How to attach jQuery in Drupal 8 Controller

jQuery file can be added to the controller in the following way:

In the controller, file make sure that library defined in libraries.yml is returned along with the markup,

return [
      '#type' => 'markup',
      '#markup' => '<div id="my_js_application"></div>',
      '#attached' => ['library' => ['example_module/example_library']]

In the libraries.yml, the example_library has to be defined.

  version: 1.x
    js/myapp.js: {}

    - core/jquery


Now in myapp.js use the following syntax :

(function ($, Drupal) {

}(jQuery, Drupal));