Web/API/Element/setAttributeNodeNS

setAttributeNodeNS adds a new namespaced attribute node to an element.

Syntax

replacedAttr = element.setAttributeNodeNS(attributeNode) 

• replacedAttr is the replaced attribute node, if any, returned by this function.
• attributeNode is an Attr node.

Example

// <div id="one" xmlns:myNS="http://www.mozilla.org/ns/specialspace" 
//            myNS:special-align="utterleft">one</div> 
// <div id="two">two</div> 


var myns = "http://www.mozilla.org/ns/specialspace"; 
var d1 = document.getElementById("one"); 
var d2 = document.getElementById("two"); 
var a = d1.getAttributeNodeNS(myns, "special-align"); 
d2.setAttributeNodeNS(a.cloneNode(true));
alert(d2.attributes[1].value) // returns: `utterleft'

Notes

If the specified attribute already exists on the element, then that attribute is replaced with the new one and the replaced one is returned.

Note that if you try to set without cloning the node, Mozilla gives an NS_ERROR_DOM_INUSE_ATTRIBUTE_ERR "Attribute already in use" error, as the DOM requires cloning for Attr to be reused (unlike other Nodes which can be moved).

DOM methods dealing with element's attributes:

Not namespace-aware, most commonly used methods	Namespace-aware variants (DOM Level 2)	DOM Level 1 methods for dealing with Attr nodes directly (seldom used)	DOM Level 2 namespace-aware methods for dealing with Attr nodes directly (seldom used)
setAttribute (DOM 1)	setAttributeNS	setAttributeNode	setAttributeNodeNS
getAttribute (DOM 1)	getAttributeNS	getAttributeNode	getAttributeNodeNS
hasAttribute (DOM 2)	hasAttributeNS	-	-
removeAttribute (DOM 1)	removeAttributeNS	removeAttributeNode	-

Specifications

Specification	Status	Comment
DOMThe definition of 'document.setAttributeNodeNS' in that specification.	Living Standard

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
setAttributeNodeNS	Chrome Full support Yes	Edge Full support 12 Notes' Full support 12 Notes' Notes' Returns a ClientRectList with ClientRect objects (which do not contain x and y properties) instead of DOMRect objects.	Firefox Full support Yes	IE Full support Yes Notes' Full support Yes Notes' Notes' Returns a ClientRectList with ClientRect objects (which do not contain x and y properties) instead of DOMRect objects.	Opera Full support Yes	Safari Full support 6	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes

Legend

Full support  

Full support

See implementation notes.'

See implementation notes.

Element.setAttributeNodeNS() by Mozilla Contributors is licensed under CC-BY-SA 2.5.