Summary:
Scrolling improvements in ReactAndroid:
1.
Issue: With current ReactHorizontalScrollView behavior, it treats all views as focusable, regardless of if they are in view or not. This is fine for non-paged horizontal scroll view, but when paged this allows focus on elements that are not within the current page. Combined with logic to scroll to the focused view, this breaks the paging for ReactHorizontalScrollView.
Fix: limit the focusable elements to only elements that are currently in view when ReactHorizontalScrollView has paging enabled
2.
Issue: When keyboard is attached and user tries to navigate through Tab key, Scroll views do not scroll to the focused child.
Since ReactScrollView handles layout changes on JS side, it does not call super.onlayout due to which mIsLayoutDirty flag in android ScrollView remains true and prevents scrolling to child when requestChildFocus is called.
Fix: To fix the focus navigation, we are overriding requestChildFocus method in ReactScrollView. We are not checking any dirty layout flag and scrolling to child directly. This will fix focus navigation issue for KeyEvents which are not handled by android's ScrollView, for example: KEYCODE_TAB. Same applies to ReactHorizontalScrollView.
3.
Set Android ScrollView to be non-focusable when scroll is disabled. Prior to this change, non-scrollable Scrollview would still be focusable, causing a poor keyboarding experience
## Changelog
[Android] [Fixed] Scrolling improvements in ReactAndroid
Pull Request resolved: https://github.com/facebook/react-native/pull/25105
Differential Revision: D15737563
Pulled By: mdvacca
fbshipit-source-id: 0d57563415c68668dc1acb05fb3399e6645c9595
Summary: This moves the Toolbar Java files out RN and into our internal React shell.
Reviewed By: fkgozali
Differential Revision: D15469205
fbshipit-source-id: 15298505d74260618eb89673deb12d1b837b559f
Summary:
This diff fixes the bug of the switch component on Android being stuck in the middle when a user releases their finger whily dragging the thumb.
When a user releases their finger while dragging the thumb, `setChecked` will be called and if `mAllowChange` is set to false, `super.setChecked` is never called. The supper method will actually make sure the thumb will be animated to the correct edge. Without calling the super method, the thumb might stay in the middle of the switch where a user released their finger.
The fix had to be applied both to ReactSwitch and FbReactSwitchCompat.
One more fix had to be made to FbReactSwitchCompat since D5884661 was applied to ReactSwitch, but not to FbReactSwitchCompat:
if (mAllowChange && **isChecked() != checked**) {
...
}
Reviewed By: mdvacca
Differential Revision: D15535611
fbshipit-source-id: 22ca1fe3fa993ae65cbd677bfae2208a02c368d4
Summary:
Add prop showSoftInputOnFocus to TextInput. This fixes#14045. This prop can be used to prevent the system keyboard from displaying at all when focusing an input text, for example if a custom keyboard component needs to be displayed instead.
On Android, currently TextInput always open the soft keyboard when focused. This is because `requestFocus` calls `showSoftKeyboard`, which in turn instructs `InputMethodManager` to show the soft keyboard.
Unfortunately even if we were to define a new input type that extends ReactEditText, there is no way to overcome this issue.
This is because `showSoftKeyboard` is a private method so it can't be overriden. And at the same time `requestFocus` needs to invoke `super.requestFocus` to properly instruct Android that the field has gained focused, so overriding `requestFocus` in a subclass of ReactEditText is also not an option, as when invoking `super.requestFocus` we would end up calling again the one defined in ReactEditText.
So currently the only way of doing this is to basically add a listener on the focus event that will close the soft keyboard immediately after. But for a split second it will still be displayed.
The code in the PR changes `requestFocus` to honor showSoftInputOnFocus as defined in Android TextView, displaying the soft keyboard unless instructed otherwise.
