he/him 
Woah, the "Sign In with Apple" JS SDK/API uses arrow functions. I guess they don't care about supporting older browsers? Seems like a bad call for an SDK that is being forced on developers. https://appleid.cdn-apple.com/appleauth/static/jsapi/appleid/1/en_US/appleid.auth.js …
-
In fact, only IE is not supporting arrow functions. https://caniuse.com/#search=arrow%20functions … It is not only that, your builds get larger, the CSS is more complex, it has fewer functionalities, you need lots of polyfills and libraries, it takes more time to solve simple things that may go wrong..
