Document: createElementNS() method
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Creates an element with the specified namespace URI and qualified name.
To create an element without specifying a namespace URI, use the
createElement()
method.
Syntax
createElementNS(namespaceURI, qualifiedName)
createElementNS(namespaceURI, qualifiedName, options)
Parameters
namespaceURI
-
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 Valid Namespace URIs. qualifiedName
-
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. options
Optional-
An optional
ElementCreationOptions
object containing a single property namedis
, whose value is the tag name for a custom element previously defined usingcustomElements.define()
. For backwards compatibility with previous versions of the Custom Elements specification, some browsers will allow you to pass a string here instead of an object, where the string's value is the custom element's tag name. See Extending native HTML elements for more information on how to use this parameter.The new element will be given an
is
attribute whose value is the custom element's tag name. Custom elements are an experimental feature only available in some browsers.
Return value
The new Element
.
Exceptions
NamespaceError
DOMException
-
Thrown if the
namespaceURI
value is not a valid namespace URI. InvalidCharacterError
DOMException
-
Thrown if the
qualifiedName
value is not a valid XML name; for example, it starts with a number, hyphen, or period, or contains characters other than alphanumeric characters, underscores, hyphens, or periods.
Important Namespace URIs
Examples
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="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
xmlns:html="http://www.w3.org/1999/xhtml"
title="||Working with elements||"
onload="init()">
<script type="application/javascript"><![CDATA[
let container;
let newDiv;
let textNode;
function init(){
container = document.getElementById("ContainerBox");
newDiv = document.createElementNS("http://www.w3.org/1999/xhtml", "div");
textNode = document.createTextNode("This is text that was constructed dynamically with createElementNS and createTextNode then inserted into the document using appendChild.");
newDiv.appendChild(textNode);
container.appendChild(newDiv);
}
]]></script>
<vbox id="ContainerBox" flex="1">
<html:div>
The script on this page will add dynamic content below:
</html:div>
</vbox>
</page>
Note: 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.
Specifications
Specification |
---|
DOM Standard # ref-for-dom-document-createelementns① |
Browser compatibility
BCD tables only load in the browser