Simple configurations to be used with Ionic

config.ts

import * as deepExtend  from 'deep-extend';

/**
 * Add default configurations here
 */
const DEFAULT_CONFIG = {
  config1: 'foo',
  config2: {
    nestedConfig1: 'dev'
  }
  // other configs ..
};

/**
 * Add development configurations here
 */
const DEV_CONGIF = {

};

/**
 * Add production configurations here
 */
const PROD_CONFIG = {
  config2: {
    nestedConfig1: 'prod'
  }
};

// merge both default, development, and production configurations
var _CONFIG;
if (process.env.IONIC_ENV == 'dev') {
  _CONFIG = deepExtend(DEFAULT_CONFIG, DEV_CONGIF);
} else if (process.env.IONIC_ENV == 'prod') {
  _CONFIG = deepExtend(DEFAULT_CONFIG, PROD_CONFIG);
}

export const CONFIG = _CONFIG;

How do you use this config in for instance app.module.ts?

import { CONFIG } from 'config';

@NgModule({
	declarations: [MyApp,...],
	imports: [
		...
		AngularFireModule.initializeApp(CONFIG.firebase),
	],
	bootstrap: [IonicApp],
	entryComponents: [MyApp,...],
	providers: [...]
})
export class AppModule {}

Typescript Error
Cannot find name 'process'.