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XML Tutorial

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XML DOM

DOM Introduction DOM Nodes DOM Accessing DOM Node Info DOM Node List DOM Traversing DOM Navigating DOM Get Values DOM Change Nodes DOM Remove Nodes DOM Replace Nodes DOM Create Nodes DOM Add Nodes DOM Clone Nodes DOM Examples

XPath Tutorial

XPath Introduction XPath Nodes XPath Syntax XPath Axes XPath Operators XPath Examples

XSLT Tutorial

XSLT Introduction XSL Languages XSLT Transform XSLT <template> XSLT <value-of> XSLT <for-each> XSLT <sort> XSLT <if> XSLT <choose> XSLT Apply XSLT on the Client XSLT on the Server XSLT Edit XML XSLT Examples

XQuery Tutorial

XQuery Introduction XQuery Example XQuery FLWOR XQuery HTML XQuery Terms XQuery Syntax XQuery Add XQuery Select XQuery Functions

XML DTD

DTD Introduction DTD Building Blocks DTD Elements DTD Attributes DTD Elements vs Attr DTD Entities DTD Examples

XSD Schema

XSD Introduction XSD How To XSD <schema> XSD Elements XSD Attributes XSD Restrictions XSD Complex Elements XSD Empty XSD Elements-only XSD Text-only XSD Mixed XSD Indicators XSD <any> XSD <anyAttribute> XSD Substitution XSD Example

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XSD String XSD Date/Time XSD Numeric XSD Misc XSD Reference

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XML Services XML WSDL XML SOAP XML RDF XML RSS

References

DOM Node Types DOM Node DOM NodeList DOM NamedNodeMap DOM Document DOM Element DOM Attribute DOM Text DOM CDATA DOM Comment DOM XMLHttpRequest DOM Parser XSLT Elements XSLT/XPath Functions

XML DOM Get Node Values


The nodeValue property is used to get the text value of a node.

The getAttribute() method returns the value of an attribute.


Get the Value of an Element

In the DOM, everything is a node. Element nodes do not have a text value.

The text value of an element node is stored in a child node. This node is called a text node.

To retrieve the text value of an element, you must retrieve the value of the elements' text node.


The getElementsByTagName Method

The getElementsByTagName() method returns a node list of all elements, with the specified tag name, in the same order as they appear in the source document.

Suppose books.xml has been loaded into xmlDoc.

This code retrieves the first <title> element:

var x = xmlDoc.getElementsByTagName("title")[0];

The ChildNodes Property

The childNodes property returns a list of an element's child nodes.

The following code retrieves the text node of the first <title> element:

x = xmlDoc.getElementsByTagName("title")[0];
y = x.childNodes[0];

The nodeValue Property

The nodeValue property returns the text value of a text node.

The following code retrieves the text value of the text node of the first <title> element:

Example

x = xmlDoc.getElementsByTagName("title")[0];
y = x.childNodes[0];
z = y.nodeValue;

Result in z: "Everyday Italian"



Complete Example

Example

<!DOCTYPE html>
<html>
<body>

<p id="demo"></p>

<script>
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
    if (this.readyState == 4 && this.status == 200) {
        myFunction(this);
    }
};
xhttp.open("GET", "books.xml", true);
xhttp.send();

function myFunction(xml) {
    var xmlDoc = xml.responseXML;
    var x = xmlDoc.getElementsByTagName('title')[0];
    var y = x.childNodes[0];
    document.getElementById("demo").innerHTML = y.nodeValue;
}
</script>

</body>
</html>
Try it Yourself »

Loop through all <title> elements: Try it Yourself


Get the Value of an Attribute

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.


Get an Attribute Value - getAttribute()

The getAttribute() method returns an attribute's value.

The following code retrieves the text value of the "lang" attribute of the first <title> element:

Example

x = xmlDoc.getElementsByTagName("title")[0];
txt = x.getAttribute("lang");
Try it Yourself »

Result in txt: "en"

Loop through all <book> elements and get their "category" attributes: Try it yourself


Get an Attribute Value - getAttributeNode()

The getAttributeNode() method returns an attribute node.

The following code retrieves the text value of the "lang" attribute of the first <title> element:

Example

x = xmlDoc.getElementsByTagName("title")[0];
y = x.getAttributeNode("lang");
txt = y.nodeValue;
Try it Yourself »

Result in txt = "en"

Loop through all <book> elements and get their "category" attributes: Try it Yourself