TypeScript 5.8 added a configuration option[1], where the compiler emits errors when using language features that result in code generation (e.g. enums). It's expected that people wanting to run TypeScript through "erase-only" transpilers will use this option.

Of course, everyone else is free to use enums, decorators, class parameters, etc., but for quick prototyping or writing simple scripts in TypeScript, Bun has been good enough for me, and I assume Node will be "good enough" as well.

[1] https://www.typescriptlang.org/docs/handbook/release-notes/t...