previously when opening a deeplink without a path, it would result in an array of 2 empty strings, which is are falsy values, so the full url was passed on.
by checking if the value is actually `undefined` instead of falsy we have no more false positives
* Navigation actions should be string literals to work properly with Flow
* Update StackRouter/TabRouter tests with eslint ignore rule
* Use `expect.objectContaining` so we don't rely on keys
This Init{index} pattern guarantees that the same keys will always be re-used when doing a RESET.
This behaviour doesn’t match how the rest of the router works and causes bugs.
Namely if you are on `{ routeName: ‘Dashboard’, params: { user: ‘A’ } }` and use RESET to `{ routeName: ‘Dashboard’, params: { user: ‘B’ } }` when the user switches, it will act like a `setParams` action instead of a `RESET` action and the Dashboard will not be re-mounted.
to allow composition of the Header component when using a custom header
component, styling is probably one of the options you want to have.
For example, I need to dynamicly change the height of the header based
on scroll position, and without this change I have to inherit from the
Header component and copy the render function, instead of composing the
Header component in my own component.
* add headerBackTitleStyle screen option
since the title is customizable, the back title should too.
* add documentation for `headerBackTitleStyle`
* make absence of headerBackTitle not affect return value
* merge styles so current scene can override
If there's no last scene, return the `headerBackTitleStyle` from the
current scene.
Otherwise return the `headerTitleStyle` from the last scene, and the
`headerBackTitleStyle` from the current scene, with the latter having
precedence.
* take headerBackTitleStyle from current scene
also the title style of the last scene is no longer taken into account
* Implement getPathAndParamsForState for StackRouter
* Add test to make sure `params` is correct in getPathAndParamsForState of StackRouter
* chore: fix flow
* Fix Modal Gestures
* Update StackNavigator.md for gesturesEnabled to include modals again
* Remove modal gesture todo
* Gesture response distance top, side => vertical, horizontal
* Force the back button to be recognized as such by screen readers.
* Update HeaderBackButton.js
* Update HeaderBackButton.js
* Update HeaderBackButton.js
* Format remaining issues
