D8_rplf/core/misc/drupalSettingsLoader.js

/**
 * @file
 * Parse inline JSON and initialize the drupalSettings global object.
 */

(function () {

  'use strict';

  // Use direct child elements to harden against XSS exploits when CSP is on.
  var settingsElement = document.querySelector('head > script[type="application/json"][data-drupal-selector="drupal-settings-json"], body > script[type="application/json"][data-drupal-selector="drupal-settings-json"]');

  /**
   * Variable generated by Drupal with all the configuration created from PHP.
   *
   * @global
   *
   * @type {object}
   */
  window.drupalSettings = {};

  if (settingsElement !== null) {
    window.drupalSettings = JSON.parse(settingsElement.textContent);
  }
})();