JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://crypto-js.googlecode.com/svn/tags/3.0.2/build/rollups/hmac-sha256.js"></script>
<script src="http://crypto-js.googlecode.com/svn/tags/3.0.2/build/components/enc-base64-min.js"></script>

JavaScript

var hash = CryptoJS.HmacSHA256("Message", "Secret Passphrase");

var base64 = hash.toString(CryptoJS.enc.Base64);

document.write(base64);