📅 最后修改于: 2020-11-10 05:11:55 🧑 作者: Mango
NamedNodeMap对象用于表示可以通过名称访问的节点的集合。
下表列出了NamedNodeMap对象的属性。
| Attribute | Type | Description |
|---|---|---|
| length | unsigned long | It gives the number of nodes in this map. The range of valid child node indices is 0 to length-1 inclusive. |
下表列出了NamedNodeMap对象的方法。
| S.No. | Methods & Description |
|---|---|
| 1 | getNamedItem ()
Retrieves the node specified by name. |
| 2 | getNamedItemNS ()
Retrieves a node specified by local name and namespace URI. |
| 3 | item ()
Returns the indexth item in the map. If index is greater than or equal to the number of nodes in this map, this returns null. |
| 4 | removeNamedItem ()
Removes a node specified by name. |
| 5 | removeNamedItemNS ()
Removes a node specified by local name and namespace URI. |
| 6 | setNamedItem ()
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. |
| 7 | setNamedItemNS ()
Adds a node using its namespaceURI and localName. If a node with that namespace URI and that local name is already present in this map, it is replaced by the new one. Replacing a node by itself has no effect. |