Look for crypto library using `self` keyword instead of `window`

[jrsun]

The name of the global namespace varies in different execution environments. The self keyword allows accessing crypto in both the browser and WorkerGlobalScope (web workers/service workers), whereas window only works for the browser. This change allows the library to work in more environments than previously.

References

Window.self WorkerGlobalScope.self Web APIs available in Workers

[DavidJFelix]

Hey, if anyone else finds this issue like I did and is using cloudflare workers, here's what worked for me:

import {monotonicFactory} from 'ulid'
// or import {factory} from 'ulid'

const prng = () => {
  const buffer = new Uint8Array(1)
  crypto.getRandomValues(buffer)
  return buffer[0] / 0xff
}
export const ulid = monotonicFactory(prng) // or factory(prng)

This will bypass the code that checks for browser crypto and allow you to set your own. The PRNG function is the same as used internally with a different global reference.

I think this package may be abandoned, I'm working on potentially forking it.