@use "sass:list";
@use "sass:meta";

/// Returns a SCSS selector self-reference ("&") when the current value matches the default value,
/// otherwise returns null. This is useful for conditionally applying styles only when a component
/// option is set to its default value, allowing default styles to be grouped together.
/// @param {String} $default - The default value to compare against.
/// @param {String | List} $current - The current value to check. Can be a single value or a list of values.
/// @return {String | Null} - Returns "&," when values match, null otherwise.

@function k-when-default($default, $current) {
  @if meta.type-of($current) == "list" {
    @return if(list.index($current, $default) != null, "&,", null);
  }
  @return if($default == $current, "&,", null);
}