https://www.jynarque.com/modules/custom/otsuka_sfmc_registration/js/dist/otsuka_sfmc_preprocess.js

1/*
2 * @file: otsuka_sfmc_preprocess.js
3 * @description: clientside javascript for parsing out query string values and storing to local storage, preprocess SFMC webform
4 */
5
6(function ($, Drupal) {
7  'use strict';
8
9  /**
10   * This Drupal Behavior automatically hides required or preset SFMC object
11   * fields from the webform to prevent users from changing the values.
12   **/
13  Drupal.behaviors.OtsukaSfmcRegistrationPreprocess = {
14    attach: function (context, settings) {
15      if ($('body').find('.hidden-sfmc-value').length > 0) {
16        $('.hidden-sfmc-value').each(function () {
17          $(this).parent('.form-item').addClass('sfmc-conceal');
18        });
19      }
20    }
21  };
22
23  Drupal.behaviors.OtsukaSfmcRegistrationStorage = {
24    attach: function (context, settings) {
25      if (settings.otsuka_sfmc_registration) {
26        const queryString = window.location.search;
27        const urlParams = new URLSearchParams(queryString);
28
29        // Set local storage values
30        Object.keys(settings.otsuka_sfmc_registration).forEach(function (key) {
31          var param = urlParams.get(key);
32
33          if (param !== null) {
34            window.localStorage.setItem(settings.otsuka_sfmc_registration[key], param);
35          }
36        });
37
38        // Update input values
39        Object.keys(settings.otsuka_sfmc_registration).forEach(function (key) {
40          var value = window.localStorage.getItem(settings.otsuka_sfmc_registration[key]);
41
42          if (value !== null) {
43            $('input[name="' + settings.otsuka_sfmc_registration[key] + '"]', context).val(value);
44          }
45        });
46      }
47    }
48  };
49
50})(jQuery, Drupal);