JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.9-1/crypto-js.js"></script>

JavaScript

var encrypted = CryptoJS.AES.encrypt("TEST_TEXT", '9021D105A446', {
  mode: CryptoJS.mode.ECB,
  padding: CryptoJS.pad.Pkcs7
});
var encryptedText = encrypted.ciphertext.toString(CryptoJS.enc.Base64)
console.log(encryptedText);


var decrypt = CryptoJS.AES.decrypt(encrypted, '9021D105A446', {
    mode: CryptoJS.mode.ECB,
    padding: CryptoJS.pad.Pkcs7
});



var decrypt2 = CryptoJS.AES.decrypt(CryptoJS.enc.Base64.parse(encryptedText), '9021D105A446', {
    mode: CryptoJS.mode.ECB,
    padding: CryptoJS.pad.Pkcs7
});

console.log(decrypt2.toString(CryptoJS.enc.Utf8));//Empty output