
@reactnative: Check out our React Native Open Source update on our blog: [https://facebook.github.io/react-native/blog/2019/03/01/react-native-open-source-update](https://facebook.github.io/react-native/blog/2019/03/01/react-native-open-source-update)


Tweet from @reactnative


@reactnative: 👀 Landed Hooks in React Native at Facebook. Will be part of the 0.59 release.

[https://t.co/kXhUvCJ5D0](https://t.co/kXhUvCJ5D0)



## [v0.58.0](https://github.com/facebook/react-native/releases/tag/v0.58.0) on GitHub ([npm](https://www.npmjs.com/package/react-native))

---

## [Changelog](https://github.com/react-native-community/react-native-releases/blob/master/CHANGELOG.md#058)

---

Welcome to the January 2019 release of React Native. There are a number of significant changes in this version, and we'd like to especially call your attention to:

- [Modernizing](https://github.com/facebook/react-native/issues/21581) and [stengthening flow types](https://github.com/facebook/react-native/issues/22100) for core components
- Break changes to `ScrollView`, `CameraRollView`, and `SwipeableRow` that make it no longer bound to the component instance in certain methods
- Support for mutual TLS in WebKit
- Asset serving from directories besides `/assets`
- Numerous crash fixes and resolutions for unexpected behavior

Thanks to those who gave feedback on our release candidates. If you're interested in helping evaluate our next release, check you our tracking issue [here](data:,TODO%3A%20change%20this%20once%20the%20actual%20issue%20has%20been%20created).

### Added

- Add support for `publicPath` to enable serving static assets from different locations ([0b31496](https://github.com/facebook/react-native/commit/0b31496) by [@gdborton](https://github.com/gdborton))

#### Android specific

- Bundler server host can now be set using Android System Properties, making for easier debugging across multiple apps or app installs `adb shell setprop metro.host` ([e02a154](https://github.com/facebook/react-native/commit/e02a154) by [@stepanhruda](https://github.com/stepanhruda))
- Native Modules can now reject a promise with an additional `WritableMap` arg for extra properties (`userInfo`). See the interface defined in [`Promise.java`](https://github.com/facebook/react-native/blob/60b3942389be508935589df41c2a7203922cc5a7/ReactAndroid/src/main/java/com/facebook/react/bridge/Promise.java) for available methods. This is accessible in JavaScript as `Error.userInfo`. This is to match iOS's existing `Error.userInfo` behaviour. See PR for examples. (#20940 by @Salakar)
- Native Modules now expose a `nativeStackAndroid` property to promises rejected with an Exception/Throwable - making native error stacks available inside Javascript: `Error.nativeStackAndroid`. This is to match iOS's existing `Error.nativeStackIOS` support. See PR for examples. (#20940 by @Salakar)

#### iOS specific

- Add `moduleForName: lazilyLoadIfNecessary` to **RCTBridge.h** to lookup modules by name and force load them, plus various improvements to LazyLoading ([d7a0c44](https://github.com/facebook/react-native/commit/d7a0c44), [6534718](https://github.com/facebook/react-native/commit/6534718), [d7865eb](https://github.com/facebook/react-native/commit/d7865eb), [04ea976](https://github.com/facebook/react-native/commit/04ea976), [1f394fa](https://github.com/facebook/react-native/commit/1f394fa), [80f92ad](https://github.com/facebook/react-native/commit/80f92ad), and [81b74ec](https://github.com/facebook/react-native/commit/81b74ec) by [@dshahidehpour](https://github.com/dshahidehpour), [@fkgozali](https://github.com/fkgozali), and [@mmmulani](https://github.com/mmmulani))
- Add ability for **WebView** to `setClientAuthenticationCredential` when `useWebKit={true}` for mutual TLS authentication ([8911353](https://github.com/facebook/react-native/commit/8911353) by [@mjhu](https://github.com/mjhu))

