space mixin

space.scss

$space: .5rem !default;
$space-aliases: () !default;

// Compute spacing value
// space(1) => $space
// space(2, 1rem) => 2rem

@function space($multiple: 1, $space: $space) {
  @if map-has-key($space-aliases, $multiple) {
    $multiple: map-get($space-aliases, $multiple);
  }
  @return $multiple * $space;
}