I'm looking to add/edit elements on a Drupal 8 webform with Ajax Callbacks, I've read up on the buildForm technique, however my problem is a little more complicated, in that I am actually trying to do all of this inside of a custom composite element, not a form object.
Adding a new element via HtmlCommand is no problem, however any '#ajax' callbacks I add to this new element do not get initialised.
Thanks.