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.
Note: Although called NamedNodeMap
, this interface doesn't deal with Node
objects but with Attr
objects, which are a specialized class of Node
objects.
Instance properties
This interface doesn't inherit any property.
NamedNodeMap.length
Read only
-
Returns the amount of objects in the map.
Instance methods
This interface doesn't inherit any method.
-
NamedNodeMap.getNamedItem()
-
Returns an 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 an 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
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 |
NamedNodeMap |
1 |
12 |
3422–341–22 |
5 |
≤12.1 |
1 |
4.4 |
18 |
3422–344–22 |
≤12.1 |
1 |
1.0 |
getNamedItem |
1 |
12 |
1 |
6 |
≤12.1 |
1 |
4.4 |
18 |
4 |
≤12.1 |
1 |
1.0 |
getNamedItemNS |
1 |
12 |
1 |
9 |
≤12.1 |
1 |
4.4 |
18 |
4 |
≤12.1 |
1 |
1.0 |
item |
1 |
12 |
1 |
5 |
≤12.1 |
1 |
4.4 |
18 |
4 |
≤12.1 |
1 |
1.0 |
length |
1 |
12 |
1 |
5 |
≤12.1 |
1 |
4.4 |
18 |
4 |
≤12.1 |
1 |
1.0 |
removeNamedItem |
1 |
12 |
1 |
6 |
≤12.1 |
1 |
4.4 |
18 |
4 |
≤12.1 |
1 |
1.0 |
removeNamedItemNS |
1 |
12 |
1 |
9 |
≤12.1 |
1 |
4.4 |
18 |
4 |
≤12.1 |
1 |
1.0 |
setNamedItem |
1 |
12 |
1 |
6 |
≤12.1 |
1 |
4.4 |
18 |
4 |
≤12.1 |
1 |
1.0 |
setNamedItemNS |
1 |
12 |
1 |
9 |
≤12.1 |
1 |
4.4 |
18 |
4 |
≤12.1 |
1 |
1.0 |
See also