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When the drawer opens / close, the result of AppNavigator.router.getStateForAction(action, state); is null. So the nav state in the store is null which causes errors. This solves that.
React Navigation

Learn once, navigate anywhere.
Browse the docs on reactnavigation.org.
Motivation
React Navigation is born from the React Native community's need for an extensible yet easy-to-use navigation solution. It replaces and improves upon several navigation libraries in the ecosystem, including Ex-Navigation, React Native's Navigator and NavigationExperimental components. React Navigation can also be used across React and React Native projects allowing for a higher degree of shared code.
Once stable, NavigationExperimental will be depracated in favor of React Navigation. React Navigation is a collaboration between people from Facebook, Exponent and the React community at large.
Getting started
- Create a new React Native App
react-native init SimpleApp
cd SimpleApp
- Install the latest version of react-navigation from npm
yarn add react-navigation
or
npm install --save react-navigation
- Run the new app
react-native run-android # or:
react-native run-ios
Advanced guide
React Navigation API
Description
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