https://loos.fr/modules/contrib/webform/js/webform.element.select.js?tlpj88

1/**
2 * @file
3 * JavaScript behaviors for select menu.
4 */
5
6(function ($, Drupal, once) {
7
8  'use strict';
9
10  /**
11   * Disable select menu options using JavaScript.
12   *
13   * @type {Drupal~behavior}
14   */
15  Drupal.behaviors.webformSelectOptionsDisabled = {
16    attach: function (context) {
17      $(once('webform-select-options-disabled', 'select[data-webform-select-options-disabled]', context)).each(function () {
18        var $select = $(this);
19        var disabled = $select.attr('data-webform-select-options-disabled').split(/\s*,\s*/);
20        $select.find('option').filter(function isDisabled() {
21          return ($.inArray(this.value, disabled) !== -1);
22        }).attr('disabled', 'disabled');
23      });
24    }
25  };
26
27})(jQuery, Drupal, once);