feat(iOS): Enable synchronous header config shadow state updates by default#3932
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kmichalikk merged 3 commits intomainfrom Apr 28, 2026
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Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
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Pull request overview
This PR flips the default for the experimental synchronousHeaderConfigUpdatesEnabled feature flag to true, enabling synchronous shadow state updates for stack header config on iOS by default (aligning JS, codegen defaults, and the native initial state).
Changes:
- Set the JS feature flag default
synchronousHeaderConfigUpdatesEnabledtotrue. - Update the Fabric codegen default for
synchronousShadowStateUpdatesEnabledonRNSScreenStackHeaderConfigtotrue. - Initialize the iOS native header config’s
_synchronousShadowStateUpdatesEnabledtoYESby default, and update the Fabric example flag totrue.
Reviewed changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
src/flags.ts |
Changes the JS default for synchronousHeaderConfigUpdatesEnabled to true. |
src/fabric/ScreenStackHeaderConfigNativeComponent.ts |
Updates the codegen default for synchronousShadowStateUpdatesEnabled to true. |
ios/RNSScreenStackHeaderConfig.mm |
Sets the native initial default _synchronousShadowStateUpdatesEnabled to YES. |
FabricExample/App.tsx |
Enables the flag in the Fabric example configuration. |
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t0maboro
approved these changes
Apr 24, 2026
kkafar
approved these changes
Apr 27, 2026
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Description
This PR changes the default value for
synchronousHeaderConfigUpdatesEnabledflag to true.Changes
Updated flag default, native and JS defaults
Before & after - visual documentation
N/A
Test plan
See #3282
Checklist