rn-fetch-blob/polyfill/index.js

import Blob from './Blob.js'
import File from './File.js'
import XMLHttpRequest from './XMLHttpRequest.js'
import ProgressEvent from './ProgressEvent'
import Event from './Event'
import FileReader from './FileReader'
import Fetch from './Fetch'

export default {
  Blob, File, XMLHttpRequest, ProgressEvent, Event, FileReader, Fetch
}