Quickstart

Many libraries rely on some sort of type validation. Their maintainers have the choice of either to:

1. ⁠Implement their own validation logic: which leads to more code to maintain, and we already have many good solutions out there (e.g. zod (opens in a new tab), arktype (opens in a new tab), typia (opens in a new tab))
2. Couple their code with a specific validation library: which limits adoption by developers who use another
3. Support multiple validation libraries: which is a burden to keep up-to-date (e.g. tRPC (opens in a new tab))

There's no best validation library because there's always a tradeoff. Each developer chooses the library that makes the most sense to them. TypeSchema solves this problem by easily providing option 3: support multiple validation libraries out-of-the-box.

npm install @decs/typeschema

import {wrap} from '@decs/typeschema';
import {z} from 'zod';
 
// Use your favorite validation library, e.g. `zod`
const wrapped = wrap(z.string());
 
await wrapped.validate('123'); // {success: true, data: '123'}
await wrapped.assert('123'); // '123'