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

As of React Navigation 5 you can use useNavigationState hook inside functional component this way:

const routesLength = useNavigationState(state => state.routes.length);
console.log('routesLength', routesLength);

If routesLength > 1 then it is not the first screen in stack

Or you can use navigation.canGoBack()