<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <title>CSS Test: Solved for 'width' when absolutely positioned non-replaced elements has 'left' and 'right' not set to 'auto'</title> <link rel="author" title="Microsoft" href="http://www.microsoft.com/"> <link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/"> <!-- 2012-08-31 --> <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width"> <link rel="match" href="reference/absolute-non-replaced-width-015-ref.htm"> <meta name="flags" content=""> <meta name="assert" content="When 'width' is 'auto' and 'left' and 'right' are not 'auto' element solves for 'width'."> <style type="text/css"> #div1 { border: solid black; height: 200px; position: relative; width: 300px; } div div { background: blue; left: 100px; height: 100px; margin-left: auto; margin-right: auto; position: absolute; right: 100px; width: auto; } </style> </head> <body> <p>Test passes if a filled blue square is <strong>horizontally centered</strong> inside an hollow black rectangle and if there is <strong>no red</strong>.</p> <div id="div1"> <div></div> </div> </body> </html>