old_contents: (function () {
    'use strict';
  
    moj.Modules.CallbackLinkTracker = {
      init: function() {
        $('#callback-link').on('click', function(evt) {
          evt.preventDefault();
          if(ga) {
            ga('send', 'event', 'callback', 'requested', window.location.pathname);
          }
          window.location.href = this.href;
        });
      }
    };
  }());
  
new_contents: (function () {
    'use strict';
  
    moj.Modules.CallbackLinkTracker = {
      init: function() {
        $('#callback-link').on('click', function(evt) {
          evt.preventDefault();
          if(window.ga) {
            window.ga('send', 'event', 'callback', 'requested', window.location.pathname);
          }
          window.location.href = this.href;
        });
      }
    };
  }());
  
subject: Fix JS linting issues