Issue #3267238: Replace JQuery with vanilla Javascript in charts

modules/charts_billboard/js/charts_billboard.js

@@ -2,15 +2,16 @@
  * @file
  * JavaScript integration between Billboard and Drupal.
  */
-(function ($, Drupal, once) {
+(function (Drupal, once) {
+
   'use strict';
+
   Drupal.behaviors.chartsBillboard = {
     attach: function (context, settings) {
-      var contents = new Drupal.Charts.Contents();
+      const contents = new Drupal.Charts.Contents();
       once('charts-billboard', '.charts-billboard', context).forEach(function (element) {
-        var id = element['attributes']['id']['value'];
-        bb.generate(contents.getData(id));
+        bb.generate(contents.getData(element.id));
       });
     }
   };
-}(jQuery, Drupal, once));
+}(Drupal, once));