<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
<style>
#borderimg1 {
border: 10px solid transparent;
padding: 15px;
-webkit-border-image: url(border.png) 30 round; /* Safari 3.1-5 */
-o-border-image: url(border.png) 30 round; /* Opera 11-12.1 */
border-image: url(border.png) 30 round;
}
#borderimg2 {
border: 10px solid transparent;
padding: 15px;
-webkit-border-image: url(border.png) 30 stretch; /* Safari 3.1-5 */
-o-border-image: url(border.png) 30 stretch; /* Opera 11-12.1 */
border-image: url(border.png) 30 stretch;
}
</style>
</head>
<body>
<p>border-image 属性用于指定一个元素的边框图像。</p>
<p id="borderimg1">在这里，图像平铺（重复），以填补该地区。</p>
<p id="borderimg2">在这里，图像被拉伸以填补该地区</p>
<p>这是原始图片:</p><img src="/images/border.png">
<p><b>注意:</b> Internet Explorer 10 及更早的版本不支持 border-image 属性。</p>
</body>
</html>
出处：https://www.runoob.com/cssref/css3-pr-border-image.html