scrollbar-gutter-scroll-into-view-ref.html

<!doctype html>
<title>CSS Test Reference: scrollIntoView with scrollbar gutter on root frame viewport</title>
<style>
  :root {
    scrollbar-gutter: stable both-edges;
    writing-mode: vertical-lr;
    overflow: hidden;
  }

  body {
    margin: 0;
  }

  #target {
    width: 100px;
    height: 100px;
    border: 4px solid black;
    position: absolute;
    left: 0;
    top: 0px;
    background-color: lightgreen;=
  }
  #bg {
    background-color: khaki;
    width: 200vw;
    height: 400vh;
  }
</style>
<div id="bg"></div>
<div id="target"></div>

chromium/third_party/blink/web_tests/external/wpt/css/css-scrollbars/scrollbar-gutter-scroll-into-view-ref.html