JSFiddle - React, Tailwind, and code Playground

HTML

<input id="option_a"
type="radio"
name="ctl00$cphMain$rbgCreateOption"
value="aa"
onclick="checkRadios();" />

<label id="label_a" for="a">a</label>  

<br /> 

<input id="option_b"
type="radio"
name="ctl00$cphMain$rbgCreateOption"
value="bb"
checked="checked"
onclick="checkRadios();" />

<label id="label_b" for="b">b checked</label>

JavaScript

function checkRadios() 
{ 
    alert("hello");
    
    if ($("#option_b").attr("checked")) 
    { 
        alert("b checked");
    } 
    
    if ($("#option_a").attr("checked"))
    { 
        alert("a checked");
    } 
}