Stripped down, minimalist product classes

content-product.php

<?php
/**
 * The template for displaying product content within loops
 *
 * This template can be overridden by copying it to yourtheme/woocommerce/content-product.php.
 *
 * HOWEVER, on occasion WooCommerce will need to update template files and you
 * (the theme developer) will need to copy the new files to your theme to
 * maintain compatibility. We try to do this as little as possible, but it does
 * happen. When this occurs the version of the template file will be bumped and
 * the readme will list any important changes.
 *
 * @see     https://woocommerce.com/document/template-structure/
 * @package WooCommerce\Templates
 * @version 9.4.0
 */

defined( 'ABSPATH' ) || exit;

global $product;

// Check if the product is a valid WooCommerce product and ensure its visibility before proceeding.
if ( ! is_a( $product, WC_Product::class ) || ! $product->is_visible() ) {
	return;
}

?>
<li <?php backcourt_product_class( '', $product ); ?>>
	<?php
	/**
	 * Hook: woocommerce_before_shop_loop_item.
	 *
	 * @hooked woocommerce_template_loop_product_link_open - 10
	 */
	do_action( 'woocommerce_before_shop_loop_item' );

	/**
	 * Hook: woocommerce_before_shop_loop_item_title.
	 *
	 * @hooked woocommerce_show_product_loop_sale_flash - 10
	 * @hooked woocommerce_template_loop_product_thumbnail - 10
	 */
	do_action( 'woocommerce_before_shop_loop_item_title' );

	/**
	 * Hook: woocommerce_shop_loop_item_title.
	 *
	 * @hooked woocommerce_template_loop_product_title - 10
	 */
	do_action( 'woocommerce_shop_loop_item_title' );

	/**
	 * Hook: woocommerce_after_shop_loop_item_title.
	 *
	 * @hooked woocommerce_template_loop_rating - 5
	 * @hooked woocommerce_template_loop_price - 10
	 */
	do_action( 'woocommerce_after_shop_loop_item_title' );

	/**
	 * Hook: woocommerce_after_shop_loop_item.
	 *
	 * @hooked woocommerce_template_loop_product_link_close - 5
	 * @hooked woocommerce_template_loop_add_to_cart - 10
	 */
	do_action( 'woocommerce_after_shop_loop_item' );
	?>
</li>

template-functions.php

<?php
/**
 * Stripped down product classes
 * 
 * Drop in replacement for wc_product_class()
 *
 * @param string|array           $class      One or more classes to add to the class list.
 * @param int|WP_Post|WC_Product $product_id Product ID or product object.
 * @return string
 */
function backcourt_product_class( $class = '', $product = null ) {

    if ( is_null( $product ) && ! empty( $GLOBALS['product'] ) ) {
		// Product was null so pull from global.
		$product = $GLOBALS['product'];
	}

	if ( $product && ! is_a( $product, 'WC_Product' ) ) {
		// Make sure we have a valid product, or set to false.
		$product = wc_get_product( $product );
	}

	if ( $class ) {
		if ( ! is_array( $class ) ) {
			$class = preg_split( '#\s+#', $class );
		}
	} else {
		$class = array();
	}

	$classes = array_map( 'esc_attr', $class );

	if ( $product ) {

		$classes = array_merge(
            $classes,
            array(
                'product',
                'type-product',
                'post-' . $product->get_id(),
                'status-' . $product->get_status(),
                wc_get_loop_class(),
                $product->get_stock_status(),
            ),
        );

        if ( $product->get_type() ) {
            $classes[] = 'product-type-' . $product->get_type();
        }
	}

    echo 'class="' . esc_attr( implode( ' ', $classes ) ) . '"';

}