Try react-native-webassembly

[JunichiSugiura]

No description provided.

[claude]

Claude finished @JunichiSugiura's task —— View job

---

Code Review Complete ✅

Successfully reviewed this React Native WebAssembly integration PR and provided comprehensive feedback through the GitHub review system.

Todo List:

• Check existing reviews and comments
• Create pending review
• Get PR diff and analyze changes
• Review WebAssembly integration implementation
• Check React Native/Expo best practices
• Add inline comments for specific issues
• Submit comprehensive review

Key Findings:

• Critical issue: Error handling throws exception preventing UI error display
• Performance concern: WASM fetched from network on every mount without caching
• Type safety: Hardcoded parameters with non-descriptive names
• Missing features: No loading states or user feedback during initialization
• Dependency concern: Added axios just for WASM fetching (could use fetch instead)

Recommendations:

• Bundle WASM locally for better performance
• Fix error handling to show errors to users
• Add proper TypeScript interfaces for WASM exports
• Implement loading states and error recovery
• Consider removing axios dependency

The review has been submitted as a non-blocking COMMENT to allow the PR to proceed while addressing the feedback.

---

[claude]

WebAssembly Integration Review

This PR adds WebAssembly support to the React Native app using react-native-webassembly. Here's my analysis:

✅ Positive Changes

• Clean integration of react-native-webassembly plugin
• Proper Expo plugin configuration
• Good error handling structure with user-facing error display
• Appropriate use of useEffect for initialization
• TypeScript interface definition for WASM exports

⚠️ Issues & Recommendations

Critical - Error Handling (app/wasm.tsx:30)

} catch (err) {
  console.error('Error fetching WASM:', err);
  setError(err instanceof Error ? err.message : 'Unknown error');
  throw err; // ❌ This prevents UI from showing the error
}

Fix: Remove the throw err; line to allow the UI to display the error message.

Performance - Network Request on Every Mount (app/wasm.tsx:16-35)

• WASM file is fetched from GitHub on every component mount
• No caching mechanism implemented
• Could cause unnecessary network requests and poor UX

Recommended approach:

1. Bundle WASM locally in assets (as suggested in comments)
2. Or implement proper caching with AsyncStorage
3. Add loading state management

Type Safety - Hardcoded Parameters (app/wasm.tsx:23-25)

cartridgeaccount_new: (a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number, k: number, l: number, m: number) => void;

• Parameter names are not descriptive (a, b, c, etc.)
• Should use proper TypeScript interfaces for WASM bindings

UI/UX - Missing Loading State

• No loading indicator while fetching WASM
• User has no feedback during initialization

Dependencies

• Adding axios just for WASM fetching seems excessive
• Could use native fetch API instead
• Consider if react-native-webassembly@0.3.3 is production-ready

🚀 Suggestions for Improvement

1. Bundle WASM locally as suggested in the comments
2. Add proper loading states and user feedback
3. Implement proper TypeScript interfaces for WASM exports
4. Consider removing axios dependency in favor of fetch
5. Add error recovery mechanisms (retry logic, fallbacks)
6. Add unit tests for WASM integration
7. Document WASM module functionality and expected parameters

📋 Platform Compatibility

The react-native-webassembly library should work across iOS, Android, and Web, which aligns well with this UI library's cross-platform goals.

Overall, this is a good start for WebAssembly integration, but needs refinement for production use, particularly around error handling and performance optimizations.