Como ativar o AJAX para o botão 'Adicionar ao carrinho' de widgets de produtos no Magento 2?

No Magento 2, o Add to Cartbotão normal possui uma lógica muito boa baseada em AJAX para adicionar produtos ao carrinho.
No entanto, quando usamos um Catalog Products Listwidget, por exemplo, nas páginas do CMS, o botão nesta lista de produtos funciona com um HTTP POSTque recarrega a página atual.

A experiência do usuário sofre com isso e seria desejável que o botão tivesse a mesma lógica AJAX como nas listas de produtos da categoria padrão ou nas páginas de produtos.

Como podemos estender o Catalog Products Listwidget para que ele use o botão melhor Add to Cart ? Ou talvez haja outra solução alternativa?

Você precisa substituir o arquivo addtocart.phtml

app/design/frontend/vendorname/themename/Magento_Catalog/templates/product/view/addtocart.phtml

Agora basta substituir "bindSubmit": false para "bindSubmit": true

<script type="text/x-magento-init">
    {
        "#product_addtocart_form": {
            "catalogAddToCart": {
                "bindSubmit": false
            }
        }
    }
</script>

Para

<script type="text/x-magento-init">
    {
        "#product_addtocart_form": {
            "catalogAddToCart": {
                "bindSubmit": true
            }
        }
    }
</script>

Agora exclua o cache e a pasta page_cache ou limpe o cache.

Nota: Certifique-se de definir Não de Store->Configuration->Sales->Checkout->Shopping Cart->After Adding a Product Redirect to Shopping Cart to No

Você pode estender o Catalog Products Listpara usar o carrinho ajax criando um módulo com os seguintes arquivos:

/Your/Module/Block/Product/ListBlock.php com conteúdo:

<?php

namespace Your\Module\Block\Product;


use Magento\CatalogWidget\Block\Product\ProductsList;

class ListBlock extends ProductsList
{
    /**
     * @var \Magento\Framework\Url\Helper\Data
     */
    protected $urlHelper;

    public function __construct(
        \Magento\Catalog\Block\Product\Context $context,
        \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory,
        \Magento\Catalog\Model\Product\Visibility $catalogProductVisibility,
        \Magento\Framework\App\Http\Context $httpContext,
        \Magento\Rule\Model\Condition\Sql\Builder $sqlBuilder,
        \Magento\CatalogWidget\Model\Rule $rule,
        \Magento\Widget\Helper\Conditions $conditionsHelper,
        \Magento\Framework\Url\Helper\Data $urlHelper,
        array $data
    )
    {
        $this->urlHelper = $urlHelper;

        parent::__construct($context, $productCollectionFactory, $catalogProductVisibility, $httpContext, $sqlBuilder, $rule, $conditionsHelper, $data);
    }

    /**
     * Get post parameters
     *
     * @param \Magento\Catalog\Model\Product $product
     * @return string
     */
    public function getAddToCartPostParams(\Magento\Catalog\Model\Product $product)
    {
        $url = $this->getAddToCartUrl($product);
        return [
            'action' => $url,
            'data' => [
                'product' => $product->getEntityId(),
                \Magento\Framework\App\ActionInterface::PARAM_NAME_URL_ENCODED =>
                    $this->urlHelper->getEncodedUrl($url),
            ]
        ];
    }
}

Seu / Module / etc / widget.xml com conteúdo:

<widgets xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Widget:etc/widget.xsd">
    <widget id="ajax_products_list" class="Your\Module\Block\Product\ListBlock" is_email_compatible="true"
            placeholder_image="Magento_CatalogWidget::images/products_list.png" ttl="86400">
        <label translate="true">Ajax Catalog Products List</label>
        <description translate="true">List of Products with Ajax Cart</description>
        <parameters>
            <parameter name="title" xsi:type="text" required="false" visible="true">
                <label translate="true">Title</label>
            </parameter>
            <parameter name="show_pager" xsi:type="select" visible="true"
                       source_model="Magento\Config\Model\Config\Source\Yesno">
                <label translate="true">Display Page Control</label>
            </parameter>
            <parameter name="products_per_page" xsi:type="text" required="true" visible="true">
                <label translate="true">Number of Products per Page</label>
                <depends>
                    <parameter name="show_pager" value="1" />
                </depends>
                <value>5</value>
            </parameter>
            <parameter name="products_count" xsi:type="text" required="true" visible="true">
                <label translate="true">Number of Products to Display</label>
                <value>10</value>
            </parameter>
            <parameter name="template" xsi:type="select" required="true" visible="true">
                <label translate="true">Template</label>
                <options>
                    <option name="default" value="Your_Module::product/widget/content/grid.phtml" selected="true">
                        <label translate="true">Products Grid Template</label>
                    </option>
                </options>
            </parameter>
            <parameter name="cache_lifetime" xsi:type="text" visible="true">
                <label translate="true">Cache Lifetime (Seconds)</label>
                <description translate="true">86400 by default, if not set. To refresh instantly, clear the Blocks HTML Output cache.</description>
            </parameter>
            <parameter name="condition" xsi:type="conditions" visible="true" required="true" sort_order="10"
                       class="Magento\CatalogWidget\Block\Product\Widget\Conditions">
                <label translate="true">Conditions</label>
            </parameter>
        </parameters>
        <containers>
            <container name="content">
                <template name="grid" value="default" />
            </container>
            <container name="content.top">
                <template name="grid" value="default" />
            </container>
            <container name="content.bottom">
                <template name="grid" value="default" />
            </container>
        </containers>
    </widget>
</widgets>

