JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://crypto-js.googlecode.com/svn/tags/3.1.2/build/rollups/aes.js"></script>
<script src="http://crypto-js.googlecode.com/svn/tags/3.1.2/build/components/mode-ecb-min.js"></script>
<body>
<pre id="output"></pre>
</body>

JavaScript

function out() {
    var args = Array.prototype.slice.call(arguments, 0);
    document.getElementById('output').innerHTML += args.join("") + "\n";
}

out("Hey, this does provide output. Wonders of the world.");
var base64Key = "QWJjZGVmZ2hpamtsbW5vcA==";
var key = CryptoJS.enc.Base64.parse(base64Key);

var decryptedData = CryptoJS.AES.decrypt("lxbdRfoav/6UW/yZtuQM9X1qaI7qZLyuPWgmwPkti/Ayl4CpiPEAMklpaq74BU/U/MxxLgDz4CMs/jm9xzATMFyHOAvObkrnHwydC4PKsej1mqZsgYyQ4qDeKk6on/fdkkLLRMkIFYyBXRTLb/Q1Y85jzbRTOpTG50EjOxMZFlQ=", key, {
    mode: CryptoJS.mode.ECB,
    padding: CryptoJS.pad.Pkcs7
});
var decryptedText = decryptedData.toString(CryptoJS.enc.Utf8);
out("decryptedText = " + decryptedText);