<!doctype html> <meta charset="utf-8"> <title>CSS Test: will-change: backdrop-filter should generate a containing block for absolute positioned elements.</title> <link rel="author" title="Philip Rogers" href="mailto:pdr@chromium.org"> <link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=960953"> <link rel="help" href="https://drafts.csswg.org/css-will-change/#will-change"> <link rel="help" href="https://drafts.fxtf.org/filter-effects-2/#BackdropFilterProperty"> <link rel="match" href="will-change-abspos-cb-003-ref.html"> <style> .container { border: 1px solid green; background: red; width: 100px; height: 100px; margin-top: 100px; will-change: backdrop-filter; } .abspos { position: absolute; top: 0; left: 0; background: green; height: 100px; width: 100px; } </style> <div class="container"> <div class="abspos"></div> </div>