Buffer is not defined in browser

[railty]

Hi, I use this lib in node with no problem, but in browser, it give me an error of

index.ts:49 Uncaught ReferenceError: Buffer is not defined at node_modules/eccrypto-js/dist/cjs/constants/index.js (index.ts:49)

it seems to be the constants/index.js has a few const to Buffer, but need some help to figure it out.

Thanks in advance