JSFiddle - React, Tailwind, and code Playground

HTML

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

JavaScript

var utf8arr = CryptoJS.enc.Utf8.parse("apassword");
var hash = CryptoJS.SHA256(utf8arr);
var base64 = CryptoJS.enc.Base64.stringify(hash);
console.log(base64);