<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Reference</title>
<style>
.clamp {
display: -webkit-box;
-webkit-box-orient: horizontal;
font: 16px / 32px serif;
white-space: pre;
padding: 4px 0;
background-color: yellow;
writing-mode: vertical-rl;
}
</style>
<div class="clamp">Line 1
Line 2
Line 3
Line 4
Line 5</div>