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Element: setAttributeNS() method

setAttributeNS adds a new attribute or changes the value of an attribute with the given namespace and name.

Syntax

js

setAttributeNS(namespace, name, value)

Parameters

  • namespace is a string specifying the namespace of the attribute.
  • name is a string identifying the attribute by its qualified name; that is, a namespace prefix followed by a colon followed by a local name.
  • value is the desired string value of the new attribute.

Return value

None (undefined).

Examples

js

let d = document.getElementById("d1");
d.setAttributeNS(
  "http://www.mozilla.org/ns/specialspace",
  "spec:align",
  "center",
);

Notes

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 -

setAttributeNS is the only method for namespaced attributes which expects the fully qualified name, i.e. "namespace:localname".

Specifications

Specification
DOM Standard
# ref-for-dom-element-setattributens①

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
setAttributeNS 1 12 1 9 ≤12.1 1 4.4 18 4 ≤12.1 1 1.0

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https://developer.mozilla.org/en-US/docs/Web/API/Element/setAttributeNS