Js traversal subnode subelement attachment attributes and method_javascript skills

There are many ways to traverse sub-node sub-elements. This example is implemented using js. The sample code and attribute method are provided. For more information, see The Code is as follows:

// Delete all child nodes before adding a child node

Var usernameEle = document. getElementById ("username ");
Var childs = usernameEle. childNodes;
For (var I = childs. length-1; I> = 0; I --){
UsernameEle. removeChild (childs [I]);
}
Var username = document. createTextNode (obj. username );
UsernameEle. appendChild (username );

Attribute:

NextSibling returns the next sibling node of the current node (read-only)
Previussibling returns the previous sibling node of this node (read-only)
ParentNode returns the parent node (read-only)
List of child nodes of the childNodes storage node (read-only)
NodeValue returns the node text (read/write)
Text returns the Text content of the node and its descendants (read/write)
NodeName: return the node name (read-only)

Attribute list of the Attributes storage node (read-only)
DataType returns the Data Type of this node
Definition defines nodes in DTD or XML mode (read-only)
Doctype specifies the file type node (read-only)
DocumentElement returns the root element of the document (read/write)
FirstChild returns the first child node of the current node (read-only)
Implementation returns the XMLDOMImplementation object
LastChild returns the last child node of the current node (read-only)
NodeType return node type (read-only)
NodeTypedValue stores node values (read/write)
OwnerDocument returns the root document containing this node (read-only)
Parsed: returns whether the node and Its subnodes have been Parsed (read-only)
Prefix returns the namespace Prefix (read-only)
PreserveWhiteSpace specifies whether to retain white space (read/write)
Url returns the URL of the recently loaded XML document (read-only)
Xml returns the XML Representation of the node and its descendants (read-only)

Method:

GetElementsByTagName returns the set of elements with the specified name.
AppendChild adds a new subnode to the current node, which is placed after the last subnode
CreateElement: Create an element node
CreateTextNode: Create a text node that includes the given data
RemoveChild deletes a specified subnode from the subnode list.
HasChildNodes: returns whether the current node has subnodes.

CloneNode returns the copy of the current node
CreateAttribute
CreateCDATASection create CDATA segments that contain the given data
CreateComment create a comment Node
CreateDocumentFragment create a DocumentFragment object
CreateEntityReference: Create an EntityReference object
CreateNode creates nodes of the given type, name, and namespace.
CreatePorcessingInstruction
InsertBefore inserts a subnode before a specified Node
Load import the XML document at the specified position
LoadXML import the XML document of the specified string
ReplaceChild replaces the specified child node from the child node list
Save the XML file to the specified Node
SelectNodes matches the specified node and returns the list of matched nodes.
SelectSingleNode matches the specified node and returns the first matching node.
TransformNode converts nodes and their descendants using the specified style table.
TransformNodeToObject: Use the specified style sheet to convert nodes and their descendants to objects.