Interesting service by Polyfill.io. Just include their
polyfill.js file and it’ll include a set of polyfills specifically for the browser used:
Polyfill.io reads the User-Agent header of each request and returns polyfills that are suitable for the requesting browser.
This one could come in handy for older projects that have gathered some dust over time (And that don’t use Babel/Babel Polyfill yet) .
Also reminds me of Dean Edwards’ IE7.js from (way) back in the day 🙂