<!DOCTYPE html> <!-- Any copyright is dedicated to the Public Domain. - http://creativecommons.org/publicdomain/zero/1.0/ --> <html> <head> <title>CSS Test: Sticky Positioning - containment and normal position</title> <link rel="author" title="Corey Ford" href="mailto:cford@mozilla.com"> <link rel="match" href="overcontain-1-ref.html"> <meta name="assert" content="Keeping the element's margin box within the containing block's content box should never move the element back past its normal position"> <style> body { margin: 0; } #sticky { position: sticky; top: 10px; height: 10px; margin-bottom: 10px; background-color: black; } </style> <body> <div id="sticky"></div> </body> </html>