I would like to add a custom CSS when displaying product images. E.g. when calling the woocommerce_get_product_thumbnail function.
I've tried solutions like this: Add CSS class to every image but they don't work. The class only gets added to images that are not related to products.
If it's still relevant, you can add a class to the product thumbnail the following way.
function loop_product_custom_thumbnail() { echo the_post_thumbnail('thumbnail', array('class' => 'your-class-name')); } remove_action( 'woocommerce_before_shop_loop_item_title', 'woocommerce_template_loop_product_thumbnail', 10); add_action( 'woocommerce_before_shop_loop_item_title', 'loop_product_custom_thumbnail', 10 ); 