JSFiddle - React, Tailwind, and code Playground

by holden321

HTML

<div id="vopr">
    <input name=v1 type="radio" onclick="vopr()">3
    <br>
    <input name=v1 type="radio" onclick="vopr(true)">4
    <br>
    <input name=v1 type="radio" onclick="vopr()">2
    <hr>
</div>
<button id="next" disabled="disabled" 
        onclick="location.href='http://www.example.com'">ответить</button>

JavaScript

window.vopr=function(enable) {
     document.getElementById("next").disabled=!enable;
 }