Object properties are all optional by default

import * as Zod from "zod";

const Dog = Zod.object({ name: Zod.string(), age: Zod.number(), }); type Dog = Zod.infer<typeof Dog>;

Copied this code straight from the docs. The type of “Dog” is { name?: string, age?: number }. In the docs it says it should be { name: string, age: number }

[DavidR95]

In case anyone had the same issue as me (with a new Nest project, in this instance), I thought I had enabled strict: true, but I also had strictNullChecks: false set separately, which was making all properties optional. Just needed to enable that too (or remove it, as it’s the default) and everything worked fine.

[scotttrinh]

@srounce

After checking that you don’t accidentally have strictNullChecks: false (thanks @DavidR95!) can you verify that they’re using the same version of Zod and TypeScript? As you noted, infer is working within a single package/module boundary, so it must be something about how dependencies are being resolved and/or how typescript is handling the imported type definitions.