E finalmente, seu / Module / view / frontend / templates / product / widget / content / grid.phtml com o conteúdo:

<?php

// @codingStandardsIgnoreFile
use Magento\Framework\App\Action\Action;
?>
<?php
/**
 * Template for displaying products list widget
 *
 * @var $block \Your\Module\Block\Product\ListBlock
 */
?>
<?php if ($exist = ($block->getProductCollection() && $block->getProductCollection()->getSize())):?>
<?php
    $type = 'widget-product-grid';

    $mode = 'grid';

    $image = 'new_products_content_widget_grid';
    $title = $block->getTitle() ? __($block->getTitle()) : '';
    $products = $block->getProductCollection()->getItems();
    $_helper = $this->helper('Magento\Catalog\Helper\Output');

    $showWishlist = true;
    $showCompare = true;
    $showCart = true;
    $templateType = \Magento\Catalog\Block\Product\ReviewRendererInterface::DEFAULT_VIEW;
    $showDescription = false;
?>
    <div class="block widget block-products-list <?php /* @escapeNotVerified */ echo $mode; ?>">
        <?php if ($title):?>
        <div class="block-title">
            <strong><?php /* @escapeNotVerified */ echo $title; ?></strong>
        </div>
        <?php endif ?>
        <div class="block-content">
            <?php /* @escapeNotVerified */ echo '<!-- ' . $image . '-->' ?>
            <div class="products-<?php /* @escapeNotVerified */ echo $mode; ?> <?php /* @escapeNotVerified */ echo $mode; ?>">
                <ol class="product-items <?php /* @escapeNotVerified */ echo $type; ?>">
                    <?php $iterator = 1; ?>
                    <?php /** @var \Magento\Catalog\Model\Product $_product */ ?>
                    <?php foreach ($products as $_product): ?>
                        <?php /* @escapeNotVerified */ echo($iterator++ == 1) ? '<li class="product-item">' : '</li><li class="product-item">' ?>
                        <div class="product-item-info" data-container="product-grid">
                            <?php
                            $productImage = $block->getImage($_product, $image);
                            ?>
                            <?php // Product Image ?>
                            <a href="<?php /* @escapeNotVerified */ echo $_product->getProductUrl() ?>" class="product photo product-item-photo" tabindex="-1">
                                <?php echo $productImage->toHtml(); ?>
                            </a>
                            <div class="product details product-item-details">
                                <?php
                                $_productNameStripped = $block->stripTags($_product->getName(), null, true);
                                ?>
                                <strong class="product name product-item-name">
                                    <a class="product-item-link"
                                       href="<?php /* @escapeNotVerified */ echo $_product->getProductUrl() ?>">
                                        <?php /* @escapeNotVerified */ echo $_helper->productAttribute($_product, $_product->getName(), 'name'); ?>
                                    </a>
                                </strong>
                                <?php echo $block->getReviewsSummaryHtml($_product, $templateType); ?>
                                <?php /* @escapeNotVerified */ echo $block->getProductPrice($_product) ?>
                                <?php echo $block->getProductDetailsHtml($_product); ?>

