vite process is not defined
short answer:
use "import.meta.env.PROD" instead of "process.env.production"
Vite exposes env variables on the special import.meta.env object. Some built-in variables are available in all cases:
import.meta.env.MODE: {string} the mode the app is running in.
import.meta.env.BASE_URL: {string} the base url the app is being served from. This is determined by the base config option.
import.meta.env.PROD: {boolean} whether the app is running in production.
import.meta.env.DEV: {boolean} whether the app is running in development (always the opposite of import.meta.env.PROD)