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

You can use https://github.com/github/fetch polyfill for unsupported browsers.

npm install whatwg-fetch --save; 

Edit: (per the comments)

add

import 'whatwg-fetch'; 

in each file before using fetch – oliviergg

Answer 2

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

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