drupal/core/modules/statistics/statistics.js

(function ($, Drupal, drupalSettings) {

  "use strict";

  $(document).ready(function() {
    $.ajax({
      type: "POST",
      cache: false,
      url: drupalSettings.statistics.url,
      data: drupalSettings.statistics.data
    });
  });
})(jQuery, Drupal, drupalSettings);