Read Promobanner from Spreadshop

<html>

<head>
  <script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
  <script>
    jQuery(function($) {
      const readPromo = (successCallback, failedCallback) => {
        const asinUrl = 'https://shop.spreadshirt.de/welovetee';
        if (asinUrl.length > 0) {
          // Get Sales Rank
          $.get(asinUrl, (res) => {
            const doc = $(res);
            let rank = doc.find('.sprd-promo-header');
            successCallback(rank);
          });
        } else if (typeof failedCallback === 'function') {
          failedCallback();
        }
      };
      // Call function
      readPromo(
        (r) => {
          if (r.length > 0) {
            $('#spreadshop-promo-banner').append(`<td><div class="prdm-expandable">${r.html()}</div></td>`);
          }
        });
    })
  </script>
</head>

<body>
  <div id="spreadshop-promo-banner"></div>
</body>

</html>