<!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 Writing Modes Test: absolutely positioned non-replaced element - 'direction: ltr' and 'left', 'width' and 'right' are 'auto'</title> <link rel="author" title="GĂ©rard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> <link rel="help" href="http://www.w3.org/TR/css-writing-modes-3/#vertical-layout" title="7.1 Principles of Layout in Vertical Writing Modes" /> <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width" title="10.3.7 Absolutely positioned, non-replaced elements" /> <link rel="match" href="s71-abs-pos-non-replaced-vrl-004-ref.xht" /> <meta name="flags" content="ahem image" /> <meta name="assert" content="When 'direction' is 'ltr' and 'left', 'width' and 'right' are 'auto', then set 'left' to the static position, the width becomes shrink-to-fit and then solve for 'right'." /> <link type="text/css" rel="stylesheet" href="support/ahem.css" /> <style type="text/css"><![CDATA[ div#containing-block { background: red url("support/bg-red-3col-2row-320x320.png"); color: transparent; direction: ltr; font: 80px/1 Ahem; height: 320px; position: relative; width: 320px; } div#containing-block > span { background-color: red; color: green; left: auto; position: absolute; right: auto; width: auto; -ah-writing-mode: vertical-rl; -webkit-writing-mode: vertical-rl; writing-mode: tb-rl; /* IE11 */ writing-mode: vertical-rl; } /* " If all three of 'left', 'width', and 'right' are 'auto': First set any 'auto' values for 'margin-left' and 'margin-right' to 0. Then, if the 'direction' property of the element establishing the static-position containing block is 'ltr' set 'left' to the static position and apply rule number three below; otherwise, set 'right' to the static position and apply rule number one below. 3. 'width' and 'right' are 'auto' and 'left' is not 'auto', then the width is shrink-to-fit . Then solve for 'right' " 'left' + 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' + 'right' = width of containing block So: 160px : left: auto: set to static position + 0px : margin-left + 0px : border-left-width + 0px : padding-left + (shrink-to-fit) : width: auto + 0px : padding-right + 0px : border-right-width + 0px : margin-right + (solve) : right: auto ===================== 320px : width of containing block gives us: 160px : left: auto: set to static position + 0px : margin-left + 0px : border-left-width + 0px : padding-left + 80px : (shrink-to-fit) : width: auto + 0px : padding-right + 0px : border-right-width + 0px : margin-right + (solve) : right: auto ===================== 320px : width of containing block And so computed right value must be 80px . */ ]]></style> </head> <body> <p><img src="support/pass-cdts-abs-pos-non-replaced.png" width="246" height="36" alt="Image download support must be enabled" /></p> <div id="containing-block">1 2 34<span>X</span></div> </body> </html>