| <!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 - parent edge and element edge are the same when margins collapse</title> |
| <link rel="author" title="Microsoft" href="http://www.microsoft.com/" /> |
| <link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> <!-- 2012-08-15 --> |
| <link rel="help" href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins" /> |
| <link rel="match" href="margin-collapse-017-ref.xht" /> |
| |
| <meta name="assert" content="When the top margin of a child box collapses with the top margin of its parent, then the margin-top edge of such child box is the same as the parent's and their respective content should be 'sitting' at the parent's border-bottom (in the testcase, the black line) assuming the same height value and the same padding-bottom value for the parent and its child box." /> |
| <style type="text/css"> |
| #div1 |
| { |
| border-bottom: black solid 3px; |
| } |
| div div |
| { |
| height: 20px; |
| margin-top: 60px; |
| width: 60px; |
| } |
| #div2 |
| { |
| background: red; |
| } |
| #div3 |
| { |
| background: blue; |
| } |
| </style> |
| </head> |
| <body> |
| <p>Test passes if the blue stripe is touching the line and there is <strong>no red</strong>.</p> |
| <div id="div1"> |
| <div id="div2"> |
| <div id="div3"></div> |
| </div> |
| </div> |
| </body> |
| </html> |
