<!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><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>CSS Test: Containing block for absolute positioned elements is nearest positioned (relative) ancestor</title> <style type="text/css"> @page { font: italic 8pt sans-serif; color: gray; margin: 7%; counter-increment: page; @top-left { content: "CSS 2.1 Conformance Test Suite"; } @top-right { content: "Test containing-block-009"; } @bottom-right { content: counter(page); } } </style> <link rel="author" title="Microsoft" href="http://www.microsoft.com/" /> <link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> <!-- 2012-04-04 --> <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#containing-block-details" /> <link rel="match" href="reference/containing-block-009-ref.xht" /> <meta name="flags" content="" /> <meta name="assert" content="If the element has 'position: absolute', the containing block is established by the nearest positioned ancestor." /> <style type="text/css"> #div1 { border: solid black; margin: 50px; position: relative; top: 0; } div div { height: 1in; width: 1in; } #div2 { margin: 50px; } #div3 { background: blue; right: 0; position: absolute; top: 0; } </style> </head> <body> <p>Test passes if a filled blue square is in the <strong>upper-right corner</strong> of an hollow wide black rectangle.</p> <div id="div1"> <div id="div2"> <div id="div3"></div> </div> </div> </body> </html>