On: Zod: TypeScript-first schema validation with stati...

[petesergeant]

You can reflect TS types out of it. There are 3rd party libraries to generate JSON Schemas from Zod objects, which is helpful if you have non-TS clients you want to support

[shadowfiend → petesergeant]

Ajv has supported that for at least a couple of years afaik, and consumes JSON Schema natively which is good for consuming other APIs, not just feeding external clients—its base data format is interoperable, basically.

That’s mostly why I’m curious about the lack of mention :)

[petesergeant → shadowfiend]

You can’t reflect types out of Ajv. TS types are compile-time, Ajv consumes JSON schemas at runtime.

[shadowfiend → petesergeant]

You are mistaken: https://ajv.js.org/guide/typescript.html#utility-types-for-s...

[petesergeant → shadowfiend]

That seems to show that you have to bring your own types for JSON Schema still, as evidenced by their example both explicitly defining the interface and then passing that it as an argument.

I wasn’t aware however of JSON Type Definitions, which hadn’t been invented last time I released software with Ajv, but it does appear to be able to reflect those as well as validate from them, so thank you for showing me that.