Summary

When a form is submitted, a formSubmission event is pushed to dataLayer. Some NROs have web analytics setups that differ from the global one and need additional parameters to be sent with the event.

Adding a filter hook for the event data would solve this.

Objectives of task:

• Generally: Enable NROs to modify the data that's sent with a formSubmission event.
• Specific use case: Enable GP Switzerland to add newletter subscription data and and gp_user_id to the formSubmission event.