Google Sheets script to fetch Alexa ranks

import-alexa.js

const formatCommas = (num) => num.replace(/\B(?=(\d{3})+(?!\d))/g, ',');

/**
 * @customfunction
 */
function IMPORTALEXA(url) {
  var output = '';
  var fetchedUrl = UrlFetchApp.fetch(
    'https://www.alexa.com/siteinfo/' + url,
    { muteHttpExceptions: true }
  );
  if (fetchedUrl) {
    var html = fetchedUrl.getContentText();
    if (html.length) {
      output = formatCommas(
        html.split('global": ')[1].split(',')[0]
      );
    }
  }
  Utilities.sleep(1000);
  return output;
}