https://www.sec.gov/modules/contrib/google_tag/js/gtm.js?tlkvr5

1const dl = drupalSettings.gtm ? drupalSettings.gtm.settings.data_layer : 'dataLayer';
2window[dl] = window[dl] || [];
3
4(function (drupalSettings) {
5  if (!drupalSettings.gtm) {return;}
6  const config = drupalSettings.gtm;
7
8  window[dl].push({ 'gtm.start': new Date().getTime(), event: 'gtm.js' });
9  const gtmSettings = config.settings;
10  if (gtmSettings.include_classes === true) {
11    window[dl].push({
12      'gtm.allowlist': gtmSettings.allowlist_classes ?? [],
13      'gtm.blocklist': gtmSettings.blocklist_classes ?? [],
14    });
15  }
16
17  let gtm_environment = '';
18  if (gtmSettings.include_environment === true) {
19    const gtm_auth = gtmSettings.environment_token ?? '';
20    const gtm_preview = gtmSettings.environment_id ?? '';
21    gtm_environment = `&gtm_auth=${gtm_auth}&gtm_preview=${gtm_preview}&gtm_cookies_win=x`;
22  }
23  config.tagIds.forEach(function (tagId) {
24    const script = document.createElement('script');
25    script.async = true;
26    const dLink = dl != 'dataLayer' ? `&l=${dl}` : '';
27    script.src = `https://www.googletagmanager.com/gtm.js?id=${tagId}${gtm_environment}${dLink}`;
28    script.type = 'text/javascript';
29    document.getElementsByTagName('head')[0].appendChild(script);
30  });
31})(drupalSettings);