sprinkles array value

[JiangWeixian]

If I define follow sprinkles

import { defineProperties, createSprinkles } from '@vanilla-extract/sprinkles'

const unResponsiveStyles = defineProperties({
   bg: {
      fixed: {
         background-attachment: fixed;
      },
      repeat: {
         background-repeat: repeat; 
      }
   }
})

export const sprinkles = createSprinkles(responsiveStyles)

is able to be used it in this way

const cx = sprinkles({
   bg: ['fixed', 'repeat']
})

it means

{
    background-attachment: fixed;
    background-repeat: repeat; 
}