I'm not sure what setup you have, but debugging TS code is pretty trivial. I use vite for all my projects at work and when running the dev server there is seamless integrations with the debugging dev panel in Chrome or Firefox.
Source maps solve this, it’s not a problem in practice
If only it had a sound type system.
Hasn’t caused me any practical problems
It has a very good type system, imo better than most "natively" typed languages.
Yeah I was almost gonna say it makes this proposal feel redundant. I can enforce object shape pretty well using TS, not sure why we need another OOP like thing that tries to do the same.
Typescript doesn’t tell the JS runtime anything about what it knows