UTM PERSISTANCE

<script>
  function getUTMParameters() {
    const queryString = window.location.search;
    const urlParams = new URLSearchParams(queryString);
    const utmParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content'];

    const utmData = {};
    utmParams.forEach(param => {
      if (urlParams.has(param)) {
        utmData[param] = urlParams.get(param);
      }
    });

    return utmData;
  }

  function storeUTMParameters(utmData) {
    sessionStorage.setItem('utmData', JSON.stringify(utmData));
  }

  function getStoredUTMParameters() {
    const storedData = sessionStorage.getItem('utmData');
    return storedData ? JSON.parse(storedData) : null;
  }

  function appendUTMParametersToLinks(utmData) {
    const links = document.querySelectorAll('a');

    links.forEach(link => {
      const url = new URL(link.href);
      for (const [key, value] of Object.entries(utmData)) {
        url.searchParams.set(key, value);
      }
      link.href = url.toString();
    });
  }

  document.addEventListener('DOMContentLoaded', () => {
    const utmData = getUTMParameters();
    if (Object.keys(utmData).length > 0) {
      storeUTMParameters(utmData);
    }

    const storedUTMData = getStoredUTMParameters();
    if (storedUTMData) {
      appendUTMParametersToLinks(storedUTMData);
    }
  });
</script>