properties of instances as generic type / type parameter

[Mlocik97]

let say for example I have instance of search.

const custom_search = search.create({
        type: search.Type.SALES_ORDER,
        filters: [...], // some filters here
        columns: ["cust_field1", "cust_field2"]
})

// custom_search.columns
// TSC tells it's type is `string[]`

is what I get rn. is string[].... that's meh.... I specified array, that is already populed with specific values.
it would be nice, if TSC would tell it's type is ["cust_field1", "cust_field2"].

This would be possible with something like (ofc it's not really working solution, we need to handle search.column and it's properties too):

create<T extends ( string | search.column )>({
      columns: T[]
}): {
      columns: T[]
}

LET'S DO IT!

[MrRob]

@Mlocik97 Sounds interesting! Do you want to create a pull request for this?

[ShawnTalbert]

Can someone illustrate how this would be used?

It's very rare in my experience to manipulate that columns array after creating the search?

Or is the goal not to change the array but merely read it in a strongly typed way?

[Mlocik97]

I use it in my library... I don't need to write to columns, just read it in a strongly typed way.

I will see how a lot of time I will have, and will try to create PR.