<!DOCTYPE html>
<title>CSS Overflow Test: ::scroll-marker counters</title>
<link rel="match" href="scroll-marker-counters-ref.html">
<link rel="help" href="https://drafts.csswg.org/css-overflow-5/#scroll-marker-pseudo">
<style>
  #scroller {
    overflow: hidden;
    scroll-marker-group: after;
    counter-reset: item;
    height: 100px;
    width: 100px;
  }

  #scroller::scroll-marker-group {
    border: 3px solid black;
    display: flex;
    height: 100px;
    width: 300px;
  }

  .item {
    height: 10