Add Google Analytics tag. Ensure proper load order and error handling.

best-cigars-guide/scripts/delayed.js

@@ -5,3 +5,43 @@ import { sampleRUM } from './aem.js';
 sampleRUM('cwv');
 
 // add more delayed functionality here
+
+function onError(tagName) {
+  /* eslint no-console: ["error", { allow: ["error"] }] */
+  console.error(`The ${tagName} script failed to load.`);
+}
+
+function onGALoad() {
+  /* global dataLayer */
+  window.dataLayer = window.dataLayer || [];
+  function gtag() {
+    // eslint-disable-next-line prefer-rest-params
+    dataLayer.push(arguments);
+  }
+  gtag('js', new Date());
+  gtag('config', 'GT-M6QM788');
+  gtag('set', 'linker', { domains: ['www.famous-smoke.com'] });
+}
+
+function loadGoogleAnalytics() {
+  // Load the Google Analytics library
+  const tag = document.createElement('script');
+  tag.async = true;
+  tag.src = 'https://www.googletagmanager.com/gtag/js?id=GT-M6QM788';
+  document.head.appendChild(tag);
+  // Configuration script
+  tag.onload = onGALoad;
+  tag.onerror = onError('Google Analytics');
+}
+
+// Check if Google Analytics is loaded
+function isGALoaded() {
+  return window.dataLayer && Array.isArray(window.dataLayer);
+}
+
+// Load Scripts
+if (window.location.hostname !== 'localhost') {
+  if (!isGALoaded()) {
+    loadGoogleAnalytics();
+  }
+}