### Changed

- Major improvements to Flow types for Core Components ([499c195](https://github.com/facebook/react-native/commit/499c195), [fbc5a4f](https://github.com/facebook/react-native/commit/fbc5a4f), [f9050e0](https://github.com/facebook/react-native/commit/f9050e0), [6476151](https://github.com/facebook/react-native/commit/6476151), [c03fc40](https://github.com/facebook/react-native/commit/c03fc40), [69213ee](https://github.com/facebook/react-native/commit/69213ee), [136dfc8](https://github.com/facebook/react-native/commit/136dfc8), [3c0211b](https://github.com/facebook/react-native/commit/3c0211b), [c127000](https://github.com/facebook/react-native/commit/c127000), [636e146](https://github.com/facebook/react-native/commit/636e146), [6fa997d](https://github.com/facebook/react-native/commit/6fa997d), [35a65cd](https://github.com/facebook/react-native/commit/35a65cd), [7927497](https://github.com/facebook/react-native/commit/7927497), [45c5183](https://github.com/facebook/react-native/commit/45c5183), [a97d104](https://github.com/facebook/react-native/commit/a97d104), [fb4825a](https://github.com/facebook/react-native/commit/fb4825a), [84c5416](https://github.com/facebook/react-native/commit/84c5416), [3649a50](https://github.com/facebook/react-native/commit/3649a50) by [@mottox2](https://github.com/mottox2), [@saitoxu](https://github.com/saitoxu), [@RSNara](https://github.com/RSNara), [@watanabeyu](https://github.com/watanabeyu), [@Tnarita0000](https://github.com/Tnarita0000), [@exced](https://github.com/exced), [@nd-02110114](https://github.com/nd-02110114), [@flowkraD](https://github.com/flowkraD))
- Many public components were converted to ES6 classes ([ScrollView](https://github.com/facebook/react-native/commit/221e2fe4095bc9ae15878725bdac4071d53e61f5) by [@thymikee](https://github.com/thymikee), [CameraRollView](https://github.com/facebook/react-native/pull/21619), [SwipeableRow](https://github.com/facebook/react-native/pull/21876/files) and [ProgressBarAndroid](https://github.com/facebook/react-native/pull/21874) by [@exceed](https://github.com/exceed), [ProgressViewIOS](https://github.com/facebook/react-native/pull/21588) by [@empyrical](https://github.com/empyrical), [SegmentedControlIOS](https://github.com/facebook/react-native/pull/21888/files), [ToolbarAndroid](https://github.com/facebook/react-native/pull/21893/files) by [@nd-02110114](https://github.com/nd-02110114)
- Flow dependency is now at v0.86.0 ([8fb228f](https://github.com/facebook/react-native/commit/8fb228f) by [@panagosg7](https://github.com/panagosg7))
- metro dependency is now at v0.49.1 ([f867db3](https://github.com/facebook/react-native/commit/f867db3), [8888295](https://github.com/facebook/react-native/commit/8888295), [31bb551](https://github.com/facebook/react-native/commit/31bb551), [de60e86](https://github.com/facebook/react-native/commit/de60e86), and [a525941](https://github.com/facebook/react-native/commit/a525941) by [@alexkirsz](https://github.com/alexkirsz) and [@rafeca](https://github.com/rafeca))
- jest dependency is now at v24.0.0-alpha.6 ([1b4fd64](https://github.com/facebook/react-native/commit/1b4fd64), [66aba09](https://github.com/facebook/react-native/commit/66aba09), and [06c13b3](https://github.com/facebook/react-native/commit/06c13b3) by [@rafeca](https://github.com/rafeca) and [@rubennorte](https://github.com/rubennorte))
- fbjs-scripts dependency is now at v1.0.0 (#21880) ([cdbf719](https://github.com/facebook/react-native/commit/cdbf719) by [@jmheik](https://github.com/jmheik))
- folly dependency is now at v2018.10.22.00 ([a316dc6](https://github.com/facebook/react-native/commit/a316dc6), [19a7ecc](https://github.com/facebook/react-native/commit/19a7ecc), and [a70625a](https://github.com/facebook/react-native/commit/a70625a) by [@Kudo](https://github.com/Kudo) and [@radko93](https://github.com/radko93))
- React sync for revisions 4773fdf...6bf5e85 ([0cb59b5](https://github.com/facebook/react-native/commit/0cb59b5) and [e54d1e2](https://github.com/facebook/react-native/commit/e54d1e2) by [@yungsters](https://github.com/yungsters))
- Clearer error messages when hot reloading ([c787866](https://github.com/facebook/react-native/commit/c787866) by [@alexkirsz](https://github.com/alexkirsz))
- Allow CxxModules to implement functions which take two callbacks ([8826d8b](https://github.com/facebook/react-native/commit/8826d8b) by [@acoates-ms](https://github.com/acoates-ms))