## Changelog
[Android] [Added] - Add showSoftInputOnFocus to TextInput
Pull Request resolved: https://github.com/facebook/react-native/pull/25028
Differential Revision: D15503070
Pulled By: mdvacca
fbshipit-source-id: db4616fa165643d6ef2b3185008c4d279ae08092
Summary:
Changelog: [Android] [FIXED] - Fix backgroundColor top level prop of TextInput
This diff fixes two issues with the `backgroundColor` top level property of TextInput on Android:
* Now it is possible to set a **string** value for the top-level `backgroundColor` property of TextInput (crashed the app previously):
```
<TextInput backgroundColor="#ffccbb">Hello, React Native</TextInput>
```
* Now it's possible to set an **integer** value for the top-level `backgroundColor` property of TextInput (had no effect previously):
```
<TextInput backgroundColor={0xffccbbff}>Hello, React Native</TextInput>
```
A `customType = "Color"` annotation parameter must be provided for `ReactBaseTextShadowNode.setBackgroundColor(...)` since the color value must be previously processed in JS before sending it over the bridge to the native code. The JS code will parse the color value and return the proper ARGB color integer to the native platforms (https://fburl.com/uqup52tn).
Without providing the custom type for the background color, if a string value is set for the top-level `backgroundColor` property in the JS code, the Android code will crash since it expects an integer value for the color in `ReactBaseTextShadowNode.setBackgroundColor(...)`, but a string will be passed from JS without any conversion and there will be a `ClassCastException` thrown. If an integer value without the alpha component (like `0xffccbb`) is set, the Android native view would get an integer color value with its alpha component set to `0x00`, which means a transparent color.
On a side note: the alpha component of a color must always be set when using an integer value for `backgroundColor` since the JS code, while processing the color type, shifts the rightmost 8 bytes (alpha component) to the leftmost position. If those 8 bytes are not the alpha component, you will get the wrong color in the end. It doesn't seem to be a problem for string values of `backgroundColor` though.
Reviewed By: mdvacca
Differential Revision: D15453980
fbshipit-source-id: f3f5d9c9877cdbce79a67f2ed93ad4589576d166
Summary: As of D14529038, LayoutAnimations can sometimes throw an exception due to the view being null. This can happen when elements are removed/added and is not fixable in product code. This is a temporary fix - the root cause for this issue will be fixed soon.
Reviewed By: lunaleaps
Differential Revision: D15428791
fbshipit-source-id: 41200e572ed7d5d470754792c5576a0ea23fe946
Summary:
We're working on a custom EditText that supports some rich text editing, and one of the places where our logic has to be different from the textinput provided by RN is the text setting logic:
https://github.com/facebook/react-native/blob/7abfd23b90db08b426c3c91b0cb6d01d161a9b9e/ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactEditText.java#L377
However, some of the important members are private and our subclass cannot access them (we work around this now with reflection). It would be nice if we could work with them directly, either using getters and setters or by changing the access. Let me know what you think about this. Thanks.
## Changelog
[Android] [Added] - allow custom maybeSetText logic for ReactEditText subclasses
Pull Request resolved: https://github.com/facebook/react-native/pull/24927
Differential Revision: D15431682
Pulled By: cpojer
fbshipit-source-id: 91860cadac0798a101ff7df6f6b868f3980ba9b1
Summary:
The `measure` API receives LocalData and Props, it should also receive State.
This will also be used in future diffs.
Reviewed By: mdvacca
Differential Revision: D15325182
fbshipit-source-id: 6cb46dd603ce7d46673def16f0ddb517e2cf0c4f
Summary:
Fixes#13351
Two root causes:
1. Android Spinner will reset selection to undefined after setAdapter()
which will trigger onValueChange().
The behavior is not expected for RN.
And the solution is to setSelection() explicitly
2. In original implementation, it setups `items` immediately,
but delays the `selected` setup after update transaction.
There will be some race condition and incosistency
if update `items` only.
The fix will do the setup all after update transaction.
[Android] [Fixed] - Fix#13351 PickerAndroid will reset selected value during items update.
Pull Request resolved: https://github.com/facebook/react-native/pull/24793
Differential Revision: D15293516
Pulled By: cpojer
fbshipit-source-id: 5a99a60015c7e1b2968252cdc0b2661d52a15b9d
Summary:
In https://github.com/facebook/react-native/pull/23865, RN introduced support for custom fonts the Android Way. But it introduced performance regression because it'll lookup for a font using getIdentifier() every time fontFamily changed. This PR fixes regression by requiring custom fonts to be listed in **fonts** array, and populating **mTypeCache** at first use using the list.
[Android] [Changed] - Require custom fonts to list in **fonts** array. Fixes performance regression.
Pull Request resolved: https://github.com/facebook/react-native/pull/24595
Reviewed By: mdvacca
Differential Revision: D15184590
Pulled By: fkgozali
fbshipit-source-id: e3feb2396609583ebc95101130186a1f5af931da
Summary:
Resolve#24690
This is very simple unicode detecting. Should I improve this solution creating StringsUtils for detecting unicodes in whole react-native project ?
