Access the list of valid options inside the error message without typescript complaining

[JacobWeisenburger]

I have a list of options that I want to validate, but when an incorrect value is put in, then the error is not very helpful. So I am trying to write my own error messages. But there seems to be no way to access the list of valid options inside the error message without typescript complaining.

When I ignore the ts errors, it runs just fine. So what am I doing wrong?

export const unionOfLiteralsSchema = z.union( [
    //       ^^^^^^^^^^^^^^^^^^^^^
    // 'unionOfLiteralsSchema' implicitly has type 'any' because it does not have a
    // type annotation and is referenced directly or indirectly in its own initializer.
    z.literal( 'item 1' ),
    z.literal( 'item 2' ),
    z.literal( 'item 3' ),
], {
    errorMap: ( issues, ctx ) => ( {
        message: `${ ctx.data } is not a valid option.
        Please choose a valid option: ${ unionOfLiteralsSchema.options.map( o => o.value ) }`,
    } )
} )

export const enumSchema = z.enum( [
    //       ^^^^^^^^^^
    // 'enumSchema' implicitly has type 'any' because it does not have a
    // type annotation and is referenced directly or indirectly in its own initializer.
    'item 1',
    'item 2',
    'item 3',
], {
    errorMap: ( issues, ctx ) => ( {
        message: `${ ctx.data } is not a valid option.
        Please choose a valid option: ${ enumSchema.options }`,
    } )
} )

[JacobWeisenburger]

I ended up figuring it out later.

I still can't seem to figure it out for a union of literal strings though.

const enumSchema = z.enum( [
    'item 1',
    'item 2',
    'item 3',
], {
    errorMap: ( issue, ctx ) => {
        if ( issue.code === 'invalid_enum_value' ) return ( {
            message: `${ ctx.data } is not a valid option.
            Please choose a valid option: ${ issue.options }`,
        } )
        return { message: ctx.defaultError }
    }
} )