_recursive-map-merge.scss

@function recursive-map-merge($map1, $map2, $config:() ) {
	@if (type-of($map1) == map or (type-of($map1) == list and length($map1) == 0)) and (type-of($map2) == map or (type-of($map2) == list and length($map2) == 0)) {
		$result: $map1;
		@each $key, $value in $map2 {
			@if (type-of(map-get($result, $key)) == map and type-of($value) == map) {
				$result: map-merge($result, ($key: recursive-map-merge(map-get($result, $key), $value)));
			}
			@else if (map-get($config, "merge-lists") and type-of(map-get($result, $key)) == list and type-of($value) == list) {
				$result: map-merge($result, ($key: join(map-get($result, $key), $value)));
			}
			@else {
				$result: map-merge($result, ($key: $value));
			}
		}
		@return $result;
	}
	@else {
		@warn "recursive-map-merge() expects it\'s parameters to be map types!";
		@return null;
	}
}