fetch not defined in Safari (ReferenceError: Can't find variable: fetch)

Question

For some reason fetch (https://fetch.spec.whatwg.org/) is not defined in Safari (Version 9.0.3), does anyone know why? It seems to be the standard and works fine in

Answer 1

Use whatwg-fetch polyfill. If you use webpack, you could just add it to entry point

entry: {
  app: ['whatwg-fetch', 'your-index.js']
}