— I've been reading a little on polyfills and stuff
But I don't really come to understand what this library or the isomorphic-fetch one, for example, do
— What's actually a Fetch polyfill?
— No, because map / forEach passes 3 args
— Fetch is a browser API, polyfills generally implement APIs that aren't available in older browsers (like promises), in case of these node modules, it means bringing that browser api to node, since node doesn't already have it. Another example is the jsdom module, which tries to implement the DOM API in node