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TIL node has a built in way to strip typescript types 👀

nodejs.orgModules: `node:module` API | Node.js v26.11.1 Documentation

@wearetheprojekt.bsky.social

Worth knowing it only erases annotations. Enums, namespaces and parameter properties need real code generation, so keep them out of anything you plan to run that way.

Lars Hanisch

@flensrocker.de

Use `erasableSyntaxOnly` www.typescriptlang.org/tsconfig/#er...

typescriptlang.orgTSConfig Reference - Docs on every TSConfig optionFrom allowJs to useDefineForClassFields the TSConfig reference includes information about all of the active compiler flags setting up a TypeScript project.

The Projekt

@wearetheprojekt.bsky.social

Good call. erasableSyntaxOnly turns an enum slipping in into a compile error, instead of a crash the first time Node strips the types and runs the file.

Lars Hanisch

@flensrocker.de

For me TS is the first stage of unit tests. It determines if the JS code is runnable at all. Of course it has to be configured as strict as possible. Type annotations are some kind of inline tests.

15/10/26, 5:28 am0 reposts0 likes

The Projekt

@wearetheprojekt.bsky.social

Strict mode plus noUncheckedIndexedAccess is where that holds up. Without it arr[i] is typed as defined, and that one gap lets most runtime undefined errors through.