@react-native-community/netinfo

 !Supports Android and iOS !MIT License

React Native Network Info API for Android & iOS. It allows you to get information on:

* Online/offline status
* 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
`

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):

Manually link the library on iOS

Either follow the instructions in the React Native documentation to manually link the framework or link using Cocoapods by adding this to your Podfile:

`ruby
pod 'react-native-netinfo', :path => '../node_modules/@react-native-community/netinfo'
`

Manually link the library on Android

Make the following changes:

#### android/settings.gradle
`groovy
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
`groovy
dependencies {
...
implementation project(':react-native-community-netinfo')
}
`

#### android/app/src/main/.../MainApplication.java
On top, where imports are:

`java
import com.reactnativecommunity.netinfo.NetInfoPackage;
`

Add the RNLocationPackage class to your list of exported packages.

`java
@Override
protected List getPackages() {
return Arrays.asList(
new MainReactPackage(),
new NetInfoPackage()
);
}
`


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:

`javascript
import { NetInfo } from "react-native";
`

to:

`javascript
import NetInfo from "@react-native-community/netinfo";
`

Usage

Start by importing the library:

`javascript
import NetInfo from "@react-native-community/netinfo";
`

$3


Returns a promise that resolves to an object with type and effectiveType keys whose values are a ConnectionType and an EffectiveConnectionType), respectively.

`javascript
NetInfo.getConnectionInfo().then(connectionInfo => {
console.log("Connection type", connectionInfo.type);
console.log("Connection effective type", connectionInfo.effectiveType);
});
`

#### ConnectionType
Cross platform values:

* none - Device is offline
* wifi - Device is online and connected via wifi, or is the iOS simulator
* cellular - Device is connected via Edge, 3G, WiMax, or LTE
* unknown - Error case and the network status is unknown

Android-only values:

* bluetooth - Device is connected via Bluetooth
* ethernet - Device is connected via Ethernet
* wimax - Device is connected via WiMAX

#### EffectiveConnectionType
Cross platform values:

* 2g
* 3g
* 4g
* unknown

$3


Subscribe to connection information. The callback is called whenever the connection status changes. The returned object shape is the same as getConnectionInfo above.

`javascript
const listener = connectionInfo => {
console.log("Connection type", connectionInfo.type);
console.log("Connection effective type", connectionInfo.effectiveType);
};

// Subscribe
const subscription = NetInfo.addEventListener('connectionChange', listener);

// Unsubscribe through remove
subscription.remove();

// Unsubscribe through event name
NetInfo.removeEventListener('connectionChange', listener);
`

$3

Returns a promise that resolves to a boolean which says if there is an active connection.

Note: This only says if a device has an active connection, not that it is able to reach the internet.

Getting the connection status once:

`javascript
NetInfo.isConnected.fetch().then(isConnected => {
console.log("Is connected", isConnected);
});
`

Or subscribing to changes:

`javascript
const listener = isConnected => {
console.log("Is connected", isConnected);
};

// Subscribe
const subscription = NetInfo.isConnected.addEventListener('connectionChange', listener);

// Unsubscribe through remove
subscription.remove();

// Unsubscribe through event name
NetInfo.isConnected.removeEventListener('connectionChange', listener);
`

$3

Detect if the current active connection is metered or not. A network is classified as metered when the user is sensitive to heavy data usage on that connection due to monetary costs, data limitations or battery/performance issues.

`javascript
NetInfo.isConnectionExpensive().then(isConnectionExpensive => {
console.log("Is connection expensive", isConnectionExpensive);
});
`

Maintainers

* Matt Oakes - Freelance React Native Developer
* Mike Diarmid - Invertase

Contributing

Please see the contributing guide.

License

The library is released under the MIT license. For more information see LICENSE`.