si vous souhaitez ajouter votre attribut personnalisé dans le résumé de la commande, vous devez remplacer: (Layouts) 1) checkout_cart_index:
<referenceBlock name="checkout.cart.totals">
        <arguments>
            <argument name="jsLayout" xsi:type="array">
                <item name="components" xsi:type="array">
                    <item name="block-totals" xsi:type="array">
                        <item name="children" xsi:type="array">
                            <item name="processingfee" xsi:type="array">
                                <item name="component"  xsi:type="string">Dedicated_Processingfee/js/view/checkout/cart/totals/processingfee</item>
                                <item name="sortOrder" xsi:type="string">20</item>
                                <item name="config" xsi:type="array">
                                    <item name="template" xsi:type="string">Dedicated_Processingfee/checkout/cart/totals/processingfee</item>
                                    <item name="title" xsi:type="string" translate="true">Processing Fee</item>
                                </item>
                            </item>
                        </item>
                    </item>
                </item>
            </argument>
        </arguments>
    </referenceBlock>
2) checkout_index_index:
<referenceBlock name="checkout.root">
        <arguments>
            <argument name="jsLayout" xsi:type="array">
                <item name="components" xsi:type="array">
                    <item name="checkout" xsi:type="array">
                        <item name="children" xsi:type="array">
                            <item name="sidebar" xsi:type="array">
                                <item name="children" xsi:type="array">
                                    <item name="summary" xsi:type="array">
                                        <item name="children" xsi:type="array">
                                            <item name="totals" xsi:type="array">
                                                <item name="children" xsi:type="array">
                                                    <item name="processingfee" xsi:type="array">
                                                        <item name="component"  xsi:type="string">Dedicated_Processingfee/js/view/checkout/cart/totals/processingfee</item>
                                                        <item name="sortOrder" xsi:type="string">20</item>
                                                        <item name="config" xsi:type="array">
                                                            <item name="template" xsi:type="string">Dedicated_Processingfee/checkout/cart/totals/processingfee</item>
                                                            <item name="title" xsi:type="string" translate="true">Processing Fee</item>
                                                        </item>
                                                    </item>
                                                </item>
                                            </item>
                                            <item name="cart_items" xsi:type="array">
                                                <item name="children" xsi:type="array">
                                                    <item name="details" xsi:type="array">
                                                        <item name="children" xsi:type="array">
                                                            <item name="subtotal" xsi:type="array">
                                                                <item name="component" xsi:type="string">Magento_Tax/js/view/checkout/summary/item/details/subtotal</item>
                                                            </item>
                                                        </item>
                                                    </item>
                                                </item>
                                            </item>
                                        </item>
                                    </item>
                                </item>
                            </item>
                        </item>
                    </item>
                </item>
            </argument>
        </arguments>
    </referenceBlock>
3) sales_order_view:
<referenceContainer name="order_totals">
        <block class="Dedicated\Processingfee\Block\Sales\Order\ProcessingFee" name="processingfee"/>
    </referenceContainer>
puis ajoutez des js personnalisés pour obtenir votre valeur d'attribut personnalisé comme ceci dans votre module: à /view/frontend/web/js/view/checkout/cart/totals/processingfee.js:
define(
[
    'Dedicated_Processingfee/js/view/checkout/summary/processingfee'
],
function (Component) {
    'use strict';
    return Component.extend({
        /**
        * @override
        */
        isDisplayed: function () {
            return true;
        }
    });
}
);
ajoutez un autre js pour calculer la valeur avec le montant total de la facturation dans: /view/frontend/web/js/view/checkout/summary/processingfee.js
define(
[
    'Magento_Checkout/js/view/summary/abstract-total',
    'Magento_Checkout/js/model/quote',
    'Magento_Catalog/js/price-utils',
    'Magento_Checkout/js/model/totals'
],
function (Component, quote, priceUtils, totals) {
    "use strict";
    return Component.extend({
        defaults: {
            isFullTaxSummaryDisplayed: window.checkoutConfig.isFullTaxSummaryDisplayed || false,
            template: 'Dedicated_Processingfee/checkout/summary/processingfee'
        },
        totals: quote.getTotals(),
        isTaxDisplayedInGrandTotal: window.checkoutConfig.includeTaxInGrandTotal || false,
        isDisplayed: function() {
            return this.isFullMode();
        },
        getValue: function() {
            var price = 0;
            if (this.totals()) {
                price = totals.getSegment('processingfee').value;
            }
            return this.getFormattedPrice(price);
        },
        getBaseValue: function() {
            var price = 0;
            if (this.totals()) {
                price = this.totals().base_fee;
            }
            return priceUtils.formatPrice(price, quote.getBasePriceFormat());
        }
    });
}
);
Cet ensemble, vous trouverez votre attribut avec une valeur Merci :)
