<!DOCTYPE html> <meta charset="UTF-8"> <title>CSS Containment Test: element with 'contain: content' and absolutely positioned descendants</title> <link rel="author" title="GĂ©rard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/"> <link rel="help" href="https://drafts.csswg.org/css-contain/#contain-property"> <link rel="match" href="../reference/ref-filled-green-100px-square.xht"> <meta name="assert" content="This test checks that an element with 'contain: content' acts as containing block for its absolutely positioned descendants."> <style> div { width: 100px; } div#contain-content { background-color: red; contain: content; height: 100px; } div.abspos { background-color: green; height: 50px; position: absolute; right: 0; } div#first-abspos { top: 0px; } div#second-abspos { bottom: 0px; } </style> <body> <p>Test passes if there is a filled green square and <strong>no red</strong>. <div id="contain-content"> <div id="first-abspos" class="abspos"></div> <div id="second-abspos" class="abspos"></div> </div>