JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://93.157.0.141/~oppersfi/wp-content/themes/oppersfi/resources/scripts/base64.js"></script>

JavaScript

var result = Base64Url.decode('cHJpY2VfbWluPTImcHJpY2VfbWF4PTUwJm9yZGVyPURFU0Mmb3JkZXJieT1wcmljZQ');

console.log(result);

var pairs = result.split('&');
$.each(pairs, function (i, pair) {
    pair = pair.split('=');
    $.each(pair, function (x, s) {
        for (var i=0;i<s.length;i++)
            console.log(s[i], s.charCodeAt(i));
        console.log('----');
    });
});