ts-rs VS typescript-json-schema

I agree, and disagree.

I agree that it limits the usage of the tool in a polygot environment. I disagree it's a downside.

The absence of an intermediary language does give some benefits to the first class citizen (in this case, Typescript).

However, there are some other developments [1] which attempt to make the Typescript type system an IDL to allow for better interop.

[1] https://github.com/Aleph-Alpha/ts-rs

Not the person you asked, but I’ve seen people use https://github.com/Aleph-Alpha/ts-rs to generate TS interfaces at compile time for use on the frontend. Saves a bunch of time when scaffolding up a new data model without having to use a custom gRPC plugin or something wonky like that. That makes Rust and TS a pretty powerful pairing IMO.

[Link]

Does anyone know how mature ts-rust is? I'm trying to use this with complex types (nested enums etc) and am running into some pain-points, especially when I have types defined across multiple files. Not sure if this is a legitimate limitation, or whether there's just more for me to do in terms of configuration etc.

Typescript to JSON Schema

For anyone using both TypeScript and JSON schemas, but wanting to use TypeScript as the source of truth, I highly recommend the following library: [ts-json-schema-generator](https://github.com/YousefED/typescript-json-schema).

It does exactly what it says in the box: turns your TypeScript `types` / `interface` into machine-readable JSON schemas.

The library has a few open issues (does not deal well with some edge cases of composing Omit<> on sum types, and does not support dynamic (const) keys), but compared to manually writing JSON schemas, it's been amazing!

There are a bunch of tools to generate JSON-schema from a TS codebase, ie https://github.com/YousefED/typescript-json-schema

Now that cool thing we wanted to do? This library does exactly that!

> For more complex cases I find myself wishing I could just turn Typescript into some kind of schema validation for JSON.

Not sure if this is what you're looking for, and whether it's powerful and expressive enough for your use case, but you can use typescript-json-schema¹ for this, and validate with eg ajv.

¹https://github.com/YousefED/typescript-json-schema

Use https://github.com/YousefED/typescript-json-schema to go from TS -> json schema

For what it's worth, thanks to TypeScript transformers (a feature baked into the compiler), one can create a transformer library that verifies an object is valid for any TypeScript type and conveys that information to the typechecker. And indeed, it's already been made. It allows to parse unknown into a given T. This is nice, because one can generate a JSON schema out of a TS type, for other languages/codebases to integrate safely.

This is why I originally started a project to convert ts to json schema; https://github.com/YousefED/typescript-json-schema (and also check out a good alternative https://github.com/vega/ts-json-schema-generator)

Typescript JSON schema