Home Web Front-end HTML Tutorial DOM notes (2): Node interface_html/css_WEB-ITnose

DOM notes (2): Node interface_html/css_WEB-ITnose

Jun 24, 2016 am 11:52 AM

All nodes are represented using the Node interface. You can use many methods to obtain nodes, such as document.getElementsByTagName(), document.getElementsByName(), etc., which all return a NodeList object, and then obtain the node.

The corresponding attributes and amplification of nodes are defined in the Node interface:

1. Common attribute list of Node interface

属性名 数据类型 说明
nodeName DOMString 返回节点名
nodeValue DOMString 返回节点值
nodeType int 返回节点类型(见后文)
parentNode Node 返回当前节点的父节点
childNodes NodeList 返回当前节点的所有子节点
firstChild Node 返回当前节点的第一个子节点
lastChild Node 返回当前节点的最后一个子节点
previousSibling Node 返回当前节点的紧邻的前一个兄弟节点
nextSibling Node 返回当前节点的紧邻的后一个兄弟节点
attributes NamedNodeMap 返回当前节点的所有属性
ownerDocument Document 返回当前节点对应的Document对象
namespaceURI DOMString 返回当前节点所属命名空间的URI
prefix DOMString 返回当前节点所属命名空间的前缀
localName DOMString 返回当前节点限定名的本地部分

2. List of common methods of Node interface

方法名 数据类型 说明
appendChild Node 在末尾添加一个子节点
cloneNode Node 克隆一个子节点
hasAttributes Boolean 判断该节点是否有属性
hasChildNodes Boolean 判断该节点是否有子节点
insertBefore Node 在指定节点插入一个节点
isSupported Boolean 判断节点特定是否被支持
normalize Void 规格化节点
removeChild Node 删除一个子节点
replaceChild Node 替换一个子节点

3. Node type

In In a DOM document, each node belongs to a type. You can use the Node.nodeType property to obtain the node type. The DOM specification specifies 12 node types, which can be represented by constants defined by the Node interface or by numbers.

节点类型常量 数值表示 说明
ELEMENT_NODE 1 元素节点
ATTRIBUTE_NODE 2 属性节点
TEXT_NODE 3 文本节点
CDATA_SECTION_NODE 4 CDATA节点
ENTITY_REFERENCE_NODE 5 实体引用节点
ENTITY_NODE 6 实体节点
PROCESSING_INSTRUCTION_NODE 7 处理指令节点
COMMENT_NODE 8 注释节点
DOCUMENT_NODE 9 文档节点
DOCUMENT_TYPE_NODE 10 文档类型节点
DOCUMENT_FRAGMENT_NODE 11 文档片段节点
NOTATION_NODE 12 符号节点

PS: IE does not support constant representation, it is best to use numbers. The six most commonly used Node types: 1,2,3,8,9,11

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