import { StackNavigator,NavigationActions } from 'react-navigation';
 
const App = StackNavigator({
    Home: { screen: HomeScreen },Details: { screen: DetailsScreen },});
 
// Prevents double taps navigating twice
const navigateOnce = (getStateForAction) => (action,state) => {
    const { type,routeName } = action;
    return (
        state &&
        type === NavigationActions.NAVIGATE &&
        routeName === state.routes[state.routes.length - 1].routeName
    ) ? state : getStateForAction(action,state);
};
App.router.getStateForAction = navigateOnce(App.router.getStateForAction);