XML DOM - Het knooppuntobject
Het knooppuntobject
Het Node-object vertegenwoordigt een enkel knooppunt in de documentstructuur.
Een knooppunt kan een elementknooppunt, een attribuutknooppunt, een tekstknooppunt of elk ander knooppunttype zijn dat wordt uitgelegd in het hoofdstuk Knooppunttypen .
Merk op dat hoewel alle objecten de Node-eigenschappen / -methoden voor het omgaan met ouders en kinderen erven, niet alle objecten ouders of kinderen kunnen hebben. Tekstknooppunten hebben bijvoorbeeld mogelijk geen onderliggende knooppunten en het toevoegen van onderliggende knooppunten aan dergelijke knooppunten resulteert in een DOM-fout.
Eigenschappen knooppuntobject
| Property | Description |
|---|---|
| attributes | A NamedNodeMap containing the attributes of this node (if it is an Element) |
| baseURI | Returns the absolute base URI of a node |
| childNodes | Returns a NodeList of child nodes for a node |
| firstChild | Returns the first child of a node |
| lastChild | Returns the last child of a node |
| nextSibling | Returns the node immediately following a node |
| nodeName | Returns the name of a node, depending on its type |
| nodeType | Returns the type of a node |
| nodeValue | Sets or returns the value of a node, depending on its type |
| ownerDocument | Returns the root element (document object) for a node |
| parentNode | Returns the parent node of a node |
| prefix | Sets or returns the namespace prefix of a node |
| previousSibling | Returns the node immediately before a node |
| textContent | Sets or returns the textual content of a node and its descendants |
Knooppuntobjectmethoden
| Method | Description |
|---|---|
| appendChild() | Appends a new child node to the end of the list of children of a node |
| cloneNode() | Clones a node |
| compareDocumentPosition() | Compares the placement of two nodes in the DOM hierarchy (document) |
| getFeature(feature,version) | Returns a DOM object which implements the specialized APIs of the specified feature and version |
| getUserData(key) | Returns the object associated to a key on a this node. The object must first have been set to this node by calling setUserData with the same key |
| hasAttributes() | Returns true if the specified node has any attributes, otherwise false |
| hasChildNodes() | Returns true if the specified node has any child nodes, otherwise false |
| insertBefore() | Inserts a new child node before an existing child node |
| isDefaultNamespace(URI) | Returns whether the specified namespaceURI is the default |
| isEqualNode() | Tests whether two nodes are equal |
| isSameNode() | Tests whether the two nodes are the same node |
| lookupNamespaceURI() | Returns the namespace URI associated with a given prefix |
| lookupPrefix() | Returns the prefix associated with a given namespace URI |
| normalize() | Puts all Text nodes underneath a node (including attribute nodes) into a "normal" form where only structure (e.g., elements, comments, processing instructions, CDATA sections, and entity references) separates Text nodes, i.e., there are neither adjacent Text nodes nor empty Text nodes |
| removeChild() | Removes a specified child node from the current node |
| replaceChild() | Replaces a child node with a new node |
| setUserData(key,data,handler) | Associates an object to a key on a node |