correttore

A proof of concept of a tree shakable Zod alternative. This library aims to have a 1:1 Zod compatible API, but with fine grain control over the final bundle size. This was done by a combination of Proxies and type-level programming.

🤓 You can read the blog post to learn how it works.

Usage

// 1. import `initCorrettore` and features (validator) you want to use
import { initCorrettore, string, email, min, object } from "correttore"; // 0.54 kB

// 2. init the entrypoint variable `c`. It corresponds to Zod's `z`.
export const c = initCorrettore([string, email, min, object]);

// 3. create schemas. Autocompletion will only show methods passed to `initCorrettore`.
// the `object` method is always available
const loginSchema = c.object({
  email: c.string().email(),
  password: c.string().min(5),
});

// 4. Infer type from schema:
import type { Infer } from "correttore";

type LoginSchema = Infer<typeof loginSchema>;
//   ^? {
//       email: string;
//       password: string;
//     }

// 5. Parse unknown data
const parsed = loginSchema.parse({
  email: "hello@test.com",
  password: "password123",
});

// this will throw
loginSchema.parse({
  email: "hello@test.com",
  // missing field
});

Installation

Note: This library is not production ready, I implemented only a handful of parsers as a PoC. If you're interested in this project, check out the contributing section.

# choose your package manager
pnpm add correttore
yarn add correttore
npm install correttore

Comparison with Zod

Zod:

import { z } from "zod"; // 12.8 kB

const LoginSchema = z.object({
  email: z.string().email(),
  password: z.string().min(8),
});

// Throws error
LoginSchema.parse({ email: "", password: "" });

// Returns data as { email: string; password: string }
LoginSchema.parse({ email: "jane@example.com", password: "12345678" });

Correttore:

import { email, min, initCorrettore, string, object } from "correttore"; // 0.54 kB

export const c = initCorrettore([string, email, min, object]);

const LoginSchema = c.object({
  email: c.string().email(),
  password: c.string().min(8),
});

// Throws error
LoginSchema.parse({ email: "", password: "" });

// Returns data as { email: string; password: string }
LoginSchema.parse({ email: "jane@example.com", password: "12345678" });

Contributing

If you're interested in helping to bring this project to a production ready state, feel free to open a PR with changes that will bring it closer to a 1:1 Zod compatible API.

List of stuff to do:

• Add more APIs (refer to the Roadmap (#2) to find out what needs to be done)
• Add tests
• Add docs/guides
• Create premade "bundles" of popular subsets of APIs users may want to import