uhc_utm_old.js

//get the current query string. 
const urlParams = new URLSearchParams(window.location.search);
if( urlParams.has('source') && urlParams.has('medium')  && urlParams.has('campaign')  ) {
  
  const source = urlParams.get('source');
  const medium = urlParams.get('medium');
  const campaign = urlParams.get('campaign');

  //Before ga("send", "pageview")
  //if params were found.
  ga('set', 'campaignSource', source);
  ga('set', 'campaignMedium', medium);
  ga('set', 'campaignName', campaign);

}