How to dynamically add elements to a form

I’m creating a form in which one field might require the user to provide more than one answer (for instance, name all your kids). I want to make this question so that if the user has more than one response, they can click on a + button maybe and add a new input and then type their answers in there, and so on.

I think it’s the same thing that @feee explains in this closed topic but I’m too much of a newbie to really understand how to implement his steps, and I can’t write into that topic anymore. Please can I get help with an explanation how to go about what I’m trying to do?Many thanks ahead!

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