Standard JSON Schema Default Values

[logaretm]

When trying out the recent Standard JSON Schema API like this:

const schema = type({
  firstName: 'string = "First"',
  lastName: 'string = "Last"',
});

const input = schema['~standard']['jsonSchema'].input({ target: "draft-07" });
console.log(input);

I noticed that the JSON schema doesn't have default values included:

{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "type": "object",
    "properties": {
        "firstName": {
            "type": "string"
        },
        "lastName": {
            "type": "string"
        }
    }
}

When compared to other implementers like valibot and zod, I get the following:

{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "type": "object",
    "properties": {
        "firstName": {
            "default": "First",
            "type": "string"
        },
        "lastName": {
            "default": "Last",
            "type": "string"
        }
    }
}

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What I'm working on

I'm implementing a few functionalities that plan to consume standard JSON schemas for forms, one of those features is default value resolution in formwerkjs/formwerk#238

This will also be ported to vee-validate v5 since v4 had that capability via resolvers which is dropped in favor of standard schema support.

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So is there any plans to support that? I'm not sure if there was a discussion about it. Happy to try PRing it if that's something arktype will be willing to support.