<!DOCTYPE html> <html reftest-async-scroll reftest-displayport-x="0" reftest-displayport-y="0" reftest-displayport-w="800" reftest-displayport-h="2150" reftest-async-scroll-x="0" reftest-async-scroll-y="130"> <meta name="viewport" content="width=device-width"> <style> html, body { margin: 0; scrollbar-width: none; } .spacer { height: 100vh; background-color: green; } .sticky_bottom { position: sticky; bottom: 20px; height: 50px; background-color: blue; opacity: 50%; } .sticky_both { position: sticky; top: 20px; bottom: 20px; height: 50px; background-color: purple; opacity: 50%; } .sticky_top { position: sticky; top: 20px; height: 50px; background-color: red; opacity: 50%; } </style> <div class="spacer"></div> <div class="sticky_bottom"></div> <div class="sticky_both"></div> <div class="sticky_top"></div> <div class="spacer"></div>