XML DOM Tutorial
DOM HOMEDOM Introduction
DOM Nodes
DOM Node Tree
DOM Parser
DOM Load Function
DOM Methods
DOM Accessing
DOM Node Info
DOM Node List
DOM Traversing
DOM Browsers
DOM Navigating
Manipulate Nodes
DOM Get ValuesDOM Change Nodes
DOM Remove Nodes
DOM Replace Nodes
DOM Create Nodes
DOM Add Nodes
DOM Clone Nodes
DOM XMLHttpRequest
XML DOM Reference
DOM Node TypesDOM Node
DOM NodeList
DOM NamedNodeMap
DOM Document
DOM DocumentImpl
DOM DocumentType
DOM ProcessingInstr
DOM Element
DOM Attribute
DOM Text
DOM CDATA
DOM Comment
DOM XMLHttpRequest
DOM ParseError Obj
DOM Parser Errors
DOM Summary
XML DOM Examples
DOM ExamplesDOM Validator
XML DOM - Properties and Methods
Properties and methods define the programming interface to the XML DOM.
Programming Interface
The DOM models XML as a set of node objects. The nodes can be accessed with JavaScript or other programming languages. In this tutorial we use JavaScript.
The programming interface to the DOM is defined by a set standard properties and methods.
Properties are often referred to as something that is (i.e. nodename is "book").
Methods are often referred to as something that is done (i.e. delete "book").
XML DOM Properties
These are some typical DOM properties:
- x.nodeName - the name of x
- x.nodeValue - the value of x
- x.parentNode - the parent node of x
- x.childNodes - the child nodes of x
- x.attributes - the attributes nodes of x
Note: In the list above, x is a node object.
XML DOM Methods
- x.getElementsByTagName(name) - get all elements with a specified tag name
- x.appendChild(node) - insert a child node to x
- x.removeChild(node) - remove a child node from x
Note: In the list above, x is a node object.
Example
The JavaScript code to get the text from the first <title> element in books.xml:
txt=xmlDoc.getElementsByTagName("title")[0].childNodes[0].nodeValue
After the execution of the statement, txt will hold the value "Everyday Italian"
Explained:
- xmlDoc - the XML DOM object created by the parser.
- getElementsByTagName("title")[0] - the first <title> element
- childNodes[0] - the first child of the <title> element (the text node)
- nodeValue - the value of the node (the text itself)
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