javascript

Chapter 11: DOM Levels 2 and 3
These methods are used by passing in the namespace URI of the namespace to use (not the namespace
prefix), as shown in the following example.
//create a new SVG element
var svg = document.createElementNS(“http://www.w3.org/2000/svg”,”svg”);
//create new attribute for a random namespace
var att = document.createAttributeNS(“http://www.somewhere.com”, “random”);
//get all XHTML elements
var elems = document.getElementsByTagNameNS(“http://www.w3.org/1999/xhtml”, “*”);
The namespace - specific methods are necessary only when there are two or more namespaces in a given
document.
Changes to Element
The changes to Element in DOM Level 2 Core are mostly related to attributes. The following new
methods are introduced:
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getAttributeNS( namespaceURI , localName ) — Gets the attribute from the namespace
represented by namespaceURI and with a name of localName .
getAttributeNodeNS( namespaceURI , localName ) — Gets the attribute node from the
namespace represented by namespaceURI and with a name of localName .
getElementsByTagNameNS( namespaceURI , tagName ) — Returns a NodeList of descendant
elements with the given tagName that are also a part of the namespace indicated by
namespaceURI .
hasAttributeNS( namespaceURI , localName ) — Determines if the element has an attribute
from the namespace represented by namespaceURI and with a name of localName . Note: DOM
Level 2 Core also adds a hasAttribute() method for use without namespaces.
removeAttributeNS( namespaceURI , localName ) — Removes the attribute from the
namespace represented by namespaceURI and with a name of localName .
setAttributeNS( namespaceURI , qualifiedName , value ) — Sets the attribute from the
namespace represented by namespaceURI and with a name of qualifiedName equal to value.
setAttributeNodeNS( attNode ) — Sets the attribute node from the namespace represented
by namespaceURI .
These methods behave the same as their DOM Level 1 counterparts with the exception of the first
argument, which is always the namespace URI.
Changes to NamedNodeMap
The NamedNodeMap type also introduces the following methods for dealing with namespaces. Since
attributes are represented by a NamedNodeMap , these methods mostly apply to attributes.
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getNamedItemNS( namespaceURI , localName ) — Gets the item from the namespace
represented by namespaceURI and with a name of localName
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