react-native-netinfo

Notifies your app when the network connection goes online or offline.

Inspired by react-network and react-native-offline, designed with a similar API to the former for when you need a simpler and lighter package than the latter.

Installation

npm install react-native-netinfo
# or with yarn
yarn add react-native-netinfo

Usage

With a render prop

import { NetInfoProvider } from 'react-native-netinfo';

const App = () => (
  <View>
    <NetInfoProvider
      onChange={({ isConnected, connectionInfo }) => {
        console.log(isConnected);
        console.log(connectionInfo);
      }}
      render={({ isConnected, connectionInfo }) =>
        isConnected ? (
          <React.Fragment>
            <Text>Wonderful, you are connected!</Text>
            <Text>Connection type: {connectionInfo.type}</Text>
            <Text>
              Effective connection type:{connectionInfo.effectiveType}
            </Text>
          </React.Fragment>
        ) : (
          <Text>It looks like you encounter connectivity problems.</Text>
        )
      }
    />
  </View>
);

With children as a function

import { NetInfoProvider } from 'react-native-netinfo';

const App = () => (
  <View>
    <NetInfoProvider
      onChange={({ isConnected, connectionInfo }) => {
        console.log(isConnected);
        console.log(connectionInfo);
      }}
    >
      {({ isConnected, connectionInfo }) =>
        isConnected ? (
          <React.Fragment>
            <Text>Wonderful, you are connected!</Text>
            <Text>Connection type: {connectionInfo.type}</Text>
            <Text>
              Effective connection type:{connectionInfo.effectiveType}
            </Text>
          </React.Fragment>
        ) : (
          <Text>It looks like you encounter connectivity problems.</Text>
        )
      }
    </NetInfoProvider>
  </View>
);

With component injection

import { NetInfoProvider } from 'react-native-netinfo';

const ConnectedComponent = ({ isConnected, connectionInfo }) =>
  isConnected ? (
    <React.Fragment>
      <Text>Wonderful, you are connected!</Text>
      <Text>Connection type: {connectionInfo.type}</Text>
      <Text>Effective connection type:{connectionInfo.effectiveType}</Text>
    </React.Fragment>
  ) : (
    <Text>It looks like you encounter connectivity problems.</Text>
  );

const App = () => (
  <View>
    <NetInfoProvider
      onChange={({ isConnected, connectionInfo }) => {
        console.log(isConnected);
        console.log(connectionInfo);
      }}
      component={ConnectedComponent}
    />
  </View>
);

NB: you should not set both component and render props. If you were to do this, the render prop would be ignored.

Constants

This package also exposes constants for connection info's types and effective types.

You can use them like so:

import { CONSTANTS } from 'react-native-netinfo';

const App = () => (
  <View>
    <Text>{CONSTANTS.CONNECTION_INFO.TYPES.WIFI}</Text>
    <Text>{CONSTANTS.CONNECTION_INFO.EFFECTIVE_TYPES['4G']}</Text>
  </View>
);

You can find the full list of types and effective types in the official React Native documentation about NetInfo.