ScreenCornerRadius crashes at import on iOS simulator: "Cannot read property 'cornerRadius' of null"

[blazejkustra]

Summary

Importing ScreenCornerRadius crashes the app on the iOS simulator with:

TypeError: Cannot read property 'cornerRadius' of null

The crash happens at module-load time, so it takes down the whole app rather than degrading gracefully.

Root cause

In src/index.tsx:

export const ScreenCornerRadius =
  NativeModules.ScreenCornerRadius.cornerRadius ?? 0;

The ?? 0 only guards .cornerRadius being null/undefined — it does not guard NativeModules.ScreenCornerRadius itself being null. When the native module isn't available (iOS simulator, or module not registered), NativeModules.ScreenCornerRadius is null, so accessing .cornerRadius throws before the ?? 0 fallback can apply.

Steps to reproduce

1. Add react-native-screen-corner-radius to an app.
2. import { ScreenCornerRadius } from 'react-native-screen-corner-radius'.
3. Run on an iOS simulator.
4. App crashes on load.

Expected behavior

When the native module is unavailable, ScreenCornerRadius should fall back to 0 (and IsScreenRounded to false) rather than throwing.

Suggested fix

Optional-chain the module access too:

export const ScreenCornerRadius =
  NativeModules.ScreenCornerRadius?.cornerRadius ?? 0;

Environment

• react-native-screen-corner-radius: 0.2.3
• react-native: 0.83.2
• Platform: iOS simulator

[blazejkustra]

@mrousavy Created a PR, mind releasing it?