📅  最后修改于: 2020-11-10 05:11:25             🧑  作者: Mango
节点接口是整个文档对象模型的主要数据类型。该节点用于表示整个文档树中的单个XML元素。
节点可以是属性节点,文本节点或任何其他节点的任何类型。包含属性nodeName,nodeValue和属性作为获取节点信息的机制,而无需强制转换为特定的派生接口。
下表列出了Node对象的属性-
Attribute | Type | Description |
---|---|---|
attributes | NamedNodeMap | This is of type NamedNodeMap containing the attributes of this node (if it is an Element) or null otherwise. This has been removed. Refer specs |
baseURI | DOMString | It is used to specify absolute base URI of the node. |
childNodes | NodeList | It is a NodeList that contains all children of this node. If there are no children, this is a NodeList containing no nodes. |
firstChild | Node | It specifies the first child of a node. |
lastChild | Node | It specifies the last child of a node. |
localName | DOMString | It is used to specify the name of the local part of a node. This has been removed. Refer specs. |
namespaceURI | DOMString | It specifies the namespace URI of a node. This has been removed. Refer specs |
nextSibling | Node | It returns the node immediately following this node. If there is no such node, this returns null. |
nodeName | DOMString | The name of this node, depending on its type. |
nodeType | unsigned short | It is a code representing the type of the underlying object. |
nodeValue | DOMString | It is used to specify the value of a node depending on their types. |
ownerDocument | Document | It specifies the Document object associated with the node. |
parentNode | Node | This property specifies the parent node of a node. |
prefix | DOMString | This property returns the namespace prefix of a node. This has been removed. Refer specs |
previousSibling | Node | This specifies the node immediately preceding the current node. |
textContent | DOMString | This specifies the textual content of a node. |
我们列出了以下节点类型-
下表列出了不同的Node Object方法-
S.No. | Method & Description |
---|---|
1 | appendChild(Node newChild)
This method adds a node after the last child node of the specified element node. It returns the added node. |
2 | cloneNode(boolean deep)
This method is used to create a duplicate node, when overridden in a derived class. It returns the duplicated node. |
3 | compareDocumentPosition(Node other)
This method is used to compare the position of the current node against a specified node according to the document order. Returns unsigned short, how the node is positioned relatively to the reference node. |
4 |
getFeature(DOMString feature, DOMString version) Returns the DOM Object which implements the specialized APIs of the specified feature and version, if any, or null if there is no object. This has been removed. Refer specs. |
5 |
getUserData(DOMString key) Retrieves the object associated to a key on this node. The object must first have been set to this node by calling the setUserData with the same key. Returns the DOMUserData associated to the given key on this node, or null if there was none. This has been removed. Refer specs. |
6 |
hasAttributes() Returns whether this node (if it is an element) has any attributes or not. Returns true if any attribute is present in the specified node else returns false. This has been removed. Refer specs. |
7 | hasChildNodes()
Returns whether this node has any children. This method returns true if the current node has child nodes otherwise false. |
8 | insertBefore(Node newChild, Node refChild)
This method is used to insert a new node as a child of this node, directly before an existing child of this node. It returns the node being inserted. |
9 | isDefaultNamespace(DOMString namespaceURI)
This method accepts a namespace URI as an argument and returns a Boolean with a value of true if the namespace is the default namespace on the given node or false if not. |
10 | isEqualNode(Node arg)
This method tests whether two nodes are equal. Returns true if the nodes are equal, false otherwise. |
11 |
isSameNode(Node other) This method returns whether current node is the same node as the given one. Returns true if the nodes are the same, false otherwise. This has been removed. Refer specs. |
12 |
isSupported(DOMString feature, DOMString version) This method returns whether the specified DOM module is supported by the current node. Returns true if the specified feature is supported on this node, false otherwise. This has been removed. Refer specs. |
13 | lookupNamespaceURI(DOMString prefix)
This method gets the URI of the namespace associated with the namespace prefix. |
14 | lookupPrefix(DOMString namespaceURI)
This method returns the closest prefix defined in the current namespace for the namespace URI. Returns an associated namespace prefix if found or null if none is found. |
15 | normalize()
Normalization adds all the text nodes including attribute nodes which define a normal form where structure of the nodes which contain elements, comments, processing instructions, CDATA sections, and entity references separates the text nodes, i.e, neither adjacent Text nodes nor empty Text nodes. |
16 | removeChild(Node oldChild)
This method is used to remove a specified child node from the current node. This returns the node removed. |
17 | replaceChild(Node newChild, Node oldChild)
This method is used to replace the old child node with a new node. This returns the node replaced. |
18 |
setUserData(DOMString key, DOMUserData data, UserDataHandler handler) This method associates an object to a key on this node. The object can later be retrieved from this node by calling getUserData with the same key. This returns the DOMUserData previously associated to the given key on this node. This has been removed. Refer specs. |