#### Breaking Changes

- Public methods of components converted to ES6 classes are no longer bound to their component instance. For `ScrollView`, the affected methods are `setNativeProps`, `getScrollResponder`, `getScrollableNode`, `getInnerViewNode`, `scrollTo`, `scrollToEnd`, `scrollWithoutAnimationTo`, and `flashScrollIndicators`. For `CameraRollView`, the affected methods are: `rendererChanged`. For `SwipeableRow`, the affected methods are: `close`. Therefore, it is no longer safe to pass these method by reference as callbacks to functions. Auto-binding methods to component instances was a behaviour of `createReactClass` that we decided to not preserve when switching over to ES6 classes.

#### Android specific

- Optimize `PlatformConstants.ServerHost`, `PlatformConstants.isTesting`, and `PlatformConstants.androidID` for performance ([2bf0d54](https://github.com/facebook/react-native/commit/2bf0d54), [339d9d3](https://github.com/facebook/react-native/commit/339d9d3), and [9f9390d](https://github.com/facebook/react-native/commit/9f9390d) by [@stepanhruda](https://github.com/stepanhruda), [@fkgozali](https://github.com/fkgozali), and [@axe-fb](https://github.com/axe-fb))

#### iOS specific

- Suppress yellow box about missing export for native modules ([5431607](https://github.com/facebook/react-native/commit/5431607) by [@fkgozali](https://github.com/fkgozali))

### Removed

- Remove `UIManager.measureViewsInRect()` ([d623679](https://github.com/facebook/react-native/commit/d623679) by [@shergin](https://github.com/shergin))

### Fixed

- Fix potential UI thread stalling scenario from Yoga JNI bindings ([2a8f6c3](https://github.com/facebook/react-native/commit/2a8f6c3) by [@davidaurelio](https://github.com/davidaurelio))
- Fix crash happening due to race condition around bridge cxx module registry ([6770b53](https://github.com/facebook/react-native/commit/6770b53), [1c31919](https://github.com/facebook/react-native/commit/1c31919), and [188cbb0](https://github.com/facebook/react-native/commit/188cbb0) by [@PeteTheHeat](https://github.com/PeteTheHeat))
- Fix **View** and **Text**'s displayName; show the specific name rather than generic "Component" ([7a914fc](https://github.com/facebook/react-native/commit/7a914fc) by [@rajivshah3](https://github.com/rajivshah3))
- Fix `react-native init --help` so that it doesn't return `undefined` ([58732a8](https://github.com/facebook/react-native/commit/58732a8) by [@ignacioola](https://github.com/ignacioola))
- Fix `react-native --sourceExts` ([ce86080](https://github.com/facebook/react-native/commit/ce86080) by [@elyalvarado](https://github.com/elyalvarado))
- Fix accidental showing of **Modal** when `visible` prop is undefined or null ([cc13a73](https://github.com/facebook/react-native/commit/cc13a73) by [@MateusAndrade](https://github.com/MateusAndrade))
- Fix crash during **VirtualizedList** pagination ([5803772](https://github.com/facebook/react-native/commit/5803772))
- Fix scenario where removing a module with remote debugging and Delta bundles may cause incorrect stack traces ([bea57d8](https://github.com/facebook/react-native/commit/bea57d8) by [@alexkirsz](https://github.com/alexkirsz))

