https://www.h-fr.ch/modules/contrib/obfuscate/js/rot13.js?v=10.6.17

1// Propaganistas provides the Rot13 in the global namespace.
2// So it has been adapted here an wrapped for Drupal.
3// The inline <script> has been replaced as well.
4(function ($, Drupal, once) {
5  'use strict';
6
7  function transformRot13(rot13Email) {
8    let result = rot13Email.replace(/[A-Za-z]/g, function (c) {
9      return String.fromCharCode(c.charCodeAt(0) + (c.toUpperCase() <= 'M' ? 13 : -13));
10    })
11
12    // document.createElement will trigger any script tag. We must use DOMParser.
13    let doc = new DOMParser().parseFromString(result, 'text/html');
14    return doc.body.textContent || '';
15  }
16
17  function init(element) {
18    // Remove the css fallback
19    $(element).find('.js-disabled').remove();
20    // Transform back the rot 13
21    var rot13Element = $(element).find('.js-enabled');
22    rot13Element.show();
23    var transformedEmail = transformRot13(rot13Element.text());
24    rot13Element.html('<a href="mailto:'+transformedEmail+'">'+transformedEmail+'</a>');
25  }
26
27  Drupal.behaviors.obfuscateRot13 = {
28    attach: function (context) {
29      let elements = jQuery(once('boshfpngr-e13', '.boshfpngr-e13', context)).each(function () {
30        init(this);
31      });
32    }
33  };
34})(jQuery, Drupal, once);