Summary:
iOS 13 added a new property to `UIScrollView`: `automaticallyAdjustsScrollIndicatorInsets`, which is `YES` by default. The property changes the meaning of the `scrollIndicatorInsets` property. When `YES`, any such insets are **in addition to** whatever insets would be applied by the device's safe area. When `NO`, the iOS <13 behavior is restored, which is for such insets to not account for safe area.
In other words, this effects ScrollViews that underlay the device's safe area (i.e. under the notch). When `YES`, the OS "automatically" insets the scroll indicators, when `NO` it does not.
There are two problems with the default `YES` setting:
1. It means applying `scrollIndicatorInsets` to a `ScrollView` has a different effect on iOS 13 versus iOS 12.
2. It limits developers' control over `scrollIndicatorInsets`. Since negative insets are not supported, if the insets the OS chooses are too large for your app, you cannot fix it.
Further explanation & sample code is available in issue https://github.com/facebook/react-native/issues/28140 .
This change sets the default for this property to `NO`, making the behavior consistent across iOS versions, and allowing developers full control.
## Changelog
<!-- Help reviewers and the release process by writing your own changelog entry. For an example, see:
https://github.com/facebook/react-native/wiki/Changelog
-->
[iOS] [Changed] - ScrollView scrollIndicatorInsets to not automatically add safe area on iOS13+
Pull Request resolved: https://github.com/facebook/react-native/pull/29809
Test Plan:
Updated the RNTester example to explain what to expect. Also removed the `pageScreen` modal example for now as mentioned in my Github comment.
{F628636466}
Here are screenshots of the demo app (from the original bug) before (with safe area applied to insets) & after (without safe area applied to insets):


Reviewed By: p-sun
Differential Revision: D28229603
Pulled By: lunaleaps
fbshipit-source-id: 2e774ae150b1dc41680b8b7886c7ceac8808136a
Summary:
Changelog:
[General][Changed] Convert require statements to use import from in Libraries/Components
Reviewed By: lunaleaps
Differential Revision: D27921557
fbshipit-source-id: 3f1618455a47a56c4a090f3ececfef88476c0b8a
Summary:
ES Modules implicitly enable strict mode. Adding the "use strict" directive is, therefore, not required.
This diff removes all "use strict" directives from ES modules.
Changelog:
[Internal]
Reviewed By: motiz88
Differential Revision: D26172715
fbshipit-source-id: 57957bcbb672c4c3e62b1db633cf425c1c9d6430
Summary:
There may be assumptions that `Native*.js` contains TurboModule. In order to avoid introducing unplanned breaking changes (especially right before the holidays), roll this back for now.
In doing so, I also realized that I forgot to migrate over `ScrollContentViewNativeComponent`. This does that, too.
Changelog:
[Internal]
Reviewed By: RSNara
Differential Revision: D25129324
fbshipit-source-id: 343c4b800969dab91f7cd9f2bf253788c94d38e6
Summary:
Migrates `ScrollView` (and its related native components) to use `NativeComponentRegistry`. This will enable it to be configured using experiments to conditionally use the native `ViewConfig` or verify the static `ViewConfig`.
This also cleans up a bunch of the modules and types related to defining the native `ScrollView` component.
This also proposes adopting the same module naming protocol was has been adopted for TurboModules (i.e. `NativeScrollView` instead of `ScrollViewNativeComponent`).
Changelog:
[Internal]
Reviewed By: JoshuaGross
Differential Revision: D25098530
fbshipit-source-id: ff1394bfac023daf58e85d5f9068e4f8da3538be
Summary:
Migrate ScrollView component to use ES6 import
motivation: trying to slowly migrate each files to use es6 import/exports to make this discussion happen
https://github.com/react-native-community/discussions-and-proposals/issues/201#issuecomment-588454552
## Changelog
[General] [Changed] - Use es6 import/export syntax for ScrollView component
Pull Request resolved: https://github.com/facebook/react-native/pull/29184
Test Plan:
Test on RNTester for iOS
currently having trouble starting up RNTester on Android, but will update when I'm able to check on Android
Reviewed By: TheSavior
Differential Revision: D22959782
Pulled By: PeteTheHeat
fbshipit-source-id: c909bddda3b5b2edd26a526eedaa67fadd4c2b51
Summary:
Adding a handwritten view config for RCTScrollView, to be used in DEV only (for now).
Changelog: [Internal]
Reviewed By: rickhanlonii
Differential Revision: D18263203
fbshipit-source-id: 975499f030c7caed9851bcde0be42c5058911ad5