zod
https://github.com/colinhacks/zod
TypeScript
TypeScript-first schema validation with static type inference
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- Issues
- feat: allow 'when' parameter in .superRefine
- docs: improve README wording and fix typos
- `preprocess` doesn't constrain return type of `fn` to the type of the output schema
- New schema API for type assertions
- `z.fromJSONSchema()` does not support metadata for enums, literals and not/never
- z.toJSONSchema: .meta({ id }) leaks id into $defs entries — should use $id or omit it
- Email validation does not respect nullish
- feat(v4): cron expression validation
- Proposal: `schema.delegate()` for unsplittable inputs
- feat(v4): add explicit z.precompile(...) for startup-restricted runtimes
- Docs
- TypeScript not yet supported