NamedNodeMap

{{APIRef("DOM")}}

The NamedNodeMap interface represents a collection of {{domxref("Attr")}} objects. Objects inside a NamedNodeMap are not in any particular order, unlike {{domxref("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 {{domxref("Node")}} objects but with {{domxref("Attr")}} objects, which are a specialized class of {{domxref("Node")}} objects.

Instance properties

This interface doesn't inherit any property.

• {{domxref("NamedNodeMap.length")}} {{ReadOnlyInline}}
  • : Returns the amount of objects in the map.

Instance methods

This interface doesn't inherit any method.

• {{domxref("NamedNodeMap.getNamedItem()")}}
  • : Returns an {{domxref("Attr")}}, corresponding to the given name.
• {{domxref("NamedNodeMap.setNamedItem()")}}
  • : Replaces, or adds, the {{domxref("Attr")}} identified in the map by the given name.
• {{domxref("NamedNodeMap.removeNamedItem()")}}
  • : Removes the {{domxref("Attr")}} identified by the given map.
• {{domxref("NamedNodeMap.item()")}}
  • : Returns the {{domxref("Attr")}} at the given index, or null if the index is higher or equal to the number of nodes.
• {{domxref("NamedNodeMap.getNamedItemNS()")}}
  • : Returns an {{domxref("Attr")}} identified by a namespace and related local name.
• {{domxref("NamedNodeMap.setNamedItemNS()")}}
  • : Replaces, or adds, the {{domxref("Attr")}} identified in the map by the given namespace and related local name.
• {{domxref("NamedNodeMap.removeNamedItemNS()")}}
  • : Removes the {{domxref("Attr")}} identified by the given namespace and related local name.

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• {{domxref("Element.attributes")}}