                                <div class="product-item-inner">
                                    <div class="product actions product-item-actions">
                                        <div class="actions-primary">
                                            <?php if ($_product->isSaleable()): ?>
                                                <?php $postParams = $block->getAddToCartPostParams($_product); ?>
                                                <form data-role="tocart-form" action="<?php /* @escapeNotVerified */ echo $postParams['action']; ?>" method="post">
                                                    <input type="hidden" name="product" value="<?php /* @escapeNotVerified */ echo $postParams['data']['product']; ?>">
                                                    <input type="hidden" name="<?php /* @escapeNotVerified */ echo Action::PARAM_NAME_URL_ENCODED; ?>" value="<?php /* @escapeNotVerified */ echo $postParams['data'][Action::PARAM_NAME_URL_ENCODED]; ?>">
                                                    <?php echo $block->getBlockHtml('formkey')?>
                                                    <button type="submit"
                                                            title="<?php echo $block->escapeHtml(__('Add to Cart')); ?>"
                                                            class="action tocart primary">
                                                        <span><?php /* @escapeNotVerified */ echo __('Add to Cart') ?></span>
                                                    </button>
                                                </form>
                                            <?php else: ?>
                                                <?php if ($_product->getIsSalable()): ?>
                                                    <div class="stock available"><span><?php /* @escapeNotVerified */ echo __('In stock') ?></span></div>
                                                <?php else: ?>
                                                    <div class="stock unavailable"><span><?php /* @escapeNotVerified */ echo __('Out of stock') ?></span></div>
                                                <?php endif; ?>
                                            <?php endif; ?>
                                        </div>
                                        <div data-role="add-to-links" class="actions-secondary">
                                            <?php if ($this->helper('Magento\Wishlist\Helper\Data')->isAllow()): ?>
                                                <a href="#"
                                                   class="action towishlist"
                                                   title="<?php echo $block->escapeHtml(__('Add to Wish List')); ?>"
                                                   aria-label="<?php echo $block->escapeHtml(__('Add to Wish List')); ?>"
                                                   data-post='<?php /* @escapeNotVerified */ echo $block->getAddToWishlistParams($_product); ?>'
                                                   data-action="add-to-wishlist"
                                                   role="button">
                                                    <span><?php /* @escapeNotVerified */ echo __('Add to Wish List') ?></span>
                                                </a>
                                            <?php endif; ?>
                                            <?php
                                            $compareHelper = $this->helper('Magento\Catalog\Helper\Product\Compare');
                                            ?>
                                            <a href="#"
                                               class="action tocompare"
                                               title="<?php echo $block->escapeHtml(__('Add to Compare')); ?>"
                                               aria-label="<?php echo $block->escapeHtml(__('Add to Compare')); ?>"
                                               data-post='<?php /* @escapeNotVerified */ echo $compareHelper->getPostDataParams($_product); ?>'
                                               role="button">
                                                <span><?php /* @escapeNotVerified */ echo __('Add to Compare') ?></span>
                                            </a>
                                        </div>
                                    </div>
                                    <?php if ($showDescription):?>
                                        <div class="product description product-item-description">
                                            <?php /* @escapeNotVerified */ echo $_helper->productAttribute($_product, $_product->getShortDescription(), 'short_description') ?>
                                            <a href="<?php /* @escapeNotVerified */ echo $_product->getProductUrl() ?>" title="<?php /* @escapeNotVerified */ echo $_productNameStripped ?>"
                                               class="action more"><?php /* @escapeNotVerified */ echo __('Learn More') ?></a>
                                        </div>
                                    <?php endif; ?>
                                </div>
                            </div>
                        </div>
                        <?php echo($iterator == count($products)+1) ? '</li>' : '' ?>
                    <?php endforeach ?>
                </ol>
            </div>
            <?php echo $block->getPagerHtml() ?>
        </div>
    </div>
    <?php if (!$block->isRedirectToCartEnabled()) : ?>
        <script type="text/x-magento-init">
        {
            "[data-role=tocart-form], .form.map.checkout": {
                "catalogAddToCart": {}
            }
        }
        </script>
    <?php endif; ?>
<?php endif;?>

Certifique-se de substituir todas as instâncias do 'Your \ Module' pelos seus próprios namespaces.

No Magento 2.2, o Magento_Catalog/product/view/validationscript é chamado em vez de catalogAddToCart.

Isso já está presente em addtocart.phtml(com a radioCheckboxClosestopção de configuração), portanto, para ativar o Ajax Add to Cart, basta adicionar a bindSubmitopção da seguinte forma:

<script type="text/x-magento-init">
{
    "#product_addtocart_form": {
        "Magento_Catalog/product/view/validation": {
            "bindSubmit": true,
            "radioCheckboxClosest": ".nested"
        }
    }
}
</script>

Nos últimos lançamentos do Magento 2, isso foi alterado novamente e agora é

<script type="text/x-magento-init">
    {
        "#product_addtocart_form": {
            "Magento_Catalog/js/validate-product": {
                "bindSubmit": true
            }
        }
    }
</script>

Solução para Magento 2.3

Para a lista de produtos do catálogo de widgets:

Você deve encontrar o modelo do widget, neste caso, é

widget-catálogo-de-módulos / view / frontend / templates / produto / widget / content / grid.phtml

e insira este código:

<script type="text/x-magento-init">
    {
        "[data-role=tocart-form], .form.map.checkout": {
            "catalogAddToCart": {}
        }
    }
</script>