Такая же проблема.
не работает
/(?=.*\d\d)(?=^\D.{5,})/
. $('.payment-innovation .list-block .list-block__head').click(function() {
const $this = $(this);
const $items = $this.closest('.list-block').find('.item');
const hidden = $this.toggleClass('hidden').hasClass('hidden');
const duration = 400;
$items.each((i, n) => $(n)
.delay((hidden ? $items.length - i - 1 : i) * duration)
.animate({ opacity: +!hidden }, duration)
);
});