A brief discussion on the differences between nodeName, nodeValue, nodeType, typeof_javascript skills

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 a text node is always #text

The nodeName of a document node is always #document

nodeValue node value

For text nodes, the nodeValue attribute contains the text.

For attribute nodes, the nodeValue attribute contains the attribute value.

The nodeValue attribute is not available for document nodes and element nodes.

The nodeType attribute returns the type of node.

The most important node types are:

Element element1 attribute attr2 text text3 comments comments8 document document9 Supplement:

Value-element type

1-ELEMENT

2-ATTRIBUTE

3-TEXT

4-CDATA

5-ENTITY REFERENCE

6-ENTITY

7-PI (processing instruction)

8-COMMENT

9-DOCUMENT

10-DOCUMENT TYPE

11-DOCUMENT FRAGMENT

12-NOTATION

typeof

Returns a string representing the expression data type. Possible strings are: "number", "string", "boolean", "object", "function" and "undefined"

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