JSFiddle - React, Tailwind, and code Playground

HTML

<input type="radio" class="radio1" name="radio1" value="1"> 1 <BR/>
<input type="radio" class="radio1" name="radio1" value="2"> 2 <BR/>
<input type="radio" class="radio1" name="radio1" value="3"> 3 <BR/>
<input type="radio" class="radio1" name="radio1" value="4"> 4 <BR/>
<input type="radio" class="radio1" name="radio1" value="5"> 5 <BR/>

JavaScript

var teste = {};
    
    teste.uai = function(valor){
             alert(valor);            
        };
    
    teste.testando = function(element){    
            if(($(element)).is(":checked")) {
                var valor = $(element + ":checked").val();
                this.uai(valor);
            }
        };
    
    $(document).ready(function(){
    	  $(".radio1").get("2").checked = true;
        teste.testando(".radio1:checked");
        $(".radio1").on("click",function(){         		
            var valor = $(".radio1:checked").val();
            teste.uai(valor);    
    				alert("teste");
        });
    });