1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
2 <html>
3
4 <head>
5
6 <title>CSS Test: Margin collapsing - margins of a 'collapsed through' box without clearance can collapse with parent block's bottom margin</title>
7
8 <link rel="help" href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins">
9 <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">
10 <link rel="author" title="Daniel Schattenkirchner" href="crazy-daniel{at}gmx.de">
11 <meta content="An element that does not have clearance applied to it can collapse its top margin with its parent block's bottom margin. Margins of a 'collapsed through' box without clearance applied to it can collapse with its parent block's bottom margin. An element with clear set to it (to other than 'none') can only create a clearance if and when there is a preceding floated block." name="assert">
12 <meta content="" name="flags">
13
14 <style type="text/css">
15 body
16 {
17 background-color: white;
18 }
19
20 #parent-block
21 {
22 background-color: red;
23 margin-bottom: 0px;
24 }
25
26 #sibling
27 {
28 background-color: green;
29 height: 100px;
30 }
31
32 #element-without-clearance-applied
33 {
34 clear: both;
35 margin-top: 100px;
36 }
37 </style>
38
39 </head>
40
41 <body>
42
43 <p>Below, there should be a green rectangle across the page. There should be no red in this page.</p>
44
45 <div id="parent-block">
46 <div id="sibling"></div>
47 <div id="element-without-clearance-applied"></div>
48 </div>
49
50 <!--
51 #element-without-clearance-applied's margin-top collapses with #parent-block's margin-bottom: the resulting margin-bottom then collapses with the adjoining white body's margin-bottom
52 -->
53
54 </body>
55 </html>