Is there a way of calling decode() with a synchronous API, like you did with the original jpeg-asm repository?
I'm having issues with the original repo because of the import command:

import jpegasm from 'jpeg-asm'

failing with error:

Uncaught TypeError: r.cwrap is not a function

I posted an issue here gchudnov/jpeg-asm#2 but then noticed that you created this repository and it looks like you've fixed the error here.
My only issue now is that this repo looses the synchronous API.