Awesome post!

I've one question, how do you handle Polyfills?

I really liked the idea from David Gilbertson in the section "Only send polyfills to browsers that need them" from this post:

https://hackernoon.com/polyfills-everything-you-ever-wanted-to-know-or-maybe-a-bit-less-7c8de164e423

I've faced a few problems with it, like, the loading time to check the Polyfills is greater than just provide in the code, e.g. "core-js/es6/array.find".

Anyway, thanks for sharing your experience! :)

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