<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Overflow Test: scroll-target-group property invalidation - reparenting nested anchors</title>
<link rel="help" href="https://drafts.csswg.org/css-overflow-5/#scroll-target-group">
<link rel="match" href="scroll-target-group-001-ref.html">
<style>
  .wrapper {
    scroll-target-group: auto;
  }

  #scroller {
    overflow: auto;
    height: 130px;
    width: 100px;
  }

  #scroller div {
    width: 100px;
    height: 100px;
    background-color: blue;
    margin: 5px;
  }

  a {
    color: red;
  }

  a:target-current {
    color: green;
  }
</style>
<div class="wrapper">
  <div id="target" class="wrapper">
    <a href="#target1">t1</a>
    <a href="#target2">t2</a>
    <a href="#target3">t3</a>
    <a href="#target4">t4</a>
  </div>
</div>
<div id="scroller">
  <div id="target1"></div>
  <div id="target2"></div>
  <div id="target3"></div>
  <div id="target4"></div>
</div>
<script>
  scroller.scrollTop = 400;
  document.documentElement.offsetTop;
  target.classList.remove('wrapper');
  document.documentElement.offsetTop;
  scroller.scrollTop = 0;
</script>