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.

1<aura:handler name="destroy" value="{!this}" action="{!c.handleDestroy}" />

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

1({
2  handleDestroy: function (component, event, helper) {
3    var val = event.getParam("value");
4    // Do something else here
5  },
6});

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.