Groovy Script to Return an Error Message if User Leaves Page Before Finishing Run

Summary:

I am currently working with a Groovy script in Oracle Sales/CRM Cloud. The requirement is to either warn or return an error message if a user navigates away from the page before the script finishes execution.

Could you please confirm:

Is it possible for a Groovy script to detect when a user leaves the page before completion?

If not, what is the recommended approach to handle long-running scripts and ensure users are informed not to leave the page?

Any guidance or best practices would be greatly appreciated.

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