Im interested in firing a function when a user quits the app, meaning they bring up multi-tasking and close-out the app.
I'm not talking about navigating back to your home screen and keeping the app in the background.
I'm aware of AppState, but as I said, im looking for the suit scenario, not a change from active, to the background
Is this possible, my componentWillUnmount() is not firing in this case?
Here is an example using an OS background task and additional library. That might be your best bet without using AppState/ComponentDidUnmount() which would only detect active/background status:
https://github.com/billmalarky/react-native-queue#os-background-task-full-example
componentWillUnmount() won't fire because that's only when a component is being removed from the DOM.
The JavaScript engine closes when the app does so there's no other way to communicate with it once the app is closed.
