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js-dom笔记中的nodetype问题 #17

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Cn-0kr opened this issue Jul 6, 2024 · 0 comments
Open

js-dom笔记中的nodetype问题 #17

Cn-0kr opened this issue Jul 6, 2024 · 0 comments

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@Cn-0kr
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Cn-0kr commented Jul 6, 2024

佬好！
在js的dom笔记中我有一个疑问：

<body>
  <div id="box">
    <p>我是段落A</p>
    <p id="para">我是段落B</p>
    <p>我是段落C</p>
  </div>

  <script>
    var box = document.getElementById('box');
    var para = document.getElementById('para');
    console.log(box.firstChild.nodeType);

这里nodetype的输出是3，但是我并不明白是为什么。于是我去询问了下gpt，得到了答案：
根据W3C标准，nodeType 的值定义如下：

1 - Element 节点
2 - Attribute 节点（已废弃）
3 - Text 节点
4 - CDATASection 节点（仅在 XML 中有效）
5 - EntityReference 节点（已废弃）
6 - Entity 节点（已废弃）
7 - ProcessingInstruction 节点
8 - Comment 节点
9 - Document 节点
10 - DocumentType 节点
11 - DocumentFragment 节点
12 - Notation 节点（已废弃）
第一个节点是多出的空行text，因此返回3.我觉得这里的笔记好像没有讲到nodetype对应的值的问题，因此拉了一个issue，希望您能看到！！
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