Is it possible to make an object with variables?

Question

css

Is it possible to use something like this

$border = {
  sm: 30px,
  md: 50px
}

And than
border-radius: $border-sm

Answer 1

It is possible, but when using a property in an object, a colon is required, otherwise there will be an error

border-radius $border.sm // err
border-radius: $border.sm // good