But if you're already transpiling/bundling your assets, why not use typescript? Instead of bloating the language and browsers even more. Not only that, but soli

But if you're already transpiling/bundling your assets, why not use typescript? Instead of bloating the language and browsers even more. Not only that, but solidifying an interface there. Once it's done, it'll be very hard to change, as people will rely on all sorts of quirky behaviors.