MessageTriggerType

MessageTriggerType = "on_mount" | "on_event" | "on_interval"

Trigger type that controls when the message placement evaluates and renders.

• 'on_mount' — Evaluate immediately when the component mounts.
• 'on_event' — Evaluate when triggerEvent is called externally.
• 'on_interval' — Re-evaluate on a polling interval.