Generated by SassMeister.com.

input.scss

.toolbar {
    $this: &;
    &--toggled {
      #{$this}--delete {
        background-color: rgba(red, 0.15);
      }
    }
}

output.css

.toolbar--toggled .toolbar--delete {
  background-color: rgba(255, 0, 0, 0.15);
}

settings.json

{
  "sass": {
    "compiler": "dart-sass/1.32.12",
    "extensions": {},
    "syntax": "SCSS",
    "outputStyle": "expanded"
  },
  "autoprefixer": false
}