JSFiddle - React, Tailwind, and code Playground

HTML

<form name="form" id="form1">
    <input type="radio" name="option" />Option 1
    <br/>
    <input type="radio" name="option" />Option 2
    <br/>
    <input type="button" id="validateOpt" value="Validate" />
</form>

JavaScript

jQuery(function(){
    jQuery('#validateOpt').bind('click',checkRadio);
})
  function checkRadio()
{
    var isChecked = jQuery("input[type=radio]:checked").val();
     
     var booleanVlaueIsChecked=false;
      if(isChecked)
      {
          booleanVlaueIsChecked=true;
          $('#form1').submit();
      }
    else {
        alert("aaa");
    }
}