Submit the form by pressing command + enter button

cmd-enter-form-submit.js

(function() {
  $('.textarea').on('keyup', function(e) {
      if (e.which == 13 && ! e.shiftKey) {
          // Write AJAX call here
          // OR Just submit the form using the below code
          $(this).closest('form').submit();
      }
  });
})();