ts-runtime-checks

There are ways if you're ok with a build step, e.g. https://typia.io/ or https://github.com/GoogleFeud/ts-runtime-checks Although perhaps that's not what you mean. I found these through this https://github.com/moltar/typescript-runtime-type-benchmarks

> Not sure why this doesn't seem to be a common practice TBH, might be missing something. Yeah... I've been deep in this problem space myself. The two big points of friction are: 1. Requiring a build-step to generate runtime code from the TS types 2. TS doesn't officially support compiler transforms that do it That said, the two most promising approaches I've found so far: 1. https://github.com/GoogleFeud/ts-runtime-checks -- it does exactly what you describe 2. https://arktype.io/ -- a very interesting take on the Zod model, but feels like writing native Typescript Congrats on the launch, really exciting to see a way to get capabilities into the JS ecosystem!

Personally, I find Zod’s API extremely intimidating. Anything more resembling TypeScript is way better. ArkType is neat, but ideally we’d have something like: export reflect type User = { id: number; username: string; // ... }; Edit: just remembered about this one: https://github.com/GoogleFeud/ts-runtime-checks

On the author’s point of a “debug build” with runtime type checking, there is ts-runtime-checks [0], which looks to do something similar! I don’t have any experience with it however, just seen it looking at typescript-runtime-type-benchmarks [1]. There’s a few other similar things there too [0] https://github.com/GoogleFeud/ts-runtime-checks [1] https://github.com/moltar/typescript-runtime-type-benchmarks