@uinz/validate v2.0.9

TypeSafe Validate

install

yarn add @uinz/validate

example

import * as t from "@uinz/validate";
import { asserts } from "@uinz/validate"; // @see https://github.com/microsoft/TypeScript/issues/34596

const schema = t.object({
  name: t.string(),
  age: t.number(),
  height: t.number().optional(),
});

declare let x: unknown;

// x is {type}
if (schema.validate(x)) {
  console.log("my name is:", x.name.toUppercase());
  //                          ^ x.name is string
  console.log("I am", x.height?.toUppercase() ?? "x", "cm");
  //                   ^ x.height is number | undefined
}

// asserts x is {type}
try {
  asserts(schema, { age: 13 }, "user", true);
} catch (error) {
  console.log(error.message); // TypeError: user.name not a string
}

API