https://www.geaerospace.com/news/themes/custom/aero_unified/src/js/overrides/ajax.js?tm35rv

1/**
2 * @file
3 * Defines ajax throbber theme functions.
4 * Credit to: Pierre Dureau (pdureau) for the initial code.
5 */
6
7((Drupal) => {
8  /**
9   * An animated progress throbber and container element for AJAX operations.
10   *
11   * @param {string} [message]
12   *   (optional) The message shown on the UI.
13   * @return {string}
14   *   The HTML markup for the throbber.
15   */
16  Drupal.theme.ajaxProgressThrobber = (message) => {
17    // Build markup without adding extra white space since it affects rendering.
18    const messageMarkup =
19      typeof message === 'string'
20        ? Drupal.theme('ajaxProgressMessage', message)
21        : '';
22
23    if (messageMarkup === '') {
24      const defaultMessage = Drupal.t('Loading...');
25      return `<div class="ajax-progress ajax-progress-throbber">
26        <div class="spinner-border spinner-border-sm" role="status">
27          <span class="visually-hidden">${defaultMessage}</span>
28        </div>
29      </div>`;
30    }
31
32    return `<div class="ajax-progress ajax-progress-throbber">
33      <span class="spinner-border spinner-border-sm" aria-hidden="true"></span>
34      ${messageMarkup}
35    </div>`;
36  };
37
38  /**
39   * Formats text accompanying the AJAX progress throbber.
40   *
41   * @param {string} message
42   *   The message shown on the UI.
43   * @return {string}
44   *   The HTML markup for the throbber.
45   */
46  Drupal.theme.ajaxProgressMessage = (message) =>
47    `<span role="status">${message}</span>`;
48})(Drupal);