https://uggbatai.lt/sites/all/modules/ubercart/uc_cart/uc_cart_block.js?p8z9e9

1/**
2 * @file
3 * Adds effects and behaviors to the cart block.
4 */
5
6/**
7 * Sets the behavior to (un)collapse the cart block on a click
8 */
9Drupal.behaviors.ucCollapseBlock = {
10  attach: function(context) {
11    jQuery('.cart-block-title-bar:not(.ucCollapseBlock-processed)', context).addClass('ucCollapseBlock-processed').click(
12      function() {
13        var $items = jQuery('.cart-block-items').toggleClass('collapsed');
14        jQuery('.cart-block-arrow').toggleClass('arrow-down', $items.hasClass('collapsed'));
15      }
16    );
17  }
18}