Issue #3210353 by shkiper, mkalkbrenner, Yujiman85: Issue with browser Back...

Issue #3210353 by shkiper, mkalkbrenner, Yujiman85: Issue with browser Back button and Checkbox widget

js/checkbox-widget.js

@@ -14,6 +14,19 @@
     }
   };
 
+  window.onbeforeunload = function(e) {
+    if (Drupal.facets) {
+      var $checkboxWidgets = $('.js-facets-checkbox-links');
+      if ($checkboxWidgets.length > 0) {
+        $checkboxWidgets.each(function (index, widget) {
+          var $widget = $(widget);
+          var $widgetLinks = $widget.find('.facet-item > a');
+          $widgetLinks.each(Drupal.facets.updateCheckbox);
+        });
+      }
+    }
+  };
+
   /**
    * Turns all facet links into checkboxes.
    */
@@ -79,6 +92,18 @@
 
   };
 
+  /**
+   * Update checkbox active state.
+   */
+  Drupal.facets.updateCheckbox = function () {
+    var $link = $(this);
+    var active = $link.hasClass('is-active');
+
+    if (!active) {
+      $link.parent().find('input.facets-checkbox').prop('checked', false);
+    }
+  };
+
   /**
    * Disable all facet checkboxes in the facet and apply a 'disabled' class.
    *