expo-constants
Provides system information that remains constant throughout the lifetime of your app.
API documentation
Installation in managed Expo projects
For managed managed Expo projects, please follow the installation instructions in the API documentation for the latest stable release.
Installation in bare React Native projects
For bare React Native projects, you must ensure that you have installed and configured the react-native-unimodules package before continuing.
Add the package to your npm dependencies
expo install expo-constants
Optional: set up script to get app config
Optionally, you can set up a build script that will grab your app's config (from app.json or app.config.js) and embed it into your build. This will ensure Constants.manifest is defined on the first run of your app (before it has downloaded any OTA updates). If your app doesn't use Constants.manifest, you can skip this step.
To set up the script on iOS, add the following line to the Bundle React Native code and images Build Phase in your Xcode project:
../node_modules/expo-constants/scripts/get-app-config-ios.sh
To set up the script on Android, apply the following diff to android/app/build.gradle:
apply from: "../../node_modules/react-native/react.gradle"
+apply from: "../../node_modules/expo-constants/scripts/get-app-config-android.gradle"
Contributing
Contributions are very welcome! Please refer to guidelines described in the contributing guide.