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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.lengthRead 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
Attridentified in the map by the given name. NamedNodeMap.removeNamedItem()- Removes the
Attridentified by the given map. NamedNodeMap.item()- Returns the
Attrat the given index, ornullif the index is higher or equal to the number of nodes. NamedNodeMap.getNamedItemNS()- Returns a
Attridentified by a namespace and related local name. NamedNodeMap.setNamedItemNS()- Replaces, or adds, the
Attridentified in the map by the given namespace and related local name. NamedNodeMap.removeNamedItemNS()- Removes the
Attridentified 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 |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
Deals with Attr rather than Node |
? | 22 (22)[1] | ? | ? | ? |
| Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
| Basic support | (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.