| <!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: Absolutely positioned, non-replaced elements, over-constrained</title> |
| <link rel="author" title="Microsoft" href="http://www.microsoft.com/" /> |
| <link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> <!-- 2012-08-27 --> |
| <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-height" /> |
| <link rel="match" href="absolute-non-replaced-height-006-ref.xht" /> |
| |
| <meta name="flags" content="" /> |
| <meta name="assert" content="The 'bottom' value is ignored and the equation solves for the bottom value, when the values for 'top', 'bottom', 'height', 'margin-top', 'margin-bottom' add up to more than the containing blocks height." /> |
| <style type="text/css"> |
| #div1 |
| { |
| border: 10px solid black; |
| height: 300px; |
| position: relative; |
| width: 300px; |
| overflow: auto; |
| } |
| div div |
| { |
| background: blue; |
| height: 150px; |
| margin-bottom: 50px; |
| margin-top: 50px; |
| position: absolute; |
| top: 50px; |
| width: 50%; |
| } |
| #div2 |
| { |
| bottom: 50px; |
| } |
| |
| /* |
| |
| 50px : top |
| + |
| 50px : margin-top |
| + |
| 0 : border-top-width |
| + |
| 0 : padding-top |
| + |
| 150px : height |
| + |
| 0 : padding-bottom |
| + |
| 0 : border-bottom-width |
| + |
| 50px : margin-bottom |
| + |
| 50px : bottom |
| ============= |
| 350px while the height of containing block is only 300px. |
| |
| So, here we definitely have an overconstrained situation. In which |
| case the spec clearly states |
| "If the values are over-constrained, ignore the value for 'bottom' |
| and solve for that value." |
| http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-height |
| |
| So, here, the used value for bottom will be 0px so that the equation |
| gets balanced. |
| |
| */ |
| |
| #div3 |
| { |
| bottom: 0; |
| left: 50%; |
| } |
| </style> |
| </head> |
| <body> |
| <p>Test passes if there is one and only one blue rectangle inside an hollow black square and if such black square does not have a vertical scrollbar.</p> |
| <div id="div1"> |
| <div id="div2"></div> |
| <div id="div3"></div> |
| </div> |
| </body> |
| </html> |
