const envConfig = { development: { SITE_URL: 'http://localhost:3000', API_URL: 'http://localhost:3000/api' }, testing: { SITE_URL: 'https://test.site.com', API_URL: 'https://api.test.site.com' }, production: { SITE_URL: 'https://site.com', API_URL: 'https://api.site.com' } } const currentEnv = process.env.NODE_ENV export default envConfig[currentEnv] /* ---- USE IN COMPONENETS JS ---- import env from './env' console.log(env.SITE_URL) */ /* ---- RUN SCRIPTS (package.json) ---- ... "scripts": { "dev": "NODE_ENV=development ...", "testing": "NODE_ENV=testing ...", "build": "NODE_ENV=production ...", }, ... */