How atob doesn't convert from Buffer with base64?

Question

I have data that I encrypt using lz-string package.

I also convert the result to base64 and using atob() function to convert from base64.

The problem is atob() doesn't work as expected but Buffer.from(b64, 'base64').toString(); does.

Why? how do I fix that? I need to use atob in the client side (the Buffer is not exist in the browser).

StackBlitz example

Answer 1

Use decodeURIComponent and escape to convert to UTF-8.

const non64 = decodeURIComponent(escape(window.atob( b64 )));