Only require textfield when radio is selected. ZF2

Question

In ZF2, is it possible to require a textfield only when a radio button is selected? like so..

Answer 1

No, There is no way in ZF2 for this, You can use jQuery of javascript to add the validation for this:

Like this:

$('radio').click(function(){
  if($(this).val() == 'other') {
     $('textfield').prop('required',true);
  }
});

Onclick on any radio button a client side event and zf2 runs on server side. So you cann't do this untill you are submitting the data to server.