NamedNodeMap

In This Article

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

Feature	Chrome	Edge	Firefox (Gecko)	Internet Explorer	Opera	Safari
Basic support	(Yes)	(Yes)	(Yes)	(Yes)	(Yes)	(Yes)
Deals with `Attr` rather than `Node`	?	?	22 (22)^[1]	?	?	?

Feature	Android	Edge	Firefox Mobile (Gecko)	IE Mobile	Opera Mobile	Safari Mobile
Basic support	(Yes)	(Yes)	(Yes)	(Yes)	(Yes)	(Yes)
Deals with `Attr` rather than `Node`	?	?	22.0 (22)^[1]	?	?	?

[1] In Gecko 22 this interface was named mozNamedAttrMap. In Gecko 34 it was named back to NamedNodeMap.

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Contributors to this page: abbycar, bunnrf, Sebastianz, teoli, phoenix_in_the_sky, LouisLazaris, kscarfone, Prachi_Dighe, kohei.yoshino, Sheppy, stepnem, Brettz9

Last updated by: abbycar, Dec 2, 2016, 1:45:00 PM