Пропущенная функция

custom.js

function switchActivate() {
	$('.account-check').each(function () {
		var $this             = $(this),
		    link              = $this.find('.account-check__link'),
		    link_active       = $this.find('.account-check__link.active'),
		    link_active_width = link_active.outerWidth(),
		    link_sum_width    = 0;
		$this.append('<div class="account-check__block"></div>');
		var check_block = $('.account-check__block');
		check_block.css({'width': link_active_width});

		link.each(function () {
			link_sum_width = $(this).outerWidth() + link_sum_width;
		})
		$this.closest('.account-check__parent').css({'width': link_sum_width + 1});
	})
}