wrapperMessagingWithoutDetection.js runs. Be advised that you may run into issues if your organization has a content security policy not allowing reverse injection.
From the builder for a privacy manager, first layer message, or custom message, a custom JS action can be added by:
Select the button component in the builder and navigate to the Settings panel on the left-hand rail. Expand the Action accordion.
Click Save Message when finished.
Click Save message.