Wis. Stat. § 768.02: Purpose.

No act hereafter done within this state shall operate to give rise, either within or without this state, to any of the causes of action abolished by this chapter. No contract to marry, which shall hereafter be made in this state, shall operate to give rise, either within or without this state, to any cause of action for breach thereof, and any such acts and contracts are hereby rendered ineffective to support or give rise to any such causes of action, within or without this state.