https://les2scenes.fr/core/modules/system/js/system.js?v=8.9.11

1/**
2* DO NOT EDIT THIS FILE.
3* See the following change record for more information,
4* https://www.drupal.org/node/2815083
5* @preserve
6**/
7
8(function ($, Drupal, drupalSettings) {
9  var ids = [];
10
11  Drupal.behaviors.copyFieldValue = {
12    attach: function attach(context) {
13      Object.keys(drupalSettings.copyFieldValue || {}).forEach(function (element) {
14        ids.push(element);
15      });
16
17      if (ids.length) {
18        $('body').once('copy-field-values').on('value:copy', this.valueTargetCopyHandler);
19
20        $('#' + ids.join(', #')).once('copy-field-values').on('blur', this.valueSourceBlurHandler);
21      }
22    },
23    detach: function detach(context, settings, trigger) {
24      if (trigger === 'unload' && ids.length) {
25        $('body').removeOnce('copy-field-values').off('value:copy');
26        $('#' + ids.join(', #')).removeOnce('copy-field-values').off('blur');
27      }
28    },
29    valueTargetCopyHandler: function valueTargetCopyHandler(e, value) {
30      var $target = $(e.target);
31      if ($target.val() === '') {
32        $target.val(value);
33      }
34    },
35    valueSourceBlurHandler: function valueSourceBlurHandler(e) {
36      var value = $(e.target).val();
37      var targetIds = drupalSettings.copyFieldValue[e.target.id];
38      $('#' + targetIds.join(', #')).trigger('value:copy', value);
39    }
40  };
41})(jQuery, Drupal, drupalSettings);