chromium/third_party/blink/web_tests/external/wpt/css/css-position/sticky/position-sticky-padding-001.html

<!DOCTYPE html>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="help" href="https://drafts.csswg.org/css-position/#sticky-pos">
<link rel="help" href="https://bugzil.la/1882091">
<link rel="match" href="position-sticky-padding-001-ref.html">
<link rel="author" href="mailto:[email protected]" title="Emilio Cobos Álvarez">
<link rel="author" href="https://mozilla.org" title="Mozilla">
<style>
  .flex,
  .block {
    position: relative;
    width: 300px;
    height: 200px;
    padding: 10px;
    margin: 10px;
    float: left;
    overflow: auto;
    scrollbar-width: none;
    background-color: #ddd;
  }

  .flex {
    display: flex;
    flex-direction: row;
    align-items: start;
    justify-content: space-between;
  }

  .col {
    width: 100px;
    background-color: blue;
  }

  .col-1 {
    position: sticky;
    min-height: 300px;
    top: 0;
  }

  .col-2 {
    height: 20px;
    align-self: start;
    background-color: purple;
  }
  .block .col-2 {
    float: right; /* Just make it visible */
  }
  .abspos {
    position: absolute;
    width: 10px;
    height: 10px;
    background-color: cyan;
    top: 600px;
  }
</style>
<div class="flex">
  <div class="col col-1"></div>
  <div class="col col-2"></div>
  <div class="abspos"></div>
</div>
<div class="block">
  <div class="col col-2"></div>
  <div class="col col-1"></div>
  <div class="abspos"></div>
</div>
<script>
onload = function() {
  for (let e of document.querySelectorAll('.flex,.block')) {
    e.scrollTop = 100000;
  }
};
</script>