fluid-value.scss

// based on https://css-tricks.com/snippets/css/fluid-typography/
// This doesn't have to be limited to font-size! Go wild! 

@function strip-unit($value) {
  @return $value / ($value * 0 + 1);
}

@function fluid($min-vw, $max-vw, $min-size, $max-size) {
  $u1: unit($min-vw);
  $u2: unit($max-vw);
  $u3: unit($min-size);
  $u4: unit($max-size);

  @if $u1 == $u2 and $u1 == $u3 and $u1 == $u4 {
    @return max(#{$min-size}, min(#{$max-size}, calc(#{$min-size} + #{strip-unit($max-size - $min-size)} * ((100vw - #{$min-vw}) / #{strip-unit($max-vw - $min-vw)}))));
  }
}