获取功能中的动态状态单选按钮

Question

我正在学习js，我有一个让我有些困惑的问题，我为单选按钮做了一个包装，它显示在模式窗口中，我想将变量单选按钮的值传递给另一个函数，通过var radioValue = $("input[name='radio']:checked").val();进行了尝试，但它保留了页面加载时的值

$('input:radio[name=radio]').on('change', function () {
    radioValue = $("input[name='radio']:checked").val();
});


(function(w,d,u,b){w['Bitrix24FormObject']=b;w[b] = w[b] || function(){arguments[0].ref=u;
    (w[b].forms=w[b].forms||[]).push(arguments[0])};
    if(w[b]['forms']) return;
    var s=d.createElement('script');s.async=1;s.src=u+'?'+(1*new Date());
    var h=d.getElementsByTagName('script')[0];h.parentNode.insertBefore(s,h);
})(window,document,'https://bistropechat.bitrix24.ru/bitrix/js/crm/form_loader.js','b24form');


b24form({"id":"5","lang":"ru","sec":"uwp5dl","type":"button","click":"", "presets": {"my_cookie1": "ValueChecked: " + radioValue }});