<style>
div {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 5;

  background-color: green;
  color: transparent;
  font-family: Ahem;
  font-size: 20px;  
}
</style>
<!-- PASS if the div stretches all the way to the bottom of the 5th line -->
<div>
first<br>
second<br>
third<br>
fourth<br>
fifth<br>
sixth<br>
seventh<br>
eighth<br>
ninth<br>
tenth
</div>
