代码示例:(标识:hdom_anchor_hreflang)
<!DOCTYPE html>
<html>
<body>

<p><a id="myAnchor" hreflang="zh-cn" href="http://www.sou-xun.com">sou-xun.com</a></p>

<p>单击按钮以显示上面链接的 hreflang 属性的值。</p>

<button onclick="myFunction()">试一试</button>

<p id="demo"></p>

<script>
function myFunction() {
  var x = document.getElementById("myAnchor").hreflang;
  document.getElementById("demo").innerHTML = x;
}
</script>

</body>
</html>
运行结果: