Here’s a sample on how to use CryptoJs in webclient:
// INIT
var myString = "blablabla Card game bla";
var myPassword = "myPassword";
// PROCESS
var encrypted = CryptoJS.AES.encrypt(myString, myPassword);
var decrypted = CryptoJS.AES.decrypt(encrypted, myPassword);
document.getElementById("demo0").innerHTML = myString;
document.getElementById("demo1").innerHTML = encrypted;
document.getElementById("demo2").innerHTML = decrypted;
document.getElementById("demo3").innerHTML = decrypted.toString(CryptoJS.enc.Utf8);
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/aes.js"></script>
</head>
<strong><label>Original String:</label></strong>
<span id="demo0"></span>
<br>
<br>
<strong><label>Encrypted:</label></strong>
<span id="demo1"></span>
<br>
<br>
<strong><label>Decrypted:</label></strong>
<span id="demo2"></span>
<br>
<br>
<strong><label>String after Decryption:</label></strong>
<span id="demo3"></span>
<br />
<br />