[Android][Fixed] onKeyPress method is calling, when user type emoji
Pull Request resolved: https://github.com/facebook/react-native/pull/24717
Differential Revision: D15238388
Pulled By: cpojer
fbshipit-source-id: 038b1040e1c44fd6f9401a3988a782f5778e1209
Summary:
Hello Everyone, this series of commits helps to fix problems related to ART on Android. The main problem in here is that the ART components would disappear if the user turns off the screen and then turn it on again. It's important to note that this behaviour only occurs after Android N (7.1 or higher).
Pull Request resolved: https://github.com/facebook/react-native/pull/22624
Differential Revision: D15122573
Pulled By: cpojer
fbshipit-source-id: e7fb8b9280b4c52562e3d0c1a89759d4d31cd53d
Summary:
React Native Environment Info:
System:
OS: Linux 4.15 Ubuntu 18.04.1 LTS (Bionic Beaver)
CPU: (4) x64 Intel(R) Core(TM) i5-7300U CPU @ 2.60GHz
Memory: 1.12 GB / 15.55 GB
Shell: 4.4.19 - /bin/bash
Binaries:
Node: 8.10.0 - /usr/bin/node
Yarn: 1.13.0 - /usr/local/bin/yarn
npm: 3.5.2 - /usr/bin/npm
SDKs:
Android SDK:
API Levels: 16, 19, 22, 23, 24, 25, 26, 27, 28
Build Tools: 23.0.1, 23.0.3, 25.0.0, 25.0.2, 25.0.3, 26.0.1, 26.0.3, 27.0.3, 28.0.2, 28.0.3
System Images: android-16 | Google APIs Intel x86 Atom, android-19 | Google APIs Intel x86 Atom, android-24 | Google Play Intel x86 Atom, android-27 | Google APIs Intel x86 Atom, android-28 | Intel x86 Atom_64, android-28 | Google APIs Intel x86 Atom, android-28 | Google Play Intel x86 Atom
npmPackages:
react: 16.8.6 => 16.8.6
react-native: git+https://github.com/facebook/react-native.git#v0.59.5 => 0.59.5
npmGlobalPackages:
react-native-cli: 2.0.1
react-native-git-upgrade: 0.2.7
The workaround implemented in https://github.com/facebook/react-native/pull/21117 tries to fix
https://issuetracker.google.com/issues/112385925 scroll direction (according to the latest comments, the scroll direction problem has been reverted in security patches so not sure if the workaround is still valid).
But... proposed solution in fling method is using signum which leads to zero computedVelocityY in case of zero mOnScrollDispatchHelper.getYFlingVelocity() on old devices(Samsung s4 mini) even when real velocityY is non zero
```
final int correctedVelocityY = (int)(Math.abs(velocityY) * Math.signum(mOnScrollDispatchHelper.getYFlingVelocity()));
```
Proposed solution is to take signum from original velocityY in case of zero
```
float signum = Math.signum(mOnScrollDispatchHelper.getYFlingVelocity());
if (signum == 0) {
signum = Math.signum(velocityY);
}
final int correctedVelocityY = (int)(Math.abs(velocityY) * signum);
```
The symptoms are the same as described in issue https://github.com/facebook/react-native/issues/22925, but proposed workaround doesn't work.
[Android][fixed] - Fix smooth scrolling on old devices (SDK >=16)
Pull Request resolved: https://github.com/facebook/react-native/pull/24545
Differential Revision: D15044834
Pulled By: cpojer
fbshipit-source-id: 3f523eb1a438df774e22387aecded433b9031ab9
Summary: It seems like ReactContext isn't actually needed in measure functions. Changing the signature of ViewManager.measure() to take a Context instead.
Reviewed By: lunaleaps
Differential Revision: D14940330
fbshipit-source-id: b29987fd1d7f9c191a5f26138151082ca61cb351
Summary:
In order to meet our accessibility requirements we need to have full support for keyboard navigation. The Touchable components works with press/tap with a finger, but doesn't respond to 'enter' when using a keyboard. Navigation works fine. This PR adds an onClick listener to touchable views that have the onPress prop defined.
