<!DOCTYPE html>
<title>Reference for position:sticky constraints are independent of writing mode</title>

<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style>
.group {
  display: inline-block;
  position: relative;
  width: 180px;
  height: 250px;
}

.scroller {
  position: relative;
  width: 130px;
  height: 200px;
  overflow: scroll;
  font: 25px/1 Ahem;
}

.contents {
  height: 500px;
  width: 200px;
}

.indicator {
  display: inline;
  color: green;
  position: relative;
}
</style>

<script>
window.addEventListener('load', function() {
  document.getElementById('scroller1').scrollTop = 50;
  document.getElementById('scroller1').scrollLeft = 20;
  document.getElementById('scroller2').scrollTop = 50;
  document.getElementById('scroller2').scrollLeft = -25;
});
</script>

<div class="group">
  <div id="scroller1" class="scroller" style="writing-mode: vertical-lr;">
    <div class="contents">
      <div class="indicator" style="left: 40px; top: 100px;">XXX</div>
    </div>
  </div>
</div>

<div class="group">
  <div id="scroller2" class="scroller" style="writing-mode: vertical-rl;">
    <div class="contents">
      <div class="indicator" style="right: 45px; top: 100px;">XXX</div>
    </div>
  </div>
</div>

<div>You should see two green blocks above. No red should be visible.</div>