SAP Spartacus is the store front page of SAP Commerce Cloud, developed based on Angular. Among them, Spinner is a Share control. When Spartacus UI initiates a data request to the background, the interface will display a circular rotation effect, lock the UI, prevent the user from further operations, and prompt the user that the UI currently to be displayed has data from the background server load. Similar to the petal animation effect displayed when data is loaded in the SAP Fiori application.
For step-by-step debugging steps at runtime, you can refer to this video .