Adds a node using its nodeName attribute. If a node with
that name is already present in this map, it is replaced by the new
one. Replacing a node by itself has no effect.
As the nodeName attribute is used to derive the name
which the node must be stored under, multiple nodes of certain types
(those that have a "special" string value) cannot be stored as the
names would clash. This is seen as preferable to allowing nodes to be
aliased.
arg | A node to store in this map. The node will later be
accessible using the value of its nodeName attribute. |
Node replaces an existing node the
replaced Node is returned, otherwise null
is returned.
DOMException
| WRONG_DOCUMENT_ERR: Raised if arg was created from a
different document than the one that created this map.
NO_MODIFICATION_ALLOWED_ERR: Raised if this map is readonly. INUSE_ATTRIBUTE_ERR: Raised if arg is an
Attr that is already an attribute of another
Element object. The DOM user must explicitly clone
Attr nodes to re-use them in other elements.
HIERARCHY_REQUEST_ERR: Raised if an attempt is made to add a node doesn't belong in this NamedNodeMap. Examples would include trying to insert something other than an Attr node into an Element's map of attributes, or a non-Entity node into the DocumentType's map of Entities. |
Diagram: Node Support