style>
</head>
<body>
<p>Test passes if there is one and only one blue rectangle inside an hollow black square and if such black square does not have a vertical scrollbar.</p>
<div id="div1">
<div id="div2"></div>
<div id="div3"></div>
</div>
</body>
</html>
|
