css/CSS2/floats/adjoining-floats-dynamic.html

<!DOCTYPE html>
<link rel="match" href="../../reference/ref-filled-green-100px-square.xht">
<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1003558">
<style>
#target {
  height: 50px;
  width: 0;
  background: green;
  float: right;
}

span {
  float: left;
  width: 50px;
  height: 50px;
  background: green;
}
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div style="display: flow-root; width: 100px; background: red;">
  <div id="target"></div>
  <div style="position: absolute; width: 50px; height: 50px; background: green;"></div>
  <div>
    <div style="clear: both; height: 10px;">
      <div>
        <span></span>
        <span></span>
      </div>
    </div>
  </div>
</div>
<script>
document.body.offsetTop;
document.getElementById('target').style.width = '50px';
</script>