fix: AsArgs default value type

[paoloricciuti]

The current types are a bit weird to work with...since it's expecting something if you have a variable that can be null or undefined it will yell at you (even tho it doesn't make sense since undefined is technically an acceptable value).

Furthermore the (string | {}) trick doesn't make sense here where the value can be anything (a number for example).

There's still one issue that I wasn't fully able to solve yet: for checkbox if you have a boolean value TS will complain because boolean is not assignable to true and false which is what the type is expecting (actual strict values, not just boolean).

Do you have any ideas on how to fix this?

[changeset-bot]

🦋 Changeset detected

Latest commit: 6d6c537

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@sveltejs/kit	Patch

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[svelte-docs-bot]

Preview: https://svelte-dev-git-preview-kit-15681-svelte.vercel.app/

[henrykrinkle01]

I'm glad this is being worked on. It's been bugging me since release.
I hope you can fix the type for the discriminator in a discriminated union schema as well. For example:

const base = z.object({ /* some fields */})

const type1 = base.extend({
    typeId: z.literal(1),
    /* other fields */
})
const type2 = base.extend({
    typeId: z.literal(2),
    /* other fields */
})
const combined = z.discriminatedUnion('typeId',
    [type1, type2]
)

TS doesn't even accept literal values like 1 or 2:

Argument of type '1' is not assignable to parameter of type '"number" | "range"'

[elliott-with-the-longest-name-on-github]

@paoloricciuti is this related to #15723, or are they completely different?

[dummdidumm]

Is there something we can add to the type tests? So we don't regress

[teemingc]

I think the additional issue mentioned in the PR description is still being worked on so I've changed this to a draft for now

[pkg-svelte-dev]

Install the latest version of @sveltejs/kit from 6d6c537:

pnpm add https://pkg.svelte.dev/@sveltejs/kit/c/6d6c5375e5a27a9b6dc6ee24a592e060e74c1808

Open in pkg.svelte.dev: https://pkg.svelte.dev/repos/kit/pr/15681

[teemingc]

I've removed the null since that currently doesn't work as a remote form input field but we can always open another PR if that's something we want to allow.