How to include ajax loader

How to add https://devdocs.magento.com/guides/v2.4/javascript-dev-guide/widgets/widget_loader.html ajax loader to my script,

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define([ 'jquery', 'Magento_Customer/js/model/authentication-popup', 'Magento_Customer/js/customer-data', 'Magento_Ui/js/modal/alert', 'Magento_Ui/js/modal/confirm', 'underscore', 'jquery/ui', 'mage/decorate', 'mage/collapsible', 'mage/cookies' ], function ($, authenticationPopup, customerData, alert, confirm, _) { 'use strict'; return function (widget) { $.widget('mage.sidebar', widget, { _updateItemQty: function (elem) { var itemId = elem.data('cart-item'); var btnplus = elem.data('btn-plus'); var btnminus = elem.data('btn-minus'); this._ajax(this.options.url.update, { 'item_id': itemId, 'item_qty': $('#cart-item-' + itemId + '-qty').val(), 'item_btn_plus': btnplus, 'item_btn_minus': btnminus }, elem, this._updateItemQtyAfter); this._customerData(); }, /** * Update content after update qty * * @param {HTMLElement} elem */ _updateItemQtyAfter: function (elem) { var productData = this._getProductById(Number(elem.data('cart-item'))); if (!_.isUndefined(productData)) { $(document).trigger('ajax:updateCartItemQty'); if (window.location.href === this.shoppingCartUrl) { window.location.reload(false); } } this._hideItemButton(elem); }, _customerData : function () { var sections = ['cart']; customerData.invalidate(sections); customerData.reload(sections, true); } }); return $.mage.sidebar; } }); 

Thanks.