add all woocommerce product categories to body_class

product_category_body_classes.php

<?php

// add all woocommerce product categories to body_class
function product_category_body_classes( $classes ){
	if( is_singular( 'product' ) || is_tax( 'product_cat' ) ) {
		foreach (get_the_terms(0, 'product_cat') as $custom_term) {
			do {
				$classes[] = 'product-category-' . $custom_term->slug;
				//if( is_singular( 'product' ) ) {
					$classes[] = 'term-' . $custom_term->term_id;
				//}

				// Get the parent product category:
				$custom_term =  $custom_term->parent ? get_term( $custom_term->parent, 'product_cat' ) : null;
				//var_dump($custom_term);

			} while ($custom_term);
		}
	}
	
	return $classes;
}
add_filter( 'body_class', 'product_category_body_classes' );