Zodex

Type-safe (de)?serialization library for zod. It both serializes and simplifies types, in the following ways:

• optional, nullable and default types are inlined into any given types itself

{ "type": "string", "defaultValue": "hi" }

• number checks are also inlined into the type itself

{ "type": "number", "min": 23, "max": 42 }

Installation

pnpm add zodex
# or
yarn add zodex
# or
npm install zodex

Usage

import { z } from "zod";
import { zerialize } from "zodex";

const someZodType = z.discriminatedUnion("id", [
  z.object({ id: z.literal("a"), count: z.number().optional() }),
  z.object({ id: z.literal("b") }),
]);
const shape = zerialize(someZodType);

Now typeof shape will be

type Shape = {
  type: "discriminatedUnion";
  discriminator: "id";
  options: [
    {
      type: "object";
      properties: {
        id: { type: "literal"; value: "a" };
        count: { type: "number"; isOptional: true };
      };
    },
    { type: "object"; properties: { id: { type: "literal"; value: "b" } } }
  ];
};

which is exactly equal to its runtime value (shown in YAML for brevity, you probably shouldn't use YAML):

type: "discriminatedUnion"
discriminator: "id"
options:
  - type: "object"
    properties:
      id:
        type: "literal"
        value: "a"
      count:
        type: "number"
        isOptional: true
  - type: "object"
    properties:
      id:
        type: "literal"
        value: "b"

Roadmap

• deserialization (WIP lives on branch dezerial, could use some help from TypeScript heroes)
• custom error messages are not included

Caveats

• lazy, effects and brand are omitted
• pipeline and catch types are unwrapped
• native enums are turned into enums