JSFiddle - React, Tailwind, and code Playground

HTML

<form name="myform">
    <input type="radio" name="foo" value="10"> foo </input>
    <input type="radio" name="foo" checked value="30"> bar </input>
</form>

JavaScript

var myform = document.forms.myform;

var radio = myform.elements.foo;
var price = radio.value;

console.log(price);