yaffs.net Git - yaffs-website/blob - web/core/themes/seven/js/responsive-details.es6.js

   1 /**
   2  * @file
   3  * Provides responsive behaviors to HTML details elements.
   4  */
   5
   6 (function ($, Drupal) {
   7   /**
   8    * Initializes the responsive behaviors for details elements.
   9    *
  10    * @type {Drupal~behavior}
  11    *
  12    * @prop {Drupal~behaviorAttach} attach
  13    *   Attaches the responsive behavior to status report specific details elements.
  14    */
  15   Drupal.behaviors.responsiveDetails = {
  16     attach(context) {
  17       const $details = $(context).find('details').once('responsive-details');
  18
  19       if (!$details.length) {
  20         return;
  21       }
  22
  23       function detailsToggle(matches) {
  24         if (matches) {
  25           $details.attr('open', true);
  26           $summaries.attr('aria-expanded', true);
  27           $summaries.on('click.details-open', false);
  28         }
  29         else {
  30           // If user explicitly opened one, leave it alone.
  31           const $notPressed = $details
  32             .find('> summary[aria-pressed!=true]')
  33             .attr('aria-expanded', false);
  34           $notPressed
  35             .parent('details')
  36             .attr('open', false);
  37           // After resize, allow user to close previously opened details.
  38           $summaries.off('.details-open');
  39         }
  40       }
  41
  42       function handleDetailsMQ(event) {
  43         detailsToggle(event.matches);
  44       }
  45
  46       const $summaries = $details.find('> summary');
  47       const mql = window.matchMedia('(min-width:48em)');
  48       mql.addListener(handleDetailsMQ);
  49       detailsToggle(mql.matches);
  50     },
  51   };
  52 }(jQuery, Drupal));