<!DOCTYPE html>
<meta charset="utf-8">
<title>href - use element reference</title>
<body>
  <svg style="display: none">
    <rect id='refRect' style="fill: red" width="100" height="100" />
  </svg>
  <svg width="300" height="300" viewBox="0 0 300 300"
       xmlns:xlink="http://www.w3.org/1999/xlink">
    <use xlink:href="#refRect"/>
  </svg>
</body>