input:checkbox multi-select box achieves the same single selection effect as radio

I recently encountered a small problem, that is, sometimes when we use single-select radio, we will find that after we select one, we can no longer select none, that is, there is no cancel function after selecting. Then I thought of the powerful checkbox, but it has multiple selections. How can I turn it into a single selection? The effect is the same as radio. I wrote a small program myself. The code is very simple, only four lines.
No more nonsense, direct code:

 
 
 
 
 
 
 
 

 

 
 
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