Node.nodeType | Web API

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句法
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只读 Node.nodeType property is an integer that identifies what the node is. It distinguishes different kind of nodes from each other, such as 元素 , text and comments .

句法

var type = node.nodeType;

Returns an integer which specifies the type of the node. Possible values are listed in Node type constants .

常量

Node type constants

常量	值	描述
`Node.ELEMENT_NODE`	`1`	`元素` node like `<p>` or `<div>` .
`Node.TEXT_NODE`	`3`	实际 `文本` inside an `元素` or `Attr` .
`Node.CDATA_SECTION_NODE`	`4`	A `CDATASection` ，譬如 `<!CDATA[[ … ]]>` .
`Node.PROCESSING_INSTRUCTION_NODE`	`7`	A `ProcessingInstruction` of an XML document, such as `<?xml-stylesheet … ?>` .
`Node.COMMENT_NODE`	`8`	A `注释` node, such as `<!-- … -->` .
`Node.DOCUMENT_NODE`	`9`	A `Document` 节点。
`Node.DOCUMENT_TYPE_NODE`	`10`	A `DocumentType` node, such as `<!DOCTYPE html>` .
`Node.DOCUMENT_FRAGMENT_NODE`	`11`	A `DocumentFragment` 节点。

Deprecated node type constants

The following constants have been deprecated and should not be used anymore.

常量	值	Description
`Node.ATTRIBUTE_NODE`	2	`属性` of an `元素` . Attributes no longer implement the `节点` interface as of DOM4 .
`Node.ENTITY_REFERENCE_NODE`	5	An XML Entity Reference node, such as `&foo;` . Removed in DOM4 .
`Node.ENTITY_NODE`	6	An XML `<!ENTITY …>` node. Removed in DOM4 .
`Node.NOTATION_NODE`	12	An XML `<!NOTATION …>` node. Removed in DOM4 .

范例

Different types of nodes

document.nodeType === Node.DOCUMENT_NODE; // true
document.doctype.nodeType === Node.DOCUMENT_TYPE_NODE; // true
document.createDocumentFragment().nodeType === Node.DOCUMENT_FRAGMENT_NODE; // true
var p = document.createElement("p");
p.textContent = "Once upon a time…";
p.nodeType === Node.ELEMENT_NODE; // true
p.firstChild.nodeType === Node.TEXT_NODE; // true

注释

This example checks if the first node inside the document element is a comment, and displays a message if not.

var node = document.documentElement.firstChild;
if (node.nodeType !== Node.COMMENT_NODE) {
  console.warn("You should comment your code!");
}

规范

规范	状态	注释
DOM The definition of 'Node.nodeType' in that specification.	实时标准	弃用 `ATTRIBUTE_NODE` , `ENTITY_REFERENCE_NODE` and `NOTATION_NODE` 类型。
DOM (文档对象模型) 3 级核心规范 The definition of 'Node.nodeType' in that specification.	过时	No changes.
DOM (文档对象模型) 级别 2 核心规范 The definition of 'Node.nodeType' in that specification.	过时	No changes.
DOM (文档对象模型) 1 级规范 The definition of 'Node.nodeType' in that specification.	过时	初始定义。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`nodeType`	Chrome 1	Edge 12	Firefox 1	IE 6	Opera 7	Safari 1.1	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0

图例

完整支持

元数据

最后修改： Mar 18, 2019

DOM (文档对象模型)
节点
特性
1. baseURI
2. baseURIObject
3. childNodes
4. firstChild
5. isConnected
6. lastChild
7. ~~localName~~
8. ~~namespaceURI~~
9. nextSibling
10. nodeName
11. ~~nodePrincipal~~
12. nodeType
13. nodeValue
14. outerText
15. ownerDocument
16. parentElement
17. parentNode
18. ~~prefix~~
19. previousSibling
20. ~~rootNode~~
21. textContent
方法
继承：
1. EventTarget
DOM 相关页面

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句法

常量

Node type constants

Deprecated node type constants

范例

Different types of nodes

注释

规范

浏览器兼容性

图例

相关话题