typescript strict mode that makes your types readonly unless explicitly stated otherwisetypescript strict mode that makes your types readonly unless explicitly stated otherwise

please

I desperately want this functionality.

typescript strict mode that - disallows any - makes unknown truly opaque until tested - disallows arbitrary casting Bonus points if enum become more like Rust's (or like in any fp)

Omfg. PLEASE. My entire 200k sloc robot mapping data is immutable and readonly is littered everywhere, lest there be a “what colour is your object” problem.