From http://www.w3schools.com (Copyright Refsnes Data)
The nodeValue property is used to get the text value of a node.
The getAttribute() method returns the value of an attribute.
The examples below use the XML file
books.xml.
A function, loadXMLDoc(), in an external JavaScript is used to load the XML file.
Get
an element's value
This example uses the getElementsByTagname() method to get the first <title>
element in "books.xml"
Get an
attribute's value
This example uses the getAttribute() method to get the value of the "category"
attribute of the first <title> element in "books.xml".
In the DOM, everything is a node. Element nodes does not have a text value.
The text of an element node is stored in a child node. This node is called a text node.
The way to get the text of an element, is to get the value of the child node (text node).
The getElementsByTagName() method returns a node list containing all elements with the specified tag name in the same order as they appear in the source document.
The following code loads "books.xml" into xmlDoc using loadXMLDoc() and retrieves the first <title> element:
xmlDoc=loadXMLDoc("books.xml");
x=xmlDoc.getElementsByTagName("title")[0];
|
The childNodes property returns a list of child nodes. The <title> element has only one child node. It is a text node.
The following code retrieves the text node of the <title> element:
x=xmlDoc.getElementsByTagName("title")[0];
y=x.childNodes[0];
|
The nodeValue property returns the text value of the text node:
x=xmlDoc.getElementsByTagName("title")[0];
y=x.childNodes[0];
txt=y.nodeValue;
|
Result: txt = "Everyday Italian"
Loop through all <title> elements: Try it yourself
In the DOM, attributes are nodes. Unlike element nodes, attribute nodes have text values.
The way to get the value of an attribute, is to get its text value.
This can be done using the getAttribute() method or using the nodeValue property of the attribute node.
The getAttribute() method returns an attribute value.
The following code retrieves the text value of the "lang" attribute of the first <title> element:
xmlDoc=loadXMLDoc("books.xml");
txt=xmlDoc.getElementsByTagName("title")[0].getAttribute("lang");
|
Result: txt = "en"
Example explained:
Loop through all <book> elements and get their "category" attributes:
Try
it yourself
The getAttributeNode() method returns an attribute node.
The following code retrieves the text value of the "lang" attribute of the first <title> element:
xmlDoc=loadXMLDoc("books.xml");
x=xmlDoc.getElementsByTagName("title")[0].getAttributeNode("lang");
txt=x.nodeValue;
|
Result: txt = "en"
Example explained:
Loop through all <book> elements and get their "category" attributes: Try it yourself
From http://www.w3schools.com (Copyright Refsnes Data)