https://dc.gov/core/misc/drupal.init.js?v=10.6.16

1// Allow other JavaScript libraries to use $.
2if (window.jQuery) {
3  jQuery.noConflict();
4}
5
6// Class indicating that JS is enabled; used for styling purpose.
7document.documentElement.className += ' js';
8
9// JavaScript should be made compatible with libraries other than jQuery by
10// wrapping it in an anonymous closure.
11(function (Drupal, drupalSettings) {
12  /**
13   * Calls callback when document ready.
14   *
15   * @param {function} callback
16   *   The function to be called on document ready.
17   */
18  const domReady = (callback) => {
19    const listener = () => {
20      callback();
21      document.removeEventListener('DOMContentLoaded', listener);
22    };
23    if (document.readyState !== 'loading') {
24      setTimeout(callback, 0);
25    } else {
26      document.addEventListener('DOMContentLoaded', listener);
27    }
28  };
29
30  // Attach all behaviors.
31  domReady(() => {
32    Drupal.attachBehaviors(document, drupalSettings);
33  });
34})(Drupal, window.drupalSettings);