@react-native-community/netinfo
 
React Native Network Info API for Android, iOS & Windows. It allows you to get information on:
- Connection type
- Connection quality
Getting started
Install the library using either Yarn:
yarn add @react-native-community/netinfo
or npm:
npm install --save @react-native-community/netinfo
Using React Native >= 0.60
Linking the package manually is not required anymore with Autolinking.
-
iOS Platform:
$ cd ios && pod install && cd ..# CocoaPods on iOS needs this extra step -
Android Platform with Android Support:
Using Jetifier tool for backward-compatibility.
Modify your android/build.gradle configuration:
buildscript { ext { buildToolsVersion = "28.0.3" minSdkVersion = 16 compileSdkVersion = 28 targetSdkVersion = 28 # Only using Android Support libraries supportLibVersion = "28.0.0" } -
Android Platform with AndroidX:
Modify your android/build.gradle configuration:
buildscript { ext { buildToolsVersion = "28.0.3" minSdkVersion = 16 compileSdkVersion = 28 targetSdkVersion = 28 # Remove 'supportLibVersion' property and put specific versions for AndroidX libraries androidXCore = "1.0.2" // Put here other AndroidX dependencies }
Using React Native < 0.60
You then need to link the native parts of the library for the platforms you are using. The easiest way to link the library is using the CLI tool by running this command from the root of your project:
react-native link @react-native-community/netinfo
If you can't or don't want to use the CLI tool, you can also manually link the library using the instructions below (click on the arrow to show them):
Either follow the instructions in the React Native documentation to manually link the framework or link using Cocoapods by adding this to your Podfile:
pod 'react-native-netinfo', :path => '../node_modules/@react-native-community/netinfo'
Make the following changes:
android/settings.gradle
include ':react-native-community-netinfo'
project(':react-native-community-netinfo').projectDir = new File(rootProject.projectDir, '../node_modules/@react-native-community/netinfo/android')
android/app/build.gradle
dependencies {
...
implementation project(':react-native-community-netinfo')
}
android/app/src/main/.../MainApplication.java
On top, where imports are:
import com.reactnativecommunity.netinfo.NetInfoPackage;
Add the NetInfoPackage class to your list of exported packages.
@Override
protected List<ReactPackage> getPackages() {
return Arrays.asList(
new MainReactPackage(),
new NetInfoPackage()
);
}
- Open the solution in Visual Studio for your Windows apps
- Right click in the Explorer and click Add > Existing Project...
- Navigate to
./<app-name>/node_modules/@react-native-community/netinfo/windows/RNCNetInfo/and addRNCNetInfo.csproj - This time right click on your React Native Windows app under your solutions directory and click Add > Reference...
- Check the
RNCNetInfoyou just added and press ok - Open up
MainReactNativeHost.csfor your app and edit the file like so:
+ using ReactNativeCommunity.NetInfo;
......
protected override List<IReactPackage> Packages => new List<IReactPackage>
{
new MainReactPackage(),
+ new RNCNetInfoPackage(),
};
React Native Compatibility
To use this library you need to ensure you are using the correct version of React Native. If you are using a version of React Native that is lower than 0.57 you will need to upgrade that before attempting to use this library., @react-native-community/netinfo version, Required React Native Version, -----------------------------------------, ---------------------------------------------------------------------------------, 4.x.x & 5.x.x, >= 0.60 or >= 0.59 if using Jetifier, 3.x.x, >= 0.59, 2.x.x, >= 0.57, 1.x.x, >= 0.57, ## Browser Compatilibity
The web implementation heavily depends on the Network Information API which is still an is an experimental technology and thus it's not supported in every browser.
If this API is not available the library will safely fallback to the old onLine property and return basic connection information.
Migrating from the core react-native module
This module was created when the NetInfo was split out from the core of React Native. To migrate to this module you need to follow the installation instructions above and then change you imports from:
import { NetInfo } from "react-native";
to:
import NetInfo from "@react-native-community/netinfo";
Note that the API was updated after it was extracted from NetInfo to support some new features, however, the previous API is still available and works with no updates to your code.
