Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/statistics/statistics.js

@@ -0,0 +1,18 @@
+/**
+ * @file
+ * Statistics functionality.
+ */
+
+(function ($, Drupal, drupalSettings) {
+
+  "use strict";
+
+  $(document).ready(function () {
+    $.ajax({
+      type: "POST",
+      cache: false,
+      url: drupalSettings.statistics.url,
+      data: drupalSettings.statistics.data
+    });
+  });
+})(jQuery, Drupal, drupalSettings);