React Native: How do you handle React Native app backgrounding?

1import { AppState } from "react-native";
2
3function useAppState(onForeground, onBackground) {
4  useEffect(() => {
5    const sub = AppState.addEventListener("change", (state) => {
6      if (state === "active") onForeground();
7      if (state === "background") onBackground();
8    });
9    return () => sub.remove();
10  }, []);
11}