Value Destroy

This event is fired when a component is destroyed. Handle this event if you need to do custom cleanup when a component is destroyed.

This client-side controller handles the aura:valueDestroy event.

Let’s say that you are viewing a component in the Salesforce app. The aura:valueDestroy event is triggered when you tap on a different menu item on the Salesforce mobile navigation menu, and your component is destroyed. In this example, the value parameter in the event returns the component that’s being destroyed.