margin-collapse-022

Margin collapsing - adjoining block boxes

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Flags
ahem, image
Assertion
Bottom margin of an in-flow block-level element is always adjoining to the top margin of its next in-flow block-level sibling.

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 - adjoining block boxes</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="Bottom margin of an in-flow block-level element is always adjoining to the top margin of its next in-flow block-level sibling.">
 9         <style type="text/css">
10             div
11             {
12                 font: 20px/1em Ahem;
13                 width: 5em;
14             }
15             div div
16             {
17                 background: green;
18                 height: 1em;
19             }
20             #div1
21             {
22                 background: url('support/margin-collapse-2em-space.png');
23             }
24             #div2
25             {
26                 margin-bottom: 2em;
27             }
28             #div3
29             {
30                 margin-top: 2em;
31             }
32         </style>
33     </head>
34     <body>
35         <p>Test passes if there is no red visible on the page.</p>
36         <div id="div1">
37             <div id="div2"></div>
38             <div id="div3"></div>
39         </div>
40     </body>
41 </html>