html运行实例（jsck_element_children

代码示例：（标识：jsck_element_children_3）

<!DOCTYPE html>
<html>
<body>
<h1>Element 对象</h1>

<h2>children 属性</h2>

<select id="mySelect" size="4">
  <option>Audi</option>
  <option>BMW</option>
  <option>Saab</option>
  <option>Volvo</option>
</select>

<p>select 元素的第三个子元素 (index 2) 的文本是：</p>

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

<script>
const collection = document.getElementById("mySelect").children;
document.getElementById("demo").innerHTML = collection[2].text;

</script>

</body>
</html>