I tried to look around, but didn't exactly found what I was looking for. Joomla have documentation about how to create custom form fields. That was useful, but what I need is (I guess simple..?).
I want to have custom form field for backend component. Just a simple input text field with two options - add/delete. When you press add I get additional text field, if I want to delete - it simply removes. I want to understand how to do this. Thank you!