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On Selection

Last updated 30/03/2026

Overview​

The On Selection event is a client-side event that executes when a user selects a menu item that references a process or mail merge. This event executes immediately upon selection, before any server-side processing or rendering occurs. It allows the application to respond instantly to the user's action at the UI level.

How it Works​

When a process or mail merge menu item is selected:

  1. The On Selection event executes on the client.
  2. No page rendering or server communication has occurred yet.
  3. It can be used to prepare, validate, or control what happens next.

Use Cases​

  • Check if required data is available before continuing with the process or mail merge
  • Display a message or confirmation prompt before proceeding
  • Decide whether to allow the process or mail merge to continue
  • Set temporary values, flags, or states in the interface