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<!DOCTYPE html>
<title>Reference for position:sticky bottom constraint should behave correctly for <tfoot> elements</title>
<style>
.group {
  display: inline-block;
  position: relative;
  width: 150px;
  height: 200px;
}
.scroller {
  position: relative;
  width: 100px;
  height: 150px;
  overflow-x: hidden;
  overflow-y: auto;
}
.contents {
  height: 550px;
}
.indicator {
  position: absolute;
  background-color: green;
  left: 0;
  height: 50px;
  width: 50px;
}
</style>
<script>
window.addEventListener('load', function() {
  document.getElementById('scroller1').scrollTop = 0;
  document.getElementById('scroller2').scrollTop = 75;
  document.getElementById('scroller3').scrollTop = 200;
});
</script>
<div>You should see three green boxes below. No red or blue should be visible.</div>
<div class="group">
  <div id="scroller1" class="scroller">
    <div class="indicator" style="top: 100px;"></div>
    <div class="contents"></div>
  </div>
</div>
<div class="group">
  <div id="scroller2" class="scroller">
    <div class="indicator" style="top: 150px;"></div>
    <div class="contents"></div>
  </div>
</div>
<div class="group">
  <div id="scroller3" class="scroller">
    <div class="indicator" style="top: 250px;"></div>
    <div class="contents"></div>
  </div>
</div>