Script para repassar as UTMs da página para o botão de ação (CTA)

google-analytics-utms.html

<script>
document.addEventListener("DOMContentLoaded", () => {
  const urlParams = new URLSearchParams(window.location.search);
  
  const utm_source = urlParams.get("utm_source");
  const utm_medium = urlParams.get("utm_medium");
  const utm_campaign = urlParams.get("utm_campaign");
  const utm_content = urlParams.get("utm_content");
  const utm_term = urlParams.get("utm_term");
  
  const linksUtm = document.querySelectorAll(".utm");

  linksUtm.forEach((element) => {
    var a = element;
    if ("A" != element.tagName) a = element.querySelector("a");
    
    var url = new URL(a.getAttribute("href"));

    if (utm_source) url.searchParams.set('utm_source', utm_source);
    if (utm_medium) url.searchParams.set('utm_medium', utm_medium);
    if (utm_campaign) url.searchParams.set('utm_campaign', utm_campaign);
    if (utm_content) url.searchParams.set('utm_content', utm_content);
    if (utm_term) url.searchParams.set('utm_term', utm_term);

    a.setAttribute("href", url.href);
  });
});
</script>