@use 'sass:list';
@use 'sass:meta';

/**
 * Removes the list element by index.
 *
 * @param    {list}      $list          The input list.
 * @param    {number}    $index ['']    The list element index to remove. Use negative index to remove from the end of list.
 *
 * @return   {list}      A list without element with specified `$index` if found, original list clone otherwise.
 */
@function list-remove($list, $index: null) {
	$result: ();
	$index: if(meta.type-of($index) == 'number', $index, 0);
	$index: if($index < 0, list.length($list) + $index + 1, $index);
	$bracketed: list.is-bracketed($list);
	$separator: list.separator($list);

	@for $i from 1 through list.length($list) {
		@if $i != $index {
			$result: list.append($result, list.nth($list, $i));
		}
	}

	@return list.join((), $result, $separator, $bracketed);
}