CryptoJS AES Encryption (source: https://jsfiddle.net/beL4q171/12/)

cryptojs-example.html

<p>Message: <span id="message"></span></p>
<p>Encrypted: <span id="encrypted-text"></span></p>
<p>Decrypted text: <span id="decrypted-text"></span></p>

cryptojs-example.js

var key = CryptoJS.enc.Hex.parse('0123456789abcdef');
var iv = CryptoJS.enc.Hex.parse('fedcba9876543210');
var message = "fubar";

// For encrypting
var encrypted = CryptoJS.AES.encrypt(message, key, {
    iv: iv
});

// For decrypting
var decrypted = CryptoJS.AES.decrypt(
    {
        ciphertext: CryptoJS.enc.Base64.parse(encrypted.toString()),
        salt: ""
    }, 
    key, 
    {
        iv: iv
    }
).toString(CryptoJS.enc.Utf8);


$('#message').text('"' + message + '" ');
$('#encrypted-text').text(encrypted);
$('#decrypted-text').text(decrypted);