| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> |
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| <html xmlns="http://www.w3.org/1999/xhtml"> |
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| <head> |
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| <title>CSS Test: Margin collapsing with clearance - margins of a 'collapsed through' box with clearance do not collapse with parent block's bottom margin</title> |
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| <link rel="help" href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins" /> |
| <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#normal-block" /> |
| <link rel="bookmark" href="http://lists.w3.org/Archives/Public/public-css-testsuite/2013Oct/0009.html" title="Issue with margin-collapse-clear-012.htm and margin-collapse-clear-013.htm" /> |
| <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> |
| <link rel="author" title="Bruno Fassino" href="fassino[at]gmail.com" /> |
| <link rel="match" href="margin-collapse-clear-012-ref.xht" /> |
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| <meta content="When an element has had clearance applied to it and its own margins collapse, these margins do not collapse with the bottom margin of the parent block" name="assert" /> |
| |
| <style type="text/css"><![CDATA[ |
| #rel-pos-wrapper {position: relative;} |
| |
| #parent-lime |
| { |
| background-color: lime; |
| border-top: black solid 1px; |
| width: 50%; |
| } |
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| #float-left-blue |
| { |
| background-color: blue; |
| float: left; |
| height: 100px; |
| width: 100px; |
| } |
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| #clear-left |
| { |
| clear: left; |
| margin-bottom: 140px; |
| margin-top: 40px; |
| } |
| |
| #next-yellow |
| { |
| background-color: yellow; |
| height: 100px; |
| } |
| |
| .ref-overlapped-red |
| { |
| background-color: red; |
| position: absolute; |
| z-index: -1; |
| } |
| |
| #ref1 |
| { |
| height: 200px; |
| top: 1px; |
| width: 50%; |
| } |
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| #ref2 |
| { |
| height: 100px; |
| top: 201px; |
| width: 100%; |
| } |
| ]]></style> |
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| </head> |
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| <body> |
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| <p>Test passes if there is <strong>no red</strong>.</p> |
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| <div id="rel-pos-wrapper"> |
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| <!-- |
| |
| clearance |
| + |
| margin-top of #clear-left (40px) |
| ==================================== |
| height of #float-left-blue (100px) |
| |
| therefore, clearance is equal to +60px |
| |
| --> |
| |
| <!-- |
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| #parent-lime should have height 200px, sum of: |
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| 100px : height of #float-left-blue |
| + |
| (140px - 40px) : part of #clear-left's margin-bottom |
| exceeding #clear-left's margin-top |
| ======= |
| 200px |
| |
| The position of the top border edge of the div#clear-left |
| is where it would have been if the element had a |
| non-zero bottom border. The margins of div#clear-left |
| collapse together to 140px and the top border edge of |
| div#clear-left is at 40px inside of it. Clearance is |
| added at such position, not to the whole 140px. |
| |
| Issue with margin-collapse-clear-012.htm and margin-collapse-clear-013.htm |
| http://lists.w3.org/Archives/Public/public-css-testsuite/2013Oct/0012.html |
| |
| --> |
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| <div id="parent-lime"> |
| <div id="float-left-blue"></div> |
| <div id="clear-left"></div> |
| </div> |
| |
| <!-- |
| #next-yellow should immediately follow #parent-lime (no margins in between) |
| --> |
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| <div id="next-yellow"></div> |
| |
| <!-- |
| #ref1 and #ref2 boxes create a sort of 'reference rendering' |
| where #ref1 should be covered, overlapped by #parent-lime |
| while #ref2 should be covered, overlapped by #next-yellow. |
| --> |
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| <div id="ref1" class="ref-overlapped-red"></div> |
| <div id="ref2" class="ref-overlapped-red"></div> |
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| </div> |
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| </body> |
| </html> |
