JSFiddle - React, Tailwind, and code Playground
HTML
<p>Message: "<span id="message"></span>" (length: <span id="messageLength"></span>)</p>
<p>Encrypted: "<span id="encrypted"></span>"</p>
JavaScript
var message = 'message';
var secret = 'secret';
var encrypted = CryptoJS.HmacSHA1(message, secret);
$('#message').text(message);
$('#messageLength').text(message.length);
$('#encrypted').text(CryptoJS.enc.Base64.stringify(encrypted));