<!DOCTYPE html> <!-- Any copyright is dedicated to the Public Domain. - http://creativecommons.org/publicdomain/zero/1.0/ --> <html> <head> <title>CSS Test: Sticky Positioning - absolute containing block</title> <link rel="author" title="Corey Ford" href="mailto:cford@mozilla.com"> <link rel="match" href="containing-block-1-ref.html"> <meta name="assert" content="Sticky positioned elements should establish a containing block for absolutely positioned descendants"> <style> body { height: 200px; margin: 0; } #sticky { position: sticky; top: 100px; height: 10px; background-color: black; } #absolute { position: absolute; top: 5px; left: 5px; width: 10px; height: 10px; background-color: blue; } </style> <body> <div id="sticky"> <div id="absolute"></div> </div> </body> </html>