@mixin arguments causing parse error

[stevenvachon]

@mixin border-shadow($inset: inset) {
  border: 1px solid silver;
  @if $inset == inset {
    box-shadow: inset 1px 1px 1px 0px, black;
  }
  @else if $inset == outset {
    box-shadow: 1px 1px 1px 0px black;
  }
}

a {
  @include border-shadow(inset);
  color: rebeccapurple;
}

"precss: /cp-pen-styles:6:13: Could not resolve the variable \"$inset\" within \"if $inset == outset\""

[AndriyHromyak]

i got same error, and i see this has been 2 year since last commit. is it supported? does any one know any alternatives?

[thisVioletHydra]

same problem 🤔

[clayteller]

I have the same issue 😕