scrollbar-gutter-fixedpos-001-ref.html

<!DOCTYPE html>
<title>CSS Overflow Reference: Root element's scrollbar-gutter is accounted for in fixed-pos positioning</title>
<link rel="author" title="Ting-Yu Lin" href="mailto:[email protected]">
<link rel="author" title="Mozilla" href="https://www.mozilla.org/">
<style>
:root {
  scrollbar-gutter: stable;
}
body {
  margin: 0;
}
.fixed {
  width: 100px;
  height: 100px;
  background: green;
  position: absolute;
}
</style>

<div class="fixed" style="left: 0"></div>
<div class="fixed" style="right: 0"></div>

chromium/third_party/blink/web_tests/external/wpt/css/css-overflow/scrollbar-gutter-fixedpos-001-ref.html