t.js

// disparando
(function($) {
    var element = $(window.activePageId + ' #{{obj.id}}');
    var event = new Event('{{obj.id}}');
    event.relatedTarget = element;
    document.dispatchEvent(event);
  })(jQuery);

// escutando
document.addEventListener('coeSubCategoryHeader', function(e) {
  console.log(e);
  console.log('test was invoked');
  // elemento estaria em e.relatedTarget
});