<!DOCTYPE HTML> <html> <head> <meta charset="utf-8"> <title>CSS Test: 'contain: paint' element should contain fixed position elements.</title> <link rel="author" title="Kyle Zentner" href="mailto:zentner.kyle@gmail.com"> <link rel="help" href="https://drafts.csswg.org/css-contain/#containment-paint"> <link rel="match" href="contain-paint-containing-block-fixed-001-ref.html"> <style> #a { contain: paint; width: 100px; height: 100px; background: red; margin: 50px; } #b { position: fixed; top: 0; left: 0; width: 100px; height: 100px; background: green; } </style> </head> <body> <div id="a"> <div> <div id="b"></div> </div> </div> </body> </html>