#### Android specific

- Fix crash when removing root nodes ([b649fa9](https://github.com/facebook/react-native/commit/b649fa9) by [@ayc1](https://github.com/ayc1))
- Fix various **ReactInstanceManager** deadlocks and race conditions ([df7e8c6](https://github.com/facebook/react-native/commit/df7e8c6), [309f85a](https://github.com/facebook/react-native/commit/309f85a), and [be282b5](https://github.com/facebook/react-native/commit/be282b5) by [@ayc1](https://github.com/ayc1))
- Fix IllegalArgumentException when dismissing ReactModalHostView and DialogManager ([e57ad4e](https://github.com/facebook/react-native/commit/e57ad4e) and [38e01a2](https://github.com/facebook/react-native/commit/38e01a2)by [@mdvacca](https://github.com/mdvacca))
- Fix incorrect merged asset path with flavor for Android Gradle Plugin 3.2 ([e90319e](https://github.com/facebook/react-native/commit/e90319e) by [@yatatsu](https://github.com/yatatsu))
- Fix HTTP connection ontimeout callback ([a508134](https://github.com/facebook/react-native/commit/a508134))
- Fix websocket properly closing when remote server initiates close ([2e465bc](https://github.com/facebook/react-native/commit/2e465bc) by [@syaau](https://github.com/syaau))
- Fix compatibility issue for Android 16 device ([5939d07](https://github.com/facebook/react-native/commit/5939d07), [f22473e](https://github.com/facebook/react-native/commit/f22473e), and [d4d457b](https://github.com/facebook/react-native/commit/d4d457b) by [@gengjiawen](https://github.com/gengjiawen))
- Fix issue where `Image.resizeMode` isn't respected while source is loading, resulting in unexpected padding ([673ef39](https://github.com/facebook/react-native/commit/673ef39) by [@dulmandakh](https://github.com/dulmandakh))
- Fix Android 28's inverted **ScrollView** so that momentum is in the proper direction ([b971c5b](https://github.com/facebook/react-native/commit/b971c5b) by [@mandrigin](https://github.com/mandrigin))

#### iOS specific

- Fix case where content of inline views didn't get relaid out ([798517a](https://github.com/facebook/react-native/commit/798517a) by [@rigdern](https://github.com/rigdern))
- Fix issue with **ImagePickerIOS**'s inconsistent image when using the front-facing camera ([4aeea4d](https://github.com/facebook/react-native/commit/4aeea4d))
- Fix race condition and crash around shutdown of the JSC for iOS 11 and earlier ([bf2500e](https://github.com/facebook/react-native/commit/bf2500e) by [@mhorowitz](https://github.com/mhorowitz))
- Fix crash in **NetInfo**'s \_firstTimeReachability ([eebc8e2](https://github.com/facebook/react-native/commit/eebc8e2) by [@mmmulani](https://github.com/mmmulani))
- Fix case where inline view is visible even though it should have been truncated ([70826db](https://github.com/facebook/react-native/commit/70826db) by [@rigdern](https://github.com/rigdern))
- Fix crash with **ScrollView** related to content offsets ([f6566c7](https://github.com/facebook/react-native/commit/f6566c7) by [@shergin](https://github.com/shergin))


React Native January 2019  (v0.58.x) released


@reactnative: Our plan for React Native in open source [https://t.co/Sqx4X2nkm1](https://t.co/Sqx4X2nkm1)



@reactnative: We've been working on a new architecture for React Native. Learn all about it in @nparashuram's talk at React Conf:  
[https://t.co/M22Y5Hg1jT](https://t.co/M22Y5Hg1jT)
