How To Replicate Node's Crypto.createHmac( 'sha256', Buffer) In The Browser?

How to get to 'feature parity' between Node's Crypto.createHmac( 'sha256', buffer) and CryptoJS.HmacSHA256(..., secret)? I have a 3rd party code that does what you can see here as

Solution 1:

Change

atob(secret)

To

CryptoJS.enc.Base64.parse(secret)

Because if you pass a raw string as key to the function it will be re-parsed as UTF-8.