Element.getAttributeNodeNS()

Returns the Attr node for the attribute with the given namespace and name.

Syntax

attributeNode = element.getAttributeNodeNS(namespace, nodeName)

attributeNode is the node for specified attribute.
namespace is a string specifying the namespace of the attribute.
nodeName is a string specifying the name of the attribute.

Notes

getAttributeNodeNS is more specific than getAttributeNode in that it allows you to specify attributes that are part of a particular namespace. The corresponding setter method is setAttributeNodeNS.

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
DOM Standard (DOM) # dom-element-getattributenodens

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
`getAttributeNodeNS`	1	12	1	9	≤12.1	1	1	18	4	≤12.1	1	1.0

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