React Navigation 6: Override parent navigator's header configuration from an screen inside child navigator

Question

I have a BottomTab navigator nested inside an Stsck navigator. And the header is configured via Stack screenOptions:

function AppStackNavigator() {
  return (
      <Stack.Navigator screenOptions={getScreenOptions}>
        <Stack.Screen name="BottomTab" component={BottomTabNavigator}/>
        ...
      </Stack.Navigator>
  )

  const getScreenOptions = ({route, navigation}) => {
    // crazy logic ... 
    return {
      headerLeft: getHeaderLeft,
      headerRight: getHeaderRight,
      ...
    }
  }

}

And in the BottomTaB navigator I have an screen called Target. Notice that the headerShown is set to false here.

function BottomTabNavigators() {
  return (
      <Tab.Navigator
          screenOptions={{headerShown: false}}
          tabBar={props => <MyTabBar {...props}/>}
      >
        <Tab.Screen name="Target" component={TargetScreen}/>
      </Tab.Navigator>
  )
}

In target screen I am overriding the headerRight of the PARENT navigator, because I need direct interaction between header and a method (methodThatIsOnlyAccessableHere) which is only accessible inside this screen:

function TargetScreen() {

  const  methodThatIsOnlyAccessableHere = () => { ... }

  useLayoutEffect(() => {
    const getHeaderRight = () => {
    // call methodThatIsOnlyAccessableHere
    ...
    }

    const parentNavigator = navigation.getParent()
    parentNavigator.setOptions({
      headerRight: getHeaderRight,
    })

  }, [navigation])
}

Current behaviour:

The top level header configuration (screenOptions in Stack navigator) is working perfectly. When navigating to Target screen, the overrided header configuration (using setOptions ) will become active. However, when leaving this screen, this overrided configuration still remains active (Undesired behaviour)

Desired behaviour

When leaving Target screen, the top level header configuration should become active and the overrided configuration should become effectless.

Why is this my design choice ?

I am always hiding the nested navigator header (the header of the BottomTab navigator) and configuring the top level (parent) navigator header (Stack navigator) based on the state of the child navigator. I cannot move the header configuration of Target screen to the parent because in this case I will not have access to methodThatIsOnlyAccessableHere.

Answer 1

You would need to update headerRight again. For instance: use the cleanup of your useLayoutEffect hook.

  useLayoutEffect(() => {
    const getHeaderRight = () => {
    // call methodThatIsOnlyAccessableHere
    ...
    }

    const parentNavigator = navigation.getParent()
    parentNavigator.setOptions({
      headerRight: getHeaderRight,
    })

    // cleanup
    return () => {
      parentNavigator.setOptions({
        headerRight: null
      })
    }

  }, [navigation])

Answer 2

I'm assuming your TargetScreen function runs for each route call, to override the parent element whenever possible. If true, you could reset the options at the start of your useLayoutEffect hook, and, again assuming your getParent() call checks for which kind of page youre accessing, it would reset the current page navigation whenever the effect gets called whithout affecting its overriding call.