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| (Empty) | |
| 1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/x
html1/DTD/xhtml1-strict.dtd"> |
| 2 |
| 3 <html xmlns="http://www.w3.org/1999/xhtml"> |
| 4 |
| 5 <head> |
| 6 |
| 7 <title>CSS Test: Margin collapsing - margins of a 'collapsed through' box with
out clearance can collapse with parent block's bottom margin</title> |
| 8 |
| 9 <link rel="help" href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins"
/> |
| 10 <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserB
ugsSection/css21testsuite/" /> |
| 11 <link rel="author" title="Daniel Schattenkirchner" href="mailto:crazy-daniel@g
mx.de" /> |
| 12 <link rel="match" href="margin-collapse-clear-017-ref.xht" /> |
| 13 |
| 14 <meta content="An element that does not have clearance applied to it can colla
pse its top margin with its parent block's bottom margin. Margins of a 'collapse
d through' box without clearance applied to it can collapse with its parent bloc
k's bottom margin. An element with 'clear' set to a value other than 'none' can
create a clearance only if and only when there is an earlier (in the source docu
ment) floating box." name="assert" /> |
| 15 <meta content="image" name="flags" /> |
| 16 |
| 17 <style type="text/css"><![CDATA[ |
| 18 body |
| 19 { |
| 20 background: white url("support/ruler-v-100px-200px-300px.png") no-repeat; |
| 21 margin: 34px 8px 8px 55px; |
| 22 /* |
| 23 34px : body's top margin collapsing with p's top margin: max(34px, 16px) |
| 24 + 20px : p's 1st line box height |
| 25 + 20px : p's 2nd line box height |
| 26 + 16px : p's bottom margin |
| 27 + 10px : height of topmost green bar |
| 28 ====== |
| 29 100px |
| 30 */ |
| 31 } |
| 32 |
| 33 p |
| 34 { |
| 35 font-size: 16px; |
| 36 line-height: 20px; |
| 37 margin: 1em 8px; |
| 38 } |
| 39 |
| 40 div#parent-block {margin-bottom: 100px;} |
| 41 |
| 42 div.vertical-gap-separator |
| 43 { |
| 44 background-color: green; |
| 45 height: 10px; |
| 46 } |
| 47 |
| 48 div#element-without-clearance |
| 49 { |
| 50 clear: both; |
| 51 margin-top: 100px; |
| 52 } |
| 53 |
| 54 /* |
| 55 In this test, div#element-without-clearance |
| 56 is what the spec refers to as |
| 57 'collapsed through' box |
| 58 http://www.w3.org/TR/CSS21/box.html#collapsed-through |
| 59 */ |
| 60 ]]></style> |
| 61 |
| 62 </head> |
| 63 |
| 64 <body> |
| 65 |
| 66 <p>Test passes if there is a vertical gap<br /> |
| 67 of exactly 100px between 2 green bars.</p> |
| 68 |
| 69 <div id="parent-block"> |
| 70 <div class="vertical-gap-separator"></div> |
| 71 <div id="element-without-clearance"></div> |
| 72 </div> |
| 73 |
| 74 <div class="vertical-gap-separator"></div> |
| 75 |
| 76 <!-- |
| 77 div#element-without-clearance's margin-top should collapse |
| 78 with #parent-block's margin-bottom: max(100px, 100px) = 100px |
| 79 --> |
| 80 |
| 81 </body> |
| 82 </html> |
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Chromium Code Reviews
Issue 2818213003:
Import css21/floats-clear W3C CSS Test Suite (Closed)