[Android] [Added] - Add View.OnClickListener to Touchable components when onPress is defined
Pull Request resolved: https://github.com/facebook/react-native/pull/24359
Differential Revision: D14971230
Pulled By: cpojer
fbshipit-source-id: ca5559ca1308ee6c338532a00dcea4d00fa57f42
Summary: This is removing packages and libraries from the repo. Any modified buck files simply change the redirect targets to something more appropriate (no logic actually changed)
Differential Revision: D14950721
fbshipit-source-id: 6c14f827b76ca1dbaf83dcb983930f362c6a27d4
Summary:
Would like feedback from the community as this may not be the best solution for all
I would like to restrict (or paginate) the fling of a horizontal ScrollView when `snapToInterval` is set. This is not currently possible with `pagingEnabled`, since the pagination works only when items are the entire width of the ScrollView.
This implementation simply restricts the predicted `targetOffset` found from the `x` velocity and replaces it with the offset when the pan gesture ended.
To get pagination working, I may paginate based on the interval by calculating the offset delta from the beginning of the gesture to current offset and restricting the scrolling behavior to the `snapToInterval`. If this is preferred, I can update this PR or make a new one, but wanted to start a discussion since it seems like there are many in the community that would like this feature #21302 .
[General] [Added] - add prop `disableIntervalMomentum` to disable the predictive scrolling behavior of horizontal ScrollViews
Pull Request resolved: https://github.com/facebook/react-native/pull/24045
Differential Revision: D14939754
Pulled By: sahrens
fbshipit-source-id: 26be19c47dfb8eed4d7e6035df53a77451e23081
Summary: Similar to iOS, here we provide the basic impl of unimplemented view.
Reviewed By: mdvacca
Differential Revision: D14895706
fbshipit-source-id: 9053edfb2175b370d9070b6921794dbcafa1f37a
Summary:
Android API 26 and Android Support Library 26 added support for font resource type and native/downloadable fonts. It allows apps to easily download fonts from online providers, but also use of various font weights other than normal and bold, like medium. So it deprecated APIs for asset fonts, and should be removed in the future.
Advantages:
- Just copy font files in res/font and use it specifying filename (without extension) in fontFamily
- Define custom font-family using XML file (in res/font) and font files, it may have many weights and styles. See PR for example.
- Define configuration to download fonts from online font providers, and use it.
See https://developer.android.com/guide/topics/ui/look-and-feel/fonts-in-xml and https://developer.android.com/guide/topics/ui/look-and-feel/downloadable-fonts
[Android] [Changed] - add support for custom/downloadable fonts
Pull Request resolved: https://github.com/facebook/react-native/pull/23865
Differential Revision: D14506542
Pulled By: hramos
fbshipit-source-id: 67ba3148fb4b548cdbc779213cf6c1b2c3baffd2
Summary:
Fixes#22511
I understand the motivation of adding extraRadiusForOutline to corner radius: without it there can be an empty space between border and view's background color.
So I add simple check: if corner radius is more than zero we still add extraRadiusForOutline. And if not, we don't add it to prevent all the corners to become slightly curved.
[GENERAL] [Fixed] - fix of Android's bug that causes all the corners to become slightly curved if only specific corners' radius should be more than zero.
Pull Request resolved: https://github.com/facebook/react-native/pull/24390
Differential Revision: D14870476
Pulled By: cpojer
fbshipit-source-id: df40fc584a2f8badc499413cb3c4e4d96b9e18cf
Summary:
Since text and selection has dependency, handle text selection in
updateExtraData as well.
The root cause is due to setText is handled on extra data update but setSelection is handled on set property. And extra data update will be handled after all properties are handled. Since selection and text has dependency, move selection to extra data update as well.
Changelog:
----------
[Android] [Fixed] - Fix crash when set text and selection on textinput at the same time
Pull Request resolved: https://github.com/facebook/react-native/pull/22723
Differential Revision: D14783791
Pulled By: cpojer
fbshipit-source-id: a4065f3e151d23f4813d76e91d68362cfd4daaf4
Summary:
It seems that the content view can sometimes be null when onOverScrolled is called (presumably when the scrollview gets unmounted while it's in the middle of scrolling?).
Changelog: [Android][fixed] - Guard against content view being null in onOverScrolled.
