<!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: 'vertical-lr' and margin collapsing - collapse through sibling</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/#logical-direction-layout" title="7.4 Flow-Relative Mappings" /> <link rel="match" href="../reference/ref-filled-green-100px-square.xht" /> <meta content="ahem image" name="flags" /> <meta name="assert" content="This test checks that horizontal margins of boxes can collapse through a sibling box whose left and right margins collapse in 'vertical-lr' writing-mode." /> <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" /> <style type="text/css"><![CDATA[ div { font: 25px/1em Ahem; height: 4em; } div#wrapper { background-image: url("support/margin-collapse-2em-space-wm-vert.png"); writing-mode: vertical-lr; } div#left-most-sibling { background-color: green; margin-right: 2em; width: 1em; } div#middle-sibling { margin-left: 2em; margin-right: 2em; } div#right-most-sibling { background-color: green; margin-left: 2em; width: 1em; } ]]></style> </head> <body> <p>Test passes if there is a filled green square and <strong>no red</strong>.</p> <div id="wrapper"> <div id="left-most-sibling"></div> <div id="middle-sibling"></div> <div id="right-most-sibling"></div> </div> </body> </html>