https://www.nemetschek.in/themes/custom/Nemetschek/js/attach-form-utm.js?v=11.2.3

1(function (Drupal) {
2  Drupal.behaviors.setUTMReferralFields = {
3    attach: function (context, settings) {
4
5      // Helper to get a cookie by name
6      function getCookie(name) {
7        const value = `; ${document.cookie}`;
8        const parts = value.split(`; ${name}=`);
9        if (parts.length === 2) return parts.pop().split(';').shift();
10      }
11
12      // Get cookies once
13      const referral = getCookie('nemetschek_referral') || '';
14      const utmSource = getCookie('nemetschek_utm_source') || '';
15      const utmMedium = getCookie('nemetschek_utm_medium') || '';
16      const utmCampaign = getCookie('nemetschek_utm_campaign') || '';
17
18      // Function to set a field if it exists in current context
19      function setFieldValue(name, value) {
20        const input = context.querySelector(`input[name="${name}"]`);
21        if (input && !input.dataset.utmSet) {
22          input.value = value;
23          input.dataset.utmSet = 'true';
24          console.log(`✓ Set ${name} to: "${value}"`);
25          return true;
26        }
27        return false;
28      }
29
30      // Try to set all fields in current context
31      setFieldValue('referral', referral);
32      setFieldValue('utm_source', utmSource);
33      setFieldValue('utm_medium', utmMedium);
34      setFieldValue('utm_campaign', utmCampaign);
35    }
36  };
37})(Drupal);