newsupernova/vendor/magento/module-checkout/view/frontend/web/js/action/get-totals.js

/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

/**
 * @api
 */
define([
    'jquery',
    '../model/quote',
    'Magento_Checkout/js/model/resource-url-manager',
    'Magento_Checkout/js/model/error-processor',
    'mage/storage',
    'Magento_Checkout/js/model/totals'
], function ($, quote, resourceUrlManager, errorProcessor, storage, totals) {
    'use strict';

    return function (callbacks, deferred) {
        deferred = deferred || $.Deferred();
        totals.isLoading(true);

        return storage.get(
            resourceUrlManager.getUrlForCartTotals(quote),
            false
        ).done(function (response) {
            var proceed = true;

            totals.isLoading(false);

            if (callbacks.length > 0) {
                $.each(callbacks, function (index, callback) {
                    proceed = proceed && callback();
                });
            }

            if (proceed) {
                quote.setTotals(response);
                deferred.resolve();
            }
        }).error(function (response) {
            totals.isLoading(false);
            deferred.reject();
            errorProcessor.process(response);
        }).always(function () {
            totals.isLoading(false);
        });
    };
});