public static function add_to_cart() {
		ob_start();

		// phpcs:disable WordPress.Security.NonceVerification.Missing
		if ( ! isset( $_POST['product_id'] ) ) {
			return;
		}

		$product_id        = apply_filters( 'woocommerce_add_to_cart_product_id', absint( $_POST['product_id'] ) );
		$product           = wc_get_product( $product_id );
		$quantity          = empty( $_POST['quantity'] ) ? 1 : wc_stock_amount( wp_unslash( $_POST['quantity'] ) );
		$passed_validation = apply_filters( 'woocommerce_add_to_cart_validation', true, $product_id, $quantity );
		$product_status    = get_post_status( $product_id );
		$variation_id      = 0;
		$variation         = array();

		if ( $product && 'variation' === $product->get_type() ) {
			$variation_id = $product_id;
			$product_id   = $product->get_parent_id();
			$variation    = $product->get_variation_attributes();
		}

		if ( $passed_validation && false !== WC()->cart->add_to_cart( $product_id, $quantity, $variation_id, $variation ) && 'publish' === $product_status ) {

			do_action( 'woocommerce_ajax_added_to_cart', $product_id );

			if ( 'yes' === get_option( 'woocommerce_cart_redirect_after_add' ) ) {
				wc_add_to_cart_message( array( $product_id => $quantity ), true );
			}

			self::get_refreshed_fragments();

		} else {

			// If there was an error adding to the cart, redirect to the product page to show any errors.
			$data = array(
				'error'       => true,
				'product_url' => apply_filters( 'woocommerce_cart_redirect_after_error', get_permalink( $product_id ), $product_id ),
			);

			wp_send_json( $data );
		}
		// phpcs:enable
	}