Andrei Calazans

React Native Weekly - W37 & W38 2021

☕️ 4 min read

Welcome to the 26th edition of React Native Weekly!

This is a special edition that contains two weeks: Week 37 and 38. This is everything that happened between the 6th and 19th of September.

Fixed LogBoxData ignorePatterns function

wangqingyang improved the comparison logic of this function that was previously broken. You can use the LogBoxData.addIgnorePatterns to ignore certain logs.

Add LayoutAnimation support to all ViewKind nodes

Samuel Susla explained how the LayoutAnimation only animated changes inside a View and a Paragraph node. His change adds support to any ViewKind now.

What he did was remove the interpolation logic from the ParagraphComponentDescriptor and ViewComponentDescriptor then add it to the ConcreteComponentDescriptor which is the base class for any descriptor or node.

Samuel Susla also introduced improvements to the LayoutAnimation code. He simplified (1) , organized (2), and improved the C++ code (3).

There were quite a few commits by Samuel which I am not linking here, it impresses me how productive Samuel is.

NativeModule Initialization Improvements

Ramanpreet Nara made improvements to the Native Module initialization logic. It is a bit beyond my understanding and I didn’t have the time to properly dig through yet. From what I understood Ramanpreet found some deadlocking code due to the recursive initialization of some modules. He thus moved the initialization logic outside the setModuleRegistry to avoid this.

This is all relevant for the Bridgeless mode AKA Fabric since Native Module initialization is now owned by each module through the “initialize” method introduced in RCTInitializing.

Ramanpreet Nara says:

“In general, we shouldn’t do any sort of initialization inside setters for these bridge/bridgeless APIs. No other NativeModules do initialization outside of initialize.”

Use Updated Android Locale API

Change by Aaron Grider

Summary: This change migrates fetching locale information from the deprecated Android locale api to the new locale api on sdk version 30+. The old api was deprecated some time ago and should not be used.

Test Plan:

if (Platform.OS === 'android') {
  locale = NativeModules.I18nManager.localeIdentifier; // returns ex. 'EN_us'

Fix missing WebView provider crash in ForwardingCookieHandler [Android]

Rodolfo explained how this was a regression introduced in 0.62.2. His app had ~0.1% of the users impacted on Android.


Fix BorderExample Crash on Out of Tree Platforms

This is a simple change for the RnTester, putting it here so you can see the usage of with PlatformColor.

diff --git a/packages/rn-tester/js/examples/Border/BorderExample.js b/packages/rn-tester/js/examples/Border/BorderExample.js
index 1c256df9aba..34a4db8b16c 100644
--- a/packages/rn-tester/js/examples/Border/BorderExample.js
+++ b/packages/rn-tester/js/examples/Border/BorderExample.js
@@ -183,10 +183,12 @@ const styles = StyleSheet.create({
   border15: {
     borderWidth: 10,
-    borderColor: PlatformColor(
-      'systemGray4',
-      '@android:color/holo_orange_dark',
-    ),
+    borderColor:{
+      ios: PlatformColor('systemGray4'),
+      android: PlatformColor('@android:color/holo_orange_dark'),
+      windows: PlatformColor('SystemAccentColorDark1'),
+      default: 'black',
+    }),

Set “new task flag” for intent method Android

Krzysztof Borowy fixed the crash caused when calling Linking.sendIntent on Android.

+    sendOSIntent(intent, true);
+  }
+  private void sendOSIntent(Intent intent, Boolean useNewTaskFlag) {
+    Activity currentActivity = getCurrentActivity();
+    String selfPackageName = getReactApplicationContext().getPackageName();
+    ComponentName componentName =
+        intent.resolveActivity(getReactApplicationContext().getPackageManager());
+    String otherPackageName = (componentName != null ? componentName.getPackageName() : "");
+    // If there is no currentActivity or we are launching to a different package we need to set
+    // the FLAG_ACTIVITY_NEW_TASK flag
+    if (useNewTaskFlag || currentActivity == null || !selfPackageName.equals(otherPackageName)) {
+      intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+    }
+    if (currentActivity != null) {
+      currentActivity.startActivity(intent);
+    } else {
+      getReactApplicationContext().startActivity(intent);
+    }

Use Gradle Lazy API

Nicola Corti introduced updates to the Gradle plugin to use the Gradle Lazy API. He notes that this is a breaking change for users that are testing their Gradle Plugin and for Gradle Kotlin DSL users.

Do not flatten view if prop accessibilityViewIsModal is true

With this views are no longer flatten if accessibility view is a modal.

Use Fabric by default in RNTester

Héctor Ramos enabled Fabric by default for the rn-tester app for iOS.

Fix NSInvalidArgumentException for Invalid Font Family Name

Tim Yung explained how in certain production scenarios [UIFont fontNamesForFamilyName:familyName] returns nil and it caused an issue when trying to insert nil into NSCache since it is an object type.

He fixes this by guarding against nil.

Pass accessibilityHint through Button component

This commit ensures accessibilityHint is passed down to the Button component.



That’s it for this week. If you want to see more checkout the previous week’s posts here. Subscribe to get notified when new posts are out = )