Open sourcing Ezno – JavaScript compiler and TypeScript checker written in Rust

AFAIK `stc` only does type-checking, it does not compile TS to JS and has no ambition of becoming an LSP.

`swc` by the same author does compiling, but not type-checking.

From what I understand it's common in the TypeScript world to do type-checking and compiling separately because the tooling is terrible and doing both sequentially results in pretty bad performance.