There are two distinct lifespan scenarios for Web Dynpro components:
● Lifespan of the application’s root component
The component chosen to act as the application’s entry point is known as the root component. When a user invokes the associated URL, the Web Dynpro framework creates an instance of the application’s root component.
This component instance will persist until such time as the user formally terminates the application, or closes their client (e.g. the browser), enters a new URL, or remains inactive for the configured time out period.
More information: Applications
● Lifespan of a child component
Any Web Dynpro component may act as the child of any other Web Dynpro component. In such cases, the lifespan of the child component may either be controlled automatically by the Web Dynpro framework, or it may be controlled by coding written by the application developer in the parent component.