YouTip

## XML DOM parentNode Property The `parentNode` property returns the parent node of the specified element or node in the DOM (Document Object Model) tree. In XML and HTML documents, nodes are structured in a hierarchical tree. Every node (except the root node) has exactly one parent node. This property is highly useful for traversing upward through the DOM tree. --- ## Syntax and Usage ### Syntax ```javascript node.parentNode ``` ### Return Value * **Node Object**: Returns the parent node of the current node. * **null**: Returns `null` if the node has no parent (for example, if it is the `document` node itself or a newly created node that has not yet been inserted into the tree). --- ## Code Examples ### Example 1: Retrieving the Parent Node in XML The following code snippet loads an XML document ([books.xml](/try/demo_source/books.xml)) using `loadXMLDoc()` and retrieves the parent node of the first `