core/misc/drupalSettingsLoader.js


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

(function () {
  // Use direct child elements to harden against XSS exploits when CSP is on.
  const 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);
  }
})();