Expose types for `createPages()`

[fuma-nama]

The types of fns parameter are not exposed, e.g. CreatePage & CreateRoot, it is difficult to reuse them when using config-based routing. For example, to separate one createPages into multiple functions:

function dashboard(fns: <Missing_Type>) {

}

function blog(fns: <Missing_Type>) {

}

return createPages(fns => {
  dashboard(fns)
  blog(fns)
  return null as never
})

I think it would be great if the types in create-pages.tsx can be exposed publicly.

[dai-shi]

Thanks for raising this up. As it's been around for a while, it's considerable.

Do you have more realistic example?
Like the case this doesn't work.

function dashboard(fns: Parameters<Parameters<typeof createPages>[0]>[0]) {

}

I don't mean it's not ugly.

[fuma-nama]

Yep it works but kinda hacky/ugly, I think exposing the types would be more reasonable as createPages() is a public API.

[dai-shi]

The API is public, but if types are exported, renaming them will be a type breaking change. But, as I said it's been fairly stable, so I'll export some of them.

[dai-shi]

@fuma-nama Could you check if #2070 works? I'm not sure if it's helpful.

[fuma-nama]

Yep I think that is useful, thanks a lot.