Generated by SassMeister.com.

input.scss

@font-face {
  font-family: 'My Sans';
}

.slds-badge {
  background-color: token("var(--foo, "+#{runtimeVar}+")");
}

output.css

@font-face {
  font-family: "My Sans";
}
.slds-badge {
  background-color: token("var(--foo, runtimeVar)");
}

settings.json

{
  "sass": {
    "compiler": "dart-sass/1.26.11",
    "extensions": {},
    "syntax": "SCSS",
    "outputStyle": "expanded"
  },
  "autoprefixer": false
}