Introduction to html dom nodes (nodeName, nodeValue, nodeType)

For beginners, the functions and values of the nodeName, nodeValue, and nodeType attributes in the html dom are not very clear. The information below contains detailed information about nodes for your reference.

Node Information

Each node has attributes related to certain node information. These attributes are:

• NodeName (node name)
• NodeValue)
• NodeType (node type)

NodeName

The nodeName attribute contains the name of a node.

• The nodeName of the element node is the label name.
• The nodeName of the attribute node is the attribute name.
• The nodeName of the text node is always # text
• The nodeName of the document node is always # document

Note: The Tag Name of the XML element contained by nodeName is always capitalized.

NodeValue

For text nodes, the nodeValue attribute contains text.

For an attribute node, the nodeValue attribute contains the attribute value.

The nodeValue attribute is unavailable for document nodes and element nodes.

NodeType

The nodeType attribute returns the node type.

The most important node types are:

	Node Type
Element	1
Attribute	2
Text	3
Note	8
Document	9

 

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