zod but 100x faster? 👀

// Discriminated unions
const event = type(
  { kind: "'click'", x: "number", y: "number" } |
    { kind: "'keydown'", key: "string", ctrlKey: "boolean" }
);
 
// Recursive structures
const tree = type({ value: "string", children: "tree[]" });
 
// Ranges
const config = type({ port: "1<=number<=65535", timeout: "0<=number<=300000" });

const check = type("string|number\[]");
 
check("hello"); // ✅
check(\[1, 2, 3]); // ✅
check({}); // ❌ Error: Expected string or array of numbers

import express from "express";
import { type } from "arktype";
 
const app = express();
app.use(express.json());
 
const createUserBody = type({
  name: "string",
  email: "string.email",
  age: "number>=18",
});
 
app.post("/users", (req, res) => {
  const body = createUserBody(req.body);
  if (body instanceof type.errors)
    return res.status(400).json({ errors: body.summary });
  res.json({ user: body });
});

import { useForm } from "react-hook-form";
import { type } from "arktype";
const loginSchema = type({ email: "string.email", password: "string>=8" });
function LoginForm() {
  const {
    register,
    handleSubmit,
    formState: { errors },
  } = useForm();
  const onSubmit = (data: unknown) => {
    const validated = loginSchema(data);
    if (validated instanceof type.errors) return;
  };
  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      \<input {...register("email")} />
      {errors.email && <span>{errors.email.message}</span>}
    </form>
  );
}