Usage
Import the library:
import NetInfo from "@react-native-community/netinfo";
Subscribe to network state updates:
// Subscribe
const unsubscribe = NetInfo.addEventListener(state => {
console.log("Connection type", state.type);
console.log("Is connected?", state.isConnected);
});
// Unsubscribe
unsubscribe();
Get the network state once:
NetInfo.fetch().then(state => {
console.log("Connection type", state.type);
console.log("Is connected?", state.isConnected);
});
API
- Types:
- Methods:
Types
NetInfoState
Describes the current state of the network. It is an object with these properties:, Property, Type, Description, ---------------------, ---------------------------------------, --------------------------------------------------------------------------------------------------, type, NetInfoStateType, The type of the current connection., isConnected, boolean, If there is an active network connection. Note that this DOES NOT mean that internet is reachable., isInternetReachable, boolean, If the internet is reachable with the currently active network connection., isWifiEnabled, boolean, (Android only) Whether the device's WiFi is ON or OFF., details, The value depends on the type value. See below., The details value depends on the type value.
type is none or unknown
details is null.
type is wifi
details has these properties:, Property, Platform, Type, Description, -----------------------, -----------------------, ---------, --------------------------------------------------------------------------------------------------------------------------, isConnectionExpensive, Android, iOS, Windows, Web, boolean, If the network connection is considered "expensive". This could be in either energy or monetary terms., ssid, Android, iOS (not tvOS), string, The SSID of the network. May not be present, null, or an empty string if it cannot be determined. On iOS, make sure your app meets at least one of the following requirements. On Android, you need to have the ACCESS_FINE_LOCATION permission in your AndroidManifest.xml and accepted by the user., strength, Android, number, An integer number from 0 to 5 for the signal strength. May not be present if the signal strength cannot be determined., ipAddress, Android, iOS, string, The external IP address. Can be in IPv4 or IPv6 format. May not be present if it cannot be determined., subnet, Android, iOS, string, The subnet mask in IPv4 format. May not be present if it cannot be determined., ##### type is cellular
details has these properties:, Property, Platform, Type, Description, -----------------------, --------------------------, ------------------------------------------------------------------, ---------------------------------------------------------------------------------------------------------------------, isConnectionExpensive, Android, iOS, Windows, Web, boolean, If the network connection is considered "expensive". This could be in either energy or monetary terms., cellularGeneration, Android, iOS, Windows, NetInfoCellularGeneration, The generation of the cell network the user is connected to. This can give an indication of speed, but no guarantees., carrier, Android, iOS, string, The network carrier name. May not be present or may be empty if none can be determined., ##### type is bluetooth, ethernet, wimax, vpn, or other
details has these properties:, Property, Type, Description, -----------------------, ---------, ------------------------------------------------------------------------------------------------------, isConnectionExpensive, boolean, If the network connection is considered "expensive". This could be in either energy or monetary terms., #### NetInfoStateType
Describes the current type of network connection. It is an enum with these possible values:, Value, Platform, Description, -----------, --------------------------, ----------------------------------------------------------, none, Android, iOS, Windows, Web, No network connection is active, unknown, Android, iOS, Windows, Web, The network state could not or has yet to be be determined, cellular, Android, iOS, Windows, Web, Active network over cellular, wifi, Android, iOS, Windows, Web, Active network over Wifi, bluetooth, Android, Web, Active network over Bluetooth, ethernet, Android, Windows, Web, Active network over wired ethernet, wimax, Android, Web, Active network over WiMax, vpn, Android, Active network over VPN, other, Android, iOS, Windows, Web, Active network over another type of network, #### NetInfoCellularGeneration
Describes the current generation of the cellular connection. It is an enum with these possible values:, Value, Description, ---------, -----------------------------------------------------------------------------------------------------------------, null, Either we are not currently connected to a cellular network or type could not be determined, 2g, Currently connected to a 2G cellular network. Includes CDMA, EDGE, GPRS, and IDEN type connections, 3g, Currently connected to a 3G cellular network. Includes EHRPD, EVDO, HSPA, HSUPA, HSDPA, and UTMS type connections, 4g, Currently connected to a 4G cellular network. Includes HSPAP and LTE type connections, #### NetInfoConfiguration
The configuration options for the library., Property, Type, Description, ----------------------------, ---------------------------------, -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------, reachabilityUrl, string, The URL to call to test if the internet is reachable. Only used on platforms which do not supply internet reachability natively., reachabilityTest, (response: Response) => boolean, A function which is passed the Response from calling the reachability URL. It should return true if the response indicates that the internet is reachable. Only used on platforms which do not supply internet reachability natively., reachabilityShortTimeout, number, The number of milliseconds between internet reachability checks when the internet was not previously detected. Only used on platforms which do not supply internet reachability natively., reachabilityLongTimeout, number, The number of milliseconds between internet reachability checks when the internet was previously detected. Only used on platforms which do not supply internet reachability natively., reachabilityRequestTimeout, number, The number of milliseconds that a reachability check is allowed to take before failing. Only used on platforms which do not supply internet reachability natively., ### Methods
configure()
Configures the library with the given configuration. You only need to supply the properties which you want to change from the default values.
