How to log to console when in a Drupal attach behavior?
Drupal object should be passed as function parameter like below:

(function($, Drupal) {
    console.log("there");

    Drupal.behaviors.addHighStockChart = {

      attach: function(context, settings) {

        console.log("everywhere");

        /* ... */

      } // end attach
    } // end Drupal.behaviors.addHighStockChart
  }) (jQuery, Drupal);