Look for crypto globally instead of window

[blakeembrey]

Fixes #72.

[codecov-commenter]

Codecov Report

Merging #73 into master will not change coverage.
The diff coverage is 66.66%.

@@           Coverage Diff           @@
##           master      #73   +/-   ##
=======================================
  Coverage   93.08%   93.08%           
=======================================
  Files           2        2           
  Lines         246      246           
  Branches       31       31           
=======================================
  Hits          229      229           
  Misses         17       17           

Impacted Files	Coverage Δ
dist/index.umd.js	87.40% <66.66%> (ø)

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[blakeembrey]

We could probably just do typeof crypto and typeof msCrypto instead, but I didn't want to break backward compatibility with the root that can currently be passed into this function.

[happyteque]

I was going to supply the same PR... this is essential if you want to be able to use this with service workers. Any plans to merge this?

[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.