Interpolation sass

You can use interpolation to inject values from expressions like variables and function calls into your selectors. This is particularly useful when you’re writing mixins, since it allows you to create selectors from parameters your users pass in.

code sass

@mixin define-emoji($name, $glyph) {
  span.emoji-#{$name} {
    font-family: IconFont;
    font-variant: normal;
    font-weight: normal;
    content: $glyph;
  }
}

@include define-emoji("women-holding-hands", "");

code css

@charset "UTF-8";
span.emoji-women-holding-hands {
  font-family: IconFont;
  font-variant: normal;
  font-weight: normal;
  content: "";
}