React Navigation (v1/2/3/4) Navigator wrapped in a React Context Provider

ReactNavigation4+Context.js

// So we have a context...

const Context = React.createContext();

class Provider extends React.Component {
  addTodo = todo => this.setState(({ todos }) => ({ todos: [...todos, todo] }));
  
  state = {
    todos: [],
    addTodo: this.addTodo
  };
  
  render() {
    return (
      <Context.Provider value={this.state}>
        {this.props.children}
      </Context.Provider>
  }
}

const Consumer = Context.Consumer;

// ... and we have a stack navigator

const Todos = ({ navigation }) => (
  <Consumer>
    {({ todos }) => (<TodosList todos={todos} onAddTodo={navigation.push('AddTodo')} />)}
  </Consumer>
);

const AddTodo = ({ navigation }) => (
  <Consumer>
    {({ addTodo }) => (<CreateTodo onCreateTodo={todo => {
                                                   addTodo(todo);
                                                   navigation.pop();
                                                 }}
                       />)}
  </Consumer>
);

const Stack = createStackNavigator({ Todos, AddTodo });

// you can wrap the stack with the provider...

const StackWithTodos = props => (
  <Provider>
    <Stack {...props} /> // Important: pass down navigation and screenProps from parent for nested navigators.
  </Provider>
);

StackWithTodos.router = Stack.router; // Also important: static router must be the same as well.

// ... and use it wherever you want, without creating a new app container.

const TabNavigator = createBottomTabNavigator({
  TabA: StackWithTodos,
  TabB: ...,
});

Silly question how can I console.log data inside one of the views? Any ideas on what I'm doing wrong here? With the code below I am trying to console.log(this.context) and get blank object {}

const BookContext = React.createContext();

class BookProvider extends Component {

    state = {
        name: 'BATMAN'
    }

    render() {
        return (
            <BookContext.Provider
                value={{
                    ...this.state,
                    name: this.state.name
                }}>

                {this.props.children}
            </BookContext.Provider>
        )
    }

}

const Consumer = BookContext.Consumer;


//root stack
const RootStack = createStackNavigator({
    MainStack: MainStack,
    AddBookStack: AddBookStack,
    EditPhotosStack: EditPhotosStack,
    CameraStack: CameraStack,
    AllGuidesStack: AllGuidesStack, //required to open guides from books view - dnd
}, {
    mode: 'modal',
    headerMode: 'none',
}, { headerLayoutPreset: 'center' });


const RootStackWithContext = props => (
    <BookProvider>
        <RootStack {...props} />
    </BookProvider>
);

RootStackWithContext.router = RootStack.router;

//------------------------------ drawer -------------------------------//

const DrawerStack = createDrawerNavigator({
    RootStack: RootStackWithContext,
    RootGuidesStack: RootGuidesStack,
}, {
    drawerPosition: 'left',
    drawerType: 'front',
    overlayColor: global.colorPurpleAlpha,
    contentComponent: DrawerMenu,
});

Hi, @barrylachapelle. I can't see any console.log statement in your code.

thanks a lot!