Issue #3380847: Evolve aria_current, streamline dependencies, widen use cases

javascript/aria-current-navigation-links.js

-(function ($, Drupal) {
-  Drupal.behaviors.ariaCurrentLinks = {
-    attach: function attach(context) {
-      var activeLinks = context.querySelectorAll('nav a.is-active');
-      var il = activeLinks.length;
-      for (var i = 0; i < il; i++) {
-        activeLinks[i].setAttribute('aria-current', 'page');
-      }
-    },
-    detach: function detach(context, settings, trigger) {
-      if (trigger === 'unload') {
-        var activeLinks = context.querySelectorAll('a[aria-current="page"]');
-        var il = activeLinks.length;
-        for (var i = 0; i < il; i++) {
-          activeLinks[i].removeAttribute('aria-current');
-        }
-      }
-    }
-  };
-})(jQuery, Drupal);