For situations where emitting an event to the parent component doesn’t make sense, Statamic has a global event bus. You can emit and listen to events directly on this which will be available to all Vue components.
// Emit from some component...this.$events.$emit('event.name');// Listen for it in another component...this.$events.$on('event.name');
The event bus is intended to be used for Vue component communication. If you want to listen for Statamic driven “events”, check out Hooks.