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

<h1>Element 对象</h1>

<h2>innerHTML 属性</h2>

<ul id="myList">
  <li>Coffee</li>
  <li>Tea</li>
</ul>

<p>ul 元素 "myList" 的 HTML 内容是:</p>
<p id="demo"></p>

<script>
let html = document.getElementById("myList").innerHTML;
document.getElementById("demo").innerHTML = html;
</script>

</body>
</html>
运行结果: