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A reference of available properties in Expo app config.
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The following is a list of properties that are available for you under the "expo" key in app.json or app.config.json. These properties can be passed to the top level object of app.config.js or app.config.ts.
For more general information on app configuration, such as the differences between the various app configuration files, see Configuration with app.json/app.config.js.
Type: string
The name of your app as it appears both within Expo Go and on your home screen as a standalone app.
Type: string
The name of the Expo account that owns the project. This is useful for teams collaborating on a project. If not provided, the owner defaults to the username of the current user.
Type: string
The auto generated Expo account name and slug used for display purposes. It is not meant to be set directly. Formatted like @username/slug. When unauthenticated, the username is @anonymous. For published projects, this value may change when a project is transferred between accounts or renamed.
Type: string
The auto generated Expo account name and slug used for services like Notifications and AuthSession proxy. It is not meant to be set directly. Formatted like @username/slug. When unauthenticated, the username is @anonymous. For published projects, this value will not change when a project is transferred between accounts or renamed.
Type: enum
Defaults to unlisted. unlisted hides the project from search results. hidden restricts access to the project page to only the owner and other users that have been granted access. Valid values: public, unlisted, hidden.
Type: string
The Expo sdkVersion to run the project on. This should line up with the version specified in your package.json.
One of types: {
"type": "string",
"pattern": "^[a-zA-Z\\d][a-zA-Z\\d._+()-]{0,254}$"
}{
"type": "string",
"pattern": "^exposdk:((\\d+\\.\\d+\\.\\d+)|(UNVERSIONED))$"
}{
"type": "object",
"properties": {
"policy": {
"type": "string",
"enum": [
"nativeVersion",
"sdkVersion",
"appVersion",
"fingerprint"
]
}
},
"required": [
"policy"
]
}
Property indicating compatibility between a build's native code and an OTA update.
Type: string
Your app version. In addition to this field, you'll also use ios.buildNumber and android.versionCode — read more about how to version your app here. On iOS this corresponds to CFBundleShortVersionString, and on Android, this corresponds to versionName. The required format can be found here.
Type: array
Platforms that your project explicitly supports. If not specified, it defaults to ["ios", "android"].
Example
[
"ios",
"android",
"web"
]Type: string
If you would like to share the source code of your app on Github, enter the URL for the repository here and it will be linked to from your Expo project page.
Example
"https://github.com/expo/expo"Type: enum
Locks your app to a specific orientation with portrait or landscape. Defaults to no lock. Valid values: default, portrait, landscape
Type: enum
Configuration to force the app to always use the light or dark user-interface appearance, such as "dark mode", or make it automatically adapt to the system preferences. If not provided, defaults to light. Requires expo-system-ui be installed in your project to work on Android.
Type: string
The background color for your app, behind any of your React views. This is also known as the root view background color. Requires expo-system-ui be installed in your project to work on iOS.
6 character long hex color string, for example, '#000000'. Default is white: '#ffffff'
Type: string
On Android, this will determine the color of your app in the multitasker. Currently this is not used on iOS, but it may be used for other purposes in the future.
6 character long hex color string, for example, '#000000'
Type: string
Local path or remote URL to an image to use for your app's icon. We recommend that you use a 1024x1024 png file. This icon will appear on the home screen and within the Expo app.
To change your app's icon, edit or replace the files in ios/<PROJECT-NAME>/Assets.xcassets/AppIcon.appiconset (we recommend using Xcode), and android/app/src/main/res/mipmap-<RESOLUTION>. Be sure to follow the guidelines for each platform (iOS, Android 7.1 and below, and Android 8+) and to provide your new icon in each existing size.
Type: object
Configuration for remote (push) notifications.
Type: string • Path: notification.icon
(Android only) Local path or remote URL to an image to use as the icon for push notifications. 96x96 png grayscale with transparency. We recommend following Google's design guidelines. If not provided, defaults to your app icon.
Type: string • Path: notification.color
(Android only) Tint color for the push notification image when it appears in the notification tray. Defaults to #ffffff
6 character long hex color string, for example, '#000000'
Type: boolean • Path: notification.iosDisplayInForeground
Whether or not to display notifications when the app is in the foreground on iOS. _displayInForeground option in the individual push notification message overrides this option. Learn more. Defaults to false.
Type: enum • Path: notification.androidMode
Show each push notification individually (default) or collapse into one (collapse).
Type: string • Path: notification.androidCollapsedTitle
If androidMode is set to collapse, this title is used for the collapsed notification message. For example, '#{unread_notifications} new interactions'.
Type: object
Configuration for the status bar on Android. For more details please navigate to Configuring StatusBar.
Type: enum • Path: androidStatusBar.barStyle
Configures the status bar icons to have a light or dark color. Valid values: light-content, dark-content. Defaults to dark-content
Type: string • Path: androidStatusBar.backgroundColor
Specifies the background color of the status bar. Defaults to #00000000 (transparent) for dark-content bar style and #00000088 (semi-transparent black) for light-content bar style
6 character long hex color string '#RRGGBB', for example, '#000000' for black. Or 8 character long hex color string '#RRGGBBAA', for example, '#00000088' for semi-transparent black.
Type: boolean • Path: androidStatusBar.hidden
Instructs the system whether the status bar should be visible or not. Defaults to false
Type: boolean • Path: androidStatusBar.translucent
When false, the system status bar pushes the content of your app down (similar to position: relative). When true, the status bar floats above the content in your app (similar to position: absolute). Defaults to true to match the iOS status bar behavior (which can only float above content). Explicitly setting this property to true will add android:windowTranslucentStatus to styles.xml and may cause unexpected keyboard behavior on Android when using the softwareKeyboardLayoutMode set to resize. In this case you will have to use KeyboardAvoidingView to manage the keyboard layout.
Type: object
Configuration for the bottom navigation bar on Android. Can be used to configure the expo-navigation-bar module in EAS Build.
Type: enum • Path: androidNavigationBar.visible
Determines how and when the navigation bar is shown. Learn more. Requires expo-navigation-bar be installed in your project. Valid values: leanback, immersive, sticky-immersive
leanback results in the navigation bar being hidden until the first touch gesture is registered.
immersive results in the navigation bar being hidden until the user swipes up from the edge where the navigation bar is hidden.
sticky-immersive is identical to 'immersive' except that the navigation bar will be semi-transparent and will be hidden again after a short period of time.
Type: enum • Path: androidNavigationBar.barStyle
Configure the navigation bar icons to have a light or dark color. Supported on Android Oreo and newer. Valid values: 'light-content', 'dark-content'
Type: string • Path: androidNavigationBar.backgroundColor
Specifies the background color of the navigation bar.
6 character long hex color string, for example, '#000000'
Type: object
Settings that apply specifically to running this app in a development client
Type: boolean • Path: developmentClient.silentLaunch
If true, the app will launch in a development client with no additional dialogs or progress indicators, just like in a standalone app.
One of types: {
"type": "string",
"pattern": "^[a-z][a-z0-9+.-]*$"
}{
"type": "array",
"items": {
"type": "string",
"pattern": "^[a-z][a-z0-9+.-]*$"
}
}
URL scheme(s) to link into your app. For example, if we set this to 'demo', then demo:// URLs would open your app when tapped. This is a build-time configuration, it has no effect in Expo Go.
String beginning with a lowercase letter followed by any combination of lowercase letters, digits, "+", "." or "-"
Type: object
Any extra fields you want to pass to your experience. Values are accessible via Constants.expoConfig.extra (Learn more)
Type: object
Configuration for the expo-updates library
Type: boolean • Path: updates.enabled
Whether the updates system will run. Defaults to true. If set to false, builds will only use code and assets bundled at time of build.
Type: enum • Path: updates.checkAutomatically
By default, expo-updates will check for updates every time the app is loaded. Set this to ON_ERROR_RECOVERY to disable automatic checking unless recovering from an error. Set this to NEVER to disable automatic checking. Valid values: ON_LOAD (default value), ON_ERROR_RECOVERY, WIFI_ONLY, NEVER
Type: number • Path: updates.fallbackToCacheTimeout
How long (in ms) to wait for the app to check for and fetch a new update upon launch before falling back to the most recent update already present on the device. Defaults to 0. Must be between 0 and 300000 (5 minutes). If the startup update check takes longer than this value, any update downloaded during the check will be applied upon the next app launch.
Type: string • Path: updates.codeSigningCertificate
Local path of a PEM-formatted X.509 certificate used for verifying codesigned updates. When provided, all updates downloaded by expo-updates must be signed.
Type: object • Path: updates.codeSigningMetadata
Metadata for codeSigningCertificate
Type: enum • Path: updates.codeSigningMetadata.alg
Algorithm used to generate manifest code signing signature. Valid values: rsa-v1_5-sha256
Type: string • Path: updates.codeSigningMetadata.keyid
Identifier for the key in the certificate. Used to instruct signing mechanisms when signing or verifying signatures.
Type: object • Path: updates.requestHeaders
Extra HTTP headers to include in HTTP requests made by expo-updates when fetching manifests or assets. These may override preset headers.
Type: object
Provide overrides by locale for System Dialog prompts like Permissions Boxes
Type: array
Config plugins for adding extra functionality to your project. Learn more.
Plugins that add modifications can only be used with prebuilding and managed EAS Build
Type: object
Configuration for loading and splash screen for standalone apps.
To change your app's icon, edit or replace the files in ios/<PROJECT-NAME>/Assets.xcassets/AppIcon.appiconset (we recommend using Xcode), and android/app/src/main/res/mipmap-<RESOLUTION> (Android Studio can generate the appropriate image files for you). Be sure to follow the guidelines for each platform (iOS, Android 7.1 and below, and Android 8+) and to provide your new icon in each required size.
Type: string • Path: splash.backgroundColor
Color to fill the loading screen background
6 character long hex color string, for example, '#000000'
Type: enum • Path: splash.resizeMode
Determines how the image will be displayed in the splash loading screen. Must be one of cover or contain, defaults to contain.
Type: string • Path: splash.image
Local path or remote URL to an image to fill the background of the loading screen. Image size and aspect ratio are up to you. Must be a .png.
Type: enum
Specifies the JavaScript engine for apps. Supported only on EAS Build. Defaults to hermes. Valid values: hermes, jsc.
Type: object
Configuration that is specific to the iOS platform.
Type: string • Path: ios.publishManifestPath
The manifest for the iOS version of your app will be written to this path during publish.
Type: string • Path: ios.publishBundlePath
The bundle for the iOS version of your app will be written to this path during publish.
Type: string • Path: ios.bundleIdentifier
The bundle identifier for your iOS standalone app. You make it up, but it needs to be unique on the App Store. See this StackOverflow question.
iOS bundle identifier notation unique name for your app. For example, host.exp.expo, where exp.host is our domain and expo is our app name.
Type: string • Path: ios.buildNumber
Build number for your iOS standalone app. Corresponds to CFBundleVersion and must match Apple's specified format. (Note: Transporter will pull the value for Version Number from expo.version and NOT from expo.ios.buildNumber.)
Type: string • Path: ios.backgroundColor
The background color for your iOS app, behind any of your React views. Overrides the top-level backgroundColor key if it is present. Requires expo-system-ui be installed in your project to work on iOS.
6 character long hex color string, for example, '#000000'
Type: string • Path: ios.icon
Local path or remote URL to an image to use for your app's icon on iOS. If specified, this overrides the top-level icon key. Use a 1024x1024 icon which follows Apple's interface guidelines for icons, including color profile and transparency.
Expo will generate the other required sizes. This icon will appear on the home screen and within the Expo app.
Type: string • Path: ios.appStoreUrl
URL to your app on the Apple App Store, if you have deployed it there. This is used to link to your store page from your Expo project page if your app is public.
Example
"https://apps.apple.com/us/app/expo-client/id982107779"Type: undefined • Path: ios.bitcode
Enable iOS Bitcode optimizations in the native build. Accepts the name of an iOS build configuration to enable for a single configuration and disable for all others, e.g. Debug, Release. Not available in Expo Go. Defaults to undefined which uses the template's predefined settings.
Type: object • Path: ios.config
Note: This property key is not included in the production manifest and will evaluate to undefined. It is used internally only in the build process, because it contains API keys that some may want to keep private.
Type: object • Path: ios.config.branch
Branch key to hook up Branch linking services.
Type: boolean • Path: ios.config.usesNonExemptEncryption
Sets ITSAppUsesNonExemptEncryption in the standalone ipa's Info.plist to the given boolean value.
Type: string • Path: ios.config.googleMapsApiKey
Google Maps iOS SDK key for your standalone app.
Type: string • Path: ios.config.googleMobileAdsAppId
Google Mobile Ads App ID Google AdMob App ID.
Type: boolean • Path: ios.config.googleMobileAdsAutoInit
A boolean indicating whether to initialize Google App Measurement and begin sending user-level event data to Google immediately when the app starts. The default in Expo (Go and in standalone apps) is false. Sets the opposite of the given value to the following key in Info.plist.
Type: string • Path: ios.googleServicesFile
Firebase Configuration File Location of the GoogleService-Info.plist file for configuring Firebase.
Type: boolean • Path: ios.supportsTablet
Whether your standalone iOS app supports tablet screen sizes. Defaults to false.
Type: boolean • Path: ios.isTabletOnly
If true, indicates that your standalone iOS app does not support handsets, and only supports tablets.
Type: boolean • Path: ios.requireFullScreen
If true, indicates that your standalone iOS app does not support Slide Over and Split View on iPad. Defaults to false
Type: enum • Path: ios.userInterfaceStyle
Configuration to force the app to always use the light or dark user-interface appearance, such as "dark mode", or make it automatically adapt to the system preferences. If not provided, defaults to light.
Type: object • Path: ios.infoPlist
Dictionary of arbitrary configuration to add to your standalone app's native Info.plist. Applied prior to all other Expo-specific configuration. No other validation is performed, so use this at your own risk of rejection from the App Store.
Type: object • Path: ios.entitlements
Dictionary of arbitrary configuration to add to your standalone app's native *.entitlements (plist). Applied prior to all other Expo-specific configuration. No other validation is performed, so use this at your own risk of rejection from the App Store.
Type: object • Path: ios.privacyManifests
Dictionary of privacy manifest definitions to add to your app's native PrivacyInfo.xcprivacy file. Learn more
Type: array • Path: ios.privacyManifests.NSPrivacyAccessedAPITypes
A list of required reasons of why your app uses restricted API categories. Learn more
Type: string • Path: ios.privacyManifests.NSPrivacyAccessedAPITypes.NSPrivacyAccessedAPIType
A string that identifies the category of required reason APIs your app uses
NSPrivacyAccessedAPITypeReasons
Type: array • Path: ios.privacyManifests.NSPrivacyAccessedAPITypes.NSPrivacyAccessedAPITypeReasons
A list of reasons for a specific category.
Type: array • Path: ios.privacyManifests.NSPrivacyTrackingDomains
A list of domains that your app uses for tracking.
Type: boolean • Path: ios.privacyManifests.NSPrivacyTracking
A Boolean that indicates whether your app or third-party SDK uses data for tracking.
Type: array • Path: ios.privacyManifests.NSPrivacyCollectedDataTypes
A list of collected data types that your app uses.
Type: string • Path: ios.privacyManifests.NSPrivacyCollectedDataTypes.NSPrivacyCollectedDataType
NSPrivacyCollectedDataTypeLinked
Type: boolean • Path: ios.privacyManifests.NSPrivacyCollectedDataTypes.NSPrivacyCollectedDataTypeLinked
NSPrivacyCollectedDataTypeTracking
Type: boolean • Path: ios.privacyManifests.NSPrivacyCollectedDataTypes.NSPrivacyCollectedDataTypeTracking
NSPrivacyCollectedDataTypePurposes
Type: array • Path: ios.privacyManifests.NSPrivacyCollectedDataTypes.NSPrivacyCollectedDataTypePurposes
Type: array • Path: ios.associatedDomains
An array that contains Associated Domains for the standalone app. Learn more.
Entries must follow the format applinks:<fully qualified domain>[:port number]. Learn more.
Build with EAS, or use Xcode to enable this capability manually. Learn more.
Type: boolean • Path: ios.usesIcloudStorage
A boolean indicating if the app uses iCloud Storage for DocumentPicker. See DocumentPicker docs for details.
Type: boolean • Path: ios.usesAppleSignIn
A boolean indicating if the app uses Apple Sign-In. See AppleAuthentication docs for details.
Type: boolean • Path: ios.accessesContactNotes
A Boolean value that indicates whether the app may access the notes stored in contacts. You must receive permission from Apple before you can submit your app for review with this capability.
Type: object • Path: ios.splash
Configuration for loading and splash screen for standalone iOS apps.
Type: string • Path: ios.splash.backgroundColor
Color to fill the loading screen background
6 character long hex color string, for example, '#000000'
Type: enum • Path: ios.splash.resizeMode
Determines how the image will be displayed in the splash loading screen. Must be one of cover or contain, defaults to contain.
Type: string • Path: ios.splash.image
Local path or remote URL to an image to fill the background of the loading screen. Image size and aspect ratio are up to you. Must be a .png.
Type: string • Path: ios.splash.tabletImage
Local path or remote URL to an image to fill the background of the loading screen. Image size and aspect ratio are up to you. Must be a .png.
Type: object • Path: ios.splash.dark
Configuration for loading and splash screen for standalone iOS apps in dark mode.
Type: string • Path: ios.splash.dark.backgroundColor
Color to fill the loading screen background
6 character long hex color string, for example, '#000000'
Type: enum • Path: ios.splash.dark.resizeMode
Determines how the image will be displayed in the splash loading screen. Must be one of cover or contain, defaults to contain.
Type: string • Path: ios.splash.dark.image
Local path or remote URL to an image to fill the background of the loading screen. Image size and aspect ratio are up to you. Must be a .png.
Type: string • Path: ios.splash.dark.tabletImage
Local path or remote URL to an image to fill the background of the loading screen. Image size and aspect ratio are up to you. Must be a .png.
Type: enum • Path: ios.jsEngine
Specifies the JavaScript engine for iOS apps. Supported only on EAS Build. Defaults to hermes. Valid values: hermes, jsc.
One of types: {
"type": "string",
"pattern": "^[a-zA-Z\\d][a-zA-Z\\d._+()-]{0,254}$"
}{
"type": "string",
"pattern": "^exposdk:((\\d+\\.\\d+\\.\\d+)|(UNVERSIONED))$"
}{
"type": "object",
"properties": {
"policy": {
"type": "string",
"enum": [
"nativeVersion",
"sdkVersion",
"appVersion",
"fingerprint"
]
}
},
"required": [
"policy"
]
} • Path: ios.runtimeVersion
Property indicating compatibility between an iOS build's native code and an OTA update for the iOS platform. If provided, this will override the value of the top level runtimeVersion key on iOS.
Type: object
Configuration that is specific to the Android platform.
Type: string • Path: android.publishManifestPath
The manifest for the Android version of your app will be written to this path during publish.
Type: string • Path: android.publishBundlePath
The bundle for the Android version of your app will be written to this path during publish.
Type: string • Path: android.package
The package name for your Android standalone app. You make it up, but it needs to be unique on the Play Store. See this StackOverflow question.
Reverse DNS notation unique name for your app. Valid Android Application ID. For example, com.example.app, where com.example is our domain and app is our app. The name may only contain lowercase and uppercase letters (a-z, A-Z), numbers (0-9) and underscores (_), separated by periods (.). Each component of the name should start with a lowercase letter.
Type: integer • Path: android.versionCode
Version number required by Google Play. Increment by one for each release. Must be a positive integer. Learn more
Type: string • Path: android.backgroundColor
The background color for your Android app, behind any of your React views. Overrides the top-level backgroundColor key if it is present.
6 character long hex color string, for example, '#000000'
Type: enum • Path: android.userInterfaceStyle
Configuration to force the app to always use the light or dark user-interface appearance, such as "dark mode", or make it automatically adapt to the system preferences. If not provided, defaults to light. Requires expo-system-ui be installed in your project to work on Android.
Type: string • Path: android.icon
Local path or remote URL to an image to use for your app's icon on Android. If specified, this overrides the top-level icon key. We recommend that you use a 1024x1024 png file (transparency is recommended for the Google Play Store). This icon will appear on the home screen and within the Expo app.
Type: object • Path: android.adaptiveIcon
Settings for an Adaptive Launcher Icon on Android. Learn more
Type: string • Path: android.adaptiveIcon.foregroundImage
Local path or remote URL to an image to use for your app's icon on Android. If specified, this overrides the top-level icon and the android.icon keys. Should follow the specified guidelines. This icon will appear on the home screen.
Type: string • Path: android.adaptiveIcon.monochromeImage
Local path or remote URL to an image representing the Android 13+ monochromatic icon. Should follow the specified guidelines. This icon will appear on the home screen when the user enables 'Themed icons' in system settings on a device running Android 13+.
Type: string • Path: android.adaptiveIcon.backgroundImage
Local path or remote URL to a background image for your app's Adaptive Icon on Android. If specified, this overrides the backgroundColor key. Must have the same dimensions as foregroundImage, and has no effect if foregroundImage is not specified. Should follow the specified guidelines.
Type: string • Path: android.adaptiveIcon.backgroundColor
Color to use as the background for your app's Adaptive Icon on Android. Defaults to white, #FFFFFF. Has no effect if foregroundImage is not specified.
6 character long hex color string, for example, '#000000'
Type: string • Path: android.playStoreUrl
URL to your app on the Google Play Store, if you have deployed it there. This is used to link to your store page from your Expo project page if your app is public.
Example
"https://play.google.com/store/apps/details?id=host.exp.exponent"Type: array • Path: android.permissions
A list of permissions to add to the app AndroidManifest.xml during prebuild. For example: ['android.permission.SCHEDULE_EXACT_ALARM']
To change the permissions your app requests, edit AndroidManifest.xml directly. To prevent your app from requesting specific permissions (which may automatically be added through an installed native package), add those permissions to AndroidManifest.xml along with a tools:node="remove" tag.
Type: array • Path: android.blockedPermissions
List of permissions to block in the final AndroidManifest.xml. This is useful for removing permissions that are added by native package AndroidManifest.xml files which are merged into the final manifest. Internally this feature uses the tools:node="remove" XML attribute to remove permissions. Not available in Expo Go.
Type: string • Path: android.googleServicesFile
Firebase Configuration File Location of the google-services.json file for configuring Firebase. Including this key automatically enables FCM in your standalone app.
Type: object • Path: android.config
Note: This property key is not included in the production manifest and will evaluate to undefined. It is used internally only in the build process, because it contains API keys that some may want to keep private.
Type: object • Path: android.config.branch
Branch key to hook up Branch linking services.
Type: object • Path: android.config.googleMaps
Google Maps Android SDK configuration for your standalone app.
Type: string • Path: android.config.googleMobileAdsAppId
Google Mobile Ads App ID Google AdMob App ID.
Type: boolean • Path: android.config.googleMobileAdsAutoInit
A boolean indicating whether to initialize Google App Measurement and begin sending user-level event data to Google immediately when the app starts. The default in Expo (Client and in standalone apps) is false. Sets the opposite of the given value to the following key in Info.plist
Type: object • Path: android.splash
Configuration for loading and splash screen for managed and standalone Android apps.
Type: string • Path: android.splash.backgroundColor
Color to fill the loading screen background
6 character long hex color string, for example, '#000000'
Type: enum • Path: android.splash.resizeMode
Determines how the image will be displayed in the splash loading screen. Must be one of cover, contain or native, defaults to contain.
Type: string • Path: android.splash.image
Local path or remote URL to an image to fill the background of the loading screen. Image size and aspect ratio are up to you. Must be a .png.
Type: string • Path: android.splash.mdpi
Local path or remote URL to an image to fill the background of the loading screen in "native" mode. Image size and aspect ratio are up to you. Learn more
Natural sized image (baseline)
Type: string • Path: android.splash.hdpi
Local path or remote URL to an image to fill the background of the loading screen in "native" mode. Image size and aspect ratio are up to you. Learn more
Scale 1.5x
Type: string • Path: android.splash.xhdpi
Local path or remote URL to an image to fill the background of the loading screen in "native" mode. Image size and aspect ratio are up to you. Learn more
Scale 2x
Type: string • Path: android.splash.xxhdpi
Local path or remote URL to an image to fill the background of the loading screen in "native" mode. Image size and aspect ratio are up to you. Learn more
Scale 3x
Type: string • Path: android.splash.xxxhdpi
Local path or remote URL to an image to fill the background of the loading screen in "native" mode. Image size and aspect ratio are up to you. Learn more
Scale 4x
Type: object • Path: android.splash.dark
Configuration for loading and splash screen for managed and standalone Android apps in dark mode.
Type: string • Path: android.splash.dark.backgroundColor
Color to fill the loading screen background
6 character long hex color string, for example, '#000000'
Type: enum • Path: android.splash.dark.resizeMode
Determines how the image will be displayed in the splash loading screen. Must be one of cover, contain or native, defaults to contain.
Type: string • Path: android.splash.dark.image
Local path or remote URL to an image to fill the background of the loading screen. Image size and aspect ratio are up to you. Must be a .png.
Type: string • Path: android.splash.dark.mdpi
Local path or remote URL to an image to fill the background of the loading screen in "native" mode. Image size and aspect ratio are up to you. Learn more
Natural sized image (baseline)
Type: string • Path: android.splash.dark.hdpi
Local path or remote URL to an image to fill the background of the loading screen in "native" mode. Image size and aspect ratio are up to you. Learn more
Scale 1.5x
Type: string • Path: android.splash.dark.xhdpi
Local path or remote URL to an image to fill the background of the loading screen in "native" mode. Image size and aspect ratio are up to you. Learn more
Scale 2x
Type: string • Path: android.splash.dark.xxhdpi
Local path or remote URL to an image to fill the background of the loading screen in "native" mode. Image size and aspect ratio are up to you. Learn more
Scale 3x
Type: string • Path: android.splash.dark.xxxhdpi
Local path or remote URL to an image to fill the background of the loading screen in "native" mode. Image size and aspect ratio are up to you. Learn more
Scale 4x
Type: array • Path: android.intentFilters
Configuration for setting an array of custom intent filters in Android manifest. Learn more
This is set in AndroidManifest.xml directly. Learn more.
Example
[
{
"autoVerify": true,
"action": "VIEW",
"data": {
"scheme": "https",
"host": "*.example.com"
},
"category": [
"BROWSABLE",
"DEFAULT"
]
}
]Type: boolean • Path: android.intentFilters.autoVerify
You may also use an intent filter to set your app as the default handler for links (without showing the user a dialog with options). To do so use true and then configure your server to serve a JSON file verifying that you own the domain. Learn more
Type: string • Path: android.intentFilters.action
Type: undefined • Path: android.intentFilters.data
Type: undefined • Path: android.intentFilters.category
Type: boolean • Path: android.allowBackup
Allows your user's app data to be automatically backed up to their Google Drive. If this is set to false, no backup or restore of the application will ever be performed (this is useful if your app deals with sensitive information). Defaults to the Android default, which is true.
Type: enum • Path: android.softwareKeyboardLayoutMode
Determines how the software keyboard will impact the layout of your application. This maps to the android:windowSoftInputMode property. Defaults to resize. Valid values: resize, pan.
Type: enum • Path: android.jsEngine
Specifies the JavaScript engine for Android apps. Supported only on EAS Build and in Expo Go. Defaults to hermes. Valid values: hermes, jsc.
One of types: {
"type": "string",
"pattern": "^[a-zA-Z\\d][a-zA-Z\\d._+()-]{0,254}$"
}{
"type": "string",
"pattern": "^exposdk:((\\d+\\.\\d+\\.\\d+)|(UNVERSIONED))$"
}{
"type": "object",
"properties": {
"policy": {
"type": "string",
"enum": [
"nativeVersion",
"sdkVersion",
"appVersion",
"fingerprint"
]
}
},
"required": [
"policy"
]
} • Path: android.runtimeVersion
Property indicating compatibility between a Android build's native code and an OTA update for the Android platform. If provided, this will override the value of top level runtimeVersion key on Android.
Type: object
Configuration that is specific to the web platform.
Type: enum • Path: web.output
Sets the export method for the web app for both expo start and expo export. static statically renders HTML files for every route in the app/ directory, which is available only in Expo Router apps. single outputs a Single Page Application (SPA), with a single index.html in the output folder, and has no statically indexable HTML. server outputs static HTML, and API Routes for hosting with a custom Node.js server. Defaults to single.
Type: string • Path: web.name
Defines the title of the document, defaults to the outer level name
Type: string • Path: web.shortName
A short version of the app's name, 12 characters or fewer. Used in app launcher and new tab pages. Maps to short_name in the PWA manifest.json. Defaults to the name property.
Maximum 12 characters long
Type: string • Path: web.lang
Specifies the primary language for the values in the name and short_name members. This value is a string containing a single language tag.
Type: string • Path: web.scope
Defines the navigation scope of this website's context. This restricts what web pages can be viewed while the manifest is applied. If the user navigates outside the scope, it returns to a normal web page inside a browser tab/window. If the scope is a relative URL, the base URL will be the URL of the manifest.
