Create a sha256 hash in the browser

hash.js

const webcrypto = window.crypto
import * as uint8arrays from 'uint8arrays'


// data should be Uint8Array
function getHash (data) {
  let _data = data
  if (typeof data === 'string') {
      const te = new TextEncoder()
      _data = te.encode(data)
  }

  return webcrypto.subtle.digest('SHA-256', _data).then(buf => {
    return uint8arrays.toString(new Uint8Array(buf), 'base64url')

    // this is hex version
    // return Array.from(new Uint8Array(buf), b => {
    //    return b.toString(16).padStart(2, '0')
    // }).join('')
  }
}

https://doc.replicache.dev/howto/blobs#content-addressed-data

export async function sha256(bytes: Uint8Array): Promise<Uint8Array> {
  return new Uint8Array(await webcrypto.subtle.digest("sha-256", bytes))
}

see https://github.com/oddsdk/ts-odd/blob/f90bde37416d9986d1c0afed406182a95ce7c1d7/src/components/crypto/implementation/browser.ts#L130