Ideas for absolute Sass helper

absolute.scss

@mixin position($position, $args: null) {
  $offsets: bottom left right top;
  
  position: $position;
  
  @if (type-of($args) == 'list') {
    @each $offset in $offsets {                                        // 3
      $index: index($args, $offset);                                   // 4
      
      @if $index {                                                     // 5
        @if $index == length($args) {                                  // 6
          #{$offset}: 0;                                               // 7
        }
        @else {                                                        // 8
          $next: nth($args, $index + 1);                               // 9
          @if is-valid-length($next) {                                 // 10
            #{$offset}: $next;                                         // 11
          }
          @else if index($offsets, $next) {                            // 12
            #{$offset}: 0;                                             // 13
          }
          @else {                                                      // 14
            @warn "Invalid value `#{$next}` for offset `#{$offset}`."; // 15
          }
        }
      }
    }
  }
  @else if (type-of($args) == 'number') {
    @each $offset in $offsets {
      #{$offset}: $args;
    }
  }
}

@mixin absolute($args: null) {
  @include position(absolute, $args);
}

.test {
  @include absolute(left 10px bottom 0);
}

.test2 {
  -ms-scroll-snap-type: proximity;
         scroll-snap-type: mandatory;
}