NamedNodeMap - Web APIs 编辑
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, ornull
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. | Obsolete | 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. | Obsolete | Added getNamedItemNS() , setNamedItemNS() and removeNamedItemNS() |
Document Object Model (DOM) Level 1 Specification The definition of 'NamedNodeMap' in that specification. | Obsolete | Initial definition |
Browser compatibility
BCD tables only load in the browser
See also
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