Client-side scripts manage what?

While client-side scripts directly control the appearance and behavior of forms and fields, the question asks what they 'manage' in a broader sense, implying interactions that ultimately affect the backend and database.

Playbook access is typically controlled by server-side roles and permissions, not client-side scripts.

Client-side scripts interact with the database and backend by initiating requests (e.g., through GlideAjax or form submissions) which trigger server-side operations that manage data persistence and business logic.

User access management (authentication, authorization) is fundamentally a server-side responsibility, enforced by access control lists and user roles.