css/css-position/position-absolute-dynamic-static-position-table-cell.html

<!DOCTYPE html>
<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
<link rel="help" href="https://www.w3.org/TR/css-position-3/" />
<meta name="assert" content="This test checks that a dynamic change in constraints calculates the static position correctly for table-cells."/>
<style>
#table-cell {
  position: relative;
  display: table-cell;
  vertical-align: middle;

  width: 100px;
  height: 100px;
  background: red;
}

#target {
  position: absolute;
  translate: 0 -50px;

  width: 100px;
  height: 100px;
  background: green;
}
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="table-cell">
  <div id="target" style="top: 0;"></div>
</div>
<script>
document.body.offsetTop;
document.getElementById('target').style.top = 'auto';
</script>