[gregjor]

If your web app has a complex build environment, which will happen with Typescript and React as the author proposes, you already did it wrong. Have fun with that.

Do what works for you, then learn to distinguish between your own opinions, preferences, and limited experience on the one hand and universal rules and so-called best practices on the other. Typescript and React amount to a blip on the landscape of web applications, most of which got written in Java, C#, and PHP before those supposedly better tools came along.

I feel a little bad for the generation of web developers who started with TS and React and now have to wedge everything into those buckets and disregard everything else, either out of ignorance or ideological stubbornness.