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resources/scripts/builtin_js/observer.js

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+// Watch entire document and keep date of last DOM change.
+const targetNode = document;
+const waitTimeMs = 5000;
+const idleIdString = "iiddllee";
+
+var scrollings = 3;
+var lastResourceTime = new Date();
+
+// Setup DOM observer and observe for changes in elements only.
+const config = { attributes: false, characterData: false, childList: true, subtree: true };
+
+const callback = (mutationList, observer) => {
+  lastResourceTime = new Date();
+  console.log("res " + lastResourceTime);
+};
+
+const observer = new MutationObserver(callback);
+
+observer.observe(targetNode, config);
+
+var intervalId = window.setInterval(function () {
+  var actualTime = new Date();
+
+  if ((actualTime - lastResourceTime) > waitTimeMs) {
+    if (scrollings > 0) {
+      // Just scroll to bottom of current DOM
+      // to make sure more content is loaded.
+      scrollings = scrollings - 1;
+      lastResourceTime = new Date();
+      window.scrollTo(0, document.body.scrollHeight);
+      console.log("scroll");
+    }
+    else {
+      console.log(idleIdString);
+      clearInterval(intervalId);
+    }
+  }
+}, 1100);