Source code
Revision control
Copy as Markdown
Other Tools
Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/CSS2/visuren/position-absolute-percentage-inherit-001.xht - WPT Dashboard Interop Dashboard
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<head>
<title>CSS Test: position absolute - dimensions and position given by offset percentages and inherit</title>
<link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
<link rel="help" title="9.3.2 Box offsets: 'top', 'right', 'bottom', 'left'" href="http://www.w3.org/TR/CSS21/visuren.html#position-props" />
<link rel="help" title="6.2.1 The 'inherit' value" href="http://www.w3.org/TR/CSS21/cascade.html#value-def-inherit" />
<link rel="help" title="4.3.2 Length" href="http://www.w3.org/TR/CSS21/syndata.html#length-units" />
<link rel="match" href="position-absolute-percentage-inherit-001-ref.xht" />
<meta content="Absolutely positioned boxes can be dimensioned and positioned solely by setting offset 'top', 'right', 'bottom' and 'left' property values with percentage unit and then with inherit keyword. 'inherit' on a offset property makes such offset property take the same computed value as the offset property of the nearest positioned ancestor; in the case of a percentage value - like in this testcase - , the computed value is the specified percentage value of such nearest positioned ancestor." name="assert" />
<style type="text/css"><![CDATA[
body {margin: 8px;}
p
{
font: 1em/1.25 serif;
margin: 1em 0em;
}
div#rel-pos-grand-parent
{
background-color: green;
height: 300px;
position: relative;
width: 400px;
}
div#abs-pos-parent
{
background-color: green;
bottom: 10%; /* 10% of 300px == 30px */
left: 15%; /* 15% of 400px == 60px */
position: absolute;
right: 20%; /* 20% of 400px == 80px */
top: 30%; /* 30% of 300px == 90px */
/*
height will be 300px minus 90px minus 30px == 180px
width will be 400px minus 60px minus 80px == 260px
*/
}
div#abs-pos-child-red
{
background-color: red;
bottom: inherit; /* 10% of div#abs-pos-parent's height == 18px */
left: inherit; /* 15% of div#abs-pos-parent's width == 39px */
position: inherit;
right: inherit; /* 20% of div#abs-pos-parent's width == 52px */
top: inherit; /* 30% of div#abs-pos-parent's height == 54px */
/*
height will be 180px minus 54px minus 18px == 108px
width will be 260px minus 39px minus 52px == 169px
*/
}
div#abs-pos-overlapping-green
{
background-color: green;
height: 108px;
left: 107px;
/*
8px (body's margin-left)
+
60px (div#abs-pos-parent's left offset)
+
39px (div#abs-pos-child-red's left offset)
==================
107px
*/
position: absolute;
width: 169px;
top: 216px;
}
/*
max(8px, 16px) (margin collapsing between body's margin-top and p's margin-top)
+
20px (first line)
+
20px (second line)
+
16px (p's margin-bottom)
+
90px (div#abs-pos-parent's top offset)
+
54px (div#abs-pos-child-red's top offset)
==================
216px
*/
]]></style>
</head>
<body>
<p>Test passes if there is a filled <br />
green rectangle and no red.</p>
<div id="rel-pos-grand-parent">
<div id="abs-pos-parent">
<div id="abs-pos-child-red"></div>
</div>
</div>
<div id="abs-pos-overlapping-green"></div>
</body>
</html>