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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: margin collapsing - clear with child margin</title>
<!--
Inspired by
http://test.csswg.org/suites/css2.1/20110323/html4/c5525-fltmult-000.htm
-->
<link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
<link rel="reviewer" title="Arron Eicholz" href="arronei(at)gmail.com" /> <!-- 2013-07-30 -->
<link rel="bookmark" href="http://lists.w3.org/Archives/Public/public-css-testsuite/2012Jan/0022.html" title="[RC6] c5525-fltmult-000 imprecise and failed by several browsers" />
<link rel="help" href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins" title="8.3.1 Collapsing margins" />
<link rel="match" href="../reference/ref-filled-green-100px-square.xht" />
<meta name="assert" content="An element on which 'clear' is set to a value other than 'none' can have its own margin-top collapse with its first inflow block-level child as long as no line boxes, no clearance, no padding and no border separate them." />
<style type="text/css"><![CDATA[
body {margin: 8px;}
p {margin: 1em 0em;}
div#overlapped-red
{
background-color: red;
height: 100px;
position: absolute;
width: 100px;
z-index: -1;
}
div#floated-left
{
background-color: green;
color: green;
float: left;
font: 1em/1.25 serif;
padding: 15px;
/*
15px : padding-top
+
20px : line box height
+
15px : padding-bottom
=====
50px
*/
width: 70px;
}
div#cleared-left {clear: left;}
div#child-of-cleared-left
{
background-color: green;
color: green;
height: 50px;
margin-top: 50px;
width: 100px;
}
/*
The idea is to have div#cleared-left's margin-top collapse
with div#child-of-cleared-left's margin-top. The margin collapsing
should occur before calculating clearance.
*/
]]></style>
</head>
<body>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="overlapped-red"></div>
<div id="floated-left">flt lef</div>
<div id="cleared-left">
<div id="child-of-cleared-left">chld clr</div>
</div>
</body>
</html>
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