How to make notifications after selecting woocommerce shipping method?

Question

JavaScript

I welcome everyone.
WP shop with WC. The customer asked to move the delivery method to the beginning (before all fields). Found a way to do it here. According to this recipe . Later, a task was received to make pop-up notifications for a few seconds when a specific delivery method was selected. Worked according to this method
. The essence of the troubles: If you do not transfer the block for choosing the delivery method, notifications are displayed. And after transfer of the block does not fulfill.
What and where to look in this case?