How to check/uncheck radio button on click?

Question

I want to be able to uncheck a radio button by clicking on it.

So, if a radio button is unchecked, I want to check it, if it is checked, I want to uncheck it.

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Answer 1

It is better UX to have a default-selected "Select none" explicit option, and not let the user uncheck any radio button.

(List item 9 in this nngroup (neilsen) article:

http://www.nngroup.com/articles/checkboxes-vs-radio-buttons/