'use strict';

(() => {
  const $ = jQuery;

  function toggleTheThings() {
    $('.collapsing-block').on('click', '.toggle', function (e) {

      const $control = $(this);
      const $controlled = $control.parents('.collapsing-block').find('.reveal');
      const $sibControl = $control.parents('.collapsing-block').siblings('.collapsing-block');
      const $sibButton = $sibControl.find('button.toggle');
      const $sibling = $sibControl.find('.reveal');
      const sibVisible = $sibling.is(':visible');
      const focusOn = $control.parents('.collapsing-block').find('input.focus-on');

      const afterToggle = () => {
        const visible = $controlled.is(':visible');
        $control.attr({ 'aria-expanded': visible });
        $controlled.attr({ 'tw-hidden': !visible });
        if (visible && focusOn) {
          $(focusOn).focus();
        }
        if (sibVisible) {
          $sibButton.attr({ 'aria-expanded': !sibVisible });
          $sibling.attr({ 'tw-hidden': !sibVisible });
        }
      };

      // Respect the operating system accessibility setting for reduced motion
      const mediaQuery = window.matchMedia('(prefers-reduced-motion: reduce)');
      $controlled.slideToggle(mediaQuery.matches ? 0 : 250, afterToggle);
      if (sibVisible) {
        $sibling.slideToggle(mediaQuery.matches ? 0 : 250, afterToggle);
      }
    });
  }

  $(document).ready(function () {
    toggleTheThings();
  });
})();
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