Klar Tracking in WooCommerce

functions.php

<?php

// Klar:sendOrderEvent
add_action( 'woocommerce_thankyou', function ( $order_id ) {
	?>
    <script>
        (function () {
            window._k_q = window._k_q || [];
            window._k_q.push(["Klar:sendOrderEvent", {
                orderId: <?php echo esc_html( $order_id ); ?>,
            }]);
        })();
    </script>
	<?php
} );

// Klar:sendUpdateCheckoutEvent
add_action( 'wp_footer', function () {
	global $wp;

	// Is it the checkout page and the checkout is not completed?
	if ( is_checkout() && empty( $wp->query_vars['order-pay'] ) && ! isset( $wp->query_vars['order-received'] ) ) {
		// We don't have the cartId, checkoutId, so we just send the customer ID instead.
		$customer_id = get_current_user_id(); // Defaults to 0 if not logged in
		?>
        <script>
            (function () {
                window._k_q = window._k_q || [];
                window._k_q.push(["Klar:sendUpdateCheckoutEvent", {
                    cartId: <?php echo esc_html( $customer_id ); ?>,
                    checkoutId: <?php echo esc_html( $customer_id ); ?>,
                    customerId: <?php echo esc_html( $customer_id ); ?>
                }]);
            })();
        </script>
		<?php
	}
} );

// Klar:sendUpdateCartEvent
add_action( 'wp_footer', function () {
	// We don't have the cartId, checkoutId, so we just send the customer ID instead.
	$customer_id = get_current_user_id(); // Defaults to 0 if not logged in
	?>
    <script>
        jQuery(document).on('click', '.woocommerce-cart-form :button[type=submit]', function() {
            window._k_q = window._k_q || [];
            window._k_q.push(["Klar:sendUpdateCartEvent", {
                cartId: <?php echo esc_html( $customer_id ); ?>,
            }]);
        });

        jQuery(document).on('change', '.woocommerce-cart-form :input[type=number]', function() {
            window._k_q = window._k_q || [];
            window._k_q.push(["Klar:sendUpdateCartEvent", {
                cartId: <?php echo esc_html( $customer_id ); ?>,
            }]);
		});
    </script>
	<?php
} );