Reviewed By: mdvacca
Differential Revision: D14737534
fbshipit-source-id: e88ec6f585e50517b734a8809fc3843c0b22df10
Summary: This moves the Java files to FB internal and updates all the buck files
Reviewed By: TheSavior
Differential Revision: D14622521
fbshipit-source-id: a8d293e9f9e08868cca3ed2986a08d0db16dec15
Summary:
Try to prevent the crash described in https://github.com/facebook/react-native/issues/17530
There seems to be a bug in `Drawable.mutate()` in some devices/android os versions even after you check the constant state. This error is hard to reproduce and to fix, so just try to catch the exception to prevent crash.
[Android][Fixed] Prevent random crash when setting underlineColorAndroid
Pull Request resolved: https://github.com/facebook/react-native/pull/24183
Differential Revision: D14710484
Pulled By: cpojer
fbshipit-source-id: 3af20a5cb0ecd40839beaf85118c0f5aa6905414
Summary:
Potential breaking change: The signature of ReactShadowNode's onBeforeLayout method was changed
- Before: public void onBeforeLayout()
- After: public void onBeforeLayout(NativeViewHierarchyOptimizer nativeViewHierarchyOptimizer)
Implements same feature as this iOS PR: https://github.com/facebook/react-native/pull/7304
Previously, only Text and Image could be nested within Text. Now, any view can be nested within Text. One restriction of this feature is that developers must give inline views a width and a height via the style prop.
Previously, inline Images were supported via FrescoBasedReactTextInlineImageSpan. To get support for nesting views within Text, we create one special kind of span per inline view. This span is called TextInlineViewPlaceholderSpan. It is the same size as the inline view. Its job is just to occupy space -- it doesn't render any visual. After the text is rendered, we query the Android Layout object associated with the TextView to find out where it has positioned each TextInlineViewPlaceholderSpan. We then position the views to be at those locations.
One tricky aspect of the implementation is that the Text component needs to be able to render native children (the inline views) but the Android TextView cannot have children. This is solved by having the native parent of the ReactTextView also host the inline views. Implementation-wise, this was accomplished by extending the NativeViewHierarchyOptimizer to handle this case. The optimizer now handles these cases:
- Node is not in the native tree. An ancestor must host its children.
- Node is in the native tree and it can host its own children.
- (new) Node is in the native tree but it cannot host its own children. An ancestor must host both this node and its children.
I added the `onInlineViewLayout` event which is useful for writing tests for verifying that the inline views are positioned properly.
Limitation: Clipping
----------
If Text's height/width is small such that an inline view doesn't completely fit, the inline view may still be fully visible due to hoisting (the inline view isn't actually parented to the Text which has the limited size. It is parented to an ancestor which may have a different clipping rectangle.). Prior to this change, layout-only views had a similar limitation.
Pull Request resolved: https://github.com/facebook/react-native/pull/23195
Differential Revision: D14014668
Pulled By: shergin
fbshipit-source-id: d46130f3d19cc83ac7ddf423adcc9e23988245d3
Summary:
Add the ability to set a custom handler on ReactWebViewManager to handle client certificate challenges during TLS authentication.
[Android][Added] - Public method setCustomClientCertRequestHandler to the native com.facebook.react.views.webview.ReactWebViewManager, that allows using a custom response for client certificate challenges.
Reviewed By: mjhu
Differential Revision: D14609697
fbshipit-source-id: 567c95458af638d1f8233fc3ca0d9cefc061c2bf
Summary:
We want the ability to use Linkify on android text elements. This only adds this property to Text and not TextInput since there are some functional differences with how the types could be used between iOS and android - iOS allows one or many types while Linkify restricted us to providing only one option (using the masks).
Performance is affected ONLY FOR TEXT ELEMENTS USING THIS FEATURE since Linkify is searching for patterns.
Pull Request resolved: https://github.com/facebook/react-native/pull/19216
Differential Revision: D14621883
Pulled By: cpojer
fbshipit-source-id: cb692021d314140b9a92b29e23384afd7fd1b09e
Summary: This diff fixes an IllegalStateException that is thrown when the user click is on a edit text and tap 'Next' on the keyboard to focus on the next view, but the next view is hidden.
Reviewed By: lunaleaps, mmmulani
Differential Revision: D14598410
fbshipit-source-id: 2999cc468ed24bedff163eedcfaec50f6ee005d6
Summary:
Google recommends to use Gravity.START and Gravity.END instead of Gravity.LEFT and Gravity.RIGHT to support RTL better.