Note that calling this will stop all previously added listeners from being called again. It is best to call this right when your application is started to avoid issues.
Example:
NetInfo.configure({
reachabilityUrl: 'https://clients3.google.com/generate_204',
reachabilityTest: async (response) => response.status === 204,
reachabilityLongTimeout: 60 * 1000, // 60s
reachabilityShortTimeout: 5 * 1000, // 5s
reachabilityRequestTimeout: 15 * 1000, // 15s
});
addEventListener()
Subscribe to connection information. The callback is called with a parameter of type NetInfoState whenever the connection state changes. Your listener will be called with the latest information soon after you subscribe and then with any subsequent changes afterwards. You should not assume that the listener is called in the same way across devices or platforms., Parameter, Type, Description, -----------, -------------------------------------------------------------, -----------------------------------------------------------------------, listener, (state: NetInfoState) => void, The listener which will be called whenever the connection state changes, Example:
// Subscribe
const unsubscribe = NetInfo.addEventListener(state => {
console.log("Connection type", state.type);
console.log("Is connected?", state.isConnected);
});
// Unsubscribe
unsubscribe();
useNetInfo()
A React Hook which can be used to get access to the latest state. It returns a hook with the NetInfoState type.
Example:
import {useNetInfo} from "@react-native-community/netinfo";
const YourComponent = () => {
const netInfo = useNetInfo();
return (
<View>
<Text>Type: {netInfo.type}</Text>
<Text>Is Connected? {netInfo.isConnected.toString()}</Text>
</View>
);
};
You can optionally send configuration when setting up the hook. Note that configuration is global for the library, so you shouldn't send different configuration for different hooks. It is instead recommended that you called NetInfo.configure() once when your project starts. The hook option is only provided as a convinience.
const YourComponent = () => {
const netInfo = useNetInfo({
reachabilityUrl: 'https://clients3.google.com/generate_204',
reachabilityTest: async (response) => response.status === 204,
reachabilityLongTimeout: 60 * 1000, // 60s
reachabilityShortTimeout: 5 * 1000, // 5s
reachabilityRequestTimeout: 15 * 1000, // 15s
});
// ...
};
fetch()
Returns a Promise that resolves to a NetInfoState object.
Example:
NetInfo.fetch().then(state => {
console.log("Connection type", state.type);
console.log("Is connected?", state.isConnected);
});
You can optionally send an interface string so the Promise resolves to a NetInfoState from the NetInfoStateType indicated in interface argument.
NetInfo.fetch("wifi").then(state => {
console.log("SSID", state.details.ssid);
console.log("Is connected?", state.isConnected);
});
Troubleshooting
Errors when building on Android
This library was migrated from using the support library to AndroidX in version 4.0.0. All of your depenencies must be using either the support library or AndroidX. Using a mixture of the two is not possible.
From React Native 0.60 AndroidX is used by default.
If you need to either convert this library back to the support library (to use an older React Native version) or convert other libraries forward to use AndroidX (if they have not been updated yet), you can use the Jetifier tool.
Errors while running Jest tests
If you do not have a Jest Setup file configured, you should add the following to your Jest settings and create the jest.setup.js file in project root:
setupFiles: ['<rootDir>/jest.setup.js']
You should then add the following to your Jest setup file to mock the NetInfo Native Module:
import { NativeModules } from 'react-native';
import RNCNetInfoMock from './jest/netinfo-mock.js';
NativeModules.RNCNetInfo = RNCNetInfoMock;
Issues with the iOS simulator
There is a known issue with the iOS Simulator which causes it to not receive network change notifications correctly when the host machine disconnects and then connects to Wifi. If you are having issues with iOS then please test on an actual device before reporting any bugs.
Maintainers
Contributing
Please see the contributing guide.
License
The library is released under the MIT license. For more information see LICENSE.
