Creates an element with the specified namespace URI and qualified name.


<var>element</var> = <var>document</var>.createElementNS(<var>namespaceURI</var>, <var>qualifiedName</var>);
  • element is the created element.
  • namespaceURI is a string that specifies the namespace URI to associate with the element. The namespaceURI property of the created element is initialized with the value of namespaceURI. (see section below for "Valid Namespace URI's")
  • qualifiedName is a string that specifies the type of element to be created. The nodeName property of the created element is initialized with the value of qualifiedName

Valid Namespace URI's

  • HTML - Use
  • SVG - Use
  • XBL - Use
  • XUL - Use


This creates a new <div> element in the XHTML namespace and appends it to the vbox element. Although this is not an extremely useful XUL document, it does demonstrate the use of elements from two different namespaces within a single document:

<?xml version="1.0"?>
<page xmlns=""
      title="||Working with elements||"

<script type="text/javascript"><![CDATA[
 var container;
 var newdiv;
 var txtnode;

 function init(){
   container = document.getElementById("ContainerBox");
   newdiv = document.createElementNS("","div");
   txtnode = document.createTextNode("This is text that was constructed dynamically with createElementNS and createTextNode then inserted into the document using appendChild.");


 <vbox id='ContainerBox' flex='1'>
   The script on this page will add dynamic content below:



The example given above uses inline script which is not recommended in XHTML documents. This particular example is actually an XUL document with embedded XHTML, however, the recommendation still applies. Inline script does not cause any problems for this short example, however, for any serious work you should learn about Properly Using CSS and JavaScript in XHTML Documents.

To create an element without specifying a namespace URI, use the createElement method.


See also


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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.

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