[Android] [Changed] - Improve RTL support
Pull Request resolved: https://github.com/facebook/react-native/pull/24069
Differential Revision: D14541569
Pulled By: cpojer
fbshipit-source-id: 5c104d8bd666e1270d5410216c7f2efa6152692a
Summary:
This diff migrates RN to AndroidX.
As part of this diff I disabled few tests in RNAndroid OSS that will be re-enabled this week. As part of the refactor of BUCK files in OSS
Reviewed By: shergin
Differential Revision: D14200097
fbshipit-source-id: 932fcae251d1553e672acd67ecd0e703dcb364aa
Summary:
fixes#23962, where trackColor is reset when value changed. This PR will set trackColor corresponding trackColor every-time value changes.
[Android] [Changed] - Fix Switch trackColor
Pull Request resolved: https://github.com/facebook/react-native/pull/23977
Differential Revision: D14495206
Pulled By: hramos
fbshipit-source-id: d712f540cd3f8359d6e85f79c12732689870a112
Summary:
Autofill Hints were added in [Android API 26](https://developer.android.com/reference/android/view/View.html#setAutofillHints(java.lang.String...)). Without this runtime check, pre-26 devices will crash.
[Android][Fixed] - Fixes crash on pre-26 Android devices when setting text content type
Reviewed By: lunaleaps
Differential Revision: D14479468
fbshipit-source-id: 238c1efd6aea682a93ecb45e1123aaed6bdcd9e3
Summary: Easy cleanup of commented code in TextLayoutManager, I kept the TODOs to complete the code in the future
Reviewed By: shergin
Differential Revision: D14372356
fbshipit-source-id: ff87f9b09e9f40ed021256f463e39299467b3e0e
Summary:
Signed-off-by: yukai <yk3372@gmail.com>
In some Android device such as Samsung S8, the ModalHostView's child view can't fill the screen.
before:

The JS ModalHostView can't fill the bottom, the area is device's navigation bar.
In class ModalHostShadowNode, follow code calculate is error:
`Point modalSize = ModalHostHelper.getModalHostSize(getThemedContext());`
This way not care the device's navigation bar, so the height is smaller than real.
For Samsung S8, real height is 2220 and modalSize.y is 2076.
Pull Request resolved: https://github.com/facebook/react-native/pull/18615
Differential Revision: D14206830
Pulled By: cpojer
fbshipit-source-id: abe35ce1ab253aa1472d2c798543b515218be445
Summary:
RN offers checkbox component on android: https://facebook.github.io/react-native/docs/checkbox.html
The Checkbox colors for checked and unchecked states cannot be controlled from JS at the moment; this PR adds support for that.
The essence of changing colors for the states is this:
```
ColorStateList cls = new ColorStateList(
new int[][] {
new int[] { -android.R.attr.state_checked }, // unchecked
new int[] { android.R.attr.state_checked } // checked
},
new int[] {
uncheckedColor,
checkedColor
}
);
checkBox.setSupportButtonTintList(cls);
```
Because of this, I did it so that both colors have to provided together in an object. This is similar to [switch](https://facebook.github.io/react-native/docs/switch#trackcolor)
Pull Request resolved: https://github.com/facebook/react-native/pull/18300
Differential Revision: D14180218
Pulled By: cpojer
fbshipit-source-id: 88a9d1faf061c0651e3e28950f697535b90fbfd4
Summary:
Clearing the android TextInput text programmatically (i.e. calling: this.textInputRef.clear()) does not clear the previously composing text, if enabled, causing inconveniences when such behaviour is desired (i.e. chat input box, where you constantly have to clear the input after sending a message). Instead, the currently observed behaviour is that, after a new text is entered (usually as soon as the first letter), the previously composing text reappears making the input unusable.
The effect is only observable on some devices, for example, we observed it on Samsung S6 devices using both Android 6 and 7, and several LG devices running Android 6.
This issue is only present when clearing the text; setting text to some other value does not produce the same effect.
<!--
Required: Write your motivation here.
If this PR fixes an issue, type "Fixes #issueNumber" to automatically close the issue when the PR is merged.
-->
Pull Request resolved: https://github.com/facebook/react-native/pull/18859
Differential Revision: D14067144
Pulled By: hramos
fbshipit-source-id: 09f337edc026b83221f8a399749222cd75457ec7