pub fn app() -> Result(Nil, Nil)

pub fn component(
  ps: List(#(String, fn() -> JsObject)),
  p: String,
) -> Result(Nil, Nil)

pub fn components() -> List(#(String, fn() -> JsObject))

pub fn page(
  ps: List(#(String, fn() -> JsObject)),
  p: String,
) -> Result(Nil, Nil)

pub fn pages() -> List(#(String, fn() -> JsObject))