<!DOCTYPE html>
<!--
 | The "width" property does not apply.
 |   https://www.w3.org/TR/CSS21/visudet.html#inline-width
 -->
<html>
<head>
  <style>
    .non-replaced-inline {
      background-color: #f44336;
      display: inline;
      width: 100px;
    }
    .vertical-strut {
      display: inline-block;
      height: 100px;
    }
  </style>
</head>
<body>
  <span class="non-replaced-inline">
    <div class="vertical-strut"></div>
  </span>
</body>
</html>