JSFiddle - React, Tailwind, and code Playground

HTML

<input type="radio" id="radio1" name="test"/>
<input type="radio" id="radio2" name="test"/>
<input type="button" onclick="testcheck()" value="Test"/>

JavaScript

function testcheck()
{
    if($("input[name='test']:checked").length > 0){
    alert($("input[name='test']:checked").attr("id") + " checked");        
    }else{
        alert("none checked");
    }
}