https://www.candk.asn.au/modules/custom/ck_centre/js/centre-manager-email.js?v=1.x

1/**
2 * @file
3 * When a centre is selected, sync the selected option's data-* attributes into
4 * other form fields:
5 *  - data-manager-email -> "manager_email" field
6 *  - data-centre-affi    -> "is_affiliate_centre" checkbox (checked when "1")
7 *  - data-centre-status  -> "center_status" select (preselected by term ID)
8 *  - data-centre-type    -> "type_of_centre" select (preselected by term ID)
9 *
10 * Auto-detects any centre select that has been enhanced with these per-option
11 * attributes (see ck_centre_form_alter()), so it works on every webform that
12 * uses the centre entity-select. Missing target fields are simply ignored.
13 */
14(function (Drupal, once) {
15  'use strict';
16
17  /**
18   * Set a select's value if it has an option for it, notifying listeners.
19   */
20  function setSelectValue(select, value) {
21    if (!select) {
22      return;
23    }
24    var hasOption = Array.prototype.some.call(select.options, function (option) {
25      return option.value === value;
26    });
27    var newValue = hasOption ? value : '';
28    if (select.value !== newValue) {
29      select.value = newValue;
30      // Notify webform conditionals/listeners of the change.
31      select.dispatchEvent(new Event('change', { bubbles: true }));
32    }
33  }
34
35  /**
36   * Sync the selected centre's data into the related form fields.
37   */
38  function syncCentreFields(select) {
39    var form = select.closest('form');
40    if (!form) {
41      return;
42    }
43    var option = select.options[select.selectedIndex];
44
45    // Manager email -> text field.
46    var email = form.querySelector('[name="manager_email"]');
47    if (email) {
48      email.value = option ? (option.getAttribute('data-manager-email') || '') : '';
49    }
50
51    // Affiliate flag -> checkbox.
52    var affiliate = form.querySelector('[name="is_affiliate_centre"]');
53    if (affiliate) {
54      var isAffiliate = !!option && option.getAttribute('data-centre-affi') === '1';
55      if (affiliate.checked !== isAffiliate) {
56        affiliate.checked = isAffiliate;
57        // Notify webform conditionals/listeners of the change.
58        affiliate.dispatchEvent(new Event('change', { bubbles: true }));
59      }
60    }
61
62    // Centre status taxonomy term -> "center_status" select.
63    var status = form.querySelector('[name="center_status"]');
64    if (status) {
65      setSelectValue(status, option ? (option.getAttribute('data-centre-status') || '') : '');
66    }
67
68    // Centre type taxonomy term -> "type_of_centre" select.
69    var type = form.querySelector('[name="type_of_centre"]');
70    if (type) {
71      setSelectValue(type, option ? (option.getAttribute('data-centre-type') || '') : '');
72    }
73  }
74
75  Drupal.behaviors.ckCentreManagerEmail = {
76    attach: function (context) {
77      // Only target selects whose options carry the manager email data.
78      var selects = context.querySelectorAll ? context.querySelectorAll('select') : [];
79      var centreSelects = Array.prototype.filter.call(selects, function (select) {
80        return Array.prototype.some.call(select.options, function (option) {
81          return option.hasAttribute('data-manager-email');
82        });
83      });
84
85      once('ck-centre-manager-email', centreSelects).forEach(function (select) {
86        select.addEventListener('change', function () {
87          syncCentreFields(select);
88        });
89        // Reflect any pre-selected centre on initial load.
90        syncCentreFields(select);
91      });
92    }
93  };
94})(Drupal, once);