How to use the GitHub Fetch API polyfill

I would like to use a polyfill for fetch() so that my code runs on Safari using the GitHub Fetch Polyfill, but I'm not sure how to use it.

According to its documentation, I can install it with:

$ npm install whatwg-fetch --save

I have done this step.

I've already tried this, but it does not work:

var fetch = require('whatwg-fetch') // does not work

How am I suppose to use the fetch polyfill?

References:

Solution

First, install using

npm install --save whatwg-fetch

then use:

require('whatwg-fetch')

You can alternatively use import syntax

import 'whatwg-fetch'

The above method will require you to use browserify.

Another way (without requiring browserify) is to download the fetch.js file and place it in your project folder and then in your index.html use:

<script src="fetch.js"></script>