Setting intersect observer to detect visibility and added delay.

ignite-template.js

@@ -965,7 +965,7 @@ class IgniteTemplate {
                 if (results[0].isIntersecting) {
                     this._intersectObserverCallback.forEach(callback => callback(results[0]));
                 }
-            }, { root: null});
+            }, { root: null, trackVisibility: true, delay: 1000 });
             this._intersectObserver.observe(this.element);
         }