mixin-position-args.scss

@mixin position($position, $args) {
  @each $dir in top, left, bottom, right {
    $i: index($args, $dir);
    @if $i {
      #{$dir}: nth($args, $i + 1);
    }
  }
  position: $position;
}

@mixin absolute($args) {
  @include position(absolute, $args);
}
@mixin relative($args) {
  @include position(relative, $args);
}
@mixin fixed($args) {
  @include position(fixed, $args);
}