<html>
<head>
<title>reference of svg-as-border-image</title>
<style type="text/css">
div {
  width: 100px;
  height: 100px;
  margin: 30px;
  border-width: 30px;
  border-style: solid;
  border-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg"><circle cx="50%" cy="50%" r="50%" fill="red"/></svg>') 5% stretch;
}
</style>
</head>
<body>
<div></div>
</body>
</html>