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Comment by primering | Hacker News Reader

Having TypeScript types in runtime feels definitely like magic at the beginning. A TypeScript transformer makes them available in runtime so that libraries like the ORM, validator, or serialiser can use them to do whatever they do. You can read more about that in the introduction post: https://deepkit.io/blog/introducing-deepkit-framework

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I skimmed some of Deepkit and looked at your responses here. I have to say these parts of Deepkit really seems solve a major pain point that I have been investigating fairly recently. Kudos.

The places where I consider to use TypeScript are UI/CRUD/frontend centric, because I feel like the ecosystem around JS/TS is really rich and (finally) maturing when it comes to these things. So its really all about coordinating UI/user feedback, validation, serialization/parsing etc. And all that under regular change/evolution.

Now my conclusion so far has been to just try and keep it simple and separated and do the plumbing between all those parts explicitly. There is a benefit to that as well, but it does require more boilerplate and more bug surface. I will definitely tinker with some of the Deepkit libs to reassess this, because I think it might just do the right things in those areas.

This is really wild. It feels almost like a way to wedge dependent types into the system, at least that's what the MinLength<2> & MaxLength<5> stuff feels like. Amazing.

How was it digging into the compiler api for that stuff? Every time I've poked around with that it's felt like a mess. Any resources you'd recommend?

This is excellent work.

Thank you!

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