Summary:
Add annotations to function parameters required for Flow's Local Type Inference project. This codemod prepares the codebase to match Flow's new typechecking algorithm. The new algorithm will make Flow more reliable and predictable.
Details:
- Codemod script: `scripts/flow/tool add-comments --all --code missing-local-annot --comment "The type annotation(s) required by Flow's LTI update could not be added via codemod" .`
- Local Type Inference announcement: [post](https://fb.workplace.com/groups/flowlang/posts/788206301785035)
- Codemod announcement: [post](https://fb.workplace.com/groups/flowlang/posts/917522612186736)
- Support group: [Flow Support](https://fb.workplace.com/groups/flow)
bypass-lint
drop-conflicts
Reviewed By: evanyeung
Differential Revision: D37403582
fbshipit-source-id: 2024542952042dd93e2c123ba047410e1feca749
Summary:
Refs https://github.com/facebook/react-native/issues/28711
This PR moves Hermes badge component from the template to the `NewAppScreen` library. The main motivation behind this change was to simplify a bit template code.
I assumed that it is not important to expose `global.HermesInternal` to the template users:
* If this assumption is true, I think that there are no other reason to leave this component inside `App` in comparison to other `NewAppScreen` components,
* If this assumption is false, I can adjust this PR and move `HermesInternal` check from the badge component to the `App`.
I was trying to avoid calling `useColorScheme` when Hermes is disabled, but placing hook inside the conditional branch causes ESLint warning (react-hooks/rules-of-hooks).
This PR includes also small style tweaks for the badge - since there are no background padding can be omitted and spacing can be added adjusted tweaking `top` and `left` properties and `fontSize` has been adjusted just for the readability.
In the last commit, I have gone a bit further and moved `HermesBadge` to the `Header` component and I have also changed slightly the `Header` title (React -> React Native) and it's styling.
> I'm not sure if after this change `HermesBadge` export in `NewAppScreen` components list is still required, but maybe this badge will be useful for someone. If it's a mistake I can update the PR and remove this export.
## Changelog
[Internal][Changed] move Hermes badge from the template to the NewAppScreen library
Pull Request resolved: https://github.com/facebook/react-native/pull/28783
Test Plan:
Template app do not redbox on Android emulator with and without Hermes enabled.
## Preview
Android with Hermes enabled and adjusted header:

iOS with adjusted header:

Reviewed By: GijsWeterings
Differential Revision: D22493822
Pulled By: cpojer
fbshipit-source-id: 3440e10f2d59f268ca8851a6e002f0ff23fa839c
Summary:
This PR adds support for the dark mode and dynamic theme changing to the default App template and to the related `NewAppScreen` components. Using `useColorScheme` hook forced me to refactor a bit main `App.js` file, but I think those changes are step in the right direction according to way in which React Native is used in larger apps, so new `Section` component has been extracted to reduce code redundancy/repetition inside `App`.
Additional color `darker` has been added to the `Colors` statics from `NewAppScreen` because `dark` was too bright for the Dark Mode backgrounds.
Also main `StoryBoard` on iOS has been updated to use theme based colors instead of static or hardcoded ones. There was also an unused, empty `Label` which I have removed.
~~I'm not so much experienced with Android. If someone could also update Android splash screen (if Android requires such change) it will be nice. I want to look at this later using simulator.~~
> I have updated the Android splash screen and tested this change on the Android emulator.
If you have any comment or corrections feel free to post them out, I would like to put more work into this PR if it's needed. Dark Mode this days is a part of near every OS, so it could be considered as a standard feature. I hope those changes helps people which struggle with the basic theming implementation (+ there is now an example of hook and `children` prop usage in the template).
## Changelog
[Internal] [Added] - Add dark mode support to the default app template
Pull Request resolved: https://github.com/facebook/react-native/pull/28711
Test Plan:
I have tested the App from the template on the iOS device and in Android emulator with RN `0.63.0-rc`.
Screen recording on iOS (demonstarates both modes, both splash screens and transition):

Screenshot of iOS app in Dark Mode:

Screenshot of iOS app splash screen in Dark Mode:

Screenshot of Android app in the emulator:

Differential Revision: D21236148
Pulled By: shergin
fbshipit-source-id: 0c8a9534d3a3f8f8099af939243a889ac4df6cda
Summary:
Need to add explicit type annotations in these areas to unblock types-first architecture for Flow. These are locations the codemod could not automatically handle.
I'll call out areas I need a close eye on in the comments.
Reviewed By: panagosg7
Differential Revision: D16659053
fbshipit-source-id: 167dd2abe093019b128676426374c1c62cf71e7f
Summary:
use "shorthand" of `Fragment`
No need to import `Fragment` as it can be used via `<></>` vs `<Fragment><Fragment />`
## Changelog
Use shorthand for Fragment in App.js
[General] [Changed] - Use shorthand for Fragment in App.js
Pull Request resolved: https://github.com/facebook/react-native/pull/25905
Test Plan: Ci Tests should be sufficient
Differential Revision: D16666166
Pulled By: cpojer
fbshipit-source-id: 70e2c9793087bf8f5e0a5477c75f178134cbd6a1
Summary:
Yesterday we shipped hermesengine.dev as part of the current 0.60 release. This PR brings those changes to master.
## Changelog
[General] [Added] - Added support for Hermes
Pull Request resolved: https://github.com/facebook/react-native/pull/25613
Test Plan:
* CI is green both on GitHub and at FB
* Creating a new app from source can use Hermes on Android
Reviewed By: cpojer
Differential Revision: D16221777
Pulled By: willholen
fbshipit-source-id: aa6be10537863039cb666292465ba2e1d44b64ef
Summary:
1. Consistency with full stops (you can see screenshots in https://github.com/facebook/react-native/pull/24783 )
2. Improvements to the wording, describing what you're going to see
## Changelog
[Internal] [Fixed] - Improves the copy for the new app screen
Pull Request resolved: https://github.com/facebook/react-native/pull/24918
Differential Revision: D15391421
Pulled By: cpojer
fbshipit-source-id: 2ec6d2d5bd4845c5f4c699838ae865ab4217e49e
Summary:
This PR fixes the content being shown behind the `StatusBar` in the new app template, was only happening in iOS.
## Changelog
[General] [Changed] - Fix content being shown behind `StatusBar` in the new app template.
Pull Request resolved: https://github.com/facebook/react-native/pull/24868
Differential Revision: D15353748
Pulled By: cpojer
fbshipit-source-id: 4c84a65d9f8e85e5558d447533e381126c971e38
Summary:
This replaces the "new app screen" in the template with the new design from https://github.com/react-native-community/discussions-and-proposals/issues/122
This uses components that are shipped as part of the `react-native` module, but not necessarily as proper components exported by the main `react-native` module. To use these, we use absolute imports to those components.
Related to #24760
[General] [Changed] - Updated new app template design 💖
Pull Request resolved: https://github.com/facebook/react-native/pull/24805
Differential Revision: D15334459
Pulled By: cpojer
fbshipit-source-id: d0b67d08f936eeabd9e93d4e0ff78302b4d6429f
Summary: This diff moves the React Native template from `local-cli/templates/HelloWorld` to `template`. Keeping it in the react-native repo will allow us to make changes to the template and version it together with react-native, instead of moving it out into a separate repo and trying to keep the template in sync with RN.
Reviewed By: TheSavior
Differential Revision: D13372949
fbshipit-source-id: e68e267b4dcf6384535d7b48fc11e297a12e9676