Install on Google Tag Manager

<!--
  VeritaMetrics: Google Tag Manager Custom HTML Tag

  Install: Create a new "Custom HTML" tag in GTM, paste this code,
  and set the trigger to "All Pages" (or your preferred trigger).

  After installing this base tag, you can track custom events and
  revenue from other GTM tags using:

    window.verita('trackEvent', 'event_name', { key: 'value' });

    window.verita('trackRevenue', {
      orderId: 'ORDER-123',
      amount: 49.99,
      currency: 'USD',
      products: ['product-a', 'product-b']
    });
-->
<script>
  (function () {
    if (typeof window === 'undefined' || typeof document === 'undefined') return;

    var siteId = 'YOUR-SITE-ID';
    var trackingDomain = 'www.veritametrics.com';

    // 1. Initialize the async command queue
    window.verita =
      window.verita ||
      function () {
        (window.verita.q = window.verita.q || []).push(arguments);
      };
    window.verita.l = new Date().getTime();

    // 2. Load the tracker script
    var script = document.createElement('script');
    script.src = 'https://' + trackingDomain + '/api/tracker.js?siteId=' + siteId;
    script.async = true;
    script.defer = true;
    script.dataset.siteId = siteId;
    script.dataset.trackingDomain = trackingDomain;
    document.head.appendChild(script);

    // 3. Send initial pageview
    window.verita('trackPageView');
  })();
</script>