<style>
#container {
  width: 100px;
  font-size: 20px;
  font-family: Ahem;
}

#inline_block {
  display:inline-block;
}
</style>
<div id=container><div id=inline_block></div><br>text</div>
<script>
document.body.offsetLeft;
container.appendChild(document.createTextNode("new"));
inline_block.innerText = "PASS if no overlap";
</script>