Type: string • Path: web.themeColor
Defines the color of the Android tool bar, and may be reflected in the app's preview in task switchers.
6 character long hex color string, for example, '#000000'
Type: string • Path: web.description
Provides a general description of what the pinned website does.
Type: enum • Path: web.dir
Specifies the primary text direction for the name, short_name, and description members. Together with the lang member, it helps the correct display of right-to-left languages.
Type: enum • Path: web.display
Defines the developers’ preferred display mode for the website.
Type: string • Path: web.startUrl
The URL that loads when a user launches the application (e.g., when added to home screen), typically the index. Note: This has to be a relative URL, relative to the manifest URL.
Type: enum • Path: web.orientation
Defines the default orientation for all the website's top level browsing contexts.
Type: string • Path: web.backgroundColor
Defines the expected “background color” for the website. This value repeats what is already available in the site’s CSS, but can be used by browsers to draw the background color of a shortcut when the manifest is available before the stylesheet has loaded. This creates a smooth transition between launching the web application and loading the site's content.
6 character long hex color string, for example, '#000000'
Type: enum • Path: web.barStyle
If content is set to default, the status bar appears normal. If set to black, the status bar has a black background. If set to black-translucent, the status bar is black and translucent. If set to default or black, the web content is displayed below the status bar. If set to black-translucent, the web content is displayed on the entire screen, partially obscured by the status bar.
Type: boolean • Path: web.preferRelatedApplications
Hints for the user agent to indicate to the user that the specified native applications (defined in expo.ios and expo.android) are recommended over the website.
Type: object • Path: web.dangerous
Experimental features. These will break without deprecation notice.
Type: object • Path: web.splash
Configuration for PWA splash screens.
Type: string • Path: web.splash.backgroundColor
Color to fill the loading screen background
6 character long hex color string, for example, '#000000'
Type: enum • Path: web.splash.resizeMode
Determines how the image will be displayed in the splash loading screen. Must be one of cover or contain, defaults to contain.
Type: string • Path: web.splash.image
Local path or remote URL to an image to fill the background of the loading screen. Image size and aspect ratio are up to you. Must be a .png.
Type: object • Path: web.config
Firebase web configuration. Used by the expo-firebase packages on both web and native. Learn more
Type: object • Path: web.config.firebase
Type: string • Path: web.config.firebase.apiKey
Type: string • Path: web.config.firebase.authDomain
Type: string • Path: web.config.firebase.databaseURL
Type: string • Path: web.config.firebase.projectId
Type: string • Path: web.config.firebase.storageBucket
Type: string • Path: web.config.firebase.messagingSenderId
Type: string • Path: web.config.firebase.appId
Type: string • Path: web.config.firebase.measurementId
Type: enum • Path: web.bundler
Sets the bundler to use for the web platform. Only supported in the local CLI npx expo. Defaults to webpack if the @expo/webpack-config package is installed, if not, it defaults to metro.
Type: object
Enable experimental features that may be unstable, unsupported, or removed without deprecation notices.
Type: string • Path: experiments.baseUrl
Export a website relative to a subpath of a domain. The path will be prepended as-is to links to all bundled resources. Prefix the path with a / (recommended) to load all resources relative to the server root. If the path does not start with a / then resources will be loaded relative to the code that requests them, this could lead to unexpected behavior. Example '/subpath'. Defaults to '' (empty string).
Type: boolean • Path: experiments.supportsTVOnly
If true, indicates that this project does not support tablets or handsets, and only supports Apple TV and Android TV
Type: boolean • Path: experiments.tsconfigPaths
Enable tsconfig/jsconfig compilerOptions.paths and compilerOptions.baseUrl support for import aliases in Metro.
Type: boolean • Path: experiments.typedRoutes
Enable support for statically typed links in Expo Router. This feature requires TypeScript be set up in your Expo Router v2 project.
Type: boolean • Path: experiments.turboModules
Enables Turbo Modules, which are a type of native modules that use a different way of communicating between JS and platform code. When installing a Turbo Module you will need to enable this experimental option (the library still needs to be a part of Expo SDK already, like react-native-reanimated v2). Turbo Modules do not support remote debugging and enabling this option will disable remote debugging.
Type: boolean • Path: experiments.reactCanary
Experimentally use a vendored canary build of React for testing upcoming features.
Type: object
Internal properties for developer tools