sample.enviroment.ts

/*****************************
 * environment.js
 * path: '/environment.js' (root of your project)
 ******************************/

import Constants from "expo-constants";
import { Platform } from "react-native";

const localhost = Platform.OS === "ios" ? "localhost:8080" : "10.0.2.2:8080";

const ENV = {
  dev: {
    apiUrl: localhost,
    amplitudeApiKey: undefined,
  },
  staging: {
    apiUrl: "[your.staging.api.here]",
    amplitudeApiKey: "[Enter your key here]",
    // Add other keys you want here
  },
  prod: {
    apiUrl: "[your.production.api.here]",
    amplitudeApiKey: "[Enter your key here]",
    // Add other keys you want here
  },
};

const getEnvVars = (env = Constants.manifest!.releaseChannel) => {
  // What is __DEV__ ?
  // This variable is set to true when react-native is running in Dev mode.
  // __DEV__ is true when run locally, but false when published.
  if (__DEV__) {
    return ENV.dev;
  } else if (env === "staging") {
    return ENV.staging;
  } else if (env === "prod") {
    return ENV.prod;
  }
};

export default getEnvVars;