https://www.ajman.ae/themes/contrib/bootstrap/js/misc/autocomplete.js?tlr1y8

1/**
2 * @file
3 * Extends autocomplete based on jQuery UI.
4 *
5 * @todo Remove once jQuery UI is no longer used?
6 */
7
8(function ($, Drupal) {
9  'use strict';
10
11  // Ensure the input element has a "change" event triggered. This is important
12  // so that summaries in vertical tabs can be updated properly.
13  // @see Drupal.behaviors.formUpdated
14  $(document).on('autocompleteselect', '.form-autocomplete', function (e) {
15    $(e.target).trigger('change.formUpdated');
16  });
17
18  // Extend ui.autocomplete widget so it triggers the glyphicon throbber.
19  $.widget('ui.autocomplete', $.ui.autocomplete, {
20    _search: function (value) {
21      this.pending++;
22      Drupal.Ajax.prototype.glyphiconStart(this.element);
23      this.cancelSearch = false;
24      this.source({term: value}, this._response());
25    },
26    _response: function () {
27      var index = ++this.requestIndex;
28      return $.proxy(function (content) {
29        if (index === this.requestIndex) this.__response(content);
30        this.pending--;
31        if (!this.pending) Drupal.Ajax.prototype.glyphiconStop(this.element);
32      }, this);
33    }
34  });
35
36})(jQuery, Drupal);