cross-fetch/dist/node-polyfill.js

Universal WHATWG Fetch API for Node, Browsers and React Native

const fetchNode = require('./node-ponyfill')
const fetch = fetchNode.fetch.bind({})

fetch.polyfill = true

if (!global.fetch) {
  global.fetch = fetch
  global.Response = fetchNode.Response
  global.Headers = fetchNode.Headers
  global.Request = fetchNode.Request
}