expo-environments

When to Use

• Setting up a new Expo project with multiple environments
• Configuring environment variables for dev, staging, production
• Creating EAS Build profiles for different environments
• Need different app identifiers/names per environment
• Managing API URLs, feature flags, or service keys per environment

Critical Patterns

1. Environment Variable Naming

All client-accessible variables MUST use EXPO_PUBLIC_ prefix:

# Correct - accessible in app code
EXPO_PUBLIC_API_URL=https://api.example.com
EXPO_PUBLIC_FIREBASE_API_KEY=xxx