Element.setAttributeNS()

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

Syntax

element.setAttributeNS(namespace, name, value)

• 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.

Example

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

Notes

DOM methods dealing with element's attributes:

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

Specification

DOM Level 2 Core: setAttributeNS

DOM-Level-2-Core: glossary qualified name

Browser compatibility