Js DOM model operations

Nodes in the DOM model: Element nodes, text nodes, and attribute nodes
Example: <a href = "http://www.cnblogs.com/shuz”> private comment dotnet hut </a>
(1) a is an element node.
(2) "の dotnet hut" is a text node
(3) href = "http://www.cnblogs.com/shuz?is the worker Node
DOM node attributes

Attribute	Type	Description
NodeName	String	The node name, which is defined based on the node type.
NodeValue	String	Node value, defined based on the node type
NodeType	Number	Node type. 1 indicates an element node, 2 indicates an attribute node, and 3 indicates a text node.
FirstChild	Node	Point to the first node in the childNodes list
LastChild	Node	Point to the last node in the childNodes list
ChildNodes	NodeList	List of all child nodes. childNodes [I] can access node I + 1.
ParentNode	Node	Point to the parent node of the node. If it is already the root node, null is returned.
Previussibling	Node	Refers to the forward sibling node. If it is already the first node, null is returned.
NextSibling	Node	Point to the next sibling node. If it is already the last node, null is returned.
Attributes	NameNodeMap	An Attr object that contains an element feature. It is used only for element nodes.
ClassName	String	Node CSS class
InnerHTML	String	All content between a tag, including the Code itself

DOM Node Method
(1) Access Node:
[By tag name]
Document. getElementsByTagName (sTagName) method: returns a list of element nodes containing the same tag name.
[By tag id]
Document. getElementById (sElementId) method: returns the element node whose Id is the specified value.
[Access the previous node] compatible with IE and FireFox
(Custom)
Copy codeThe Code is as follows:
Function prevSib (oNode ){
Var oTempFirstNode = oNode. parentNode. firstChild;
// Determine whether the node is the first node. If yes, null is returned.
If (oNode = oTempFirstNode)
Return null;
Var oTempNode = oNode. previussibling;
// Search for the previous sibling nodes one by one until the element nodes are found.
While (oTempNode. nodeType! = 1 & oTempNode. previussibling! = Null)
OTempNode = oTempNode. previussibling;
// Three-object operator. If it is an element node, the node itself is returned; otherwise, null is returned.
Return (oTempNode. nodeType = 1 )? : OTempNode: null;
}

[Access to the next node] compatible with IE and FireFox
(Custom)
Copy codeThe Code is as follows:
Function nextSib (oNode ){
Var oTempLastNode = oNode. parentNode. lastChild;
// Determine whether the node is the last node. If yes, null is returned.
If (oNode = oTempLastNode)
Return null;
Var oTempNode = oNode. nextSibling;
// Search for the following sibling nodes one by one until the element nodes are found.
While (oTempNode. nodeType! = 1 & oTempNode. nextSibling! = Null)
OTempNode = oTempNode. nextSibling;
// Three-object operator. If it is an element node, the node itself is returned; otherwise, null is returned.
Return (oTempNode. nodeType = 1 )? OTempNode: null;
}

(2) determine whether a node has a subnode:
NodeObject. hasChildNodes () method: returns true if childNodes contains one or more nodes.
(3) set node attributes:
EleNode. getAttribute (attrNode) method: returns the attrNode attribute of the eleNode element.
EleNode. setAttribute (attrNode, sNewValue) method: Set the attrNode attribute value of the eleNode element to sNewValue.
(4) create a node:
Document. createElement (eleNode) method: Create an element node eleNode
Document. createTextNode (textNode) method: Create a text node textNode
Document. createDocumentFragment () method: create a document fragment Node
(5) Add a node:
EleNode. appendChild (textNode) method: add the textNode node to the end of childNodes
(6) Delete A node:
ONode. parentNode. removeChild (oNode) method: Delete the oNode node from childNodes
(7) Replacing nodes:
ONode. parentNode. replaceChild (oNewNode, oOldNode) method: replace oOldNode in childNodes with oNewNode
(8) insert a node before a specific node:
OTargetNode. parentNode. insertBefore (oNewNode, oTargetNode) method: insert the oNewNode node before the oTargetNode node in childNodes
(9) insert a node after a specific node:
(Custom) oTargetNode. parentNode. insertAfter (oNewNode, oTargetNode) method: insert the oNewNode node after the oTargetNode node in childNodes
Copy codeThe Code is as follows:
Function insertAfter (oNewNode, oTargetNode ){
Var oParentNode = oTargetNode. parentNode;
If (oParentNode. lastChild = oTargetNode)
OParentNode. appendChild (oNewNode );
Else
OParentNode. insertBefore (oNewNode, oTargetNode. nextSibling );
}