Object built-in object

Object XmlProcessingInstruction

XmlProcessingInstruction object represents xml processing instruction

Inheritance

Member attribute

target

String, returns the target of this processing instruction

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readonly String XmlProcessingInstruction.target;

data

String, set or return the content of this processing instruction

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String XmlProcessingInstruction.data;

nodeType

Integer, returns the node type of the node

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readonly Integer XmlProcessingInstruction.nodeType;

The nodeType of different objects will return different values:


nodeName

String, returns the name of the node, according to its type

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readonly String XmlProcessingInstruction.nodeName;

The nodeName of different objects will return different values:


nodeValue

String, returns the name of the node, according to its type

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String XmlProcessingInstruction.nodeValue;

The nodeName of different objects will return different values:


ownerDocument

XmlDocument , returns the root element of the node ( XmlDocument object)

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readonly XmlDocument XmlProcessingInstruction.ownerDocument;

parentNode

XmlNode , can return the parent node of a node

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readonly XmlNode XmlProcessingInstruction.parentNode;

childNodes

XmlNodeList , returns the node list of the child nodes of the specified node

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readonly XmlNodeList XmlProcessingInstruction.childNodes;

firstChild

XmlNode , returns the first child node of the node

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readonly XmlNode XmlProcessingInstruction.firstChild;

lastChild

XmlNode , returns the last child node of the node

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readonly XmlNode XmlProcessingInstruction.lastChild;

previousSibling

XmlNode , returns the node immediately before a node (at the same tree level), if there is no such node, then this property returns null

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readonly XmlNode XmlProcessingInstruction.previousSibling;

nextSibling

XmlNode , returns the node immediately after an element (in the same tree level), if there is no such node, the attribute returns null

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readonly XmlNode XmlProcessingInstruction.nextSibling;

Member function

hasChildNodes

Check if there is a child node

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Boolean XmlProcessingInstruction.hasChildNodes();

Return result:

  • Boolean , returns true if there are any child nodes, otherwise returns false

normalize

Merge adjacent Text nodes and delete empty Text nodes

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XmlProcessingInstruction.normalize();

This method will traverse all the descendants of the current node, by deleting the empty Text node, has merged all adjacent Text nodes to normalize the document. This method is useful for simplifying the structure of the document tree after inserting or deleting nodes.


cloneNode

Create an exact copy of the specified node

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XmlNode XmlProcessingInstruction.cloneNode(Boolean deep = true);

Call parameters:

  • deep : Boolean, whether to deep copy, when true, the cloned node will clone all the child nodes of the original node

Return result:

This method will copy and return a copy of the node that called it. If the parameter passed to it is true, it will also recursively copy all the descendants of the current node. Otherwise, it only copies the current node. The returned node does not belong to the document tree, and its parentNode attribute is null. When copying an Element node, all its attributes will be copied.


lookupPrefix

Returns the prefix matching the specified namespace URI on the current node

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String XmlProcessingInstruction.lookupPrefix(String namespaceURI);

Call parameters:

  • namespaceURI : String, specifies the matching namespace URI

Return result:

  • String , returns the matched prefix, if not matched, returns null

lookupNamespaceURI

Returns the namespace URI matching the specified prefix on the current node

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String XmlProcessingInstruction.lookupNamespaceURI(String prefix);

Call parameters:

  • prefix : String, specify the matching prefix

Return result:

  • String , returns the matching namespace URI, returns null if it does not match

insertBefore

Insert a new child node before the existing child node

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XmlNode XmlProcessingInstruction.insertBefore(XmlNode newChild, XmlNode refChild);

Call parameters:

  • newChild : XmlNode , insert a new node
  • refChild : XmlNode , insert a new node before this node

Return result:

If newChild already exists in the document tree, it will be deleted from the document tree and then reinserted in its new location. Nodes from one document (or nodes created by one document) cannot be inserted into another document. In other words, the ownerDocument property of newChild must be the same as the ownerDocument property of the current node.


insertAfter

Insert a new child node after the existing child node

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XmlNode XmlProcessingInstruction.insertAfter(XmlNode newChild, XmlNode refChild);

Call parameters:

  • newChild : XmlNode , insert a new node
  • refChild : XmlNode , insert a new node after this node

Return result:

If newChild already exists in the document tree, it will be deleted from the document tree and then reinserted in its new location. Nodes from one document (or nodes created by one document) cannot be inserted into another document. In other words, the ownerDocument property of newChild must be the same as the ownerDocument property of the current node.


appendChild

Add a new child node to the end of the node's child node list

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XmlNode XmlProcessingInstruction.appendChild(XmlNode newChild);

Call parameters:

  • newChild : XmlNode , specify the added node

Return result:

  • XmlNode , return this new child node

If newChild already exists in the document tree, it will be deleted from the document tree and then reinserted in its new location. Nodes from one document (or nodes created by one document) cannot be inserted into another document. In other words, the ownerDocument property of newChild must be the same as the ownerDocument property of the current node.


replaceChild

Replace one child node with another

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XmlNode XmlProcessingInstruction.replaceChild(XmlNode newChild, XmlNode oldChild);

Call parameters:

  • newChild : XmlNode , specify a new node
  • oldChild : XmlNode , specify the node to be replaced

Return result:

  • XmlNode , if the replacement is successful, this method can return the replaced node, if the replacement fails, it returns null

If newChild already exists in the document tree, it will be deleted from the document tree and then reinserted in its new location. Nodes from one document (or nodes created by one document) cannot be inserted into another document. In other words, the ownerDocument property of newChild must be the same as the ownerDocument property of the current node.


removeChild

Remove a node from the list of child nodes

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XmlNode XmlProcessingInstruction.removeChild(XmlNode oldChild);

Call parameters:

  • oldChild : XmlNode , specify the node to be deleted

Return result:

  • XmlNode , if the deletion is successful, this method can return the deleted node, if it fails, it returns null

toString

Returns the string representation of the object, generally returns "[Native Object]", the object can be reimplemented according to its own characteristics

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String XmlProcessingInstruction.toString();

Return result:

  • String , returns a string representation of the object

toJSON

Returns the JSON format representation of the object, generally returns a collection of readable attributes defined by the object

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Value XmlProcessingInstruction.toJSON(String key = "");

Call parameters:

  • key : String, unused

Return result:

  • Value , returns a value containing JSON serializable