margin-collapse-013

Margin collapsing - absolute positioning with children elements

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Flags
ahem, image
Assertion
Absolutely positioned boxes do not collapse margins with any in-flow children.

Source

 1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
 2 <html>
 3     <head>
 4         <title>CSS Test: Margin collapsing - absolute positioning with children elements</title>
 5         <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
 6         <link rel="help" href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins">
 7         <meta name="flags" content="ahem image">
 8         <meta name="assert" content="Absolutely positioned boxes do not collapse margins with any in-flow children.">
 9         <style type="text/css">
10             div
11             {
12                 font: 20px/1em Ahem;
13                 width: 5em;
14             }
15             #div1
16             {
17                 background: url('support/margin-collapse-013.png');
18                 height: 4em;
19             }
20             #div2, #div3
21             {
22                 margin-top: 2em;
23             }
24             #div2
25             {
26                 background: green;
27                 position: absolute;
28             }
29             #div3
30             {
31                 height: 0;
32             }
33         </style>
34     </head>
35     <body>
36         <p>Test passes if there is no red visible on the page.</p>
37         <div id="div1">
38             <div id="div2">
39                 <div id="div3"></div>
40             </div>
41         </div>
42     </body>
43 </html>