How to implement Split View on a tablet with React Native

Tried to implement a Split View I found out the next:

1) wix/react-native-navigation has support Split View on iOS only.
2) react-navigation has only feature request for Tablet dual pane support

Is it possible with little effort to get the desired result?

Yes is it! You can check:

• split view demo app
• open an Expo snack https://snack.expo.io/split-view

Someone recommends using an adaptable layout, but if we need to have an ability to "push" screens components into a separate area and support a back gesture (iOS) and a system back (Android)

Let me demonstrate the result before I explain how it works:

phone	tablet

As you see above when split view enabled some screens opened in left or right areas. It is possible due to two container navigator.

// Main navigator
<NavigationContainer>
  <SplitView>
    <LeftStack />

    // Additional navigator
    {isTablet ? <NavigationContainer
      independent={true}
      /* 
          `independent={true}` Ignore exception when containers are nested within another
          See: https://github.com/react-navigation/react-navigation/commit/d4072e7d885222bc14f33734008f2bd10ff78bc4
      */
    >
      <RightStack />
    </NavigationContainer> : null}
  </SplitView>
</NavigationContainer>

And to push a screen to an additional navigator we need to check it is mounted:

const pushChatSettingsScreen = ({userId}) => {
  const args = [CHAT_SETTINGS_SCREEN, {userId}];

  if (isDetailsNavigatorMounted()) {
    return detailsPush(...args);
  }

  return push(...args);
};

src: MessageScreen/navigation.js

To understand how push \ isDetailsNavigatorMounted works please check source code of Navigator

Support system back on Android

When you try to return to a previous screen using a "system back" on Android you will be faced with the next error:

The action 'GO_BACK' was not handled by any navigator.

Is there any screen to go back to?

It happens because each NavigationContainer subscribe on hardwareBackPress of BackHandler. And let see note about listeners invoking:

The event subscriptions are called in reverse order (i.e. the last registered subscription is called first).

So we have two <NavigationContainer/> that subscribed BackHandler and when a user press a back button only the last control all "go hack" behavior

To fix it created a specific HOC withSystemBackFix that implement the desired behavior. I wrapped all screens that would be open in split view

As a result, all screens will be closed in order how they were opened:

So use an example app to understand all aspects of my implementation of Split View
if you have any question I am glad to discuss them in the comments!

(c) MurAmur