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## XML DOM CharacterData.deleteData() Method The `deleteData()` method is a standard API of the XML DOM `CharacterData` interface (implemented by `Text`, `Comment`, and `CDATASection` nodes). It is used to delete a specified range of characters from a text node. --- ## Definition and Usage The `deleteData()` method removes a sequence of characters from the data of a text node, starting at a specified offset and spanning a specified length. Once this method is executed, the node's content is updated in place, and the DOM tree reflects the change immediately. --- ## Syntax ```javascript characterDataNode.deleteData(offset, count); ``` ### Parameters | Parameter | Type | Required / Optional | Description | | :--- | :--- | :--- | :--- | | `offset` | `Number` | **Required** | The zero-based index at which to start deleting characters. | | `count` | `Number` | **Required** | The number of characters to delete. | ### Return Value * This method does not return any value (`undefined`). ### Exceptions * **IndexSizeError**: Thrown if `offset` is negative or greater than the total number of characters in the node, or if `count` is negative. --- ## Code Example The following example loads an XML document, ["books.xml"](/try/demo_source/books.xml), into `xmlDoc` using `loadXMLDoc()`, and deletes a portion of the text from the first ` ``` ### JavaScript Implementation ```javascript // Load the XML document var xmlDoc = loadXMLDoc("books.xml"); // Access the text node of the first