Manipulate with checkout discount area using Shopify Checkout library + js modules assets

shopify-checkout.liquid

{%- comment -%}
https://www.npmjs.com/package/@adearriba/shopify-checkout?activeTab=code
{%- endcomment -%}
<script type="module" src="{{ 'shopify-checkout.js' | asset_url }}"></script>

<script>
  import { $checkout } from './shopify-checkout.js';
  $checkout.on('load', (e) => {
    console.log(e); 
    let discountNumberLineEl = document.querySelector('[data-checkout-discount-amount-target]');
    let discountTotalTargets = document.querySelectorAll('.discountTotal');
    if (discountTotalTargets) {
      setTimeout(() => {
        const discountSuccessMessageTarget1 = document.querySelector('.checkout-breadcrumbs');
        if (discountSuccessMessageTarget1 &&  ! discountSuccessMessageTarget1.querySelector('.discountSuccessMessageRoot')) {
          discountSuccessMessageTarget1.appendChild(discountSuccessMessageRoot.cloneNode(true));
        }
        handleDiscountSuccessMessage(discountNumberLineEl, discountTotalTargets);
      }, 500);
    }
  });
</script>