gistfile1.txt

$list = $('.collections__list');
$item = $list.find('.list__item--is-selected');
$prev = $item.prev();
$prepended = false;
    
if ($(window).width() < 700 && $item.index() != 0 && !prepended) {
  $list.prependTo('.collections__list');
  prepended = true;
}
else if ($(window).width() > 700 && prepended) {
  $list.prependTo('.collections__list');
  $prev.after($item);
}