Internal
Manages the activation and deactivation of theme style elements.
The service observes the document head and registers style elements containing theme annotations.
Themes are identified by a data-theme attribute on their style elements.
Creates the service, scans existing styles and observes subsequently inserted styles.
Activates all style elements belonging to the provided theme and deactivates all other theme style elements.
The theme ID to activate.
A theme may consist of one or more style elements.
Manages the activation and deactivation of theme style elements.
The service observes the document head and registers style elements containing theme annotations.
Themes are identified by a data-theme attribute on their style elements.