| <!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: fixed positioning makes a stacking context</title> |
| |
| <link rel="help" href="http://www.w3.org/TR/CSS22/visuren.html#z-index" title="9.9.1 Specifying the stack level: the 'z-index' property" /> |
| <link rel="help" href="http://www.w3.org/TR/CSS22/changes.html#s.9.9.1" title="C.1 Changes since the Recommendation of 7 June 2011" /> |
| <meta name="assert" content="auto The stack level of the generated box in the current stacking context is 0. If the box has 'position: fixed' or if it is the root, it also establishes a new stacking context." /> |
| <link rel="match" href="fixed-pos-stacking-001-ref.xht" /> |
| <link rel="author" title="Bert Bos" href="mailto:[email protected]" /> |
| |
| |
| <style type="text/css"> |
| div {width: 5em; height: 2em} |
| |
| /* absolute with 'z-index: auto' does not create a stacking context */ |
| #absolute {position: absolute; left: 1em; top: 3em; background: green} |
| #absolute div {position: absolute} |
| #absolute div div {position: absolute; z-index: -1; background: red} |
| |
| /* fixed with 'z-index: auto' *does* create a stacking context */ |
| #fixed {position: fixed; left: 10em; top: 3em; background: red} |
| #fixed div {position: absolute} |
| #fixed div div {position: absolute; z-index: -1; background: green} |
| </style> |
| </head> |
| |
| <body> |
| <p>There should be no red.</p> |
| |
| <div id="absolute"> |
| <div> |
| <div></div> |
| </div> |
| </div> |
| |
| <div id="fixed"> |
| <div> |
| <div></div> |
| </div> |
| </div> |
| </body> |
| </html> |
