const isTest = process . env . NODE_ENV === 'test' ; exports . isProduction = process . env . NODE_ENV === 'production' ; exports . isCI = Boolean ( process . env . CI ) ; exports . isTest = isTest ; exports . isDevelopment = isTest || process . env . NODE_ENV === 'development' ; exports . isDev = exports . isDevelopment ; exports . isProd = exports . isProduction ; exports . isHot = Boolean ( process . env . HOT ) ; exports . isBrowser = ! process && typeof window !== 'undefined' ;