ReadonlylengthThe read-only length property of the NamedNodeMap interface is the number of objects stored in the map.
The getNamedItem() method of the NamedNodeMap interface returns the Attr corresponding to the given name, or null if there is no corresponding attribute.
The getNamedItemNS() method of the NamedNodeMap interface returns the Attr corresponding to the given local name in the given namespace, or null if there is no corresponding attribute.
The item() method of the NamedNodeMap interface returns the item in the map matching the index.
The removeNamedItem() method of the NamedNodeMap interface removes the Attr corresponding to the given name from the map.
The removeNamedItemNS() method of the NamedNodeMap interface removes the Attr corresponding to the given namespace and local name from the map.
The
NamedNodeMapinterface 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.MDN Reference