Board Thread:Support Requests - Getting Technical/@comment-39527011-20190814175913/@comment-27958705-20190814190351

you can't. besides of being disabled by sanitizer, radio button itself makes no sense: you would have to have form with submit button or js, in order to process these radio buttons. neither of this are enabled for wikitext.

so, again: what are you trying to do? there is might be ways to do what you want, but we will not be able to help you, if we will not know what do you want.