React Navigation check if previous screen exists

Question

I am looking desperately for a possibility to check if a previous screen exists in ReactNavigation.

Using this.props.navigation.goBack() returns

Answer 1

It's completely working for me.... If you want to find out previous route/screen name from navigation stack in react native app so you can use this function.

export const previousRouteName = (navigation) =>{
  let navRoutes = navigation.dangerouslyGetParent().state.routes;
  if (navRoutes.length >= 2){
    return navRoutes[navRoutes.length - 2].routeName
  }
  return navigation.state.routeName
}

How to use?

previousRouteName(props.navigation);

Hope you like and helpful to you K00L ;)