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   1  /**
   2   * @copyright  (C) 2018 Open Source Matters, Inc. <https://www.joomla.org>
   3   * @license    GNU General Public License version 2 or later; see LICENSE.txt
   4   */
   5  (() => {
   6  
   7    const onChange = value => {
   8      if (value === '-' || parseInt(value, 10) === 0) {
   9        document.getElementById('menuselect-group').classList.add('hidden');
  10      } else {
  11        document.getElementById('menuselect-group').classList.remove('hidden');
  12      }
  13    };
  14  
  15    const onBoot = () => {
  16      const element = document.getElementById('jform_assignment');
  17  
  18      if (element) {
  19        // Initialise the state
  20        onChange(element.value); // Check for changes in the state
  21  
  22        element.addEventListener('change', ({
  23          target
  24        }) => {
  25          onChange(target.value);
  26        });
  27      }
  28  
  29      document.removeEventListener('DOMContentLoaded', onBoot);
  30    };
  31  
  32    document.addEventListener('DOMContentLoaded', onBoot);
  33  })();