define([
    'jquery',
    'Magento_Customer/js/customer-data'
], function ($, customerData) {
    'use strict';

    const cartData = customerData.get('cart');

    function updateBodyClass() {
        const data = cartData();
        const discount = data.total_discount_amount;

        if (typeof discount !== 'undefined' && discount > 0) {
            $('.modal-minicart').addClass('has-minicart-discount');
        } else {
            $('.modal-minicart').removeClass('has-minicart-discount');
        }
    }

    updateBodyClass();
    cartData.subscribe(updateBodyClass);
});