<!DOCTYPE html>
<title>Test decorating box when the first child has `vertical-align`</title>
<link rel="help" href="https://drafts.csswg.org/css-text-decor-3/#decorating-box">
<link rel="match" href="reference/text-decoration-decorating-box-001-ref.html">
<div>abc
  <u>
    <span style="vertical-align: -10px; color: transparent">x</span>
    def
  </u>
</div>
