Have tapping on a Tab button take you to the initial scene

[jbkuczma]

In other apps when you tap on a tab button it will perform a function (ex: Instagram: search for a user, click their profile, click search tab button takes you back to the initial search screen).

When you click the tab button while in a nested scene for that tab, you should go back to the root scene (ex: Scores screen -> game -> boxscore -> tap scores tab button -> back to Scores screen).

Something along the lines of the following would go in navigationOptions({...}) of the tab navigator:

tabBarOnPress: (scene, jumpToIndex) => { console.log('onPress:', scene) }

source: https://reactnavigation.org/docs/tab-navigator.html#tabbaronpress

[jbkuczma]

The following works as intended BUT there is a bug

tabBarOnPress: ({ scene, jumpToIndex }) => {
  console.log('onPress:', scene);
  if (scene.route.index !== 0) {
    navigation.popToTop()
  } else {
    jumpToIndex(scene.index)
  }
}

BUG: standings -> team -> games -> game -> scores tab -> game -> tap scores tab and then standings (can't view standings tab)

[jbkuczma]

side effect noted in comment:

• standings tab -> team -> team games -> select a game [1] -> scores tab -> select new game [2] -> standings tab
• should be back at the game selected as [1]
• game [1] team colors are now the team colors from game [2]

placing this issue on hold and creating a new issue for the problem described above