utm_source view

const queryString = window.location.search;
const urlParams = new URLSearchParams(queryString);
const utm = urlParams.get('utm_source');
if (utm) {
  var myVar = utm;
}

function getCookie(cname) {
  let name = cname + "=";
  let decodedCookie = decodeURIComponent(document.cookie);
  let ca = decodedCookie.split(';');
  for(let i = 0; i <ca.length; i++) {
    let c = ca[i];
    while (c.charAt(0) == ' ') {
      c = c.substring(1);
    }
    if (c.indexOf(name) == 0) {
      return c.substring(name.length, c.length);
    }
  }
  return "";
}
zztop = getCookie('_shopify_sa_p');
const zz = new URLSearchParams(zztop);
var cook_utm = zz.get('utm_source');
if (cook_utm) {
  var myVar = cook_utm;
}

console.error('utm myVar = '+myVar);