@react-native-community/netinfo/src/internal/nativeInterface.ts

React Native Network Info API for iOS & Android

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @format
 */

import {NativeEventEmitter, NativeModules} from 'react-native';
import {NetInfoNativeModule} from './privateTypes';

const RNCNetInfo: NetInfoNativeModule | undefined = NativeModules.RNCNetInfo;

// Produce an error if we don't have the native module
if (!RNCNetInfo) {
  throw new Error(`@react-native-community/netinfo: NativeModule.RNCNetInfo is null. To fix this issue try these steps:

• Run \`react-native link @react-native-community/netinfo\` in the project root.
• Rebuild and re-run the app.
• If you are using CocoaPods on iOS, run \`pod install\` in the \`ios\` directory and then rebuild and re-run the app. You may also need to re-open Xcode to get the new pods.

If none of these fix the issue, please open an issue on the Github repository: https://github.com/react-native-community/react-native-netinfo`);
}

/**
 * We export the native interface in this way to give easy shared access to it between the
 * JavaScript code and the tests
 */
let nativeEventEmitter: NativeEventEmitter | null = null;
export default {
  ...RNCNetInfo,
  get eventEmitter(): NativeEventEmitter {
    if (!nativeEventEmitter) {
      /// @ts-ignore
      nativeEventEmitter = new NativeEventEmitter(RNCNetInfo);
    }
    /// @ts-ignore
    return nativeEventEmitter;
  },
};