Deepkit Runtime Types // Examples

Validate username and email

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import { Email, MaxLength, MinLength, Pattern, validate } from '@deepkit/type';

type Username = string & MinLength<3> & MaxLength<20> & Pattern<'^[a-zA-Z0-9]+$'>;

class User {
    email: Email = '';
    username: Username = '';
}

const errors = validate<User>({ email: 'peter@example.com', username: 'pet' });
console.log(errors); // [{ path: 'username', message: '...' }]