<!DOCTYPE html>
<meta charset="utf-8">
<title>href - filter element reference</title>
<body>
  <svg width="300" height="300" viewBox="0 0 300 300"
       xmlns:xlink="http://www.w3.org/1999/xlink">
    <filter id="blurMe">
      <feGaussianBlur in="SourceGraphic" stdDeviation="5" />
    </filter>
    <circle cx="60" cy="60" r="50" fill="green" filter="url(#blurMe)" />
  </svg>
</body>
