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On web (browser/Electron), expo-crypto's randomUUID() and getRandomValues() just forward to globalThis.crypto.* (see expo-crypto/src/ExpoCrypto.web.ts). The previous polyfill installed `g.crypto.randomUUID = () => ExpoCrypto.randomUUID()`, which on web reads back through the same `globalThis.crypto.randomUUID` it just installed, recursing until the stack overflows. The same trap exists for getRandomValues, but it rarely triggers because the native version is almost always present. Capture a bound reference to the native getRandomValues *before* installing the polyfill, and generate UUID v4 in JS from 16 random bytes (RFC 4122 version + variant bits). The fallback path stays on ExpoCrypto.getRandomValues (non-recursive on native), and ExpoCrypto.randomUUID is no longer used.
Welcome to your Expo app 👋
This is an Expo project created with create-expo-app.
Get started
-
Install dependencies
npm install -
Start the app
npx expo start
In the output, you'll find options to open the app in a
- development build
- Android emulator
- iOS simulator
- Expo Go, a limited sandbox for trying out app development with Expo
You can start developing by editing the files inside the app directory. This project uses file-based routing.
Get a fresh project
When you're ready, run:
npm run reset-project
This command will move the starter code to the app-example directory and create a blank app directory where you can start developing.
Learn more
To learn more about developing your project with Expo, look at the following resources:
- Expo documentation: Learn fundamentals, or go into advanced topics with our guides.
- Learn Expo tutorial: Follow a step-by-step tutorial where you'll create a project that runs on Android, iOS, and the web.
Join the community
Join our community of developers creating universal apps.
- Expo on GitHub: View our open source platform and contribute.
- Discord community: Chat with Expo users and ask questions.
Dictation debugging
Set EXPO_PUBLIC_ENABLE_AUDIO_DEBUG=1 before running npx expo start to render the in-app audio debug card. Pair it with the server-side STT_DEBUG_AUDIO_DIR flag so every dictation includes a copyable path to the saved raw audio file.