JS nodeType return type

JS nodeType return type
A friend just asked me a few days ago what is the concept of this js nodeType (as the bottom layer of the browser). In this article, I can explain it to you.

 

Record several common attributes in html dom:

NodeName, nodeValue, and nodeType contain information about nodes.
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:

Element type = node type
Element = "1
Attribute attr = "2
Text = 3
Comment comments = "8
Document = 9