LayoutTests/fast/inline/missing-content-with-preserve-breaks.html

<style>
#container { 
  text-wrap: nowrap;
  white-space-collapse: preserve-breaks;
}
</style><div id=container><div id=content>PASS if
 this content is fully visible</div></div>
<script>
document.body.offsetHeight;
content.remove();

document.body.offsetHeight;
container.style.whiteSpace = "normal";
let same_content = document.createElement("div");
same_content.appendChild(document.createTextNode("PASS if\n this content is fully visible"));
container.appendChild(same_content);
</script>