Web/API/NamedNodeMap

The NamedNodeMap interface represents a collection of Attr objects. Objects inside a NamedNodeMap are not in any particular order, unlike NodeList, although they may be accessed by an index as in an array.

A NamedNodeMap object is live and will thus be auto-updated if changes are made to its contents internally or elsewhere.

Although called NamedNodeMap, this interface doesn't deal with Node objects but with Attr objects, which were originally a specialized class of Node, and still are in some implementations.

Properties

This interface doesn't inherit any property.

NamedNodeMap.length Read only

Returns the amount of objects in the map.

Methods

This interface doesn't inherit any method.

NamedNodeMap.getNamedItem()

Returns a Attr, corresponding to the given name.

NamedNodeMap.setNamedItem()

Replaces, or adds, the Attr identified in the map by the given name.

NamedNodeMap.removeNamedItem()

Removes the Attr identified by the given map.

NamedNodeMap.item()

Returns the Attr at the given index, or null if the index is higher or equal to the number of nodes.

NamedNodeMap.getNamedItemNS()

Returns a Attr identified by a namespace and related local name.

NamedNodeMap.setNamedItemNS()

Replaces, or adds, the Attr identified in the map by the given namespace and related local name.

NamedNodeMap.removeNamedItemNS()

Removes the Attr identified by the given namespace and related local name.

Specifications

Specification	Status	Comment
DOMThe definition of 'NamedNodeMap' in that specification.	Living Standard	Deals with Attr instead of Node
Document Object Model (DOM) Level 3 Core SpecificationThe definition of 'NamedNodeMap' in that specification.	Obsolete	No change from Document Object Model (DOM) Level 2 Core Specification
Document Object Model (DOM) Level 2 Core SpecificationThe definition of 'NamedNodeMap' in that specification.	Obsolete	Added getNamedItemNS(), setNamedItemNS() and removeNamedItemNS()
Document Object Model (DOM) Level 1 SpecificationThe definition of 'NamedNodeMap' in that specification.	Obsolete	Initial definition

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
NamedNodeMap	Chrome Full support Yes	Edge Full support 12	Firefox Full support 34 Full support 34 No support 22 — 34 Alternate Name' Alternate Name' Uses the non-standard name: mozNamedAttrMap No support ? — 22	IE Full support Yes	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 34 Full support 34 No support 22 — 34 Alternate Name' Alternate Name' Uses the non-standard name: mozNamedAttrMap No support ? — 22	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
getNamedItem	Chrome Full support Yes	Edge Full support 12	Firefox Full support 34	IE ?	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 34	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
getNamedItemNS	Chrome Full support Yes	Edge Full support 12	Firefox Full support 34	IE ?	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 34	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
item	Chrome Full support Yes	Edge Full support 12	Firefox Full support 34	IE ?	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 34	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
length	Chrome Full support Yes	Edge Full support 12	Firefox Full support 34	IE ?	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 34	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
removeNamedItem	Chrome Full support Yes	Edge Full support 12	Firefox Full support 34	IE ?	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 34	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
removeNamedItemNS	Chrome Full support Yes	Edge Full support 12	Firefox Full support 34	IE ?	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 34	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
setNamedItem	Chrome Full support Yes	Edge Full support 12	Firefox Full support 34	IE ?	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 34	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
setNamedItemNS	Chrome Full support Yes	Edge Full support 12	Firefox Full support 34	IE ?	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 34	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes

Legend

Full support  

Full support

Compatibility unknown  

Compatibility unknown

Uses a non-standard name.'

Uses a non-standard name.

See also

• Element.attributes

NamedNodeMap by Mozilla Contributors is licensed under CC-BY-SA 2.5.