| OLD | NEW |
|---|
| (Empty) | |
| 1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/x
html1/DTD/xhtml1-strict.dtd"> |
| 2 <html xmlns="http://www.w3.org/1999/xhtml"> |
| 3 <head> |
| 4 <title>CSS Test: Absolutely positioned, non-replaced elements, vertical
centering</title> |
| 5 <link rel="author" title="Microsoft" href="http://www.microsoft.com/" /> |
| 6 <link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/
BrowserBugsSection/css21testsuite/" /> <!-- 2012-08-31 --> |
| 7 <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#abs-non-r
eplaced-height" /> |
| 8 <link rel="match" href="absolute-non-replaced-height-003-ref.xht
" /> |
| 9 |
| 10 <meta name="flags" content="" /> |
| 11 <meta name="assert" content="An absolutely positioned non-replaced eleme
nt's padding box (which is the area painted by background-color of the element)
will be vertically centered within its containing block only if both 'margin-top
' and 'margin-bottom' have equal values and if 'top' and 'bottom' have equal val
ues. An absolutely positioned non-replaced element's margin box will be vertical
ly centered within its containing block only if 'top' and 'bottom' have equal va
lues." /> |
| 12 <style type="text/css"> |
| 13 #div1 |
| 14 { |
| 15 border: solid black; |
| 16 height: 3in; |
| 17 position: relative; |
| 18 width: 3in; |
| 19 } |
| 20 div div |
| 21 { |
| 22 background: blue; |
| 23 bottom: 0.5in; |
| 24 height: 1in; |
| 25 margin-bottom: auto; |
| 26 margin-top: auto; |
| 27 position: absolute; |
| 28 top: 0.5in; |
| 29 width: 100%; |
| 30 } |
| 31 |
| 32 /* |
| 33 |
| 34 0.5in : top |
| 35 + |
| 36 auto (solve): margin-top |
| 37 + |
| 38 0 : border-top-width |
| 39 + |
| 40 0 : padding-top |
| 41 + |
| 42 1in : height |
| 43 + |
| 44 0 : padding-bottom |
| 45 + |
| 46 0 : border-bottom-width |
| 47 + |
| 48 auto (solve) : margin-bottom |
| 49 + |
| 50 0.5in : bottom |
| 51 ============= |
| 52 3.0in : height of containing block |
| 53 |
| 54 So, margin-bottom and margin-top must use 0.5in so that the equation get
s balanced. |
| 55 |
| 56 */ |
| 57 |
| 58 |
| 59 </style> |
| 60 </head> |
| 61 <body> |
| 62 <p>Test passes if a blue rectangle is <strong>vertically centered</stron
g> in an hollow black square.</p> |
| 63 <div id="div1"> |
| 64 <div></div> |
| 65 </div> |
| 66 </body> |
| 67 </html> |
| OLD | NEW |
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Chromium Code Reviews
Issue 2824603002:
Import css21/positioning W3C CSS Test Suite (Closed)
