expo-constants
Advanced tools
Provides system information that remains constant throughout the lifetime of your app.
The expo-constants package provides system information that is useful for building and debugging React Native applications. It includes constants such as the app's manifest, device information, and platform-specific details.
App Constants
This feature allows you to access the app's manifest, which includes information such as the app's name, version, and other metadata.
const Constants = require('expo-constants');
console.log(Constants.manifest);Device Information
This feature provides information about the device, such as the device name, which can be useful for debugging and analytics.
const Constants = require('expo-constants');
console.log(Constants.deviceName);Platform-specific Constants
This feature gives you access to platform-specific constants, such as the operating system and its version, which can help in writing platform-specific code.
const Constants = require('expo-constants');
console.log(Constants.platform);The react-native-device-info package provides device information such as device ID, system name, and system version. It is similar to expo-constants but offers more detailed device-specific information.
The expo-device package offers detailed information about the device, including device model, manufacturer, and total memory. It is more focused on device-specific details compared to expo-constants.
The react-native-config package allows you to manage environment-specific configurations. While it doesn't provide system information like expo-constants, it is useful for managing different configurations for different environments.
Provides system information that remains constant throughout the lifetime of your app.
For managed Expo projects, please follow the installation instructions in the API documentation for the latest stable release.
For bare React Native projects, you must ensure that you have installed and configured the expo package before continuing.
npx expo install expo-constants
In a monorepo, the expo-constants package might be in a different folder than the native scripts are expecting. You can easily symlink the node module to your app's local node_modules folder by doing the following:
expo-yarn-workspaces.package.json:{
"expo-yarn-workspaces": {
"symlinks": ["expo-constants"]
}
}
yarn in the app folder to create symlinks to expo-constants in your app's local node_modules folder.Contributions are very welcome! Please refer to guidelines described in the contributing guide.
FAQs
Provides system information that remains constant throughout the lifetime of your app.
The npm package expo-constants receives a total of 707,124 weekly downloads. As such, expo-constants popularity was classified as popular.
We found that expo-constants demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 32 open source maintainers collaborating on the project.
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