Adds a child element to this component.
The child component or text string to add
This component (for chaining)
Prepares this component and its children for XML serialization.
This method is called by the Formatter to convert the component tree into an object structure compatible with the xml library (https://www.npmjs.com/package/xml). It recursively processes all children and handles special cases like attribute-only elements and empty elements.
The method can be overridden by subclasses to customize XML representation or execute side effects during serialization (e.g., creating relationships).
The serialization context containing document state
The XML-serializable object, or undefined to exclude from output
Represents a document background in a WordprocessingML document.
The background element specifies the background color or theme color for the document.
Reference: http://officeopenxml.com/WPdocument.php
XSD Schema
Example