代码示例:(标识:jsck_doc_head_1)
<!DOCTYPE html>
<html>
<head>
  <title>我的标题</title>
</head>

<body>
<h1>Document 对象</h1>

<h2>head 属性</h2>

<p>head 属性的标签名称是:</p>

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

<script>
let tag = document.head.tagName;
document.getElementById("demo").innerHTML = tag;
</script>

</body>
</html>
运行结果: