How to get development or production env in a browser ?

[Zhengqbbb]

In the browser environment can I know whether it is currently development or production env?

e.g:

// theme/index.ts
export default {
  setup() {
    if (typeof document !== 'undefined') {
      if (production)
        // do somthing
      else
        // do somthing DEBUG
    }
  }
}

[brc-dd]

Try import.meta.env.MODE or import.meta.env.PROD or import.meta.env.DEV?